10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(MARK ONE)

☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file number 1-12675 (Kilroy Realty Corporation)

Commission file number 000-54005 (Kilroy Realty, L.P.)

KILROY REALTY CORPORATION

KILROY REALTY, L.P.

(Exact name of registrant as specified in its charter)

Kilroy Realty Corporation	Maryland	95-4598246
	(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
Kilroy Realty, L.P.	Delaware	95-4612685
	(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

12200 W. Olympic Boulevard, Suite 200, Los Angeles, California, 90064

(Address of principal executive offices) (Zip Code)

(310) 481-8400

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Registrant	Title of each class	Name of each exchange on which registered	Ticker Symbol
Kilroy Realty Corporation	Common Stock, $.01 par value	New York Stock Exchange	KRC

Securities registered pursuant to Section 12(g) of the Act:

Registrant	Title of each class
Kilroy Realty, L.P.	Common Units Representing Limited Partnership Interests

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Kilroy Realty Corporation  Yes  ☒  No  ☐    Kilroy Realty, L. P.  Yes  ☒  No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.

Kilroy Realty Corporation  Yes  ☐  No  ☒    Kilroy Realty, L. P.  Yes  ☐  No  ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. 

Kilroy Realty Corporation  Yes  ☒  No  ☐    Kilroy Realty, L. P.  Yes  ☒  No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    

Kilroy Realty Corporation  Yes  ☒  No  ☐    Kilroy Realty, L. P.  Yes  ☒  No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Kilroy Realty Corporation
☒	Large accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	☐	Smaller reporting company
☐	Emerging growth company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o
Kilroy Realty, L.P.
☐	Large accelerated filer	☐	Accelerated filer	☒	Non-accelerated filer	☐	Smaller reporting company
☐	Emerging growth company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    

Kilroy Realty Corporation  Yes  ☐  No  ☒    Kilroy Realty, L. P.  Yes  ☐  No  ☒

The aggregate market value of the voting and non-voting shares of common stock held by non-affiliates of Kilroy Realty Corporation was approximately $7,416,459,726 based on the quoted closing price on the New York Stock Exchange for such shares on June 30, 2019.

There is no public trading market for the common units of limited partnership interest of Kilroy Realty, L.P. As a result, the aggregate market value of the common units of limited partnership interest held by non-affiliates of Kilroy Realty, L.P. cannot be determined.

As of February 7, 2020, 106,167,149 shares of Kilroy Realty Corporation’s common stock, par value $.01 per share, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Kilroy Realty Corporation’s Proxy Statement with respect to its 2020 Annual Meeting of Stockholders to be filed not later than 120 days after the end of the registrant’s fiscal year are incorporated by reference into Part III of this Form 10-K.

EXPLANATORY NOTE

This report combines the annual reports on Form 10-K for the year ended December 31, 2019 of Kilroy Realty Corporation and Kilroy Realty, L.P. Unless stated otherwise or the context otherwise requires, references to “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” mean Kilroy Realty Corporation, a Maryland corporation, and its controlled and consolidated subsidiaries, and references to “Kilroy Realty, L.P.” or the “Operating Partnership” mean Kilroy Realty, L.P., a Delaware limited partnership, and its controlled and consolidated subsidiaries.

The Company is a real estate investment trust, or REIT, and the general partner of the Operating Partnership. As of December 31, 2019, the Company owned an approximate 98.1% common general partnership interest in the Operating Partnership. The remaining approximate 1.9% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of the Company. As the sole general partner of the Operating Partnership, the Company exercises exclusive and complete discretion over the Operating Partnership’s day-to-day management and control and can cause it to enter into certain major transactions including acquisitions, dispositions, and refinancings and cause changes in its line of business, capital structure and distribution policies.

There are a few differences between the Company and the Operating Partnership that are reflected in the disclosures in this Form 10-K. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how the Company and the Operating Partnership operate as an interrelated, consolidated company. The Company is a REIT, the only material asset of which is the partnership interests it holds in the Operating Partnership. As a result, the Company generally does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing equity from time to time and guaranteeing certain debt of the Operating Partnership. The Company itself is not directly obligated under any indebtedness, but generally guarantees all of the debt of the Operating Partnership. The Operating Partnership owns substantially all of the assets of the Company either directly or through its subsidiaries, conducts the operations of the Company’s business and is structured as a limited partnership with no publicly-traded equity. Except for net proceeds from equity issuances by the Company, which the Company generally contributes to the Operating Partnership in exchange for units of partnership interest, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s incurrence of indebtedness or through the issuance of units of partnership interest.

Noncontrolling interests, stockholders’ equity and partners’ capital are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership. The common limited partnership interests in the Operating Partnership are accounted for as partners’ capital in the Operating Partnership’s financial statements and, to the extent not held by the Company, as noncontrolling interests in the Company’s financial statements. The Operating Partnership’s financial statements reflect the noncontrolling interest in Kilroy Realty Finance Partnership, L.P., a Delaware limited partnership (the “Finance Partnership”). This noncontrolling interest represents the Company’s 1% indirect general partnership interest in the Finance Partnership, which is directly held by Kilroy Realty Finance, Inc., a wholly owned subsidiary of the Company. The differences between stockholders’ equity, partners’ capital and noncontrolling interests result from the differences in the equity issued by the Company and the Operating Partnership, and in the Operating Partnership’s noncontrolling interest in the Finance Partnership.

We believe combining the annual reports on Form 10-K of the Company and the Operating Partnership into this single report results in the following benefits:

• Combined reports better reflect how management and the analyst community view the business as a single operating unit;

• Combined reports enhance investors’ understanding of the Company and the Operating Partnership by enabling them to view the business as a whole and in the same manner as management;

• Combined reports are more efficient for the Company and the Operating Partnership and result in savings in time, effort and expense; and

• Combined reports are more efficient for investors by reducing duplicative disclosure and providing a single document for their review.

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To help investors understand the significant differences between the Company and the Operating Partnership, this report presents the following separate sections for each of the Company and the Operating Partnership:

• Item 6. Selected Financial Data – Kilroy Realty Corporation;

• Item 6. Selected Financial Data – Kilroy Realty, L.P.;

• Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations:

◦ —Liquidity and Capital Resources of the Company; and

◦ —Liquidity and Capital Resources of the Operating Partnership;

• consolidated financial statements;

• the following notes to the consolidated financial statements:

◦ Note 8, Secured and Unsecured Debt of the Company;

◦ Note 9, Secured and Unsecured Debt of the Operating Partnership;

◦ Note 11, Noncontrolling Interests on the Company’s Consolidated Financial Statements;

◦ Note 12, Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements;

◦ Note 13, Stockholders’ Equity of the Company;

◦ Note 14, Partners’ Capital of the Operating Partnership;

◦ Note 21, Net Income Available to Common Stockholders Per Share of the Company;

◦ Note 22, Net Income Available to Common Unitholders Per Unit of the Operating Partnership;

◦ Note 23, Supplemental Cash Flow Information of the Company;

◦ Note 24, Supplemental Cash Flow Information of the Operating Partnership;

◦ Note 26, Quarterly Financial Information of the Company (Unaudited); and

◦ Note 27, Quarterly Financial Information of the Operating Partnership (Unaudited).

This report also includes separate sections under Item 9A. Controls and Procedures and separate Exhibit 31 and Exhibit 32 certifications for the Company and the Operating Partnership to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Company and Operating Partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and 18 U.S.C. §1350.

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TABLE OF CONTENTS

		Page
	PART I
Item 1.	Business	5
Item 1A.	Risk Factors	15
Item 1B.	Unresolved Staff Comments	35
Item 2.	Properties	36
Item 3.	Legal Proceedings	46
Item 4.	Mine Safety Disclosures	46
	PART II
Item 5.	Market for Kilroy Realty Corporation’s Common Equity, Related Stockholder Matters and    Issuer Purchases of Equity Securities	47
	Market for Kilroy Realty, L.P.’s Common Equity, Related Stockholder Matters and Issuer    Purchases of Equity Securities	48
Item 6.	Selected Financial Data – Kilroy Realty Corporation	50
	Selected Financial Data – Kilroy Realty, L.P.	52
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	54
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	93
Item 8.	Financial Statements and Supplementary Data	94
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	94
Item 9A.	Controls and Procedures	95
Item 9B.	Other Information	99
	PART III
Item 10.	Directors, Executive Officers and Corporate Governance	99
Item 11.	Executive Compensation	99
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder    Matters	99
Item 13.	Certain Relationships and Related Transactions, and Director Independence	99
Item 14.	Principal Accountant Fees and Services	99
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	100
	SIGNATURES	105

PART I

This document contains certain “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including, among other things, statements or information concerning our plans, objectives, capital resources, portfolio performance, results of operations, projected future occupancy and rental rates, lease expirations, debt maturities, potential investments, strategies such as capital recycling, development and redevelopment activity, projected construction costs, projected construction commencement and completion dates, projected square footage of space that could be constructed on undeveloped land that we own, projected rentable square footage of or number of units in properties under construction or in the development pipeline, anticipated proceeds from capital recycling activity or other dispositions and anticipated dates of those activities or dispositions, projected increases in the value of properties, dispositions, future executive incentive compensation, pending, potential or proposed acquisitions, plans to grow our net operating income and funds from operations, our ability to re-lease properties at or above current market rates, anticipated market conditions, demographics and other forward-looking financial data, as well as the discussion in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations -Factors That May Influence Future Results of Operations.” Forward-looking statements are based on our current expectations, beliefs and assumptions, and are not guarantees of future performance. Forward-looking statements are inherently subject to uncertainties, risks, changes in circumstances, trends and factors that are difficult to predict, many of which are outside of our control. Accordingly, actual performance, results and events may vary materially from those indicated or implied in the forward-looking statements, and you should not rely on the forward-looking statements as predictions of future performance, results or events. All forward-looking statements are based on information that was available and speak only as of the dates on which they were made. We assume no obligation to update any forward-looking statement that becomes untrue because of subsequent events, new information or otherwise, except to the extent we are required to do so in connection with our ongoing requirements under federal securities laws.

In addition, this report contains information and statistics regarding, among other things, the industry, markets, submarkets and sectors in which we operate, the percentage by which certain leases are above or below applicable market rents and the number of square feet of office and other space that could be developed from specific parcels of undeveloped land. We obtained this information and these statistics from various third-party sources and our own internal estimates. We believe that these sources and estimates are reliable but have not independently verified them and cannot guarantee their accuracy or completeness.

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ITEM 1. BUSINESS

The Company

We are a self-administered REIT active in premier office and mixed-use submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Greater Los Angeles, San Diego County, the San Francisco Bay Area and Greater Seattle, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). We own our interests in all of our real estate assets through the Operating Partnership and the Finance Partnership and generally conduct substantially all of our operations through the Operating Partnership.

Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2019:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied		Percentage Leased
Stabilized Office Properties	112	13,475,795	451	94.6	%	97.0	%

	Number of Buildings	Number of Units	2019 Average Occupancy
Stabilized Residential Property	1	200	82.4	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently committed for construction, under construction, or in the tenant improvement phase, undeveloped land, recently completed residential properties not yet stabilized and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and retail properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets at the historical cost of the property as the projects are placed in service.

During the year ended December 31, 2019, we added one completed development project to our stabilized office portfolio consisting of 394,340 square feet in San Francisco, California. As of December 31, 2019, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2019.

	Number of Properties/Projects	Estimated Rentable Square Feet (1) /Units
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

________________________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

Our stabilized portfolio also excludes our future development pipeline, which as of December 31, 2019, was comprised of five future development sites, representing approximately 61 gross acres of undeveloped land.

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As of December 31, 2019, all of our properties and development projects were owned and all of our business was conducted in the state of California with the exception of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. All of our properties and development projects are 100% owned, excluding four office properties owned by three consolidated property partnerships, and two development projects held in Variable Interest Entities (“VIEs”) which we consolidated for financial reporting purposes (see Note 2 “Basis of Significant Accounting Policies” to our consolidated financial statements included in this report). The two VIEs were established to facilitate potential future transactions intended to qualify as a like-kind exchanges pursuant to Section 1031 of the Code (“Section 1031 Exchange”) to defer taxable gains on dispositions for federal and state income tax purposes. Two of the three consolidated property partnerships, 100 First Street Member, LLC (“100 First LLC”) and 303 Second Street Member, LLC (“303 Second LLC”), each owned one office property in San Francisco, California through subsidiary REITs. As of December 31, 2019, the Company owned a 56% common equity interest in both 100 First LLC and 303 Second LLC. The third consolidated property partnership, Redwood City Partners, LLC (“Redwood LLC”), owned two office properties in Redwood City, California. As of December 31, 2019, the Company owned an approximate 93% common equity interest in Redwood LLC. The remaining interests in all three property partnerships were owned by unrelated third parties. All three property partnerships are consolidated entities.

We own our interests in all of our real estate assets through the Operating Partnership and the Finance Partnership and generally conduct substantially all of our operations through the Operating Partnership of which we owned a 98.1% common general partnership interest as of December 31, 2019. The remaining 1.9% common limited partnership interest in the Operating Partnership as of December 31, 2019 was owned by non-affiliated investors and certain of our executive officers and directors. Kilroy Realty Finance, Inc., a wholly owned subsidiary of the Company, is the sole general partner of the Finance Partnership and owns a 1.0% common general partnership interest in the Finance Partnership. The Operating Partnership owns the remaining 99.0% common limited partnership interest. With the exception of the Operating Partnership and our consolidated property partnerships, all of our subsidiaries are wholly-owned.

Available Information; Website Disclosure; Corporate Governance Documents

Kilroy Realty Corporation was incorporated in the state of Maryland on September 13, 1996 and Kilroy Realty, L.P. was organized in the state of Delaware on October 2, 1996. Our principal executive offices are located at 12200 W. Olympic Boulevard, Suite 200, Los Angeles, California 90064. Our telephone number at that location is (310) 481-8400. Our website is www.kilroyrealty.com. The information found on, or otherwise accessible through, our website is not incorporated into, and does not form a part of, this annual report on Form 10-K or any other report or document we file with or furnish to the SEC. All reports we will file with the SEC are available free of charge via EDGAR through the SEC website at www.sec.gov. All reports that we will file with the SEC will also be available free of charge on our website at www.kilroyrealty.com as soon as reasonably practicable after we file those materials with, or furnish them to, the SEC.

The following documents relating to corporate governance are also available free of charge on our website under “Investors —Overview —Corporate Governance” and available in print to any security holder upon request:

• Corporate Governance Guidelines;

• Code of Business Conduct and Ethics;

• Audit Committee Charter;

• Executive Compensation Committee Charter;

• Nominating / Corporate Governance Committee Charter; and

• Corporate Social Responsibility and Sustainability Committee Charter.

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You may request copies of any of these documents by writing to:

Attention: Investor Relations

Kilroy Realty Corporation

12200 West Olympic Boulevard, Suite 200

Los Angeles, California 90064

We intend to disclose on our website under “Investors —Overview —Corporate Governance” any amendment to, or waiver of, any provisions of our Code of Business Conduct and Ethics applicable to the directors and/or officers of the Company that would otherwise be required to be disclosed under the rules of the Securities and Exchange Commission or the New York Stock Exchange.

Business and Growth Strategies

Growth Strategies.    We believe that a number of factors and strategies will enable us to continue to achieve our objectives of long-term sustainable growth in Net Operating Income (defined below) and FFO (defined below) as well as maximization of long-term stockholder value. These factors and strategies include:

• the quality, geographic location, physical characteristics and operating sustainability of our properties;

• our ability to efficiently manage our assets as a low cost provider of commercial real estate through our seasoned management team possessing core capabilities in all aspects of real estate ownership, including property management, leasing, marketing, financing, accounting, legal, and construction and development management;

• our access to development, redevelopment, acquisition and leasing opportunities as a result of our extensive experience and significant working relationships with major West Coast property owners, corporate tenants, municipalities and landowners given our over 70-year presence in the West Coast markets;

• our active development program and our future development pipeline of undeveloped land sites (see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors That May Influence Future Results of Operations” for additional information pertaining to the Company’s in-process and future development pipeline);

• our capital recycling program (see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Operating Partnership” for additional information pertaining to the Company’s capital recycling program and related property and land dispositions);

• our ability to capitalize on inflection points in a real estate cycle to add quality assets to our portfolio at substantial discounts to long-term value, through either acquisition, development or redevelopment; and

• our strong financial position that has and will continue to allow us to pursue attractive acquisition and development and redevelopment opportunities.

“Net Operating Income” subsequent to the adoption of Financial Standards Accounting Board Accounting Standards Codification 842 (“Topic 842”) is defined as consolidated operating revenues (rental income and other property income) less consolidated operating expenses (property expenses, real estate taxes and ground leases). Prior to the adoption of Topic 842 we defined Net Operating Income as consolidated operating revenues (rental income, tenant reimbursements and other property income) less consolidated operating expenses (property expenses, real estate taxes, provision for bad debts and ground leases). “FFO” is Funds From Operations available to common stockholders and common unitholders calculated in accordance with the 2018 Restated White Paper on FFO approved by the Board of Governors of the National Association of Real Estate Investment Trusts (“NAREIT”). (See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Results of Operations” and “—Non-GAAP Supplemental Financial Measures: Funds From Operations” for a reconciliation of these measures to generally accepted accounting principles (“GAAP”) net income available to common stockholders.)

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Operating Strategies.    We focus on enhancing long-term growth in Net Operating Income and FFO from our properties by:

• maximizing cash flow from our properties through active leasing, early renewals and effective property management;

• structuring leases to maximize returns;

• managing portfolio credit risk through effective underwriting, including the use of credit enhancements and interests in collateral to mitigate portfolio credit risk;

• managing operating expenses through the efficient use of internal property management, leasing, marketing, financing, accounting, legal, and construction and development management functions;

• maintaining and developing long-term relationships with a diverse tenant base;

• continuing to effectively manage capital improvements to enhance our properties’ competitive advantages in their respective markets and improve the efficiency of building systems;

• continuing to expand our management team with individuals who have extensive regional and product-type experience and are highly knowledgeable in their respective markets and product types; and

• attracting and retaining motivated employees by providing financial and other incentives to meet our operating and financial goals.

Development and Redevelopment Strategies.    We and our predecessors have developed office properties primarily located in California since 1947. As of December 31, 2019, we had two projects in the tenant improvement phase totaling approximately 846,000 square feet of office and retail space and six projects under construction totaling approximately 2.3 million square feet of office space and 564 residential units. In addition, our future development pipeline was comprised of five potential development sites representing approximately 61 gross acres of undeveloped land on which we believe we have the potential to develop over 6.0 million square feet of office, life science, laboratory, residential and retail space, depending upon economic conditions. Our strategy with respect to development is to:

• own land sites in highly populated, amenity rich locations that are attractive to a broad array of tenants;

• be the premier provider of modern and collaborative office and mixed-use projects on the West Coast with a focus on design and environment;

• maintain a disciplined approach by commencing development when appropriate based on market conditions, focusing on pre-leasing, developing in stages or phasing, and cost control;

• reinvest capital from dispositions of selective assets into new state-of-the-art development and acquisition opportunities with higher cash flow and rates of return or future redevelopment;

• execute on our development projects under construction and future development pipeline, including expanding entitlements; and

• evaluate redevelopment opportunities in supply-constrained markets because such efforts generally achieve similar returns to new development with reduced entitlement risk and shorter construction periods.

We may engage in the additional development or redevelopment of office, life science and mixed-use properties when market conditions support a favorable risk-adjusted return on such development or redevelopment. We expect that our significant working relationships with tenants, municipalities and landowners on the West Coast will give us further access to development and redevelopment opportunities. We cannot ensure that we will be able to successfully develop or redevelop any of our properties or that we will have access to additional development or redevelopment opportunities.

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Acquisition Strategies.    We believe we are well positioned to acquire opportunistic properties and development and redevelopment opportunities as the result of our extensive experience, strong financial position and ability to access capital. We continue to focus on growth opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, healthcare, life sciences, entertainment and professional services. Against the backdrop of market volatility, we expect to manage a strong balance sheet, execute on our development program and selectively evaluate opportunities that add immediate Net Operating Income to our portfolio or play a strategic role in our future growth and that:

• provide attractive yields and significant potential for growth in cash flow from property operations;

• present growth opportunities in our existing or other strategic markets; and

• demonstrate the potential for improved performance through intensive management, repositioning, capital investment and leasing that should result in increased occupancy and rental revenues.

Financing Strategies.    Our financing policies and objectives are determined by our board of directors. Our goal is to limit our dependence on leverage and maintain a conservative ratio of debt-to-total market capitalization. As of December 31, 2019, our total debt as a percentage of total market capitalization was 28.3%, which was calculated based on the quoted closing price per share of the Company’s common stock of $83.90 on December 31, 2019 (see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Company —Capitalization” for additional information). Our financing strategies include:

• maintaining financial flexibility, including a low secured to unsecured debt ratio;

• maximizing our ability to access a variety of both public and private capital sources;

• maintaining a staggered debt maturity schedule in which the maturity dates of our debt are spread over several years to limit risk exposure at any particular point in the capital and credit market cycles;

• completing financing in advance of the need for capital;

• managing interest rate exposure by generally maintaining a greater amount of fixed-rate debt as compared to variable-rate debt; and

• maintaining our credit ratings.

We utilize multiple sources of capital, including borrowings under our unsecured revolving credit facility, unsecured term loan facility, proceeds from the issuance of public or private debt or equity securities and other bank and/or institutional borrowings and our capital recycling program, including strategic venture sources. There can be no assurance that we will be able to obtain capital as needed on terms favorable to us or at all. (See the discussion under the caption “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors That May Influence Future Results of Operations” and “Item 1A. Risk Factors.”)

Sustainability Strategies. Our longstanding leadership in sustainability in real estate is globally recognized, and we have committed to achieving carbon neutral operations by year-end 2020. Our vision is a resilient portfolio that minimizes the environmental impact of the development and operation of our buildings while maximizing the health and productivity of our tenants, employees and communities as well as our financial returns. Management and our board of directors, through the Corporate Social Responsibility and Sustainability Committee established in April 2018, oversee and advance the Company’s corporate social responsibility and sustainability initiatives. They recognize that community engagement and sustainable operations benefit all of our constituencies and are key to preserving our Company’s value and credibility.

As a result of our commitment to sustainability, we have been ranked first in sustainability performance in North America in the Listed Office category by the Global Real Estate Sustainability Benchmark (“GRESB”) six times and have also earned the highly competitive GRESB “Green Star” designation in each of the last seven years for ranking

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in the top 25% of companies worldwide in sustainability performance. We have been recognized with the US EPA ENERGY STAR^® Partner of the Year Sustained Excellence Award for the last five years, NAREIT’s Leader in the Light Award in the Listed Office category for the last six years and NAREIT’s Leader in the Light Most Innovative award in 2018. For excellence in creating a diverse and inclusive culture, we are listed on the Bloomberg Gender Equality Index, which measures companies on female leadership and talent pipeline, equal pay and gender pay parity, inclusive culture, sexual harassment policies and pro-women brand.

We manage our properties to offer the maximum degree of utility and operational efficiency to our tenants. We offer tenant sustainability programs focused on helping our tenants reduce their energy and water consumption and increase their recycling diversion rates. We incorporate green lease language into 100% of our new leases, including a cost recovery clause for resource-efficiency related capital expenditures in full-service gross leases, which seek to align tenant and landlord interests on energy, water and waste efficiency. Green leases (also known as aligned leases, high performance leases or energy efficient leases) aim to align the financial and energy incentives of building owners and tenants so they can work together to save money, conserve resources and ensure the efficient operation of buildings. We have won the Institute for Market Transformation’s (“IMT’s”) Green Lease Leaders award four times. Energy consumption, water consumption, and greenhouse gas (“GHG”) emissions data for the periods indicated based on the most recent available information, assured by DNV GL Business Assurance USA, Inc., are as follows:

Energy consumption:^* 

Year (1)	Energy Consumption Data Coverage as % of Total Floor Area (2)		Total Energy Consumed by Floor Area with Data Coverage (MWh) (3)	% of Energy Generated From Renewable Sources (4)		Like-for-Like Change in Energy Consumption of Floor Area with Data Coverage (5)		% of Eligible Portfolio that has Obtained an Energy Rating and is Certified to ENERGY STAR (6)
2018	98	%	299,510	6	%	(2	)%	77	%
2017	96	%	309,248	5	%	(1	)%	73	%
2016	95	%	381,295	3	%	(2	)%	69	%

Water consumption:^* 

Year (1)	Water Withdrawal Data Coverage as a % of Total Floor Area (7)		Total Water Withdrawn by Portfolio (m3) (8)	Like-for-like Change in Water Withdrawn for Floor Area with Data Coverage (5)
2018	96	%	980,859	5	%
2017	98	%	960,920	—	%
2016	90	%	856,290	(2	)%

GHG Emissions:^* 

Year (1)	Scope 1 GHG Data Coverage as a % of Total Floor Area (9)		Scope 1 GHG Emissions (Tonnes CO2) (10)	Like-for-like Change in Scope 1 GHG Emissions Data (5)
2018	99	%	3,908	(4	)%
2017	100	%	4,120	6	%
2016	97	%	4,059	N/A

Year (1)	Scope 2 Location-Based GHG Data Coverage as a % of Total Floor Area (11)		Scope 2 Location-Based GHG Emissions (Tonnes CO2) (12)	Like-for-like Change in Scope 2 Location-Based GHG Emissions Data (5)
2018	99	%	33,207	(6	)%
2017	99	%	36,504	(10	)%
2016	97	%	44,145	N/A

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Year (1)	Scope 2 Market-Based GHG Data Coverage as a % of Total Floor Area (11)(13)		Scope 2 Market-Based GHG Emissions (Tonnes CO2) (12)(13)	Like-for-like Change in Scope 2 Market-Based GHG Emissions Data (5)
2018	99	%	30,439	(12	)%
2017	99	%	35,375	N/A

________________________

* Energy consumption, water consumption and GHG emissions data was assured by way of a Type 2, moderate level assurance assessment, using the AA1000AS (2008) assurance standard in connection with the assurance of the content of our sustainability report by DNV GL Business Assurance USA, Inc. GHG emissions reporting follows the World Business Council for Sustainable Development (WBSCD)/World Resources Institute (WRI) Greenhouse Gas Protocol.

(1) Full 2019 calendar year energy, water and GHG emissions data is not available until after March 30, 2020.

(2) Percentage based on gross square footage of portfolio floor area with complete energy consumption data coverage as of the end of the applicable year. Floor area is considered to have complete energy consumption data coverage when energy consumption data (i.e., energy types and amounts consumed) is obtained by the Company for all types of energy consumed in the relevant floor area during the fiscal year, regardless of when such data was obtained.

(3) Energy includes energy purchased from sources external to the Company and its tenants or produced by the Company or its tenants themselves (self-generated) and energy from all sources, including direct fuel usage, purchased electricity, and heating, cooling and steam energy. Total energy consumption based on floor area with complete energy consumption data coverage as of the end of the applicable year.

(4) Renewable sources include renewable energy the Company directly produced and renewable energy the Company purchased if purchased through a renewable power purchase agreement that explicitly includes renewable energy certificates (“RECs”) or Guarantees of Origin (“GOs”), a Green-e Energy Certified utility or supplier program or other green power products that explicitly include RECs or GOs or for which Green-e Energy Certified RECs are paired with grid electricity. Percentage is based total energy consumption during the applicable year.

(5) Data reported on a like-for-like comparison excludes assets that have been acquired or disposed over the past twenty-four months as of the end of the applicable year.

(6) Eligible portfolio represents our office and residential properties that have had 50% or greater occupancy for 12 consecutive months at any point during the applicable year. Percentage is based on rentable square footage of our eligible portfolio that has obtained an energy rating and is certified to ENERGY STAR® as of the end of the applicable year.

(7) Percentage based on gross square footage of portfolio floor area with complete water withdrawal data coverage as of the end of the applicable year. Floor area is considered to have complete water withdrawal data coverage when water withdrawal data (i.e., amounts withdrawn) is obtained by the Company for the relevant floor area during the fiscal year, regardless of when such data was obtained.

(8) Water sources include surface water (including water from wetlands, rivers, lakes and oceans), groundwater, rainwater collected directly and stored by the Company, wastewater obtained from other entities, municipal water supplies or supply from other water utilities. Total water withdrawal based on floor area with complete water withdrawal data coverage as of the end of the applicable year.

(9) Percentage based on gross square footage of portfolio floor area with complete Scope 1 GHG emissions data coverage as of the end of the applicable year. Floor area is considered to have complete Scope 1 GHG emissions data coverage when GHG emission data (i.e., amounts emitted) is obtained by the Company for the relevant floor area during the fiscal year, regardless of when such data was obtained.

(10) Scope 1 emissions represent those produced by consuming onsite natural gas procured by the Company.

(11) Percentage based on gross square footage of portfolio floor area with complete Scope 2 GHG emissions data coverage as of the end of the applicable year. Floor area is considered to have complete Scope 2 GHG emissions data coverage when GHG emission data is obtained by the Company for the relevant floor area during the fiscal year, regardless of when such data was obtained.

(12) Scope 2 emissions represent those produced by consuming onsite electricity procured by the Company.

(13) We began collecting market-based Scope 2 emissions data in 2017.

We build our current development projects to Leadership in Energy and Environmental Design (“LEED”) specifications. All of our office development projects are designed to achieve LEED certification, either LEED Platinum or Gold.

We are actively pursuing LEED certification for approximately 2.3 million square feet of office and life science space under construction. In addition, an analysis of energy and water performance is included in our standard due diligence process for acquisitions, and reducing energy use year over year is a comprehensive goal of our operational strategy. This is accomplished through systematic energy auditing, mechanical, lighting and other building upgrades, optimizing operations and engaging tenants. During the past few years, we have significantly enhanced the sustainability profile of our portfolio, ending 2019 with 64% of our properties LEED certified and 70% of our eligible properties ENERGY STAR certified (in each case as a percentage of our total or eligible rentable square feet as of December 31, 2019).

We identify climate change as a risk to our business, an opportunity for long-term value creation and a key driver in long-term strategic business decisions. These risks and opportunities include transitional risks such as policy, market, technology and reputational concerns, as well as physical risks, and are a focus area for the board of directors and management.  Climate-related risks and opportunities are governed by the board of directors through the Corporate Social Responsibility and Sustainability Committee (the “Committee”). In 2018, the Committee endorsed the

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recommendations of the Task Force on Climate-related Financial Disclosure (TCFD) and tasked management with assessing and reporting against climate related risk for the Company. Recognizing the importance of reducing the Company’s greenhouse gas impact on the environment, we have committed to achieving carbon neutral operations by December 31, 2020. This means that the entirety of our scope 1 and scope 2 emissions will be offset by this date through a combination of energy efficiency measures and both onsite and offsite renewables. This exceeds our carbon reduction goals previously validated by Science-Based Targets. Science-Based Targets is a collaboration between the Carbon Disclosure Project, the United Nations Global Compact, the World Resources Institute and the World Wide Fund for Nature, which independently assesses and approves the carbon reduction goals of companies.

Significant Tenants

As of December 31, 2019, our 15 largest tenants in terms of annualized base rental revenues represented approximately 49.6% of our total annualized base rental revenues, defined as annualized monthly contractual rents from existing tenants as of December 31, 2019. Annualized base rental revenue includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases and expense reimbursement revenue.

For further information on our 15 largest tenants and the composition of our tenant base, see “Item 2. Properties —Significant Tenants.”

Competition

We compete with several developers, owners, operators and acquirers of office, undeveloped land and other commercial real estate, including mixed-use and residential real estate, many of which own properties similar to ours in the same submarkets in which our properties are located. For further discussion of the potential impact of competitive conditions on our business, see “Item 1A. Risk Factors.”

Segment and Geographic Financial Information

During 2019 and 2018, we had one reportable segment, our office properties segment. For information about our office property revenues and long-lived assets and other financial information, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Results of Operations.”

As of December 31, 2019, all of our properties and development projects were owned and all of our business was conducted in the state of California with the exception of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. As of December 31, 2019, all of our properties and development projects were 100% owned, excluding four office properties owned by three consolidated property partnerships and two development projects held in VIEs to facilitate potential future Section 1031 Exchanges, which have been consolidated for financial reporting purposes (see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report for further information).

Employees

As of December 31, 2019, we employed 267 people through the Operating Partnership, Kilroy Services, LLC, and Kilroy Realty TRS, Inc. We believe that relations with our employees are good.

Environmental Regulations and Potential Liabilities

Government Regulations Relating to the Environment.    Many laws and governmental regulations relating to the environment are applicable to our properties, and changes in these laws and regulations, or their interpretation by agencies and the courts, occur frequently and may adversely affect us.

Existing conditions at some of our properties.    Independent environmental consultants have conducted Phase I or similar environmental site assessments on all of our properties. We generally obtain these assessments prior to the

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acquisition of a property and may later update them as required for subsequent financing of the property, if a property is slated for disposition, or as requested by a tenant. Consultants are required to perform Phase I assessments to American Society for Testing and Materials standards then-existing for Phase I site assessments and typically include a historical review, a public records review, a visual inspection of the surveyed site, and the issuance of a written report. These assessments do not generally include any soil or groundwater sampling or subsurface investigations; however, if a Phase I does recommend that soil or groundwater samples be taken or other subsurface investigations take place, we generally perform such recommended actions. Depending on the age of the property, the Phase I may have included an assessment of asbestos-containing materials or a separate hazardous materials survey may have been conducted. For properties where asbestos-containing materials were identified or suspected, an operations and maintenance plan was generally prepared and implemented.

Historical operations at or near some of our properties, including the presence of underground or above ground storage tanks, various sites uses that involved hazardous substances, the landfilling of hazardous substances and solid waste, and migration of contamination from other sites, may have caused soil or groundwater contamination. In some instances, the prior owners of the affected properties conducted remediation of known contamination in the soils on our properties, we are required to conduct further environmental clean-up and environmental closure activities at certain properties, and residual contamination could pose environmental, health, and safety risks if not appropriately addressed. We may need to investigate or remediate contaminated soil, soil gas, landfill gas, and groundwater, and we may also need to conduct landfill closure and post-closure activities, including, for example, the implementation of groundwater and methane monitoring systems and impervious cover, and the costs of such work could exceed projected or budgeted amounts. To protect the health and safety of site occupants and others, we may be required to implement and operate safeguards, including, for example, vapor intrusion mitigation systems and building protection systems to address methane. We may need to modify our methods of construction or face increased construction costs as a result of environmental conditions, and we may face obligations under agreements with governmental authorities with respect to the management of such environmental conditions. If releases from our sites migrate offsite, or if our site redevelopment activities cause or contribute to a migration of hazardous substances, neighbors or others could make claims against us, such as for property damage, personal injury, or cost recovery.

As of December 31, 2019, we had accrued environmental remediation liabilities of approximately $80.7 million recorded on our consolidated balance sheets in connection with certain of our in-process and future development projects. The accrued environmental remediation liabilities represent the remaining costs we estimate we will incur prior to and during the development process at various development acquisition sites. These estimates, which we developed with the assistance of third party experts, consist primarily of the removal of contaminated soil, performing environmental closure activities, constructing remedial systems and other related costs since we are required to dispose of any existing contaminated soil, and sometimes perform other environmental closure or remedial activities, when we develop new buildings at these sites. It is possible that we could incur additional environmental remediation costs in connection with these development projects.  However, potential additional environmental costs cannot be reasonably estimated at this time and certain changes in estimates could occur as the site conditions, final project timing, design elements, actual soil conditions and other aspects of the projects, which may depend upon municipal and other approvals beyond the control of the Company, are determined. See Note 18 “Commitments and Contingencies” to our consolidated financial statements included in this report for additional information.

Other than the accrued environmental liabilities recorded in connection with certain of our development projects, we are not aware of any such condition, liability, or concern by any other means that would give rise to material environmental liabilities. However, our assessments may have failed to reveal all environmental conditions, liabilities, or compliance concerns; there may be material environmental conditions, liabilities, or compliance concerns that arose at a property after the review was completed; future laws, ordinances, or regulations may impose material additional environmental liability; and environmental conditions at our properties may be affected in the future by tenants, third parties, or the condition of land or operations near our properties, such as the presence of underground storage tanks or migrating plumes. We cannot be certain that costs of future environmental compliance will not have an adverse effect on our financial condition, results of operations, cash flow, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to security holders.

Use of hazardous materials by some of our tenants.    Some of our tenants handle hazardous substances and wastes on our properties as part of their routine operations. Environmental laws and regulations may subject these tenants,

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and potentially us, to liability resulting from such activities. We generally require our tenants in their leases to comply with these environmental laws and regulations and to indemnify us for any related liabilities. As of December 31, 2019, other than routine cleaning materials, approximately 2-4% of our tenants handled hazardous substances and/or wastes on approximately 1-3% of the aggregate square footage of our properties as part of their routine operations. These tenants are primarily involved in the life sciences business. The hazardous substances and wastes are primarily comprised of diesel fuel for emergency generators and small quantities of lab and light manufacturing chemicals including, but not limited to, alcohol, ammonia, carbon dioxide, cryogenic gases, dichlorophenol, methane, naturalyte acid, nitrogen, nitrous oxide, and oxygen which are routinely used by life science companies. We are not aware of any material noncompliance, liability, or claim relating to hazardous or toxic substances or petroleum products in connection with any of our properties, and management does not believe that on-going activities by our tenants will have a material adverse effect on our operations.

Costs related to government regulation and private litigation over environmental matters.    Under applicable environmental laws and regulations, we may be liable for the costs of removal, remediation, or disposal of certain hazardous or toxic substances present or released on our properties. These laws could impose liability without regard to whether we are responsible for, or even knew of, the presence or release of the hazardous materials. Government investigations and remediation actions may have substantial costs, and the presence or release of hazardous substances on a property could result in governmental clean-up actions, personal injury actions, or similar claims by private plaintiffs.

Potential environmental liabilities may exceed our environmental insurance coverage limits, transactional indemnities or holdbacks.    We carry what we believe to be commercially reasonable environmental insurance. Our environmental insurance policies are subject to various terms, conditions and exclusions. Similarly, in connection with some transactions we obtain environmental indemnities and holdbacks that may not be honored by the indemnitors, may be less than the resulting liabilities or may otherwise fail to address the liabilities adequately. Therefore, we cannot provide any assurance that our insurance coverage or transactional indemnities will be sufficient or that our liability, if any, will not have a material adverse effect on our financial condition, results of operations, cash flows, quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to security holders.

Litigation

In 2017, lawsuits were filed in San Francisco County Superior Court alleging vertical and differential settlement at the Millennium Tower property located at 301 Mission Street in San Francisco, California.  The Millennium Tower is not owned by the Company but located in proximity to one of the Company’s properties located at 350 Mission Street.  The lawsuits allege that conduct of various entities, including those affiliated with other neighboring properties, contributed to the settlement of the Millennium Tower.  Two defendants asserted cross-claims for equitable indemnification against certain of the Company’s entities in connection with the development and construction-related activities at the Company’s 350 Mission Street property.  One of those parties has voluntarily dismissed its cross claims against the Company’s entities.  In August 2019, all parties to the lawsuits, including the Company’s entities, reached a settlement in-principle and agreed to stay the litigation pending the negotiation and execution of global settlement documentation. If such settlement documentation is not executed in accordance with the procedural timeline established by the parties to the lawsuit (as the same may be extended), the stay may be lifted. The Company continues to dispute the allegations and deny responsibility for the claims alleged in the lawsuits. 

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ITEM 1A.    RISK FACTORS

The following section sets forth material factors that may adversely affect our business and operations. The following factors, as well as the factors discussed in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors That May Influence Future Results of Operations” and other information contained in this report, should be considered in evaluating us and our business.

Risks Related to our Business and Operations

Global market, economic and geopolitical conditions may adversely affect our business, results of operations, liquidity and financial condition and those of our tenants. Our business may be adversely affected by global market, economic and geopolitical conditions, including general global economic and political uncertainty and dislocations in the credit markets. If these conditions become more volatile or worsen, our and our tenant’s business, results of operations, liquidity and financial condition and those of our tenants may be adversely affected as a result of the following consequences, among others:

• the financial condition of our tenants, many of which are technology; life science and healthcare; finance, insurance and real estate; media and professional business and other service firms, may be adversely affected, which may result in tenant defaults under leases due to bankruptcy, lack of liquidity, operational failures or for other reasons;

• significant job losses in the financial and professional services industries may occur, which may decrease demand for our office space, causing market rental rates and property values to be negatively impacted;

• our ability to obtain financing on terms and conditions that we find acceptable, or at all, may be limited, which could reduce our ability to pursue acquisition and development opportunities and refinance existing debt, reduce our returns from our acquisition and development activities and increase our future interest expense;

• reduced values of our properties may limit our ability to dispose of assets at attractive prices or to obtain debt financing secured by our properties and may reduce the availability of unsecured loans; and

• one or more lenders under the Operating Partnership’s unsecured revolving credit facility could refuse to fund their financing commitment to us or could fail and we may not be able to replace the financing commitment of any such lenders on favorable terms, or at all.

All of our properties are located in California and greater Seattle, Washington and we may therefore be susceptible to adverse economic conditions and regulations, as well as natural disasters, in those areas. Because all of our properties are concentrated in California and greater Seattle, we may be exposed to greater economic risks than if we owned a more geographically dispersed portfolio. Further, within California, our properties are concentrated in Greater Los Angeles, San Diego County and the San Francisco Bay Area, exposing us to risks associated with those specific areas. We are susceptible to adverse developments in the economic and regulatory environments of California and greater Seattle (such as periods of economic slowdown or recession, business layoffs or downsizing, industry slowdowns, relocations of businesses, increases in real estate and other taxes, costs of complying with governmental regulations or increased regulation and other factors), as well as adverse weather conditions and natural disasters that occur in those areas (such as earthquakes, wind, landslides, droughts, fires and other events). For example, many of our assets are in zones that have been impacted by drought and, as such, face the risk of increased water costs and potential fines and/or penalties for high consumption. In addition, California is also regarded as more litigious and more highly regulated and taxed than many other states, which may reduce demand for office space in California.

Any adverse developments in the economy or real estate market in California and the surrounding region, or in greater Seattle or any decrease in demand for office space resulting from the California or greater Seattle regulatory or business environment could impact our ability to generate revenues sufficient to meet our operating expenses or other obligations, which would adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

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Our performance and the market value of our securities are subject to risks associated with our investments in real estate assets and with trends in the real estate industry. Our economic performance and the value of our real estate assets and, consequently the market value of the Company’s securities, are subject to the risk that our properties may not generate revenues sufficient to meet our operating expenses or other obligations. A deficiency of this nature would adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

Events and conditions applicable to owners and operators of real estate that are beyond our control and could impact our economic performance and the value of our real estate assets may include:

• local oversupply or reduction in demand for office, mixed-use or other commercial space, which may result in decreasing rental rates and greater concessions to tenants;

• inability to collect rent from tenants;

• vacancies or inability to rent space on favorable terms or at all;

• inability to finance property development and acquisitions on favorable terms or at all;

• increased operating costs, including insurance premiums, utilities and real estate taxes;

• costs of complying with changes in governmental regulations;

• the relative illiquidity of real estate investments;

• declines in real estate asset valuations, which may limit our ability to dispose of assets at attractive prices or obtain or maintain debt financing;

• changing submarket demographics;

• changes in space utilization by our tenants due to technology, economic conditions and business culture;

• the development of harmful mold or other airborne toxins or contaminants that could damage our properties or expose us to third-party liabilities; and

• property damage resulting from seismic activity or other natural disasters.

We depend upon significant tenants, and the loss of a significant tenant could adversely affect our financial condition, results of operations, ability to borrow funds and cash flows. As of December 31, 2019, our 15 largest tenants represented approximately 49.6% of total annualized base rental revenues. See further discussion on the composition of our tenants by industry and our largest tenants under “Item 2. Properties —Significant Tenants.”

Our financial condition, results of operations, ability to borrow funds and cash flows would be adversely affected if any of our significant tenants fails to renew its lease(s), renew its lease(s) on terms less favorable to us, or becomes bankrupt or insolvent or otherwise unable to satisfy its lease obligations.

Downturn in tenants’ businesses may reduce our revenues and cash flows. For the year ended December 31, 2019, we derived approximately 98.7% of our revenues from rental income. A tenant may experience a downturn in its business, which may weaken its financial condition and result in its failure to make timely rental payments or result in defaults under our leases. In the event of default by a tenant, we may experience delays in enforcing our rights as landlord and may incur substantial costs in protecting our investment.

The bankruptcy or insolvency of a major tenant also may adversely affect the income produced by our properties. If any tenant becomes a debtor in a case under federal bankruptcy law, we cannot evict the tenant solely because of the bankruptcy. In addition, the bankruptcy court might permit the tenant to reject and terminate its lease with us. Our

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claim against the tenant for unpaid and future rent could be subject to a statutory cap that might be substantially less than the remaining rent actually owed under the lease. Therefore, our claim for unpaid rent would likely not be paid in full. Any losses resulting from the bankruptcy of any of our existing tenants could adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

A large percentage of our tenants operate in a concentrated group of industries and downturns in these industries could adversely affect our financial condition, results of operations and cash flows. As of December 31, 2019, as a percentage of our annualized base rental revenue for the stabilized portfolio, 51% of our tenants operated in the technology industry, 15% in the life science and health care industries, 13% in the media industry, 8% in the finance, insurance and real estate industries, 5% in the professional, business and other services industries and 8% in other industries. As we continue our development and potential acquisition activities in markets populated by knowledge and creative based tenants in the technology and media industries, our tenant mix could become more concentrated, further exposing us to risks associated with those industries. For a further discussion of the composition of our tenants by industry, see “Item 2. Properties —Significant Tenants.” An economic downturn in any of these industries, or in any industry in which a significant number of our tenants currently or may in the future operate, could negatively impact the financial condition of such tenants and cause them to fail to make timely rental payments or default on lease obligations, fail to renew their leases or renew their leases on terms less favorable to us, become bankrupt or insolvent, or otherwise become unable to satisfy their obligations to us. As a result, a downturn in an industry in which a significant number of our tenants operate could adversely affect our financial conditions, result of operations and cash flows.

We may be unable to renew leases or re-lease available space. Most of our income is derived from the rent earned from our tenants. We had office space representing approximately 5.4% of the total square footage of our stabilized office properties that was not occupied as of December 31, 2019. In addition, leases representing approximately 7.7% and 6.8% of the leased rentable square footage of our properties are scheduled to expire in 2020 and 2021, respectively. Of the leases scheduled to expire in 2020 and 2021, 28% and 21% of the rentable square footage scheduled to expire was re-leased, respectively, as of December 31, 2019. Above market rental rates on some of our properties may force us to renew or re-lease expiring leases at rates below current lease rates. We cannot provide any assurance that leases will be renewed, available space will be re-leased or that our rental rates will be equal to or above the current rental rates. If the average rental rates for our properties decrease, existing tenants do not renew their leases, or available space is not re-leased, our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders could be adversely affected. For additional information on our scheduled lease expirations, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors That May Influence Future Results of Operations.”

We are subject to governmental regulations that may affect the development, redevelopment and use of our properties. Our properties are subject to regulation under federal laws, such as the Americans with Disabilities Act of 1990 (the “ADA”), pursuant to which all public accommodations must meet federal requirements related to access and use by disabled persons, and state and local laws addressing earthquake, fire and life safety requirements. Although we believe that our properties substantially comply with requirements under applicable governmental regulations, none of our properties have been audited or investigated for compliance by any regulatory agency. If we were not in compliance with material provisions of the ADA or other regulations affecting our properties, we might be required to take remedial action, which could include making modifications or renovations to our properties. Federal, state, or local governments may also enact future laws and regulations that could require us to make significant modifications or renovations to our properties. If we were to incur substantial costs to comply with the ADA or any other regulations, our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders could be adversely affected.

Our properties are subject to land use rules and regulations that govern our development, redevelopment and use of our properties, such as Title 24 of the California Code of Regulations (“Title 24”), which prescribes building energy efficiency standards for residential and nonresidential buildings in the State of California. If we were not in compliance with material provisions of Title 24 or other regulations affecting our properties, we might be required to take remedial action, which could include making modifications or renovations to our properties. Changes in the existing land use rules and regulations and approval process that restrict or delay our ability to develop, redevelop or use our properties

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(such as potential restrictions on the use and/or density of new developments, water use and other uses and activities) or that prescribe additional standards could have an adverse effect on our financial position, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

We may not be able to meet our debt service obligations. As of December 31, 2019, we had approximately $3.6 billion aggregate principal amount of indebtedness, of which $5.1 million in principal payments will be paid during the year ended December 31, 2020. Our total debt at December 31, 2019 represented 28.3% of our total market capitalization (which we define as the aggregate of our long-term debt and the market value of the Company’s common stock and the Operating Partnership’s common units of limited partnership interest, or common units, based on the closing price per share of the Company’s common stock as of that date). For the calculation of our market capitalization and additional information on debt maturities, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Company —Capitalization” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Operating Partnership —Liquidity Uses.”

Our ability to make payments on and to refinance our indebtedness and to fund our operations, working capital, and capital expenditures, depends on our ability to generate cash flow in the future. Our cash flow is subject to general economic, industry, financial, competitive, operating, legislative, regulatory, environmental and other factors, many of which are beyond our control.

The instruments and agreements governing some of our outstanding indebtedness (including borrowings under the Operating Partnership’s unsecured revolving credit facility, unsecured term loan facility and note purchase agreements) contain provisions that require us to repurchase for cash or repay that indebtedness under specified circumstances or upon the occurrence of specified events (including upon the acquisition by any person or group of more than a specified percentage of the aggregate voting power of all the Company’s issued and outstanding voting stock, upon certain changes in the composition of a majority of the members of the Company’s board of directors, if the Company or one of its wholly-owned subsidiaries ceases to be the sole general partner of the Operating Partnership or if the Company ceases to own, directly or indirectly, at least 60% of the voting equity interests in the Operating Partnership), and our future debt agreements and debt securities may contain similar provisions or may require that we repay or repurchase or offer to repurchase for cash the applicable indebtedness under specified circumstances or upon the occurrence of specified changes of control of the Company or the Operating Partnership or other events. We may not have sufficient funds to pay our indebtedness when due (including upon any such required repurchase, repayment or offer to repurchase), and we may not be able to arrange for the financing necessary to make those payments or repurchases on favorable terms or at all. In addition, our ability to make required payments on our indebtedness when due (including upon any such required repurchase, repayment or offer to repurchase) may be limited by the terms of other debt instruments or agreements. Our failure to pay amounts due in respect of any of our indebtedness when due would generally constitute an event of default under the instrument governing that indebtedness, which could permit the holders of that indebtedness to require the immediate repayment of that indebtedness in full and, in the case of secured indebtedness, could allow them to sell the collateral securing that indebtedness and use the proceeds to repay that indebtedness. Moreover, any acceleration of or default in respect of any of our indebtedness could, in turn, constitute an event of default under other debt instruments or agreements, thereby resulting in the acceleration and required repayment of that other indebtedness. Any of these events could materially adversely affect our ability to make payments of principal and interest on our indebtedness when due and could prevent us from making those payments altogether.

We cannot assure you that our business will generate sufficient cash flow from operations or that future sources of cash will be available to us in an amount sufficient to enable us to pay amounts due on our indebtedness or to fund our other liquidity needs, including cash distributions to stockholders necessary to maintain the Company’s REIT qualification. Additionally, if we incur additional indebtedness in connection with future acquisitions or for any other purpose, our debt service obligations could increase.

We may need to refinance all or a portion of our indebtedness on or before maturity. Our ability to refinance our indebtedness or obtain additional financing will depend on, among other things:

•our financial condition, results of operations and market conditions at the time; and

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•restrictions in the agreements governing our indebtedness.

As a result, we may not be able to refinance our indebtedness on commercially reasonable terms or at all. If we do not generate sufficient cash flow from operations, and additional borrowings or refinancings or proceeds of asset sales or other sources of cash are not available to us, we may not have sufficient cash to enable us to meet all of our obligations. Accordingly, if we cannot service our indebtedness, we may have to take actions such as seeking additional equity financing, delaying capital expenditures, or entering into strategic acquisitions and alliances. Any of these events or circumstances could have a material adverse effect on our financial condition, results of operations, cash flows, the trading price of our securities and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders. In addition, foreclosures could create taxable income without accompanying cash proceeds, which could require us to borrow or sell assets to raise the funds necessary to pay amounts due on our indebtedness and to meet the REIT distribution requirements discussed below, even if such actions are not on favorable terms.

The covenants in the agreements governing the Operating Partnership’s unsecured revolving credit facility, unsecured term loan facility and note purchase agreements may limit our ability to make distributions to the holders of our common stock. The Operating Partnership’s $750.0 million unsecured revolving credit facility, $150.0 million unsecured term loan facility and note purchase agreements contain financial covenants that could limit the amount of distributions payable by us on our common stock and any preferred stock we may issue in the future. We rely on cash distributions we receive from the Operating Partnership to pay distributions on our common stock and any preferred stock we may issue in the future and to satisfy our other cash needs. The agreements governing the unsecured revolving credit facility, the unsecured term loan facility and the note purchase agreements provide that, if the Operating Partnership fails to pay any principal of, or interest on, any borrowings or other amounts payable under such agreement when due or during any other event of default under such revolving credit facility, loan facility and the unsecured private placement notes, the Operating Partnership may make only those partnership distributions that result in distributions to us in an amount sufficient to permit us to make distributions to our stockholders that we reasonably believe are necessary to (a) maintain our qualification as a REIT for federal and state income tax purposes and (b) avoid the payment of federal or state income or excise tax. Any limitation on our ability to make distributions to our stockholders, whether as a result of these provisions in the unsecured revolving credit facility, the unsecured term loan facility, the note purchase agreements or otherwise, could have a material adverse effect on the market value of our common stock.

A downgrade in our credit ratings could materially adversely affect our business and financial condition. The credit ratings assigned to the Operating Partnership’s debt securities and any preferred stock we may issue in the future could change based upon, among other things, our results of operations and financial condition. These ratings are subject to ongoing evaluation by credit rating agencies, and we cannot assure you that any rating will not be changed or withdrawn by a rating agency in the future if, in its judgment, circumstances warrant. Moreover, these credit ratings do not apply to our common stock and are not recommendations to buy, sell or hold our common stock or any other securities. If any of the credit rating agencies that have rated the Operating Partnership’s debt securities or any preferred stock we may issue in the future downgrades or lowers its credit rating, or if any credit rating agency indicates that it has placed any such rating on a so-called “watch list” for a possible downgrading or lowering or otherwise indicates that its outlook for that rating is negative, it could have a material adverse effect on our costs and availability of capital, which could in turn have a material adverse effect on our financial condition, results of operations, cash flows, the trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

We face significant competition, which may decrease the occupancy and rental rates of our properties. We compete with several developers, owners and operators of office, undeveloped land and other commercial real estate, including mixed-use and residential real estate, many of which own properties similar to ours in the same submarkets in which our properties are located but which have lower occupancy rates than our properties. Therefore, our competitors have an incentive to decrease rental rates until their available space is leased. If our competitors offer space at rental rates below the rates currently charged by us for comparable space, we may be pressured to reduce our rental rates below those currently charged in order to retain tenants when our tenant leases expire. As a result, our financial condition, results of operations, cash flow, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders may be adversely affected.

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In order to maintain the quality of our properties and successfully compete against other properties, we must periodically spend money to maintain, repair and renovate our properties, which reduces our cash flows. If our properties are not as attractive to current and prospective tenants in terms of rent, services, condition or location as properties owned by our competitors, we could lose tenants or suffer lower rental rates. As a result, we may from time to time be required to make significant capital expenditures to maintain the competitiveness of our properties. There can be no assurances that any such expenditure would result in higher occupancy or higher rental rates, or deter existing tenants from relocating to properties owned by our competitors.

Potential casualty losses, such as earthquake losses, may adversely affect our financial condition, results of operations and cash flows. We carry comprehensive liability, fire, extended coverage, rental loss, and terrorism insurance covering all of our properties. Management believes the policy specifications and insured limits are appropriate given the relative risk of loss, the cost of the coverage and industry practice. We do not carry insurance for generally uninsurable losses such as loss from riots or acts of God. In addition, all of our properties are located in earthquake-prone areas. We carry earthquake insurance on our properties in an amount and with deductibles that management believes are commercially reasonable. However, the amount of our earthquake insurance coverage may not be sufficient to cover losses from earthquakes. We may also discontinue earthquake insurance on some or all of our properties in the future if the cost of premiums for earthquake insurance exceeds the value of the coverage discounted for the risk of loss. If we experience a loss that is uninsured or which exceeds policy limits, we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those properties. Further, if the damaged properties are subject to recourse indebtedness, we would continue to be liable for the indebtedness, even if the properties were irreparable.

We may not be able to rebuild our existing properties to their existing specifications if we experience a substantial or comprehensive loss of such properties. In the event that we experience a substantial or comprehensive loss of one of our properties, we may not be able to rebuild such property to its existing specifications. Further, reconstruction or improvement of such property could potentially require significant upgrades to meet zoning and building code requirements or be subject to environmental and other legal restrictions.

Our business is subject to risks associated with climate change and our sustainability strategies. Climate change could trigger extreme weather and changes in precipitation, temperature, and air quality, all of which may result in physical damage to, or a decrease in demand for, our properties located in the areas affected by these conditions. Should the impact of climate change be severe or occur for lengthy periods of time, our financial condition or results of operations would be adversely affected.

Recognizing the importance of climate change and reducing our greenhouse gas impact on the environment, our sustainability strategies include a commitment to achieving carbon neutral operations by December 31, 2020. This means that the entirety of our scope 1 and scope 2 emissions will be offset by this date through a combination of energy efficiency measures and both onsite and offsite renewables. Scope 1 emissions represent those produced by onsite natural gas consumption procured by us, and Scope 2 emissions represent those produced by onsite electricity consumption procured by us. Our own efforts to reduce our greenhouse gas impact on the environment and/or comply with changes in federal and state laws and regulations on climate change could result in significant capital expenditures to improve the energy efficiency of our existing properties or properties we may acquire. Changes to such law and regulations could also result in increased operating costs at our properties (for example, through increased utility costs). Moreover, if we are unable to achieve carbon neutral operations by our targeted date or comply with laws and regulations on climate change, our reputation among our tenants and investors may be damaged and we may incur fines and/or penalties.

Our properties are located in West Coast markets of the United States. To the extent that climate change impacts changes in weather patterns, our markets could experience increases in extreme weather and rising sea levels. For example, many of our assets are in zones that have been impacted by drought and, as such, face the risk of increased water costs and potential fines and/or penalties for high consumption.  We endeavor to mitigate these risks through comprehensive, proactive water reduction efforts throughout our portfolio, including domestic fixture upgrades, cooling tower optimizations, a comprehensive leak detection program and irrigation systems retrofits. We also incorporate green lease language into 100% of our new leases, including a cost recover clause for resource-efficiency related capital expenditures in full-service gross leases, which aim to align our and our tenant’s interests on energy, water and waste efficiency.  In addition, we are building our current development projects to LEED specifications, and all of our office

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development projects are now designed to achieve LEED certification, either LEED Platinum or Gold.  However, there can be no assurances that we will successfully mitigate the risk of increased water costs and potential fines and/or penalties for high consumption or that we will be able to fully recoup any capital expenditures we incur in connection with our green leases.  Moreover, there can be no assurance that our development projects will be able to achieve the anticipated LEED certifications or that any of our sustainability strategies will result in reduced operating costs, higher occupancy or higher rental rates or deter our existing tenants from relocating to properties owned by our competitors. Over time, these conditions could result in declining demand for space at our properties or in our inability to operate the buildings as currently intended or at all. Climate change may also have indirect effects on our business by increasing the cost of, or decreasing the availability of, property insurance on terms we find acceptable or at all, or by increasing the cost of energy or water. There can be no assurance that climate change will not have a material adverse effect on our properties, operations or business.

We are subject to environmental and health and safety laws and regulations, and any costs to comply with, or liabilities arising under, such laws and regulations could be material. As an owner, operator, manager, acquirer and developer of real properties, we are subject to environmental and health and safety laws and regulations. Certain of these laws and regulations impose joint and several liability, without regard to fault, for investigation and clean-up costs on current and former owners and operators of real property and persons who have disposed of or released hazardous substances into the environment. At some of our properties, there are asbestos-containing materials, or tenants routinely handle hazardous substances as part of their operations. In addition, historical operations and conditions, including the presence of underground storage tanks, various site uses that involved hazardous substances, the landfilling of hazardous substances and solid waste, and migration of contamination from other sites, have caused soil or groundwater contamination at or near some of our properties. Although we believe that the prior owners of the affected properties or other persons may have conducted remediation of known contamination at many of these properties, not all such contamination has been remediated, further clean-up or environmental closure activities at certain of these properties is or may be required, and residual contamination could pose environmental, health, and safety risks if not appropriately addressed. We may need to investigate or remediate contaminated soil, soil gas, landfill gas, and groundwater, and we may also need to conduct landfill closure and post-closure activities, including, for example, the implementation of groundwater and methane monitoring systems and impervious cover, and the costs of such work could exceed projected or budgeted amounts. To protect the health and safety of site occupants and others, we may be required to implement and operate safeguards, including, for example, vapor intrusion mitigation systems and building protection systems to address methane. We may need to modify our methods of construction or face increased construction costs as a result of environmental conditions, and we may face obligations under agreements with governmental authorities with respect to the management of such environmental conditions. If releases from our sites migrate offsite, or if our site redevelopment activities cause or contribute to a migration of hazardous substances, neighbors or others could make claims against us, such as for property damage, personal injury, cost recovery, or natural resources damage. As of December 31, 2019, we had accrued environmental remediation liabilities of approximately $80.7 million recorded on our consolidated balance sheets in connection with certain of our in-process and future development projects. The accrued environmental remediation liabilities represent the costs we estimate we will incur when we commence development at various development acquisition sites. These estimates, which we developed with the assistance of third party experts, consist primarily of the removal of contaminated soil, performing environmental closure activities, construction remedial systems, and other related costs since we are required to dispose of any existing contaminated soil, and sometimes perform other environmental closure or remedial activities, when we develop new office properties as these sites. It is possible that we could incur additional environmental remediation costs in connection with future development projects. However, potential additional environmental costs cannot be reasonably estimated at this time and certain changes in estimates could occur as the site conditions, final project timing, design elements, actual soil conditions and other aspects of the projects, which may depend upon municipal and other approvals beyond the control of the Company, are determined. Unknown or unremediated contamination or compliance with existing or new environmental or health and safety laws and regulations could require us to incur costs or liabilities that could be material. See “Item 1. Business —Environmental Regulations and Potential Liabilities” and Note 18 “Commitments and Contingencies” to our consolidated financial statements included in this report.

We may be unable to complete acquisitions and successfully operate acquired properties. We continually evaluate the market of available properties and may continue to acquire office or mixed-use properties and undeveloped land when strategic opportunities exist. Our ability to acquire properties on favorable terms and successfully operate them is subject to various risks, including the following:

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• we may potentially be unable to acquire a desired property because of competition from other real estate investors with significant capital, including both publicly traded and private REITs, institutional investment funds and other real estate investors;

• even if we are able to acquire a desired property, competition from other real estate investors may significantly increase the purchase price;

• even if we enter into agreements for the acquisition of a desired property, we may be unable to complete such acquisitions because they remain subject to customary conditions to closing, including the completion of due diligence investigations to management’s satisfaction;

• we may be unable to finance acquisitions on favorable terms or at all;

• we may spend more than budgeted amounts in operating costs or to make necessary improvements or renovations to acquired properties;

• we may lease acquired properties at economic lease terms different than projected;

• we may acquire properties that are subject to liabilities for which we may have limited or no recourse; and

• we may be unable to complete an acquisition after making a nonrefundable deposit and incurring certain other acquisition-related costs.

If we cannot finance property acquisitions on favorable terms or operate acquired properties to meet financial expectations, our financial condition, results of operations, cash flows, the quoted trading price of our securities and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders could be adversely affected.

There are significant risks associated with property acquisition, development and redevelopment. We may be unable to successfully complete and operate acquired, developed and redeveloped properties, and it is possible that:

• we may be unable to lease acquired, developed or redeveloped properties on lease terms projected at the time of acquisition, development or redevelopment or within budgeted timeframes;

• the operating expenses at acquired, developed or redeveloped properties may be greater than projected at the time of acquisition, development or redevelopment, resulting in our investment being less profitable than we expected;

• we may not commence or complete development or redevelopment properties on schedule or within budgeted amounts or at all;

• we may not be able to develop or redevelop the estimated square footage and other features of our development and redevelopment properties;

• we may suspend development or redevelopment projects after construction has begun due to changes in economic conditions or other factors, and this may result in the write-off of costs, payment of additional costs or increases in overall costs when the development or redevelopment project is restarted;

• we may expend funds on and devote management’s time to acquisition, development or redevelopment properties that we may not complete and as a result we may lose deposits or fail to recover expenses already incurred;

• we may encounter delays or refusals in obtaining all necessary zoning, land use, and other required entitlements, and building, occupancy, and other required governmental permits and authorizations;

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• we may encounter delays or unforeseen cost increases associated with building materials or construction services resulting from trade tensions, disruptions, tariffs, duties or restrictions or an outbreak of an epidemic or pandemic;

• we may encounter delays, refusals, unforeseen cost increases and other impairments resulting from third-party litigation; and

• we may fail to obtain the financial results expected from properties we acquire, develop or redevelop.

If one or more of these events were to occur in connection with our acquired properties, undeveloped land, or development or redevelopment properties under construction, we could be required to recognize an impairment loss. These events could also have an adverse impact on our financial condition, results of operations, cash flow, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

While we historically have acquired, developed and redeveloped office properties in California markets, over the past few years we have acquired properties in greater Seattle, where we currently have eight properties, one development project under construction and one recently acquired future development project, and may in the future acquire, develop or redevelop properties for other uses and expand our business to other geographic regions where we expect the development or acquisition of property to result in favorable risk-adjusted returns on our investment. Presently, we do not possess the same level of familiarity with other outside markets, which could adversely affect our ability to acquire, develop or redevelop properties or to achieve expected performance.

We face risks associated with the development of mixed-use commercial properties. We are currently developing, and in the future may develop, properties either alone or through joint ventures that are known as “mixed-use” developments. This means that in addition to the development of office space, the project may also include space for residential, retail or other commercial purposes. Generally, we have less experience developing and managing non-office real estate. As a result, if a development project includes non-office space, we may develop that space ourselves or seek to partner with a third-party developer with more experience. If we do not partner with such a developer, or if we choose to develop the space ourselves, we would be exposed to specific risks associated with the development and ownership of non-office real estate. In addition, if we elect to participate in the development through a joint venture, we may be exposed to the risks associated with the failure of the other party to complete the development as expected, which could require that we identify another joint venture partner and/or complete the project ourselves (including providing any necessary financing). In the case of residential properties, these risks include competition for prospective tenants from other operators whose properties may be perceived to offer a better location or better amenities or whose rent may be perceived as a better value given the quality, location and amenities that the tenant seeks. With residential properties, we will also compete against apartments, condominiums and single-family homes that are for sale or rent. Because we have less experience with residential properties, we may retain third parties to manage these properties. If we decide to wholly own a non-office project and hire a third-party manager, we could be dependent on that party and its key personnel to provide services to us, and we may not find a suitable replacement if the management agreement is terminated, or if key personnel leave or otherwise become unavailable to us.

Joint venture investments could be adversely affected by our lack of sole decision-making authority, our reliance on co-venturers' financial condition, and disputes between us and our co-venturers and could expose us to potential liabilities and losses. In addition to the 100 First LLC and 303 Second LLC strategic ventures and the Redwood City Partners, LLC venture, we may continue to co-invest in the future with third parties through partnerships, joint ventures or other entities, or through acquiring non-controlling interests in, or sharing responsibility for, managing the affairs of a property, partnership, joint venture or other entity, which may subject us to risks that may not be present with other methods of ownership, including the following:

• we would not be able to exercise sole decision-making authority regarding the property, partnership, joint venture or other entity, which would allow for impasses on decisions that could restrict our ability to sell or transfer our interests in such entity or such entity’s ability to transfer or sell its assets;

• partners or co-venturers might become bankrupt or fail to fund their share of required capital contributions, which could delay construction or development of a property or increase our financial commitment to the

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partnership or joint venture;

• partners or co-venturers may pursue economic or other business interests, policies or objectives that are competitive or inconsistent with ours;

• if we become a limited partner or non-managing member in any partnership or limited liability company, and such entity takes or expects to take actions that could jeopardize our status as a REIT or require us to pay tax, we may be forced to dispose of our interest in such entity;

• disputes between us and partners or co-venturers may result in litigation or arbitration that would increase our expenses and prevent our officers and/or directors from focusing their time and effort on our business; and

• we may, in certain circumstances, be liable for the actions of our third-party partners or co-venturers.

We own certain properties subject to ground leases and other restrictive agreements that limit our uses of the properties, restrict our ability to sell or otherwise transfer the properties and expose us to the loss of the properties if such agreements are breached by us, terminated or not renewed. As of December 31, 2019, we owned fourteen office buildings, located on various land parcels and in various regions, which we lease individually on a long-term basis. As of December 31, 2019, we had approximately 2.0 million aggregate rentable square feet, or 15.2% of our total stabilized portfolio, of rental space located on these leased parcels and we may in the future invest in additional properties that are subject to ground leases or other similar restrictive arrangements. Many of these ground leases and other restrictive agreements impose significant limitations on our uses of the subject property, restrict our ability to sell or otherwise transfer our interests in the property or restrict our leasing of the property. These restrictions may limit our ability to timely sell or exchange the properties, impair the properties’ value or negatively impact our ability to find suitable tenants for the properties. In addition, if we default under the terms of any particular lease, we may lose the ownership rights to the property subject to the lease. Upon expiration of a lease, we may not be able to renegotiate a new lease on favorable terms, if at all. The loss of the ownership rights to these properties or an increase of rental expense could have an adverse effect on our financial condition, results of operations, cash flow, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

Real estate assets are illiquid, and we may not be able to sell our properties when we desire. Our investments in our properties are relatively illiquid, limiting our ability to sell our properties quickly in response to changes in economic or other conditions. In addition, the Code generally imposes a 100% prohibited transaction tax on the Company on profits derived from sales of properties held primarily for sale to customers in the ordinary course of business, which effectively limits our ability to sell properties other than on a selected basis. These restrictions on our ability to sell our properties could have an adverse effect on our financial condition, results of operations, cash flow, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

We may invest in securities related to real estate, which could adversely affect our ability to pay dividends and distributions to our security holders. We may purchase securities issued by entities that own real estate and may, in the future, also invest in mortgages. In general, investments in mortgages are subject to several risks, including:

• borrowers may fail to make debt service payments or pay the principal when due;

• the value of the mortgaged property may be less than the principal amount of the mortgage note securing the property; and

• interest rates payable on the mortgages may be lower than our cost for the funds used to acquire these mortgages.

Owning these securities may not entitle us to control the ownership, operation and management of the underlying real estate. In addition, we may have no control over the distributions with respect to these securities, which could adversely affect our ability to pay dividends and distributions to our security holders.

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We face risks associated with short-term liquid investments. From time to time, we have significant cash balances that we invest in a variety of short-term investments that are intended to preserve principal value and maintain a high degree of liquidity while providing current income. These investments may include (either directly or indirectly):

• direct obligations issued by the U.S. Treasury;

• obligations issued or guaranteed by the U.S. government or its agencies;

• taxable municipal securities;

• obligations (including certificates of deposits) of banks and thrifts;

• commercial paper and other instruments consisting of short-term U.S. dollar denominated obligations issued by corporations and banks;

• repurchase agreements collateralized by corporate and asset-backed obligations;

• both registered and unregistered money market funds; and

• other highly rated short-term securities.

Investments in these securities and funds are not insured against loss of principal. Under certain circumstances we may be required to redeem all or part of our investment, and our right to redeem some or all of our investment may be delayed or suspended. In addition, there is no guarantee that our investments in these securities or funds will be redeemable at par value. A decline in the value of our investment or a delay or suspension of our right to redeem may have a material adverse effect on our results of operations or financial condition.

Future terrorist activity or engagement in war by the United States may have an adverse effect on our financial condition and operating results. Terrorist attacks in the United States and other acts of terrorism or war, may result in declining economic activity, which could harm the demand for and the value of our properties. In addition, the public perception that certain locations are at greater risk for attack, such as major airports, ports and rail facilities, may decrease the demand for and the value of our properties near these sites. A decrease in demand could make it difficult for us to renew or re-lease our properties at these sites at lease rates equal to or above historical rates. Terrorist activities also could directly impact the value of our properties through damage, destruction, or loss, and the availability of insurance for these acts may be less, and cost more, which could adversely affect our financial condition. To the extent that our tenants are impacted by future attacks, their businesses similarly could be adversely affected, including their ability to continue to honor their existing leases.

Terrorist acts and engagement in war by the United States also may adversely affect the markets in which our securities trade and may cause further erosion of business and consumer confidence and spending, and may result in increased volatility in national and international financial markets and economies. Any one of these events may cause a decline in the demand for our office leased space, delay the time in which our new or renovated properties reach stabilized occupancy, increase our operating expenses, such as those attributable to increased physical security for our properties, and limit our access to capital or increase our cost of raising capital.

The enactment of the Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”) will subject us to substantial additional federal regulation. There are significant corporate governance and executive compensation-related requirements that have been, and will in the future be, imposed on publicly-traded companies under the Dodd-Frank Act. Several of these provisions require the SEC to adopt additional rules and regulations in these areas. For example, the Dodd-Frank Act requires publicly-traded companies to give stockholders a non-binding vote on executive compensation and so-called “golden parachute” payments. Our efforts to comply with these requirements have resulted in, and are likely to continue to result in, an increase in expenses and a diversion of management’s time from other business activities. In addition, if stockholders do not vote to approve our executive compensation practices and/or our equity plan amendments, these actions may interfere with our ability to attract and retain key personnel who are essential to our future success. Provisions of the Dodd-Frank Act that directly affect other participants in the real estate and capital markets, such as banks, investment funds and interest rate hedge providers,

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could also have indirect, but material, impacts on our business that cannot now be predicted.  In addition, in February 2017, the U.S. President ordered the Secretary of the U.S. Treasury to review certain existing rules and regulations, such as those promulgated under the Dodd-Frank Act; however, the implications of that review are not yet known and none of the rules and regulations promulgated under the Dodd-Frank Act have been modified or rescinded as of the date of this report. Given the uncertainty associated with both the results of the existing Dodd-Frank Act requirements and the manner in which additional provisions of the Dodd-Frank Act will be implemented by various regulatory agencies and through regulations, the full extent of the impact of such requirements on our operations is unclear. Accordingly, the changes resulting from the Dodd-Frank Act may impact the profitability of business activities, require changes to certain business practices, or otherwise adversely affect our financial condition, results of operations, cash flows, the quoted trading price of our securities and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

Our property taxes could increase due to reassessment or property tax rate changes. We are required to pay state and local taxes on our properties. In addition, the real property taxes on our properties may increase as our properties are reassessed by taxing authorities or as property tax rates change. For example, under a current California law commonly referred to as “Proposition 13,” property tax reassessment generally occurs as a result of a “change in ownership” of a property, as specifically defined for purposes of those rules. Because the property taxing authorities may not determine whether there has been a “change in ownership” or the actual reassessed value of a property for a period of time after a transaction has occurred, we may not know the impact of a potential reassessment for a considerable amount of time following a particular transaction or construction of a new property. Therefore, the amount of property taxes we are required to pay could increase substantially from the property taxes we currently pay or have paid in the past, including on a retroactive basis. In addition, from time to time voters and lawmakers have announced initiatives to repeal or amend Proposition 13 to eliminate its application to commercial property and/or introduce split tax roll legislation. Such initiatives, if successful, would increase the assessed value and/or tax rates applicable to commercial property in California, including our properties. An increase in the assessed value of our properties or our property tax rates could adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

Unfavorable resolution of litigation matters and disputes could have a material adverse effect on our financial condition. From time to time, we are involved in legal proceedings, lawsuits and other claims. We may also be named as defendants in lawsuits allegedly arising out of our actions or the actions of our operators, vendors, contractors, tenants or other contractual parties in which such parties have agreed to indemnify, defend and hold us harmless from and against various claims, litigation and liabilities arising in connection with their respective businesses and/or added as an additional insured under certain insurance policies. An unfavorable resolution of any legal proceeding, lawsuit or other claim could have a negative effect on our financial condition, results of operations, cash flow and the quoted trading price of our securities. Regardless of its outcome, legal proceedings, lawsuits and other claims may result in substantial costs and expenses and significantly divert the attention of our management. There can be no assurance that we will be able to prevail or achieve a favorable settlement or outcome. There can also be no assurance that our insurance or the insurance and/or any contractual indemnities of our operators, vendors, contractors, tenants or other contractual parties will be enough to cover all of our defense costs or any resulting liabilities. In addition, litigation, government proceedings or environmental matters could lead to increased costs or interruption of our normal business operations.

Our business could be adversely impacted if there are deficiencies in our disclosure controls and procedures or internal control over financial reporting. The design and effectiveness of our disclosure controls and procedures and internal control over financial reporting may not prevent all errors, misstatements or misrepresentations. While management will continue to review the effectiveness of our disclosure controls and procedures and internal control over financial reporting, there can be no guarantee that our internal control over financial reporting will be effective in accomplishing all control objectives all of the time. Deficiencies, including any material weakness, in our internal control over financial reporting that may occur in the future could result in misstatements of our results of operations, restatements of our financial statements, or otherwise adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

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We face risks associated with security breaches through cyber attacks, cyber intrusions or otherwise, as well as other significant disruptions of our information technology (IT) networks and related systems. We face risks associated with security breaches, whether through cyber attacks or cyber intrusions over the Internet, malware, computer viruses, attachments to e-mails, persons inside our organization or persons with access to systems inside our organization, and other significant disruptions of our IT networks and related systems. The risk of a security breach or disruption, particularly through cyber attack or cyber intrusion, including by computer hackers, foreign governments and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased. Our IT networks and related systems are essential to the operation of our business and our ability to perform day-to-day operations (including managing our building systems), and, in some cases, may be critical to the operations of certain of our tenants. There can be no assurance that our efforts to maintain the security and integrity of these types of IT networks and related systems will be effective or that attempted security breaches or disruptions would not be successful or damaging. Like other businesses, we have been and expect to continue to be subject to unauthorized access, mishandling or misuse, computer viruses or malware, cyber attacks and other events of varying degrees. Historically, these events have not adversely affected our operations or business and were not individually or in the aggregate material.

However, in the future, events such as these or other significant disruptions involving our IT networks and related systems could, among other things:

• result in unauthorized access to, destruction, loss, theft, misappropriation or release of proprietary, confidential, sensitive or otherwise valuable information of ours or others, including personally identifiable and account information that could be used to compete against us or for disruptive, destructive or otherwise harmful purposes and outcomes;

• result in unauthorized access to or changes to our financial accounting and reporting systems and related data;

• result in the theft of funds;

• result in our inability to maintain building systems relied on by our tenants;

• require significant management attention and resources to remedy any damage that results;

• subject us to regulatory penalties or claims for breach of contract, damages, credits, penalties or terminations of leases or other agreements; or

• damage our reputation among our tenants and investors.

These events could have an adverse impact on our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

An increase in interest rates could increase our interest costs on variable rate debt and new debt and could adversely affect our ability to refinance existing debt, conduct development, redevelopment and acquisition activity and recycle capital. As of December 31, 2019, we had an unsecured revolving credit facility and an unsecured term loan facility bearing interest at variable rates on any amounts drawn and outstanding. These facilities comprised approximately 11.0% of our total outstanding debt at December 31, 2019 and were subject to variable interest rates and therefore subject to interest rate risk. In addition, we may incur additional variable rate debt in the future. If interest rates increase, so could our interest costs for any variable rate debt and for new debt. This increased cost could make the financing of any development, redevelopment and acquisition activity costlier. Rising interest rates could also limit our ability to refinance existing debt when it matures or cause us to pay higher interest rates upon refinancing and increase interest expense on refinanced indebtedness. In addition, an increase in interest rates could decrease the amount third parties are willing to pay for our assets, thereby limiting our ability to recycle capital and our portfolio promptly in response to changes in economic or other conditions.

We manage a portion of our exposure to interest rate risk by accessing debt with staggered maturities, and we may in the future mitigate this risk through the use of derivative instruments, including interest rate swap agreements or

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other interest rate hedging agreements, including swaps, caps and floors. While these agreements are intended to lessen the impact of rising interest rates on us, they also expose us to the risks that counter parties may fail to honor their obligations, that we could incur significant costs associated with the settlement of these agreements, that the amount of income we earn from hedging transactions may be limited by federal tax provisions governing REITs, that these agreements may cause us to pay higher interest rates on our debt obligations than would otherwise be the case and that underlying transactions could fail to qualify as highly-effective cash flow hedges under the accounting guidance. As a result, failure to hedge effectively against interest rate risk, if we choose to engage in such activities, could adversely affect our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

The trading price of our common stock may fluctuate significantly. The trading price of our common stock may fluctuate significantly. Between January 1, 2019 and February 7, 2020, the closing sale price of Company’s common stock on the New York Stock Exchange, or the NYSE, ranged from a low of $61.44 to a high of $85.25 per share. The trading price of our common stock may fluctuate in response to many factors, including:

• actual or anticipated variations in our operating results, funds from operations, cash flows, liquidity or distributions;

• our ability to successfully execute on our development plans;

• our ability to successfully complete acquisitions and operate acquired properties;

• earthquakes;

• changes in our earnings estimates or those of analysts;

• publication of research reports about us, the real estate industry generally or the office and residential sectors in which we operate;

• the failure to maintain our current credit ratings or comply with our debt covenants;

• increases in market interest rates;

• changes in market valuations of similar companies;

• adverse market reaction to any debt or equity securities we may issue or additional debt we incur in the future;

• additions or departures of key management personnel;

• actions by institutional investors;

• speculation in the press or investment community;

• high levels of volatility in the credit or equity markets;

• general market and economic conditions; and

• the realization of any of the other risk factors included in this report.

Many of the factors listed above are beyond our control. These factors may cause the trading price of our common stock to decline, regardless of our financial condition, results of operations, business or prospects. We cannot assure you that the trading price of our common stock or the amount of dividends we pay on our common stock will not decline in the future, and it may be difficult for investors to resell shares of our common stock at prices they find attractive, or at all.

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Changes in accounting pronouncements could adversely affect our operating results, in addition to the reported financial performance of our tenants. Uncertainties posed by various initiatives of accounting standard-setting by the Financial Accounting Standards Board (“FASB”) and the SEC, which establish and govern accounting standards for U.S. companies, may change the financial accounting and reporting standards or their interpretation and application of these standards that govern the preparation of our financial statements, including the adoption of the lease accounting standard.

Proposed and/or future changes in accounting standards could have a material impact on our reported financial condition and results of operations. In some cases, we could be required to apply a new or revised standard retroactively, resulting in potentially material restatements of prior period financial statements. Similarly, these changes could have a material impact on our tenants’ reported financial condition or results of operations or could impact our tenants’ business decisions in leasing real estate.

We face risks associated with our tenants and contractual counterparties being designated “Prohibited Persons” by the Office of Foreign Assets Control. Pursuant to Executive Order 13224 and other laws, the Office of Foreign Assets Control of the United States Department of the Treasury (“OFAC”) maintains a list of persons designated as terrorists or who are otherwise blocked or banned (“Prohibited Persons”). OFAC regulations and other laws prohibit conducting business or engaging in transactions with Prohibited Persons (the “OFAC Requirements”). Certain of our loan and other agreements require us to comply with OFAC Requirements. Our leases and other agreements, in general, require the other party to comply with OFAC Requirements. If a tenant or other party with whom we contract is placed on the OFAC list, we may be required by the OFAC Requirements to terminate the lease or other agreement. Any such termination could result in a loss of revenue or a damage claim by the other party that the termination was wrongful.

The actual density of our undeveloped land holdings and/or any particular land parcel may not be consistent with our potential density estimates. As of December 31, 2019, we estimate that our five future development sites, representing approximately 61 gross acres of undeveloped land, provide more than 6.0 million square feet of potential density. We caution you not to place undue reliance on the potential density estimates for our undeveloped land holdings and/or any particular land parcel because they are based solely on our estimates, using data currently available to us, and our business plans as of December 31, 2019. The actual density of our undeveloped land holdings and/or any particular land parcel may differ substantially from our estimates based on numerous factors, including our inability to obtain necessary zoning, land use and other required entitlements, as well as building, occupancy and other required governmental permits and authorizations, and changes in the entitlement, permitting and authorization processes that restrict or delay our ability to develop, redevelop or use undeveloped land holdings at anticipated density levels. Moreover, we may strategically choose not to develop, redevelop or use our undeveloped land holdings to their maximum potential density or may be unable to do so as a result of factors beyond our control, including our ability to obtain capital on terms that are acceptable to us, or at all, to fund our development and redevelopment activities. We can provide no assurance that the actual density of our undeveloped land holdings and/or any particular land parcel will be consistent with our potential density estimates. For additional information on our development program, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors That May Influence Future Results of Operations.”

Loss of our key personnel could harm our operations and financial performance and adversely affect the quoted trading price of our securities. The leadership and performance of our executive and senior officers play a key role in the success of the Company. They are integral to the Company’s success for many reasons, including that each has a strong national or regional reputation in our industry and investment community. In addition, they have significant relationships with investors, lenders, tenants and industry personnel, which benefit the Company.

Risks Related to Our Organizational Structure

Our growth depends on external sources of capital that are outside of our control and the inability to obtain capital on terms that are acceptable to us, or at all, could adversely affect our financial condition and results of operations. The Company is required under the Code to distribute at least 90% of its taxable income (subject to certain adjustments and excluding any net capital gain), and the Operating Partnership is required to make distributions to the Company to allow the Company to satisfy these REIT distribution requirements. Because of these distribution requirements, the Operating Partnership is required to make distributions to the Company, and we may not be able to fund future capital needs, including any necessary acquisition financing, from operating cash flow. Consequently, management relies on

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third-party sources of capital to fund our capital needs. We may not be able to obtain financing on favorable terms or at all. Any additional debt we incur will increase our leverage. Access to third-party sources of capital depends, in part, on general market conditions and the availability of credit, the market’s perception of our growth potential, our current and expected future earnings, our cash flows and cash distributions and the quoted trading price of our securities. If we cannot obtain capital from third-party sources, our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders may be adversely affected.

Our common limited partners have limited approval rights, which may prevent us from completing a change of control transaction that may be in the best interests of all our security holders. The Company may not withdraw as the Operating Partnership’s general partner or transfer its general partnership interest in the Operating Partnership without the approval of the holders of at least 60% of the units representing common limited partnership interests, including the common units held by the Company in its capacity as the Operating Partnership’s general partner. In addition, the Company may not engage in a merger, consolidation or other combination or the sale of substantially all of its assets or such similar transaction, without the approval of the holders of 60% of the common units, including the common units held by the Company in its capacity as the Operating Partnership’s general partner. The right of our common limited partners to vote on these transactions could limit our ability to complete a change of control transaction that might otherwise be in the best interest of all our security holders.

In certain circumstances, our limited partners must approve our dissolution and the disposition of properties contributed by the limited partners. For as long as limited partners own at least 5% of all of the Operating Partnership’s partnership interests, we must obtain the approval of limited partners holding a majority of the units representing common limited partnership interests before we may dissolve. As of December 31, 2019, limited partners owned approximately 1.9% of the Operating Partnership’s partnership interests, of which 0.7% was owned by John Kilroy. In addition, we agreed to use commercially reasonable efforts to minimize the tax consequences to certain common limited partners resulting from the repayment, refinancing, replacement, or restructuring of debt, or any sale, exchange, or other disposition of any of our other assets. The exercise of one or more of these approval rights by the limited partners could delay or prevent us from completing a transaction that may be in the best interest of all our security holders.

The Chairman of our board of directors and our President and Chief Executive Officer has substantial influence over our affairs. John Kilroy is the Chairman of our board of directors and our President and Chief Executive Officer. John Kilroy beneficially owned, as of December 31, 2019, approximately 1.5% of the total outstanding shares of our common stock. The percentage of outstanding shares of common stock beneficially owned includes 274,256 shares of common stock, 499,245 restricted stock units (“RSUs”) that were vested and held by John Kilroy at December 31, 2019, and assumes the exchange into shares of our common stock of the 783,192 common units of the Operating Partnership held by John Kilroy (which may be exchanged for an equal number of shares of our common stock).

Pursuant to the Company’s charter, no stockholder may own, actually or constructively, more than 7.0% (by value or by number of shares, whichever is more restrictive) of our outstanding common stock without obtaining a waiver from the board of directors. The board of directors has waived the ownership limits with respect to John Kilroy, members of his family and some of their affiliated entities. These named individuals and entities may own either actually or constructively, in the aggregate, up to 19.6% of our common stock, excluding Operating Partnership units that are exchangeable into shares of our common stock. Consequently, John Kilroy has substantial influence over the Company, and because the Company is the manager of the Operating Partnership, over the Operating Partnership, and could exercise his influence in a manner that is not in the best interest of our stockholders, noteholders or unitholders. Also, John Kilroy may, in the future, have a substantial influence over the outcome of any matters submitted to our stockholders or unitholders for approval.

There are restrictions on the ownership of the Company’s capital stock that limit the opportunities for a change of control at a premium to existing security holders. Provisions of the Maryland General Corporation Law, the Company’s charter and bylaws and the Operating Partnership’s partnership agreement may delay, deter, or prevent a change of control of the Company, or the removal of existing management. Any of these actions might prevent our security holders from receiving a premium for their shares of common stock or common units over the then-prevailing market price of the shares of our common stock.

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In order for the Company to qualify as a REIT under the Code, its stock must be beneficially owned by 100 or more persons during at least 335 days of a taxable year of 12 months (other than the first year for which an election to be a REIT has been made) or during a proportionate part of a shorter taxable year. Also, not more than 50% of the value of the outstanding shares of the Company’s stock may be owned, actually or constructively, by five or fewer individuals (as defined in the Code to include certain entities) during the last half of a taxable year (other than the first year for which an election to be a REIT has been made). The Company’s charter contains restrictions on the ownership and transfer of its capital stock that are intended to assist the Company in complying with these requirements and continuing to qualify as a REIT. No single stockholder may own, either actually or constructively, absent a waiver from the board of directors, more than 7.0% (by value or by number of shares, whichever is more restrictive) of the Company’s outstanding common stock.

The constructive ownership rules under the Code are complex and may cause stock owned actually or constructively by a group of related individuals and/or entities to be owned constructively by one individual or entity. As a result, the acquisition of less than the applicable ownership limit of a particular class of the Company’s capital stock could, nevertheless, cause that individual or entity, or another individual or entity, to constructively own stock in excess of, and thereby subject such stock to, the applicable ownership limit.

The board of directors may waive the ownership limits if it is satisfied that the excess ownership would not jeopardize the Company’s REIT status and if it believes that the waiver would be in our best interest. The board of directors has waived the ownership limits with respect to John Kilroy, members of his family and some of their affiliated entities. These named individuals and entities may own either actually or constructively, in the aggregate, up to 19.6% of our outstanding common stock, excluding common units that are exchangeable into shares of common stock.

If anyone acquires shares in excess of any ownership limits without a waiver, the transfer to the transferee will be void with respect to the excess shares, the excess shares will be automatically transferred to a trust for the benefit of a qualified charitable organization, and the purported transferee or owner will have no rights with respect to those excess shares.

The Company’s charter contains provisions that may delay, deter or prevent a change of control transaction. The following provisions of the Company’s charter may delay or prevent a change of control over us, even if a change of control might be beneficial to our security holders, deter tender offers that may be beneficial to our security holders, or limit security holders’ opportunity to receive a potential premium for their shares and/or units if an investor attempted to gain shares beyond the Company’s ownership limits or otherwise to effect a change of control:

• the Company’s charter authorizes the board of directors to issue up to 30,000,000 shares of the Company’s preferred stock, including convertible preferred stock, without stockholder approval. The board of directors may establish the preferences, rights and other terms, including the right to vote and the right to convert into common stock any shares issued. The issuance of preferred stock could delay or prevent a tender offer or a change of control even if a tender offer or a change of control was in our security holders’ interest; and

• the Company’s charter states that any director, or the entire board of directors, may be removed from office at any time, but only for cause and then only by the affirmative vote of the holders of at least two thirds of the votes of the Company’s capital stock entitled to be cast in the election of directors.

The board of directors may change investment and financing policies without stockholder or unitholder approval. Our board of directors determines our major policies, including policies and guidelines relating to our acquisition, development and redevelopment activities, leverage, financing, growth, operations, indebtedness, capitalization and distributions to our security holders. Our board of directors may amend or revise these and other policies and guidelines from time to time without stockholder or unitholder approval. Accordingly, our stockholders and unitholders will have limited control over changes in our policies and those changes could adversely impact our financial condition, results of operations, cash flows, the quoted trading price of our securities, and our ability to satisfy our debt service obligations and to pay dividends and distributions to our security holders.

We are not limited in our ability to incur debt. Our financing policies and objectives are determined by the board of directors. Our goal is to limit our dependence on leverage and maintain a conservative ratio of debt to total market capitalization. However, our organizational documents do not limit the amount or percentage of indebtedness, funded

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or otherwise, that we may incur. As of December 31, 2019, we had approximately $3.6 billion aggregate principal amount of indebtedness outstanding, which represented 28.3% of our total market capitalization. See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Company —Capitalization” for a calculation of our market capitalization. These ratios may be increased or decreased without the consent of our unitholders or stockholders. Increases in the amount of debt outstanding would result in an increase in our debt service costs, which could adversely affect cash flow and our ability to pay dividends and distributions to our security holders. Higher leverage also increases the risk of default on our obligations and limits our ability to obtain additional financing in the future.

We may issue additional common units and shares of capital stock without unitholder or stockholder approval, as applicable, which may dilute unitholder or stockholder investment. The Company may issue shares of our common stock, preferred stock or other equity or debt securities without stockholder approval, including the issuance of shares to satisfy REIT dividend distribution requirements. Similarly, the Operating Partnership may offer its common or preferred units for contributions of cash or property without approval by our stockholders or the Operating Partnership’s unitholders. Existing security holders have no preemptive rights to acquire any of these securities, and any issuance of equity securities under these circumstances may dilute a unitholder's or stockholder's investment.

The market price of our common stock may be adversely affected by future offerings of debt and equity securities by us or the Operating Partnership. In the future, we may increase our capital resources by offering our debt securities and preferred stock, the Operating Partnership’s debt securities and equity securities and our or the Operating Partnership’s other borrowings. Upon our liquidation, dissolution or winding-up, holders of such debt securities, our preferred stock and Operating Partnership’s equity securities, and lenders with respect to other borrowings by us and the Operating Partnership, will be entitled to receive distributions of our available assets prior to the holders of our common stock and it is possible that, after making distributions on these other securities and borrowings, no assets would be available for distribution to holders of our common stock. In addition, the Operating Partnership’s debt and equity securities and borrowings are structurally senior to our common stock, our debt securities and borrowings are senior in right of payment to our common stock, and any preferred stock we may issue in the future may have a preference over our common stock, and all payments (including dividends, principal and interest) and liquidating distributions on such securities and borrowings could limit our ability to pay dividends or make other distributions to the holders of our common stock. Because any decision to issue securities and make borrowings in the future will depend on market conditions and other factors, some of which may be beyond our control, we cannot predict or estimate the amount, timing or nature of our or the Operating Partnership’s future offerings or borrowings. Such future offerings or borrowings may reduce the market price of our common stock.

Sales of a substantial number of shares of the Company’s securities, or the perception that this could occur, could result in decreasing the quoted trading price per share of the Company’s common stock and of the Operating Partnership’s publicly-traded notes. Management cannot predict whether future issuances of shares of the Company’s common stock, or the availability of shares for resale in the open market will result in decreasing the market price per share of the Company’s common stock. As of December 31, 2019, 106,016,287 shares of the Company’s common stock were issued and outstanding.

As of December 31, 2019, the Company had reserved for future issuance the following shares of common stock: 2,023,287 shares issuable upon the exchange, at the Company’s option, of the Operating Partnership’s common units; approximately 0.4 million shares remained available for grant under our 2006 Incentive Award Plan (see Note 15 “Share-Based Compensation” to our consolidated financial statements included in this report); approximately 1.6 million shares issuable upon settlement of time-based RSUs; a maximum of 1.6 million shares contingently issuable upon settlement of RSUs subject to the achievement of market and/or performance conditions; and 9,000 shares issuable upon exercise of outstanding options. The Company has a currently effective registration statement registering 9.2 million shares of our common stock for possible issuance under our 2006 Incentive Award Plan. The Company has a currently effective registration statement registering 1,649,760 shares of our common stock for possible issuance to and resale by certain holders of the Operating Partnership’s common units. That registration statement also registers 94,441 shares of common stock held by John Kilroy for possible resale. In addition, as of December 31, 2019, various forward equity sale agreements remain to be settled for 3,147,110 shares of common stock sold by financial institutions acting as forward purchasers. Consequently, if and when the shares are issued, they may be freely traded in the public markets.

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Risks Related to Taxes and the Company’s Status as a REIT

Loss of the Company’s REIT status would have significant adverse consequences to us and the value of the Company’s common stock. The Company currently operates in a manner that is intended to allow it to qualify as a REIT for federal income tax purposes under the Code. If the Company were to lose its REIT status, the Company would face adverse tax consequences that would substantially reduce the funds available for distribution to its stockholders for each of the years involved because:

• the Company would not be allowed a deduction for dividends paid to its stockholders in computing the Company’s taxable income and would be subject to federal income tax at regular corporate rates;

• the Company could be subject to increased state and local taxes; and

• unless entitled to relief under statutory provisions, the Company could not elect to be taxed as a REIT for four taxable years following the year during which the Company was disqualified.

In addition, if the Company failed to qualify as a REIT, it would not be required to make distributions to its stockholders. As a result of all these factors, the Company’s failure to qualify as a REIT also could impair our ability to expand our business and raise capital, and could adversely affect the value and quoted trading price of the Company’s common stock.

Qualification as a REIT involves the application of highly technical and complex Code provisions for which there are only limited judicial and administrative interpretations. The complexity of these provisions and of the applicable Treasury regulations that have been promulgated under the Code is greater in the case of a REIT that, like the Company, holds its assets through a partnership. The determination of various factual matters and circumstances not entirely within our control may affect the Company’s ability to continue to qualify as a REIT. For example, to qualify as a REIT, at least 95% of the Company’s gross income in any year must be derived from qualifying sources. Also, the Company must make distributions to its stockholders aggregating annually at least 90% of the Company’s net taxable income (subject to certain adjustments and excluding any net capital gains). In addition, legislation, new regulations, administrative interpretations or court decisions may adversely affect the Company’s security holders or the Company’s ability to qualify as a REIT for federal income tax purposes or the desirability of an investment in a REIT relative to other investments. Although management believes that we are organized and operate in a manner to permit the Company to continue to qualify as a REIT, we cannot provide assurances that the Company has qualified or will continue to qualify as a REIT for tax purposes. We have not requested and do not plan to request a ruling from the Internal Revenue Service (“IRS”) regarding the Company’s qualification as a REIT.

To maintain the Company’s REIT status, we may be forced to borrow funds during unfavorable market conditions. To qualify as a REIT, the Company generally must distribute to its stockholders at least 90% of the Company’s net taxable income each year (subject to certain adjustments and excluding any net capital gains), and the Company will be subject to regular corporate income taxes to the extent that it distributes less than 100% of its net capital gains or distributes at least 90%, but less than 100%, of its net taxable income each year. In addition, the Company will be subject to a 4% nondeductible excise tax on the amount, if any, by which distributions it pays in any calendar year are less than the sum of 85% of its ordinary income, 95% of its net capital gains, and 100% of its undistributed income from prior years. To maintain the Company’s REIT status and avoid the payment of federal income and excise taxes, the Operating Partnership may need to borrow funds and distribute or loan the proceeds to the Company so it can meet the REIT distribution requirements even if the then-prevailing market conditions are not favorable for these borrowings. These borrowing needs could result from differences in timing between the actual receipt of income and inclusion of income for federal income tax purposes, or the effect of nondeductible capital expenditures, the creation of reserves or required debt or amortization payments.

If a transaction intended to qualify as a Section 1031 Exchange is later determined to be taxable or if we are unable to identify and complete the acquisition of a suitable replacement property to effect a Section 1031 Exchange, we may face adverse consequences, and if the laws applicable to such transactions are amended or repealed, we may not be able to dispose of properties on a tax deferred basis. When possible, we dispose of properties in transactions that are intended to qualify as Section 1031 Exchanges. It is possible that the qualification of a transaction as a Section 1031 Exchange could be successfully challenged and determined to be currently taxable or that we may be unable to identify

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and complete the acquisition of a suitable replacement property to effect a Section 1031 Exchange. In such case, our taxable income and earnings and profits would increase. This could increase the dividend income to our stockholders by reducing any return of capital they received. In some circumstances, we may be required to pay additional dividends or, in lieu of that, corporate income tax, possibly including interest and penalties. As a result, we may be required to borrow funds in order to pay additional dividends or taxes and the payment of such taxes could cause us to have less cash available to distribute to our stockholders. In addition, if a Section 1031 Exchange were later to be determined to be taxable, we may be required to amend our tax returns for the applicable year in question, including any information reports we sent our stockholders. Moreover, under the Tax Cuts and Jobs Act (the “2017 Tax Legislation”), for exchanges completed after December 31, 2017, unless the property was disposed of or received in the exchange on or before such date, Section 1031 of the Code permits exchanges of real property only. It is possible that additional legislation could be enacted that could further modify or repeal the laws with respect to Section 1031 Exchanges, which could make it more difficult or not possible for us to dispose of properties on a tax deferred basis.

Dividends payable by REITs, including us, generally do not qualify for the reduced tax rates available for some dividends. “Qualified dividends” payable to U.S. stockholders that are individuals, trusts and estates generally are subject to tax at preferential rates. Subject to limited exceptions, dividends payable by REITs are not eligible for these reduced rates and are taxable at ordinary income tax rates. The more favorable rates applicable to regular corporate qualified dividends could cause investors who are individuals, trusts and estates to perceive investments in REITs to be relatively less attractive than investments in the stocks of non-REIT corporations that pay dividends, which could adversely affect the value of the shares of REITs, including the shares of our capital stock. However, non-corporate stockholders, including individuals, generally may deduct up to 20% of dividends from a REIT, other than capital gain dividends and dividends treated as qualified dividend income, for taxable years beginning after December 31, 2017 and before January 1, 2026.

The tax imposed on REITs engaging in “prohibited transactions” may limit our ability to engage in transactions which would be treated as sales for federal income tax purposes. A REIT’s net income from prohibited transactions is subject to a 100% penalty tax. In general, prohibited transactions are sales or other dispositions of property, other than foreclosure property, held primarily for sale to customers in the ordinary course of business. Although we do not intend to hold any properties that would be characterized as held for sale to customers in the ordinary course of our business, unless a sale or disposition qualifies under certain statutory safe harbors, such characterization is a factual determination and no guarantee can be given that the IRS would agree with our characterization of our properties or that we will always be able to make use of the available safe harbors.

Complying with REIT requirements may cause us to forego otherwise attractive opportunities or liquidate otherwise attractive investments. To qualify as a REIT for federal income tax purposes, we must continually satisfy tests concerning, among other things, the sources of our income, the nature and diversification of our assets, the amounts we distribute to our stockholders and the ownership of our capital stock. If we fail to comply with one or more of the asset tests at the end of any calendar quarter, we must correct the failure within 30 days after the end of the calendar quarter or qualify for certain statutory relief provisions to avoid losing our REIT qualification and suffering adverse tax consequences. In order to meet these tests, we may be required to forego investments we might otherwise make or to liquidate otherwise attractive investments. Thus, compliance with the REIT requirements may hinder our performance and reduce amounts available for distribution to our stockholders.

Legislative or regulatory action could adversely affect our stockholders or us. In recent years, numerous legislative, judicial and administrative changes have been made to the federal income tax laws applicable to investments in REITs and similar entities. Additional changes to tax laws are likely to continue to occur in the future, and any such changes may adversely impact our ability to qualify as a REIT, our tax treatment as a REIT, our ability to comply with contractual obligations or the tax treatment of our stockholders and limited partners. Also, the law relating to the tax treatment of other entities, or an investment in other entities, could change, making an investment in such other entities more attractive relative to an investment in a REIT.

The 2017 Tax Legislation has significantly changed the U.S. federal income taxation of U.S. businesses and their owners, including REITs and their stockholders. Changes made by the 2017 Tax Legislation that could affect us and our stockholders include:

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• temporarily reducing individual U.S. federal income tax rates on ordinary income; the highest individual U.S. federal income tax rate has been reduced from 39.6% to 37% for taxable years beginning after December 31, 2017 and before January 1, 2026;

• permanently eliminating the progressive corporate tax rate structure, which previously imposed a maximum corporate tax rate of 35%, and replacing it with a flat corporate tax rate of 21%;

• permitting a deduction for certain pass-through business income, including dividends received by our stockholders from us that are not designated by us as capital gain dividends or qualified dividend income, which will allow individuals, trusts, and estates to deduct up to 20% of such amounts for taxable years beginning after December 31, 2017 and before January 1, 2026;

• reducing the highest rate of withholding with respect to our distributions to non-U.S. stockholders that are treated as attributable to gains from the sale or exchange of U.S. real property interests from 35% to 21%;

• limiting our deduction for net operating losses arising in taxable years beginning after December 31, 2017 to 80% of REIT taxable income determined without regard to the dividends paid deduction;

• generally limiting the deduction for net business interest expense in excess of 30% of a business’ “adjusted taxable income,” except for taxpayers (including most equity REITs) that engage in certain real estate businesses and elect out of this rule (provided that such electing taxpayers must use an alternative depreciation system with longer depreciation periods);

• eliminating the corporate alternative minimum tax, for taxable years after December 31, 2017;

• requiring us to take into account certain income no later than when we take it into account on applicable financial statements, even if the financial statements take such income into account before it accrues under otherwise applicable Code rules; and

• repealing the performance-based compensation exception to the $1 million deduction limit on executive compensation and expanding the scope of employees to whom the limit applies.

The legislation is unclear in many respects and could be subject to potential amendments and technical corrections, as well as interpretations and implementing regulations by the U.S. Treasury Department and IRS, any of which could lessen or increase the impact of the legislation. In addition, it is unclear how these U.S. federal income tax changes will affect state and local taxation, which often uses federal taxable income as a starting point for computing state and local tax liabilities. While some of the changes made by the tax legislation may adversely affect us in one or more reporting periods and prospectively, other changes may be beneficial on a going forward basis.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

35

ITEM 2.    PROPERTIES

General

Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2019:

	Number of Buildings	Rentable Square Feet	Number of Tenants	Percentage  Occupied		Percentage Leased
Stabilized Office Properties	112	13,475,795	451	94.6	%	97.0	%

	Number of Buildings	Number of Units	2018 Average Occupancy
Stabilized Residential Property	1	200	82.4	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently committed for construction, under construction or in the tenant improvement phase, undeveloped land, recently completed residential properties not yet stabilized and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and retail properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets at the historical cost of the property as the projects are placed in service.

During the year ended December 31, 2019, we added one completed development project to our stabilized office portfolio consisting of 394,340 square feet in San Francisco, California. As of December 31, 2019, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2019.

	Number of Properties/Projects	Estimated Rentable Square Feet (1) / Units
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

________________________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

Our stabilized portfolio also excludes our future development pipeline, which as of December 31, 2019, was comprised of five future development sites, representing approximately 61 gross acres of undeveloped land.

As of December 31, 2019, all of our properties and development projects were owned and all of our business was conducted in the state of California with the exception of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. All of our properties and development projects are 100% owned, excluding four office properties owned by three consolidated property partnerships and two development projects held in Variable Interest Entities (“VIEs”) which we consolidated for financial reporting purposes that were established to facilitate potential Section 1031 transactions.

We own our interests in all of our real estate assets through the Operating Partnership and the Finance Partnership. All our properties are held in fee, except for the fourteen office buildings that are held subject to five long-term ground

36

leases for the land (see Note 18 “Commitments and Contingencies” to our consolidated financial statements included in this report for additional information regarding our ground lease obligations).

In general, the office properties are leased to tenants on a full service gross, modified gross or triple net basis. Under a full service gross lease, we are obligated to pay the tenant’s proportionate share of real estate taxes, insurance and operating expenses up to the amount incurred during the tenant’s first year of occupancy (“Base Year”) or a negotiated amount approximating the tenant’s pro-rata share of real estate taxes, insurance and operating expenses (“Expense Stop”). The tenant pays its pro-rata share of increases in expenses above the Base Year or Expense Stop. A modified gross lease is similar to a full service gross lease, except tenants are obligated to pay their proportionate share of certain operating expenses, usually electricity, directly to the service provider. In addition, some office properties, primarily in the greater Seattle region and certain properties in certain submarkets in San Francisco, are leased to tenants on a triple net basis, pursuant to which the tenants pay their proportionate share of real estate taxes, operating costs and utility costs.

We believe that all of our properties are well maintained and do not require significant capital improvements. As of December 31, 2019, we managed all of our office properties through internal property managers.

Office Properties

The following table sets forth certain information relating to each of the stabilized office properties owned as of December 31, 2019.

Property Location		No. of Buildings	Year Built/ Renovated	Rentable Square Feet	Percentage Occupied at 12/31/2019 (1)		Annualized Base Rent (in $000’s) (2)	Annualized Rent Per Square Foot (2)
Greater Los Angeles
3101-3243 La Cienega Boulevard Culver City, California	(3)	19	2008-2017	151,908	100.0	%	6,853	45.11
2240 E. Imperial Highway, El Segundo, California	(4)	1	1983/ 2008	122,870	100.0	%	3,950	32.15
2250 E. Imperial Highway, El Segundo, California	(5)	1	1983	298,728	100.0	%	10,206	34.31
2260 E. Imperial Highway, El Segundo, California	(4)	1	1983/ 2012	298,728	100.0	%	10,510	35.18
909 N. Pacific Coast Highway, El Segundo, California	(6)	1	1972/ 2005	244,136	92.9	%	8,414	37.56
999 N. Pacific Coast Highway, El Segundo, California	(7)	1	1962/ 2003	128,588	93.4	%	3,967	34.37
6115 W. Sunset Blvd., Los Angeles, California	(8)	1	1938/ 2015	26,105	100.0	%	1,665	63.78
6121 W. Sunset Blvd., Los Angeles, California	(3)	1	1938/ 2015	91,173	100.0	%	4,612	50.59
1525 N. Gower St., Los Angeles, California	(4)	1	2016	9,610	100.0	%	652	67.88
1575 N. Gower St., Los Angeles, California	(9)	1	2016	251,245	100.0	%	16,170	64.36
1500 N. El Centro Ave., Los Angeles, California	(10)	1	2016	104,504	100.0	%	7,104	67.98
6255 Sunset Blvd, Los Angeles, California	(11)	1	1971/ 1999	323,920	96.8	%	14,078	46.27
3750 Kilroy Airport Way, Long Beach, California	(12)	1	1989	10,457	100.0	%	92	30.42
3760 Kilroy Airport Way, Long Beach, California	(10)	1	1989	165,278	92.5	%	4,876	31.89
3780 Kilroy Airport Way, Long Beach, California	(10)	1	1989	221,452	81.5	%	5,708	32.35
3800 Kilroy Airport Way, Long Beach, California	(10)	1	2000	192,476	100.0	%	6,202	32.22
3840 Kilroy Airport Way, Long Beach, California	(10)	1	1999	136,026	100.0	%	4,882	35.89

37

Property Location		No. of Buildings	Year Built/ Renovated	Rentable Square Feet	Percentage Occupied at 12/31/2019 (1)		Annualized Base Rent (in $000’s) (2)		Annualized Rent Per Square Foot (2)
3880 Kilroy Airport Way, Long Beach, California	(13)	1	1987/ 2013	96,035	100.0	%	2,839		29.56
3900 Kilroy Airport Way, Long Beach, California	(10)	1	1987	129,893	91.4	%	3,159		26.65
8560 West Sunset Blvd, West Hollywood, California	(10)	1	1963/ 2007	71,875	100.0	%	5,187		72.79
8570 West Sunset Blvd, West Hollywood, California	(14)	1	2002/ 2007	43,603	98.1	%	3,610		84.39
8580 West Sunset Blvd, West Hollywood, California	(3)	1	2002/ 2007	7,126	100.0	%	—		—
8590 West Sunset Blvd, West Hollywood, California	(3)	1	2002/ 2007	56,095	86.8	%	1,492		32.46
12100 W. Olympic Blvd., Los Angeles, California	(10)	1	2003	152,048	87.8	%	8,115		60.78
12200 W. Olympic Blvd., Los Angeles, California	(10)	1	2000	150,832	89.5	%	6,843		68.14
12233 W. Olympic Blvd., Los Angeles, California	(15)	1	1980/ 2011	151,029	86.9	%	4,541		60.40
12312 W. Olympic Blvd., Los Angeles, California	(16)	1	1950/ 1997	76,644	100.0	%	4,096		53.44
1633 26th Street, Santa Monica, California	(10)	1	1972/ 1997	43,857	34.9	%	819		53.47
2100/2110 Colorado Avenue, Santa Monica, California	(10)	3	1992/ 2009	102,864	100.0	%	4,357		42.36
3130 Wilshire Blvd., Santa Monica, California	(10)	1	1969/ 1998	90,074	100.0	%	4,091		45.42
501 Santa Monica Blvd., Santa Monica, California	(17)	1	1974	76,803	97.8	%	4,956		65.95
Subtotal/Weighted Average – Los Angeles and Ventura Counties		51		4,025,982	95.2	%	$	164,046	$	44.23
San Diego County
12225 El Camino Real, Del Mar, California	(4)	1	1998	58,401	100.0	%	$	2,483	$	42.52
12235 El Camino Real, Del Mar, California	(4)	1	1998	53,751	88.9	%	2,225		46.57
12340 El Camino Real, Del Mar, California	(18)	1	2002	89,272	50.1	%	1,615		36.11
12348 High Bluff Drive, Del Mar, California	(19)	1	1999	38,806	80.8	%	1,298		41.36
12390 El Camino Real, Del Mar, California	(4)	1	2000	70,140	100.0	%	3,318		47.31
12400 High Bluff Drive, Del Mar, California	(4)	1	2004	209,220	100.0	%	10,671		51.00
12770 El Camino Real, Del Mar, California	(20)	1	2016	73,032	66.1	%	2,222		56.96
12780 El Camino Real, Del Mar, California	(16)	1	2013	140,591	100.0	%	7,138		50.77
12790 El Camino Real, Del Mar, California	(21)	1	2013	78,836	71.2	%	2,446		43.58
3579 Valley Centre Drive, Del Mar, California	(4)	1	1999	54,960	100.0	%	2,182		39.70
3611 Valley Centre Drive, Del Mar, California	(22)	1	2000	129,656	100.0	%	5,078		39.17
3661 Valley Centre Drive, Del Mar, California	(23)	1	2001	128,364	100.0	%	6,025		49.60
3721 Valley Centre Drive, Del Mar, California	(24)	1	2003	115,193	100.0	%	5,310		46.09
3811 Valley Centre Drive, Del Mar, California	(16)	1	2000	112,067	100.0	%	5,199		46.39
13280 Evening Creek Drive South, I-15 Corridor, California	(25)	1	2008	41,196	100.0	%	1,196		29.04
13290 Evening Creek Drive South, I-15 Corridor, California	(4)	1	2008	61,180	100.0	%	1,453		23.75

38

Property Location		No. of Buildings	Year Built/ Renovated	Rentable Square Feet	Percentage Occupied at 12/31/2019 (1)		Annualized Base Rent (in $000’s) (2)		Annualized Rent Per Square Foot (2)
13480 Evening Creek Drive North, I-15 Corridor, California	(4)	1	2008	154,157	100.0	%	5,201		33.74
13500 Evening Creek Drive North, I-15 Corridor, California	(26)	1	2004	137,658	43.0	%	2,261		38.23
13520 Evening Creek Drive North, I-15 Corridor, California	(27)	1	2004	146,701	84.4	%	4,391		36.35
2305 Historic Decatur Road, Point Loma, California	(28)	1	2009	107,456	100.0	%	3,984		37.08
4690 Executive Drive, UTC, California	(10)	1	1999	47,846	91.4	%	1,424		32.58
Subtotal/Weighted Average – San Diego County		21		2,048,483	89.7	%	$	77,120	$	42.41
San Francisco Bay Area
4100 Bohannon Drive, Menlo Park, California	(3)	1	1985	47,379	100.0	%	$	2,640	$	55.72
4200 Bohannon Drive, Menlo Park, California	(3)	1	1987	45,451	70.8	%	1,751		54.41
4300 Bohannon Drive, Menlo Park, California	(3)	1	1988	63,079	48.8	%	1,765		57.35
4400 Bohannon Drive, Menlo Park, California	(3)	1	1988	48,146	93.3	%	1,567		37.38
4500 Bohannon Drive, Menlo Park, California	(3)	1	1990	63,078	100.0	%	3,580		56.76
4600 Bohannon Drive, Menlo Park, California	(3)	1	1990	48,147	100.0	%	2,741		56.92
4700 Bohannon Drive, Menlo Park, California	(3)	1	1989	63,078	100.0	%	3,513		55.70
1290-1300 Terra Bella Avenue, Mountain View, California	(3)	1	1961	114,175	100.0	%	5,345		46.80
331 Fairchild Drive, Mountain View, California	(16)	1	2013	87,147	100.0	%	4,185		48.03
680 E. Middlefield Road, Mountain View, California	(16)	1	2014	170,090	100.0	%	7,729		45.44
690 E. Middlefield Road, Mountain View, California	(16)	1	2014	170,823	100.0	%	7,763		45.44
1701 Page Mill Road, Palo Alto, California	(3)	1	2015	128,688	100.0	%	8,461		65.75
3150 Porter Drive, Palo Alto, California	(3)	1	1998	36,897	100.0	%	2,051		55.59
900 Jefferson Avenue, Redwood City, California	(3)	1	2015	228,505	100.0	%	13,670		59.82
900 Middlefield Road, Redwood City, California	(3)	1	2015	118,764	100.0	%	6,983		59.05
100 Hooper Street, San Francisco, California	(3)	1	2018	394,340	87.6	%	22,386		64.83
100 First Street, San Francisco, California	(29)	1	1988	467,095	97.5	%	30,153		69.13
201 Third Street, San Francisco, California	(30)	1	1983	346,538	99.2	%	23,142		68.24
250 Brannan Street, San Francisco, California	(4)	1	1907/ 2001	100,850	100.0	%	10,323		102.36
301 Brannan Street, San Francisco, California	(4)	1	1909/ 1989	82,834	100.0	%	7,580		91.51
303 Second Street, San Francisco, California	(31)	1	1988	784,658	78.8	%	46,549		75.61
333 Brannan Street, San Francisco, California	(32)	1	2016	185,602	100.0	%	18,138		97.73
345 Brannan Street, San Francisco, California	(4)	1	2015	110,050	99.7	%	10,815		98.55
350 Mission Street, San Francisco, California	(3)	1	2016	455,340	99.7	%	24,076		53.09
360 Third Street, San Francisco, California	(4)	1	2013	429,796	100.0	%	30,687		71.82

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Property Location		No. of Buildings	Year Built/ Renovated	Rentable Square Feet	Percentage Occupied at 12/31/2019 (1)		Annualized Base Rent (in $000’s) (2)		Annualized Rent Per Square Foot (2)
345 Oyster Point Boulevard, South San Francisco, California	(3)	1	2001	40,410	100.0	%	2,192		54.24
347 Oyster Point Boulevard, South San Francisco, California	(3)	1	1998	39,780	100.0	%	2,158		54.24
349 Oyster Point Boulevard, South San Francisco, California	(3)	1	1999	65,340	100.0	%	3,371		51.60
505 N. Mathilda Avenue, Sunnyvale, California	(3)	1	2014	212,322	100.0	%	9,449		44.50
555 N. Mathilda Avenue, Sunnyvale, California	(3)	1	2014	212,322	100.0	%	9,449		44.50
599 N. Mathilda Avenue, Sunnyvale, California	(3)	1	2000	76,031	100.0	%	3,610		47.48
605 N. Mathilda Avenue, Sunnyvale, California	(3)	1	2014	162,785	100.0	%	7,244		44.50
Subtotal/Weighted Average – San Francisco		32		5,599,540	95.0	%	$	335,066	$	63.39
Greater Seattle
601 108th Avenue NE, Bellevue, Washington	(33)	1	2000	488,470	97.1	%	$	17,779	$	37.90
10900 NE 4th Street, Bellevue, Washington	(34)	1	1983	428,557	96.7	%	14,937		36.18
837 N. 34th Street, Lake Union, Washington	(3)	1	2008	112,487	91.8	%	3,655		35.40
701 N. 34th Street, Lake Union, Washington	(3)	1	1998	141,860	97.5	%	5,130		37.08
801 N. 34th Street, Lake Union, Washington	(16)	1	1998	169,412	100.0	%	5,789		34.17
320 Westlake Avenue North, Lake Union, Washington	(3)	1	2007	184,644	100.0	%	8,232		44.58
321 Terry Avenue North, Lake Union, Washington	(3)	1	2013	135,755	100.0	%	5,713		42.09
401 Terry Avenue North, Lake Union, Washington	(16)	1	2003	140,605	100.0	%	7,008		49.84
Subtotal/Weighted Average – Greater Seattle		8		1,801,790	97.7	%	$	68,243	$	38.91
TOTAL/WEIGHTED AVERAGE		112		13,475,795	94.6	%	$	644,475	$	51.28

_________________

(1) Based on all leases at the respective properties in effect as of December 31, 2019. Includes month-to-month leases as of December 31, 2019.

(2) Annualized base rental revenue includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related to tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases and expense reimbursement revenue. Excludes month-to-month leases and vacant space as of December 31, 2019. Includes 100% of annualized base rent of consolidated property partnerships.

(3) For these properties, the leases are written on a triple net basis.

(4) For these properties, the leases are written on a modified gross basis.

(5) For this property, leases of approximately 263,000 rentable square feet are written on a modified gross basis and approximately 36,000 rentable square feet are written on a full service gross basis.

(6) For this property, leases of approximately 222,000 rentable square feet are written on a full service gross basis and approximately 5,000 rentable square feet are written on a triple net basis.

(7) For this property, leases of approximately 111,000 rentable square feet are written on a full service gross basis and approximately 9,000 rentable square feet are written on a gross basis.

(8) For this property, leases of approximately 15,000 rentable square feet are written on a triple net basis, approximately 6,000 rentable square feet are written on a gross basis, and approximately 5,000 rentable square feet are written on a full service gross basis.

(9) For this property, leases of approximately 236,000 rentable square feet are written on a modified gross basis and approximately 15,000 rentable square feet are written on a full service gross basis.

(10) For these properties, the leases are written on a full service gross basis.

(11) For this property, leases of approximately 294,000 rentable square feet are written on a full service gross basis, approximately 17,000 rentable square feet are written on a triple net basis and approximately 5,000 rentable square feet are written on a modified gross basis.

(12) For this property, leases of approximately 6,000 rentable square feet are written on a full service gross basis and approximately 4,000 rentable square feet are written on a modified gross basis.

(13) For this property, leases of approximately 50,000 rentable square feet are written on a full service gross basis and approximately 46,000 rentable square feet are written on a modified net basis.

(14) For this property, leases of approximately 29,000 rentable square feet are written on a full service gross basis and approximately 13,000 rentable square feet are written on a triple net basis.

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(15) For this property, leases of approximately 105,000 rentable square feet are written on a modified gross basis, approximately 19,000 rentable square feet are written on a gross basis and approximately 8,000 rentable square feet are written on a full service gross basis.

(16) For these properties, the leases are written on a modified net basis.

(17) For this property, leases of approximately 71,000 rentable square feet are written on a full service gross basis and approximately 4,000 rentable square feet are written on a triple net basis.

(18) For this property, leases of approximately 23,000 rentable square feet are written on a modified gross basis and approximately 21,000 rentable square feet are written on a full service gross basis.

(19) For this property, leases of approximately 29,000 rentable square feet are written on a full service gross basis and approximately 3,000 rentable square feet are written on a modified gross basis.

(20) For this property, leases of approximately 70,000 rentable square feet are written on a full service gross basis and approximately 3,000 rentable square feet are written on a modified gross basis.

(21) For this property, leases of approximately 49,000 rentable square feet are written on a modified gross basis and approximately 7,000 rentable square feet are written on a triple net basis.

(22) For this property, leases of approximately 125,000 rentable square feet are written on a modified gross basis and approximately 5,000 rentable square feet are written on a full service gross basis.

(23) For this property, leases of approximately 80,000 rentable square feet are written on a modified gross basis and approximately 48,000 rentable square feet are written on a full service gross basis.

(24) For this property, leases of approximately 92,000 rentable square feet are written on a modified gross basis and approximately 24,000 rentable square feet are written on a full service gross basis.

(25) For this property, leases of approximately 37,000 rentable square feet are written on a full service gross basis and approximately 4,000 rentable square feet are written on a modified gross basis.

(26) For this property, leases of approximately 57,000 rentable square feet are written on a full service gross basis and approximately 2,000 rentable square feet are written on a modified gross basis.

(27) For this property, leases of approximately 88,000 rentable square feet are written on a modified gross basis and approximately 35,000 rentable square feet are written on a full service gross basis.

(28) For this property, leases of approximately 81,000 rentable square feet are written on a full service gross basis, approximately 23,000 rentable square feet are written on a gross basis and approximately 4,000 rentable square feet are written on a modified gross basis.

(29) For this property, leases of approximately 210,000 rentable square feet are written on a modified gross basis, approximately 164,000 rentable square feet are written on a full service gross basis, approximately 73,000 rentable square feet are written on a gross basis, and approximately 8,000 rentable square feet are written on a triple net basis.

(30) For this property, leases of approximately 196,000 rentable square feet are written on a full service gross basis, approximately 135,000 rentable square feet are written on a modified gross basis, and approximately 13,000 rentable square feet are written on a triple net basis.

(31) For this property, leases of approximately 557,000 rentable square feet are written on a modified gross basis, approximately 86,000 rentable square feet are written on a full service gross basis, approximately 39,000 rentable square feet are written on a gross basis and approximately 24,000 rentable square feet are written on a triple net basis.

(32) For this property, leases of approximately 182,000 rentable square feet are written on a modified gross basis and approximately 4,000 rentable square feet are written on a triple net basis.

(33) For this property, leases of approximately 462,000 rentable square feet are written on a triple net basis, approximately 7,000 rentable square feet are written on a modified gross basis and approximately 5,000 rentable square feet is written on a full service gross basis.

(34) For this property, leases of approximately 275,000 rentable square feet are written on a triple net basis and approximately 139,000 rentable square feet are written on a full service gross basis.

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Stabilized Office Development Projects and Completed Residential Development Projects

During the year ended December 31, 2019, the following property was added to our stabilized portfolio of operating properties:

		Construction Period
Stabilized Office Development Project	Location	Start Date	Completion Date	Stabilization Date	Rentable Square Feet	Office % Occupied
100 Hooper (1)	San Francisco	4Q 2016	2Q 2018	2Q 2019	394,340	100%

_______________________

(1) The project is comprised of 311,859 square feet of office and 82,481 square feet of PDR space. The office component is 100% occupied by Adobe Systems, Inc. and the PDR component is 86% leased and 41% occupied.

During the year ended December 31, 2019, we completed construction on the first phase of the following residential development project:

		Construction Period
Completed Residential Project	Location	Start Date	Completion Date	Number of Units	% Leased (1)
One Paseo - Residential Phase I	Del Mar	4Q 2016	3Q 2019	237	66%

_______________________

(1) The % leased is as of the date of this report.

In-Process Development Projects and Future Development Pipeline

The following tables set forth certain information relating to our in-process development pipeline as of December 31, 2019.

	Location	Construction Start Date	Estimated Stabilization Date (2)	Estimated Rentable Square Feet	Total Project % Leased	Total Project % Occupied
TENANT IMPROVEMENT (1)
Office
San Francisco Bay Area
The Exchange on 16th (3)	San Francisco	2Q 2015	3Q 2020	750,000	100%	82%
Mixed-Use
San Diego County
One Paseo - Retail	Del Mar	4Q 2016	1Q 2020	96,000	100%	89%
TOTAL:				846,000	100%	83%

_______________________

(1) Represents projects that have reached cold shell condition and are ready for tenant improvements, which may require additional major base building construction before being placed in service.

(2) For office and retail, represents the earlier of anticipated 95% occupancy date or one year from substantial completion of base building components. For multi-phase projects, interest and carry cost capitalization may cease and recommence driven by various factors, including tenant improvement construction and other tenant related timing or project scope.

(3) In the latter half of the second quarter of 2019, the Company delivered and commenced revenue recognition on Phase I of the Exchange on 16th, representing approximately 52% of the 750,000 square foot development project. During the fourth quarter of 2019, the Company delivered and commenced revenue recognition on Phase II, representing approximately 30% of the project.

42

		Construction Start Date	Estimated Stabilization Date (1)	Estimated Rentable Square Feet	Office % Leased
UNDER CONSTRUCTION	Location
Office/Life Science
San Francisco Bay Area
Kilroy Oyster Point - Phase I	South San Francisco	1Q 2019	4Q 2021	656,000	100%
San Diego County
9455 Towne Center Drive (2)	University Towne Center	1Q 2019	1Q 2021	160,000	100%
Greater Seattle
333 Dexter	South Lake Union	2Q 2017	3Q 2022	635,000	100%
Mixed-Use
Greater Los Angeles
Netflix // On Vine - Office	Hollywood	1Q 2018	1Q 2021	355,000	100%
Living // On Vine - Residential	Hollywood	4Q 2018	4Q 2020	193 Resi Units	N/A
San Diego County
2100 Kettner	Little Italy	3Q 2019	1Q 2022	200,000	—%
One Paseo - Residential Phases II and III (3)	Del Mar	4Q 2016	2Q 2020	371 Resi Units	N/A
One Paseo - Office	Del Mar	4Q 2018	2Q 2021	285,000	80%
TOTAL:					89%

_______________________

(1) For office and retail, represents the earlier of anticipated 95% occupancy date or one year from substantial completion of base building components. For multi-phase projects, interest and carry cost capitalization may cease and recommence driven by various factors, including tenant improvement construction and other tenant related timing or project scope.

(2) In December 2019, the Company executed a long-term lease with a major technology company for 100% of the project.

(3) Phase I of the project, comprised of 237 units, was completed mid-September 2019.

The following table sets forth certain information relating to our future development pipeline as of December 31, 2019.

Future Development Pipeline	Location	Approx. Developable Square Feet (1)
San Diego County
Santa Fe Summit – Phases II and III	56 Corridor	600,000 - 650,000
1335 Broadway & 901 Park Boulevard	East Village	TBD
San Francisco Bay Area
Kilroy Oyster Point - Phases II - IV	South San Francisco	1,750,000 - 1,900,000
Flower Mart	SOMA	2,300,000
Greater Seattle
Seattle CBD Project	Seattle CBD	TBD

_______________________

(1) The developable square feet and scope of projects could change materially from estimated data provided due to one or more of the following: any significant changes in the economy, market conditions, our markets, tenant requirements and demands, construction costs, new supply, regulatory and entitlement processes or project design.

43

Significant Tenants

The following table sets forth information about our 15 largest tenants based upon annualized base rental revenues, as defined below, as of December 31, 2019.

Tenant Name	Region	Annualized Base Rental Revenue(1)(2)		Percentage of Total Annualized Base Rental Revenue(1)	Lease Expiration Date
		(in thousands)
Dropbox, Inc.(3)	San Francisco Bay Area	$	45,709	7.1%	November 2033
GM Cruise, LLC	San Francisco Bay Area	36,337		5.6%	November 2031
LinkedIn Corporation / Microsoft Corporation	San Francisco Bay Area	29,752		4.6%	Various (4)
Adobe Systems, Inc.	San Francisco Bay Area / Greater Seattle	27,897		4.3%	Various (5)
salesforce.com, inc.	San Francisco Bay Area	24,076		3.7%	Various (6)
DIRECTV, LLC	Greater Los Angeles	23,152		3.6%	September 2027
Box, Inc.	San Francisco Bay Area	22,441		3.5%	Various (7)
Okta, Inc.	San Francisco Bay Area	17,122		2.7%	October 2028
Riot Games, Inc.	Greater Los Angeles	15,514		2.4%	Various (8)
Synopsys, Inc.	San Francisco Bay Area	15,492		2.4%	August 2030
Viacom International, Inc.	Greater Los Angeles	13,718		2.1%	December 2028
DoorDash, Inc.	San Francisco Bay Area	13,531		2.1%	January 2032
Amazon.com	Greater Seattle	12,397		1.9%	February 2030
Nektar Therapeutics, Inc.	San Francisco Bay Area	12,297		1.9%	January 2030
Concur Technologies	Greater Seattle	10,643		1.7%	Various (9)
Total		$	320,078	49.6%

_______________________

(1) Annualized base rental revenue includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases, and expense reimbursement revenue. Excludes month-to-month leases and vacant space as of December 31, 2019.

(2) Includes 100% of the annualized base rental revenues of consolidated property partnerships.

(3) During the year ended December 31, 2019, the Company completed construction and commenced revenue recognition on its lease with Dropbox, Inc. for the first two phases of The Exchange on 16th, which represent approximately 80% of the 750,000 square foot development project located in San Francisco’s Mission Bay district.

(4) The LinkedIn Corporation / Microsoft Corporation leases, which contribute $3.6 million and $26.2 million, expire in October 2024 and September 2026, respectively.

(5) The Adobe Systems Inc. leases, which contribute $1.1 million, $5.8 million, and $21.0 million, expire in June 2027, July 2031 and August 2031, respectively.

(6) The salesforce.com, inc. leases, which contribute $0.6 million and $23.5 million, expire in May 2031 and September 2032, respectively.

(7) The Box, Inc. leases, which contribute $2.0 million and $20.4 million, expire in August 2021 and June 2028, respectively.

(8) The Riot Games leases, which contribute $2.1 million, $5.7 million, and $7.7 million, expire in November 2020, March 2023, and November 2024, respectively.

(9) The Concur Technologies leases, which contribute $1.8 million and $8.8 million, expire in April 2025 and December 2025, respectively.

44

The following pie chart sets forth the composition of our tenant base by industry and as a percentage of our annualized base rental revenue based on the North American Industry Classification System as of December 31, 2019.

Our West Coast markets are dynamic and populated with innovative and creative tenants, including but not limited to technology, entertainment and digital media. While technology companies comprise 51% of our office portfolio base rent, technology is a broad concept that encompasses diverse industries including software, social media, hardware, cloud computing, internet media and technology services.

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Lease Expirations

The following table sets forth a summary of our office lease expirations for each of the next ten years beginning with 2020, assuming that none of the tenants exercise renewal options or termination rights. See further discussion of our lease expirations under “Item 1A. Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Factors that May Influence Future Results of Operations”.

Lease Expirations

Year of Lease Expiration	# of Expiring Leases	Total Square Feet	% of Total Leased Square Feet		Annualized Base Rent (000’s)(1) (2)		% of Total Annualized Base Rent (1)		Annualized Rent per Square Foot (1)
2020 (3)	82	965,896	7.7	%	$	42,648	6.6	%	$	44.15
2021 (3)	80	843,494	6.8	%	36,461		5.6	%	43.23
2022	62	749,273	6.0	%	32,488		5.1	%	43.36
2023	77	1,227,648	9.7	%	64,992		10.1	%	52.94
2024	56	998,249	8.0	%	47,378		7.4	%	47.46
2025	40	595,671	4.8	%	28,654		4.4	%	48.10
2026	29	1,472,010	11.8	%	64,970		10.1	%	44.14
2027	26	1,213,390	9.7	%	49,585		7.7	%	40.86
2028	19	913,920	7.3	%	57,213		8.9	%	62.60
2029	9	735,331	5.9	%	41,517		6.4	%	56.46
2030 and beyond	35	2,811,792	22.3	%	178,569		27.7	%	63.51
Total (4)	515	12,526,674	100.0	%	$	644,475	100.0	%	$	51.45

_______________________

(1) Annualized base rent includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases and expense reimbursement revenue. Additionally, the underlying leases contain various expense structures including full service gross, modified gross and triple net. Amounts represent percentage of total portfolio annualized contractual base rental revenue.

(2) Includes 100% of annualized based rent of consolidated property partnerships.

(3) Adjusting for leasing transactions executed as of December 31, 2019 but not yet commenced, the 2020 and 2021 expirations would be reduced by 267,449 and 173,267 square feet, respectively.

(4) For leases that have been renewed early with existing tenants, the expiration date and annualized base rent information presented takes into consideration the renewed lease terms. Excludes leases not commenced as of December 31, 2019, space leased under month-to-month leases, storage leases, vacant space and future lease renewal options not executed as of December 31, 2019.

Secured Debt

As of December 31, 2019, the Operating Partnership had two outstanding mortgage notes payable which were secured by certain of our properties. Our secured debt represents an aggregate principal indebtedness of approximately $259.5 million. See additional information regarding our secured debt in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Liquidity Sources,” Notes 8 and 9 to our consolidated financial statements and Schedule III—Real Estate and Accumulated Depreciation included in this report. Management believes that, as of December 31, 2019, the value of the properties securing the applicable secured obligations in each case exceeded the principal amount of the outstanding obligation.

ITEM 3. LEGAL PROCEEDINGS

We and our properties are subject to routine litigation incidental to our business. These matters are generally covered by insurance. As of December 31, 2019, we are not a defendant in, and our properties are not subject to, any legal proceedings that we believe, if determined adversely to us, would have a material adverse effect upon our financial condition, results of operations, or cash flows.

ITEM 4. MINE SAFETY DISCLOSURES

None.

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PART II

ITEM 5. MARKET FOR KILROY REALTY CORPORATION’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

The Company’s common stock is traded on the New York Stock Exchange (“NYSE”) under the symbol “KRC.” As of the date this report was filed, there were approximately 108 registered holders of the Company’s common stock. The following table illustrates dividends declared during 2019 and 2018 as reported on the NYSE.

2019	Per Share Common Stock Dividends Declared
First quarter	$	0.4550
Second quarter	0.4850
Third quarter	0.4850
Fourth quarter	0.4850
2018	Per Share Common Stock Dividends Declared
First quarter	$	0.4250
Second quarter	0.4550
Third quarter	0.4550
Fourth quarter	0.4550

The Company pays distributions to common stockholders quarterly each January, April, July and October, at the discretion of the board of directors. Distribution amounts depend on our FFO, financial condition, capital requirements, the annual distribution requirements under the REIT provisions of the Code and such other factors as the board of directors deems relevant.

The table below reflects our purchases of equity securities during the three month period leading up to December 31, 2019.

Period	Total Number of Shares (or Units) Purchased (1)	Average Price Paid per Share (or Units)		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) that May Yet be Purchased Under the Plans or Programs
October 1 - October 31, 2019	125	$	82.08	—	—
November 1 - November 30, 2019	215	83.07		—	—
December 1 - December 31, 2019	2,906	84.12		—	—
Total	3,246	$	83.97	—	—

_______________

(1) Includes shares of common stock remitted to the Company to satisfy tax withholding obligations in connection with the distribution of, or the vesting and distribution of, restricted stock units or restricted stock in shares of common stock. The value of such shares of common stock remitted to the Company was based on the closing price of the Company’s common stock on the applicable withholding date.

47

MARKET FOR KILROY REALTY, L.P.’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

There is no established public trading market for the Operating Partnership’s common units. As of the date this report was filed, there were 20 holders of record of common units (including through the Company’s general partnership interest).

The following table reports the distributions per common unit declared during the years ended December 31, 2019 and 2018.

2019	Per Unit Common Unit Distribution Declared
First quarter	$	0.4550
Second quarter	0.4850
Third quarter	0.4850
Fourth quarter	0.4850
2018	Per Unit Common Unit Distribution Declared
First quarter	0.4250
Second quarter	0.4550
Third quarter	0.4550
Fourth quarter	0.4550

During 2019 and 2018, the Operating Partnership redeemed 2,000 and 51,906 common units, respectively, for the same number of shares of the Company’s common stock.

48

PERFORMANCE GRAPH

The following line graph compares the change in cumulative stockholder return on shares of the Company’s common stock to the cumulative total return of the NAREIT All Equity REIT Index, the Standard & Poor’s 500 Stock Index, and the SNL US REIT Office Index for the five-year period ended December 31, 2019. We include an additional index, the SNL US REIT Office Index, to the performance graph since management believes it provides additional information to investors about our performance relative to a more specific peer group. The SNL US REIT Office Index is a published and widely recognized index that comprises 22 office equity REITs, including us. The graph assumes the investment of $100 in us and each of the indices on December 31, 2014 and, as required by the SEC, the reinvestment of all distributions. The return shown on the graph is not necessarily indicative of future performance.

49

ITEM 6. SELECTED FINANCIAL DATA – KILROY REALTY CORPORATION

The following tables set forth selected consolidated financial and operating data on a historical basis for the Company. The following data should be read in conjunction with our financial statements and notes thereto and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in this report.

The consolidated balance sheet data as of December 31, 2019, 2018, 2017 and 2016 and the consolidated statement of operations data for all periods presented, and the consolidated statement of cash flows data for the years ended December 31, 2019, 2018 and 2017 have been derived from the historical consolidated financial statements of Kilroy Realty Corporation audited by an independent registered public accounting firm. The consolidated balance sheet data as of December 31, 2015 and the consolidated statement of cash flows data for the years ended December 31, 2016 and 2015 have been derived from the historical consolidated financial statements of Kilroy Realty Corporation and adjusted for the impact of subsequent accounting changes requiring retrospective application, if any.

Kilroy Realty Corporation Consolidated

(in thousands, except share, per share, square footage and occupancy data)

	Year Ended December 31,
	2019		2018		2017		2016		2015
Statements of Operations Data:
Total revenues from continuing operations	$	837,454	$	747,298	$	719,001	$	642,572	$	581,275
Income from continuing operations	215,229		277,926		180,615		303,798		238,604
Net income available to common stockholders	195,443		258,415		151,249		280,538		220,831
Per Share Data:
Weighted average shares of common stock outstanding – basic	103,200,568		99,972,359		98,113,561		92,342,483		89,854,096
Weighted average shares of common stock outstanding – diluted	103,849,168		100,482,365		98,727,331		93,023,034		90,395,775
Income from continuing operations available to common stockholders per share of common stock – basic	$	1.87	$	2.56	$	1.52	$	3.00	$	2.44
Income from continuing operations available to common stockholders per share of common stock – diluted	$	1.86	$	2.55	$	1.51	$	2.97	$	2.42
Net income available to common stockholders per share – basic	$	1.87	$	2.56	$	1.52	$	3.00	$	2.44
Net income available to common stockholders per share – diluted	$	1.86	$	2.55	$	1.51	$	2.97	$	2.42
Dividends declared per share (1)	$	1.910	$	1.790	$	1.650	$	3.375	$	1.400

 ________________________

(1) Dividends declared for the year ended December 31, 2016 includes a special dividend of $1.90 per share of common stock that was paid on January 13, 2017.

50

	December 31,
	2019			2018			2017			2016			2015
Balance Sheet Data:
Total real estate held for investment, before accumulated depreciation and amortization	$	9,628,773		$	8,426,632		$	7,417,777		$	7,060,754		$	6,328,146
Total assets  (1) (2)	8,900,094			7,765,707			6,802,838			6,706,633			5,926,430
Total debt (1)	3,552,778			2,932,601			2,347,063			2,320,123			2,225,469
Total preferred stock	—			—			—			192,411			192,411
Total noncontrolling interests (3)	277,348			271,354			259,523			216,322			63,620
Total equity (3)	4,570,858			4,201,261			3,960,316			3,759,317			3,234,586
Other Data:
Funds From Operations (4) (5)	$	418,478		$	360,491		$	346,787		$	333,742		$	316,612
Cash flows provided by (used in):
Operating activities	$	386,521		$	410,043		$	347,012		$	345,054		$	272,008
Investing activities (6)	(1,228,279		)	(808,915		)	(359,102		)	(579,420		)	(337,241		)
Financing activities	747,068			503,108			(171,241		)	427,291			23,471
Office Property Data:
Rentable square footage	13,475,795			13,232,580			13,720,597			14,025,856			13,032,406
Occupancy	94.6		%	94.4		%	95.2		%	96		%	94.8		%
Residential Property Data:
Number of units	200			200			200			200			N/A
Average occupancy (7)	82.4		%	79.7		%	70.2		%	46.0		%	N/A

_______________________

(1) On January 1, 2016, the Company adopted FASB ASU No. 2015-03 and 2015-15 which require deferred financing costs, except costs paid for the unsecured line of credit, to be reclassified as a reduction to the debt liability balance instead of being reported as an asset as historically presented. As a result, total assets and total debt have been adjusted from prior amounts reported to reflect this change for all periods presented.

(2) On January 1, 2019, the Company adopted FASB Topic 842 and recorded right of use ground lease assets and ground lease liabilities on its consolidate balance sheets. As of December 31, 2019, the consolidated balance sheets included $96.3 million of right of use ground lease assets and $98.4 million of ground lease liabilities.

(3) Includes the noncontrolling interests of the common units of the Operating Partnership and consolidated property partnerships (see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report for additional information).

(4) We calculate FFO in accordance with the 2018 Restated White Paper on FFO approved by the Board of Governors of NAREIT. The White Paper defines FFO as net income or loss calculated in accordance with GAAP, excluding extraordinary items, as defined by GAAP, gains and losses from sales of depreciable real estate and impairment write-downs associated with depreciable real estate, plus real estate-related depreciation and amortization (excluding amortization of deferred financing costs and depreciation of non-real estate assets) and after adjustment for unconsolidated partnerships and joint ventures. Our calculation of FFO includes the amortization of deferred revenue related to tenant-funded tenant improvements and excludes the depreciation of the related tenant improvement assets. We also add back net income attributable to noncontrolling common units of the Operating Partnership because we report FFO attributable to common stockholders and common unitholders.

We believe that FFO is a useful supplemental measure of our operating performance. The exclusion from FFO of gains and losses from the sale of operating real estate assets allows investors and analysts to readily identify the operating results of the assets that form the core of our activity and assists in comparing those operating results between periods. Also, because FFO is generally recognized as the industry standard for reporting the operations of REITs, it facilitates comparisons of operating performance to other REITs. However, other REITs may use different methodologies to calculate FFO, and accordingly, our FFO may not be comparable to all other REITs.

Implicit in historical cost accounting for real estate assets in accordance with GAAP is the assumption that the value of real estate assets diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, many industry investors and analysts have considered presentations of operating results for real estate companies using historical cost accounting alone to be insufficient. Because FFO excludes depreciation and amortization of real estate assets, we believe that FFO along with the required GAAP presentations provides a more complete measurement of our performance relative to our competitors and a more appropriate basis on which to make decisions involving operating, financing and investing activities than the required GAAP presentations alone would provide.

However, FFO should not be viewed as an alternative measure of our operating performance because it does not reflect either depreciation and amortization costs or the level of capital expenditures and leasing costs necessary to maintain the operating performance of our properties, which are significant economic costs and could materially impact our results from operations.

Adjustments to arrive at FFO were as follows: net income attributable to noncontrolling common units of the Operating Partnership, net income attributable to noncontrolling interests in consolidated property partnerships, depreciation and amortization of real estate assets, gains on sales of depreciable real estate and FFO attributable to noncontrolling interests in consolidated property partnerships. For additional information, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Non-GAAP Supplemental Financial Measure: Funds From Operations” including a reconciliation of the Company’s GAAP net income available for common stockholders to FFO for the periods presented.

(5) FFO includes amortization of deferred revenue related to tenant-funded tenant improvements of $19.2 million, $18.4 million, $16.8 million, $13.2 million and $13.3 million for the years ended December 31, 2019, 2018, 2017, 2016 and 2015, respectively.

51

(6) On January 1, 2017, the Company adopted FASB ASU No. 2016-18 which requires that a statement of cash flows explain the change during the period in the total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. As a result, cash flows provided by (used in) investing activities have been adjusted from prior amounts reported to reflect this change for all periods presented.

(7) For the year ended December 31, 2016, represents occupancy at December 31, 2016.

SELECTED FINANCIAL DATA – KILROY REALTY, L.P.

The following tables set forth selected consolidated financial and operating data on a historical basis for the Operating Partnership. The following data should be read in conjunction with our financial statements and notes thereto and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in this report.

The consolidated balance sheet data as of December 31, 2019, 2018, 2017 and 2016, the consolidated statement of operations data for all periods presented and the consolidated statement of cash flows data for the years ended December 31, 2019, 2018 and 2017 have been derived from the historical consolidated financial statements of Kilroy Realty, L.P. audited by an independent registered public accounting firm. The consolidated balance sheet data as of December 31, 2015 and the consolidated statement of cash flows data for the years ended December 31, 2016 and 2015 have been derived from the historical consolidated financial statements of Kilroy Realty, L.P. and adjusted for the impact of subsequent accounting changes requiring retrospective application, if any.

Kilroy Realty, L.P. Consolidated

(in thousands, except unit, per unit, square footage and occupancy data)

	Year Ended December 31,
	2019		2018		2017		2016		2015
Statements of Operations Data:
Total revenues from continuing operations	$	837,454	$	747,298	$	719,001	$	642,572	$	581,275
Income from continuing operations	215,229		277,926		180,615		303,798		238,604
Net income available to common unitholders	198,738		263,210		154,077		286,813		224,887
Per Unit Data:
Weighted average common units outstanding – basic	105,223,975		102,025,276		100,246,567		94,771,688		91,645,578
Weighted average common units outstanding – diluted	105,872,575		102,535,282		100,860,337		95,452,239		92,187,257
Income from continuing operations available to common unitholders per common unit – basic	$	1.87	$	2.56	$	1.52	$	2.99	$	2.44
Income from continuing operations available to common unitholders per common unit – diluted	$	1.86	$	2.55	$	1.51	$	2.96	$	2.42
Net income available to common unitholders per unit – basic	$	1.87	$	2.56	$	1.52	$	2.99	$	2.44
Net income available to common unitholders per unit – diluted	$	1.86	$	2.55	$	1.51	$	2.96	$	2.42
Distributions declared per common unit (1)	$	1.910	$	1.790	$	1.650	$	3.375	$	1.400

 ________________________

(1) The year ended December 31, 2016 includes a special distribution of $1.90 per common unit that was paid on January 13, 2017.

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	December 31,
	2019			2018			2017			2016			2015
Balance Sheet Data:
Total real estate held for investment, before accumulated depreciation and amortization	$	9,628,773		$	8,426,632		$	7,417,777		$	7,060,754		$	6,328,146
Total assets (1) (2)	8,900,094			7,765,707			6,802,838			6,706,633			5,926,430
Total debt (1)	3,552,778			2,932,601			2,347,063			2,320,123			2,225,469
Total preferred capital	—			—			—			192,411			192,411
Total noncontrolling interests (3)	201,100			197,561			186,375			135,138			10,566
Total capital (3)	4,570,858			4,201,261			3,960,316			3,759,317			3,234,586
Other Data:
Cash flows provided by (used in):
Operating activities	386,521			410,043			347,012			345,054			272,008
Investing activities (4)	(1,228,279		)	(808,915		)	(359,102		)	(579,420		)	(337,241		)
Financing activities	747,068			503,108			(171,241		)	427,291			23,471
Office Property Data:
Rentable square footage	13,475,795			13,232,580			13,720,597			14,025,856			13,032,406
Occupancy	94.6		%	94.4		%	95.2		%	96		%	94.8		%
Residential Property Data:
Number of units	200			200			200			200			N/A
Average occupancy (5)	82.4		%	79.7		%	70.2		%	46.0		%	N/A

_______________________

(1) On January 1, 2016, the Company adopted FASB ASU No. 2015-03 and 2015-15 which require deferred financing costs, except costs paid for the unsecured line of credit, to be reclassified as a reduction to the debt liability balance instead of being reported as an asset as historically presented. As a result, total assets and total debt have been adjusted from prior amounts reported to reflect this change for all periods presented.

(2) On January 1, 2019, the Company adopted FASB Topic 842 and recorded right of use ground lease assets on its consolidated balance sheets. As of December 31, 2019, the consolidated balance sheets included $96.3 million of right of use ground lease assets and $98.4 million of ground lease liabilities.

(3) Includes the noncontrolling interests in consolidated property partnerships and subsidiaries (see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report for additional information).

(4) On January 1, 2017, the Company adopted FASB ASU No. 2016-18 which requires that a statement of cash flows explain the change during the period in the total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. As a result, cash flows provided by (used in) investing activities have been adjusted from prior amounts reported to reflect this change for all periods presented.

(5) For the year ended December 31, 2016, represents occupancy at December 31, 2016.

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion relates to our consolidated financial statements and should be read in conjunction with the financial statements and notes thereto appearing elsewhere in this report. The results of operations discussion is combined for the Company and the Operating Partnership because there are no material differences in the results of operations between the two reporting entities.

Forward-Looking Statements

Statements contained in this “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” that are not historical facts may be forward-looking statements. Forward-looking statements include, among other things, statements or information concerning our plans, objectives, capital resources, portfolio performance, results of operations, projected future occupancy and rental rates, lease expirations, debt maturities, potential investments, strategies such as capital recycling, development and redevelopment activity, projected construction costs, projected construction commencement and completion dates, projected square footage of space that could be constructed on undeveloped land that we own, projected rentable square footage of or number of units in properties under construction or in the development pipeline, anticipated proceeds from capital recycling activity or other dispositions and anticipated dates of those activities or dispositions, projected increases in the value of properties, dispositions, future executive incentive compensation, pending, potential or proposed acquisitions, plans to grow our Net Operating Income and FFO, our ability to re-lease properties at or above current market rates, anticipated market conditions and demographics and other forward-looking financial data, as well as the discussion in “—Factors That May Influence Future Results of Operations,” “—Liquidity and Capital Resource of the Company,” and “—Liquidity and Capital Resources of the Operating Partnership.” Forward-looking statements can be identified by the use of words such as “believes,” “expects,” “projects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” and the negative of these words and phrases and similar expressions that do not relate to historical matters. Forward-looking statements are based on our current expectations, beliefs and assumptions, and are not guarantees of future performance. Forward-looking statements are inherently subject to uncertainties, risks, changes in circumstances, trends and factors that are difficult to predict, many of which are outside of our control. Accordingly, actual performance, results and events may vary materially from those indicated or implied in the forward-looking statements, and you should not rely on the forward-looking statements as predictions of future performance, results or events. Numerous factors could cause actual future performance, results and events to differ materially from those indicated in the forward-looking statements, including, among others:

• global market and general economic conditions and their effect on our liquidity and financial conditions and those of our tenants;

• adverse economic or real estate conditions generally, and specifically, in the States of California and Washington;

• risks associated with our investment in real estate assets, which are illiquid, and with trends in the real estate industry;

• defaults on or non-renewal of leases by tenants;

• any significant downturn in tenants’ businesses;

• our ability to re-lease property at or above current market rates;

• costs to comply with government regulations, including environmental remediations;

• the availability of cash for distribution and debt service and exposure to risk of default under debt obligations;

• increases in interest rates and our ability to manage interest rate exposure;

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• the availability of financing on attractive terms or at all, which may adversely impact our future interest expense and our ability to pursue development, redevelopment and acquisition opportunities and refinance existing debt;

• a decline in real estate asset valuations, which may limit our ability to dispose of assets at attractive prices or obtain or maintain debt financing, and which may result in write-offs or impairment charges;

• significant competition, which may decrease the occupancy and rental rates of properties;

• potential losses that may not be covered by insurance;

• the ability to successfully complete acquisitions and dispositions on announced terms;

• the ability to successfully operate acquired, developed and redeveloped properties;

• the ability to successfully complete development and redevelopment projects on schedule and within budgeted amounts;

• delays or refusals in obtaining all necessary zoning, land use and other required entitlements, governmental permits and authorizations for our development and redevelopment properties;

• increases in anticipated capital expenditures, tenant improvement and/or leasing costs;

• defaults on leases for land on which some of our properties are located;

• adverse changes to, or enactment or implementations of, tax laws or other applicable laws, regulations or legislation, as well as business and consumer reactions to such changes;

• risks associated with joint venture investments, including our lack of sole decision-making authority, our reliance on co-venturers’ financial condition and disputes between us and our co-venturers;

• environmental uncertainties and risks related to natural disasters; and

• our ability to maintain our status as a REIT.

The factors included in this report are not exhaustive and additional factors could adversely affect our business and financial performance. For a discussion of additional factors that could materially adversely affect the Company’s and the Operating Partnership’s business and financial performance, see the discussion below as well as “Item 1A. Risk Factors,” and in our other filings with the SEC. All forward-looking statements are based on information that was available and speak only as of the dates on which they were made. We assume no obligation to update any forward-looking statement that becomes untrue because of subsequent events, new information or otherwise, except to the extent we are required to do so in connection with our ongoing requirements under federal securities laws.

Company Overview

We are a self-administered REIT active in premier office and mixed-use submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Greater Los Angeles, San Diego County, the San Francisco Bay Area and Greater Seattle, which we believe have strategic advantages and strong barriers to entry. We own our interests in all of our real properties through the Operating Partnership and the Finance Partnership and generally conduct substantially all of our operations through the Operating Partnership. We owned an approximate 98.1% and 98.0% general partnership interest in the Operating Partnership as of December 31, 2019 and 2018, respectively. All of our properties are held in fee except for the fourteen office buildings that are held subject to long-term ground leases for the land (see Note 18 “Commitments and Contingencies”

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to our consolidated financial statements included in this report for additional information regarding our ground lease obligations).

2019 Operating and Development Highlights

2019 was a terrific year across the Company. We achieved another Company record in annual leasing and continued to create value in our operating and development platforms that we believe will drive future earnings and dividend growth.

Leasing. During 2019, we executed new and renewal leases totaling 1.8 million square feet within our stabilized portfolio with an increase in GAAP rents of 52.3% and an increase in cash rents of 29.6%. Our stabilized office portfolio was 94.6% occupied and 97.0% leased as of December 31, 2019. We also signed approximately 1.7 million square feet of leases in our development portfolio.

Development. We continued to execute on our development program during 2019. We added one completed development project to our stabilized portfolio, completed construction on 237 residential units, commenced revenue recognition on the first two phases of a development project in the tenant improvement phase, had one development project progress from the under construction phase to the tenant improvement phase, commenced construction on three projects and acquired two development sites in two transactions for approximately $173.0 million. See “—Factors that May Influence Future Operations” for additional information regarding our development program.

Capital Recycling Program. We have continued to utilize our capital recycling program to provide additional capital to finance development expenditures, fund potential acquisitions, repay long-term debt and for other general corporate purposes. Our general strategy is to target the disposition of non-core properties or those that have limited upside for us and redeploy the capital into acquisitions and/or development projects where we can create additional value to generate higher returns (see “—Factors that May Influence Future Operations” for additional information). In connection with this strategy, during 2019, we generated gross sales proceeds totaling approximately $133.8 million through the sale of two office buildings.

Operating Property Acquisitions. We remain a disciplined and opportunistic buyer of office properties and development opportunities and continue to focus on value-add opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, health care, life sciences, entertainment and professional services companies. During 2019, we acquired a 19-building creative office campus in Culver City, California in one transaction totaling 151,908 square feet of space for a total cash purchase price of approximately $186.0 million.

2019 Financing Highlights

In 2019, we raised approximately $500.0 million in new debt and settled the 2018 forward equity sale agreements by issuing 5,000,000 shares of common stock for net proceeds of $354.3 million. In addition, we executed forward equity sale agreements to sell 3,147,110 shares of common stock under our at-the-market stock offering program, which we expect to fully settle in the first quarter of 2020 through the first quarter of 2021 at this time. Refer to our 2019 Financing Highlights in “—Liquidity and Capital Resources of the Operating Partnership” for a list of financing transactions completed in 2019 and Notes 9 and 13, “Secured and Unsecured Debt of the Operating Partnership” and “Stockholders’ Equity of the Company,” respectively, to our consolidated financial statements included in this report for additional information regarding our debt and capital market activity.

Critical Accounting Policies

The preparation of financial statements in conformity with GAAP requires us to make estimates, assumptions, and judgments that affect the reported amounts of assets, liabilities, and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the reporting periods.

Certain accounting policies are considered to be critical accounting policies. Critical accounting policies are those policies that require our management team to make significant estimates and/or assumptions about matters that are

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uncertain at the time the estimates and/or assumptions are made or where we are required to make significant judgments and assumptions with respect to the practical application of accounting principles in our business operations. Critical accounting policies are by definition those policies that are material to our financial statements and for which the impact of changes in estimates, assumptions, and judgments could have a material impact to our financial statements.

The following critical accounting policies discussion reflects what we believe are the most significant estimates, assumptions, and judgments used in the preparation of our consolidated financial statements. This discussion of our critical accounting policies is intended to supplement the description of our accounting policies in the footnotes to our consolidated financial statements and to provide additional insight into the information used by management when evaluating significant estimates, assumptions, and judgments. For further discussion of our significant accounting policies, see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report.

Revenue Recognition

Rental revenue for office and retail operating properties is our principal source of revenue. We recognize revenue from base rent, additional rent (which consists of amounts due from tenants for common area maintenance, real estate taxes and other recoverable costs), parking and other lease-related revenue once all of the following criteria are met: (i) the agreement has been fully executed and delivered, (ii) services have been rendered, (iii) the amount is fixed or determinable and (iv) payment has been received or the collectability of the amount due is probable. Lease termination fees are amortized over the remaining lease term, if applicable. If there is no remaining lease term, they are recognized when received and realized. Minimum annual rental revenues are recognized in rental revenues on a straight-line basis over the non-cancellable term of the related lease.

Base Rent

The timing of when we commence rental revenue recognition for office and retail properties depends largely on our conclusion as to whether we are or the tenant is the owner for accounting purposes of tenant improvements at the leased property. When we conclude that we are the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements as an asset and commence rental revenue recognition when the tenant takes possession of or controls the finished space, which is generally when tenant improvements being recorded as our assets are substantially complete. In certain instances, when we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, rental revenue recognition begins when the tenant takes possession or controls the physical use of the leased space, which may occur in phases or for an entire building or project. The determination of who owns the tenant improvements is made on a lease-by-lease basis and has a significant effect on the timing of commencement of revenue recognition.

The determination of whether we are or the tenant is the owner of tenant improvements for accounting purposes is subject to significant judgment. In making that determination, we consider numerous factors and perform a detailed evaluation of each individual lease. No one factor is determinative in reaching a conclusion. The factors we evaluate include but are not limited to the following:

• whether the lease agreement requires landlord approval of how the tenant improvement allowance is spent prior to installation of the tenant improvements;

• whether the lease agreement requires the tenant to provide evidence to the landlord supporting the cost and what the tenant improvement allowance was spent on prior to payment by the landlord for such tenant improvements;

• whether the tenant improvements are unique to the tenant or reusable by other tenants;

• whether the tenant is permitted to alter or remove the tenant improvements without the consent of the landlord or without compensating the landlord for any lost utility or diminution in fair value; and

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• whether the ownership of the tenant improvements remains with the landlord or remains with the tenant at the end of the lease term.

When we conclude that we are the owner of tenant improvements for accounting purposes using the factors discussed above, we record the cost to construct the tenant improvements, including costs paid for or reimbursed by the tenants, as a capital asset. During the years ended December 31, 2019, 2018, and 2017, we capitalized $12.0 million, $22.5 million and $22.0 million, respectively, of tenant-funded tenant improvements. The amount of tenant-funded tenant improvements recorded in any given year varies based upon the mix of specific leases executed and/or commenced during the reporting period. For these tenant-funded tenant improvements, we record the amount funded by or reimbursed by tenants as deferred revenue, which is amortized and recognized as rental income on a straight-line basis over the term of the related lease beginning upon substantial completion of the leased premises. The determination of who owns the tenant improvements has a significant impact on the amount of non-cash rental revenue that we record related to the amortization of deferred revenue for tenant-funded tenant improvements. For the years ended December 31, 2019, 2018, and 2017, we recognized $19.2 million, $18.4 million and $16.8 million, respectively, of non-cash rental revenue related to the amortization of deferred revenue recorded in connection with tenant-funded tenant improvements.

When we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, we record our contribution towards those tenant-owned improvements as a lease incentive, which is included in deferred leasing costs and acquisition-related intangible assets, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease.

For residential properties, we commence revenue recognition upon lease commencement. Residential rental revenue is recognized on a straight-line basis over the term of the related lease, net of any concessions.

Additional Rent - Reimbursements from Tenants

Additional rent, consisting of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs, are recognized in rental income in the period the recoverable costs are incurred. Prior to the adoption of Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-02 “Leases (Topic 842)” (“Topic 842”) on January 1, 2019, such amounts were recognized in revenue as tenant reimbursements. Additional rent where we pay the associated costs directly to third-party vendors and are reimbursed by our tenants are recognized and recorded on a gross basis, with the corresponding expense recognized in property expenses or real estate taxes. Prior to the adoption of Topic 842, recoverable costs were generally recognized and recorded on a gross basis when we were the primary obligor with respect to purchasing goods and services from third-party suppliers, had discretion in selecting the supplier, and had credit risk.

Calculating additional rent requires an in-depth analysis of the complex terms of each underlying lease. Examples of judgments and estimates used when determining the amounts recoverable include:

• estimating the final expenses, net of accruals, that are recoverable;

• estimating the fixed and variable components of operating expenses for each building;

• conforming recoverable expense pools to those used in establishing the base year or base allowance for the applicable underlying lease; and

• concluding whether an expense or capital expenditure is recoverable pursuant to the terms of the underlying lease.

During the year, we accrue estimated additional rent in the period in which the recoverable costs are incurred based on our best estimate of the amounts to be recovered. Throughout the year, we perform analyses to properly match additional rent with reimbursable costs incurred to date. Additionally, during the fourth quarter of each year, we perform preliminary reconciliations and accrue additional rent or refunds. Subsequent to year end, we perform final detailed reconciliations and analyses on a lease-by-lease basis and bill or refund each tenant for any cumulative annual

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adjustments in the first and second quarters of each year for the previous year’s activity. Our historical experience for the years ended December 31, 2018 and 2017 has been that our final reconciliation and billing process resulted in final amounts that approximated the total annual additional rent recognized.

Uncollectible Lease Receivables and Allowances for Tenant and Deferred Rent Receivables

We carry our current and deferred rent receivables net of allowances for amounts that may not be collected. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations. Upon the adoption of Topic 842 on January 1, 2019, the allowances are increased or decreased through rental income, and our determination of the adequacy of the Company’s allowances for tenant receivables includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. Such assessment involves using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Since these factors are beyond our control, actual results can differ from our estimates, and such differences could be material. For leases that are deemed probable of collection, revenue continues to be recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination.

For tenant and deferred rent receivables associated with leases whose rents are deemed probable of collection, we may record an allowance under other authoritative GAAP using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Since these factors are beyond our control, actual results can differ from our estimates, and such differences could be material. Tenant and deferred rent receivables deemed probable of collection are carried net of allowances for uncollectible accounts, with increases or decreases in the allowances recorded through rental income on our consolidated statements of operations. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations.

Current tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. With respect to the allowance for uncollectible tenant receivables, the specific identification methodology analysis relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, our assessment of the tenant’s ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant.

Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds cash rents billed to date under the lease agreement. With respect to the allowance for deferred rent receivables, given the longer-term nature of these receivables, the specific identification methodology analysis evaluates each of our significant tenants and any tenants on our internal watchlist and relies on factors such as each tenant’s financial condition and its ability to meet its lease obligations. We evaluate our reserve levels quarterly based on changes in the financial condition of tenants and our assessment of the tenant’s ability to meet its lease obligations, overall economic conditions, and the current business environment.

For the years ended December 31, 2019, 2018 and 2017, we recorded a total allowance for uncollectible accounts for both current tenant receivables and deferred rent receivables of approximately 0.3%, 0.4% and 0.5%, respectively, of total revenues. In addition, for the years ended December 31, 2019 and 2018, we recorded an additional provision for uncollectible accounts of approximately 0.1% and 0.4%, respectively, of total revenues related to a note receivable. In the event our estimates were not accurate and we had to change our allowances by 1% of revenue from continuing operations, the potential impact to our net income available to common stockholders would be approximately $8.4 million, $7.5 million and $7.2 million for the years ended December 31, 2019, 2018 and 2017, respectively.

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Acquisitions

Acquisitions of operating properties and development and redevelopment opportunities generally do not meet the definition of a business and are accounted for as asset acquisitions, as substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. For these asset acquisitions, we record the acquired tangible and intangible assets and assumed liabilities based on each asset’s and liability’s relative fair value at the acquisition date of the total purchase price plus any capitalized acquisition costs.

We assess and consider fair value based on estimated cash flow projections that utilize available market information and discount and/or capitalization rates that we deem appropriate. Estimates of future cash flows are based on a number of factors including historical operating results, known and anticipated trends, and market and economic conditions. The acquired assets and assumed liabilities for an operating property acquisition generally include but are not limited to: land and improvements, buildings and improvements, construction in progress and identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market operating leases and ground leases, acquired in-place lease values and tenant relationships, if any.

The fair value of land and improvements is derived from comparable sales of land and improvements within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements and leasing costs considers the value of the property as if it was vacant as well as current replacement costs and other relevant market rate information.

The fair value of the above-market or below-market component of an acquired in-place operating lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining non-cancellable lease term and (ii) management’s estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition measured over the remaining non-cancellable term of the lease for above-market operating leases and the initial non-cancellable term plus the term of any below-market fixed rate renewal options, if applicable, for below-market operating leases. The amounts recorded for above-market operating leases are included in deferred leasing costs and acquisition-related intangible assets, net on the balance sheet and are amortized on a straight-line basis as a reduction of rental income over the remaining term of the applicable leases. The amounts recorded for below-market operating leases are included in deferred revenue and acquisition-related liabilities, net on the balance sheet and are amortized on a straight-line basis as an increase to rental income over the remaining term of the applicable leases plus the term of any below-market fixed rate renewal options, if applicable. Our below-market operating leases generally do not include fixed rate or below-market renewal options. If a lease were to be terminated or if termination were determined to be likely prior to its contractual expiration (for example resulting from bankruptcy), amortization of the related above-market or below-market lease intangible would be accelerated.

The fair value of acquired in-place leases is derived based on management’s assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. This fair value is based on a variety of considerations including, but not necessarily limited to: (1) the value associated with avoiding the cost of originating the acquired in-place leases; (2) the value associated with lost revenue related to tenant reimbursable operating costs estimated to be incurred during the assumed lease-up period; and (3) the value associated with lost rental revenue from existing leases during the assumed lease-up period. Factors we consider in performing these analyses include an estimate of the carrying costs during the expected lease-up periods, current market conditions, and costs to execute similar leases. In estimating carrying costs, we include real estate taxes, insurance and other operating expenses, and estimates of lost rental revenue during the expected lease-up periods based on current market demand at market rates. In estimating costs to execute similar leases, we consider leasing commissions, legal and other related expenses. The amount recorded for acquired in-place leases is included in deferred leasing costs and acquisition-related intangible assets, net on the balance sheet and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. If a lease were to be terminated or if termination were determined to be likely prior to its contractual expiration (for example resulting from bankruptcy), amortization of the related unamortized in-place lease intangible would be accelerated.

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The determination of the fair value of any debt assumed in connection with a property acquisition is estimated by discounting the future cash flows using interest rates available for the issuance of debt with similar terms and remaining maturities.

The determination of the fair value of the acquired tangible and intangible assets and assumed liabilities of acquisitions requires us to make significant judgments and assumptions about the numerous inputs discussed above. The use of different assumptions in these fair value calculations could significantly affect the reported amounts of the allocation of our acquisition related assets and liabilities and the related depreciation and amortization expense recorded for such assets and liabilities. In addition, because the value of above and below market leases are amortized as either a reduction or increase to rental income, respectively, our judgments for these intangibles could have a significant impact on our reported rental revenues and results of operations.

Transaction costs associated with our acquisitions are capitalized as part of the purchase price of the acquisition. During the years ended December 31, 2019, 2018 and 2017, we capitalized $1.6 million, $3.8 million, and $4.6 million, respectively, of acquisition costs.

Evaluation of Asset Impairment

We evaluate our real estate assets for potential impairment whenever events or changes in circumstances indicate that the carrying amount of a given asset may not be recoverable. We evaluate our real estate assets for impairment on a property-by-property basis. Indicators we use to determine whether an impairment evaluation is necessary include:

• low occupancy levels, forecasted low occupancy levels or near term lease expirations at a specific property;

• current period operating or cash flow losses combined with a historical pattern or future projection of potential continued operating or cash flow losses at a specific property;

• deterioration in rental rates for a specific property as evidenced by sudden significant rental rate decreases or continuous rental rate decreases over numerous quarters, which could signal a continued decrease in future cash flow for that property;

• deterioration of a given rental submarket as evidenced by significant increases in market vacancy and/or negative absorption rates or continuous increases in market vacancy and/or negative absorption rates over numerous quarters, which could signal a decrease in future cash flow for properties within that submarket;

• significant increases in property sales yields, continuous increases in property sales yields over several quarters, or recent property sales at a loss within a given submarket, each of which could signal a decrease in the market value of properties;

• significant change in strategy or use of a specific property or any other event that could result in a decreased holding period, including classifying a property as held for sale, or significant development delay;

• evidence of material physical damage to the property; and

• default by a significant tenant when any of the other indicators above are present.

When we evaluate for potential impairment our real estate assets to be held and used, we first evaluate whether there are any indicators of impairment. If any impairment indicators are present for a specific real estate asset, we then perform an undiscounted cash flow analysis and compare the net carrying amount of the real estate asset to the real estate asset’s estimated undiscounted future cash flow over the anticipated holding period. If the estimated undiscounted future cash flow is less than the net carrying amount of the real estate asset, we perform an impairment loss calculation to determine if the fair value of the real estate asset is less than the net carrying value of the real estate asset. Our impairment loss calculation compares the net carrying amount of the real estate asset to the real estate asset’s estimated fair value, which may be based on estimated discounted future cash flow calculations or third-party valuations or appraisals. We recognize an impairment loss if the amount of the asset’s net carrying amount exceeds the asset’s

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estimated fair value. If we recognize an impairment loss, the estimated fair value of the asset becomes its new cost basis. For a depreciable long-lived asset, the new cost basis would be depreciated (amortized) over the remaining useful life of that asset. If a real estate asset is designated as real estate held for sale, it is carried at the lower of the net carrying value or estimated fair value less costs to sell, and depreciation ceases.

Our undiscounted cash flow and fair value calculations contain uncertainties because they require management to make assumptions and to apply judgment to estimate future cash flow and property fair values, including determining our estimated holding period and selecting the discount or capitalization rate that reflects the risk inherent in future cash flow. Estimating projected cash flow is highly subjective as it requires assumptions related to future rental rates, tenant allowances, operating expenditures, property taxes, capital improvements, and occupancy levels. We are also required to make a number of assumptions relating to future economic and market events and prospective operating trends. Determining the appropriate capitalization rate also requires significant judgment and is typically based on many factors including the prevailing rate for the market or submarket, as well as the quality and location of the properties. Further, capitalization rates can fluctuate resulting from a variety of factors in the overall economy or within regional markets. If the actual net cash flow or actual market capitalization rates significantly differ from our estimates, the impairment evaluation for an individual asset could be materially affected.

For each property where such an indicator occurred and/or for properties within a given submarket where such an indicator occurred, we completed an impairment evaluation. After completing this process, we determined that for each of the operating properties evaluated, undiscounted cash flows over the holding period were in excess of carrying value and, therefore, we did not record any impairment losses for these properties.

Cost Capitalization and Depreciation

We capitalize costs associated with development and redevelopment activities, capital improvements, and tenant improvements, including internal compensation costs. For the years ended December 31, 2019, 2018 and 2017, we capitalized $25.6 million, $24.2 million and $23.2 million, respectively, of internal costs to our qualifying development projects. In addition, for development and redevelopment projects, we also capitalize the following costs during periods in which activities necessary to prepare the project for its intended use are in progress: interest costs based on the weighted average interest rate of our outstanding indebtedness for the period, real estate taxes and insurance.

Amounts capitalized are depreciated or amortized over estimated useful lives determined by management. We depreciate buildings and improvements based on the estimated useful life of the asset, and we amortize tenant improvements over the shorter of the estimated useful life or estimated remaining life of the related lease. All capitalized costs are depreciated or amortized using the straight-line method.

Determining whether expenditures meet the criteria for capitalization and the assignment of depreciable lives requires management to exercise significant judgment. Expenditures that meet one or more of the following criteria generally qualify for capitalization:

• provide benefit in future periods;

• extend the useful life of the asset beyond our original estimates; and

• increase the quality of the asset beyond our original estimates.

Our historical experience has demonstrated that we have not had material write-offs of assets and that our depreciation and amortization estimates have been reasonable and appropriate.

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Share-Based Incentive Compensation Accounting

At December 31, 2019, the Company had one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan, which is described more fully in Note 15 “Share-Based Compensation” to our consolidated financial statements included in this report. The Executive Compensation Committee determines compensation for executive officers, as defined in Rule 16 under the Exchange Act. Compensation cost for all share-based awards, including options, requires an estimate of fair value on the grant date and compensation cost is recognized on a straight-line basis over the service vesting period, which represents the requisite service period. The grant date fair value for compensation programs that contain market conditions, like modifiers based on total stockholder return (a “market condition”), are performed using complex pricing valuation models that require the input of assumptions, including judgments to estimate expected stock price volatility, expected life, and forfeiture rate. Specifically, the grant date fair value of share-based compensation programs that include market conditions are calculated using a Monte Carlo simulation pricing model and the grant date fair value of stock option grants are calculated using the Black-Scholes valuation model. Additionally, certain of our market condition share-based compensation programs also contain pre-defined financial performance conditions, including FFO per share, FAD per share growth, and debt to EBITDA ratio goals which can impact the number of restricted stock units ultimately earned. This variability relating to the level of the performance condition achieved requires management’s judgment and estimates, which impacts compensation cost recognized for these awards during the performance period. As of December 31, 2019, the performance condition for certain of our outstanding market condition share-based compensation programs has been met and compensation cost for these awards is no longer variable. For these awards, although the number of restricted stock units ultimately earned remains variable subject to the ultimate achievement level of the market condition, compensation cost is no longer variable for these awards as the market condition was already taken into consideration as part of the grant date fair value calculation. As of December 31, 2019, there are certain outstanding share-based compensation awards where the performance conditions have not all yet been met. For these awards, compensation cost and the number of restricted stock units ultimately earned remains variable and compensation cost for these awards is recorded based the estimated level of achievement of the performance conditions through the requisite service period. Changes to compensation cost resulting from changes in the estimated level of achievement of the performance conditions are recorded as cumulative adjustments in the period the change in the estimated level of achievement of the performance conditions is determined.

For the years ended December 31, 2019, 2018, and 2017 we recorded approximately $18.1 million, $23.5 million, and $14.5 million, respectively, of compensation cost related to programs that were subject to such valuation models. If the valuation of the grant date fair value for such programs changed by 10%, the potential impact to our net income available to common stockholders would be approximately $1.6 million, $2.0 million, and $1.1 million for the years ended December 31, 2019, 2018, and 2017, respectively.

Factors That May Influence Future Results of Operations

Development Program

We believe that a portion of our long-term future growth will continue to come from the completion of our in-process development projects and, subject to market conditions, executing on our future development pipeline, including expanding entitlements. Over the past several years, we increased our focus on development opportunities and expanded our future development pipeline through targeted acquisitions of development opportunities on the West Coast. This includes the acquisitions of two development sites in two separate transactions for a total cash purchase price of approximately $173.0 million in 2019, as discussed in “—Acquisitions” below.

We have a proactive planning process by which we continually evaluate the size, timing, costs and scope of our development program and, as necessary, scale activity to reflect the economic conditions and the real estate fundamentals that exist in our submarkets. We expect to execute on our development program with prudence and will be pursuing opportunities with attractive economic returns in strategic locations with proximity to public transportation or transportation access and retail amenities and in markets with strong fundamentals and visible demand. We plan to develop in phases as appropriate and we generally favor starting projects with pre-leasing activity, as appropriate.

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Stabilized Development Projects

During the year ended December 31, 2019, we added the following project to our stabilized portfolio:

• 100 Hooper, SOMA, San Francisco, California, which we commenced construction on in November 2016. This project encompasses 311,859 square feet of office and 82,481 square feet of production, distribution and repair (“PDR”) space spanning two buildings with a total estimated investment of approximately $275.0 million. The office portion of the project is 100% leased and occupied by Adobe Systems Inc. and the PDR space is 86% leased as of the date of this report. We commenced revenue recognition on the lease with Adobe Systems Inc. on October 1, 2018. Cash rents on Phase I of the lease commenced in March 2019 and cash rents on the remaining phases will commence through the second quarter of 2020.

Completed Residential Development Projects

During the year ended December 31, 2019, we completed the first phase of the following residential development project:

• One Paseo (Residential Phase I) - Del Mar, San Diego, California. We commenced construction on the first phase of the residential component of this mixed-use project in December 2016, which includes 237 residential units. The total estimated investment for this phase of the residential component of the project is approximately $145.0 million. As of the date of this report, 66% of the units have been leased.

In-Process Development Projects - Tenant Improvement

As of December 31, 2019, the following development projects were in the tenant improvement phase:

• The Exchange on 16th, Mission Bay, San Francisco, California. We commenced construction on this project in June 2015. This project totals approximately 750,000 gross rentable square feet consisting of 738,000 square feet of office space and 12,000 square feet of retail space at a total estimated investment of $585.0 million. The office space in the project is 100% leased to Dropbox, Inc. During the year ended December 31, 2019, we completed construction and commenced revenue recognition on the first phase of the project in the second quarter of 2019 and on the second phase of the project in the fourth quarter of 2019, totaling approximately 82% of the project. The remaining space is currently expected to stabilize in the third quarter of 2020. Cash rents on the project will continue to commence through the first quarter of 2020.

• One Paseo (Retail) - Del Mar, San Diego, California. We commenced construction on the retail component of this mixed-use project in December 2016, which is comprised of approximately 96,000 square feet of retail space with a total estimated investment of $100.0 million. As of the date of this report, the retail space of the project was 100% leased and 89% occupied. This project will be added to our stabilized portfolio in the first quarter of 2020.

In-Process Development Projects - Under Construction

As of December 31, 2019, we had six projects in our in-process development pipeline that were under construction.

• Kilroy Oyster Point (Phase I), South San Francisco, California. In March 2019, we commenced construction on Phase I of this 39-acre life science campus situated on the waterfront in South San Francisco. This first phase encompasses approximately 656,000 square feet of office space at a total estimated investment of $570.0 million. In 2019, we executed two 12-year leases for 100% of Phase I of the project. We currently expect this project to stabilize in the fourth quarter of 2021.

• 9455 Towne Centre Drive, University Towne Center, San Diego, California. In March 2019, we commenced construction on this project which totals approximately 160,000 square feet of office space at a total estimated investment of $110.0 million. In December 2019, we executed a long-term lease with a major technology company for 100% of the project. We currently expect this project to stabilize in the first quarter of 2021.

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• Netflix & Living // On Vine, Hollywood, California. We commenced construction on the office component of this mixed-use project in January 2018, which includes the project’s overall infrastructure and site work and approximately 355,000 square feet of office space for a total estimated investment of $300.0 million. The office space of this project is 100% leased to Netflix, Inc. We commenced construction on the residential component of the project in December 2018, which encompasses 193 residential units at a total estimated investment of $195.0 million. We currently expect this project to stabilize in the first quarter of 2021, and the residential component is currently expected to be completed in the fourth quarter of 2020.

• 333 Dexter, South Lake Union, Seattle, Washington. We commenced construction on this project in June 2017. This project encompasses approximately 635,000 square feet of office space at a total estimated investment of $410.0 million. During the year ended December 31, 2019, we executed a lease for 100% of the project with a Fortune 50 publicly traded company. Construction is currently in progress and the project is currently estimated to move into the tenant improvement phase in the first quarter of 2020 and stabilize in the second half of 2022.

• One Paseo (Residential Phases II and III and Office) - Del Mar, San Diego, California. We commenced construction on the residential component of this mixed-use project in December 2016 of which Phases II and III comprise 371 residential units. The total estimated investment for Phases II and III of the residential component of the project is approximately $230.0 million. Phases II and III are expected to be completed and delivered in phases during the first half of 2020. We commenced construction on the office component of the project in December 2018, which encompasses 285,000 square feet of office space at a total estimated investment of $205.0 million. As of the date of this report, the office component of the project was 80% leased. We currently expect the project to stabilize in the second quarter of 2021.

• 2100 Kettner, Little Italy, San Diego, California. We commenced construction on this project in September 2019. This project is comprised of approximately 200,000 square feet of office space for a total estimated investment of $140.0 million.

Future Development Pipeline

As of December 31, 2019, our future development pipeline included five future projects located in Greater Seattle, the San Francisco Bay Area and San Diego County with an aggregate cost basis of approximately $985.7 million, at which we believe we could develop more than 6.0 million rentable square feet for a total estimated investment of approximately $5.0 billion to $7.0 billion, depending on successfully obtaining entitlements and market conditions.

The following table sets forth information about our future development pipeline.

Future Development Pipeline	Location	Approx. Developable Square Feet (1)	Total Costs as of 12/31/2019 ($ in millions)(2)
San Diego County
Santa Fe Summit – Phases II and III	56 Corridor	600,000 - 650,000	$	80.4
1335 Broadway & 901 Park Boulevard	East Village	TBD	45.1
San Francisco Bay Area
Kilroy Oyster Point - Phase II - IV	South San Francisco	1,750,000 - 1,900,000	330.5
Flower Mart	SOMA	2,300,000	392.3
Greater Seattle
Seattle CBD Project	Seattle CBD	TBD	137.4
TOTAL:			$	985.7

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(1) The developable square feet and scope of projects could change materially from estimated data provided due to one or more of the following: any significant changes in the economy, market conditions, our markets, tenant requirements and demands, construction costs, new supply, regulatory and entitlement processes or project design.

(2) Represents cash paid and costs incurred, including accrued liabilities in accordance with GAAP, as of December 31, 2019.

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Fluctuations in our development activities could cause fluctuations in the average development asset balances qualifying for interest and other carrying cost and internal cost capitalization in future periods. During the years ended December 31, 2019 and 2018, we capitalized interest on in-process development projects and future development pipeline projects with an average aggregate cost basis of approximately $2.0 billion and $1.6 billion, respectively, as it was determined these projects qualified for interest and other carrying cost capitalization under GAAP. For the years ended December 31, 2019 and 2018, we capitalized $81.2 million and $68.1 million, respectively, of interest to our qualifying development projects. For the years ended December 31, 2019 and 2018, we capitalized $25.6 million and $24.2 million, respectively, of internal costs to our qualifying redevelopment and development projects.

Capital Recycling Program. We continuously evaluate opportunities for the potential disposition of non-core properties and undeveloped land in our portfolio or the formation of strategic ventures with the intent of recycling the proceeds generated into capital used to fund new operating and development acquisitions, to finance development and redevelopment expenditures, to repay long-term debt and for other general corporate purposes. As part of this strategy, we attempt to enter into Section 1031 Exchanges and other tax deferred transaction structures, when possible, to defer some or all of the taxable gains on the sales, if any, for federal and state income tax purposes. See the “Liquidity and Capital Resources of the Operating Partnership – Liquidity Sources” section for further discussion of our capital recycling activities.

In connection with our capital recycling strategy, during 2019, we completed the sale of two office properties to unaffiliated third parties for total gross sales proceeds of $133.8 million. During 2018, we completed the sale of 11 office properties to unaffiliated third parties for total gross sales proceeds of $373.0 million.

The timing of any potential future disposition or strategic venture transactions will depend on market conditions and other factors, including but not limited to our capital needs and our ability to defer some or all of the taxable gains on the sales. We cannot assure that we will dispose of any additional properties, enter into any additional strategic ventures, or that we will be able to identify and complete the acquisition of a suitable replacement property to effect a Section 1031 Exchange or be able to use other tax deferred structures in connection with our strategy. See the “Liquidity and Capital Resources of the Operating Partnership – Liquidity Sources” section for further information.

Acquisitions. As part of our growth strategy, which is highly dependent on market conditions and business cycles, among other factors, we continue to evaluate strategic opportunities and remain a disciplined buyer of development and redevelopment opportunities as well as value-add operating properties.  We continue to focus on growth opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, healthcare, life sciences, entertainment and professional services.  Against the backdrop of market volatility, we expect to manage a strong balance sheet, execute on our development program and selectively evaluate opportunities that either add immediate Net Operating Income to our portfolio or play a strategic role in our future growth.

During the year ended December 31, 2019, we acquired a 19-building creative office campus and two development sites in three transactions for a total cash purchase price of $359.0 million. During the year ended December 31, 2018, we acquired four office buildings in two transactions for a total cash purchase price of $257.0 million and a 39-acre development site for approximately $308.2 million. We generally finance our acquisitions through proceeds from the issuance of debt and equity securities, borrowings under our unsecured revolving credit facility, proceeds from our capital recycling program, the assumption of existing debt and cash flows from operations.

We cannot provide assurance that we will enter into any agreements to acquire properties, or undeveloped land, or that the potential acquisitions contemplated by any agreements we may enter into in the future will be completed. In addition, acquisitions are subject to various risks and uncertainties and we may be unable to complete an acquisition after making a nonrefundable deposit or incurring acquisition-related costs.

Incentive Compensation. Our Executive Compensation Committee determines compensation, including cash bonuses and equity incentives, for our executive officers, as defined in Rule 16 under the Exchange Act. For 2019, the annual cash bonus program was structured to allow the Executive Compensation Committee to evaluate a variety of key quantitative and qualitative metrics at the end of the year and make a determination based on the Company’s and

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management’s overall performance. Our Executive Compensation Committee also grants equity incentive awards from time to time that include performance-based and/or market-measure based vesting requirements and time-based vesting requirements. As a result, accrued incentive compensation and compensation expense for future awards may be affected by our operating and development performance, financial results, stock price, performance against applicable performance-based vesting goals, market conditions, liquidity measures, and other factors. Consequently, we cannot predict the amounts that will be recorded in future periods related to such incentive compensation.

As of December 31, 2019, there was approximately $50.5 million of total unrecognized compensation cost related to outstanding nonvested shares of restricted common stock and RSUs issued under share-based compensation arrangements. Those costs are expected to be recognized over a weighted-average period of 2.1 years. The $50.5 million of unrecognized compensation cost does not reflect the future compensation cost for any potential share-based awards that may be issued subsequent to December 31, 2019. Share-based compensation expense for potential future awards could be affected by our operating and development performance, financial results, stock price, performance against applicable performance-based vesting goals, market conditions and other factors.

Information on Leases Commenced and Executed

Leasing Activity and Changes in Rental Rates. The amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space, newly developed or redeveloped properties, newly acquired properties with vacant space, and space available from unscheduled lease terminations. The amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets. Negative trends in one or more of these factors could adversely affect our rental income in future periods. The following tables set forth certain information regarding leasing activity for our stabilized portfolio during the year ended December 31, 2019.

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For Leases Commenced  

	1st & 2nd Generation (1)(2)						2nd Generation (1)(2)
	Number of Leases (3)		Rentable Square Feet (3)		Retention Rates (4)		TI/LC per Sq. Ft. (5)		TI/LC per Sq. Ft. / Year		Changes in Rents (6)(7)		Changes in Cash Rents (8)		Weighted Average Lease Term (in months)
	New	Renewal	New	Renewal
Year Ended December 31, 2019	70	58	1,440,649	867,514	35.5	%	$	50.49	$	6.45	41.1	%	18.4	%	94

For Leases Executed ⁽⁹⁾ 

	1st & 2nd Generation (1)(2)				2nd Generation (1)(2)
	Number of Leases (3)		Rentable Square Feet (3)		TI/LC per Sq. Ft. (5)		TI/LC Per Sq. Ft. / Year		Changes in Rents (6)(7)		Changes in Cash Rents (8)		Weighted Average Lease Term (in months)
	New	Renewal	New	Renewal
Year Ended December 31, 2019	70	58	964,247	867,514	$	59.01	$	8.64	52.3	%	29.6	%	82

_______________________

(1) Includes 100% of consolidated property partnerships.

(2) First generation leasing includes space where we have made capital expenditures that result in additional revenue generated when the space is re-leased. Second generation leasing includes space where we have made capital expenditures to maintain the current market revenue stream.

(3) Represents leasing activity for leases that commenced or were signed during the period, including first and second generation space, net of month-to-month leases. Excludes leasing on new construction.

(4) Calculated as the percentage of space either renewed or expanded into by existing tenants or subtenants at lease expiration.

(5) Tenant improvements and leasing commissions per square foot exclude tenant-funded tenant improvements.

(6) Calculated as the change between GAAP rents for new/renewed leases and the expiring GAAP rents for the same space. Excludes leases for which the space was vacant longer than one year or vacant when the property was acquired.

(7) Excludes commenced and executed leases of approximately 355,829 and 215,640 rentable square feet, respectively, for the year ended December 31, 2019, for which the space was vacant longer than one year or being leased for the first time. Space vacant for more than one year is excluded from our change in rents calculations to provide a more meaningful market comparison.

(8) Calculated as the change between stated rents for new/renewed leases and the expiring stated rents for the same space. Excludes leases for which the space was vacant longer than one year or vacant when the property was acquired.

(9) For the year ended December 31, 2019, 34 new leases totaling 644,176 rentable square feet were signed but not commenced as of December 31, 2019.

As of December 31, 2019, we believe that the weighted average cash rental rates for our total stabilized portfolio, are approximately 20% below the current average market rental rates. Individual properties within any particular submarket presently may be leased either above, below, or at the current market rates within that submarket, and the average rental rates for individual submarkets may be above, below, or at the average cash rental rate of our portfolio.

Our rental rates and occupancy are impacted by general economic conditions, including the pace of regional economic growth and access to capital. Therefore, we cannot give any assurance that leases will be renewed or that available space will be re-leased at rental rates equal to or above the current market rates. Additionally, decreased demand and other negative trends or unforeseeable events that impair our ability to timely renew or re-lease space could have further negative effects on our future financial condition, results of operations, and cash flows.

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Scheduled Lease Expirations. The following tables set forth certain information regarding our lease expirations for our stabilized portfolio for the next five years and by region for the next two years.

Lease Expirations ⁽¹⁾ 

Year of Lease Expiration	Number of Expiring Leases	Total Square Feet	% of Total Leased Sq. Ft.		Annualized Base Rent (2)(3)		% of Total Annualized Base Rent (2)		Annualized Base Rent per Sq. Ft. (2)
2020 (4)	82	965,896	7.7	%	$	42,648	6.6	%	$	44.15
2021 (4)	80	843,494	6.8	%	36,461		5.6	%	43.23
2022	62	749,273	6.0	%	32,488		5.1	%	43.36
2023	77	1,227,648	9.7	%	64,992		10.1	%	52.94
2024	56	998,249	8.0	%	47,378		7.4	%	47.46
Total	357	4,784,560	38.2	%	$	223,967	34.8	%	$	46.81

Year	Region	# of Expiring Leases	Total Square Feet	% of Total Leased Sq. Ft.		Annualized Base Rent (2)(3)		% of Total Annualized Base Rent (2)		Annualized Rent per Sq. Ft. (2)
2020 (4)	Greater Los Angeles	49	434,475	3.5	%	$	18,226	2.8	%	$	41.95
	San Diego	16	203,510	1.6	%	8,266		1.3	%	40.62
	San Francisco Bay Area	14	241,096	1.9	%	13,662		2.1	%	56.67
	Greater Seattle	3	86,815	0.7	%	2,494		0.4	%	28.73
	Total	82	965,896	7.7	%	$	42,648	6.6	%	$	44.15
2021 (4)	Greater Los Angeles	46	285,425	2.4	%	$	11,636	1.8	%	$	40.77
	San Diego	14	289,457	2.3	%	11,635		1.8	%	40.20
	San Francisco Bay Area	11	239,259	1.9	%	12,245		1.9	%	51.18
	Greater Seattle	9	29,353	0.2	%	945		0.1	%	32.19
	Total	80	843,494	6.8	%	$	36,461	5.6	%	$	43.23

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(1) For leases that have been renewed early with existing tenants, the expiration date and annualized base rent information presented takes into consideration the renewed lease terms. Excludes leases not commenced as of December 31, 2019, space leased under month-to-month leases, storage leases, vacant space and future lease renewal options not executed as of December 31, 2019.

(2) Annualized base rent includes the impact of straight-lining rent escalations and the amortization of free rent periods and excludes the impact of the following: amortization of deferred revenue related tenant-funded tenant improvements, amortization of above/below market rents, amortization for lease incentives due under existing leases, and expense reimbursement revenue. Additionally, the underlying leases contain various expense structures including full service gross, modified gross and triple net. Percentages represent percentage of total portfolio annualized contractual base rental revenue. For additional information on tenant improvement and leasing commission costs incurred by the Company for the current reporting period, please see further discussion under the caption “Information on Leases Commenced and Executed.”

(3) Includes 100% of annualized base rent of consolidated property partnerships.

(4) Adjusting for leases executed as of December 31, 2019 but not yet commenced, the 2020 and 2021 expirations would be reduced by 267,449 and 173,267 square feet, respectively.

In addition to the 0.7 million rentable square feet, or 5.4%, of currently available space in our stabilized portfolio, leases representing approximately 7.7% and 6.8% of the occupied square footage of our stabilized portfolio are scheduled to expire during 2020 and 2021, respectively. The leases scheduled to expire in 2020 and 2021 represent approximately 1.8 million rentable square feet, or 12.2%, of our total annualized base rental revenue. Individual properties within any particular submarket presently may be leased either above, below, or at the current quoted market rates within that submarket. Our ability to re-lease available space depends upon both general market conditions and the market conditions in the specific regions in which individual properties are located.

Approximately 1.0 million rentable square feet, or 6.6%, of our total annualized base rental revenue, and 0.8 million rentable square feet, or 5.6% of our total annualized base rental revenue, is scheduled to expire in 2020 and 2021, respectively. As of December 31, 2019, we had executed leases for 0.3 million and 0.2 million rentable square feet of the expiring 1.0 million and 0.8 million rentable square feet in 2020 and 2021, respectively. For the 0.3 million leased rentable square feet of 2020 expirations, we believe that the weighted average cash rental rates are approximately 20.0% below market. We believe the weighted average cash rental rates for the remaining 0.7 million expiring rentable feet in 2020 are approximately 20% below current average market rental rates. For the 0.2 million leased rentable square

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feet of 2021 expirations, we believe that the weighted average cash rental rates are approximately 75% below market. We believe the weighted average cash rental rates for the remaining 0.6 million expiring rentable feet are approximately 25% below current average market rental rates.

Stabilized Portfolio Information

As of December 31, 2019, our stabilized portfolio was comprised of 112 office properties encompassing an aggregate of approximately 13.5 million rentable square feet and 200 residential units at our residential tower in Hollywood, California. Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently committed for construction, under construction or in the tenant improvement phase, undeveloped land, recently completed residential properties not yet stabilized and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and retail properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets as the historical cost of the property as the projects are placed in service.

We did not have any redevelopment or held for sale properties at December 31, 2019. Our stabilized portfolio also excludes our future development pipeline, which as of December 31, 2019 was comprised of five potential development sites, representing approximately 61 gross acres of undeveloped land on which we believe we have the potential to develop more than 6.0 million rentable square feet, depending upon economic conditions.

As of December 31, 2019, the following properties were excluded from our stabilized portfolio:

	Number of Properties/Projects	Estimated Rentable Square Feet (1) /Units
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

________________________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

The following table reconciles the changes in the rentable square feet in our stabilized office portfolio of operating properties from December 31, 2018 to December 31, 2019:

	Number of Buildings		Rentable Square Feet
Total as of December 31, 2018	94		13,232,580
Acquisitions	19		151,908
Completed development properties placed in-service	1		377,152
Dispositions	(2	)	(355,654	)
Remeasurement	—		69,809
Total as of December 31, 2019 (1)	112		13,475,795

________________________

(1) Includes four properties owned by consolidated property partnerships (see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report for additional information).

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Occupancy Information

The following table sets forth certain information regarding our stabilized portfolio:

Stabilized Portfolio Occupancy

Region	Number of Buildings	Rentable Square Feet	Occupancy at (1)
			12/31/2019		12/31/2018		12/31/2017
Greater Los Angeles	51	4,025,982	95.2	%	95.1	%	93.3	%
Orange County	—	—	N/A		89.6	%	86.6	%
San Diego County	21	2,048,483	89.7	%	89.3	%	97.4	%
San Francisco Bay Area	32	5,599,540	95.0	%	96.4	%	96.1	%
Greater Seattle	8	1,801,790	97.7	%	93.6	%	95.4	%
Total Stabilized Office Portfolio	112	13,475,795	94.6	%	94.4	%	95.2	%

	Average Occupancy
	Year Ended December 31,
	2019		2018
Stabilized Office Portfolio (1)	93.3	%	94.1	%
Same Store Portfolio (2)	93.7	%	94.3	%
Residential Portfolio (3)	82.4	%	79.7	%

__________________________________

(1) Occupancy percentages reported are based on our stabilized office portfolio as of the end of the period presented and exclude occupancy percentages of properties held for sale.

(2) Occupancy percentages reported are based on office properties owned and stabilized as of January 1, 2018 and still owned and stabilized as of December 31, 2019. See discussion under “Results of Operations” for additional information.

(3) Our residential portfolio consists of our 200-unit residential tower located in Hollywood, California and excludes 237 recently completed residential units that are not yet stabilized.

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Results of Operations

Comparison of the Year Ended December 31, 2019 to the Year Ended December 31, 2018

Net Operating Income

Management internally evaluates the operating performance and financial results of our stabilized portfolio based on Net Operating Income. We define “Net Operating Income” subsequent to the adoption of Topic 842 as consolidated operating revenues (rental income and other property income) less consolidated operating expenses (property expenses, real estate taxes and ground leases). Prior to the adoption of Topic 842 we defined Net Operating Income as consolidated operating revenues (rental income, tenant reimbursements and other property income) less consolidated operating expenses (property expenses, real estate taxes, provision for bad debts and ground leases).

Net Operating Income is considered by management to be an important and appropriate supplemental performance measure to net income because we believe it helps both investors and management to understand the core operations of our properties excluding corporate and financing-related costs and non-cash depreciation and amortization. Net Operating Income is an unlevered operating performance metric of our properties and allows for a useful comparison of the operating performance of individual assets or groups of assets. This measure thereby provides an operating perspective not immediately apparent from GAAP income from operations or net income. In addition, Net Operating Income is considered by many in the real estate industry to be a useful starting point for determining the value of a real estate asset or group of assets. Other real estate companies may use different methodologies for calculating Net Operating Income, and accordingly, our presentation of Net Operating Income may not be comparable to other real estate companies. Because of the exclusion of the items shown in the reconciliation below, Net Operating Income should only be used as a supplemental measure of our financial performance and not as an alternative to GAAP income from operations or net income.

Management further evaluates Net Operating Income by evaluating the performance from the following property groups:

• Same Store Properties – includes the consolidated results of all of the office properties that were owned and included in our stabilized portfolio for two comparable reporting periods, i.e., owned and included in our stabilized portfolio as of January 1, 2018 and still owned and included in the stabilized portfolio as of December 31, 2019, including our residential tower in Hollywood, California;

• Development Properties – includes the results generated by our stabilized development projects, certain of our in-process development projects and expenses for certain of our future development projects, including one office and one retail project in the tenant improvement phase that commenced revenue recognition in the second quarter of 2019, one office development project that was added to the stabilized portfolio in the second quarter of 2019 and the first phase of our residential development project that was completed in the third quarter of 2019.

• Acquisition Properties – includes the results, from the dates of acquisition through the periods presented, for the 19-building creative office campus we acquired during 2019 and the four office buildings we acquired in 2018; and

• Disposition Properties – includes the results of the 11 properties disposed of in the fourth quarter of 2018, the one property disposed of in the second quarter of 2019 and the one property disposed of in the fourth quarter of 2019.

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The following table sets forth certain information regarding the property groups within our stabilized office portfolio as of December 31, 2019.

Group	# of Buildings	Rentable Square Feet
Same Store Properties	88	12,673,967
Development Properties - Stabilized (1)	1	394,340
Acquisition Properties	23	407,488
Total Stabilized Portfolio	112	13,475,795

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(1) Excludes development projects in the tenant improvement phase, our in-process development projects and future development projects.

The following table summarizes our Net Operating Income, as defined, for our total portfolio for the years ended December 31, 2019 and 2018.

	Year Ended December 31,						Dollar Change				Percentage Change
	2019			2018
	($ in thousands)
Reconciliation of Net Income Available to Common Stockholders to Net Operating Income, as defined:
Net Income Available to Common Stockholders	$	195,443		$	258,415		$	(62,972	)		(24.4	)%
Net income attributable to noncontrolling common units of the Operating Partnership	3,766			5,193			(1,427		)		(27.5	)
Net income attributable to noncontrolling interests in consolidated property partnerships	16,020			14,318			1,702				11.9
Net income	$	215,229		$	277,926		$	(62,697	)		(22.6	)%
Unallocated expense (income):
General and administrative expenses	88,139			90,471			(2,332		)		(2.6	)
Leasing costs	7,615			—			7,615			—	100
Depreciation and amortization	273,130			254,281			18,849				7.4
Interest income and other net investment (gain) loss	(4,641		)	559			(5,200		)		(930.2	)
Interest expense	48,537			49,721			(1,184		)		(2.4	)
Loss on early extinguishment of debt	—			12,623			(12,623		)		(100.0	)
Net gain on sales of land	—			(11,825		)	11,825				(100.0	)
Gains on sales of depreciable operating properties	(36,802		)	(142,926		)	106,124				(74.3	)
Net Operating Income, as defined	$	591,207		$	530,830		$	60,377			11.4	%

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The following tables summarize our Net Operating Income, as defined, for our total portfolio for the years ended December 31, 2019 and 2018.

	Year Ended December 31,
	2019										2018
	Same Store		Develop-ment		Acquisitions		Disposi-tions		Total		Same Store		Develop-ment		Acquisitions		Disposi-tions		Total
	(in thousands)										(in thousands)
Operating revenues:
Rental income	$	727,572	$	62,547	$	28,338	$	8,015	$	826,472	$	610,363	$	5,564	$	6,458	$	34,246	$	656,631
Tenant reimbursements	—		—		—		—		—		73,083		849		1,378		5,672		80,982
Other property income	9,051		1,316		37		578		10,982		9,241		4		210		230		9,685
Total	736,623		63,863		28,375		8,593		837,454		692,687		6,417		8,046		40,148		747,298
Property and related expenses:
Property expenses	144,417		10,236		2,909		2,475		160,037		123,235		1,093		598		8,861		133,787
Real estate taxes	64,441		9,279		3,391		986		78,097		63,933		1,696		1,072		4,119		70,820
Provision for bad debts	—		—		—		—		—		5,661		16		—		8		5,685
Ground leases	7,953		—		160		—		8,113		6,176		—		—		—		6,176
Total	216,811		19,515		6,460		3,461		246,247		199,005		2,805		1,670		12,988		216,468
Net Operating Income, as defined	$	519,812	$	44,348	$	21,915	$	5,132	$	591,207	$	493,682	$	3,612	$	6,376	$	27,160	$	530,830

	Year Ended December 31, 2019 as compared to the Year Ended December 31, 2018
	Same Store					Development					Acquisitions					Dispositions					Total
	Dollar Change			Percent Change		Dollar Change			Percent Change		Dollar Change			Percent Change		Dollar Change			Percent Change		Dollar Change			Percent Change
	($ in thousands)
Operating revenues:
Rental income	$	117,209		19.2	%	$	56,983		NM*		$	21,880		338.8	%	$	(26,231	)	(76.6	)%	$	169,841		25.9	%
Tenant reimbursements	(73,083		)	(100.0	)	(849		)	(100.0	)	(1,378		)	(100.0	)	(5,672		)	(100.0	)	(80,982		)	(100.0	)
Other property income	(190		)	(2.1	)	1,312			NM*		(173		)	(82.4	)	348			151.3		1,297			13.4
Total	43,936			6.3		57,446			895.2		20,329			252.7		(31,555		)	(78.6	)	90,156			12.1
Property and related expenses:
Property expenses	21,182			17.2		9,143			836.5		2,311			386.5		(6,386		)	(72.1	)	26,250			19.6
Real estate taxes	508			0.8		7,583			447.1		2,319			216.3		(3,133		)	(76.1	)	7,277			10.3
Provision for bad debts	(5,661		)	(100.0	)	(16		)	(100.0	)	—			—		(8		)	(100.0	)	(5,685		)	(100.0	)
Ground leases	1,777			28.8		—			—		160			100.0		—			—		1,937			31.4
Total	17,806			8.9		16,710			595.7		4,790			286.8		(9,527		)	(73.4	)	29,779			13.8
Net Operating Income, as defined	$	26,130		5.3	%	$	40,736		NM*		$	15,539		243.7	%	$	(22,028	)	(81.1	)%	$	60,377		11.4	%

________________________

* Percentage not meaningful.

The Company adopted Topic 842 on January 1, 2019 which resulted in rental revenues, tenant reimbursements, provision for/recoveries of bad debts, and lease termination fees being presented as one single component in rental income. The presentation changes required by Topic 842 were adopted prospectively with no restatement of previously reported periods required.

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Net Operating Income increased $60.4 million, or 11.4%, for the year ended December 31, 2019 as compared to the year ended December 31, 2018 primarily resulting from:

• An increase of $26.1 million attributable to the Same Store Properties primarily resulting from:

• An increase in total operating revenues of $43.9 million or 6.3% primarily due to the following:

◦ $20.0 million increase primarily due to new leases and renewals at higher average rental rates in the San Francisco Bay Area, Greater Seattle and Los Angeles regions;

◦ $12.0 million increase due to the adoption of Topic 842 on January 1, 2019, resulting in the gross-up of tenant direct billbacks, which were previously presented net in operating expenses. These billbacks are also included in property expenses and have no net impact on operating income;

◦ $5.2 million increase due to tenant recoveries of the new Proposition C gross receipts tax for San Francisco effective January 1, 2019; and

◦ $3.1 million increase due to higher recoveries of recurring expenses related to property taxes, repairs and maintenance, security, utilities, parking and various other recurring expenses at certain properties;

◦ $3.1 million net increase primarily due to a $4.2 million increase in revenue related to the improved credit quality of a tenant for which the Company recorded a bad debt reserve in 2018, partially offset by a $1.1 million decrease in revenue for other tenants with diminished credit quality during the year ended December 31, 2019. The provision for bad debts is included in rental income beginning January 1, 2019 in connection with the adoption of Topic 842; and

◦ $2.5 million increase in parking revenue primarily due to higher tenant parking at certain properties; partially offset by

◦ $2.1 million decrease in early lease termination fees primarily due to early terminations for two tenants in 2018;

• An increase in property and related expenses of $17.8 million or 8.9% primarily resulting from:

• An increase of $21.2 million in property expenses primarily due to:

◦ $12.0 million increase due to the adoption of Topic 842 on January 1, 2019, resulting in the gross-up of tenant direct billbacks, which were previously presented net in property expenses. These billbacks are also included in operating revenues and have no net impact on net operating income;

◦ $5.2 million increase due to the new Proposition C gross receipts tax in San Francisco passed through to tenants which became effective on January 1, 2019; and

◦ $3.7 million increase primarily due to higher reimbursable expenses including utilities, security, repairs and maintenance and various other recurring expenses;

• An increase of $0.5 million in real estate taxes primarily due to:

◦ $1.1 million increase due to higher supplemental taxes assessed in 2019 for the 2016 to 2019 tax years at two properties in the Greater Los Angeles area;

◦ $1.0 million increase from regular annual property tax increases in 2019; offset by

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◦ $1.9 million decrease due to the adoption of Topic 842 on January 1, 2019, which resulted in property taxes related to properties where the Company is the lessee under a ground lease to be presented in ground lease expense;

• An increase in ground leases of $1.8 million primarily due to the adoption of Topic 842 on January 1, 2019, which resulted in property taxes related to properties where the Company is the lessee under a ground lease to be presented in ground lease expense; partially offset by

• A decrease of $5.7 million due to 2018 reserves primarily related to one tenant. The provision for bad debts was included in operating expenses prior to the adoption of Topic 842 on January 1, 2019;

• An increase of $40.7 million attributable to the Development Properties; and

• An increase of $15.5 million attributable to the Acquisition Properties; partially offset by

• A decrease of $22.0 million attributable to the Disposition Properties.

Other Expenses and Income

General and Administrative Expenses

General and administrative expenses decreased by approximately $2.3 million, or 2.6%, for the year ended December 31, 2019 compared to the year ended December 31, 2018 primarily due to the following:

• A decrease of $10.6 million primarily due to lower executive retirement benefit expense; offset by

• An increase of $5.7 million related to the mark-to-market adjustment for the Company’s deferred compensation plan which is offset by gains on the underlying marketable securities included in interest income and other net investment gains in the consolidated statements of operations; and

• A net increase of $2.6 million due to higher compensation and other expenses related to the growth of the Company offset by lower legal fees in 2019 compared to 2018.

Leasing Costs

Effective January 1, 2019, the Company adopted Topic 842 and expensed $7.6 million of indirect leasing costs during the year ended December 31, 2019. Amounts in prior periods were capitalized under previous accounting guidance.

Depreciation and Amortization

Depreciation and amortization increased by approximately $18.8 million, or 7.4%, for the year ended December 31, 2019 compared to the year ended December 31, 2018, primarily due to the following:

• An increase of $4.9 million attributable to the Same Store Properties;

• An increase of $12.8 million attributable to the Acquisition Properties;

• An increase of $13.3 million attributable to the Development Properties; partially offset by

• A decrease of $12.2 million attributable to the Disposition Properties.

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Interest Expense

The following table sets forth our gross interest expense, including debt discounts/premiums and deferred financing cost amortization and capitalized interest, including capitalized debt discounts/premiums and deferred financing cost amortization for the years ended December 31, 2019 and 2018.

	Year Ended December 31,						Dollar Change			Percentage Change
	2019			2018
	($ in thousands)
Gross interest expense	$	129,778		$	117,789		$	11,989		10.2	%
Capitalized interest and deferred financing costs	(81,241		)	(68,068		)	(13,173		)	19.4
Interest expense	$	48,537		$	49,721		$	(1,184	)	(2.4	)%

Gross interest expense, before the effect of capitalized interest and deferred financing costs, increased $12.0 million, or 10.2%, for the year ended December 31, 2019 as compared to the year ended December 31, 2018, primarily due to an increase in the average outstanding debt balance for the year ended December 31, 2019.

Capitalized interest and deferred financing costs increased $13.2 million, or 19.4%, for the year ended December 31, 2019 compared to the year ended December 31, 2018, primarily attributable to an increase in the average development asset balances qualifying for interest capitalization during 2019 as compared to 2018. During the years ended December 31, 2019 and 2018, we capitalized interest on in-process development projects and future development pipeline projects with an average aggregate cost basis of approximately $2.0 billion and $1.6 billion, respectively.

Loss on Early Extinguishment of Debt

In November 2018, we early redeemed the $250.0 million aggregate principal amount of our outstanding 6.625% unsecured senior notes that were scheduled to mature on June 1, 2020. In connection with our early redemption, we incurred a loss on early extinguishment of debt of $12.6 million, which was comprised of a premium paid to the note holders at the redemption date of $11.8 million and a write-off of the unamortized discount and deferred financing costs of $0.8 million.

Net income attributable to noncontrolling interests in consolidated property partnerships

Net income attributable to noncontrolling interests in consolidated property partnerships increased $1.7 million for the year ended December 31, 2019 compared to the year ended December 31, 2018 primarily due to a new lease at a higher rate at one property held in a property partnership in 2019. The amounts reported for the years ended December 31, 2019 and 2018 are comprised of the noncontrolling interest’s share of net income for 100 First Member, LLC (“100 First LLC”) and 303 Second Street Member, LLC (“303 Second LLC”) and the noncontrolling interest’s share of net income for Redwood LLC. See Note 11 “Noncontrolling Interests on the Company's Consolidated Financial Statements” to our consolidated financial statements included in this report for additional information.

Comparison of the Year Ended December 31, 2018 to the Year Ended December 31, 2017

Refer to “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations –Results of Operations” in our Form 10-K for the year ended December 31, 2018 for a discussion of the year ended December 31, 2018 compared to the year ended December 31, 2017.

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Liquidity and Capital Resources of the Company

In this “Liquidity and Capital Resources of the Company” section, the term the “Company” refers only to Kilroy Realty Corporation on an unconsolidated basis and excludes the Operating Partnership and all other subsidiaries.

The Company’s business is operated primarily through the Operating Partnership. Distributions from the Operating Partnership are the Company’s primary source of capital. The Company believes the Operating Partnership’s sources of working capital, specifically its cash flow from operations and borrowings available under its unsecured revolving credit facility and funds from its capital recycling program, including strategic ventures, are adequate for it to make its distribution payments to the Company and, in turn, for the Company to make its dividend payments to its common stockholders for the next twelve months. Cash flows from operating activities generated by the Operating Partnership for the year ended December 31, 2019 were sufficient to cover the Company’s payment of cash dividends to its stockholders. However, there can be no assurance that the Operating Partnership’s sources of capital will continue to be available at all or in amounts sufficient to meet its needs, including its ability to make distributions to the Company. The unavailability of capital could adversely affect the Operating Partnership’s ability to make distributions to the Company, which would in turn, adversely affect the Company’s ability to pay cash dividends to its stockholders.

The Company is a well-known seasoned issuer and the Company and the Operating Partnership have an effective shelf registration statement that provides for the public offering and sale from time to time by the Company of its preferred stock, common stock, depositary shares, warrants and guarantees of debt securities and by the Operating Partnership of its debt securities, in each case in unlimited amounts. The Company evaluates the capital markets on an ongoing basis for opportunities to raise capital, and, as circumstances warrant, the Company and the Operating Partnership may issue securities of all of these types in one or more offerings at any time and from time to time on an opportunistic basis, depending upon, among other things, market conditions, available pricing and capital needs. When the Company receives proceeds from the sales of its preferred or common stock, it generally contributes the net proceeds from those sales to the Operating Partnership in exchange for corresponding preferred or common partnership units of the Operating Partnership. The Operating Partnership may use these proceeds and proceeds from the sale of its debt securities to repay debt, including borrowings under its unsecured revolving credit facility, to develop new or existing properties, to make acquisitions of properties or portfolios of properties, or for general corporate purposes.

As the sole general partner with control of the Operating Partnership, the Company consolidates the Operating Partnership for financial reporting purposes, and the Company does not have significant assets other than its investment in the Operating Partnership. Therefore, the assets and liabilities and the revenues and expenses of the Company and the Operating Partnership are substantially the same on their respective financial statements. The section entitled “Liquidity and Capital Resources of the Operating Partnership” should be read in conjunction with this section to understand the liquidity and capital resources of the Company on a consolidated basis and how the Company is operated as a whole.

Distribution Requirements

The Company is required to distribute 90% of its taxable income (subject to certain adjustments and excluding net capital gains) on an annual basis to maintain qualification as a REIT for federal income tax purposes and is required to pay income tax at regular corporate rates to the extent it distributes less than 100% of its taxable income (including capital gains). As a result of these distribution requirements, the Operating Partnership cannot rely on retained earnings to fund its on-going operations to the same extent as other companies whose parent companies are not REITs. In addition, the Company may be required to use borrowings under the Operating Partnership’s revolving credit facility, if necessary, to meet REIT distribution requirements and maintain its REIT status. The Company may also need to continue to raise capital in the equity markets to fund the Operating Partnership’s working capital needs, as well as potential developments of new or existing properties or acquisitions.

The Company intends to continue to make, but has not committed to make, regular quarterly cash distributions to common stockholders, and through the Operating Partnership, common unitholders from the Operating Partnership’s cash flow from operating activities. All such distributions are at the discretion of the Board of Directors. In 2019, the Company’s distributions exceeded 100% of its taxable income, resulting in a return of capital to its stockholders. As the Company intends to maintain distributions at a level sufficient to meet the REIT distribution requirements and

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minimize its obligation to pay income and excise taxes, it will continue to evaluate whether the current levels of distribution are sufficient to do so for 2020. In addition, in the event the Company is unable to identify and complete the acquisition of suitable replacement properties to effect Section 1031 Exchanges or is unable to successfully complete Section 1031 Exchanges to defer some or all of the taxable gains related to property dispositions, the Company may elect to distribute a special dividend to its common stockholders and common unitholders in order to minimize or eliminate income taxes on such gains. The Company considers market factors and its performance in addition to REIT requirements in determining its distribution levels. Amounts accumulated for distribution to stockholders are invested primarily in interest-bearing accounts and short-term interest-bearing securities, which is consistent with the Company’s intention to maintain its qualification as a REIT. Such investments may include, for example, obligations of the Government National Mortgage Association, other governmental agency securities, certificates of deposit, and interest-bearing bank deposits.

On December 10, 2019, the Board of Directors declared a regular quarterly cash dividend of $0.485 per share of common stock. The regular quarterly cash dividend is payable to stockholders of record on December 31, 2019 and a corresponding cash distribution of $0.485 per Operating Partnership units is payable to holders of the Operating Partnership’s common limited partnership interests of record on December 31, 2019, including those owned by the Company. The total cash quarterly dividends and distributions paid on January 15, 2020 were $52.4 million.

Debt Covenants

The covenants contained within certain of our unsecured debt obligations generally prohibit the Company from paying dividends during an event of default in excess of an amount which results in distributions to us in an amount sufficient to permit us to pay dividends to our stockholders that we reasonably believe are necessary to (a) maintain our qualification as a REIT for federal and state income tax purposes and (b) avoid the payment of federal or state income or excise tax.

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Capitalization

As of December 31, 2019, our total debt as a percentage of total market capitalization was 28.3%, which was calculated based on the closing price per share of the Company’s common stock of $83.90 on December 31, 2019 as shown in the following table:

	Shares/Units at  December 31, 2019	Aggregate Principal Amount or $ Value Equivalent		% of Total Market Capitalization
	($ in thousands)
Debt: (1)
Unsecured Line of Credit		$	245,000	1.9	%
Unsecured Term Loan Facility		150,000		1.2
Unsecured Senior Notes due 2023		300,000		2.4
Unsecured Senior Notes due 2024		425,000		3.4
Unsecured Senior Notes due 2025		400,000		3.1
Unsecured Senior Notes Series A & B due 2026		250,000		2.0
Unsecured Senior Notes due 2028		400,000		3.1
Unsecured Senior Notes due 2029		400,000		3.1
Unsecured Senior Notes Series A & B due 2027 & 2029		250,000		2.0
Unsecured Senior Notes due 2030		500,000		4.0
Secured debt		259,502		2.1
Total debt		3,579,502		28.3
Equity and Noncontrolling Interests in the Operating Partnership: (2)
Common limited partnership units outstanding (2)	2,023,287	169,754		1.3
Shares of common stock outstanding (3) (4)	106,016,287	8,894,766		70.4
Total Equity and Noncontrolling Interests in the Operating Partnership		9,064,520		71.7
Total Market Capitalization		$	12,644,022	100.0	%

________________________ 

(1) Represents gross aggregate principal amount due at maturity before the effect of the following at December 31, 2019: $20.3 million of unamortized deferred financing costs on the unsecured term loan facility, unsecured senior notes and secured debt, $6.5 million of unamortized discounts for the unsecured senior notes.

(2) Includes common units of the Operating Partnership not owned by the Company; does not include noncontrolling interests in consolidated property partnerships.

(3) Value based on closing price per share of our common stock of $83.90 as of December 31, 2019.

(4) Shares of common stock outstanding exclude 3,147,110 shares of common stock sold under forward equity sale agreements that remain to be settled as of December 31, 2019.

Liquidity and Capital Resources of the Operating Partnership

In this “Liquidity and Capital Resources of the Operating Partnership” section, the terms “we,” “our,” and “us” refer to the Operating Partnership or the Operating Partnership and the Company together, as the context requires.

General

Our primary liquidity sources and uses are as follows:

Liquidity Sources

• Net cash flow from operations;

• Borrowings under the Operating Partnership’s unsecured revolving credit facility and term loan facility;

• Proceeds from our capital recycling program, including the disposition of assets and the formation of strategic ventures;

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• Proceeds from additional secured or unsecured debt financings; and

• Proceeds from public or private issuance of debt, equity or preferred equity securities.

Liquidity Uses

• Development and redevelopment costs;

• Operating property or undeveloped land acquisitions;

• Property operating and corporate expenses;

• Capital expenditures, tenant improvement and leasing costs;

• Debt service and principal payments, including debt maturities;

• Distributions to common security holders;

• Repurchases and redemptions of outstanding common stock of the Company; and

• Outstanding debt repurchases, redemptions and repayments.

General Strategy

Our general strategy is to maintain a conservative balance sheet with a strong credit profile and to maintain a capital structure that allows for financial flexibility and diversification of capital resources. We manage our capital structure to reflect a long-term investment approach and utilize multiple sources of capital to meet our long-term capital requirements. We believe that our current projected liquidity requirements for the next twelve-month period, as set forth above under the caption “—Liquidity Uses,” will be satisfied using a combination of the liquidity sources listed above, although there can be no assurance in this regard. We believe our conservative leverage and staggered debt maturities provide us with financial flexibility and enhance our ability to obtain additional sources of liquidity if necessary, and, therefore, we are well-positioned to refinance or repay maturing debt and to pursue our strategy of seeking attractive acquisition opportunities, which we may finance, as necessary, with future public and private issuances of debt and equity securities.

2019 Capital and Financing Transactions

We continue to be active in the capital markets and our capital recycling program to finance our acquisition and development activity and our continued desire to extend our debt maturities. This was primarily a result of the following activity:

Capital Recycling Program

• During the year ended December 31, 2019, we completed the sale of two office buildings to unaffiliated third parties for gross sales proceeds totaling approximately $133.8 million.

Capital Markets / Debt Transactions

• In addition to obtaining funding from our capital recycling program during 2019, we successfully completed the following financing and capital raising activities to fund our continued growth. We continued to strengthen our balance sheet and lower our overall cost of capital.

• Fully physically settled the forward equity sale agreements entered into in August 2018. Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million;

• Issued $500.0 million aggregate principal amount of 10-year 3.050% unsecured senior notes due February 2030 in an underwritten public offering; and

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• Executed various 12-month forward equity sale agreements throughout 2019, under our at-the-market stock offering program, with financial institutions acting as forward purchasers to sell 3,147,110 shares of common stock at a weighted average sales price of $80.08 per share before underwriting discounts, commissions, and offering expenses. We currently expect to fully physically settle the forward equity sale agreements and receive cash proceeds upon one or more settlement dates, at the Company’s discretion, prior to the final settlement dates in the first quarter of 2020 through the first quarter of 2021.

Liquidity Sources

Unsecured Revolving Credit Facility and Term Loan Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	245,000		$	45,000
Remaining borrowing capacity	505,000			705,000
Total borrowing capacity (1)	$	750,000		$	750,000
Interest rate (2)	2.76		%	3.48		%
Facility fee-annual rate (3)	0.200%
Maturity date	July 2022

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $600.0 million under an accordion feature under the terms of the unsecured revolving credit facility and unsecured term loan facility.

(2) Our unsecured revolving credit facility interest rate was calculated based on the contractual rate of LIBOR plus 1.000% as of December 31, 2019 and 2018, respectively.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of December 31, 2019 and 2018, $3.4 million and $4.7 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility.

We intend to borrow under the unsecured revolving credit facility as necessary for general corporate purposes, to finance development and redevelopment expenditures, to fund potential acquisitions and to potentially repay long-term debt.

The following table summarizes the balance and terms of our unsecured term loan facility as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Remaining borrowing capacity	—			—
Total borrowing capacity (1)	$	150,000		$	150,000
Interest rate (2)	2.85		%	3.49		%
Undrawn facility fee-annual rate	0.200%
Maturity date	July 2022

________________________

(1) As of December 31, 2019 and 2018, $0.7 million and $0.9 million of unamortized deferred financing costs, respectively, remained to be amortized through the maturity date of our unsecured term loan facility.

(2) Our unsecured term loan facility interest rate was calculated based on the contractual rate of LIBOR plus 1.100% as of December 31, 2019 and 2018.

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Capital Recycling Program

In connection with our capital recycling strategy, through December 31, 2019, we completed the sale of two properties to unaffiliated third parties for gross sales proceeds totaling approximately $133.8 million. During 2018, we completed the sale of 11 office properties to unaffiliated third parties for total gross sales proceeds of $373.0 million. See “—Factors that May Influence Future Operations” and Note 4 “Dispositions” to our consolidated financial statements included in this report for additional information.

We currently anticipate that in 2020 we could raise additional capital through our dispositions program ranging from approximately $150 million to $300 million. However, any potential future disposition transactions will depend on market conditions and other factors including but not limited to our capital needs and our ability to defer some or all of the taxable gains on the sales. In addition, we cannot assure you that we will dispose of any additional properties or that we will be able to identify and complete the acquisition of suitable replacement properties to effect Section 1031 Exchanges to defer some or all of the taxable capital gains related to our capital recycling program.

Settlement of 2018 Common Stock Forward Equity Sale Agreements

In July 2019, the Company physically settled the forward equity sale agreements entered into in August 2018 with certain financial institutions acting as forward purchasers in connection with an offering of 5,000,000 shares of common stock at an initial gross offering price of $360.5 million, or $72.10 per share, before underwriting discounts, commissions and offering expenses. Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million and contributed the net proceeds to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

At-The-Market Stock Offering Program

Under our 2018 At-The-Market-Program (the “2018 At-The-Market Program”), which commenced June 2018, we may offer and sell shares of our common stock with an aggregate gross sales price of up to $500.0 million from time to time in “at-the-market” offerings. In connection with the at-the-market program, the Company may also, at its discretion, enter into forward equity sale agreements (see “Note 13. Stockholders’ Equity of the Company” to our consolidated financial statements included in this report for additional information).

During the year ended December 31, 2019, we executed various 12-month forward equity sale agreements under the 2018 At-The-Market Program with financial institutions acting as forward purchasers to sell 3,147,110 shares of common stock at a weighted average sales price of $80.08 per share before underwriting discounts, commissions and offering expenses. The Company did not directly sell any shares of our common stock under the 2018 At-The-Market Program during the year and did not receive any proceeds from the sale of its shares of common stock by the forward purchasers. The Company currently expects to fully physically settle the forward equity sale agreements and receive cash proceeds upon one or more settlement dates, at the Company’s discretion, prior to the final settlement dates in the first quarter of 2020 through the first quarter of 2021, at which time we expect to receive aggregate net cash proceeds at settlement equal to the number of shares specified in such forward equity sale agreement multiplied by the relevant forward price per share. The weighted average forward sale price that we expect to receive upon physical settlement of the agreements will be subject to adjustment for (i) a floating interest rate factor equal to a specified daily rate less a spread, (ii) the forward purchasers’ stock borrowing costs and (iii) scheduled dividends during the term of the agreements. We have not settled any portion of these forward equity sale agreements as of the date of this filing. Upon physical settlement, the Company will contribute the net proceeds from the issuance of shares of our common stock to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

Since commencement of the 2018 Program, we have directly sold 447,466 shares of common stock through December 31, 2019 and 3,147,110 shares have been sold by forward purchasers under forward equity sale agreements, which have not been settled as of the date of this filing. As of December 31, 2019, approximately $214.2 million remains available to be sold under this program.

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The following table sets forth information regarding direct sales of our common stock under the 2018 At-The-Market Program and our 2014 at-the-market program for the year ended December 31, 2018:

	Year Ended December 31,
	2018
	(in millions, except share and per share data)
Shares of common stock sold during the year	1,817,195
Weighted average price per share of common stock	$	73.64
Aggregate gross proceeds	$	133.8
Aggregate net proceeds after selling commissions	$	132.1

The proceeds from sales were used to fund development expenditures, acquisitions, and general corporate purposes, including repayment of borrowings under the unsecured revolving credit facility. Actual future sales will depend upon a variety of factors, including, but not limited to market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

Shelf Registration Statement

As discussed above under “—Liquidity and Capital Resources of the Company,” the Company is a well-known seasoned issuer and the Company and the Operating Partnership have an effective shelf registration statement that provides for the public offering and sale from time to time by the Company of its preferred stock, common stock, depository shares and guarantees of debt securities and by the Operating Partnership of its debt securities, in each case in unlimited amounts. The Company evaluates the capital markets on an ongoing basis for opportunities to raise capital, and, as circumstances warrant, the Company and the Operating Partnership may issue securities of all of these types in one or more offerings at any time and from time to time on an opportunistic basis, depending upon, among other things, market conditions, available pricing and capital needs. When the Company receives proceeds from the sales of its preferred or common stock, it generally contributes the net proceeds from those sales to the Operating Partnership in exchange for corresponding preferred or common partnership units of the Operating Partnership. The Operating Partnership may use these proceeds and proceeds from the sale of its debt securities to repay debt, including borrowings under its unsecured revolving credit facility, to develop new or existing properties, to make acquisitions of properties or portfolios of properties, or for general corporate purposes. In September 2019, the Company filed with the Securities Exchange Commission a new shelf registration statement on Form S-3 which became immediately effective upon filing.

Unsecured Senior Notes

In September 2019, the Operating Partnership issued $500.0 million of aggregate principal amount of unsecured senior notes in a registered public offering. The outstanding balance of the unsecured senior notes is included in unsecured debt, net of an initial issuance discount of $0.6 million, on our consolidated balance sheets. The unsecured senior notes, which are scheduled to mature on February 15, 2030, require semi-annual interest payments each February and August based on a stated annual interest rate of 3.050%. The Operating Partnership may redeem the notes at any time prior to February 15, 2030, either in whole or in part, subject to the payment of an early redemption premium prior to a par call option period commencing three months prior to maturity.

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Unsecured and Secured Debt

The aggregate principal amount of the unsecured and secured debt of the Operating Partnership outstanding as of December 31, 2019 was as follows:

	Aggregate Principal  Amount Outstanding (1)
	(in thousands)
Unsecured Line of Credit	$	245,000
Unsecured Term Loan Facility	150,000
Unsecured Senior Notes due 2023	300,000
Unsecured Senior Notes due 2024	425,000
Unsecured Senior Notes due 2025	400,000
Unsecured Senior Notes Series A & B due 2026	250,000
Unsecured Senior Notes due 2028	400,000
Unsecured Senior Notes due 2029	400,000
Unsecured Senior Notes Series A & B due 2027 & 2029	250,000
Unsecured Senior Notes due 2030	500,000
Secured Debt	259,502
Total Unsecured and Secured Debt	3,579,502
Less: Unamortized Net Discounts and Deferred Financing Costs (1)	(26,724		)
Total Debt, Net	$	3,552,778

________________________

(1) Includes $20.3 million of unamortized deferred financing costs on the unsecured term loan facility, unsecured senior notes, and secured debt, $6.5 million of unamortized discounts for the unsecured senior notes. Excludes unamortized deferred financing costs on the unsecured revolving credit facility, which are included in prepaid expenses and other assets, net on our consolidated balance sheets.

Debt Composition

The composition of the Operating Partnership’s aggregate debt balances between secured and unsecured and fixed-rate and variable-rate debt as of December 31, 2019 and 2018 was as follows:

	Percentage of Total Debt (1)				Weighted Average Interest Rate(1)
	December 31, 2019		December 31, 2018		December 31, 2019		December 31, 2018
Secured vs. unsecured:
Unsecured	92.8	%	88.6	%	3.8	%	4.0	%
Secured	7.2	%	11.4	%	3.9	%	4.4	%
Variable-rate vs. fixed-rate:
Variable-rate	11.0	%	6.6	%	2.8	%	3.5	%
Fixed-rate (2)	89.0	%	93.4	%	3.9	%	4.1	%
Stated rate (2)					3.8	%	4.1	%
GAAP effective rate (3)					3.8	%	4.0	%
GAAP effective rate including debt issuance costs					4.0	%	4.2	%

________________________

(1) As of the end of the period presented.

(2) Excludes the impact of the amortization of any debt discounts/premiums and deferred financing costs.

(3) Includes the impact of the amortization of any debt discounts/premiums, excluding deferred financing costs.

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Liquidity Uses

Contractual Obligations

The following table provides information with respect to our contractual obligations as of December 31, 2019. The table: (i) indicates the maturities and scheduled principal repayments of our secured and unsecured debt outstanding as of December 31, 2019; (ii) indicates the scheduled interest payments of our fixed-rate debt as of December 31, 2019; (iii) provides information about the minimum commitments due in connection with our ground lease obligations and other lease and contractual commitments; and (iv) provides estimated development commitments as of December 31, 2019. Note that the table does not reflect our available debt maturity extension options and reflects gross aggregate principal amounts before the effect of unamortized discounts/premiums.

	Payment Due by Period
	Less than 1 Year (2020)		2-3 Years (2021-2022)		4-5 Years (2023-2024)		More than 5 Years (After 2024)		Total
	(in thousands)
Principal payments: secured debt (1)	$	5,137	$	10,896	$	11,781	$	231,688	$	259,502
Principal payments: unsecured debt (2)	—		395,000		725,000		2,200,000		3,320,000
Interest payments: fixed-rate debt (3)	124,083		247,542		223,718		305,869		901,212
Interest payments: variable-rate debt (4)	4,275		6,793		—		—		11,068
Interest payments: unsecured revolving credit facility (5)	6,762		10,744		—		—		17,506
Ground lease obligations (6)	5,641		11,283		11,324		286,385		314,633
Lease and other contractual commitments (7)	149,606		12,009		—		—		161,615
Development commitments (8)	478,000		403,000		—		—		881,000
Total	$	773,504	$	1,097,267	$	971,823	$	3,023,942	$	5,866,536

___________

(1) Represents gross aggregate principal amount before the effect of deferred financing costs of approximately and $0.9 million as of December 31, 2019.

(2) Represents gross aggregate principal amount before the effect of the unamortized discount and deferred financing costs of approximately $6.5 million and $19.4 million as of December 31, 2019.

(3) As of December 31, 2019, 89.0% of our debt was contractually fixed. The information in the table above reflects our projected interest rate obligations for these fixed-rate payments based on the contractual interest rates on an accrual basis and scheduled maturity dates.

(4) As of December 31, 2019, 4.2% of our debt bore interest at variable rates which was incurred under the unsecured term loan facility. The variable interest rate payments are based on the contractual rate of LIBOR plus 1.100% as of December 31, 2019. The information in the table above reflects our projected interest rate obligations for these variable-rate payments based on the outstanding principal balance as of December 31, 2019, the scheduled interest payment dates and the contractual maturity date.

(5) As of December 31, 2019, 6.8% of our debt bore interest at variable rates which was incurred under the unsecured revolving credit facility. The variable interest rate payments are based on the contractual rate of LIBOR plus 1.000% as of December 31, 2019. The information in the table above reflects our projected interest rate obligations for these variable-rate payments based on the outstanding principal balances as of December 31, 2019, the scheduled interest payment dates and the contractual maturity date.

(6) Reflects minimum lease payments through the contractual lease expiration date before the impact of extension options. See Note 18 “Commitments and Contingencies” to our consolidated financial statements included in this report for further information.

(7) Amounts represent cash commitments under signed leases and contracts for operating properties, excluding tenant-funded tenant improvements, and for other contractual commitments. The timing of these expenditures may fluctuate.

(8) Amounts represent commitments under signed leases for pre-leased development projects and contractual commitments for projects in the tenant improvement phase and under construction as of December 31, 2019. The timing of these expenditures may fluctuate based on the ultimate progress of construction. We may start additional construction in 2020 (see “—Development” for additional information).

Other Liquidity Uses

Development

As of December 31, 2019, we had six development projects under construction.  These projects have a total estimated investment of approximately $2.2 billion, of which we have incurred approximately $1.3 billion and committed an additional $826.0 million as of December 31, 2019. In addition, as of December 31, 2019, we had two development projects in the tenant improvement phase. These projects have a total estimated investment of

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approximately $685.0 million of which we have incurred approximately $640.0 million, net of retention, and committed an additional $38.0 million as of December 31, 2019. We also had one stabilized development project and one completed residential project with a total estimated investment of $420.0 million of which we have incurred approximately $400.0 million and committed an additional $17.0 million as of December 31, 2019. Including the commitment information in the table above we currently believe we may spend between $500.0 million to $600.0 million on development projects throughout 2020.  Ultimate timing of these expenditures may fluctuate given construction progress and leasing status of the projects.  We expect that any material additional development activities will be funded with borrowings under the unsecured revolving credit facility, the public or private issuance of debt or equity securities, the disposition of assets under our capital recycling program, or strategic venture opportunities.

Debt Maturities

We believe our conservative leverage and staggered debt maturities provide us with financial flexibility and enhance our ability to obtain additional sources of liquidity if necessary, and, therefore, we believe we are well-positioned to refinance or repay maturing debt and to pursue our strategy of seeking attractive acquisition opportunities, which we may finance, as necessary, with future public and private issuances of debt and equity securities. However, we can provide no assurance that we will have access to the public or private debt or equity markets in the future on favorable terms or at all. Our next debt maturities occur in July 2022.

Potential Future Acquisitions

During the year ended December 31, 2019, we acquired a 19-building creative office campus and two development sites for a total of $359.0 million in cash. During 2018, we acquired four office buildings and a 39-acre development site for a total of $565.2 million in cash. These transactions were funded through various capital raising activities and liquidity as discussed in “—Liquidity Sources”.

As discussed in the section “—Factors That May Influence Future Results of Operations - Acquisitions,” we continue to evaluate strategic opportunities and remain a disciplined buyer of development and redevelopment opportunities as well as value-add operating properties, dependent on market conditions and business cycles, among other factors.  We continue to focus on growth opportunities in West Coast markets populated by knowledge and creative based tenants in a variety of industries, including technology, media, healthcare, life sciences, entertainment and professional services.  Any material acquisitions will be funded with borrowings under the unsecured revolving credit facility, the public or private issuance of debt or equity securities, the disposition of assets under our capital recycling program, the formation of strategic ventures or through the assumption of existing debt. We cannot provide assurance that we will enter into any agreements to acquire properties, or undeveloped land, or that the potential acquisitions contemplated by any agreements we may enter into in the future will be completed.

Share Repurchases

An aggregate of 4,935,826 shares currently remain eligible for repurchase under a share repurchase program approved by the Company’s board of directors in 2016. Under this program, repurchases may be made in open market transactions at prevailing prices or through privately negotiated transactions. We may elect to repurchase shares of our common stock under this program in the future depending upon various factors, including market conditions, the trading price of our common stock and our other uses of capital. This program does not have a termination date, and repurchases may be discontinued at any time. We intend to fund repurchases, if any, primarily with the proceeds from property dispositions.

Potential Future Leasing Costs and Capital Improvements

The amounts we incur for tenant improvements and leasing costs depend on leasing activity in each period. Tenant improvements and leasing costs generally fluctuate in any given period depending on factors such as the type and condition of the property, the term of the lease, the type of the lease, the involvement of external leasing agents and overall market conditions. Capital expenditures may fluctuate in any given period subject to the nature, extent and timing of improvements required to maintain our properties.

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For properties within our stabilized portfolio, excluding our development properties, we believe we could spend approximately $20.0 million to $25.0 million in capital improvements, tenant improvements and leasing costs in 2020, in addition to the lease and contractual commitments included in our contractual obligations table above. The amount we ultimately spend will depend on leasing activity during 2020.

The following table sets forth our historical actual capital expenditures, and tenant improvements and leasing costs for deals commenced, excluding tenant-funded tenant improvements, for renewed and re-tenanted space within our stabilized portfolio for each of the years ended December 31, 2019, 2018 and 2017 on a per square foot basis.

	Year Ended December 31,
	2019		2018		2017
Office Properties:(1)
Capital Expenditures:
Capital expenditures per square foot	$	1.26	$	2.00	$	1.18
Tenant Improvement and Leasing Costs (2)
Replacement tenant square feet (3)	1,228,973		717,427		825,653
Tenant improvements per square foot commenced	$	47.79	$	41.87	$	55.10
Leasing commissions per square foot commenced	$	18.89	$	14.77	$	16.36
Total per square foot	$	66.68	$	56.64	$	71.46
Renewal tenant square feet	797,537		1,161,596		944,865
Tenant improvements per square foot commenced	$	13.72	$	26.64	$	21.66
Leasing commissions per square foot commenced	$	11.84	$	14.55	$	6.80
Total per square foot	$	25.56	$	41.19	$	28.46
Total per square foot per year	$	6.45	$	7.24	$	8.09
Average remaining lease term (in years)	7.8		6.5		6.0

________________________

(1) Excludes development properties and includes 100% of consolidated property partnerships.

(2) Includes tenants with lease terms of 12 months or longer. Excludes leases for month-to-month and first generation tenants.

(3) Excludes leases for which the space was vacant for longer than one year, or vacant when the property was acquired by the Company.

Capital expenditures per square foot decreased in 2019 as compared to 2018 due to a decrease in general building improvements during 2019. We currently anticipate capital expenditures for 2020 to be more consistent with 2018 levels. Replacement tenant improvements and leasing commissions increased in 2019 as compared to 2018 primarily due to the number of large leases commenced and related higher replacement costs in 2019. Renewal tenant improvements and leasing commissions per square foot decreased in 2019 as compared to 2018 primarily due to a higher number of large leases renewed in the San Francisco Bay Area and Greater Seattle regions in 2018. We currently anticipate tenant improvement and leasing commissions for 2020 to be higher than 2019 levels due to the leases executed in 2019, including early renewals of 2020 lease expirations; however, ultimate costs incurred will depend upon market conditions in each of our submarkets and actual leasing activity.

Distribution Requirements

For a discussion of our dividend and distribution requirements, see “Liquidity and Capital Resources of the Company —Distribution Requirements.”

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Factors That May Influence Future Sources of Capital and Liquidity of the Company and the Operating Partnership

We continue to evaluate sources of financing for our business activities, including borrowings under the unsecured revolving credit facility, issuance of public and private equity securities, unsecured debt and fixed-rate secured mortgage financing, proceeds from the disposition of selective assets through our capital recycling program, and the formation of strategic ventures. However, our ability to obtain new financing or refinance existing borrowings on favorable terms could be impacted by various factors, including the state of the macro economy, the state of the credit and equity markets, significant tenant defaults, a decline in the demand for office properties, a decrease in market rental rates or market values of real estate assets in our submarkets, and the amount of our future borrowings. These events could result in the following:

• Decreases in our cash flows from operations, which could create further dependence on the unsecured revolving credit facility;

• An increase in the proportion of variable-rate debt, which could increase our sensitivity to interest rate fluctuations in the future; and

• A decrease in the value of our properties, which could have an adverse effect on the Operating Partnership’s ability to incur additional debt, refinance existing debt at competitive rates, or comply with its existing debt obligations.

In addition to the factors noted above, the Operating Partnership’s credit ratings are subject to ongoing evaluation by credit rating agencies and may be changed or withdrawn by a rating agency in the future if, in its judgment, circumstances warrant. In the event that the Operating Partnership’s credit ratings are downgraded, we may incur higher borrowing costs and may experience difficulty in obtaining additional financing or refinancing existing indebtedness.

Debt Covenants

The unsecured revolving credit facility, unsecured term loan facility, unsecured term loan, unsecured senior notes and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Key existing financial covenants and their covenant levels include:

Unsecured Credit and Term Loan Facility and Private Placement Notes (as defined in the applicable Credit Agreements):	Covenant	Actual Performance as of December 31, 2019
Total debt to total asset value	less than 60%	31%
Fixed charge coverage ratio	greater than 1.5x	3.3x
Unsecured debt ratio	greater than 1.67x	2.90x
Unencumbered asset pool debt service coverage	greater than 1.75x	3.95x
Unsecured Senior Notes due 2023, 2024, 2025, 2028, 2029 and 2030 (as defined in the applicable Indentures):
Total debt to total asset value	less than 60%	37%
Interest coverage	greater than 1.5x	10.8x
Secured debt to total asset value	less than 40%	3%
Unencumbered asset pool value to unsecured debt	greater than 150%	279%

The Operating Partnership was in compliance with all of its debt covenants as of December 31, 2019. Our current expectation is that the Operating Partnership will continue to meet the requirements of its debt covenants in both the short and long term. However, in the event of an economic slowdown or continued volatility in the credit markets, there is no certainty that the Operating Partnership will be able to continue to satisfy all the covenant requirements.

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Consolidated Historical Cash Flow Summary

The following summary discussion of our consolidated historical cash flow is based on the consolidated statements of cash flows in Item 15. “Exhibits and Financial Statement Schedules” and is not meant to be an all-inclusive discussion of the changes in our cash flow for the periods presented below. Changes in our cash flow include changes in cash and cash equivalents and restricted cash. Our historical cash flow activity for the year ended December 31, 2019 as compared to the year ended December 31, 2018 is as follows:

	Year Ended December 31,
	2019			2018			Dollar Change			Percentage Change
	($ in thousands)
Net cash provided by operating activities	$	386,521		$	410,043		$	(23,522	)	(5.7	)%
Net cash used in investing activities	(1,228,279		)	(808,915		)	(419,364		)	51.8	%
Net cash provided by financing activities	747,068			503,108			243,960			48.5	%
Net (decrease) increase in cash and cash equivalents	$	(94,690	)	$	104,236		$	(198,926	)	190.8	%

Operating Activities

Our cash flows from operating activities depends on numerous factors including the occupancy level of our portfolio, the rental rates achieved on our leases, the collectability of rent and recoveries from our tenants, the level of operating expenses, the impact of property acquisitions, completed development projects and related financing activities, and other general and administrative costs. Our net cash provided by operating activities decreased by $23.5 million, or 5.7%, for the year ended December 31, 2019 compared to the year ended December 31, 2018 primarily due to free rent and beneficial occupancy periods for several tenants during the year ended December 31, 2019 and a decrease in cash from net changes in other assets and liabilities related to the timing of expenditures.

Investing Activities

Our cash flows from investing activities is generally used to fund development and operating property acquisitions, expenditures for development projects, and recurring and nonrecurring capital expenditures for our operating properties, net of proceeds received from dispositions of real estate assets. Our net cash used in investing activities increased by $419.4 million, or 51.8%, for the year ended December 31, 2019 compared to the year ended December 31, 2018, primarily due to an increase of $356.2 million in expenditures for development properties and a decrease of $239.9 million in net proceeds received from dispositions, partially offset by $209.1 million of lower expenditures for acquisitions of development and operating properties.

Financing Activities

Our cash flows from financing activities is principally impacted by our capital raising activities, net of dividends and distributions paid to common and preferred security holders. Our net cash provided by financing activities increased by $244.0 million or 48.5% for the year ended December 31, 2019 compared to the year ended December 31, 2018, primarily due to the settlement of our August 2018 forward equity sale agreements during the year ended December 31, 2019.

Off-Balance Sheet Arrangements

As of December 31, 2019 and as of the date this report was filed, we did not have any off-balance sheet transactions, arrangements, or obligations, including contingent obligations.

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Non-GAAP Supplemental Financial Measure: Funds From Operations

We calculate FFO in accordance with the 2018 Restated White Paper on FFO approved by the Board of Governors of NAREIT. The White Paper defines FFO as net income or loss calculated in accordance with GAAP, excluding extraordinary items, as defined by GAAP, gains and losses from sales of depreciable real estate and impairment write-downs associated with depreciable real estate, plus real estate-related depreciation and amortization (excluding amortization of deferred financing costs and depreciation of non-real estate assets) and after adjustment for unconsolidated partnerships and joint ventures. Our calculation of FFO includes the amortization of deferred revenue related to tenant-funded tenant improvements and excludes the depreciation of the related tenant improvement assets. We also add back net income attributable to noncontrolling common units of the Operating Partnership because we report FFO attributable to common stockholders and common unitholders.

We believe that FFO is a useful supplemental measure of our operating performance. The exclusion from FFO of gains and losses from the sale of operating real estate assets allows investors and analysts to readily identify the operating results of the assets that form the core of our activity and assists in comparing those operating results between periods. Also, because FFO is generally recognized as the industry standard for reporting the operations of REITs, it facilitates comparisons of operating performance to other REITs. However, other REITs may use different methodologies to calculate FFO, and accordingly, our FFO may not be comparable to all other REITs.

Implicit in historical cost accounting for real estate assets in accordance with GAAP is the assumption that the value of real estate assets diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, many industry investors and analysts have considered presentations of operating results for real estate companies using historical cost accounting alone to be insufficient. Because FFO excludes depreciation and amortization of real estate assets, we believe that FFO along with the required GAAP presentations provides a more complete measurement of our performance relative to our competitors and a more appropriate basis on which to make decisions involving operating, financing and investing activities than the required GAAP presentations alone would provide.

However, FFO should not be viewed as an alternative measure of our operating performance because it does not reflect either depreciation and amortization costs or the level of capital expenditures and leasing costs necessary to maintain the operating performance of our properties, which are significant economic costs and could materially impact our results from operations.

The following table presents our FFO for the years ended 2019, 2018, 2017, 2016 and 2015:

	Year ended December 31,
	2019			2018			2017			2016			2015
	(in thousands)
Net income available to common stockholders	$	195,443		$	258,415		$	151,249		$	280,538		$	220,831
Adjustments:
Net income attributable to noncontrolling common units of the Operating Partnership	3,766			5,193			3,223			6,635			4,339
Net income attributable to noncontrolling interests in consolidated property partnerships	16,020			14,318			12,780			3,375			184
Depreciation and amortization of real estate assets	268,045			249,882			241,862			213,156			201,480
Gains on sales of depreciable real estate	(36,802		)	(142,926		)	(39,507		)	(164,302		)	(109,950		)
Funds From Operations attributable to noncontrolling interests in consolidated property partnerships	(27,994		)	(24,391		)	(22,820		)	(5,660		)	(272		)
Funds From Operations (1) (2)	$	418,478		$	360,491		$	346,787		$	333,742		$	316,612

_______________________

(1) Reported amounts are attributable to common stockholders, common unitholders and restricted stock unitholders.

(2) FFO available to common stockholders and unitholders includes amortization of deferred revenue related to tenant-funded tenant improvements of $19.2 million, $18.4 million, $16.8 million, $13.2 million and $13.3 million for the years ended December 31, 2019, 2018, 2017, 2016 and 2015, respectively.

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The following table presents our weighted average shares of common stock and common units outstanding for the years ended 2019, 2018, 2017, 2016 and 2015:

	Year Ended December 31,
	2019	2018	2017	2016	2015
Weighted average shares of common stock outstanding	103,200,568	99,972,359	98,113,561	92,342,483	89,854,096
Weighted average common units outstanding	2,023,407	2,052,917	2,133,006	2,429,205	1,791,482
Effect of participating securities – nonvested shares and restricted stock units	1,118,349	1,142,053	1,196,044	1,139,669	1,170,571
Total basic weighted average shares / units outstanding	106,342,324	103,167,329	101,442,611	95,911,357	92,816,149
Effect of dilutive securities – shares issuable under executed forward equity sale agreements, stock options and contingently issuable shares	648,600	510,006	613,770	680,551	541,679
Total diluted weighted average shares / units outstanding	106,990,924	103,677,335	102,056,381	96,591,908	93,357,828

Inflation

The majority of the Company’s leases require tenants to pay for recoveries and escalation charges based upon the tenant’s proportionate share of, and/or increases in, real estate taxes and certain operating costs, which reduce the Company’s exposure to increases in operating costs resulting from inflation.

New Accounting Pronouncements and Auditing Standards

For a discussion of new accounting pronouncements see Note 2 “Basis of Presentation and Significant Accounting Policies” to our consolidated financial statements included in this report.

On June 1, 2017, the Public Company Accounting Oversight Board (PCAOB) issued Auditing Standard 3101, The Auditor’s Report on an Audit of Financial Statements When the Auditor Expresses an Unqualified Opinion (“AS 3101”). As a result of AS 3101, the most significant change to the auditor’s report on the financial statements is a new requirement to describe critical audit matters arising from the audit of the current period’s financial statements in the auditor’s report. The requirements related to critical audit matters in AS 3101 were effective for audits of fiscal years ending on or after June 30, 2019, for large accelerated filers; and for fiscal years ending on or after December 15, 2020, for all other companies to which the requirements apply. Therefore, critical audit matters are included in the Report of Independent Registered Public Accounting Firm for the Company’s consolidated financial statements as of and for the year ended December 31, 2019, and will be included in the Report of Independent Registered Public Accounting Firm for the Operating Partnership’s financial statements as of and for the year ending December 31, 2020.

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ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The primary market risk we face is interest rate risk. We seek to mitigate this risk by following established risk management policies and procedures. These policies include maintaining prudent amounts of debt, including a greater amount of fixed-rate debt as compared to variable-rate debt in our portfolio, and may include the periodic use of derivative instruments. As of December 31, 2019 and 2018, we did not have any interest-rate sensitive derivative assets or liabilities. Information about our changes in interest rate risk exposures from December 31, 2018 to December 31, 2019 is incorporated herein by reference from “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations —Liquidity and Capital Resources of the Operating Partnership.”

Interest Rate Risk

As of December 31, 2019, 11.0% of our total outstanding debt of $3.6 billion (before the effects of debt discounts and deferred financing costs) was subject to variable interest rates. The remaining 89.0% bore interest at fixed rates. All of our interest rate sensitive financial instruments are held for purposes other than trading purposes. In general, interest rate fluctuations applied to our variable-rate debt will impact our future earnings and cash flows. Conversely, interest rate fluctuations applied to our fixed-rate debt will generally not impact our future earnings and cash flows, unless such instruments mature or are otherwise terminated and need to be refinanced. However, interest rate fluctuations will impact the fair value of the fixed-rate debt instruments.

We generally determine the fair value of our secured debt, unsecured debt, and unsecured line of credit by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market rate by obtaining period-end treasury rates for maturities that correspond to the maturities of our fixed-rate debt and then adding an appropriate credit spread based on information obtained from third-party financial institutions. These credit spreads take into account factors, including but not limited to, our credit profile, the tenure of the debt, amortization period, whether the debt is secured or unsecured, and the loan-to-value ratio of the debt to the collateral, amongst other factors. These calculations are significantly affected by the assumptions used, including the discount rate, credit spreads and estimates of future cash flow. We calculate the market rate of our unsecured revolving credit facility and unsecured term loan facility by obtaining the period-end London Interbank Offered Rate (“LIBOR”) and then adding an appropriate credit spread based on our credit ratings, and the amended terms of our unsecured revolving credit facility and unsecured term loan facility agreement. We determine the fair value of each of our publicly traded unsecured senior notes based on their quoted trading price at the end of the reporting period, if such prices are available. See Note 19 “Fair Value Measurements and Disclosures” and Note 2 “Basis of Presentation and Significant Accounting Policies” in the consolidated financial statements included in this report for additional information on the fair value of our financial assets and liabilities as of December 31, 2019 and December 31, 2018.

At December 31, 2019, the total outstanding balance of our variable-rate debt was comprised of borrowings on our unsecured revolving facility of $245.0 million and unsecured term loan facility of $150.0 million, which were indexed to LIBOR plus a spread of 1.00% (weighted average interest rate of 2.76%) and LIBOR plus a spread of 1.10% (weighted average interest rate of 2.85%), respectively. As of December 31, 2018, the total outstanding balance of our variable-rate debt was comprised of borrowings on our unsecured revolving credit facility of $45.0 million and unsecured term loan facility of $150.0 million, which were indexed to LIBOR plus a spread of 1.00% (weighted average interest rate of 3.48%) and LIBOR plus a spread of 1.10% (weighted average interest rate of 3.49%), respectively. Assuming no changes in the outstanding balance of our existing variable-rate debt as of December 31, 2019, a 100 basis point increase in the LIBOR rate would have increased our projected annual interest expense, before the effect of capitalization, by approximately $4.0 million.

The total carrying value of our fixed-rate debt was approximately $3.2 billion and $2.7 billion as of December 31, 2019 and 2018, respectively. The total estimated fair value of our fixed-rate debt was approximately $3.4 billion and $2.7 billion as of December 31, 2019 and 2018, respectively. For sensitivity purposes, a 100 basis point increase in the discount rate equates to a decrease in the total fair value of our fixed-rate debt of approximately $203.3 million, or 6.0%, as of December 31, 2019. Comparatively, a 100 basis point increase in the discount rate equates to a decrease in the total fair value of our fixed-rate debt of approximately $165.3 million, or 6.1%, as of December 31, 2018.

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In July 2017, the Financial Conduct Authority (the authority that regulates LIBOR) announced it intends to stop compelling banks to submit rates for the calculation of LIBOR after 2021. The Alternative Reference Rates Committee (“ARRC”) has proposed that the Secured Overnight Financing Rate (“SOFR”) is the rate that represents best practice as the alternative to LIBOR for use in derivatives and other financial contracts that are currently indexed to LIBOR. ARRC has proposed a paced market transition plan to SOFR from LIBOR and organizations are currently working on industry wide and company specific transition plans as it relates to derivatives and cash markets exposed to LIBOR. As our variable-rate debt is indexed to LIBOR, we are monitoring this activity and evaluating the related risks.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA    

See the index included at Item 15. “Exhibits and Financial Statement Schedules.”

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE    

Not applicable.

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ITEM 9A. CONTROLS AND PROCEDURES    

Kilroy Realty Corporation

The Company maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in the Company’s reports under the Exchange Act is processed, recorded, summarized, and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Company carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures as of December 31, 2019, the end of the period covered by this report. Based on the foregoing, the Company’s Chief Executive Officer and Chief Financial Officer concluded, as of that time, the disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There have been no changes that occurred during the fourth quarter of the most recent year covered by this report in the Company’s internal control over financial reporting identified in connection with the evaluation referenced above that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

Internal control over financial reporting is a process designed by, or under the supervision of, our Chief Executive Officer and Chief Financial Officer and effected by our board of directors, management, and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Internal control over financial reporting includes those policies and procedures that: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of management and directors; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of assets that could have a material effect on the consolidated financial statements.

Management is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control over financial reporting is supported by written policies and procedures and by an appropriate segregation of responsibilities and duties. The Company has used the criteria set forth in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission to assess our internal control over financial reporting. Based upon this assessment, management concluded that internal control over financial reporting operated effectively as of December 31, 2019.

Deloitte & Touche LLP, the Company’s independent registered public accounting firm, has audited the Company’s financial statements and has issued a report on the effectiveness of the Company’s internal control over financial reporting.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and Board of Directors of

Kilroy Realty Corporation

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Kilroy Realty Corporation and subsidiaries (the “Company”) as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2019, of the Company and our report dated February 13, 2020, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

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Kilroy Realty, L.P.

The Operating Partnership maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in the Operating Partnership’s reports under the Exchange Act, is processed, recorded, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer of its general partner, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Operating Partnership carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer of its general partner, of the effectiveness of the design and operation of the disclosure controls and procedures as of December 31, 2019, the end of the period covered by this report. Based on the foregoing, the Chief Executive Officer and Chief Financial Officer of its general partner concluded, as of that time, the disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

There have been no changes that occurred during the fourth quarter of the most recent year covered by this report in the Operating Partnership’s internal control over financial reporting identified in connection with the evaluation referenced above that have materially affected, or are reasonably likely to materially affect, the Operating Partnership’s internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

Internal control over financial reporting is a process designed by, or under the supervision of, the Chief Executive Officer and Chief Financial Officer of the Operating Partnership’s general partner and effected by the board of directors, management, and other personnel of its general partner to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Internal control over financial reporting includes those policies and procedures that: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of management and directors; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of assets that could have a material effect on the consolidated financial statements.

Management is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control over financial reporting is supported by written policies and procedures and by an appropriate segregation of responsibilities and duties. The Operating Partnership has used the criteria set forth in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission to assess our internal control over financial reporting. Based upon this assessment, management concluded that internal control over financial reporting operated effectively as of December 31, 2019.

Deloitte & Touche LLP, the Operating Partnership’s independent registered public accounting firm, has audited the Operating Partnership’s financial statements and has issued a report on the effectiveness of the Operating Partnership’s internal control over financial reporting.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Partners of

Kilroy Realty, L.P.

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Kilroy Realty, L.P. and subsidiaries (the “Operating Partnership”) as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Operating Partnership maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2019, of the Operating Partnership and our report dated February 13, 2020, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Operating Partnership’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Operating Partnership’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

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ITEM 9B. OTHER INFORMATION

Not applicable.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Item 10 is incorporated by reference from our definitive proxy statement for our annual stockholders’ meeting presently scheduled to be held in May 2020.

ITEM 11. EXECUTIVE COMPENSATION

The information required by Item 11 is incorporated by reference from our definitive proxy statement for our annual stockholders’ meeting presently scheduled to be held in May 2020.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by Item 12 is incorporated by reference from our definitive proxy statement for our annual stockholders’ meeting presently scheduled to be held in May 2020.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by Item 13 is incorporated by reference from our definitive proxy statement for our annual stockholders’ meeting presently scheduled to be held in May 2020.

ITEM 14.  PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by Item 14 is incorporated by reference from our definitive proxy statement for our annual stockholders’ meeting presently scheduled to be held in May 2020.

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PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)(1) and (2) Financial Statements and Schedules

The following consolidated financial information is included as a separate section of this annual report on Form 10-K:

Report of Independent Registered Public Accounting Firm – Kilroy Realty Corporation	F - 2
Consolidated Balance Sheets as of December 31, 2019 and 2018 – Kilroy Realty Corporation	F - 4
Consolidated Statements of Operations for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty Corporation	F - 5
Consolidated Statements of Equity for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty Corporation	F - 6
Consolidated Statements of Cash Flows for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty Corporation	F - 7
Report of Independent Registered Public Accounting Firm – Kilroy Realty, L.P.	F - 8
Consolidated Balance Sheets as of December 31, 2019 and 2018 – Kilroy Realty, L.P.	F - 9
Consolidated Statements of Operations for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty, L.P.	F - 10
Consolidated Statements of Capital for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty, L.P.	F - 11
Consolidated Statements of Cash Flows for the Years ended December 31, 2019, 2018 and 2017 – Kilroy Realty, L.P.	F - 12
Notes to Consolidated Financial Statements	F - 13
Schedule II – Valuation and Qualifying Accounts	F - 64
Schedule III – Real Estate and Accumulated Depreciation	F - 65

All other schedules are omitted because the required information is not present in amounts sufficient to require submission of the schedule or because the information required is included in the financial statements and notes thereto.

(3)  Exhibits

Exhibit Number	Description
3.(i)1	Kilroy Realty Corporation Articles of Restatement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2012)
3.(i)2	Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)3	Amendment to the Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)4	Articles Supplementary reclassifying shares of the Series G Preferred Stock of the Company (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 23, 2017)
3.(i)5	Articles Supplementary reclassifying shares of the Series H Preferred Stock of the Company (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 23, 2017)
3.(ii)1	Fifth Amended and Restated Bylaws of Kilroy Realty Corporation (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 1, 2017)

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3.(ii)2	Seventh Amended and Restated Agreement of Limited Partnership of Kilroy Realty, L.P. dated August 15, 2012, as amended (previously filed by Kilroy Realty Corporation on Form 10-Q for the quarter ended June 30, 2014)
4.(vi)1*	Description of Capital Stock of Kilroy Realty Corporation
4.(vi)2*	Description of Common Units Representing Limited Partnership Interests of Kilroy Realty, L.P.
4.1	Kilroy Realty Corporation Form of Certificate for Common Stock (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
4.2	Registration Rights Agreement, dated January 31, 1997 (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
4.3	Form of Certificate for Partnership Units of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
4.4	Registration Rights Agreement, dated July 31, 2012 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2012)
4.5	Officers’ Certificate pursuant to Sections 101, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.800% Notes due 2023,” including the form of 3.800% Notes due 2023 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on January 14, 2013)
4.6	Indenture, dated March 1, 2011, by and among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit to the Registration Statement on Form S-3 as filed with the Securities and Exchange Commission on October 2, 2013)
4.7	Supplemental Indenture, dated July 5, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit to the Registration Statement on Form S-3 as filed with the Securities and Exchange Commission on October 2, 2013)
4.8	Officers’ Certificate pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.25% Senior Notes due 2029,” including the form of 4.25% Senior Notes due 2029 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 6, 2014)
4.9	Officers’ Certificate, dated September 16, 2015, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.375% Senior Notes due 2025,” including the form of 4.375% Senior Notes due 2025 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 16, 2015)
4.10	Officers’ Certificate, dated December 11, 2017, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.450% Senior Notes due 2024,” including the form of 3.450% Senior Notes due 2024 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 11, 2017)
4.11	Officers’ Certificate, dated November 29, 2018, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, as amended and supplemented, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.750% Senior Notes due 2028,” including the form of 4.750% Senior Note due 2028 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on November 29, 2018)

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4.12	Officers’ Certificate, dated September 17, 2019, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, as amended and supplemented, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.050% Senior Notes due 2030,” including the form of 3.050% Senior Note due 2030 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 17, 2019)
4.13	The Company is party to agreements in connection with long-term debt obligations, none of which individually exceeds ten percent of the total assets of the Company on a consolidated basis. Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Company agrees to furnish copies of these agreements to the Commission upon request
10.1	Pledge Agreement by and among Kilroy Realty, L.P., John B. Kilroy, Sr., John B. Kilroy, Jr. and Kilroy Industries (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
10.2†	1997 Stock Option and Incentive Plan of the Registrant and Kilroy Realty, L.P. (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
10.3	License Agreement by and among the Registrant and the other persons named therein (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 4 to Form S-11 (No. 333-15553))
10.4†	Form of Restricted Stock Award Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 8, 2007)
10.5†	Kilroy Realty Corporation Stock Award Deferral Program (previously filed by Kilroy Realty Corporation as an exhibit to Form 8-K as filed with the Securities and Exchange Commission on January 2, 2008)
10.6†	Form of Indemnification Agreement of Kilroy Realty Corporation with certain officers and directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-K for the year ended December 31, 2009)
10.7†	Kilroy Realty Corporation Form of Stock Option Grant Notice and Stock Option Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 24, 2012)
10.8†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2013)
10.9†	Form of Stock Award Deferral Program Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2013)
10.10†	Form of Performance-Vest Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.11†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.12†	Form of Restricted Stock Unit Agreement for Non-Employee Members of the Board of Directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.13†	Form of Performance-Vest Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.14†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.15†	Form of Restricted Stock Unit Agreement for Non-Employee Members of the Board of Directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.16†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of December 31, 2015 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-K for the year ended December 31, 2015)

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10.17†	Confidential Separation Agreement and Release of Claims by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Stephen A. Rosetta effective as of August 26, 2019 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended September 30, 2019)
10.18†	Extension of Employment Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of February 28, 2019 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2019)
10.19†*	Extension of Employment Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of January 31, 2020
10.20†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and Jeffrey C. Hawken, dated January 9, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.21†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Tyler H. Rose effective as of January 28, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.22†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Justin W. Smart effective as of January 28, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.23†	Kilroy Realty Corporation Director Compensation Policy effective as of April 1, 2018 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2018.
10.24†	Employment Agreement, as amended and restated December 27, 2018, by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and John B. Kilroy, Jr. (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)
10.25†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and John B. Kilroy, Jr., dated December 27, 2018 (with retirement as to Time-Based RSUs) (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)
10.26†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and John B. Kilroy, Jr., dated December 27, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)
10.27†	Form of Restricted Stock Unit Agreement for 2006 Incentive Award Plan
10.28	Note Purchase Agreement dated September 14, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 14, 2016)
10.29	Amendment to Note Purchase Agreement dated May 11, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 14, 2018)
10.30	Form of Time Sharing Agreement of Kilroy Realty, L.P. (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended September 30, 2016)
10.31	Promissory Note, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.32	Loan Agreement, dated November 29, 2016, by and between KR WMC, LLC and Massachusetts Mutual Life Insurance Company (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.33	Deed of Trust, Assignment of Leases and Rents, Security Agreement and Fixture Filing, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.34	Assignment of Leases and Rents, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)

103

10.35	Recourse Guaranty Agreement, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.36	Environmental Indemnification Agreement, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.37†	Kilroy Realty Corporation 2007 Deferred Compensation Plan, as amended and restated effective January 1, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2016)
10.38	General Partner Guaranty Agreement, dated February 17, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended March 31, 2017)
10.39†	Kilroy Realty 2006 Incentive Award Plan (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 23, 2017)
10.40	Second Amended and Restated Credit Agreement dated as of July 24, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended June 30, 2017)
10.41	Second Amended and Restated Guaranty dated as of July 24, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended on June 30, 2017)
10.42	Note Purchase Agreement dated May 11, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 14, 2018)
10.43	Sales Agreement, dated June 5, 2018, between and among Kilroy Realty Corporation, Kilroy Realty, L.P. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Jefferies LLC, J.P. Morgan Securities LLC, Raymond James & Associates, Inc., RBC Capital Markets, LLC, Scotia Capital (USA) Inc. and SMBC Nikko Securities America, Inc. as Agents, and the Forward Purchasers (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on June 5, 2018)
21.1*	List of Subsidiaries of Kilroy Realty Corporation
21.2*	List of Subsidiaries of Kilroy Realty, L.P.
23.1*	Consent of Deloitte & Touche LLP for Kilroy Realty Corporation
23.2*	Consent of Deloitte & Touche LLP for Kilroy Realty, L.P.
24.1*	Power of Attorney (included on the signature page of this Form 10-K)
31.1*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty Corporation
31.2*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty Corporation
31.3*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty, L.P.
31.4*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty, L.P.
32.1*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty Corporation
32.2*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty Corporation
32.3*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty, L.P.
32.4*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty, L.P.
101.1	The following Kilroy Realty Corporation and Kilroy Realty, L.P. financial information for the year ended December 31, 2019, formatted in inline XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Changes in Equity, (iv) Consolidated Statements of Capital, (v) Consolidated Statements of Cash Flows and (vi) Notes to the Consolidated Financial Statements(1)

*	Filed herewith
†	Management contract or compensatory plan or arrangement.
(1)	Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933 or Section 18 of the Securities Exchange Act of 1934 and otherwise are not subject to liability under these sections.

104

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Kilroy Realty Corporation has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on February 13, 2020.

KILROY REALTY CORPORATION
By	/s/ Merryl E. Werber
	Merryl E. Werber Senior Vice President, Chief Accounting Officer and Controller

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that we, the undersigned directors and officers of Kilroy Realty Corporation, do hereby severally constitute and appoint John Kilroy, Jeffrey C. Hawken, Tyler H. Rose and Merryl E. Werber, and each of them, as our true and lawful attorneys-in-fact and agents, each with full powers of substitution, to do any and all acts and things in our name and behalf in our capacities as directors and officers and to execute any and all instruments for us and in our names in the capacities indicated below, which said attorneys-in-fact and agents, or any of them, may deem necessary or advisable to enable Kilroy Realty Corporation to comply with the Securities Exchange Act of 1934, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission, in connection with this Annual Report on Form 10-K, including specifically, but without limitation, the power and authority to sign for us or any of us, in our names in the capacities indicated below, any and all amendments hereto; and we do each hereby ratify and confirm all that said attorneys-in-fact and agents or their substitutes, or any one of them, shall do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Name	Title	Date
/s/ John Kilroy	Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer)	February 13, 2020
John Kilroy
/s/ Tyler H. Rose	Executive Vice President and Chief Financial Officer (Principal Financial Officer)	February 13, 2020
Tyler H. Rose
/s/ Merryl E. Werber	Senior Vice President, Chief Accounting Officer and Controller (Principal Accounting Officer)	February 13, 2020
Merryl E. Werber
/s/ Edward F. Brennan, PhD	Director	February 12, 2020
Edward F. Brennan, PhD
/s/ Jolie Hunt	Director	February 12, 2020
Jolie Hunt
/s/ Scott S. Ingraham	Director	February 12, 2020
Scott S. Ingraham
/s/ Gary R. Stevenson	Director	February 12, 2020
Gary R. Stevenson
/s/ Peter B. Stoneberg	Director	February 12, 2020
Peter B. Stoneberg

105

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Kilroy Realty, L.P. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on February 13, 2020.

KILROY REALTY, L.P.
By	/s/ Merryl E. Werber
	Merryl E. Werber Senior Vice President, Chief Accounting Officer and Controller

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that we, the undersigned directors and officers of Kilroy Realty Corporation, as sole general partner and on behalf of Kilroy Realty, L.P., do hereby severally constitute and appoint John Kilroy, Jeffrey C. Hawken, Tyler H. Rose and Merryl E. Werber, and each of them, as our true and lawful attorneys-in-fact and agents, each with full powers of substitution, to do any and all acts and things in our name and behalf in our capacities as directors and officers and to execute any and all instruments for us and in our names in the capacities indicated below, which said attorneys-in-fact and agents, or any of them, may deem necessary or advisable to enable Kilroy Realty Corporation, as sole general partner and on behalf of Kilroy Realty, L.P., to comply with the Securities Exchange Act of 1934, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission, in connection with this Annual Report on Form 10-K, including specifically, but without limitation, the power and authority to sign for us or any of us, in our names in the capacities indicated below, any and all amendments hereto; and we do each hereby ratify and confirm all that said attorneys-in-fact and agents or their substitutes, or any one of them, shall do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Name	Title	Date
/s/ John Kilroy	Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer)	February 13, 2020
John Kilroy
/s/ Tyler H. Rose	Executive Vice President and Chief Financial Officer (Principal Financial Officer)	February 13, 2020
Tyler H. Rose
/s/ Merryl E. Werber	Senior Vice President, Chief Accounting Officer and Controller (Principal Accounting Officer)	February 13, 2020
Merryl E. Werber
/s/ Edward F. Brennan, PhD	Director	February 12, 2020
Edward F. Brennan, PhD
/s/ Jolie Hunt	Director	February 12, 2020
Jolie Hunt
/s/ Scott S. Ingraham	Director	February 12, 2020
Scott S. Ingraham
/s/ Gary R. Stevenson	Director	February 12, 2020
Gary R. Stevenson
/s/ Peter B. Stoneberg	Director	February 12, 2020
Peter B. Stoneberg

106

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

CONSOLIDATED FINANCIAL STATEMENTS AS OF DECEMBER 31, 2019 AND 2018

AND FOR THE THREE YEARS ENDED DECEMBER 31, 2019

TABLE OF CONTENTS

	Page
FINANCIAL STATEMENTS OF KILROY REALTY CORPORATION:
Report of Independent Registered Public Accounting Firm	F - 2
Consolidated Balance Sheets as of December 31, 2019 and 2018	F - 4
Consolidated Statements of Operations for the Years ended December 31, 2019, 2018 and 2017	F - 5
Consolidated Statements of Equity for the Years ended December 31, 2019, 2018 and 2017	F - 6
Consolidated Statements of Cash Flows for the Years ended December 31, 2019, 2018 and 2017	F - 7
FINANCIAL STATEMENTS OF KILROY REALTY, L.P.:
Report of Independent Registered Public Accounting Firm	F - 8
Consolidated Balance Sheets as of December 31, 2019 and 2018	F - 9
Consolidated Statements of Operations for the Years ended December 31, 2019, 2018 and 2017	F - 10
Consolidated Statements of Capital for the Years ended December 31, 2019, 2018 and 2017	F - 11
Consolidated Statements of Cash Flows for the Years ended December 31, 2019, 2018 and 2017	F - 12
Notes to Consolidated Financial Statements for Kilroy Realty Corporation and Kilroy Realty, L.P.	F - 13
Schedule II – Valuation and Qualifying Accounts for Kilroy Realty Corporation and Kilroy Realty, L.P.	F - 64
Schedule III – Real Estate and Accumulated Depreciation for Kilroy Realty Corporation and    Kilroy Realty, L.P.	F - 65

F - 1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and Board of Directors of

Kilroy Realty Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Kilroy Realty Corporation and subsidiaries (the “Company”) as of December 31, 2019 and 2018, the related consolidated statements of operations, equity, and cash flows, for each of the three years in the period ended December 31, 2019, and the related notes and the schedules listed in the Index at Item 15 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 13, 2020 expressed an unqualified opinion on the Company’s internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Rental income, deferred revenue and acquisition-related intangible liabilities - Timing of Development Property Revenue Recognition and Ownership of Tenant Improvements - Refer to Notes 2 and 10 to the financial statements

Critical Audit Matter Description

The Company evaluates tenant improvements on a lease-by-lease basis to determine who is the owner of such assets for accounting purposes. When management concludes that the Company is the owner of the tenant improvements, the Company records the cost to construct the tenant improvements as capital assets, and commences rental revenue recognition when the tenant takes possession of or controls the finished space, which is typically when the improvements being recorded as the Company’s asset are substantially complete. When management concludes that the Company is not the owner and the tenant is the owner of certain tenant improvements for accounting purposes, the Company records their contribution towards those tenant-owned improvements as a lease incentive, which is amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease, and rental revenue recognition begins when

F - 2

the tenant takes possession of or controls the leased space. The determination of whether the Company or tenant is the owner of tenant improvements for accounting purposes is subject to significant judgment, and the commencement of rental revenue recognition depends on the Company’s conclusion as to when the tenant takes possession of or controls the leased space. Control is typically transferred when the Company has completed all of its obligations under the lease agreement in order for the leased space to be used by the tenant as intended. The Company’s determination of whether its obligations have been met and control has been transferred to the tenant can be complex for large development properties.

Given the nature of construction work on large development properties, auditing management’s estimates regarding the commencement of rental revenue recognition, including the determination of the owner of the tenant improvements and when control of the leased space transfers to the tenant, involves especially subjective judgment. Construction for large development properties can include certain tenant improvements that are landlord-owned and others that are tenant-owned improvements, typically dependent upon the judgment of whether the tenant improvements are unique to the tenant or reusable by other tenants at the end of the lease term. Further, large development properties can deliver leased space in phases, resulting in various revenue commencement dates with judgment surrounding when the tenant improvements that are landlord-owned, for a particular phase, are substantially complete.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to determining the ownership of tenant improvements and when control of the leased space transfers to the tenant for development properties, thus the timing of the commencement of rental revenue recognition, included the following, among others:

• We tested the effectiveness of controls over revenue recognition, including those over the ownership of tenant improvements and the determination of when the tenant took possession of or controlled the leased space.

• We evaluated the reasonableness of management’s conclusions regarding the Company’s ownership of tenant improvements by:

– Evaluating the Company’s and the tenant’s respective obligations as governed by the lease agreements for selected leases against criteria for establishing ownership.

– Testing documentation supporting the nature of tenant improvements.

– Performing on-site inspections of selected development properties to evaluate the nature of tenant improvements, particularly the uniqueness of the improvements.

• We evaluated the reasonableness of management’s conclusions regarding the possession of or control of the completed leased space and corresponding commencement of rental revenue recognition for development properties by:

– Testing documentation from construction contractors, architects, and city building inspection sign offs on temporary certificates of occupancy.

– Performing on-site inspections of selected development properties near the planned rental revenue recognition commencement date to observe the status of the site and tenant improvements to evaluate whether control of the leased space had been or was ready to be transferred to the tenant.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

We have served as the Company’s auditor since 1995.

F - 3

KILROY REALTY CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	December 31, 2019			December 31, 2018
ASSETS
REAL ESTATE ASSETS (Notes 2, 3 and 4):
Land and improvements	$	1,466,166		$	1,160,138
Buildings and improvements	5,866,477			5,207,984
Undeveloped land and construction in progress	2,296,130			2,058,510
Total real estate assets held for investment	9,628,773			8,426,632
Accumulated depreciation and amortization	(1,561,361		)	(1,391,368		)
Total real estate assets held for investment, net	8,067,412			7,035,264
CASH AND CASH EQUIVALENTS (Note 23)	60,044			51,604
RESTRICTED CASH (Notes 3, 4 and 23)	16,300			119,430
MARKETABLE SECURITIES (Notes 16 and 19)	27,098			21,779
CURRENT RECEIVABLES, NET (Notes 2, 6 and 20)	26,489			20,176
DEFERRED RENT RECEIVABLES, NET (Notes 2, 6 and 20)	337,937			267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	212,805			197,574
RIGHT OF USE GROUND LEASE ASSETS (Notes 2 and 18)	96,348			—
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	55,661			52,873
TOTAL ASSETS	$	8,900,094		$	7,765,707
LIABILITIES AND EQUITY
LIABILITIES:
Secured debt, net (Notes 8, 9 and 19)	$	258,593		$	335,531
Unsecured debt, net (Notes 8, 9 and 19)	3,049,185			2,552,070
Unsecured line of credit (Notes 8, 9 and 19)	245,000			45,000
Accounts payable, accrued expenses and other liabilities (Note 18)	418,848			374,415
Ground lease liabilities (Notes 2 and 18)	98,400			—
Accrued dividends and distributions (Notes 13 and 28)	53,219			47,559
Deferred revenue and acquisition-related intangible liabilities, net (Notes 3, 5 and 10)	139,488			149,646
Rents received in advance and tenant security deposits	66,503			60,225
Total liabilities	4,329,236			3,564,446
COMMITMENTS AND CONTINGENCIES (Note 18)
EQUITY:
Stockholders’ Equity (Note 13):
Common stock, $.01 par value, 150,000,000 shares authorized, 106,016,287 and 100,746,988 shares issued and outstanding, respectively	1,060			1,007
Additional paid-in capital	4,350,917			3,976,953
Distributions in excess of earnings	(58,467		)	(48,053		)
Total stockholders’ equity	4,293,510			3,929,907
Noncontrolling Interests (Notes 2 and 11):
Common units of the Operating Partnership	81,917			78,991
Noncontrolling interests in consolidated property partnerships	195,431			192,363
Total noncontrolling interests	277,348			271,354
Total equity	4,570,858			4,201,261
TOTAL LIABILITIES AND EQUITY	$	8,900,094		$	7,765,707

See accompanying notes to consolidated financial statements.

F - 4

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share data)

	Year Ended December 31,
	2019			2018			2017
REVENUES (Note 2):
Rental income	$	826,472		$	656,631		$	633,896
Tenant reimbursements	—			80,982			76,559
Other property income	10,982			9,685			8,546
Total revenues	837,454			747,298			719,001
EXPENSES:
Property expenses (Note 2)	160,037			133,787			129,971
Real estate taxes (Note 2)	78,097			70,820			66,449
Provision for bad debts (Notes 2 and 20)	—			5,685			3,269
Ground leases (Notes 2, 5 and 18)	8,113			6,176			6,337
General and administrative expenses (Note 15)	88,139			90,471			60,581
Leasing costs (Notes 2 and 5)	7,615			—			—
Depreciation and amortization (Notes 2 and 5)	273,130			254,281			245,886
Total expenses	615,131			561,220			512,493
OTHER (EXPENSES) INCOME:
Interest income and other net investment gain (loss) (Note 19)	4,641			(559		)	5,503
Interest expense (Note 9)	(48,537		)	(49,721		)	(66,040		)
Loss on early extinguishment of debt (Note 9)	—			(12,623		)	(5,312		)
Net gain on sales of land (Note 4)	—			11,825			449
Gains on sales of depreciable operating properties (Note 4)	36,802			142,926			39,507
Total other (expenses) income	(7,094		)	91,848			(25,893		)
NET INCOME	215,229			277,926			180,615
Net income attributable to noncontrolling common units of the Operating Partnership (Notes 2 and 11)	(3,766		)	(5,193		)	(3,223		)
Net income attributable to noncontrolling interests in consolidated property partnerships (Notes 2 and 11)	(16,020		)	(14,318		)	(12,780		)
Total income attributable to noncontrolling interests	(19,786		)	(19,511		)	(16,003		)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	195,443			258,415			164,612
Preferred dividends (Note 13)	—			—			(5,774		)
Original issuance costs of redeemed preferred stock and preferred units (Note 13)	—			—			(7,589		)
Total preferred dividends	—			—			(13,363		)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$	195,443		$	258,415		$	151,249
Net income available to common stockholders per share – basic (Note 21)	$	1.87		$	2.56		$	1.52
Net income available to common stockholders per share – diluted (Note 21)	$	1.86		$	2.55		$	1.51
Weighted average shares of common stock outstanding – basic (Note 21)	103,200,568			99,972,359			98,113,561
Weighted average shares of common stock outstanding – diluted (Note 21)	103,849,168			100,482,365			98,727,331

See accompanying notes to consolidated financial statements.

F - 5

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except share and per share/unit data)

	Preferred Stock			Common Stock											Total Stock- holders’ Equity			Noncontrolling  Interests			Total Equity
				Number  of Shares		Common Stock			Additional Paid-in Capital			Distributions in Excess of Earnings
BALANCE AS OF DECEMBER 31, 2016	$	192,411		93,219,439		$	932		$	3,457,649		$	(107,997	)	$	3,542,995		$	216,322		$	3,759,317
Net income												164,612			164,612			16,003			180,615
Redemption of Series G & H Preferred stock	(192,411		)									(7,589		)	(200,000		)				(200,000		)
Issuance of common stock				4,662,577		46			326,012						326,058						326,058
Issuance of share-based compensation awards									5,890						5,890						5,890
Non-cash amortization of share-based compensation									26,319						26,319						26,319
Exercise of stock options				285,000		4			12,175						12,179						12,179
Settlement of restricted stock units for shares of common stock				317,848		3			(3		)				—						—
Repurchase of common stock, stock options and restricted stock units				(168,881	)	(2		)	(12,984		)				(12,986		)				(12,986		)
Exchange of common units of the Operating Partnership				304,350		3			10,936						10,939			(10,939		)	—
Contributions from noncontrolling interests in consolidated property partnerships									—						—			54,604			54,604
Distributions to noncontrolling interests in consolidated property partnerships															—			(16,542		)	(16,542		)
Adjustment for noncontrolling interest in the Operating Partnership									(3,502		)				(3,502		)	3,502			—
Preferred dividends and distributions												(5,774		)	(5,774		)				(5,774		)
Dividends declared per share of common stock and common unit ($1.65 per share/unit)												(165,937		)	(165,937		)	(3,427		)	(169,364		)
BALANCE AS OF DECEMBER 31, 2017	—			98,620,333		986			3,822,492			(122,685		)	3,700,793			259,523			3,960,316
Net income												258,415			258,415			19,511			277,926
Issuance of common stock				1,817,195		18			130,675						130,693						130,693
Issuance of share-based compensation awards									3,926						3,926						3,926
Non-cash amortization of share-based compensation									35,890						35,890						35,890
Exercise of stock options				1,000		—			41						41						41
Settlement of restricted stock units for shares of common stock				488,354		4			(4		)				—						—
Repurchase of common stock, stock options and restricted stock units				(231,800	)	(2		)	(16,551		)				(16,553		)				(16,553		)
Exchange of common units of the Operating Partnership				51,906		1			1,961						1,962			(1,962		)	—
Contributions from noncontrolling interests in consolidated property partnerships															—			8,273			8,273
Distributions to noncontrolling interests in consolidated property partnerships															—			(11,803		)	(11,803		)
Adjustment for noncontrolling interest in the Operating Partnership									(1,477		)				(1,477		)	1,477			—
Dividends declared per share of common stock and common unit ($1.79 per share/unit)												(183,783		)	(183,783		)	(3,665		)	(187,448		)
BALANCE AS OF DECEMBER 31, 2018	—			100,746,988		1,007			3,976,953			(48,053		)	3,929,907			271,354			4,201,261
Net income												195,443			195,443			19,786			215,229
Opening adjustment to Distributions in Excess of Earnings upon adoption of ASC 842 (Note 2)												(3,146		)	(3,146		)				(3,146		)
Issuance of common stock (Note 13)				5,000,000		50			353,672						353,722						353,722
Issuance of share-based compensation awards (Note 15)									4,664						4,664						4,664
Non-cash amortization of share-based compensation (Note 15)									32,813						32,813						32,813
Exercise of stock options				16,500		—			703						703						703
Settlement of restricted stock units for shares of common stock (Note 15)				463,276		5			(5		)				—						—
Repurchase and cancellation of common stock, stock options, and restricted stock units (Note 15)				(212,477	)	(2		)	(14,859		)				(14,861		)				(14,861		)
Exchange of common units of the Operating Partnership				2,000		—			78						78			(78		)	—
Distributions to noncontrolling interests in consolidated property partnerships															—			(12,952		)	(12,952		)
Adjustment for noncontrolling interest in the Operating Partnership (Note 2)									(3,102		)				(3,102		)	3,102			—
Dividends declared per share of common stock and common unit ($1.91 per share/unit) (Notes 13 and 28)												(202,711		)	(202,711		)	(3,864		)	(206,575		)
BALANCE AS OF DECEMBER 31, 2019	$	—		106,016,287		$	1,060		$	4,350,917		$	(58,467	)	$	4,293,510		$	277,348		$	4,570,858

See accompanying notes to consolidated financial statements.

F - 6

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Year Ended December 31,
	2019			2018			2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	215,229		$	277,926		$	180,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	268,045			249,882			241,862
Depreciation of non-real estate furniture, fixtures and equipment	5,085			4,400			4,024
(Recoveries of) provision for bad debts (Notes 2 and 20)	(3,433		)	5,685			3,269
Non-cash amortization of share-based compensation awards (Note 15)	27,007			27,932			19,046
Non-cash amortization of deferred financing costs and net debt discounts	1,427			1,084			3,247
Non-cash amortization of net below market rents (Note 5)	(9,206		)	(9,748		)	(8,528		)
Gains on sales of depreciable operating properties (Note 4)	(36,802		)	(142,926		)	(39,507		)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 10)	(19,190		)	(18,429		)	(16,767		)
Straight-line rents	(72,023		)	(26,976		)	(33,275		)
Amortization of the right of use ground lease asset (Note 2)	683			—			—
Loss on early extinguishment of debt (Note 9)	—			12,623			5,312
(Gain) loss on sale of land (Note 4)	—			(11,825		)	(449		)
Net change in other operating assets	(14,476		)	(7,930		)	(17,732		)
Net change in other operating liabilities	24,175			48,345			5,895
Net cash provided by operating activities	386,521			410,043			347,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(845,464		)	(489,236		)	(397,440		)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	(173,291		)	(311,299		)	(19,829		)
Expenditures for acquisitions of operating properties (Note 3)	(186,258		)	(257,340		)	—
Expenditures for operating properties and other capital assets	(147,687		)	(166,440		)	(88,425		)
Net proceeds received from dispositions (Note 4)	124,421			364,300			182,492
Decrease (increase) in acquisition-related deposits	—			36,000			(35,900		)
Proceeds received from repayment of note receivable	—			15,100			—
Net cash used in investing activities	(1,228,279		)	(808,915		)	(359,102		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 13)	353,722			130,693			326,058
Redemption of Series G and H Preferred stock (Note 13)	—			—			(200,000		)
Net proceeds from the issuance of unsecured debt (Note 9)	499,390			648,537			674,447
Repayments of unsecured debt (Note 9)	—			(261,823		)	(519,024		)
Borrowings on unsecured revolving credit facility	1,110,000			765,000			270,000
Repayments on unsecured revolving credit facility	(910,000		)	(690,000		)	(270,000		)
Borrowings on unsecured debt (Note 9)	—			120,000			—
Principal payments and repayments of secured debt (Note 9)	(76,309		)	(3,584		)	(130,371		)
Financing costs	(6,678		)	(6,262		)	(11,500		)
Repurchase of common stock and restricted stock units (Note 15)	(14,556		)	(16,553		)	(12,986		)
Proceeds from exercise of stock options	703			41			12,179
Contributions from noncontrolling interests in consolidated property partnerships (Note 11)	—			8,273			54,604
Distributions to noncontrolling interests in consolidated property partnerships	(12,952		)	(11,803		)	(16,542		)
Dividends and distributions paid to common stockholders and common unitholders	(196,252		)	(179,411		)	(340,697		)
Dividends and distributions paid to preferred stockholders and preferred unitholders	—			—			(7,409		)
Net cash provided by (used in) financing activities	747,068			503,108			(171,241		)
Net (decrease) increase in cash and cash equivalents and restricted cash	(94,690		)	104,236			(183,331		)
Cash and cash equivalents and restricted cash, beginning of year	171,034			66,798			250,129
Cash and cash equivalents and restricted cash, end of year	$	76,344		$	171,034		$	66,798

See accompanying notes to consolidated financial statements.

F - 7

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Partners of

Kilroy Realty, L.P.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Kilroy Realty, L.P. and subsidiaries (the “Operating Partnership”) as of December 31, 2019 and 2018, the related consolidated statements of operations, capital, and cash flows, for each of the three years in the period ended December 31, 2019, and the related notes and the schedules listed in the Index at Item 15 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Operating Partnership as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Operating Partnership’s internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 13, 2020, expressed an unqualified opinion on the Operating Partnership’s internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Operating Partnership’s management. Our responsibility is to express an opinion on the Operating Partnership’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Operating Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

We have served as the Operating Partnership’s auditor since 2010.

F - 8

KILROY REALTY, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except unit data)

	December 31, 2019			December 31, 2018
ASSETS
REAL ESTATE ASSETS (Notes 2, 3 and 4):
Land and improvements	$	1,466,166		$	1,160,138
Buildings and improvements	5,866,477			5,207,984
Undeveloped land and construction in progress	2,296,130			2,058,510
Total real estate assets held for investment	9,628,773			8,426,632
Accumulated depreciation and amortization	(1,561,361		)	(1,391,368		)
Total real estate assets held for investment, net	8,067,412			7,035,264
CASH AND CASH EQUIVALENTS (Note 24)	60,044			51,604
RESTRICTED CASH (Notes 3, 4 and 24)	16,300			119,430
MARKETABLE SECURITIES (Notes 16 and 19)	27,098			21,779
CURRENT RECEIVABLES, NET (Notes 2, 6 and 20)	26,489			20,176
DEFERRED RENT RECEIVABLES, NET (Notes 2, 6 and 20)	337,937			267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	212,805			197,574
RIGHT OF USE GROUND LEASE ASSET (Note 2 and 18)	96,348			—
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	55,661			52,873
TOTAL ASSETS	$	8,900,094		$	7,765,707
LIABILITIES AND CAPITAL
LIABILITIES:
Secured debt, net (Notes 9 and 19)	$	258,593		$	335,531
Unsecured debt, net (Notes 9 and 19)	3,049,185			2,552,070
Unsecured line of credit (Notes 9 and 19)	245,000			45,000
Accounts payable, accrued expenses and other liabilities (Note 18)	418,848			374,415
Ground lease liabilities (Note 2 and 18)	98,400			—
Accrued distributions (Notes 14 and 28)	53,219			47,559
Deferred revenue and acquisition-related intangible liabilities, net (Notes 3, 5 and 10)	139,488			149,646
Rents received in advance and tenant security deposits	66,503			60,225
Total liabilities	4,329,236			3,564,446
COMMITMENTS AND CONTINGENCIES (Note 18)
CAPITAL:
Common units, 106,016,287 and 100,746,988 held by the general partner and 2,023,287 and 2,025,287 held by common limited partners issued and outstanding, respectively (Note 14)	4,369,758			4,003,700
Total partners’ capital	4,369,758			4,003,700
Noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	201,100			197,561
Total capital	4,570,858			4,201,261
TOTAL LIABILITIES AND CAPITAL	$	8,900,094		$	7,765,707

See accompanying notes to consolidated financial statements.

F - 9

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except unit and per unit data)

	Year Ended December 31,
	2019			2018			2017
REVENUES (Note 2):
Rental income	$	826,472		$	656,631		$	633,896
Tenant reimbursements	—			80,982			76,559
Other property income	10,982			9,685			8,546
Total revenues	837,454			747,298			719,001
EXPENSES:
Property expenses (Note 2)	160,037			133,787			129,971
Real estate taxes (Note 2)	78,097			70,820			66,449
Provision for bad debts (Notes 2 and 20)	—			5,685			3,269
Ground leases (Notes 2, 5 and 18)	8,113			6,176			6,337
General and administrative expenses (Note 15)	88,139			90,471			60,581
Leasing costs (Notes 2 and 5)	7,615			—			—
Depreciation and amortization (Notes 2 and 5)	273,130			254,281			245,886
Total expenses	615,131			561,220			512,493
OTHER (EXPENSES) INCOME:
Interest income and other net investment gain (loss) (Note 19)	4,641			(559		)	5,503
Interest expense (Note 9)	(48,537		)	(49,721		)	(66,040		)
Loss on early extinguishment of debt (Note 9)	—			(12,623		)	(5,312		)
Net gain on sales of land (Note 4)	—			11,825			449
Gains on sales of depreciable operating properties (Note 4)	36,802			142,926			39,507
Total other (expenses) income	(7,094		)	91,848			(25,893		)
NET INCOME	215,229			277,926			180,615
Net income attributable to noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	(16,491		)	(14,716		)	(13,175		)
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	198,738			263,210			167,440
Preferred distributions (Note 14)	—			—			(5,774		)
Original issuance costs of redeemed preferred units (Note 14)	—			—			(7,589		)
Total preferred distributions	—			—			(13,363		)
NET INCOME AVAILABLE TO COMMON UNITHOLDERS	$	198,738		$	263,210		$	154,077
Net income available to common unitholders per unit – basic (Note 22)	$	1.87		$	2.56		$	1.52
Net income available to common unitholders per unit – diluted (Note 22)	$1.86			$	2.55		$	1.51
Weighted average common units outstanding – basic (Note 22)	105,223,975			102,025,276			100,246,567
Weighted average common units outstanding – diluted (Note 22)	105,872,575			102,535,282			100,860,337

See accompanying notes to consolidated financial statements.

F - 10

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CAPITAL

(in thousands, except unit and per unit data)

	Partners’ Capital								Total Partners’ Capital			Noncontrolling Interests in Consolidated Property Partnerships and Subsidiaries
	Preferred Units			Number of Common Units		Common Units									Total Capital
BALANCE AS OF DECEMBER 31, 2016	$	192,411		95,600,982		$	3,431,768		$	3,624,179		$	135,138		$	3,759,317
Net income						167,440			167,440			13,175			180,615
Redemption of Series G & H Preferred stock	(192,411		)			(7,589		)	(200,000		)				(200,000		)
Issuance of common units				4,662,577		326,058			326,058						326,058
Issuance of share-based compensation awards						5,890			5,890						5,890
Non-cash amortization of share-based compensation						26,319			26,319						26,319
Exercise of stock options				285,000		12,179			12,179						12,179
Settlement of restricted stock units				317,848		—			—						—
Repurchase of common units and restricted stock units				(168,881	)	(12,986		)	(12,986		)				(12,986		)
Contributions from noncontrolling interest in consolidated property partnership												54,604			54,604
Distributions to noncontrolling interests in consolidated property partnerships												(16,542		)	(16,542		)
Preferred distributions						(5,774		)	(5,774		)				(5,774		)
Distributions declared per common unit ($1.65 per unit)						(169,364		)	(169,364		)				(169,364		)
BALANCE AS OF DECEMBER 31, 2017	—			100,697,526		3,773,941			3,773,941			186,375			3,960,316
Net income						263,210			263,210			14,716			277,926
Issuance of common units				1,817,195		130,693			130,693						130,693
Issuance of share-based compensation awards						3,926			3,926						3,926
Non-cash amortization of share-based compensation						35,890			35,890						35,890
Exercise of stock options				1,000		41			41						41
Settlement of restricted stock units				488,354		—			—						—
Repurchase of common units and restricted stock units				(231,800	)	(16,553		)	(16,553		)				(16,553		)
Contributions from noncontrolling interest in consolidated property partnership						—			—			8,273			8,273
Distributions to noncontrolling interests in consolidated property partnerships												(11,803		)	(11,803		)
Distributions declared per common unit ($1.79 per unit)						(187,448		)	(187,448		)				(187,448		)
BALANCE AS OF DECEMBER 31, 2018	—			102,772,275		4,003,700			4,003,700			197,561			4,201,261
Net income						198,738			198,738			16,491			215,229
Opening adjustment to Partners’ Capital upon adoption of ASC 842 (Note 2)						(3,146		)	(3,146		)				(3,146		)
Issuance of common units (Note 14)				5,000,000		353,722			353,722						353,722
Issuance of share-based compensation awards (Note 15)						4,664			4,664						4,664
Non-cash amortization of share-based compensation (Note 15)						32,813			32,813						32,813
Exercise of stock options				16,500		703			703						703
Settlement of restricted stock units (Note 15)				463,276		—			—						—
Repurchase and cancellation of common units, stock options, and restricted stock units (Note 15)				(212,477	)	(14,861		)	(14,861		)				(14,861		)
Distributions to noncontrolling interests in consolidated property partnerships												(12,952		)	(12,952		)
Distributions declared per common unit ($1.91 per unit) (Notes 14 and 28)						(206,575		)	(206,575		)				(206,575		)
BALANCE AS OF DECEMBER 31, 2019	$	—		108,039,574		$	4,369,758		$	4,369,758		$	201,100		$	4,570,858

See accompanying notes to consolidated financial statements.

F - 11

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Year Ended December 31,
	2019			2018			2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	215,229		$	277,926		$	180,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	268,045			249,882			241,862
Depreciation of non-real estate furniture, fixtures and equipment	5,085			4,400			4,024
(Recoveries of) provision for bad debts (Notes 2 and 20)	(3,433		)	5,685			3,269
Non-cash amortization of share-based compensation awards (Note 15)	27,007			27,932			19,046
Non-cash amortization of deferred financing costs and net debt discounts	1,427			1,084			3,247
Non-cash amortization of net below market rents (Note 5)	(9,206		)	(9,748		)	(8,528		)
Gains on sales of depreciable operating properties (Note 4)	(36,802		)	(142,926		)	(39,507		)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 10)	(19,190		)	(18,429		)	(16,767		)
Straight-line rents	(72,023		)	(26,976		)	(33,275		)
Amortization of right of use ground lease assets (Note 2)	683			—			—
Loss on early extinguishment of debt (Note 9)	—			12,623			5,312
(Gain) loss on sale of land (Note 4)	—			(11,825		)	(449		)
Net change in other operating assets	(14,476		)	(7,930		)	(17,732		)
Net change in other operating liabilities	24,175			48,345			5,895
Net cash provided by operating activities	386,521			410,043			347,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(845,464		)	(489,236		)	(397,440		)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	(173,291		)	(311,299		)	(19,829		)
Expenditures for acquisitions of operating properties (Note 3)	(186,258		)	(257,340		)	—
Expenditures for operating properties and other capital assets	(147,687		)	(166,440		)	(88,425		)
Net proceeds received from dispositions (Note 4)	124,421			364,300			182,492
Decrease (increase) in acquisition-related deposits	—			36,000			(35,900		)
Proceeds received from repayment of note receivable	—			15,100			—
Net cash used in investing activities	(1,228,279		)	(808,915		)	(359,102		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common units (Note 14)	353,722			130,693			326,058
Redemption of Series G and H Preferred units (Note 14)	—			—			(200,000		)
Net proceeds from the issuance of unsecured debt (Note 9)	499,390			648,537			674,447
Repayments of unsecured debt (Note 9)	—			(261,823		)	(519,024		)
Borrowings on unsecured revolving credit facility	1,110,000			765,000			270,000
Repayments on unsecured revolving credit facility	(910,000		)	(690,000		)	(270,000		)
Borrowings on unsecured debt (Note 9)	—			120,000			—
Principal payments and repayments of secured debt (Note 9)	(76,309		)	(3,584		)	(130,371		)
Financing costs	(6,678		)	(6,262		)	(11,500		)
Repurchase of common units and restricted stock units (Note 15)	(14,556		)	(16,553		)	(12,986		)
Proceeds from exercise of stock options	703			41			12,179
Contributions from noncontrolling interests in consolidated property partnerships (Note 12)	—			8,273			54,604
Distributions to noncontrolling interests in consolidated property partnerships	(12,952		)	(11,803		)	(16,542		)
Distributions paid to common unitholders	(196,252		)	(179,411		)	(340,697		)
Distributions paid to preferred unitholders	—			—			(7,409		)
Net cash provided by (used in) financing activities	747,068			503,108			(171,241		)
Net (decrease) increase in cash and cash equivalents and restricted cash	(94,690		)	104,236			(183,331		)
Cash and cash equivalents and restricted cash, beginning of year	171,034			66,798			250,129
Cash and cash equivalents and restricted cash, end of year	$	76,344		$	171,034		$	66,798

See accompanying notes to consolidated financial statements.

F - 12

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Ownership

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in premier office and mixed-use submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Greater Los Angeles, San Diego County, the San Francisco Bay Area and Greater Seattle, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We generally conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the terms “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” refer to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2019:

	Number of Buildings	Rentable Square Feet (unaudited)	Number of Tenants	Percentage  Occupied (unaudited)		Percentage Leased (unaudited)
Stabilized Office Properties	112	13,475,795	451	94.6	%	97.0	%

	Number of Buildings	Number of Units	2019 Average Occupancy (unaudited)
Stabilized Residential Property	1	200	82.4	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently committed for construction, under construction, or in the tenant improvement phase, undeveloped land, recently completed residential properties not yet stabilized and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and retail properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets at the historical cost of the property as the projects are placed in service.

During the year ended December 31, 2019, we added one completed development project to our stabilized office portfolio consisting of 394,340 square feet in San Francisco, California. As of December 31, 2019, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2019.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

	Number of Properties/Projects	Estimated Rentable Square Feet (1) / Units (unaudited)
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

_______________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

Our stabilized portfolio also excludes our future development pipeline, which as of December 31, 2019 was comprised of five future development sites, representing approximately 61 gross acres of undeveloped land.

As of December 31, 2019, all of our properties and development projects were owned and all of our business was conducted in the state of California with the exception of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. All of our properties and development projects are 100% owned, excluding four office properties owned by three consolidated property partnerships and two development projects held by consolidated variable interest entities established to facilitate potential transactions intended to qualify as like-kind exchanges pursuant to Section 1031 of the Code (“Section 1031 Exchange”). Two of the three consolidated property partnerships, 100 First Street Member, LLC (“100 First LLC”) and 303 Second Street Member, LLC (“303 Second LLC”), each owned one office property in San Francisco, California through subsidiary REITs. As of December 31, 2019, the Company owned a 56% common equity interest in both 100 First LLC and 303 Second LLC. The third consolidated property partnership, Redwood City Partners, LLC (“Redwood LLC”) owned two office properties in Redwood City, California. As of December 31, 2019, the Company owned an approximate 93% common equity interest in Redwood LLC. The remaining interests in all three property partnerships were owned by unrelated third parties.

As of December 31, 2019, the Company owned an approximate 98.1% common general partnership interest in the Operating Partnership. The remaining approximate 1.9% common limited partnership interest in the Operating Partnership as of December 31, 2019 was owned by non-affiliated investors and certain of our executive officers and directors. Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. Generally, the number of common units held by the Company is equivalent to the number of outstanding shares of the Company’s common stock, and the rights of all the common units to quarterly distributions and payments in liquidation mirror those of the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Seventh Amended and Restated Agreement of Limited Partnership, as amended, the “Partnership Agreement”.

Kilroy Realty Finance, Inc., which is a wholly-owned subsidiary of the Company, is the sole general partner of the Finance Partnership and owns a 1.0% common general partnership interest in the Finance Partnership. The Operating Partnership owns the remaining 99.0% common limited partnership interest. With the exception of the Operating Partnership and our consolidated property partnerships, all of our subsidiaries are wholly-owned.

2. Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Partially Owned Entities and Variable Interest Entities

At December 31, 2019 the consolidated financial statements of the Company included four VIEs in addition to the Operating Partnership: two of the consolidated property partnerships, 100 First LLC, 303 Second LLC, and two entities established during the fourth quarter of 2019 to facilitate potential future Section 1031 Exchanges. At December 31, 2019, the Company and the Operating Partnership were determined to be the primary beneficiaries of these four VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. As of December 31, 2019, the four VIEs’ total assets, liabilities and noncontrolling interests included on our consolidated balance sheet were approximately $676.7 million (of which $598.0 million related to real estate held for investment), approximately $40.1 million and approximately $189.6 million, respectively. Revenues, income and net assets generated by 100 First LLC and 303 Second LLC may only be used to settle their contractual obligations, which primarily consist of operating expenses, capital expenditures and required distributions.

At December 31, 2018, the consolidated financial statements of the Company included three VIEs in addition to the Operating Partnership: two of the consolidated property partnerships, 100 First LLC and 303 Second LLC, and an entity established during the fourth quarter of 2018 to facilitate a Section 1031 Exchange. At December 31, 2018, the Company and the Operating Partnership were determined to be the primary beneficiaries of these three VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. At December 31, 2018, the three VIEs’ total assets, liabilities and noncontrolling interests included on our consolidated balance sheet were approximately $615.4 million (of which $543.9 million related to real estate held for investment on our consolidated balance sheet), approximately $45.1 million and approximately $186.4 million, respectively. In January 2019, the Section 1031 Exchange was successfully completed and the related VIE was terminated.

Our accounting policy is to consolidate entities in which we have a controlling financial interest and significant decision making control over the entity's operations. In determining whether we have a controlling financial interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, size of our investment (including loans), authority to control decisions, and contractual and substantive participating rights of the members. In addition to evaluating control rights, we consolidate entities in which the other members have no substantive kick-out rights to remove the Company as the managing member.

Entities in which the equity investors do not have sufficient equity at risk to finance their endeavors without additional financial support or the holders of the equity investment at risk do not have a controlling financial interest are VIEs. We evaluate whether an entity is a VIE and whether we are the primary beneficiary. We are deemed to be the primary beneficiary of a VIE when we have the power to direct the activities of the VIE that most significantly impact the VIEs’ economic performance and the obligation to absorb losses or receive benefits that could potentially be significant to the VIE.

If the requirements for consolidation are not met, the Company would account for investments under the equity method of accounting if we have the ability to exercise significant influence over the entity. Equity method investments would be initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period. The Company did not have any equity method investments at December 31, 2019 or 2018.

Accounting Pronouncements Adopted January 1, 2019

Effective January 1, 2019, we adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-02 “Leases (Topic 842)” (“Topic 842”) and the related FASB ASU Nos. 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01 which provide practical expedients, technical corrections and improvements for certain aspects of ASU 2016-02, on a modified retrospective basis. Topic 842 establishes a single comprehensive model for entities to use in accounting for leases and supersedes the existing leasing guidance. We evaluated each of the Company’s contracts to determine if the contract is or contains a lease and concluded that Topic 842 is applicable to the Company as a lessor in its tenant lease agreements and as a lessee in its ground leases.

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Lessor Accounting

As a lessor, the Company’s leases with tenants for its real estate assets generally provide for the lease of space, as well as common area maintenance and parking. Under Topic 842, the lease of space is considered a lease component while the common area maintenance billings and tenant parking are considered nonlease components, which fall under revenue recognition guidance in FASB Accounting Standards Codification Topic 606 “Revenue from Contracts with Customers” (“Topic 606”). However, upon adopting the guidance in Topic 842, the Company determined that its tenant leases met the criteria to apply the practical expedient provided by ASU 2018-11 to recognize the lease and non-lease components together as one single component. This conclusion was based on the consideration that 1) the timing and pattern of transfer of the nonlease components and associated lease component are the same, and 2) the lease component, if accounted for separately, would be classified as an operating lease. As the lease of space is the predominant component of the Company’s leasing arrangements, we accounted for all lease and non-lease components as one single component under Topic 842. As a result, the adoption of Topic 842 did not have any impact on the Company’s timing or pattern of recognition of rental revenues as compared to previous guidance. Transient daily parking revenue is accounted for under the guidance in Topic 606 and included in other property income in our consolidated statements of operations.

To reflect their recognition as one lease component, base rental revenues, additional rental revenues (which consist of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs) and other lease related property income related to leases that also meet the requirements of the practical expedient provided by ASU 2018-11 have been combined in one line item subsequent to the adoption of Topic 842 for the year ended December 31, 2019 in rental income on the Company’s consolidated statements of operations. In addition, under Topic 842, lessor costs for certain services directly reimbursed by tenants, which were previously presented on a net basis under previous guidance, are required to be presented on a gross basis in revenues and expenses. During the year ended December 31, 2019, we incurred additional property expenses of $13.9 million for which we were reimbursed, that were not required to be grossed up under the previous guidance. We presented this amount on a gross basis within rental income and property expenses in the Company’s consolidated statements of operations as a result of the adoption, which had no impact on net income.

Our rental income is mostly comprised of fixed contractual payments defined under the lease that, in most cases, escalate annually over the term of the lease at fixed rates. Additionally, rental income includes variable payments for tenant reimbursements of property-related expenses and payments based on a percentage of tenant’s sales. The table below sets forth the allocation of rental income between fixed and variable payments for the year ended December 31, 2019:

	Year Ended
	December 31, 2019
	(in thousands)
Fixed lease payments	$	710,557
Variable lease payments	115,915
Total rental income	$	826,472

Upon the adoption of Topic 842 on January 1, 2019, the method for recognizing revenue includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. For leases that are deemed probable of collection, revenue is recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination. Refer to our Significant Accounting Policies below for further discussion of our revenue recognition and allowance for uncollectible tenant and deferred rent receivables policies.

Leasing Costs

Upon adoption of Topic 842, the Company elected to apply the package of practical expedients provided and did not reassess the following as of January 1, 2019: 1) whether any expired or existing contracts are or contain leases; 2) the lease classification for any expired or existing leases; and 3) initial direct costs for any existing leases. Under Topic 842, initial direct costs for both lessees and lessors would include only those costs that are incremental to the arrangement and would not have been incurred if the lease had not been obtained. As a result, beginning January 1, 2019, the

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Company no longer capitalized internal leasing costs and third-party legal leasing costs and instead expensed these costs as incurred. These expenses are included in leasing costs and general and administrative expenses on our consolidated statements of operations in 2019. During the year ended December 31, 2019, the Company expensed approximately $11.4 million of indirect leasing costs which would have been capitalized prior to the adoption of Topic 842.

The election of the package of practical expedients described above permits us to continue to account for our leases that commenced before January 1, 2019 under the previously existing lease accounting guidance for the remainder of their lease terms, and to apply the new lease accounting guidance to leases commencing or modified after January 1, 2019. On January 1, 2019, we recognized a $3.1 million cumulative-effect adjustment, primarily related to internal leasing costs and legal leasing costs for tenant leases that had not commenced prior to that date, to increase distributions in excess of earnings for the Company and partners’ capital for the Operating Partnership in connection with our adoption of Topic 842.

Lessee Accounting

The Company’s ground leases are the primary contracts in which we are the lessee. Upon adoption of Topic 842 on January 1, 2019, the Company had four existing ground leases which were classified as operating leases. As discussed above, the Company elected to apply the package of practical expedients provided by Topic 842 and therefore did not reassess the classification of these ground leases. Existing ground leases that commenced before the January 1, 2019 adoption date continued to be accounted for as operating leases, and the new guidance did not have a material impact on our recognition of ground lease expense or our results of operations. However, for periods beginning after January 1, 2019, we are now required to recognize a lease liability on our consolidated balance sheets equal to the present value of the minimum future lease payments required in accordance with each ground lease, as well as a right of use asset equal to the lease liability adjusted for above and below market intangibles and deferred leasing costs. To determine the discount rates used to calculate the present value of the lease payments, we used a hypothetical curve derived from unsecured corporate borrowing rates over the lease terms. The weighted average discount rate for our four existing ground leases was 5.15%. The adoption of Topic 842 resulted in the recognition of right of use ground lease assets totaling $82.9 million and ground lease liabilities totaling $87.4 million on January 1, 2019. There was no material impact to our consolidated statements of operations or consolidated statements of cash flows as a result of adoption of this new guidance. For further information related to our ground leases, refer to Note 18 “Commitments and Contingencies.”

For leases with a term of 12 months or less where we are the lessee, we made an accounting policy election by class of underlying asset not to recognize right of use lease assets and lease liabilities. We recognize lease expense for such leases generally on a straight-line basis over the lease term.

Significant Accounting Policies

Revenue Recognition

Rental revenue for office and retail operating properties is our principal source of revenue. We recognize revenue from base rent, additional rent (which consists of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs), parking and other lease-related revenue once all of the following criteria are met: (i) the agreement has been fully executed and delivered, (ii) services have been rendered, (iii) the amount is fixed or determinable and (iv) payment has been received or the collectability of the amount due is probable. Lease termination fees are amortized over the remaining lease term, if applicable. If there is no remaining lease term, they are recognized when received and realized. Minimum annual rental revenues are recognized in rental revenues on a straight-line basis over the non-cancellable term of the related lease.

Base Rent

The timing of when we commence rental revenue recognition for office and retail properties depends largely on our conclusion as to whether the Company or the tenant is the owner for accounting purposes of tenant improvements at the leased property. When we conclude that we are the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements as an asset and commence rental revenue recognition when the tenant takes possession of or controls the finished space, which is generally when tenant improvements being recorded

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

as our assets are substantially complete. In certain instances, when we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, rental revenue recognition begins when the tenant takes possession or controls the physical use of the leased space, which may occur in phases or for an entire building or project. The determination of who owns the tenant improvements is made on a lease-by-lease basis and has a significant effect on the timing of commencement of revenue recognition.

When we conclude that the Company is the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements, including costs paid for or reimbursed by the tenants, as a capital asset. For these tenant-funded tenant improvements, we record the amount funded by or reimbursed by tenants as deferred revenue, which is amortized and recognized as rental income on a straight-line basis over the term of the related lease.

When we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, we record our contribution towards those tenant-owned improvements as a lease incentive, which is included in deferred leasing costs and acquisition-related intangible assets, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease.

For residential properties, we commence revenue recognition upon lease commencement. Residential rental revenue is recognized on a straight-line basis over the term of the related lease, net of any concessions.

Additional Rent - Reimbursements from Tenants

Additional rent, consisting of amounts due from tenants for common area maintenance, real estate taxes and other recoverable costs, are recognized in rental income in the period the recoverable costs are incurred. Prior to the adoption of Topic 842, such amounts were recognized in revenue as tenant reimbursements. Additional rent where we pay the associated costs directly to third-party vendors and are reimbursed by our tenants are recognized and recorded on a gross basis, with the corresponding expense recognized in property expenses or real estate taxes. Prior to the adoption of Topic 842, recoverable costs were generally recognized and recorded on a gross basis when we were the primary obligor with respect to purchasing goods and services from third-party suppliers, had discretion in selecting the supplier, and had credit risk.

Other Property Income

Other property income primarily includes amounts recorded in connection with transient daily parking, tenant bankruptcy settlement payments, broken deal income and property damage settlement related payments. Other property income also includes miscellaneous income from tenants, restoration fees and fees for late rental payments. Amounts recorded within other property income fall within the scope of Topic 606 and are recognized as revenue at the point in time when control of the goods or services transfers to the customer and our performance obligation is satisfied.

Uncollectible Lease Receivables and Allowances for Tenant and Deferred Rent Receivables

We carry our current and deferred rent receivables net of allowances for amounts that may not be collected. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations. Upon the adoption of Topic 842 on January 1, 2019, the allowances are increased or decreased through rental income, and our determination of the adequacy of the Company’s allowances for tenant receivables includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. Such assessment involves using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. For leases that are deemed probable of collection, revenue continues to be recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

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For tenant and deferred rent receivables associated with leases whose rents are deemed probable of collection under Topic 842, we may record an allowance under other authoritative GAAP using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Tenant and deferred rent receivables deemed probable of collection are carried net of allowances for uncollectible accounts, with increases or decreases in the allowances recorded through rental income on our consolidated statements of operations. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations.

Current tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. With respect to the allowance for uncollectible tenant receivables, the specific identification methodology analysis relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, our assessment of the tenant’s ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant.

Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds cash rents billed to date under the lease agreement. With respect to the allowance for deferred rent receivables, given the longer-term nature of these receivables, the specific identification methodology analysis evaluates each of our significant tenants and any tenants on our internal watchlist and relies on factors such as each tenant’s financial condition and its ability to meet its lease obligations. We evaluate our reserve levels quarterly based on changes in the financial condition of tenants and our assessment of the tenant’s ability to meet its lease obligations, overall economic conditions, and the current business environment.

Acquisitions

Acquisitions of operating properties and development and redevelopment opportunities generally do not meet the definition of a business and are accounted for as asset acquisitions, as substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. For these asset acquisitions, we record the acquired tangible and intangible assets and assumed liabilities based on each asset’s and liability’s relative fair value at the acquisition date of the total purchase price plus any capitalized acquisition costs. We record the acquired tangible and intangible assets and assumed liabilities of acquisitions of operating properties and development and redevelopment opportunities that meet the accounting criteria to be accounted for as business combinations at fair value at the acquisition date. Transaction costs associated with asset acquisitions are capitalized as part of the purchase price of the acquisition.

The acquired assets and assumed liabilities for an acquisition generally include but are not limited to (i) land and improvements, buildings and improvements, undeveloped land and construction in progress and (ii) identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market operating leases and ground leases, acquired in-place lease values and tenant relationships, if any. Any debt assumed and equity (including common units of the Operating Partnership) issued in connection with a property acquisition is recorded at fair value on the date of acquisition.

The fair value of land and improvements is derived from comparable sales of land and improvements within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements and leasing costs considers the value of the property as if it was vacant as well as current replacement costs and other relevant market rate information.

The fair value of the above-market or below-market component of an acquired in-place operating lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining non-cancellable lease term and (ii) our estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition measured over the remaining non-cancellable term of the lease for above-market operating leases and the initial non-cancellable term plus the term of any below-market fixed rate renewal options, if applicable, for below-market operating leases. Our below-market operating leases generally do not include fixed rate or below-market renewal options. The amounts recorded for above-market operating leases are included in deferred leasing costs and acquisition-related intangible assets, net on the

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balance sheet and are amortized on a straight-line basis as a reduction of rental income over the remaining term of the applicable leases. The amounts recorded for below-market operating leases are included in deferred revenue and acquisition-related intangible liabilities, net on the balance sheet and are amortized on a straight-line basis as an increase to rental income over the remaining term of the applicable leases plus the term of any below-market fixed rate renewal options, if applicable. The amortization of a below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented. The amortization of an above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The fair value of acquired in-place leases is derived based on our assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. The amount recorded for acquired in-place leases is included in deferred leasing costs and acquisition-related intangible assets, net on the balance sheet and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. Fully amortized intangible assets are written off each quarter.

Operating Properties

Operating properties are generally carried at historical cost less accumulated depreciation. Properties held for sale are reported at the lower of the carrying value or the fair value less estimated cost to sell. The cost of operating properties includes the purchase price or development costs of the properties. Costs incurred for the renovation and betterment of the operating properties are capitalized to our investment in that property. Maintenance and repairs are charged to expense as incurred.

When evaluating properties to be held and used for potential impairment, we first evaluate whether there are any indicators of impairment for any of our properties. If any impairment indicators are present for a specific property, we then evaluate the regional market conditions that could reasonably affect the property. If there are negative changes and trends in that regional market, we then perform an undiscounted cash flow analysis and compare the net carrying amount of the property to the property’s estimated undiscounted future cash flow over the anticipated holding period. If the estimated undiscounted future cash flow is less than the net carrying amount of the property, we perform an impairment loss calculation to determine if the fair value of the property is less than the net carrying value of the property. Our impairment loss calculation compares the net carrying amount of the property to the property’s estimated fair value, which may be based on estimated discounted future cash flow calculations or third-party valuations or appraisals. We would recognize an impairment loss if the property's net carrying amount exceeds the property's estimated fair value. If we were to recognize an impairment loss, the estimated fair value of the property becomes its new cost basis. For a depreciable long-lived asset, the new cost basis would be depreciated (amortized) over the remaining useful life of that asset.

Cost Capitalization

All costs clearly associated with the development, redevelopment and construction of a property are capitalized as project costs, including internal compensation costs. In addition, the following costs are capitalized as project costs during periods in which activities necessary to prepare development and redevelopment properties for their intended use are in progress: pre-construction costs essential to the development of the property, interest, real estate taxes and insurance.

• For office and retail development and redevelopment properties that are pre-leased, we cease capitalization when revenue recognition commences, which is upon substantial completion of tenant improvements deemed to be the Company’s asset for accounting purposes.

• For office and retail development and redevelopment properties that are not pre-leased, we may not immediately build out the tenant improvements. Therefore, we cease capitalization when revenue recognition commences upon substantial completion of the tenant improvements deemed to be the Company's asset for accounting purposes, but in any event, no later than one year after the cessation of major construction activities. We also cease capitalization on a development or redevelopment property when activities necessary to prepare the property for its intended use have been suspended.

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• For office and retail development or redevelopment properties with multiple tenants and staged leasing, we cease capitalization and begin depreciation on the portion of the development or redevelopment property for which revenue recognition has commenced.

• For residential development properties, we cease capitalization when the property is substantially complete and available for occupancy.

Once major base building construction activities have ceased and the development or redevelopment property or phases of the development or redevelopment project is placed in service, which may occur in phases or for an entire building or project, the costs capitalized to construction in progress are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets as the historical cost of the property.

Depreciation and Amortization of Buildings and Improvements

The costs of buildings and improvements and tenant improvements are depreciated using the straight-line method of accounting over the estimated useful lives set forth in the table below. Depreciation expense for buildings and improvements for the three years ended December 31, 2019, 2018, and 2017 was $211.9 million, $198.6 million, and $190.5 million, respectively.

Asset Description	Depreciable Lives
Buildings and improvements	25 – 40 years
Tenant improvements	1 – 20 years (1)

________________________

(1) Tenant improvements are amortized over the shorter of the lease term or the estimated useful life. 

Real Estate Assets Held for Sale, Dispositions and Discontinued Operations

A real estate asset is classified as held for sale when certain criteria are met, including but not limited to the availability of the asset for immediate sale, the existence of an active program to locate a buyer and the probable sale or transfer of the asset within one year. If such criteria are met, we present the applicable assets and liabilities related to the real estate asset, if material, separately on the balance sheet as held for sale and we would cease to record depreciation and amortization expense. Real estate assets held for sale are reported at the lower of their carrying value or their estimated fair value less the estimated costs to sell. As of December 31, 2019 and 2018, we did not have any properties classified as held for sale.

Property disposals representing a strategic shift that have (or will have) a major effect on the Company’s operations and financial results, such as a major line of business, a major geographical area or a major equity investment, are required to be presented as discontinued operations. If we were to determine that a property disposition represents a strategic shift, the revenues, expenses and net gain (loss) on dispositions of the property would be recorded in discontinued operations for all periods presented through the date of the applicable disposition. The operations of the properties sold during the years ended December 31, 2019, 2018 and 2017 are presented in continuing operations as they did not represent a strategic shift in the Company’s operations and financial results.

The net gains (losses) on dispositions of non-depreciable real estate property, including land, are reported in the consolidated statements of operations as gains (losses) on sale of land within continuing operations in the period the land is sold. The net gains (losses) on dispositions of depreciable real estate property are reported in the consolidated statements of operations as gains on sales of depreciable operating properties within continuing operations in the period the land is sold.

Cash and Cash Equivalents

We consider all highly-liquid investments with original maturities of three months or less to be cash equivalents.

Restricted Cash

Restricted cash consists of cash proceeds from dispositions that are temporarily held at qualified intermediaries for purposes of facilitating potential Section 1031 Exchanges and cash held in escrow related to acquisition and

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

disposition holdbacks. Restricted cash also includes cash held as collateral to provide credit enhancement for the Operating Partnership’s mortgage debt, including cash reserves for capital expenditures, tenant improvements and property taxes. As of December 31, 2019, we did not have any restricted cash held at qualified intermediaries for the purpose of facilitating Section 1031 Exchanges. As of December 31, 2018, we had $113.1 million of restricted cash held at qualified intermediaries for the purpose of facilitating Section 1031 Exchanges. In January 2019, the Section 1031 Exchange was completed and the cash proceeds were released from the qualified intermediary.

Marketable Securities / Deferred Compensation Plan

Marketable securities reported in our consolidated balance sheets represent the assets held in connection with the Kilroy Realty Corporation 2007 Deferred Compensation Plan (the “Deferred Compensation Plan”) (see Note 16 “Employee Benefit Plans” for additional information). The Deferred Compensation Plan assets are held in a limited rabbi trust and invested in various mutual and money market funds. As a result, the marketable securities are treated as trading securities for financial reporting purposes and are adjusted to fair value at the end of each accounting period, with the corresponding gains and losses recorded in interest income and other net investment gains (losses).

At the time eligible management employees (“Participants”) defer compensation or earn mandatory Company contributions, or if we were to make a discretionary contribution, we record compensation cost and a corresponding deferred compensation plan liability, which is included in accounts payable, accrued expenses, and other liabilities on our consolidated balance sheets. This liability is adjusted to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each Participant, and the impact of adjusting the liability to fair value is recorded as an increase or decrease to compensation cost. The impact of adjusting the deferred compensation plan liability to fair value and the changes in the value of the marketable securities held in connection with the Deferred Compensation Plan generally offset and therefore do not significantly impact net income.

Deferred Leasing Costs

Costs incurred in connection with successful property leasing are capitalized as deferred leasing costs and classified as investing activities in the statement of cash flows. Under Topic 842, initial direct costs include only those costs that are incremental to the arrangement and would not have been incurred if the lease had not been obtained. As a result, subsequent to the adoption of Topic 842 on January 1, 2019, deferred leasing costs consist of leasing commissions paid to external third party brokers and lease incentives, and the Company no longer capitalizes internal leasing costs and third-party legal leasing costs. Prior to the adoption of Topic 842, deferred leasing costs consisted primarily of leasing commissions, lease incentives, legal costs and certain internal payroll costs. Deferred leasing costs are amortized using the straight-line method of accounting over the lives of the leases which generally range from one to 20 years. We reevaluate the remaining useful lives of leasing costs as the creditworthiness of our tenants and economic and market conditions change. If we determine that the estimated remaining life of a lease has changed, we adjust the amortization period accordingly. Fully amortized deferred leasing costs are written off each quarter.

Deferred Financing Costs

Financing costs related to the origination or assumption of long-term debt are deferred and generally amortized using the straight-line method of accounting, which approximates the effective interest method, over the contractual terms of the applicable financings. Fully amortized deferred financing costs are written off when the corresponding financing is repaid.

Debt Discounts and Premiums

Original issuance debt discounts and discounts/premiums related to recording debt acquired in connection with operating property acquisitions at fair value are generally amortized and accreted on a straight-line basis, which approximates the effective interest method. Discounts are recorded as additional interest expense from date of issuance or acquisition through the contractual maturity date of the related debt. Premiums are recorded as a reduction to interest expense from the date of issuance or acquisition through the contractual maturity date of the related debt.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Noncontrolling Interests - Common Units of the Operating Partnership in the Company's Consolidated Financial Statements

Common units of the Operating Partnership within noncontrolling interests in the Company’s consolidated financial statements represent the common limited partnership interests in the Operating Partnership not held by the Company (“noncontrolling common units”). Noncontrolling common units are presented in the equity section of the Company’s consolidated balance sheets and are reported at their proportionate share of the net assets of the Operating Partnership. Noncontrolling interests with redemption provisions that permit the issuer to settle in either cash or shares of common stock must be further evaluated to determine whether equity or temporary equity classification on the balance sheet is appropriate. Since the common units contain such a provision, we evaluated the accounting guidance and determined that the common units qualify for equity presentation in the Company’s consolidated financial statements. Net income attributable to noncontrolling common units is allocated based on their relative ownership percentage of the Operating Partnership during the reported period. The noncontrolling interest ownership percentage is determined by dividing the number of noncontrolling common units by the total number of common units outstanding. The issuance or redemption of additional shares of common stock or common units results in changes to the noncontrolling interest percentage as well as the total net assets of the Company. As a result, all equity transactions result in an allocation between equity and the noncontrolling interest in the Company’s consolidated balance sheets and statements of equity to account for the changes in the noncontrolling interest ownership percentage as well as the change in total net assets of the Company.

Noncontrolling Interests in Consolidated Property Partnerships

Noncontrolling interests in consolidated property partnerships represent the equity interests held by unrelated third parties in our three consolidated property partnerships (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” and see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”). Noncontrolling interests in consolidated property partnerships are not redeemable and are presented as permanent equity in the Company's consolidated balance sheets. We account for the noncontrolling interests in consolidated property partnerships using the hypothetical liquidation at book value (“HLBV”) method to attribute the earnings or losses of the consolidated property partnerships between the controlling and noncontrolling interests. Under the HLBV method, the amounts reported as noncontrolling interests in consolidated property partnerships in the consolidated balance sheets represent the amounts the noncontrolling interests would hypothetically receive at each balance sheet reporting date under the liquidation provisions of the governing agreements assuming the net assets of the consolidated property partnerships were liquidated at recorded amounts and distributed between the controlling and noncontrolling interests in accordance with the governing documents. The net income attributable to noncontrolling interests in consolidated property partnerships in the consolidated statements of operations is associated with the increase or decrease in the noncontrolling interest holders’ contractual claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the end of that reporting period when compared with their claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the beginning of that reporting period, after removing any contributions or distributions.

Common Partnership Interests on the Operating Partnership’s Consolidated Balance Sheets

The common units held by the Company and the noncontrolling common units held by the common limited partners are both presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets in partners’ capital. The redemption rights of the noncontrolling common units permit us to settle the redemption obligation in either cash or shares of the Company’s common stock at our option (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” for additional information).

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Noncontrolling interests in the Operating Partnership’s consolidated financial statements include the noncontrolling interest in property partnerships (see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”) and the Company’s 1.0% general partnership interest in the Finance Partnership. The 1.0% general partnership interest in the Finance Partnership noncontrolling interest is presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets given that these interests are not convertible or redeemable into any other ownership interest of the Company or the Operating Partnership.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Equity Offerings

Underwriting commissions and offering costs incurred in connection with common equity offerings and our at-the-market stock offering program (see Note 13 “Stockholders’ Equity of the Company”) are reflected as a reduction of additional paid-in capital. Issuance costs incurred in connection with preferred equity offerings are reflected as a reduction of the carrying value of the preferred equity.

Sales of our common stock under forward equity sale agreements (such as those under the forward equity offering executed in August 2018 and those under the 2018 At-The-Market Program, as discussed in Note 13 “Stockholders’ Equity of the Company”) meet the derivatives and hedging guidance scope exception to be accounted for as equity instruments based on the following assessment: (i) none of the agreements’ exercise contingencies were based on observable markets or indices besides those related to the market for our own stock price and operations; and (ii) none of the settlement provisions precluded the agreements from being indexed to our own stock.

The net proceeds from any equity offering of the Company are generally contributed to the Operating Partnership in exchange for a number of common units equivalent to the number of shares of common stock issued and are reflected in the Operating Partnership’s consolidated financial statements as an increase in partners’ capital.

Share-based Incentive Compensation Accounting

Compensation cost for all share-based awards, including options, requires measurement at estimated fair value on the grant date. Compensation cost is recognized on a straight-line basis over the service vesting period, which represents the requisite service period. The grant date fair value of market measure-based share-based compensation plans are calculated using a Monte Carlo simulation pricing model. The grant date fair value of stock option grants is calculated using the Black-Scholes valuation model. Equity awards settled in cash are valued at the fair value of our common stock on the period end date through the settlement date. Equity awards settled in cash are remeasured at each reporting period and are recognized as a liability in the consolidated balance sheet during the vesting period until settlement. Forfeitures of all share-based awards are recognized when they occur.

For share-based awards in which the performance period precedes the grant date, we recognize compensation cost over the requisite service period, which includes both the performance and service vesting periods, using the accelerated attribution expense method. The requisite service period begins on the date the Executive Compensation Committee authorizes the award and adopts any relevant performance measures.

For share-based awards with performance-based measures, the total estimated compensation cost is based on our most recent estimate of the probable achievement of the pre-established specific corporate performance measures. These estimates are based on actual results and our latest internal forecasts for each performance measure. For share-based awards with market measures, the total estimated compensation cost is based on the fair value of the award at the grant date. For share-based awards with performance-based measures and market measures, the total estimated compensation cost is based on the fair value per share at the grant date multiplied by our most recent estimate of the number of shares to be earned based on actual results and the probable achievement of the pre-established corporate performance measures based on our latest internal forecasts.

In accordance with the provisions of our share-based incentive compensation plan, we accept the return of shares of Company common stock, at the current quoted market price, from employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

For share-based awards granted by the Company, the Operating Partnership issues a number of common units equal to the number of shares of common stock ultimately granted by the Company in respect of such awards.

Basic and Diluted Net Income Available to Common Stockholders per Share

Basic net income available to common stockholders per share is computed by dividing net income available to common stockholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of shares of common stock outstanding for the period. Diluted net income available to

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

common stockholders per share is computed by dividing net income available for common stockholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of shares of common stock outstanding for the period plus the assumed exercise of all dilutive securities. The impact of the outstanding common units is considered in the calculation of diluted net income available to common stockholders per share. The common units are not reflected in the diluted net income available to common stockholders per share calculation because the exchange of common units into common stock is on a one for one basis, and the common units are allocated net income on a per share basis equal to the common stock (see Note 21 “Net Income Available to Common Stockholders Per Share of the Company”). Accordingly, any exchange would not have any effect on diluted net income (loss) available to common stockholders per share.

Nonvested share-based payment awards (including nonvested restricted stock units (“RSUs”), vested market-measure RSUs and vested dividend equivalents issued to holders of RSUs) containing nonforfeitable rights to dividends or dividend equivalents are accounted for as participating securities and included in the computation of basic and diluted net income available to common stockholders per share pursuant to the two-class method. The dilutive effect of shares issuable under executed forward equity sale agreements and stock options are reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. The dilutive effect of the outstanding nonvested shares of common stock (“nonvested shares”) and RSUs that have not yet been granted but are contingently issuable under the share-based compensation programs is reflected in the weighted average diluted shares calculation by application of the treasury stock method at the beginning of the quarterly period in which all necessary conditions have been satisfied.

Basic and Diluted Net Income Available to Common Unitholders per Unit

Basic net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of vested common units outstanding for the period. Diluted net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of common units outstanding for the period plus the assumed exercise of all dilutive securities.

The dilutive effect of stock options, outstanding nonvested shares, RSUs, awards containing nonforfeitable rights to dividend equivalents and shares issuable under executed forward equity sale agreements are reflected in diluted net income available to common unitholders per unit in the same manner as noted above for net income available to common stockholders per share.

Fair Value Measurements

The fair values of our financial assets and liabilities are disclosed in Note 19, “Fair Value Measurements and Disclosures,” to our consolidated financial statements. The only financial assets recorded at fair value on a recurring basis in our consolidated financial statements are our marketable securities. We elected not to apply the fair value option for any of our eligible financial instruments or other items.

We determine the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy:

• Level 1 – quoted prices for identical instruments in active markets;

• Level 2 – quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and

• Level 3 – fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

We determine the fair value for the marketable securities using quoted prices in active markets for identical assets. Our other financial instruments, which are only disclosed at fair value, are comprised of secured debt, unsecured senior notes, unsecured line of credit and unsecured term loan facility.

We generally determine the fair value of our secured debt, unsecured debt, and unsecured line of credit by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market rate by obtaining period-end treasury rates for maturities that correspond to the maturities of our fixed-rate debt and then adding an appropriate credit spread based on information obtained from third-party financial institutions. These credit spreads take into account factors, including but not limited to, our credit profile, the tenure of the debt, amortization period, whether the debt is secured or unsecured, and the loan-to-value ratio of the debt to the collateral. These calculations are significantly affected by the assumptions used, including the discount rate, credit spreads and estimates of future cash flow. We calculate the market rate of our unsecured line of credit, unsecured term loan facility, and unsecured term loan by obtaining the period-end London Interbank Offered Rate (“LIBOR”) and then adding an appropriate credit spread based on our credit ratings, and the amended terms of our unsecured line of credit, unsecured term loan facility, and unsecured term loan agreement. We determine the fair value of each of our publicly traded unsecured senior notes based on their quoted trading price at the end of the reporting period, if such prices are available.

Carrying amounts of our cash and cash equivalents, restricted cash and accounts payable approximate fair value due to their short-term maturities.

Income Taxes

We have elected to be taxed as a REIT under Sections 856 through 860 of the Code. To qualify as a REIT, we must distribute annually at least 90% of our adjusted taxable income, as defined in the Code, to our stockholders and satisfy certain other organizational and operating requirements. We generally will not be subject to federal income taxes if we distribute 100% of our taxable income for each year to our stockholders. If we fail to qualify as a REIT in any taxable year, we will be subject to federal income taxes (including any applicable alternative minimum tax) on our taxable income at regular corporate rates and we may not be able to qualify as a REIT for four subsequent taxable years. Even if we qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property and to federal income taxes and excise taxes on our undistributed taxable income. We believe that we have met all of the REIT distribution and technical requirements for the years ended December 31, 2019, 2018 and 2017, and we were not subject to any federal income taxes (see Note 25 “Tax Treatment of Distributions” for additional information). We intend to continue to adhere to these requirements and maintain the Company’s REIT status. Accordingly, no provision for income taxes has been made in the accompanying financial statements.

In addition, any taxable income from our taxable REIT subsidiaries, which were formed in 2002, 2018 and 2019, are subject to federal, state, and local income taxes. For the years ended December 31, 2019, 2018 and 2017 the taxable REIT subsidiaries had de minimis taxable income.

Uncertain Tax Positions

We include favorable tax positions in the calculation of tax liabilities if it is more likely than not that our adopted tax position will prevail if challenged by tax authorities.

We evaluated the potential impact of identified uncertain tax positions for all tax years still subject to audit under state and federal income tax law and concluded that we did not have any unrecognized tax benefits or any additional tax liabilities as of December 31, 2019 or 2018. As of December 31, 2019, the years still subject to audit are 2015 through 2019 under the California state income tax law and 2016 through 2019 under the federal income tax law.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Segments

We currently operate in one operating segment, our office properties segment.

Concentration of Credit Risk

All of our properties and development and redevelopment projects are owned and all of our business is currently conducted in the state of California with the exception of the ownership and operation of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. The ability of tenants to honor the terms of their leases is dependent upon the economic, regulatory, and social factors affecting the communities in which our tenants operate.

We have deposited cash with financial institutions that is insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000 per institution. As of December 31, 2019 and 2018, we had cash accounts in excess of FDIC insured limits.

Accounting Standards Issued But Not Yet Effective at December 31, 2019

Accounting Pronouncements Adopted January 1, 2020

ASU No. 2016-13 “Financial Instruments - Credit Losses (Topic 326)”

On June 16, 2016, the FASB issued ASU No. 2016-13 (“ASU 2016-13”) to amend the accounting for credit losses for certain financial instruments. Under the new guidance, an entity recognizes its estimate of expected credit losses as an allowance, which the FASB believes will result in more timely recognition of such losses.  In November 2018, the FASB released ASU No. 2018-19 “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.” This ASU clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 “Financial Instruments – Credit Losses.” Instead, impairment of receivables arising from operating leases should be accounted for under Subtopic 842-30 “Leases – Lessor.” ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

ASU No. 2018-13 “Fair Value Measurement (Topic 820)”

On August 28, 2018, the FASB issued ASU No. 2018-13 (“ASU 2018-13”) to amend the disclosure requirements for fair value measurements. The amendments in ASU 2018-13 include new, modified and eliminated disclosure requirements and are the result of a broader disclosure project called FASB Concepts Statement, Conceptual Framework for Financial Reporting - Chapter 8: Notes to Financial Statements, which the Board finalized on August 28, 2018. The Board used the guidance in the Concepts Statement to improve the effectiveness of ASC 820’s disclosure requirements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for any eliminated or modified disclosures. The adoption did not have a material impact on the disclosures in the notes to the consolidated financial statements.

ASU No. 2018-15 “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)”

On August 29, 2018, the FASB issued ASU No. 2018-15 (“ASU 2018-15”) to amend a customer’s accounting for implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. ASU 2018-15 can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

3. Acquisitions

Operating Property Acquisitions

During the year ended December 31, 2019, we acquired the 19-building creative office campus listed below in one transaction from an unrelated third party. During the year ended December 31, 2018, we acquired the four operating properties listed below in two transactions from unrelated third parties.

Property	Date of Acquisition	Number of Buildings	Rentable Square Feet (unaudited)	Occupancy as of December 31, 2019 (unaudited)		Purchase Price (in millions) (1)
2019 Acquisitions
3101-3243 La Cienega Boulevard, Culver City, CA (2)	October 15, 2019	19	151,908	100.0	%	$	186.0
2018 Acquisitions
345, 347 & 349 Oyster Point Boulevard, South San Francisco, CA	January 31, 2018	3	145,530	100.0	%	$	111.0
345 Brannan Street, San Francisco, CA (3)	December 21, 2018	1	110,050	99.7	%	146.0
Total (4)		4	255,580			$	257.0

________________________ 

(1) Excludes acquisition-related costs.

(2) The results of operations for the properties acquired during 2019 contributed $3.7 million to revenue and a net loss of $0.1 million primarily due to a write-off of lease-related intangible assets as a result of an early lease termination.

(3) At December 31, 2018, this property was temporarily being held in a separate VIE to facilitate potential Section 1031 Exchanges. During January 2019, the Company completed the Section 1031 Exchange related to this VIE.

(4) The results of operations for the properties acquired during 2018 contributed $8.0 million and $1.7 million to revenue and net income, respectively, for the year ended December 31, 2018.

The related assets, liabilities and results of operations of the acquired properties are included in the consolidated financial statements as of the date of acquisition. The following table summarizes the estimated fair values of the assets and liabilities assumed at the respective acquisition dates for our 2019 and 2018 operating property acquisitions, respectively:

	Total 2019 Operating Property Acquisitions (1)		Total 2018 Operating Property Acquisitions (2)
Assets
Land and improvements	$	150,561	$	80,269
Buildings and improvements (3)	30,932		172,059
Deferred leasing costs and acquisition-related intangible assets (4)	12,063		13,593
Right of use ground lease asset (5)	13,334		—
Total assets acquired	$	206,890	$	265,921
Liabilities
Acquisition-related intangible liabilities (6)	$	9,950	$	8,921
Ground lease liability (5)	10,940		—
Total liabilities assumed	$	20,890	$	8,921
Net assets and liabilities acquired	$	186,000	$	257,000

________________________ 

(1) The purchase price of the acquisition completed during the year ended December 31, 2019 was less than 10% of the Company’s total assets as of December 31, 2018.

(2) The purchase price of the two acquisitions completed during the year ended December 31, 2018 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2017.

(3) Represents buildings, building improvements and tenant improvements.

(4) For the 2019 operating property acquisition, represents in-place leases (approximately $9.2 million with a weighted average amortization period of 3.3 years) and leasing commissions (approximately $2.9 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents in-place leases (approximately $11.8 million with a weighted average amortization period of 1.3 years) and leasing commissions (approximately $1.8 million with a weighted average amortization period of 6.6 years).

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(5) We evaluated the ground lease assumed in connection with the 2019 operating property acquisition and concluded it met the criteria to be classified as an operating lease. The discount rate used in determining the present value of the minimum future lease payments was 4.79%. The right of use asset ground lease asset is equal to the ground lease liability adjusted for above and below market intangibles and deferred leasing costs. Refer to Note 18 “Commitments and Contingencies” for further discussion of the Company's ground lease obligations.

(6) For the 2019 operating property acquisition, represents below-market leases (approximately $10.0 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents below-market leases (approximately $8.9 million with a weighted average amortization period of 9.8 years).

Development Project Acquisitions

During the year ended December 31, 2019, we acquired the following development sites in two transactions from unrelated third parties. The acquisitions were funded from various sources of liquidity including proceeds from the Company’s unsecured revolving credit facility, the issuance of debt and the settlement of the Company’s 2018 forward equity sales agreements. During the year ended December 31, 2018, we acquired a development site adjacent to the three operating properties we acquired in January 2018, from an unrelated third party. The acquisition was funded with proceeds from the Company’s unsecured revolving credit facility and the Company’s at-the-market stock offering program.

Project	Date of Acquisition	City/Submarket	Purchase Price (in millions)
2019 Acquisitions
1335 Broadway & 901 Park Boulevard, San Diego, CA (1)	August 19, 2019	East Village	$	40.0
Seattle CBD Project (2)	December 12, 2019	Seattle CBD	133.0
Total 2019 Acquisitions			$	173.0
2018 Acquisitions
Kilroy Oyster Point (3)	June 1, 2018	South San Francisco	$	308.2
Total 2018 Acquisitions			$	308.2

________________________ 

(1) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $4.0 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

(2) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $6.3 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets. In addition, as of December 31, 2019, the Company had $10.0 million in restricted cash, which is excluded from the purchase price above, related to this acquisition which may be payable to the seller only if certain events occur within three years following the date of acquisition.

(3) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $40.6 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2018, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

In addition to the acquisitions listed above, during 2019, we acquired an additional land parcel for an existing development project for $99.5 million.

Acquisition Costs

During the years ended December 31, 2019, 2018, and 2017, we capitalized $1.6 million, $3.8 million, and $4.6 million, respectively, of acquisition costs.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

4.        Dispositions

Operating Property Dispositions

The following table summarizes the operating properties sold during the years ended December 31, 2019, 2018 and 2017:

Location	Month of Disposition	Number of Buildings	Rentable Square Feet (unaudited)	Sales Price (in millions) (1)
2019 Dispositions
2829 Townsgate Road, Thousand Oaks, CA	May	1	84,098	$	18.3
2211 Michelson Drive, Irvine, CA	October	1	271,556	115.5
Total 2019 Dispositions		2	355,654	$	133.8
2018 Dispositions
1310-1327 Chesapeake Terrace, Sunnyvale, CA	November	4	266,982	$	160.3
Plaza Yarrow Bay Properties (2)	November	4	279,924	134.5
23925, 23975, & 24025 Park Sorrento, Calabasas, CA	December	3	225,340	78.2
Total 2018 Dispositions		11	772,246	$	373.0
2017 Dispositions
5717 Pacific Center Boulevard, San Diego, CA	January	1	67,995	$	12.1
Sorrento Mesa and Mission Valley Properties (3)	September	10	675,143	174.5
Total 2017 Dispositions		11	743,138	$	186.6

__________________

(1) Represents gross sales price before broker commissions and closing costs.

(2) The Plaza Yarrow Bay Properties include the following properties: 10210, 10220 and 10230 NE Points Drive & 3933 Lake Washington Boulevard NE in Kirkland, Washington.

(3) The Sorrento Mesa and Mission Valley Properties includes the following properties: 10390, 10394, 10398, 10421, 10445 and 10455 Pacific Center Court, 2355, 2365, 2375 and 2385 Northside Drive and Pacific Corporate Center - Lot 8, a 5.0 acre undeveloped land parcel.

The total gains on the sales of the operating properties sold during the years ended December 31, 2019, 2018 and 2017 were $36.8 million, $142.9 million and $39.5 million, respectively.

Land Dispositions

We did not dispose of any land parcels during the year ended December 31, 2019. During the year ended December 31, 2018, in connection with the Plaza Yarrow Bay Properties disposition listed above, we recognized a gain on sale of land of $11.8 million. During the year ended December 31, 2017, in connection with the Sorrento Mesa and Mission Valley Properties disposition listed above, we recognized a gain on sale of land of $0.4 million.

Restricted Cash Related to Dispositions

We did not have any restricted cash related to dispositions or Section 1031 Exchanges as of December 31, 2019. As of December 31, 2018, approximately $113.1 million of net proceeds related to the operating property dispositions during the year ended December 31, 2018 were temporarily being held at a qualified intermediary at our direction, for the purpose of facilitating a Section 1031 Exchange. The cash proceeds were included in restricted cash on our consolidated balance sheets at December 31, 2018. During January 2019, the Section 1031 Exchange related to this VIE was successfully completed and the cash proceeds were released from the qualified intermediary.

F - 30

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

5. Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net:
Deferred leasing costs	$	286,026		$	266,905
Accumulated amortization	(100,145		)	(100,805		)
Deferred leasing costs, net	185,881			166,100
Above-market operating leases	611			2,836
Accumulated amortization	(116		)	(2,150		)
Above-market operating leases, net	495			686
In-place leases	58,076			66,526
Accumulated amortization	(31,647		)	(36,174		)
In-place leases, net	26,429			30,352
Below-market ground lease obligation	—			490
Accumulated amortization	—			(54		)
Below-market ground lease obligation, net (1)	—			436
Total deferred leasing costs and acquisition-related intangible assets, net	$	212,805		$	197,574
Acquisition-related Intangible Liabilities, net: (2)
Below-market operating leases	$	51,263		$	53,523
Accumulated amortization	(27,171		)	(29,978		)
Below-market operating leases, net	24,092			23,545
Above-market ground lease obligation	—			6,320
Accumulated amortization	—			(727		)
Above-market ground lease obligation, net (1)	—			5,593
Total acquisition-related intangible liabilities, net	$	24,092		$	29,138

_______________

(1) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Such amounts are reflected in the net book value of the right of use ground lease asset on our consolidated balance sheets. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(2) Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

F - 31

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles for the years ended December 31, 2019, 2018 and 2017.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Deferred leasing costs (1)	$	35,779		$	34,341		$	31,675
Above-market operating leases (2)	192			444			2,240
In-place leases (1)	18,615			15,915			18,650
Below-market ground lease obligation (3)	—			8			8
Below-market operating leases (4)	(9,398		)	(10,192		)	(10,768		)
Above-market ground lease obligation (3)	—			(101		)	(101		)
Total	$	45,188		$	40,415		$	41,704

_______________

(1) The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense and the amortization of lease incentives is recorded as a reduction to rental income in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(4) The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of December 31, 2019 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Operating Leases (2)
	(in thousands)
2020	30,897		38		11,379		(7,258		)
2021	27,043		38		6,668		(4,543		)
2022	23,642		38		4,001		(3,553		)
2023	19,904		38		1,641		(1,866		)
2024	16,976		38		602		(1,090		)
Thereafter	67,419		305		2,138		(5,782		)
Total	$	185,881	$	495	$	26,429	$	(24,092	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2) Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

F - 32

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

6. Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Current receivables	$	27,660		$	24,815
Allowance for uncollectible tenant receivables (1)	(1,171		)	(4,639		)
Current receivables, net	$	26,489		$	20,176

_______________

(1) Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for uncollectible tenant receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for uncollectible tenant receivables.

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred rent receivables	$	339,489		$	270,346
Allowance for deferred rent receivables (1)	(1,552		)	(3,339		)
Deferred rent receivables, net	$	337,937		$	267,007

_______________

(1) Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for deferred rent receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for deferred rent receivables.

7. Prepaid Expenses and Other Assets, Net

Prepaid expenses and other assets, net consisted of the following at December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Furniture, fixtures and other long-lived assets, net	$	35,286	$	36,833
Notes receivable (1)	1,651		2,113
Prepaid expenses	18,724		13,927
Total prepaid expenses and other assets, net	$	55,661	$	52,873

_______________

(1) Notes receivable are shown net of a valuation allowance of approximately $3.6 million and $2.9 million as of December 31, 2019 and 2018, respectively.

F - 33

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

8.    Secured and Unsecured Debt of the Company

In this Note 8, the “Company” refers solely to Kilroy Realty Corporation and not to any of our subsidiaries. The Company itself does not hold any indebtedness. All of our secured and unsecured debt is held directly by the Operating Partnership.

The Company generally guarantees all the Operating Partnership’s unsecured debt obligations including the unsecured revolving credit facility, the $150.0 million unsecured term loan facility and all of the unsecured senior notes. At December 31, 2019 and 2018, the Operating Partnership had $3.3 billion and $2.6 billion, respectively, outstanding in total, including unamortized discounts and deferred financing costs, under these unsecured debt obligations.

In addition, although the remaining $0.3 billion of the Operating Partnership’s debt as of December 31, 2019 and 2018, is secured and non-recourse to the Company, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

Debt Covenants and Restrictions

One of the covenants contained within the unsecured revolving credit facility and the unsecured term loan facility as discussed further below in Note 9 prohibits the Company from paying dividends during an event of default in excess of an amount which results in distributions to us in an amount sufficient to permit us to pay dividends to our stockholders that we reasonably believe are necessary to (a) maintain our qualification as a REIT for federal and state income tax purposes and (b) avoid the payment of federal or state income or excise tax.

9.    Secured and Unsecured Debt of the Operating Partnership

Secured Debt

The following table sets forth the composition of our secured debt as of December 31, 2019 and 2018:

	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	December 31,
Type of Debt				2019			2018
				(in thousands)
Mortgage note payable	3.57%	3.57%	December 2026	$	170,000		$	170,000
Mortgage note payable (3)	4.48%	4.48%	July 2027	89,502			91,332
Mortgage note payable (3)(4)	6.05%	3.50%	June 2019	—			75,238
Total secured debt				$	259,502		$	336,570
Unamortized Deferred Financing Costs				(909		)	(1,039		)
Total secured debt, net				$	258,593		$	335,531

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) Represents the effective interest rate including the amortization of initial issuance discounts/premiums excluding the amortization of deferred financing costs.

(3) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

(4) In February 2019, the Company repaid this mortgage note payable at par.

The Operating Partnership’s secured debt was collateralized by operating properties with a combined net book value of approximately $251.2 million as of December 31, 2019.

Although our mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

As of December 31, 2019, all of the Operating Partnership’s secured loans contained restrictions that would require the payment of prepayment penalties for the acceleration of outstanding debt. The mortgage notes payable are secured

F - 34

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

by deeds of trust on certain of our properties and the assignment of certain rents and leases associated with those properties.

Unsecured Senior Notes

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership and outstanding, including unamortized discounts of $6.5 million and $6.6 million and unamortized deferred financing costs of $18.7 million and $15.4 million as of December 31, 2019 and 2018, respectively:

					Net Carrying Amount as of December 31,
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	2019			2018
					(in thousands)
3.050% Unsecured Senior Notes (2)	September 2019	February 2030	3.050%	3.064%	$	500,000		$	—
Unamortized discount and deferred financing costs					(5,998		)	—
Net carrying amount					$	494,002		$	—
4.750% Unsecured Senior Notes (3)	November 2018	December 2028	4.750%	4.800%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(4,446		)	(4,960		)
Net carrying amount					$	395,554		$	395,040
4.350% Unsecured Senior Notes (4)	October 2018	October 2026	4.350%	4.350%	$	200,000		$	200,000
Unamortized discount and deferred financing costs					(1,186		)	(1,375		)
Net carrying amount					$	198,814		$	198,625
4.300% Unsecured Senior Notes (4)	July 2018	July 2026	4.300%	4.300%	$	50,000		$	50,000
Unamortized discount and deferred financing costs					(290		)	(342		)
Net carrying amount					$	49,710		$	49,658
3.450% Unsecured Senior Notes (5)	December 2017	December 2024	3.450%	3.470%	$	425,000		$	425,000
Unamortized discount and deferred financing costs					(2,907		)	(3,493		)
Net carrying amount					$	422,093		$	421,507
3.450% Unsecured Senior Notes (6)	February 2017	February 2029	3.450%	3.450%	$	75,000		$	75,000
Unamortized discount and deferred financing costs					(390		)	(432		)
Net carrying amount					$	74,610		$	74,568
3.350% Unsecured Senior Notes (6)	February 2017	February 2027	3.350%	3.350%	$	175,000		$	175,000
Unamortized discount and deferred financing costs					(825		)	(941		)
Net carrying amount					$	174,175		$	174,059
4.375% Unsecured Senior Notes (7)	September 2015	October 2025	4.375%	4.444%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(3,185		)	(3,738		)
Net carrying amount					$	396,815		$	396,262
4.250% Unsecured Senior Notes (8)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(5,100		)	(5,632		)
Net carrying amount					$	394,900		$	394,368
3.800% Unsecured Senior Notes (9)	January 2013	January 2023	3.800%	3.800%	$	300,000		$	300,000
Unamortized discount and deferred financing costs					(834		)	(1,108		)
Net carrying amount					$	299,166		$	298,892
Total Unsecured Senior Notes, Net					$	2,899,839		$	2,402,979

________________________

(1) Represents the effective interest rate including the amortization of initial issuance discounts, excluding the amortization of deferred financing costs.

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year, beginning on February 15, 2020.

(3) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on April 18th and October 18th of each year.

(5) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(6) Interest on these notes is payable semi-annually in arrears on February 17th and August 17th of each year.

(7) Interest on these notes is payable semi-annually in arrears on April 1st and October 1st of each year.

(8) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(9) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

F - 35

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Unsecured Senior Notes - Registered Offerings

In September 2019, the Operating Partnership issued $500.0 million of aggregate principal amount of unsecured senior notes in a registered public offering. The outstanding balance of the unsecured senior notes is included in unsecured debt, net of an initial issuance discount of $0.6 million, on our consolidated balance sheets. The unsecured senior notes, which are scheduled to mature on February 15, 2030, require semi-annual interest payments each February and August based on a stated annual interest rate of 3.050%. The Operating Partnership may redeem the notes at any time prior to February 15, 2030, either in whole or in part, subject to the payment of an early redemption premium prior to a par call option period commencing three months prior to maturity.

In November 2018, the Operating Partnership issued $400.0 million of aggregate principal amount of unsecured senior notes in a registered public offering. The outstanding balance of the unsecured senior notes is included in unsecured debt, net of initial issuance discount of $1.5 million, on our consolidated balance sheets. The unsecured senior notes, which are scheduled to mature on December 15, 2028, require semi-annual interest payments each June and December based on a stated annual interest rate of 4.750%. The Operating Partnership may redeem the notes at any time prior to December 15, 2028, either in whole or in part, subject to the payment of an early redemption premium subject to a par call option.

In December 2018, we used a portion of the net proceeds from the issuance of our $400.0 million, 4.750% unsecured senior notes to early redeem, at our option, the $250.0 million aggregate principal amount of our outstanding 6.625% unsecured senior notes that were scheduled to mature on June 1, 2020. In connection with our early redemption, we incurred a $12.6 million loss on early extinguishment of debt comprised of an $11.8 million premium paid to the note holders at the redemption date and a $0.8 million write-off of the unamortized discount and unamortized deferred financing costs.

Unsecured Senior Notes - Private Placement

In May 2018, the Operating Partnership entered into a note purchase agreement in a private placement (the “2018 Note Purchase Agreement”) in connection with the issuance and sale of $50.0 million principal amount of the Operating Partnership’s 4.30% Senior Notes, Series A, due July 18, 2026 (the “Series A Notes due 2026”), and $200.0 million principal amount of the Operating Partnership’s 4.35% Senior Notes, Series B, due October 18, 2026 (the “Series B Notes due 2026” and, together with the Series A Notes, the “Series A and B Notes due 2026”), as shown in the table above. The Company drew the full amount of the Series A Notes due 2026 on July 18, 2018. On October 22, 2018, the Company drew the full amount of the Series B Notes due 2026. The Series A and B Notes due 2026 mature on their respective due dates, unless earlier redeemed or prepaid pursuant to the terms of the 2018 Note Purchase Agreement. Interest on the Series A and B Notes due 2026 is payable semi-annually in arrears on April 18 and October 18 of each year beginning April 18, 2019. As of December 31, 2019, there was $50.0 million and $200.0 million issued and outstanding aggregate principal amount of Series A and Series B Notes due 2026, respectively.

The Operating Partnership may, at its option and upon notice to the purchasers of the Series A and B Notes due 2026, prepay at any time all, or from time to time any part of the principal amounts then outstanding (in an amount not less than 5% of the aggregate principal amount of the Series A and B Notes due 2026 then outstanding in the case of a partial prepayment), at 100% of the principal amount so prepaid, plus the make-whole amount determined for the prepayment date with respect to such principal amount as set forth in the 2018 Note Purchase Agreement.

In connection with the issuance of the Series A and B Notes due 2026, the Company entered into an agreement whereby it will guarantee the payment by the Operating Partnership of all amounts due with respect to the Series A and B Notes due 2026 and the performance by the Operating Partnership of its obligations under the 2018 Note Purchase Agreement.

Unsecured Revolving Credit Facility and Term Loan Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of December 31, 2019 and 2018:

F - 36

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	245,000		$	45,000
Remaining borrowing capacity	505,000			705,000
Total borrowing capacity (1)	$	750,000		$	750,000
Interest rate (2)	2.76		%	3.48		%
Facility fee-annual rate (3)	0.200%
Maturity date	July 2022

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $600.0 million under an accordion feature under the terms of the unsecured revolving credit facility and unsecured term loan facility.

(2) Our unsecured revolving credit facility interest rate was calculated based on the contractual rate of LIBOR plus 1.000% as of December 31, 2019 and 2018.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of December 31, 2019 and 2018, $3.4 million and $4.7 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility.

The Company intends to borrow under the unsecured revolving credit facility from time to time for general corporate purposes, to finance development and redevelopment expenditures, to fund potential acquisitions and to potentially repay long-term debt.

During the first quarter of 2018, we borrowed the full $150.0 million borrowing capacity of our unsecured term loan facility. In connection with the funding of the outstanding borrowings, we transferred $30.0 million of outstanding borrowings under the unsecured revolving credit facility to the balance of our unsecured term loan facility. As a result, only $120.0 million of cash proceeds were received from the funding of the unsecured term loan facility. The following table summarizes the balance and terms of our unsecured term loan facility as of December 31, 2019 and 2018, which is included in unsecured debt, net on our consolidated balance sheets:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Remaining borrowing capacity	—			—
Total borrowing capacity (1)	$	150,000		$	150,000
Interest rate (2)	2.85		%	3.49		%
Undrawn facility fee-annual rate	0.200%
Maturity date	July 2022

_______________

(1) As of December 31, 2019 and 2018, $0.7 million and $0.9 million of unamortized deferred financing costs, respectively, remained to be amortized through the maturity date of our unsecured term loan facility.

(2) Our unsecured term loan facility interest rate was calculated based on the contractual rate of LIBOR plus 1.100% as of December 31, 2019 and 2018.

Debt Covenants and Restrictions

The unsecured revolving credit facility, the unsecured term loan facility, the unsecured senior notes, the Series A and B Notes due 2026 and Series A and B Notes due 2027 and 2029 and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of December 31, 2019 and 2018.

F - 37

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments as of December 31, 2019:

Year	(in thousands)
2020	$	5,137
2021	5,342
2022	400,554
2023	305,775
2024	431,006
Thereafter	2,431,688
Total aggregate principal value (1)	$	3,579,502

________________________ 

(1) Includes gross principal balance of outstanding debt before the effect of the following at December 31, 2019: $20.3 million of unamortized deferred financing costs for the unsecured term loan facility, unsecured senior notes and secured debt and $6.5 million of unamortized discounts for the unsecured senior notes.

Capitalized Interest and Loan Fees

The following table sets forth gross interest expense, including debt discount/premium and deferred financing cost amortization, net of capitalized interest, for the years ended 2019, 2018 and 2017. The interest expense capitalized was recorded as a cost of development and increased the carrying value of undeveloped land and construction in progress.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Gross interest expense	$	129,778		$	117,789		$	112,577
Capitalized interest and deferred financing costs	(81,241		)	(68,068		)	(46,537		)
Interest expense	$	48,537		$	49,721		$	66,040

F - 38

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

10. Deferred Revenue and Acquisition-Related Intangible Liabilities, net

Deferred revenue and acquisition-related intangible liabilities, net consisted of the following at December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Deferred revenue related to tenant-funded tenant improvements	$	96,271	$	104,558
Other deferred revenue	19,125		15,950
Acquisition-related intangible liabilities, net (1)	24,092		29,138
Total	$	139,488	$149,646

________________________

(1) See Note 5 “Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net” for additional information regarding our acquisition-related intangible liabilities.

Deferred Revenue Related to Tenant-funded Tenant Improvements

During the years ended December 31, 2019, 2018, and 2017, $19.2 million, $18.4 million and $16.8 million, respectively, of deferred revenue related to tenant-funded tenant improvements was amortized and recognized as rental income. The following is the estimated amortization of deferred revenue related to tenant-funded tenant improvements as of December 31, 2019 for the next five years and thereafter:

Year Ending	(in thousands)
2020	$	16,935
2021	15,426
2022	14,320
2023	12,553
2024	10,318
Thereafter	26,719
Total	$	96,271

F - 39

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

11.    Noncontrolling Interests on the Company’s Consolidated Financial Statements

Common Units of the Operating Partnership

The Company owned a 98.1% and 98.0% common general partnership interest in the Operating Partnership as of December 31, 2019 and 2018, respectively. The remaining 1.9% and 2.0% common limited partnership interest as of December 31, 2019 and 2018, respectively, was owned by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 2,023,287 and 2,025,287 common units outstanding held by these investors, executive officers and directors as of December 31, 2019 and 2018, respectively. The decrease in the common units from December 31, 2018 to December 31, 2019 was attributable to 2,000 common unit redemptions.

The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $167.7 million and $126.4 million as of December 31, 2019 and 2018, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

Noncontrolling Interest in Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with Norges Bank Real Estate Management (“NBREM”) whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. The transactions did not meet the criteria to qualify as sales of real estate because the Company continues to effectively control the properties and therefore continued to account for the 100 First Street and 303 Second Street office properties on a consolidated basis in its financial statements. At formation, the Company accounted for the transactions as equity transactions and recognized noncontrolling interests in its consolidated balance sheets.

The noncontrolling interests in 100 First LLC and 303 Second LLC as of December 31, 2019 and 2018 were $189.6 million and $186.4 million, respectively. The remaining amount of noncontrolling interests in consolidated property partnerships represents the third party equity interest in Redwood LLC. This noncontrolling interest was $5.8 million and $6.0 million as of December 31, 2019 and 2018, respectively.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

12.    Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with NBREM whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. Refer to Note 11 for additional information regarding these consolidated property partnerships.

13. Stockholders’ Equity of the Company

Common Stock

2018 Common Stock Forward Equity Sale Agreements

In August 2018, the Company entered into forward equity sale agreements with certain financial institutions acting as forward purchasers in connection with an offering of 5,000,000 shares of common stock at an initial gross offering price of $360.5 million, or $72.10 per share, before underwriting discounts, commissions and offering expenses. The forward purchasers borrowed and sold an aggregate of 5,000,000 shares of common stock in the offering. The Company did not receive any proceeds from the sale of its shares of common stock by the forward purchasers at the time of the offering.

In July 2019, the Company physically settled these forward equity sale agreements. Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million and contributed the net proceeds to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

At-The-Market Stock Offering Programs

Under our at-the-market stock offering programs, which commenced in December 2014 and June 2018, we may offer and sell shares of our common stock from time to time in “at-the-market” offerings. During the year ended December 31, 2018, the Company completed its existing at-the-market stock offering program (the “2014 At-The-Market Program”) under which we sold an aggregate of $300.0 million in gross sales of shares. In June 2018, the Company commenced a new at-the-market stock offering program (the “2018 At-The-Market Program”) under which we may offer and sell shares of our common stock with an aggregate gross sales price of up to $500.0 million. In connection with the 2018 At-The-Market Program, the Company may also, at its discretion, enter into forward equity sale agreements. The use of forward equity sale agreements would allow the Company to lock in a share price on the sale of shares of our common stock at the time an agreement is executed, but defer receiving the proceeds from the sale of shares until a later date.

During the year ended December 31, 2019, we executed various 12-month forward equity sale agreements under the 2018 Program with financial institutions acting as forward purchasers to sell 3,147,110 shares of common stock at a weighted average sales price of $80.08 per share before underwriting discounts, commissions and offering expenses. The Company did not directly sell any shares of our common stock under the 2018 At-The-Market Program during the year and did not receive any proceeds from the sale of its shares of common stock by the forward purchasers. The Company currently expects to fully physically settle the forward equity sale agreements and receive cash proceeds upon one or more settlement dates, at the Company’s discretion, prior to the final settlement dates in the first quarter of 2020 through the first quarter of 2021, at which time we expect to receive aggregate net cash proceeds at settlement equal to the number of shares specified in such forward equity sale agreement multiplied by the relevant forward price per share. The weighted average forward sale price that we expect to receive upon physical settlement of the agreements will be subject to adjustment for (i) a floating interest rate factor equal to a specified daily rate less a spread, (ii) the forward purchasers’ stock borrowing costs and (iii) scheduled dividends during the term of the agreements. We have not settled any portion of these forward equity sale agreements as of the date of this filing. Upon physical settlement, the Company will contribute the net proceeds from the issuance of shares of our common stock to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

During the year ended December 31, 2018, we sold 447,466 shares of common stock under the 2018 At-The-Market Program and 1,369,729 shares of common stock under the 2014 At-The-Market Program.

Since commencement of the 2018 At-The-Market Program through December 31, 2019, we have directly sold 447,466 shares of common stock, and an additional 3,147,110 shares have been sold by forward purchasers under forward equity sale agreements, which have not been settled as of the date of this filing. As of December 31, 2019, approximately $214.2 million remains available to be sold under this program. Actual future sales will depend upon a variety of factors, including, but not limited to, market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

The following table sets forth information regarding direct sales of our common stock under our at-the-market offering programs for the years ended December 31, 2018 and 2017:

	Year Ended December 31,
	2018		2017
	(in millions, except share data)
Shares of common stock sold during the period	1,817,195		235,077
Weighted average price per share of common stock	$	73.64	$	75.40
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

The proceeds from sales were used to fund acquisitions, development expenditures and general corporate purposes including repayment of borrowings under the unsecured revolving credit facility.

Common Stock Repurchases

An aggregate of 4,935,826 shares currently remain eligible for repurchase under a share repurchase program approved by the Company’s board of directors in 2016. The Company did not repurchase shares of common stock under this program during the three years ended December 31, 2019, 2018 and 2017.

Accrued Dividends and Distributions

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock and noncontrolling units as of December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	51,418	$	45,840
Noncontrolling common unitholders of the Operating Partnership	981		922
RSU holders (1)	820		797
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	$	53,219	$	47,559

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

	December 31,
	2019	2018
Outstanding Shares and Units:
Common stock (1)	106,016,287	100,746,988
Noncontrolling common units	2,023,287	2,025,287
RSUs (2)	1,651,905	1,711,628

______________________

(1) The amount includes nonvested shares.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(2) The amount includes nonvested RSUs. Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

Preferred Stock

On August 15, 2017, the Company redeemed all 4,000,000 shares of its 6.375% Series H Cumulative Redeemable Preferred Stock (“Series H Preferred Stock”). The shares of Series H Preferred Stock were redeemed at a redemption price equal to their stated liquidation preference of $25.00 per share, representing $100.0 million in aggregate. The redemption payment did not include any additional accrued dividends because the redemption date was also the dividend payment date.

On March 30, 2017 (the “Series G Redemption Date”), the Company redeemed all 4,000,000 shares of its 6.875% Series G Cumulative Redeemable Preferred Stock (“Series G Preferred Stock”). The shares of Series G Preferred Stock were redeemed at a redemption price equal to their stated liquidation preference of $25.00 per share, representing $100.0 million in aggregate, plus all accrued and unpaid dividends to the Series G Redemption Date.

In connection with the redemption of the Series G and Series H Preferred Stock, during the year ended December 31, 2017 we recorded non-cash charges of $7.6 million as a reduction to net income available to common stockholders for the original issuance costs of the Series H and Series G Preferred Stock.

14. Partners’ Capital of the Operating Partnership

Common Units

Issuance of Common Units

In July 2019, the Company physically settled the forward equity sale agreements entered into in August 2018 (see Note 13 “Stockholders’ Equity of the Company”). Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million and contributed the net proceeds to the Operating Partnership in exchange for 5,000,000 common units.

At-The-Market Stock Offering Program

The Company did not issue any shares of common stock under its at-the-market stock offering program during the year ended December 31, 2019. During the years ended December 31, 2018 and 2017, the Company utilized its at-the-market stock offering programs to issue shares of common stock. See Note 13 “Stockholders’ Equity of the Company” for additional information. The net offering proceeds contributed by the Company to the Operating Partnership in exchange for common units for the years ended December 31, 2019, 2018 and 2017 are as follows:

	Year Ended December 31,
	2018		2017
	(in millions, except share and per share data)
Shares of common stock contributed by the Company	1,817,195		235,077
Common units exchanged for shares of common stock by the Company	1,817,195		235,077
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Common Units Outstanding

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units as well as the ownership interest held on each respective date:

	December 31, 2019		December 31, 2018
Company owned common units in the Operating Partnership	106,016,287		100,746,988
Company owned general partnership interest	98.1	%	98.0	%
Noncontrolling common units of the Operating Partnership	2,023,287		2,025,287
Ownership interest of noncontrolling interest	1.9	%	2.0	%

For a further discussion of the noncontrolling common units during the years ended December 31, 2019 and 2018, refer to Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements.”

Accrued Distributions

The following tables summarize accrued distributions for the noted common units as of December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Distributions payable to:
General partner	$	51,418	$	45,840
Common limited partners	981		922
RSU holders (1)	820		797
Total accrued distributions to common unitholders	$	53,219	$	47,559

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

	December 31, 2019	December 31, 2018
Outstanding Units:
Common units held by the general partner	106,016,287	100,746,988
Common units held by the limited partners	2,023,287	2,025,287
RSUs (1)	1,651,905	1,711,628

______________________

(1) Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

Preferred Units

On August 15, 2017, the Company redeemed all 4,000,000 shares of its 6.375% Series H Preferred Stock. For each share of Series H Preferred Stock that was outstanding, the Company had an equivalent number of 6.375% Series H Preferred Units (“Series H Preferred Units”) outstanding with substantially similar terms as the Series H Preferred Stock. In connection with the redemption of the Series H Preferred Stock, the Series H Preferred Units held by the Company were redeemed by the Operating Partnership.

On March 30, 2017, the Company redeemed all 4,000,000 shares of its 6.875% Series G Preferred Stock. For each share of Series G Preferred Stock that was outstanding, the Company had an equivalent number of 6.875% Series G Preferred Units (“Series G Preferred Units”) outstanding with substantially similar terms as the Series G Preferred Stock. In connection with the redemption of the Series G Preferred Stock, the Series G Preferred Units held by the Company were redeemed by the Operating Partnership.

In connection with the redemption of the Series G and Series H Preferred Stock, during the year ended December 31, 2017 we recorded non-cash charges of $7.6 million as a reduction to net income available to common unitholders for the original issuance costs of the Series H and Series G Preferred Stock.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

15.    Share-Based and Other Compensation

Stockholder Approved Share-Based Incentive Compensation Plan

As of December 31, 2019, we maintained one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan, as amended (the “2006 Plan”). The Company has a currently effective registration statement registering 9.2 million shares of our common stock for possible issuance under our 2006 Incentive Award Plan. As of December 31, 2019, approximately 0.4 million shares were available for grant under the 2006 Plan. The calculation of shares available for grant is presented after taking into account a reserve for a sufficient number of shares to cover the vesting and payment of 2006 Plan awards that were outstanding on that date, including performance-based vesting awards at (i) levels actually achieved for the performance conditions (as defined below) for which the performance period has been completed and (ii) at maximum levels for the other performance and market conditions (as defined below) for awards still in a performance period.

The Executive Compensation Committee (the “Compensation Committee”) of the Company’s Board of Directors may grant the following share-based awards to eligible individuals, as provided under the 2006 Plan: incentive stock options, nonqualified stock options, restricted stock (nonvested shares), stock appreciation rights, performance shares, performance stock units, dividend equivalents, stock payments, deferred stock, restricted stock units (“RSUs”), profit interest units, performance bonus awards, performance-based awards and other incentive awards. For each award granted under our share-based incentive compensation programs, the Operating Partnership simultaneously issues to the Company a number of common units equal to the number of shares of common stock ultimately paid by the Company in respect of such awards.

2019, 2018 and 2017 Share-Based Compensation Grants

In February 2019, the Executive Compensation Committee of the Company’s Board of Directors awarded 288,378 restricted stock units (“RSUs”) to certain officers of the Company under the 2006 Plan, which included 143,396 RSUs (at the target level of performance) that are subject to market and/or performance-based vesting requirements (the “2019 Performance-Based RSUs”) and 144,982 RSUs that are subject to time-based vesting requirements (the “2019 Time-Based RSUs”). During the year ended December 31, 2019, 10,733 2019 Time-Based RSUs, 24,353 2019 Performance-Based RSUs and 98,844 time vest and performance RSUs that were granted in prior years were forfeited.

In connection with entering into an amended employment agreement (the “Amended Employment Agreement”), on December 27, 2018, the Compensation Committee of the Company’s Board of Directors awarded John Kilroy, the Chairman of the Board of Directors, President and Chief Executive Officer of the Company and the Operating Partnership 483,871 RSUs, providing an additional retention incentive during the term of the agreement and enticing Mr. Kilroy to delay his retirement. Of these RSUs awarded, 266,130 RSUs (at the target level of performance) are subject to market-based vesting requirements and 217,741 RSUs are subject to time-based vesting requirements. In addition to Mr. Kilroy’s award, the Compensation Committee of the Company’s Board of Directors awarded 161,290 RSUs to certain members of management. Of these RSUs awarded, 80,647 RSUs (at the target level of performance) are subject to market-based vesting requirements (together totaling 346,777 target RSUs with Mr. Kilroy’s award, the “December 2018 Market-Based RSUs”) and 80,643 RSUs are subject to time-based vesting requirements (together totaling 298,384 RSUs with Mr. Kilroy’s award, the “December 2018 Time-Based RSUs”).

In January and February 2018, the Executive Compensation Committee of the Company’s Board of Directors awarded 282,038 RSUs to certain officers of the Company under the 2006 Plan, which included 158,205 RSUs (at the target level of performance) that are subject to market and/or performance-based vesting requirements (the “2018 Performance-Based RSUs”) and 123,833 RSUs that are subject to time-based vesting requirements (the “2018 Time-Based RSUs”). Additionally, during 2018, 14,999 RSUs were granted to the board of directors and certain members of management subject to time vesting requirements.

In February 2017, the Executive Compensation Committee of the Company’s Board of Directors awarded 229,976 RSUs to certain officers of the Company under the 2006 Plan, which included 130,956 RSUs (at the target level of performance) that are subject to time-based, market-measure based and performance-based vesting requirements (the

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

“2017 Performance-Based RSUs”) and 99,020 RSUs that are subject to time-based vesting requirements (the “2017 Time-Based RSUs”). Additionally, during 2017, 43,081 RSUs were granted to the board of directors and certain members of management subject to time vesting requirements.

December 2018 Market-Based RSU Grant

Between 0% and 200% of the total 346,777 target number of December 2018 Market-Based RSUs will be eligible to vest based on the Company’s relative total shareholder return (“TSR”) versus a comparative group of companies that consist of companies in the SNL US REIT Office Index over the performance period. An initial number of RSUs (the “Initial Number of RSUs”) will be determined at the end of 2021 based on a three year performance period (2019 through 2021). Once the Initial Number of RSUs is determined, 75% of the Initial Number of RSUs will be scheduled to vest on January 5, 2022. The remaining 25% of the Initial Number of RSUs will be scheduled to vest on January 5, 2023, subject to adjustment based on the Company’s relative TSR for the entire four-year performance period (2019 through 2022). The December 2018 Market-Based RSUs are also subject to service vesting requirements through the scheduled vest dates.

Each December 2018 Market-Based RSU represents the right to receive one share of our common stock in the future, subject to, and as modified by, the Company’s level of achievement of the applicable market conditions. The December 27, 2018 grant date fair value of the December 2018 Market-Based RSUs was $23.8 million. The fair value was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. For the year ended December 31, 2018, we recorded compensation expense based upon the $68.66 grant date fair value per share. Compensation expense for the December 2018 Market-Based RSUs is recognized using a graded vesting approach, where 75% of the fair value will be recognized on a straight-line basis over the three-year initial performance period through the end of 2021, and the remaining 25% of the fair value will be recognized on a straight-line basis over the four-year final performance period through the end of 2022. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	December 2018 Market-Based RSU Award Fair Value Assumptions
Valuation date	December 27, 2018
Fair value per share on valuation date	$68.66
Expected share price volatility	23.0%
Risk-free interest rate	2.4%

The computation of expected volatility was based on a blend of the historical volatility of our shares of common stock over a period of twice the performance period and implied volatility data based on the observed pricing of six month publicly-traded options on shares of our common stock. The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at December 27, 2018.

2019, 2018 and 2017 Annual Performance-Based RSU Grants

The 2019 Performance-Based RSUs are scheduled to vest at the end of a three year period (consisting of calendar years 2019-2021). A target number of 2019 Performance-Based RSUs were awarded, and the final number of 2019 Performance-Based RSUs that vest (which may be more or less than the target number) will be based upon (1) the achievement of pre-set FFO per share goals for the year ending December 31, 2019 that applies to 100% of the Performance-Based RSUs awarded (the “2019 FFO Performance Condition”) and (2) a performance measure that applies to 50% of the award based upon a measure of the Company’s average debt to EBITDA ratio for the three year performance period (the “2019 Debt to EBITDA Ratio Performance Condition”) and a market measure that applies to the other 50% of the award based upon the relative ranking of the Company’s total stockholder return for the three year performance period compared to the total stockholder returns of an established comparison group of companies over the same period (the “2019 Market Condition”). The 2019 Performance-Based RSUs are also subject to a three year service vesting provision (the “service vesting condition”) and are scheduled to cliff vest on the date the final vesting percentage is determined following the end of the three year performance period under the awards. The 2019 FFO Performance Condition was achieved at 175% of target for one participant and 150% of target for all other participants. The number of 2019 Performance-Based RSUs ultimately earned could fluctuate from the target number of 2019 Performance-Based RSUs granted based upon the levels of achievement for the 2019 Debt to EBITDA Ratio

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Performance Condition, the 2019 Market Condition, and the extent to which the service vesting condition is satisfied. The estimate of the number of 2019 Performance-Based RSUs earned is evaluated quarterly during the performance period based on our estimate for each of the performance conditions measured against the applicable goals. Compensation expense for the 2019 Performance-Based RSU grant is recognized on a straight-line basis over the requisite service period for each participant, which is generally the three year service period.

The 2018 Performance-Based RSUs are scheduled to vest at the end of a three year period (consisting of calendar years 2018-2020). A target number of 2018 Performance-Based RSUs were awarded, and the final number of 2018 Performance-Based RSUs that vest (which may be more or less than the target number) will be based upon (1) the achievement of pre-set FFO per share goals for the year ending December 31, 2018 that applies to 100% of the Performance-Based RSUs awarded (the “2018 FFO Performance Condition”) and (2) a performance measure that applies to 50% of the award based upon a measure of the Company’s average debt to EBITDA ratio for the three year performance period (the “2018 Debt to EBITDA Ratio Performance Condition” and together with the 2018 FFO Performance Condition, the “2018 Performance Conditions”) and a market measure that applies to the other 50% of the award based upon the relative ranking of the Company’s TSR for the three year performance period compared to the TSR of an established comparison group of companies over the same period (the “2018 Market Condition”). The 2018 Performance-Based RSUs are also subject to a three year service vesting provision and are scheduled to cliff vest on the date the final vesting percentage is determined following the end of the three year performance period under the awards. The 2018 FFO Performance Condition was achieved at 175% of target for one participant and 150% of target for all other participants. The number of 2018 Performance-Based RSUs ultimately earned could fluctuate from the current estimated number of 2018 Performance-Based RSUs granted based upon the levels of achievement for the 2018 Debt to EBITDA Ratio Performance Condition, the 2018 Market Condition and the extent to which the service vesting condition is satisfied.

The 2017 Performance-Based RSUs are scheduled to cliff vest at the end of a three year period (consisting of calendar years 2017-2019) based upon (1) the achievement of pre-defined FFO per share goals for the year ended December 31, 2017 that applies to 100% of the 2017 Performance-Based RSUs awarded (the “2017 FFO Performance Condition”) and (2) also based upon either the average FAD per share growth that applies to 30% of the award or the Company’s average debt to EBITDA ratio that applies to a separate 30% of the award (together, the “Other 2017 Performance Conditions” and together with the 2017 FFO Performance Condition, the “2017 Performance Conditions”) or the relative TSR versus a comparative group of companies that consist of companies in the SNL US REIT Office Index that applies to the remaining 40% of the award (the “2017 Market Condition”) for the three year period ending December 31, 2019. Based on the combined results of the 2017 Performance Conditions and the 2017 Market Condition, the 2017 Performance-Based RSUs achieved a weighted average of approximately 131% of their target level of performance.

As of December 31, 2019, the estimated number of RSUs earned for the 2019 and 2018 Performance-Based RSUs and the actual number of RSUs earned for the 2017 Performance-Based RSUs was as follows:

	2019 Performance-Based RSUs	2018 Performance-Based RSUs	2017 Performance-Based RSUs
Service vesting period	February 1, 2019 - January, 2022	February 14, 2018 - January, 2021	February 24, 2017 - January, 2020
Target RSUs granted	143,396	158,205	130,956
Estimated RSUs earned (1)	229,095	262,242	142,581
Date of valuation	February 1, 2019	February 14, 2018	February 24, 2017

_______________

(1) Estimated RSUs earned for the 2019 Performance-Based RSUs are based on the actual achievement of the 2019 FFO Performance Condition and for the 2019 Debt to EBITDA Ratio Performance Condition, assumes 125% of the target level of achievement for one participant and 117% of the target level of achievement for all other participants, and target level of achievement of the 2019 Market Condition. Estimated RSUs earned for the 2018 Performance-Based RSUs are based on the actual achievement of the 2018 FFO Performance Condition and assume target level achievement of the 2018 Market Condition and maximum level of achievement of the 2018 Debt to EBITDA Ratio Performance Condition. The 2017 Performance-Based RSUs earned are based on actual performance of the 2017 Performance Conditions and the 2017 Market Condition.

Each Performance-Based RSU represents the right to receive one share of our common stock in the future, subject to, and as modified by, the Company’s level of achievement of the applicable performance and market conditions. The fair values of the 2019 Performance-Based RSUs, 2018 Performance-Based RSUs and 2017 Performance-Based RSUs

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

were $10.2 million at February 1, 2019, $10.8 million at February 14, 2018, and $10.3 million at February 24, 2017, respectively. The fair values for the awards with market conditions were calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. The determination of the fair value of the 2019, 2018 and 2017 Performance-Based RSUs takes into consideration the likelihood of achievement of the 2019, 2018 and 2017 Performance Conditions and the 2019, 2018 and 2017 Market Conditions, respectively, as discussed above. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	2019 Award Fair Value Assumptions	2018 Award Fair Value Assumptions	2017 Award Fair Value Assumptions
Valuation date	February 1, 2019	February 14, 2018	February 24, 2017
Fair value per share on valuation date	$72.57	$70.08	$80.89
Expected share price volatility	19.0%	20.0%	21.0%
Risk-free interest rate	2.48%	2.37%	1.39%

The computation of expected volatility was based on a blend of the historical volatility of our shares of common stock over a period of twice the remaining performance period as of the grant date and implied volatility data based on the observed pricing of six month publicly-traded options on shares of our common stock. The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at February 1, 2019, February 14, 2018, and February 24, 2017.

Compensation expense for the Performance-Based RSUs is recognized on a straight-line basis over the requisite service period for each participant, which is generally the three-year service period. As of December 31, 2019, the number of 2019 Performance-Based RSUs estimated to be earned based on the Company’s estimate of the performance conditions measured against the applicable goals was 229,095, and the compensation cost recorded to date for this program was based on that estimate. For the portion of the 2019 Performance-Based RSUs subject to the 2019 Market Condition, for the year ended December 31, 2019, we recorded compensation expense based upon the $72.57 fair value per share at February 1, 2019. Compensation expense will be variable for the portion of the 2019 Performance-Based RSUs subject to the 2019 Debt to EBITDA Ratio Performance Condition, based upon the outcome of that condition. As of December 31, 2019, the number of 2018 Performance-Based RSUs estimated to be earned based on the Company’s estimate of the performance conditions measured against the applicable goals was 262,242, and the compensation cost recorded to date for this program was based on that estimate. For the portion of the 2018 Performance-Based RSUs subject to the 2018 Market Condition, for the years ended December 31, 2019 and 2018, we recorded compensation expense based upon the $70.08 fair value per share at February 14, 2018. Compensation expense will be variable for the portion of the 2018 Performance-Based RSUs subject to the 2018 Debt to EBITDA Performance Condition, based upon the outcome of that condition. For the years ended December 31, 2019, 2018 and 2017, we recorded compensation expense for the portion of the 2017 Performance-Based RSUs subject to the 2017 Market Condition based upon the $80.89 fair value per share at February 24, 2017 and for the portion of the 2017 Performance-Based RSUs subject to the 2017 Debt to EBITDA Ratio Performance Condition, based on the stock price at date of grant multiplied by the 142,581 RSUs, which is net of forfeitures, estimated to be earned at December 31, 2019.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Annual 2019, 2018 and 2017 and December 2018 Time-Based RSU Grants

The annual 2019, 2018 and 2017 Time-Based RSUs are scheduled to vest in equal installments over the periods listed below. The 2019 Time-Based RSUs are scheduled to vest in three equal annual installments beginning on January 5, 2020 through January 5, 2022. The December 2018 Time-Based RSUs are scheduled to vest 50% on January 5, 2022 and 50% on January 5, 2023. Compensation expense for the December 2018 and annual 2019, 2018 and 2017 Time-Based RSUs is recognized on a straight-line basis over the requisite service period, which is generally the explicit service period. However, for one participant there was a shorter service period for their 2017 and 2018 Time-Based RSUs. Each Time-Based RSU represents the right to receive one share of our common stock in the future, subject to continued employment through the applicable vesting date. The total fair value of the Time-Based RSUs is based on the Company's closing share price on the NYSE on the respective fair valuation dates as detailed in the table below:

	2019 Time-Based RSU Grant		December 2018 Time-Based RSU Grant		2018 Time-Based RSU Grant (1)		2017 Time-Based RSU Grant (2)
Service vesting period	February 1, 2019 - January 5, 2022		December 27, 2018 - January 5, 2023		January & February 2018 - January 5, 2021		February 2017 - January 5, 2020
Fair value on valuation date (in millions)	$	10.1	$	18.5	$	8.4	$	7.5
Fair value per share	$	69.89	$	62.00	$	70.37	$	73.30
Date of fair valuation	February 1, 2019		December 27, 2018		January & February 2018		February 2017

_______________

(1) The 2018 Time-Based RSUs consist of 56,015 RSUs granted on January 29, 2018 at a fair value per share of $70.37 and 67,818 RSUs granted on February 14, 2018 at a fair value per share of $66.46.

(2) The 2017 Time-Based RSUs consist of 41,119 RSUs granted on February 3, 2017 at a fair value per share of $73.30 and 57,901 RSUs granted on February 24, 2017 at a fair value per share of $77.16.

Summary of Performance and Market-Measure Based RSUs

A summary of our performance and market-measure based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted-Average Fair Value Per Share
Outstanding at January 1, 2019	1,018,337		$	67.29	35,761		1,054,098
Granted	231,191		71.12		1,155		232,346
Vested	(261,990	)	57.08		261,990		—
Settled (1)	—				(264,814	)	(264,814	)
Issuance of dividend equivalents (2)	23,254		74.11		2,592		25,846
Forfeited	(78,117	)	70.07		(5	)	(78,122	)
Outstanding as of December 31, 2019 (3)	932,675		$	71.04	36,679		969,354

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 125,220 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3) Outstanding RSUs as of December 31, 2019 represent the actual achievement of the FFO performance conditions and assumes target levels for the market and other performance conditions. The number of restricted stock units ultimately earned is subject to change based upon actual performance over the three-year vesting period. Dividend equivalents earned will vest along with the underlying award and are also subject to changes based on the number of RSUs ultimately earned for each underlying award.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

A summary of our performance and market-measure based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Years ended December 31,	Non-Vested RSUs Granted (1)	Weighted-Average Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (in thousands)
2019	231,191	$	71.12	(265,737	)	$	18,703
2018	601,012	68.51		(265,918	)	18,906
2017	170,994	78.97		(194,991	)	14,270

_______________

(1) Non-vested RSUs granted are based on the actual achievement of the FFO performance conditions and assumes target level achievement for the market and other performance conditions.

Summary of Time-Based RSUs

A summary of our time-based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted Average Fair Value Per Share
Outstanding at January 1, 2019	586,779		$	65.87	1,089,088		1,675,867
Granted	153,005		70.31		—		153,005
Vested	(153,464	)	67.26		153,464		—
Settled (1)					(198,183	)	(198,183	)
Issuance of dividend equivalents (2)	13,341		74.72		28,755		42,096
Forfeited	(55,813	)	68.71		—		(55,813	)
Canceled (3)					(1,746	)	(1,746	)
Outstanding as of December 31, 2019	543,848		$	66.66	1,071,378		1,615,226

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 82,646 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3) For shares vested but not yet settled, we accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy minimum statutory tax-withholding requirements related to either the settlement or vesting of RSUs in accordance with the terms of the 2006 Plan.

A summary of our time-based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Year ended December 31,	Non-Vested RSUs Issued	Weighted-Average Grant Date Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (1) (in thousands)
2019	153,005	$	70.31	(182,219	)	$	12,277
2018	437,216	64.21		(214,131	)	14,768
2017	142,101	74.91		(228,095	)	16,735

_______________

(1) Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting. Excludes the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Summary of Nonvested Restricted Stock

We did not have any nonvested restricted stock at January 1, 2019 or December 31, 2019. A summary of our nonvested and vested restricted stock activity for years ended December 31, 2018 and 2017 is presented below:

	Shares Granted		Shares Vested
Years ended December 31,	Nonvested Shares Issued	Weighted-Average Grant Date Fair Value Per Share	Vested Shares		Total Fair Value at Vest Date (1) (in thousands)
2018	—	—	(22,884	)	1,652
2017	—	—	(24,261	)	1,781

_______________

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.

Share-Based Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $32.8 million, $35.9 million and $26.3 million for the years ended December 31, 2019, 2018 and 2017, respectively. Of the total share-based compensation costs, $5.8 million, $8.0 million and $7.3 million was capitalized as part of real estate assets and for 2018 and 2017, deferred leasing costs, for the years ended December 31, 2019, 2018 and 2017, respectively. As of December 31, 2019, there was approximately $50.5 million of total unrecognized compensation cost related to nonvested incentive awards granted under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 2.1 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to December 31, 2019. The $50.5 million of unrecognized compensation costs does not reflect the future compensation cost related to share-based awards that were granted subsequent to December 31, 2019.

Other Compensation

On December 27, 2018, the Executive Compensation Committee of the Company’s Board approved, and the Company and the Operating Partnership entered into the Amended Employment Agreement with John Kilroy, which amends and supersedes the existing employment agreement dated January 1, 2012. Except as noted below, the Amended Employment Agreement continues Mr. Kilroy’s employment on terms substantially similar to those of the existing employment agreement, with a new term scheduled to continue through December 31, 2023. The Amended Employment Agreement includes a cash retirement benefit of $13.2 million, or $16.2 million for a retirement at or after attaining age 73, with at least twelve months’ advance notice or at or after the end of the term of the agreement. For the year ended December 31, 2018, the Company recognized $12.1 million of compensation expense in general and administrative expenses on the consolidated statement of operations, representing the present value of the potential cash retirement benefit amount that was earned based on prior service. For the year ended December 31, 2019, the Company recognized $1.5 million of compensation expense in general and administrative expenses on the consolidated statement of operations related to the Amended Employment Agreement.

16. Employee Benefit Plans

401(k) Plan

We have a retirement savings plan designed to qualify under Section 401(k) of the Code (the “401(k) Plan”). Our employees are eligible to participate in the 401(k) Plan on the first day of the month after three months of service. The 401(k) Plan allows eligible employees (“401(k) Participants”) to defer up to 60% of their eligible compensation on a pre-tax basis, subject to certain maximum amounts allowed by the Code. The 401(k) Plan provides for a matching contribution by the Company in an amount equal to 50 cents of each one dollar of participant contributions up to a maximum of 10% of the 401(k) Participant’s annual salary. 401(k) Participants vest immediately in the amounts contributed by us. For each of the years ended December 31, 2019, 2018, and 2017, we contributed $1.6 million, $1.5 million and $1.3 million, respectively, to the 401(k) Plan.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Deferred Compensation Plan

In 2007, we adopted the Deferred Compensation Plan, under which directors and certain management employees may defer receipt of their compensation, including up to 70% of their salaries and up to 100% of their director fees and bonuses, as applicable. In addition, employee participants will receive mandatory Company contributions to their Deferred Compensation Plan accounts equal to 10% of their gross monthly salaries, without regard to whether such employees elect to defer salary or bonus compensation under the Deferred Compensation Plan. Our Board may, but has no obligation to, approve additional discretionary contributions by the Company to Participant accounts. We hold the Deferred Compensation Plan assets in a limited rabbi trust, which is subject to the claims of our creditors in the event of bankruptcy or insolvency.

See Note 19 “Fair Value Measurements and Disclosures” for further discussion of our Deferred Compensation Plan assets as of December 31, 2019 and 2018. Our liability of $27.0 million and $21.7 million under the Deferred Compensation Plan was fully funded as of December 31, 2019 and 2018, respectively.

17. Future Minimum Rent

We have operating leases with tenants that expire at various dates through 2043 and are either subject to scheduled fixed increases or adjustments in rent based on the Consumer Price Index. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases as of December 31, 2019 for future periods is summarized as follows:

Year Ending	(in thousands)
2020	$	675,636
2021	728,736
2022	785,239
2023	769,294
2024	727,399
Thereafter	4,054,487
Total (1)	$	7,740,791

______________

(1) Excludes residential leases and leases with a term of one year or less.

Future contractual minimum rent under operating leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	566,783
2020	632,875
2021	631,835
2022	620,684
2023	586,371
Thereafter	3,240,143
Total (1)	$	6,278,691

______________

(1) Excludes residential leases and leases with a term of one year or less.

18. Commitments and Contingencies

General

As of December 31, 2019, we had commitments of approximately $1.0 billion, excluding our ground lease commitments, for contracts and executed leases directly related to our operating and development properties.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Ground Leases

The following table summarizes our properties that are held subject to long-term noncancellable ground lease obligations and the respective contractual expiration dates:

Property	Contractual Expiration Date (1)
601 108th Ave NE, Bellevue, WA	November 2093
701, 801 and 837 N. 34th Street, Seattle, WA (2)	December 2041
1701 Page Mill Road and 3150 Porter Drive, Palo Alto, CA	December 2067
Kilroy Airport Center Phases I, II, and III, Long Beach, CA	July 2084
3243 S. La Cienega Boulevard, Los Angeles, CA (3)	October 2106

____________________

(1) Reflects the contractual expiration date prior to the impact of any extension or purchase options held by the Company.

(2) The Company has three 10-year and one 45-year extension options for this ground lease, which if exercised would extend the expiration date to December 2116.

(3) We entered into this ground lease in connection with an operating property acquisition in 2019. Refer to Note 3 “Acquisitions” for additional information.

As of December 31, 2019, the weighted average remaining lease term of our ground leases is 55 years. For the year ended December 31, 2019, variable lease costs totaling $2.9 million, were recorded to ground leases expense on our consolidated statements of operations.

The minimum commitment under our ground leases as of December 31, 2019 for five years and thereafter is as

follows:

Year Ending	(in thousands)
2020	5,641
2021	5,641
2022	5,642
2023	5,662
2024	5,662
Thereafter	286,385
Total undiscounted cash flows (1)(2)(3)(4)(5)(6)	$	314,633
Present value discount	(216,233		)
Ground lease liabilities	$	98,400

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2019.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(5) One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every 10 years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(6) One of our ground lease obligations is subject to fixed 5% ground rent increases every five years, with the next increase occurring on December 1, 2022.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The minimum commitment under our ground leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	5,154
2020	5,154
2021	5,154
2022	5,154
2023	5,154
Thereafter	233,619
Total (1)(2)(3)(4)(5)	$	259,389

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2018.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(5) One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every ten years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

Environmental Matters

We follow the policy of monitoring all of our properties, including acquisition, development, and existing stabilized portfolio properties, for the presence of hazardous or toxic substances. While there can be no assurance that a material environmental liability does not exist, we are not currently aware of any environmental liability with respect to our stabilized portfolio properties that would have a material adverse effect on our financial condition, results of operations and cash flow, or that we believe would require additional disclosure or the recording of a loss contingency.

As of December 31, 2019 and 2018, we had accrued environmental remediation liabilities of approximately $80.7 million and $83.2 million, respectively, recorded on our consolidated balance sheets in connection with certain of our in-process and future development projects. The accrued environmental remediation liabilities represent the remaining costs we estimate we will incur prior to and during the development process at various development acquisition sites. These estimates, which we developed with the assistance of third party experts, consist primarily of the removal of contaminated soil, performing environmental closure activities, constructing remedial systems, and other related costs since we are required to dispose of any existing contaminated soil, and sometimes perform other environmental closure or remedial activities, when we develop new buildings at these sites.

We record estimated environmental remediation obligations for acquired properties at the acquisition date when we are aware of such costs and when such costs are probable of being incurred and can be reasonably estimated. Estimated costs related to development environmental remediation liabilities are recorded as an increase to the cost of the development project. Actual costs are recorded as a decrease to the liability when incurred. These accruals are adjusted as an increase or decrease to the development project costs and as an increase or decrease to the accrued environmental remediation liability if we obtain further information or circumstances change. The environmental remediation obligations recorded at December 31, 2019 and 2018 were not discounted to their present values since the amount and timing of cash payments are not fixed. It is possible that we could incur additional environmental remediation costs in connection with these development projects.  However, potential additional environmental costs for these development projects cannot be reasonably estimated at this time and certain changes in estimates could occur as the site conditions, final project timing, design elements, actual soil conditions and other aspects of the projects, which may depend upon municipal and other approvals beyond the control of the Company, are determined.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Other than the accrued environmental liabilities discussed above, we are not aware of any unasserted claims and assessments with respect to an environmental liability that we believe would require additional disclosure or the recording of an additional loss contingency.

Litigation

We and our properties are subject to litigation arising in the ordinary course of business. To our knowledge, neither we nor any of our properties are presently subject to any litigation or threat of litigation which, if determined unfavorably to us, would have a material adverse effect on our cash flow, financial condition, or results of operations.

Insurance

We maintain commercial general liability, auto liability, employers’ liability, umbrella/excess liability, special form property, difference in conditions including earthquake and flood, environmental, rental loss, and terrorism insurance covering all of our properties. Management believes the policy specifications and insured limits are reasonable given the relative risk of loss, the cost of the coverage, and industry practice. We do not carry insurance for generally uninsurable losses such as loss from governmental action, nuclear hazard, and war and military action. Policies are subject to various terms, conditions, and exclusions and some policies may involve large deductibles or co-payments.

19.    Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets we record at fair value on our consolidated financial statements are the marketable securities related to our Deferred Compensation Plan (see Note 16 “Employee Benefit Plans” for additional information). The following table sets forth the fair value of our marketable securities as of December 31, 2019 and 2018:

	Fair Value (Level 1) (1)
	2019		2018
Description	(in thousands)
Marketable securities (2)	$	27,098	$	21,779

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment (losses) gains in the consolidated statements of operations. We also adjust the related Deferred Compensation Plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to compensation cost for the period.

The following table sets forth the net (loss) gain on marketable securities recorded during the years ended December 31, 2019, 2018 and 2017:

	December 31,
	2019		2018			2017
Description	(in thousands)
Net gain (loss) on marketable securities	$	3,885	$	(1,851	)	$	3,023

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of December 31, 2019 and 2018: 

	December 31,
	2019				2018
	Carrying Value		Fair Value (1)		Carrying Value		Fair Value (1)
	(in thousands)
Liabilities
Secured debt, net	$	258,593	$	272,997	$	335,531	$	335,885
Unsecured debt, net	3,049,185		3,252,217		2,552,070		2,546,386
Unsecured line of credit	245,000		245,195		45,000		45,058

_______________

(1) Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

20.    Other Significant Events

During the year ended December 31, 2019, we recorded a $2.9 million net increase in rental income on our consolidated statements of operations primarily due to a $4.2 million increase in revenue related to the improved credit quality of a tenant for which we previously recorded a bad debt reserve during the year ended December 31, 2018, partially offset by a $1.3 million decrease in revenue for other tenants with diminished credit quality during the year ended December 31, 2019.

During the year ended December 31, 2018, we recognized $5.7 million of provision for bad debts. The provision for bad debts was primarily due to a $7.0 million provision for one tenant recognized during the second quarter of 2018, partially offset by a $1.4 million decrease in the provision for bad debts for one lease due to the assignment of the lease to a credit tenant during the second quarter of 2018.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

21. Net Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	195,443		$	258,415		$	164,612
Total preferred dividends	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common stockholders	$	193,324		$	256,411		$	149,274
Denominator:
Basic weighted average vested shares outstanding	103,200,568			99,972,359			98,113,561
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested shares and common stock equivalents outstanding	103,849,168			100,482,365			98,727,331
Basic earnings per share:
Net income available to common stockholders per share	$	1.87		$	2.56		$	1.52
Diluted earnings per share:
Net income available to common stockholders per share	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common shares, including stock options, RSUs, shares issuable under executed forward equity sale agreements and other securities are considered in our diluted earnings per share calculation for the years ended December 31, 2019, 2018, and 2017. Certain market measure-based RSUs are not included in dilutive securities as of December 31, 2019, 2018, and 2017 as not all performance metrics had been met by the end of the applicable reporting periods.

See Note 15 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

22. Net Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the years ended 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	198,738		$	263,210		$	167,440
Total preferred distributions	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common unitholders	$	196,619		$	261,206		$	152,102
Denominator:
Basic weighted average vested units outstanding	105,223,975			102,025,276			100,246,567
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested units and common unit equivalents outstanding	105,872,575			102,535,282			100,860,337
Basic earnings per unit:
Net income available to common unitholders per unit	$	1.87		$	2.56		$	1.52
Diluted earnings per unit:
Net income available to common unitholders per unit	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common units, including stock options, RSUs, shares issuable under executed forward equity sale agreements and other securities are considered in our diluted earnings per share calculation for the years ended December 31, 2019, 2018 and 2017. Certain market measure-based RSUs are not included in dilutive securities as of December 31, 2019, 2018 and 2017 as not all performance metrics had been met by the end of the applicable reporting periods.

See Note 15 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

23.    Supplemental Cash Flow Information of the Company

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of    December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common     unitholders (Notes 13 and 28)	$	53,219	$	47,559	$	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s    common stock	$	78	$	1,962	$	10,939

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

F - 59

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

24.    Supplemental Cash Flow Information of the Operating Partnership:

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$	53,219	$	47,559	$	43,448

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

F - 60

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

25.    Tax Treatment of Distributions

The following table reconciles the dividends declared per share of common stock to the dividends paid per share of common stock during the years ended December 31, 2019, 2018 and 2017 as follows: 

	Year Ended December 31,
Dividends	2019			2018			2017
Dividends declared per share of common stock	$	1.910		$	1.790		$	1.650
Less: Dividends declared in the current year and paid in the following year	(0.485		)	(0.455		)	(0.425		)
Add: Dividends declared in the prior year and paid in the current year (1)	0.455			0.425			2.275
Dividends paid per share of common stock	$	1.880		$	1.760		$	3.500

_________________

(1) The fourth quarter 2016 dividend of $2.275 per share of common stock consists of a special cash dividend of $1.90 per share of common stock and a regular quarterly cash dividend of $0.375 per share of common stock. The $1.90 per share special distribution is treated as paid in two tax years for income tax purposes: $1.587 is treated as paid on December 31, 2016 and $0.313 is treated as paid on January 13, 2017. The $0.375 per share regular quarterly distribution is considered a 2017 dividend distribution for income tax purposes.

The unaudited income tax treatment for the dividends to common stockholders reportable for the years ended December 31, 2019, 2018 and 2017 as identified in the table above was as follows: 

	Year Ended December 31,
Shares of Common Stock	2019				2018				2017
Ordinary income (1)	$	0.939	49.95	%	$	1.474	83.73	%	$	1.356	70.87	%
Qualified dividend	0.004		0.21		0.003		0.19		0.002		0.11
Return of capital	0.312		16.62		0.275		15.64		0.344		18.00
Capital gains (2)	0.600		31.93		0.008		0.44		—		—
Unrecaptured section 1250 gains	0.025		1.29		—		—		0.211		11.02
	$	1.880	100.00	%	$	1.760	100.00	%	$	1.913	100.00	%

_________________

(1) The Tax Cuts and Jobs Act enacted on December 22, 2017 generally allows a deduction for noncorporate taxpayers equal to 20% of ordinary dividends distributed by a REIT (excluding capital gain dividends and qualified dividend income). The amount of dividend eligible for this deduction is referred to as the Section 199A Dividend.  For the year ended December 31, 2019, the Section 199A Dividend is equal to the total ordinary income dividend.

(2) Capital gains are comprised entirely of 20% rate gains.

F - 61

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

26. Quarterly Financial Information of the Company (Unaudited)

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows: 

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to Kilroy Realty Corporation	36,903		42,194		43,846		72,500
Net income available to common stockholders	36,903		42,194		43,846		72,500
Net income available to common stockholders per share – basic	0.36		0.41		0.41		0.68
Net income available to common stockholders per share – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to Kilroy Realty Corporation	36,246		27,549		34,400		160,220
Net income available to common stockholders	36,246		27,549		34,400		160,220
Net income available to common stockholders per share – basic	0.36		0.27		0.34		1.59
Net income available to common stockholders per share – diluted	0.36		0.27		0.33		1.58

____________________

(1) The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering activity during the year.

F - 62

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

27. Quarterly Financial Information of the Operating Partnership (Unaudited)

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows:

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to the Operating Partnership	37,508		42,901		44,589		73,740
Net income available to common unitholders	37,508		42,901		44,589		73,740
Net income available to common unitholders per unit – basic	0.36		0.41		0.41		0.68
Net income available to common unitholders per unit – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to the Operating Partnership	36,893		28,015		34,993		163,309
Net income available to common unitholders	36,893		28,015		34,993		163,309
Net income available to common unitholders per unit – basic	0.36		0.27		0.34		1.58
Net income available to common unitholders per unit – diluted	0.36		0.27		0.33		1.57

___________________

(1) The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering programs that occurred during the year.

28. Subsequent Events

On January 15, 2020, $53.2 million of dividends were paid out to common stockholders, common unitholders and RSU holders of record on December 31, 2019.

On January 31, 2020, the Executive Compensation Committee granted 109,359 Time-Based RSUs and 154,267 Performance-Based RSUs to key employees under the 2006 Plan. The compensation cost related to the RSUs is expected to be recognized over a period of three years.

F - 63

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

Years ended December 31, 2019, 2018 and 2017

(in thousands)

	Balance at Beginning of Period (1)		Charged to Costs and Expenses (2)		Recoveries (Deductions)			Balance at End of Period
Allowance for Uncollectible Tenant Receivables for the year ended December 31,
2019 – Allowance for uncollectible tenant receivables	$	512	$	907	$	(248	)	$	1,171
2018 – Allowance for uncollectible tenant receivables	2,309		2,604		(274		)	4,639
2017 – Allowance for uncollectible tenant receivables	1,712		1,517		(920		)	2,309
Allowance for Deferred Rent Receivables for the year ended December 31,
2019 – Allowance for deferred rent	$	195	$	1,357	$	—		$	1,552
2018 – Allowance for deferred rent	3,238		165		(64		)	3,339
2017 – Allowance for deferred rent	1,524		1,752		(38		)	3,238

__________________

(1) On January 1, 2019, the Company adopted Topic 842 on a modified retrospective basis and recognized a cumulative-effect adjustment to distributions in excess of earnings related to the allowances for uncollectible tenant receivables and deferred rent receivables. As such, the ending balances of the allowances for uncollectible tenant receivables and deferred rent receivables at December 31, 2018 do not equal the beginning balances on January 1, 2019.

(2) For the year ended December 31, 2019, amounts do not reflect leases deemed not probable of collection for which we reversed the associated revenue under Topic 842. In addition, for the years ended December 31, 2019 and 2018, $0.7 million and $2.9 million, respectively, was charged to costs and expenses for a valuation allowance for a note receivable.

F - 64

KILROY REALTY CORPORATION AND KILROY REALTY, L.P

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION

December 31, 2019

	Initial Cost									Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances			Land and improve- ments		Buildings and Improve- ments		Costs Capitalized Subsequent  to Acquisition/ Improvement		Land and improve- ments		Buildings and Improve- ments		Total		Accumulated Depreciation		Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
Office Properties:
3077-3243 S. La Cienega Blvd., Culver City, CA				$	150,718	$	31,032	$	2	$	150,718	$	31,034	$	181,752	$	1,227	35	2019	A	151,908
2240 E. Imperial Highway, El Segundo, CA				1,044		11,763		29,542		1,048		41,301		42,349		26,943		35	1983	C	122,870
2250 E. Imperial Highway, El Segundo, CA				2,579		29,062		36,294		2,547		65,388		67,935		54,789		35	1983	C	298,728
2260 E. Imperial Highway, El Segundo, CA				2,518		28,370		36,764		2,547		65,105		67,652		16,320		35	1983	C	298,728
909 N. Pacific Coast Highway, El Segundo, CA				3,577		34,042		50,104		3,577		84,146		87,723		41,765		35	2005	C	244,136
999 N. Pacific Coast Highway, El Segundo, CA				1,407		34,326		16,897		1,407		51,223		52,630		25,350		35	2003	C	128,588
6115 W. Sunset Blvd., Los Angeles, CA (4)				1,313		3		16,436		2,455		15,297		17,752		2,165		35	2015	C	26,105
6121 W. Sunset Blvd., Los Angeles, CA (4)				11,120		4,256		43,971		8,703		50,644		59,347		7,262		35	2015	C	91,173
1525 N. Gower St., Los Angeles, CA (4)				1,318		3		9,641		1,318		9,644		10,962		1,206		35	2016	C	9,610
1575 N. Gower St., Los Angeles, CA (4)				22,153		51		119,460		22,153		119,511		141,664		11,813		35	2016	C	251,245
1500 N. El Centro Ave., Los Angeles, CA (4)				9,235		21		58,603		9,235		58,624		67,859		6,208		35	2016	C	104,504
1550 N. El Centro Ave., Los Angeles, CA (4) (5)				16,970		39		135,847		16,970		135,886		152,856		13,895		35	2016	C	—
6255 W. Sunset Blvd., Los Angeles, CA				18,111		60,320		46,112		18,111		106,432		124,543		35,548		35	2012	A	323,920
3750 Kilroy Airport Way, Long Beach, CA				—		1,941		11,610		—		13,551		13,551		10,822		35	1989	C	10,457
3760 Kilroy Airport Way, Long Beach, CA				—		17,467		14,902		—		32,369		32,369		26,878		35	1989	C	165,278
3780 Kilroy Airport Way, Long Beach, CA				—		22,319		26,442		—		48,761		48,761		39,320		35	1989	C	221,452
3800 Kilroy Airport Way, Long Beach, CA				—		19,408		21,806		—		41,214		41,214		24,877		35	2000	C	192,476
3840 Kilroy Airport Way, Long Beach, CA				—		13,586		10,666		—		24,252		24,252		16,162		35	1999	C	136,026
3880 Kilroy Airport Way, Long Beach, CA				—		9,704		11,463		—		21,167		21,167		4,517		35	1997	A	96,035
3900 Kilroy Airport Way, Long Beach, CA				—		12,615		12,433		—		25,048		25,048		18,248		35	1997	A	129,893
Kilroy Airport Center, Phase IV, Long Beach, CA (6)				—		—		4,997		—		4,997		4,997		4,997		35	—		—
8560 W. Sunset Blvd., West Hollywood, CA				9,720		50,956		1,587		9,720		52,543		62,263		6,289		35	2016	A	71,875
8570 W Sunset Blvd., West Hollywood, CA				31,693		27,974		4,589		31,693		32,563		64,256		3,090		35	2016	A	43,603
8580 W. Sunset Blvd., West Hollywood, CA				10,013		3,695		648		10,013		4,343		14,356		392		35	2016	A	7,126
8590 W. Sunset Blvd., West Hollywood, CA				39,954		27,884		5,192		39,954		33,076		73,030		3,370		35	2016	A	56,095
12100 W. Olympic Blvd., Los Angeles, CA	$	170,000	(7)	352		45,611		18,617		9,633		54,947		64,580		29,197		35	2003	C	152,048
12200 W. Olympic Blvd., Los Angeles, CA			(7)	4,329		35,488		24,224		3,977		60,064		64,041		39,654		35	2000	C	150,832
12233 W. Olympic Blvd., Los Angeles, CA				22,100		53,170		4,676		22,100		57,846		79,946		14,055		35	2012	A	151,029
12312 W. Olympic Blvd., Los Angeles, CA			(7)	3,325		12,202		12,346		3,399		24,474		27,873		13,463		35	1997	A	76,644
1633 26th St., Santa Monica, CA				2,080		6,672		3,581		2,040		10,293		12,333		7,177		35	1997	A	43,857
2100/2110 Colorado Ave., Santa Monica, CA				5,474		26,087		14,678		5,476		40,763		46,239		25,730		35	1997	A	102,864
3130 Wilshire Blvd., Santa Monica, CA				8,921		6,579		16,799		9,188		23,111		32,299		15,989		35	1997	A	90,074
501 Santa Monica Blvd., Santa Monica, CA				4,547		12,044		15,889		4,551		27,929		32,480		17,346		35	1998	A	76,803

F - 65

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

	Initial Cost					Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances		Land and improve- ments	Buildings and Improve- ments	Costs Capitalized Subsequent  to Acquisition/ Improvement	Land and improve- ments	Buildings and Improve- ments	Total	Accumulated Depreciation	Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
12225 El Camino Real, Del Mar, CA			1,700	9,633	3,714	1,673	13,374	15,047	9,224	35	1998	A	58,401
12235 El Camino Real, Del Mar, CA			1,507	8,543	9,022	1,540	17,532	19,072	10,435	35	1998	A	53,751
12340 El Camino Real, Del Mar, CA			4,201	13,896	11,660	4,201	25,556	29,757	12,128	35	2002	C	89,272
12390 El Camino Real, Del Mar, CA			3,453	11,981	8,804	3,453	20,785	24,238	9,540	35	2000	C	70,140
12348 High Bluff Dr., Del Mar, CA			1,629	3,096	6,323	1,629	9,419	11,048	6,636	35	1999	C	38,806
12400 High Bluff Dr., Del Mar, CA			15,167	40,497	14,473	15,167	54,970	70,137	28,866	35	2004	C	209,220
3579 Valley Centre Dr., Del Mar, CA			2,167	6,897	7,628	2,858	13,834	16,692	10,015	35	1999	C	54,960
3611 Valley Centre Dr., Del Mar, CA			4,184	19,352	19,881	5,259	38,158	43,417	25,713	35	2000	C	129,656
3661 Valley Centre Dr., Del Mar, CA			4,038	21,144	18,843	4,725	39,300	44,025	22,291	35	2001	C	128,364
3721 Valley Centre Dr., Del Mar, CA			4,297	18,967	14,705	4,254	33,715	37,969	17,509	35	2003	C	115,193
3811 Valley Centre Dr., Del Mar, CA			3,452	16,152	20,234	4,457	35,381	39,838	22,848	35	2000	C	112,067
12770 El Camino Real, Del Mar, CA			9,360	—	33,708	9,360	33,708	43,068	3,281	35	2015	C	73,032
12780 El Camino Real, Del Mar, CA			18,398	54,954	19,637	18,398	74,591	92,989	15,891	35	2013	A	140,591
12790 El Camino Real, Del Mar, CA			10,252	21,236	1,915	10,252	23,151	33,403	5,768	35	2013	A	78,836
3745 Paseo Place, Del Mar, CA (Retail) (8)			24,358	—	71,800	24,358	71,800	96,158	1,683	35	2019	C	—
3200 Paseo Village Way, San Diego, CA (Resi Phase I) (9)			40,186	—	102,749	40,186	102,749	142,935	937	35	2019	C	—
13280 Evening Creek Dr. South, I-15 Corridor, CA			3,701	8,398	4,729	3,701	13,127	16,828	5,809	35	2008	C	41,196
13290 Evening Creek Dr. South, I-15 Corridor, CA			5,229	11,871	6,128	5,229	17,999	23,228	6,797	35	2008	C	61,180
13480 Evening Creek Dr. South, I-15 Corridor, CA			7,997	—	52,826	7,997	52,826	60,823	20,167	35	2008	C	154,157
13500 Evening Creek Dr. South, I-15 Corridor, CA			7,581	35,903	18,106	7,581	54,009	61,590	22,402	35	2004	A	137,658
13520 Evening Creek Dr. South, I-15 Corridor, CA			7,580	35,903	17,778	7,580	53,681	61,261	24,885	35	2004	A	146,701
2305 Historic Decatur Rd., Point Loma, CA			5,240	22,220	7,309	5,240	29,529	34,769	10,801	35	2010	A	107,456
4690 Executive Dr., University Towne Centre, CA			1,623	7,926	3,722	1,623	11,648	13,271	7,829	35	1999	A	47,846
4100 Bohannon Dr., Menlo Park, CA		(10)	4,835	15,526	567	4,860	16,068	20,928	4,557	35	2012	A	47,379
4200 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	3,703	4,662	19,245	23,907	5,788	35	2012	A	45,451
4300 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,958	3,248	6,470	24,263	30,733	7,803	35	2012	A	63,079
4400 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	2,905	4,939	18,170	23,109	5,779	35	2012	A	48,146
4500 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,957	3,422	6,470	24,436	30,906	6,552	35	2012	A	63,078
4600 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	3,571	4,939	18,836	23,775	5,660	35	2012	A	48,147
4700 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,958	1,488	6,470	22,503	28,973	6,326	35	2012	A	63,078
1290 - 1300 Terra Bella Ave., Mountain View, CA			28,730	27,555	61	28,730	27,616	56,346	4,809	35	2016	A	114,175
331 Fairchild Dr., Mountain View, CA			18,396	17,712	7,962	18,396	25,674	44,070	5,575	35	2013	C	87,147
680 E. Middlefield Rd., Mountain View, CA			34,605	—	56,470	34,605	56,470	91,075	9,813	35	2014	C	170,090
690 E. Middlefield Rd., Mountain View, CA			34,755	—	56,713	34,755	56,713	91,468	9,855	35	2014	C	170,823
1701 Page Mill Rd., Palo Alto, CA			—	99,522	30	—	99,552	99,552	9,002	35	2016	A	128,688

F - 66

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

	Initial Cost									Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances			Land and improve- ments		Buildings and Improve- ments		Costs Capitalized Subsequent  to Acquisition/ Improvement		Land and improve- ments			Buildings and Improve- ments		Total		Accumulated Depreciation		Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
3150 Porter Dr., Palo Alto, CA				—		21,715		4		—			21,719		21,719		2,387		35	2016	A	36,897
900 Jefferson Ave., Redwood City, CA (11)				16,668		—		109,375		18,063			107,980		126,043		15,824		35	2015	C	228,505
900 Middlefield Rd., Redwood City, CA (11)				7,959		—		50,114		8,626			49,447		58,073		6,941		35	2015	C	118,764
303 Second St., San Francisco, CA (12)				63,550		154,153		84,572		63,550			238,725		302,275		83,973		35	2010	A	784,658
100 First St., San Francisco, CA (13)				49,150		131,238		64,883		49,150			196,121		245,271		62,989		35	2010	A	467,095
250 Brannan St., San Francisco, CA				7,630		22,770		9,932		7,630			32,702		40,332		10,651		35	2011	A	100,850
201 Third St., San Francisco, CA				19,260		84,018		66,962		19,260			150,980		170,240		55,837		35	2011	A	346,538
301 Brannan St., San Francisco, CA				5,910		22,450		8,174		5,910			30,624		36,534		10,091		35	2011	A	82,834
360 Third St., San Francisco, CA				—		88,235		121,323		28,504			181,054		209,558		46,907		35	2011	A	429,796
333 Brannan St., San Francisco, CA				18,645		—		81,016		18,645			81,016		99,661		8,826		35	2016	C	185,602
350 Mission St., San Francisco, CA				52,815		—		213,450		52,815			213,450		266,265		24,500		35	2016	C	455,340
100 Hooper St., San Francisco, CA				78,564		—		196,251		88,510			186,305		274,815		5,978		35	2018	C	394,340
345 Brannan St., San Francisco, CA				29,405		113,179		1,322		29,403			114,503		143,906		3,697		35	2018	A	110,050
345 Oyster Point Blvd., South San Francisco, CA				13,745		18,575		1		13,745			18,576		32,321		1,167		35	2018	A	40,410
347 Oyster Point Blvd., South San Francisco, CA				14,071		18,289		44		14,071			18,333		32,404		1,150		35	2018	A	39,780
349 Oyster Point Blvd., South San Francisco, CA				23,112		22,601		324		23,112			22,925		46,037		1,926		35	2018	A	65,340
505 Mathilda Ave., Sunnyvale, CA				37,843		1,163		50,450		37,943			51,513		89,456		7,827		35	2014	C	212,322
555 Mathilda Ave., Sunnyvale, CA				37,843		1,163		50,447		37,943			51,510		89,453		7,827		35	2014	C	212,322
605 Mathilda Ave., Sunnyvale, CA				29,014		891		77,281		29,090			78,096		107,186		17,289		35	2014	C	162,785
599 Mathilda Ave., Sunnyvale, CA				13,538		12,559		139		13,538			12,698		26,236		4,147		35	2012	A	76,031
1800 Owens St., San Francisco, CA (14)				95,388		—		428,066		95,388			428,066		523,454		4,467		35	2019	C	—
601 108th Ave., Bellevue, WA				—		214,095		38,536		—			252,631		252,631		79,397		35	2011	A	488,470
10900 NE 4th St., Bellevue, WA				25,080		150,877		40,547		25,080			191,424		216,504		54,159		35	2012	A	428,557
837 N. 34th St., Lake Union, WA				—		37,404		4,950		—			42,354		42,354		11,132		35	2012	A	112,487
701 N. 34th St., Lake Union, WA				—		48,027		8,226		—			56,253		56,253		15,982		35	2012	A	141,860
801 N. 34 St., Lake Union, WA				—		58,537		17,222		—			75,759		75,759		16,318		35	2012	A	169,412
320 Westlake Ave. North, WA	89,502		(15)	14,710		82,018		14,378		14,710			96,396		111,106		19,817		35	2013	A	184,644
321 Terry Avenue North, Lake Union, WA			(15)	10,430		60,003		10,321		10,430			70,324		80,754		15,561		35	2013	A	135,755
401 Terry Avenue North, Lake Union, WA				22,500		77,046		13		22,500			77,059		99,559		15,556		35	2014	A	140,605
TOTAL OPERATING PROPERTIES	259,502			1,413,997		2,717,671		3,200,975		1,466,166		65	5,866,477		7,332,643		1,561,361					13,475,795
Undeveloped land and construction in progress	—			1,058,176		—		1,237,954		1,058,176			1,237,954		2,296,130		—					—
TOTAL ALL PROPERTIES	$	259,502	(16)	$	2,472,173	$	2,717,671	$	4,438,929	$	2,524,342		$	7,104,432	$	9,628,773	$	1,561,361				13,475,795

F - 67

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

__________________

(1) The initial costs of buildings and improvements are depreciated over 35 years using a straight-line method of accounting; improvements capitalized subsequent to acquisition are depreciated over the shorter of the lease term or useful life, generally ranging from one to 20 years.

(2) Represents our date of construction or acquisition, or of our predecessor, the Kilroy Group.

(3) Includes square footage from our stabilized portfolio.

(4) These properties include the costs of a shared parking structure for a complex comprised of five office buildings and one residential tower. The costs of the parking structure are allocated amongst the six buildings.

(5) This property represents the 200-unit Columbia Square - Residential tower that stabilized in 2016.

(6) These costs represent infrastructure costs incurred in 1989. During the third quarter of 2009, we exercised our option to terminate the ground lease at Kilroy Airport Center, Phase IV in Long Beach, California. We had previously leased this land, which is adjacent to our Office Properties at Kilroy Airport Center, Long Beach, for potential future development opportunities.

(7) These properties secure a $170.0 million mortgage note.

(8) This property is currently in the tenant improvement phase of our in-process development projects and not yet in the stabilized portfolio. The estimated rentable square feet for this property is 96,000 rentable square feet.

(9) This property represents the first completed phase of the One Paseo residential property containing 237 units.

(10) These properties secure intercompany promissory notes between KRLP and the consolidated property partnerships.

(11) These properties are owned by Redwood City Partners LLC, a consolidated property partnership.

(12) This property is owned by 303 Second Street Member LLC, a consolidated property partnership.

(13) This property is owned by 100 First Street Member LLC, a consolidated property partnership.

(14) This property is currently in the tenant improvement phase of our in-process development projects and not yet in the stabilized portfolio. The estimated rentable square feet for this property is 750,000 rentable square feet.

(15) These properties secure a $89.5 million mortgage note.

(16) Represents gross aggregate principal amount before the effect of the deferred financing costs of $0.9 million as of December 31, 2019.units.

F - 68

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

As of December 31, 2019, the aggregate gross cost of property included above for federal income tax purposes approximated $7.9 billion. This amount excludes approximately $0.2 billion of gross costs attributable to properties held in VIEs at December 31, 2019 to facilitate potential future Section 1031 Exchanges.

The following table reconciles the historical cost of total real estate held for investment from January 1, 2017 to December 31, 2019:

	Year Ended December 31,
	2019			2018 (1)			2017
	(in thousands)
Total real estate held for investment, beginning of year	$	8,426,632		$	7,417,777		$	7,060,754
Additions during period:
Acquisitions	460,512			581,671			19,829
Improvements, etc.	890,654			724,016			533,939
Total additions during period	1,351,166			1,305,687			553,768
Deductions during period:
Cost of real estate sold	(120,788		)	(286,623		)	(191,610		)
Other	(28,237		)	(10,209		)	(5,135		)
Total deductions during period	(149,025		)	(296,832		)	(196,745		)
Total real estate held for investment, end of year	$	9,628,773		$	8,426,632		$	7,417,777

__________________

(1) Amounts presented in Improvements, etc. and Other have been revised for the year ended December 31, 2018 to conform to the current year presentation with amounts transferred from undeveloped land and construction in progress to land and improvements and buildings and improvements presented on a net basis, which did not have any impact on total real estate held for investment at December 31, 2018.

The following table reconciles the accumulated depreciation from January 1, 2017 to December 31, 2019:

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Accumulated depreciation, beginning of year	$	1,391,368		$	1,264,162		$	1,139,853
Additions during period:
Depreciation of real estate	211,893			198,578			190,515
Total additions during period	211,893			198,578			190,515
Deductions during period:
Write-offs due to sale	(41,655		)	(71,372		)	(66,206		)
Properties held for sale	—			—			—
Other	(245		)	—			—
Total deductions during period	(41,900		)	(71,372		)	(66,206		)
Accumulated depreciation, end of year	$	1,561,361		$	1,391,368		$	1,264,162

F - 69

EXHIBIT INDEX

Exhibit Number	Description
3.(i)1	Kilroy Realty Corporation Articles of Restatement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2012)
3.(i)2	Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)3	Amendment to the Certificate of Limited Partnership of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
3.(i)4	Articles Supplementary reclassifying shares of the Series G Preferred Stock of the Company (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 23, 2017)
3.(i)5	Articles Supplementary reclassifying shares of the Series H Preferred Stock of the Company (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 23, 2017)
3.(ii)1	Fifth Amended and Restated Bylaws of Kilroy Realty Corporation (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 1, 2017)
3.(ii)2	Seventh Amended and Restated Agreement of Limited Partnership of Kilroy Realty, L.P. dated August 15, 2012, as amended (previously filed by Kilroy Realty Corporation on Form 10-Q for the quarter ended June 30, 2014)
4.(vi)1*	Description of Capital Stock of Kilroy Realty Corporation
4.(vi)2*	Description of Common Units Representing Limited Partnership Interests of Kilroy Realty, L.P.
4.1	Kilroy Realty Corporation Form of Certificate for Common Stock (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
4.2	Registration Rights Agreement, dated January 31, 1997 (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
4.3	Form of Certificate for Partnership Units of Kilroy Realty, L.P. (previously filed by Kilroy Realty, L.P., as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010)
4.4	Registration Rights Agreement, dated July 31, 2012 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2012)
4.5	Officers’ Certificate pursuant to Sections 101, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.800% Notes due 2023,” including the form of 3.800% Notes due 2023 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on January 14, 2013)
4.6	Indenture, dated March 1, 2011, by and among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit to the Registration Statement on Form S-3 as filed with the Securities and Exchange Commission on October 2, 2013)
4.7	Supplemental Indenture, dated July 5, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit to the Registration Statement on Form S-3 as filed with the Securities and Exchange Commission on October 2, 2013)

4.8	Officers’ Certificate pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.25% Senior Notes due 2029,” including the form of 4.25% Senior Notes due 2029 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on August 6, 2014)
4.9	Officers’ Certificate, dated September 16, 2015, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.375% Senior Notes due 2025,” including the form of 4.375% Senior Notes due 2025 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 16, 2015)
4.10	Officers’ Certificate, dated December 11, 2017, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.450% Senior Notes due 2024,” including the form of 3.450% Senior Notes due 2024 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 11, 2017)
4.11	Officers’ Certificate, dated November 29, 2018, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, as amended and supplemented, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “4.750% Senior Notes due 2028,” including the form of 4.750% Senior Note due 2028 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on November 29, 2018)
4.12	Officers’ Certificate, dated September 17, 2019, pursuant to Sections 102, 201, 301 and 303 of the Indenture dated March 1, 2011, as amended and supplemented, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee, establishing a series of securities entitled “3.050% Senior Notes due 2030,” including the form of 3.050% Senior Note due 2030 and the form of related guarantee (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 17, 2019)
4.13	The Company is party to agreements in connection with long-term debt obligations, none of which individually exceeds ten percent of the total assets of the Company on a consolidated basis. Pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K, the Company agrees to furnish copies of these agreements to the Commission upon request
10.1	Pledge Agreement by and among Kilroy Realty, L.P., John B. Kilroy, Sr., John B. Kilroy, Jr. and Kilroy Industries (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
10.2†	1997 Stock Option and Incentive Plan of the Registrant and Kilroy Realty, L.P. (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 3 to Form S-11 (No. 333-15553))
10.3	License Agreement by and among the Registrant and the other persons named therein (previously filed by Kilroy Realty Corporation as an exhibit to the Registration Statement on Amendment No. 4 to Form S-11 (No. 333-15553))
10.4†	Form of Restricted Stock Award Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 8, 2007)
10.5†	Kilroy Realty Corporation Stock Award Deferral Program (previously filed by Kilroy Realty Corporation as an exhibit to Form 8-K as filed with the Securities and Exchange Commission on January 2, 2008)
10.6†	Form of Indemnification Agreement of Kilroy Realty Corporation with certain officers and directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-K for the year ended December 31, 2009)
10.7†	Kilroy Realty Corporation Form of Stock Option Grant Notice and Stock Option Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on February 24, 2012)

10.8†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2013)
10.9†	Form of Stock Award Deferral Program Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended June 30, 2013)
10.10†	Form of Performance-Vest Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.11†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.12†	Form of Restricted Stock Unit Agreement for Non-Employee Members of the Board of Directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2014)
10.13†	Form of Performance-Vest Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.14†	Form of Restricted Stock Unit Agreement (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.15†	Form of Restricted Stock Unit Agreement for Non-Employee Members of the Board of Directors (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2015)
10.16†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of December 31, 2015 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-K for the year ended December 31, 2015)
10.17†	Confidential Separation Agreement and Release of Claims by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Stephen A. Rosetta effective as of August 26, 2019 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended September 30, 2019)
10.18†	Extension of Employment Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of February 28, 2019 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2019)
10.19†*	Extension of Employment Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Jeffrey C. Hawken effective as of January 31, 2020
10.20†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and Jeffrey C. Hawken, dated January 9, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.21†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Tyler H. Rose effective as of January 28, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.22†	Amended and Restated Employment Agreement and Non-Competition Agreement by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and Justin W. Smart effective as of January 28, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2016)
10.23†	Kilroy Realty Corporation Director Compensation Policy effective as of April 1, 2018 (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended March 31, 2018.
10.24†	Employment Agreement, as amended and restated December 27, 2018, by and between Kilroy Realty Corporation, Kilroy Realty, L.P. and John B. Kilroy, Jr. (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)
10.25†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and John B. Kilroy, Jr., dated December 27, 2018 (with retirement as to Time-Based RSUs) (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)

10.26†	Kilroy Realty Corporation 2006 Incentive Award Plan Restricted Stock Unit Agreement by and between Kilroy Realty Corporation and John B. Kilroy, Jr., dated December 27, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 31, 2018)
10.27†	Form of Restricted Stock Unit Agreement for 2006 Incentive Award Plan
10.28	Note Purchase Agreement dated September 14, 2016 (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on September 14, 2016)
10.29	Amendment to Note Purchase Agreement dated May 11, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 14, 2018)
10.30	Form of Time Sharing Agreement of Kilroy Realty, L.P. (previously filed by Kilroy Realty Corporation as an exhibit on Form 10-Q for the quarter ended September 30, 2016)
10.31	Promissory Note, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.32	Loan Agreement, dated November 29, 2016, by and between KR WMC, LLC and Massachusetts Mutual Life Insurance Company (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.33	Deed of Trust, Assignment of Leases and Rents, Security Agreement and Fixture Filing, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.34	Assignment of Leases and Rents, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.35	Recourse Guaranty Agreement, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.36	Environmental Indemnification Agreement, dated November 29, 2016 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2017)
10.37†	Kilroy Realty Corporation 2007 Deferred Compensation Plan, as amended and restated effective January 1, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-K for the year ended December 31, 2016)
10.38	General Partner Guaranty Agreement, dated February 17, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended March 31, 2017)
10.39†	Kilroy Realty 2006 Incentive Award Plan (previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 23, 2017)
10.40	Second Amended and Restated Credit Agreement dated as of July 24, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended June 30, 2017)
10.41	Second Amended and Restated Guaranty dated as of July 24, 2017 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 10-Q for the quarter ended on June 30, 2017)
10.42	Note Purchase Agreement dated May 11, 2018 (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 14, 2018)
10.43	Sales Agreement, dated June 5, 2018, between and among Kilroy Realty Corporation, Kilroy Realty, L.P. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Jefferies LLC, J.P. Morgan Securities LLC, Raymond James & Associates, Inc., RBC Capital Markets, LLC, Scotia Capital (USA) Inc. and SMBC Nikko Securities America, Inc. as Agents, and the Forward Purchasers (previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P., as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on June 5, 2018)
21.1*	List of Subsidiaries of Kilroy Realty Corporation
21.2*	List of Subsidiaries of Kilroy Realty, L.P.

23.1*	Consent of Deloitte & Touche LLP for Kilroy Realty Corporation
23.2*	Consent of Deloitte & Touche LLP for Kilroy Realty, L.P.
24.1*	Power of Attorney (included on the signature page of this Form 10-K)
31.1*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty Corporation
31.2*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty Corporation
31.3*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty, L.P.
31.4*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty, L.P.
32.1*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty Corporation
32.2*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty Corporation
32.3*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty, L.P.
32.4*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty, L.P.
101.1	The following Kilroy Realty Corporation and Kilroy Realty, L.P. financial information for the year ended December 31, 2019, formatted in inline XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Changes in Equity, (iv) Consolidated Statements of Capital, (v) Consolidated Statements of Cash Flows and (vi) Notes to the Consolidated Financial Statements(1)

*	Filed herewith
†	Management contract or compensatory plan or arrangement.
(1)	Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933 or Section 18 of the Securities Exchange Act of 1934 and otherwise are not subject to liability under these sections.

EX-4.VI1

Exhibit 4.(vi)1

DESCRIPTION OF CAPITAL STOCK

The following is a description of some of the material terms and provisions of the capital stock of Kilroy Realty Corporation registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The following description is a summary only and does not purport to be complete and is subject to, and qualified in its entirety by reference to the provisions of the Company’s charter and bylaws, copies of which have been filed as exhibits to the Annual Report on Form 10-K to which this “Description of Capital Stock” is an exhibit, and the applicable provisions of the Maryland General Corporation Law (the “MGCL”). While we believe the following description covers the material terms and provisions of our common stock it may not include all of the information that is important to you. We encourage you to read carefully the applicable provisions of the MGCL and our charter and bylaws for a more complete understanding of our common stock.As used in this “Description of Capital Stock,” references to the “Company,” “we,” “our” or “us” refer solely to Kilroy Realty Corporation and not to any of its subsidiaries, unless otherwise expressly stated or the context otherwise requires.

Common Stock

General

The Company’s charter authorizes us to issue up to 150,000,000 shares of common stock, par value $.01 per share. As of December 31, 2019, we had 106,016,287 shares of common stock issued and outstanding.

Shares of our common stock:

• are entitled to one vote per share on all matters presented to stockholders generally for a vote, including the election of directors, with no right to cumulative voting;

• do not have any conversion rights;

• do not have any exchange rights;

• do not have any sinking fund rights;

• do not have any redemption rights;

• do not generally have any appraisal rights;

• do not have any preemptive rights to subscribe for any of our securities; and

• are subject to restrictions on ownership and transfer.

We may pay dividends and other distributions on shares of the Company’s common stock, subject to the preferential rights of any series or class of capital stock that we may issue in the future with rights to dividends and other distributions senior to the Company’s common stock or creditors, in the case of our liquidation, dissolution or winding-up. However, we may only pay dividends when the board of directors (in its sole discretion) authorizes and declares a dividend out of legally available funds therefor. All dividends and other distributions will be paid to the holders of our common stock on pro rata basis.

The Company’s board of directors may:

• in its sole discretion, classify or reclassify any unissued shares of the Company’s common stock into other classes or series of capital stock, whether now or hereafter authorized;

• establish the number of shares in each of these classes or series of capital stock;

• establish the par value of the shares in each of these classes or series of capital stock;

• establish any preference rights, conversion rights and other rights, including voting powers, of each of these classes or series of capital stock;

• establish restrictions, such as limitations and restrictions on ownership, transfer, dividends or other distributions of each of these classes or series of capital stock; and

• establish qualifications and terms or conditions of redemption for each of these classes or series of capital stock.

In addition, the Company does not have a classified board of directors.

Preferred Stock

The Company’s charter authorizes us to issue up to 30,000,000 shares of preferred stock, par value $.01 per share, none of which are currently classified and designated or are issued and outstanding. As of December 31, 2019, 30,000,000 shares of the Company’s preferred stock were available for classification, designation and issuance.

We may classify, designate and issue authorized shares of preferred stock, in one or more classes or series, as authorized by the board of directors without the prior consent of the Company’s stockholders. The board of directors may grant the holders of preferred stock of any class or series preferences, powers and rights—voting or otherwise—senior to the rights of holders of shares of the Company’s common stock. The board of directors can authorize the issuance of currently authorized shares of preferred stock with terms and conditions that could have the effect of delaying or preventing a change of control transaction that might involve a premium price for holders of shares of the Company’s common stock or otherwise be in their best interest. All shares of preferred stock that and are or become issued and outstanding are or will be fully paid and nonassessable. Before we may issue any shares of preferred stock of any class or series, the MGCL and the Company’s charter require the board of directors to determine the following with respect to such class or series:

• the designation;

• the terms;

• preferences with respect to distributions and in the event of our liquidation, dissolution or winding-up;

• conversion and other rights, if any;

• voting powers;

• restrictions;

• limitations as to distributions;

• qualifications; and

• terms or conditions of redemption, if any.

Restrictions on Ownership and Transfer of the Company’s Capital Stock

Internal Revenue Code Requirements

To maintain the Company’s tax status as a REIT, five or fewer “individuals,” as that term is defined in the Code, which includes certain entities, may not own, actually or constructively, more than 50% in value of the Company’s issued and outstanding capital stock at any time during the last half of a taxable year. Constructive ownership provisions in the Code determine if any individual or entity constructively owns the Company’s capital stock for purposes of this requirement. In addition, 100 or more persons must beneficially own the Company’s capital stock during at least 335 days of a taxable year or during a proportionate part of a short taxable year. Also, rent from tenants in which we actually or constructively own a 10% or greater interest is not qualifying income for purposes of the gross income tests of the Code. To help ensure we meet these tests, the Company’s charter restricts the acquisition and ownership of shares of the Company’s common stock.

Transfer Restrictions in the Company’s Charter

Subject to exceptions specified therein, the Company’s charter provides that no holder may own, either actually or constructively under the applicable constructive ownership provisions of the Code, more than 7.0%, by number of shares or value, whichever is more restrictive, of the outstanding shares of the Company’s common stock.

In addition, because rent from tenants in which we actually or constructively own a 10% or greater interest is not qualifying rent for purposes of the gross income tests under the Code, the Company’s charter provides that no holder may own, either actually or constructively by virtue of the constructive ownership provisions of the Code,

which differ from the constructive ownership provisions used for purposes of the preceding sentence, more than 9.8%, by number of shares or value, whichever is more restrictive, of the outstanding shares of the Company’s common stock.

We refer to the limits described in the two preceding paragraphs, together, as the “ownership limits.”

The constructive ownership provisions set forth in the Code are complex, and may cause shares of the Company’s common stock owned actually or constructively by a group of related individuals and/or entities to be constructively owned by one individual or entity. As a result, the acquisition of shares of the Company’s common stock in an amount that does not exceed the ownership limits, or the acquisition of an interest in an entity that actually or constructively owns the Company’s common stock, could, nevertheless cause that individual or entity, or another individual or entity, to own constructively shares in excess of the ownership limits and thus violate the ownership limits described above or otherwise permitted by the Company’s board of directors.

The Company’s charter permits the board of directors to waive the ownership limits with respect to a particular common stockholder if the board of directors, among other things:

• determines that such waiver will not cause any individual’s beneficial ownership of shares of the Company’s common stock to violate the 7.0% limitation described above or that any exemption from such ownership limit will not cause the Company to fail to qualify as a REIT; and

• determines that such stockholder does not and will not own, actually or constructively, an interest in a tenant of the Company (or a tenant of any entity owned in whole or in part by the Company) that would cause the Company to own, actually or constructively, more than a 9.8% interest (as set forth in Section 856(d)(2)(B) of the Code) in such tenant, subject to certain exceptions.

As a condition of this waiver, the Company’s board of directors may require opinions of counsel satisfactory to it and/or undertakings or representations from the applicant with respect to preserving the Company’s REIT status. The board of directors has waived the ownership limit applicable to the Company’s common stock forJohn B. Kilroy, Sr. and John Kilroy, members of their families and some of their affiliated entities, allowing them to own up to 19.6% of the Company’s common stock. However, the board of directors conditioned this waiver upon the receipt of undertakings and representations from Messrs. Kilroy which it believed were reasonably necessary to conclude that the waiver would not cause us to fail to qualify and maintain the Company’s status as a REIT.

In addition to the foregoing ownership limits, the Company’s charter provides that no holder may own, either actually or constructively under the applicable attribution rules of the Code, any shares of the Company’s common stock if, as a result of this ownership:

• more than 50% in value of the Company’s outstanding common stock would be owned, either actually or constructively under the applicable constructive ownership provisions of the Code, by five or fewer individuals, as defined in the Code; or

• the Company would fail to qualify as a REIT.

If shares of common stock are transferred to any person in a manner which result in the Company’s capital stock being beneficially owned by less than 100 persons (determined without reference to any rules of attribution), the Company’s charter provides that the transfer shall be null and void in its entirety, and the intended transferee will acquire no rights in such common stock.

Under the Company’s charter, any person who acquires or attempts or intends to acquire actual or constructive ownership of the Company’s shares of common stock that violate any of the foregoing restrictions on transferability and ownership must give us notice immediately and provide us with any other information that we may request to determine the effect of the transfer on the Company’s status as a REIT. The foregoing restrictions on transferability and ownership will not apply if the Company’s board of directors determines that it is no longer in the Company’s best interest to attempt to qualify, or to continue to qualify, as a REIT and such determination is approved by the affirmative vote of holders of at least two-thirds of the shares of the Company’s capital stock outstanding and entitled to vote thereon.

The terms of any class or series of preferred stock that we may issue in the future may include restrictions on ownership and transfer, and provide for exceptions to or waivers of those restrictions, similar to those described under this caption “—Transfer Restrictions in the Company’s Charter,” as well as remedies for violation of those restrictions similar to those described below under “—Effect of Violation of Ownership Limits and Transfer Restrictions.”

Effect of Violation of Ownership Limits and Transfer Restrictions

The Company’s charter provides that if any transfer or other event occurs that, if effective, would result in any person owning shares of Company’s common stock in violation of the ownership limits or other restrictions on ownership and transfer of our stock described above, the number of shares of common stock that otherwise would cause such person to violate the ownership limits or other restrictions on ownership and transfer of our stock (the “excess shares”) will be transferred automatically to a trust, the beneficiary of which will be a qualified charitable organization selected by us or, if for any reason that transfer is not automatically effective, then the transfer of such excess shares shall be void ab initio and the purported transferee will not have any rights in such excess shares. The automatic transfer will be effective as of the close of business on the business day prior to the date of the violative transfer.

The trustee of the charitable trust must:

• within 20 days of receiving notice from us of the transfer of excess shares to the trust,

◦ sell the excess shares to a person or entity who could own the shares without violating the ownership limits or as otherwise permitted by the board of directors, and

◦ distribute to the prohibited transferee or owner, as applicable, an amount equal to the lesser of the price paid by the prohibited transferee or owner for the excess shares (or, if the event which resulted in the transfer to the charitable trust did not involve a purchase of the applicable stock for fair value, the market price of such shares on the day of the event which resulted in such transfer to the charitable trust) or the sales proceeds (net any commissions and other expenses of sale) received by the trust for the excess shares; and   

• distribute any proceeds in excess of the amount distributable to the prohibited transferee or owner, as applicable, to the charitable organization selected by us as beneficiary of the trust.

Excess shares transferred to the charitable trust shall be deemed to have been offered for sale to us at a price per share equal to the lesser of the price paid by the prohibited transferee or owner for the excess shares (or, if the event which resulted in the transfer to the charitable shares did not involve the purchase of the applicable stock for fair value, the market price of such shares on the day of the event which resulted in the transfer of such shares to the charitable trust) and the market price on the date we accept such offer. We will have the right to accept such offer until the charitable trust has sold the excess shares as described above.

The trustee shall be designated by us and be unaffiliated with us and any prohibited transferee or owner. Prior to a sale of any excess shares by the trust, the trustee will receive, in trust for the beneficiary, all dividends and other distributions paid by us with respect to the excess shares, and may also exercise all voting rights with respect to the excess shares.

The Company’s charter provides that, subject to Maryland law, effective as of the date that the shares have been transferred to the trust, the trustee shall have the authority, at the trustee’s sole discretion:

• to rescind as void any vote cast by a prohibited transferee or owner, as applicable, prior to our discovery that the Company’s shares have been transferred to the trust; and

• to recast the vote in accordance with the desires of the trustee acting for the benefit of the beneficiary of the trust.

However, if we have already taken irreversible corporate action, then the trustee may not rescind and recast the vote. Any dividend or other distribution paid to the prohibited transferee or owner, prior to our discovery that the

shares had been automatically transferred to a trust as described above, must be repaid to the trustee upon demand for distribution to the beneficiary of the trust. If the transfer to the trust as described above is not automatically effective, for any reason, to prevent violation of the applicable ownership limit or as otherwise permitted by the board of directors, then the Company’s charter provides that the transfer of the excess shares will be void ab initio.

If the Company’s board of directors shall at any time determine in good faith that a person has acquired, intends to acquire or own, has attempted to acquire or own, or may acquire or own the Company’s common stock in violation of the limits described above, the Company’s charter provides that the board of directors shall take actions to refuse to give effect to or to prevent the ownership or acquisition, including, but not limited to:

• authorizing us to repurchase stock;

• refusing to give effect to the ownership or acquisition on our books; or

• instituting proceedings to enjoin the ownership or acquisition.

All certificates representing shares of the Company’s capital stock bear a legend referring to the restrictions described above.

All persons who own at least a specified percentage of the issued and outstanding shares of the Company’s stock must file with us a completed questionnaire annually containing information about their ownership of the shares, as set forth in the applicable Treasury regulations. Under current Treasury regulations, the percentage is between 0.5% and 5.0%, depending on the number of record holders of the Company’s shares. In addition, each stockholdermay be required to disclose to us in writing information about the actual and constructive ownership of the Company’s shares as the board of directors deems necessary to comply with the provisions of the Code applicable to a REIT or to comply with the requirements of any taxing authority or governmental agency.

These ownership limitations could discourage a takeover or other transaction in which holders of some, or a majority, of the Company’s shares of capital stock might receive a premium for their shares over the then prevailing market price or which stockholders might believe to be otherwise in their best interest.

Certain Provisions of the Maryland General Corporation Law and of the Company’s Charter and Bylaws

Under the Maryland General Corporation Law, or the MGCL, the Company’s stockholders are generally not liable for our debts or obligations. In the event of the voluntary or involuntary liquidation, dissolution or winding-up of the Company, we will first pay all debts and other liabilities, including debts and liabilities arising out of the Company’s status as general partner of the operating partnership, and, second, any preferential distributions on any issued and outstanding shares of our preferred stock, if any. Each holder of the Company’s common stock then will share ratably in our remaining assets. All shares of the Company’s common stock have equal distribution, liquidation and voting rights, and have no preference or exchange rights, subject to the transfer and ownership limits in the Company’s charter or as permitted by the board of directors pursuant to executed agreements waiving these ownership limits with respect to specific stockholders.

Under the MGCL, we generally require approval by the Company’s stockholders by the affirmative vote of at least two-thirds of the votes entitled to vote before we can:

 authorizing us to repurchase stock;

• dissolve;

• amend the Company’s charter (except for limited exceptions);

• merge;

• sell all or substantially all of the Company’s assets;

• engage in a share exchange; or

• engage in similar transactions outside the ordinary course of business.

Under the MGCL and our charter, the board of directors may, without stockholder approval, make certain minor amendments to the charter, and if the charter allows, which ours does, classify or reclassify any unissued stock from time to time by setting or changing the preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends, qualifications, or terms or conditions of redemption of the stock.

With respect to the sale of all or substantially all of the Company’s assets, because the term “substantially all” of a company’s assets is not defined in the MGCL, it is subject to Maryland common law and to judicial interpretation and review in the context of the unique facts and circumstances of any particular transaction.

Although the MGCL allows the Company’s charter to establish a lesser percentage of affirmative votes by the Company’s stockholders for approval of those actions, the Company’s charter does not include such a provision.

The Board of Directors

The Company’s charter provides that the number of the directors shall be six directors until that number is increased or decreased in accordance with the bylaws of the Company; provided, however, such number cannot be less than the minimum number required by the MGCL, which is one. The Company’s bylaws allow the board of directors to fix or change the number to not fewer than three and not more than 13 members. The number of directors is currently fixed at six. A majority of the remaining board of directors may fill any vacancy, other than a vacancy caused by removal. A majority of the board of directors may fill a vacancy resulting from an increase in the number of directors. The stockholders entitled to vote for the election of directors at an annual or special meeting of the Company’s stockholders may fill a vacancy resulting from the removal of a director.

The Company’s charter and bylaws provide that a majority of the board of directors must be “independent directors.” An “independent director” is a director who is not:

• an employee, officer or affiliate of us or one of our subsidiaries or divisions;

• a relative of a principal executive officer; or

• an individual member of an organization acting as advisor, consultant or legal counsel, who receives compensation on a continuing basis from us in addition to director’s fees.

No Cumulative Voting

Holders of shares of Company common stock have no right to cumulative voting for the election of directors. Consequently, at each annual meeting of the Company’s stockholders, the holders of a majority of the shares of Company common stock entitled to vote will be able to elect all of the successors of the directors at that meeting.

Removal of Directors

The Company’s charter provides that its stockholders may remove a director only for “cause” and only by the affirmative vote of at least two-thirds of the shares entitled to vote in the election of directors. The MGCL does not define the term “cause.” As a result, removal for “cause” is subject to Maryland common law and to judicial interpretation and review in the context of the unique facts and circumstances of any particular situation.

Election of Directors

The Company’s bylaws provide a majority vote standard for uncontested elections of directors. As a result, except in the case of directors to be elected by the holders of any class or series of the Company’s preferred stock, at each meeting of stockholders at which the election of directors is uncontested, a director nominee will be elected to the board of directors only if the number of votes cast “FOR” the nominee exceeds the number of votes cast

“AGAINST” the nominee (with abstentions and broker non-votes not counted as a vote cast either “FOR” or “AGAINST” the director nominee). A plurality vote standard applies in contested elections, in which case stockholders will not be permitted to vote “AGAINST” any director nominee but will only be permitted to vote “FOR” or withhold their vote with respect to such nominee. An election will be considered to be contested if the Company’s secretary has received notice that a stockholder or group of stockholders has nominated or proposes to nominate one or more persons for election as a director, such notice purports to be in compliance with the advance notice requirements or the proxy access requirements set forth in the Company’s bylaws, and, at least 14 days prior to the date on which notice of the meeting is first mailed to stockholders, the nomination has not been withdrawn and would thereby cause the number of director nominees to exceed the number of directors to be elected at the meeting.

Under the MGCL, if an incumbent director is not re-elected at a meeting of stockholders at which he or she stands for re-election in an uncontested election, then the incumbent director continues to serve in office as a holdover director until his or her successor is elected and qualifies. However, the Company’s bylaws provide that if an incumbent director is not re-elected due to his or her failure to receive a majority of the votes cast in an uncontested election, the director will promptly tender his or her resignation as a director, subject to acceptance by the board of directors, for consideration by the nominating and corporate governance committee of the board of directors. The nominating and corporate governance committee of the board of directors will then make a recommendation to the board of directors as to whether to accept or reject the tendered resignation or whether other action should be taken. The board of directors will publicly disclose within 90 days of certification of the stockholder vote its decision and rationale regarding whether to accept, reject or take other action with respect to the tendered resignation. If a director’s tendered resignation is not accepted by the board of directors, such director would continue to serve until the next annual meeting of stockholders and until his or her successor is elected and qualified or his or her earlier death, retirement, resignation or removal. If a director’s tendered resignation is accepted, then the board of directors may, among other things, fill the resulting vacancy or decrease the size of the board of directors.

The Company is not Subject to the Maryland Business Combination Act

The Company has elected not to be subject to the “business combination” provisions of the MGCL (Sections 3-601 through 3-605) pursuant to the board of directors’ adoption of certain resolutions related thereto. Such resolutions also provide that the board of directors cannot rescind such election and become subject to these business combination provisions without the approval of holders of a majority of its shares entitled to vote.

In the event that the Company decides to be subject to the business combinations provision, “business combinations” between a Maryland corporation and an interested stockholder or an affiliate of an interested stockholder are generally prohibited for five years after the most recent date on which the interested stockholder becomes an interested stockholder. A business combination includes a merger, consolidation or share exchange. A business combination may also include an asset transfer or issuance or reclassification of equity securities. An interested stockholder is defined in the MGCL as:

• any person (other than the corporation or any subsidiary) who beneficially owns, directly or indirectly, ten percent or more of the voting power of the corporation’s shares; or

• an affiliate or associate of the corporation who, at any time within the two-year period prior to the date in question, was the beneficial owner, directly or indirectly, of ten percent or more of the voting power of the then outstanding stock of the corporation.

A person is not an interested stockholder under the business combinations provisions of the MGCL if the board of directors approved in advance the transaction by which such person would otherwise have become an interested stockholder.

At the conclusion of the five-year prohibition, any business combination between the Maryland corporation and an interested stockholder generally must be recommended by the board of directors of the corporation and approved by the affirmative vote of at least:

• 80% of the votes entitled to be cast by holders of outstanding shares of voting stock of the corporation; and

• two-thirds of the votes entitled to be cast by holders of voting stock of the corporation other than shares held by the interested stockholder with whom or with whose affiliate the business combination is to be effected or held by an affiliate or associate of the interested stockholder.

These super-majority vote requirements do not apply if the corporation’s common stockholders receive a minimum price, as defined under the MGCL, for their shares in the form of cash or other consideration in the same form as previously paid by the interested stockholder for its shares. None of these provisions of the MGCL will apply, however, to business combinations that are approved or exempted by the board of directors of the corporation prior to the time that the interested stockholder becomes an interested stockholder.

As a result of the Company’s decision not to be subject to the business combinations statute, an interested stockholder would be able to effect a “business combination” without complying with the requirements discussed above, which may make it easier for stockholders who become interested stockholders to consummate a business combination involving the Company. However, the Company cannot assure you that any business combinations will be consummated or, if consummated, will result in a purchase of shares of capital stock from its stockholders at a premium.

The Company is not Subject to the Maryland Control Share Acquisition Act

The Company has elected in its bylaws not to be subject to the “control share acquisition” provisions of the MGCL (Sections 3-701 through 3-710). If it wants to be subject to these provisions, its bylaws would need to be amended. Such amendments would require the approval of the holders of a majority of all votes entitled to be cast by the holders of the issued and outstanding shares of the Company’s common stock.

The MGCL provides that “control shares” of a company acquired in a “control share acquisition” have no voting rights except to the extent approved by a vote of two-thirds of the votes entitled to vote, excluding shares owned by the acquiror or by officers or directors who are employees of the Company. “Control shares” are voting shares of stock which, if aggregated with all other voting shares of stock previously acquired by the acquiror, or over which the acquiror is able to directly or indirectly exercise voting power, except solely by revocable proxy, would entitle the acquiror to exercise voting power in electing directors within one of the following ranges of voting power:

• one-tenth or more but less than one-third;

• one-third or more but less than a majority; or

• a majority or more of all voting power.

“Control shares” do not include shares of stock the acquiring person is entitled to vote having obtained prior stockholder approval. Generally, “control share acquisition” means the acquisition of control shares.

A person who has made or proposes to make a control share acquisition may compel the board of directors to call a special meeting of stockholders to consider voting rights for the shares. The meeting must be held within 50 days of demand. If no request for a meeting is made, the Company may present the question at any stockholders’ meeting.

If voting rights are not approved at the meeting or if the acquiring person does not deliver an acquiring person statement as required by the statute, then, subject to conditions and limitations, the corporation may redeem any or all of the control shares, except those for which voting rights previously have been approved, for fair value.

Fair value is determined without regard to the absence of voting rights for control shares, as of the date of the last control share acquisition or of any meeting of stockholders at which the voting rights of control shares are considered and not approved. If voting rights for control shares are approved at a stockholders meeting and the acquiror becomes entitled to vote a majority of the shares entitled to vote, all other stockholders may exercise appraisal rights. The fair value of the shares as determined for purposes of these appraisal rights may not be less than the highest price per share paid in the control share acquisition. Limitations and restrictions otherwise applicable to the exercise of dissenters’ rights do not apply in the context of a control share acquisition.

The control share acquisition statute does not apply to shares acquired in a merger, consolidation or share exchange if the company is a party to the transaction, or to acquisitions approved or exempted by its charter or bylaws. Because the Company is not subject to these provisions, stockholders who acquire a substantial block of Company common stock do not need approval of the other stockholders before exercising full voting rights with respect to their shares on all matters. This may make it easier for any of these control share stockholders to effect a business combination with the Company. However, the Company cannot assure you that any business combinations will be consummated or, if consummated, will result in a purchase of shares of Company common stock from any stockholder at a premium.

Unsolicited Takeovers

Under certain provisions of the MGCL relating to unsolicited takeovers, a Maryland corporation with a class of equity securities registered under the Exchange Act and at least three independent directors may elect to be subject, in whole or in part, to certain statutory provisions relating to unsolicited takeovers which, among other things, would automatically classify the board of directors into three classes with staggered terms of three years each, require two-thirds of all the votes entitled to be cast by the stockholders generally in the election of directors for the removal of a director, vest in its board of directors the exclusive right to determine the number of directors and the exclusive right, by the affirmative vote of a majority of the remaining directors, to fill vacancies on the board of directors, even if the remaining directors do not constitute a quorum and require that a special meeting of stockholders be called at the request of the stockholders only if requested by stockholders entitled to cast a majority of the votes entitled to be cast at the meeting. These statutory provisions also provide that any director elected to fill a vacancy shall hold office for the remainder of the full term of the class of directors in which the vacancy occurred, rather than the next annual meeting of directors as would otherwise be the case, and until his successor is elected and qualified.

An election to be subject to any or all of the foregoing statutory provisions may be made in the Company’s charter or bylaws, or by resolution of the board of directors without the need for stockholder approval. Any such statutory provision to which the Company elects to be subject will apply even if other provisions of the Company’s charter or bylaws provide to the contrary, unless the charter or a resolution adopted by the board of directors prohibits such election.

If the Company made an election to be subject to the statutory provisions described above, the board of directors would automatically be classified into three classes with staggered terms of office of three years each, and would have the exclusive right to determine the number of directors and the exclusive right to fill vacancies on the board of directors. Moreover, any director elected to fill a vacancy would hold office for the remainder of the full term of the class of directors in which the vacancy occurred.

In such instance, the classification and staggered terms of office of the directors would make it more difficult for a third party to gain control of the board of directors since at least two annual meetings of stockholders, instead of one, generally would be required to effect a change in the majority of the board of directors.

The Company has not elected to become subject to the foregoing statutory provisions relating to unsolicited takeovers. However, the Company could by resolutions adopted by the board of directors and without stockholder approval, elect to become subject to some or all of these statutory provisions.

Amendment of the Company’s Charter and Bylaws

The Company’s charter may generally be amended only if the amendment is declared advisable by the board of directors and approved by our stockholders by the affirmative vote of at least two-thirds of the shares entitled to vote on the amendment. The Company’s bylaws generally may be amended by the affirmative vote of a majority of the board of directors or of a majority of all votes entitled to be cast by the holders of the issued and outstanding shares of common stock of the Company. However, the following bylaw provisions may be amended only by the approval of a majority of all votes entitled to be cast by the holders of the issued and outstanding shares of common stock of the Company:

• provisions opting out of the control share acquisition statute;

• provisions requiring approval by the independent directors for selection of operators of our properties or of transactions involving John B. Kilroy, Sr. and John Kilroy and their affiliates; and

• provisions governing amendment of the Company’s bylaws.

Meetings of Stockholders

The Company’s bylaws provide for annual meetings of its stockholders to elect directors and to transact other business properly brought before the meeting. In addition, a special meeting of stockholders may be called by:

• the president;

• the board of directors pursuant to a resolution approved by a majority of the entire board of directors;

• the chairman of the board; and

• the secretary of the Company following, his or her receipt of one or more written demands to call a special meeting of stockholders by holders of at least a majority of the Company’s issued and outstanding common stock entitled to vote by making a written request.

The MGCL provides that the Company’s stockholders also may act by unanimous written consent without a meeting with respect to any action that they are required or permitted to take at a meeting. To do so, each stockholder entitled to vote on the matter must sign the consent setting forth the action.

Advance Notice of Director Nominations and New Business Proposals

The Company’s bylaws provide that with respect to an annual meeting of stockholders, nominations of persons for election to the board of directors and the proposal of other business to be considered by stockholders at the meeting may be made only:

• pursuant to the Company’s notice of the meeting;

• by or at the direction of the board of directors; or

• by a stockholder who is entitled to vote at the meeting and has complied with the advance notice procedures of the Company’s bylaws.

The Company’s bylaws also provide that with respect to special meetings of stockholders, only the business specified in the notice of meeting may be brought before the meeting.

The advance notice provisions of the Company’s bylaws could have the effect of discouraging a takeover or other transaction in which holders of some, or a majority, of the shares of common stock might receive a premium for their shares over the then prevailing market price or which holders of the Company’s common stock believe is in their best interests.

Proxy Access

The Company’s bylaws permit a stockholder, or group of up to twenty stockholders, owning at least 3% of the Company’s issued and outstanding common stock continuously for at least the prior three years to nominate a candidate for election to the board of directors and inclusion in the Company’s proxy materials for its annual meeting of stockholders; provided that the total number of all stockholder nominees included in the Company’s proxy materials shall not exceed 25% of the number of directors then serving on the board of directors. The foregoing proxy access right is subject to additional eligibility, procedural and disclosure requirements set forth in the Company’s bylaws.

Exclusive Forum for Certain Litigation

The Company’s bylaws provide that, unless the Company consents in writing to the selection of an alternative forum, the Circuit Court for Baltimore City, Maryland, or, if that court does not have jurisdiction, the United States District Court for the District of Maryland, Baltimore Division, shall be the sole and exclusive forum for:

• any derivative action or proceeding brought on behalf of the Company;

• any action asserting a claim of breach of any duty owed by any present or former director or officer or other employee or stockholder of the Company to the Company or the Company’s stockholders or any standard of conduct applicable to the directors of the Company;

• any action asserting a claim against the Company or any present or former director or officer or other employee of the Company arising pursuant to any provision of the MGCL, the Company’s charter or bylaws (in each case, as the same may be amended from time to time); or

• any action asserting a claim against the Company or any present or former director or officer or other employee of the Company governed by the internal affairs doctrine.

Dissolution of the Company

Under the MGCL, the Company may be dissolved if a majority of the entire board of directors declares by resolution that dissolution is advisable and submits a proposal for dissolution for consideration at any annual or special meeting of stockholders, and this proposal is approved, by the vote of the holders of two-thirds of the shares of the Company’s capital stock entitled to vote on the dissolution.

Indemnification and Limitation of Liability of Directors and Officers

The Company’s charter and bylaws, and the partnership agreement, provide for indemnification of its officers and directors against liabilities to the fullest extent permitted by the MGCL, as amended from time to time.

The MGCL permits the Company to indemnify its present and former directors and officers and other parties against judgments, penalties, fines, settlements, and reasonable expenses actually incurred by them in connection with any proceeding to which they may be made or threatened to be made a party to, or witness in, by reason of their service in those or other capacities unless it is established that:

• the act or omission of the director or officer was material to the matter giving rise to the proceeding and was committed in bad faith or was the result of active and deliberate dishonesty;

• the director or officer actually received an improper personal benefit in money, property or services; or

• in the case of any criminal proceeding, the director or officer had reasonable cause to believe that the act or omission was unlawful.

If the proceeding is one by the Company or in its right, indemnification may not be made in respect of any proceeding in which the director or officer has been found to be liable to the Company. In addition, the Company may not indemnify a director or officer in any proceeding charging improper personal benefit to them if they were

found to be liable on the basis that personal benefit was received. The termination of any proceeding by judgment, order or settlement does not create a presumption that the director or officer did not meet the requisite standard of conduct required for indemnification to be permitted. The termination of any proceeding by conviction, or upon a plea of nolo contendere or its equivalent, or an entry of any order of probation prior to judgment, creates a rebuttable presumption that the director or officer did not meet the requisite standard of conduct required for indemnification to be permitted.

In addition, the MGCL provides that, unless limited by its charter, a corporation shall indemnify any present or former director or officer who is made a party to any proceeding by reason of service in that capacity against reasonable expenses incurred by the director or officer in connection with the proceeding, in the event that the director or officer is successful, on the merits or otherwise, in the defense of the proceeding. The Company’s charter contains no such limitation.

As permitted by the MGCL, the Company’s charter limits the liability of its directors and officers to the Company and its stockholders for money damages, subject to specified restrictions. However, the liability of the Company’s directors and officers to it and its stockholders for money damages is not limited if:

• it is proved that the director or officer actually received an improper benefit or profit in money, property or services; or

• a judgment or other final adjudication adverse to the director or officer is entered in a proceeding based on a finding that the director’s or officer’s action, or failure to act, was the result of active and deliberate dishonesty and was material to the cause of action adjudicated in the proceeding.

This provision does not limit the Company’s ability or its stockholders’ ability to obtain other relief, such as an injunction or rescission.

The partnership agreement provides that the Company, as general partner, and its officers and directors are indemnified to the same extent its officers and directors are indemnified in its charter. The partnership agreement limits the Company’s liability and the liability of its officers and directors to the operating partnership and its partners to the same extent that its charter limits the liability of its officers and directors to it and its stockholders. See “Description of Material Provisions of the Partnership Agreement of Kilroy Realty, L.P.-Indemnification of the Company’s Officers and Directors.”

Insofar as the foregoing provisions permit indemnification of directors, officers or persons controlling the Company for liability arising under the Securities Act of 1933, as amended, the Securities Act, the Company has been informed that in the opinion of the SEC, this indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

Anti-takeover Effect of Certain Provisions of the MGCL and of the Company’s Charter and Bylaws

If the resolution of the board of directors exempting the Company from the business combination provisions of the MGCL and the applicable provision in its bylaws exempting it from the control share acquisition provisions of the MGCL are rescinded or revoked (which in each case would require stockholder approval) or it elects to be subject to the unsolicited takeover provisions of the MGCL, then the business combination, control share acquisition and unsolicited takeover provisions of the MGCL, the provisions of its charter on removal of directors, the advance notice provisions of its bylaws and certain other provisions of its charter and bylaws and the MGCL could delay, deter or prevent a change of control of the Company or other transactions that might involve a premium price for holders of its capital stock or otherwise be in their best interest.

Transfer Agent and Registrar for Shares of Capital Stock

Computershare Shareowner Services LLC is the transfer agent and registrar for shares of the Company’s common stock.

EX-4.VI2

Exhibit 4.(vi)2

DESCRIPTION OF COMMON UNITS REPRESENTING LIMITED PARTNERSHIP INTERESTS OF KILROY REALTY, L.P.

The following is a summary of some of the terms and provisions of the common units representing limited partnership interests of Kilroy Realty, L.P. (“common units”). The following description does not purport to be complete and is subject to, and qualified in its entirety by reference to, the provisions of the Seventh Amended and Restated Agreement of Limited Partnership (the “partnership agreement”), a copy of which has been filed as an exhibit to the Annual Report on Form 10-K to which this “Description of Common Units Representing Limited Partnership Interests Of Kilroy Realty, L.P.” is an exhibit. As used in this “Description of Common Units Representing Limited Partnership Interests Of Kilroy Realty, L.P.,” references to the “operating partnership” refer to Kilroy Realty, L.P., references to the “Company,” “we,” “our” or “us” refer solely to Kilroy Realty Corporation and not to any of its subsidiaries, unless otherwise expressly stated or the context otherwise requires.

Common Limited Partnership Units

General

The partnership agreement provides that, subject to the distribution preferences of any preferred units that may be issued in the future, common units are entitled to receive quarterly distributions of available cash on a pro rata basis in accordance with their respective percentage interests. As of December 31, 2019, 2,023,287 issued and outstanding common units were held by the operating partnership’s common limited partners, which consisted of certain non-affiliated investors and certain directors and officers of the Company.

In addition to the rights and provisions described in more detail below, the common units:

• have limited voting rights;

• do not have any conversion rights;

• do not have any sinking fund rights;

• do not generally have any appraisal rights;

• do not have any preemptive rights to subscribe for any of the operating partnership's securities; and

• are subject to restrictions on ownership and transfer.

The Company, as general partner of the operating partnership, does not have a classified board of directors.

Redemption/Exchange Rights

Common limited partners have the right to require the operating partnership to redeem part or all of their common units for cash based upon the fair market value of an equivalent number of shares of Company common stock at the time of the redemption. Alternatively, the Company may elect to acquire those common units tendered for redemption in exchange for shares of Company common stock. The Company’s acquisition will be on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of some rights, some extraordinary distributions and similar events. However, even if the Company elects not to acquire tendered common units in exchange for shares of common stock, holders of common units that are corporations or limited liability companies may require that the Company issue common stock in exchange for their common units, subject to applicable ownership limits or any other limit as provided in the Company’s charter or as otherwise determined by the board of directors, as applicable. The Company presently anticipates that the Company will elect to issue shares of common stock in exchange for common units in connection with each redemption request, rather than having the operating partnership redeem the common units for cash. With each redemption or exchange, the Company increases its percentage ownership interest in the operating partnership. Common limited partners may exercise this redemption right from time to time, in whole or in part, except when, as a consequence of shares of common stock being issued, any person’s actual or constructive stock ownership would exceed the ownership limits, or any other limit as provided in the Company’s charter or as otherwise determined by the board of directors.

Common Limited Partner Approval Rights

The partnership agreement provides that if the limited partners own at least 5% of the common units representing common partnership interests in the operating partnership, including those common units held by the Company as general partner, the Company will not, on behalf of the operating partnership and without the prior consent of the holders of more than 50% of the common units representing limited partnership interests in the operating partnership, dissolve the operating partnership, unless the dissolution or sale is incident to a merger or a sale of substantially all of the Company’s assets.

Common and Preferred Limited Partnership Interests

The operating partnership may issue both preferred limited partnership interests and common limited partnership interests. As of December 31, 2019, the operating partnership did not have any preferred units issued and outstanding. In this discussion, we refer collectively to any preferred units the operating partnership may issue in the future as “preferred units” and to the preferred units and the common units as the “units.”

Transferability of Partnership Interests

Generally, the Company may not voluntarily withdraw from or transfer or assign its interest in the operating partnership without the consent of the holders of at least 60% of the common units including the Company’s interest. The limited partners may, without the consent of the general partner, transfer, assign, sell, encumber or otherwise dispose of their units in the operating partnership to family members, affiliates (as defined under federal securities laws) and charitable organizations and as collateral in connection with certain lending transactions, and, with the consent of the general partner, may also transfer, assign or sell their units to accredited investors. In each case, the transferee must agree to assume the transferor’s obligations under the partnership agreement. This transfer is also subject to the Company’s right of first refusal to purchase the limited partner’s units for our benefit.

In addition, without the Company’s consent, limited partners may not transfer their units:

• to any person who lacks the legal capacity to own the units;

• in violation of applicable law;

• where the transfer is for only a portion of the rights represented by the units, such as the partner’s capital account or right to distributions;

• if we believe the transfer would cause the termination of the operating partnership or would cause it to no longer be classified as a partnership for federal or state income tax purposes;

• if the transfer would cause the operating partnership to become a party-in-interest within the meaning of the Employee Retirement Income Security Act of 1974, or ERISA, or would cause its assets to constitute assets of an employee benefit plan under applicable regulations;

• if the transfer would require registration under applicable federal or state securities laws;

• if the transfer could cause the operating partnership to become a “publicly traded partnership” under applicable U.S. Treasury regulations;

• if the transfer could cause the operating partnership to be regulated under the Investment Company Act of 1940 or ERISA; or

• if the transfer would adversely affect the Company’s ability to maintain its qualification as a REIT.

The Company may not engage in any “termination transaction” without the approval of at least 60% of the common units in the operating partnership, including the Company’s general partnership interest in the operating partnership. Termination transactions consist of:

• a merger;

• a consolidation or other combination with or into another entity;

• a sale of all or substantially all of the Company's assets; or

• a reclassification, recapitalization or change of the Company's outstanding equity interests.

In connection with a termination transaction, all common limited partners must either receive, or have the right to elect to receive, for each common unit an amount of cash, securities or other property equal to the product of:

• the number of shares of Company common stock into which each common unit is then exchangeable; and

• the greatest amount of cash, securities or other property paid to the holder of one share of Company common stock in consideration for one share of common stock pursuant to the termination transaction.

If, in connection with a termination transaction, a purchase, tender or exchange offer is made to holders of Company common stock, and the common stockholders accept the purchase, tender or exchange offer, each holder of common units must either receive, or must have the right to elect to receive, the greatest amount of cash, securities or other property which that holder would have received if immediately prior to the purchase, tender or exchange offer it had exercised its right to redeem common units, received shares of Company common stock in exchange for its common units, and accepted the purchase, tender or exchange offer.

The Company also may merge or otherwise combine its assets with another entity with the approval of at least 60% of the common units if:

• substantially all of the assets directly or indirectly owned by the surviving entity (other than partnership units held by the Company) are owned directly or indirectly by the operating partnership or another limited partnership or limited liability company which is the surviving entity (any such surviving limited partnership or limited liability company is called the “surviving partnership”) of a merger, consolidation or combination of assets with the operating partnership;

• the common limited partners own a percentage interest of the surviving partnership based on the relative fair market value of the net assets of the operating partnership and the other net assets of the surviving partnership immediately prior to the consummation of this transaction;

• the rights, preferences and privileges of the common limited partners in the surviving partnership are at least as favorable as those in effect immediately prior to the consummation of the transaction and as those applicable to any other limited partners or non-managing members of the surviving partnership; and

• the common limited partners have the right to exchange their interests in the surviving partnership for either:

▪ the consideration available to the common limited partners pursuant to the preceding paragraph; or

▪ if the ultimate controlling person of the surviving partnership has publicly traded common equity securities, shares of those common equity securities, at an exchange ratio based on the relative fair market value of those securities and the Company’s common stock.

The board of directors of the Company, in the Company’s capacity as general partner, will reasonably determine relative fair market values and rights, preferences and privileges of the limited partners as of the time of the termination transaction. These values may not be less favorable to the limited partners than the relative values reflected in the terms of the termination transaction.

The Company must use commercially reasonable efforts to structure termination transactions to avoid causing the common limited partners to recognize gain for federal income tax purposes by virtue of the occurrence of or their participation in the termination transaction. In addition, the operating partnership must use commercially reasonable efforts to cooperate with the common limited partners to minimize any taxes payable in connection with any repayment, refinancing, replacement or restructuring of indebtedness, or any sale, exchange or other disposition of its assets.

Issuance of Additional Units Representing Partnership Interests

As sole general partner of the operating partnership, the Company has the ability to cause the operating partnership to issue additional units representing general and limited partnership interests. These units may include units representing preferred limited partnership interests.

Capital Contributions by the Company to the Operating Partnership

The Company may borrow additional funds in excess of the funds available from borrowings or capital contributions from a financial institution or other lender or through public or private debt offerings. The Company may then lend these funds to the operating partnership on the same terms and conditions that applied to the Company. In some cases, the Company may instead contribute these funds as an additional capital contribution to the operating partnership and increase its interest in the operating partnership and decrease the interests of the limited partners.

Tax Matters that Affect the Operating Partnership

The Company has the authority under the partnership agreement to make tax elections under the Code on the operating partnership’s behalf.

Allocations of Net Income and Net Losses to Partners

The net income of the operating partnership will generally be allocated:

• first, to the extent holders of units have been allocated net losses, net income shall be allocated to such holders to offset these losses, in an order of priority which is the reverse of the priority of the allocation of these losses;

• next, pro rata among holders of any preferred units ranking on a parity as to distributions in an amount equal to a specified return on the stated value of such other series of preferred units as set forth in the terms of such preferred units, which are referred to as the “preferred returns”; and

• the remaining net income, if any, will be allocated to the Company and to the common limited partners in accordance with their respective percentage interests.

Net losses of the operating partnership will generally be allocated:

•  first, to the Company and the common limited partners in accordance with their respective percentage interests, but only to the extent the allocation does not cause a partner to have a negative adjusted capital account (ignoring any limited partner capital contribution obligations);

• next, pro rata among the holders of any preferred units that the operating partnership may issue in the future, but only to the extent that the allocation does not cause a partner to have a negative adjusted capital account (ignoring any limited partner capital contribution obligations);

• next, to partners pro rata in proportion to their positive adjusted capital accounts, until such capital accounts are reduced to zero; and

• the remainder, if any, will be allocated to the Company.

Notwithstanding the foregoing, the partnership agreement generally provides that the operating partnership’s adjusted net income (as defined in the partnership agreement) will first be allocated to the holders of any preferred units that the operating partnership may issue in the future to the extent of their preferred returns, with the remaining items of net income or net loss allocated according to the provisions described above. The allocations described above are subject to compliance with the provisions of Sections 704(b) and 704(c) of the Code and the associated Treasury regulations.

Operations and Management of the Operating Partnership

The operating partnership must be operated in a manner that will enable the Company to maintain its qualification as a REIT and avoid any federal income tax liability. The partnership agreement provides that the Company will determine from time to time, but not less frequently than quarterly, the net operating cash revenues of

the operating partnership, as well as net sales and refinancing proceeds, pro rata in accordance with the partners respective percentage interests, subject to the distribution preferences with respect to any preferred units that the operating partnership may issue in the future. The partnership agreement further provides that the operating partnership will assume and pay when due, or reimburse the Company for payment of, all expenses that the Company incurs relating to the ownership and operation of, or for the benefit of, the operating partnership and all costs and expenses relating to the Company’s operations.

Term of the Partnership Agreement

The operating partnership will continue in full force and effect until December 31, 2095, or until sooner dissolved in accordance with the terms of the partnership agreement.

EX-10.19

Exhibit 10.19

January 31, 2020

Jeffrey C. Hawken

c/o Kilroy Realty Corporation

12200 W. Olympic Boulevard, Suite 200

Los Angeles, CA 90064

Re: Extension of Employment Agreement

Dear Jeff:

Reference is made to that certain Employment Agreement between you, Kilroy Realty Corporation, a Maryland corporation, and Kilroy Realty, L.P., a Delaware limited partnership, amended and restated effective as of December 31, 2015, and as subsequently amended by a letter agreement by and between such parties dated February 28, 2019 (the “Employment Agreement”). This letter is to confirm our agreement that the term of the Employment Agreement (as provided in Section 2 of the Employment Agreement) will be extended by one year so that the Term (as defined in the Employment Agreement) will end on March 1, 2021 (subject to earlier termination as provided in Sections 6 and 7 of the Employment Agreement, and subject to any further extension that may mutually be agreed to in writing).

Except as expressly set forth herein, the Employment Agreement shall remain in full force and effect in accordance with its current terms. This letter may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

[Remainder of page left blank]

If this letter accurately sets forth our agreement with respect to the foregoing matters, please sign this letter where indicated below and return it to me.

	KILROY REALTY CORPORATION
By:	/s/ Tyler H. Rose
	Name: Tyler H. Rose Title: Executive Vice President and Chief Financial Officer
By:	/s/ Heidi R. Roth
	Name: Heidi R. Roth Title: Executive Vice President and Chief Administrative Officer
	KILROY REALTY, L.P.
By:	KILROY REALTY CORPORATION
	Its: General Partner
By:	/s/ Tyler H. Rose
	Name: Tyler H. Rose Title: Executive Vice President and Chief Financial Officer
By:	/s/ Heidi R. Roth
	Name: Heidi R. Roth Title: Executive Vice President and Chief Administrative Officer

Accepted and Agreed:

/s/ Jeffrey C. Hawken

Jeffrey C. Hawken

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF KILROY REALTY CORPORATION

NAME OF SUBSIDIARY OR ORGANIZATION	STATE OF INCORPORATION OR FORMATION
Kilroy Realty, L.P.	Delaware
Kilroy Realty Finance, Inc.	Delaware
Kilroy Realty Finance Partnership, L.P.	Delaware
Kilroy Services, LLC	Delaware
Kilroy Realty TRS, Inc.	Delaware
Kilroy Realty Management, L.P.	Delaware
Kilroy Realty 303, LLC	Delaware
KR Westlake Terry, LLC	Delaware
KR 6255 Sunset, LLC	Delaware
KR MML 12701, LLC	Delaware
KR 690 Middlefield, LLC	Delaware
KR Lakeview, LLC	Delaware
KR Tribeca West, LLC	Delaware
KR 331 Fairchild, LLC	Delaware
KR Hollywood, LLC	Delaware
KR 350 Mission, LLC	Delaware
Fremont Lake Union Center, LLC	Delaware
KR 555 Mathilda, LLC	Delaware
KR Redwood City Member, LLC	Delaware
Redwood City Partners, LLC	Delaware
KR Vine, LLC	Delaware
KR 401 Terry, LLC	Delaware
KR Mission Bay, LLC	Delaware
KR Flower Mart, LLC	Delaware
KR SFFGA, LLC	Delaware
KR CFM, Inc.	California
KR 333 Dexter, LLC	Delaware
KR 330 Dexter, LLC	Delaware
KR 400 Aurora, LLC	Delaware
KR 401 Dexter, LLC	Delaware
KR 100 Hooper, LLC	Delaware
100 First Street Member, LLC	Delaware
KR 100 First Street Owner, LLC	Delaware
201 Third Street Member, LLC	Delaware
KR 201 Third Street Owner, LLC	Delaware
303 Second Street Member, LLC	Delaware
KR 303 Second Street Owner, LLC	Delaware
KR Terra Bella, LLC	Delaware
KR Menlo Park, LLC	Delaware
KR WMC, LLC	Delaware
KR 501 Santa Monica, LLC	Delaware
KR 12400 High Bluff, LLC	Delaware
KR Chesapeake Commons, LLC	Delaware
KR Sunset Weho, LLC	Delaware
KR 1701 Page Mill, LLC	Delaware
KR Oyster Point Developer, LLC	Delaware
KR Crescent Beach, LLC	Delaware
KR Kettner, LLC	Delaware
Oyster Cove Marina Owner, LLC	Delaware
Oyster Cove Marina Owner Member, LLC	Delaware

KR OP Tech, LLC	Delaware
KR North PCH, LLC	Delaware
Kilroy Realty TRS 2, Inc.	Delaware
KR Oyster Point I, LLC	Delaware
KR Oyster Point II, LLC	Delaware
KR Oyster Point III, LLC	Delaware
Kilroy Realty TRS 3, Inc.	Delaware
KR 6th Ave, LLC	Delaware
KR 901 Park, LLC	Delaware
KR 1335 Broadway, LLC	Delaware
KR 1825 7th Ave, LLC	Delaware
KR Blackwelder, LLC	Delaware
KR Blackwelder Lessee, LLC	Delaware
KR Boardman, LLC	Delaware
901 16th St, LLC	Delaware
901 16th St Manager, LLC	Delaware
901 16th St Member, LLC	Delaware

EX-21.2

Exhibit 21.2

SUBSIDIARIES OF KILROY REALTY, L.P.

NAME OF SUBSIDIARY OR ORGANIZATION	STATE OF INCORPORATION OR FORMATION
Kilroy Realty Finance Partnership, L.P.	Delaware
Kilroy Services, LLC	Delaware
Kilroy Realty TRS, Inc.	Delaware
Kilroy Realty Management, L.P.	Delaware
Kilroy Realty 303, LLC	Delaware
KR Westlake Terry, LLC	Delaware
KR 6255 Sunset, LLC	Delaware
KR MML 12701, LLC	Delaware
KR 690 Middlefield, LLC	Delaware
KR Lakeview, LLC	Delaware
KR Tribeca West, LLC	Delaware
KR 331 Fairchild, LLC	Delaware
KR Hollywood, LLC	Delaware
KR 350 Mission, LLC	Delaware
Fremont Lake Union Center, LLC	Delaware
KR 555 Mathilda, LLC	Delaware
KR Redwood City Member, LLC	Delaware
Redwood City Partners, LLC	Delaware
KR Vine, LLC	Delaware
KR 401 Terry, LLC	Delaware
KR Mission Bay, LLC	Delaware
KR Flower Mart, LLC	Delaware
KR SFFGA, LLC	Delaware
KR 333 Dexter, LLC	Delaware
KR 330 Dexter, LLC	Delaware
KR 400 Aurora, LLC	Delaware
KR 401 Dexter, LLC	Delaware
KR 100 Hooper, LLC	Delaware
100 First Street Member, LLC	Delaware
KR 100 First Street Owner, LLC	Delaware
201 Third Street Member, LLC	Delaware
KR 201 Third Street Owner, LLC	Delaware
303 Second Street Member, LLC	Delaware
KR 303 Second Street Owner, LLC	Delaware
KR Terra Bella, LLC	Delaware
KR Menlo Park, LLC	Delaware
KR WMC, LLC	Delaware
KR 501 Santa Monica, LLC	Delaware
KR 12400 High Bluff, LLC	Delaware
KR Chesapeake Commons, LLC	Delaware
KR Sunset Weho, LLC	Delaware
KR 1701 Page Mill, LLC	Delaware
KR Oyster Point Developer, LLC	Delaware
KR Crescent Beach, LLC	Delaware
KR Kettner, LLC	Delaware
Oyster Cove Marina Owner, LLC	Delaware
Oyster Cove Marina Owner Member, LLC	Delaware
KR OP Tech, LLC	Delaware
KR North PCH, LLC	Delaware
Kilroy Realty TRS 2, Inc.	Delaware

KR Oyster Point I, LLC	Delaware
KR Oyster Point II, LLC	Delaware
KR Oyster Point III, LLC	Delaware
KR Boardman, LLC	Delaware
Kilroy Realty TRS 3, Inc.	Delaware
KR 901 Park, LLC	Delaware
KR 1335 Broadway, LLC	Delaware
KR Blackwelder, LLC	Delaware
KR Blackwelder Lessee, LLC	Delaware
KR 1825 7th Ave, LLC	Delaware
KR 6th Ave, LLC	Delaware
901 16th St, LLC	Delaware
901 16th St Member, LLC	Delaware
901 16th St Manager, LLC	Delaware

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-233822 on Form S-3 and Registration Statement No. 333-218241 on Form S-8 of our reports dated February 13, 2020, relating to the financial statements of Kilroy Realty Corporation and the effectiveness of Kilroy Realty Corporation’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Kilroy Realty Corporation and Kilroy Realty, L.P. for the year ended December 31, 2019.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

EX-23.2

Exhibit 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-233822-01 on Form S-3 of our reports dated February 13, 2020, relating to the financial statements of Kilroy Realty, L.P. and the effectiveness of Kilroy Realty, L.P.’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Kilroy Realty, L.P. and Kilroy Realty Corporation for the year ended December 31, 2019.

/s/ DELOITTE & TOUCHE LLP

Los Angeles, California

February 13, 2020

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John Kilroy, certify that:

1. I have reviewed this annual report on Form 10-K of Kilroy Realty Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John Kilroy

John Kilroy

President and Chief Executive Officer

Date: February 13, 2020

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose, certify that:

1. I have reviewed this annual report on Form 10-K of Kilroy Realty Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Tyler H. Rose

Tyler H. Rose

Executive Vice President and Chief Financial Officer

Date: February 13, 2020

EX-31.3

Exhibit 31.3

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John Kilroy, certify that:

1. I have reviewed this annual report on Form 10-K of Kilroy Realty, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John Kilroy

John Kilroy

President and Chief Executive Officer

Kilroy Realty Corporation, sole general partner of

  Kilroy Realty, L.P.

Date: February 13, 2020

EX-31.4

Exhibit 31.4

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose, certify that:

1. I have reviewed this annual report on Form 10-K of Kilroy Realty, L.P.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's Board of Directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

/s/ Tyler H. Rose

Tyler H. Rose

Executive Vice President and Chief Financial Officer

Kilroy Realty Corporation, sole general partner of

Kilroy Realty, L.P.

Date: February 13, 2020

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i) the accompanying Annual Report on Form 10-K of the Company for the year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ John Kilroy
John Kilroy
President and Chief Executive Officer
Date:	February 13, 2020

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i) the accompanying Annual Report on Form 10-K of the Company for the year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Tyler H. Rose
Tyler H. Rose
Executive Vice President and Chief Financial Officer
Date:	February 13, 2020

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the “Operating Partnership”), hereby certifies, to his knowledge, that:

(i) the accompanying Annual Report on Form 10-K of the Operating Partnership for the year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ John Kilroy
John Kilroy
President and Chief Executive Officer
Kilroy Realty Corporation, sole general partner of Kilroy Realty, L.P.
Date:	February 13, 2020

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the “Operating Partnership”), hereby certifies, to his knowledge, that:

(i) the accompanying Annual Report on Form 10-K of the Operating Partnership for the year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ Tyler H. Rose
Tyler H. Rose
Executive Vice President and Chief Financial Officer
Kilroy Realty Corporation, sole general partner of Kilroy Realty, L.P.
Date:	February 13, 2020

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Receivables

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Receivables

Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Current receivables	$	27,660		$	24,815
Allowance for uncollectible tenant receivables (1)	(1,171		)	(4,639		)
Current receivables, net	$	26,489		$	20,176

_______________

(1) Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for uncollectible tenant receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for uncollectible tenant receivables.

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred rent receivables	$	339,489		$	270,346
Allowance for deferred rent receivables (1)	(1,552		)	(3,339		)
Deferred rent receivables, net	$	337,937		$	267,007

_______________

(1)

Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for deferred rent receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for deferred rent receivables.Other Significant Events

During the year ended December 31, 2019, we recorded a $2.9 million net increase in rental income on our consolidated statements of operations primarily due to a $4.2 million increase in revenue related to the improved credit quality of a tenant for which we previously recorded a bad debt reserve during the year ended December 31, 2018, partially offset by a $1.3 million decrease in revenue for other tenants with diminished credit quality during the year ended December 31, 2019.

During the year ended December 31, 2018, we recognized $5.7 million of provision for bad debts. The provision for bad debts was primarily due to a $7.0 million provision for one tenant recognized during the second quarter of 2018, partially offset by a $1.4 million decrease in the provision for bad debts for one lease due to the assignment of the lease to a credit tenant during the second quarter of 2018.

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
REAL ESTATE ASSETS
Land and improvements	$ 1,466,166	$ 1,160,138
Buildings and improvements	5,866,477	5,207,984
Undeveloped land and construction in progress	2,296,130	2,058,510
Total real estate assets held for investment	9,628,773	8,426,632
Accumulated depreciation and amortization	(1,561,361)	(1,391,368)
Total real estate assets held for investment, net	8,067,412	7,035,264
CASH AND CASH EQUIVALENTS (Note 23)	60,044	51,604
RESTRICTED CASH (Notes 3, 4 and 23)	16,300	119,430
MARKETABLE SECURITIES (Notes 16 and 19)	27,098	21,779
CURRENT RECEIVABLES, NET (Notes 2, 6 and 20)	26,489	20,176
DEFERRED RENT RECEIVABLES, NET (Notes 2, 6 and 20)	337,937	267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	212,805	197,574
RIGHT OF USE GROUND LEASE ASSETS (Notes 2 and 18)	96,348
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	55,661	52,873
TOTAL ASSETS	8,900,094	7,765,707
LIABILITIES:
Secured debt, net (Notes 8, 9 and 19)	258,593	335,531
Unsecured debt, net (Notes 8, 9 and 19)	3,049,185	2,552,070
Unsecured line of credit (Notes 8, 9 and 19)	245,000	45,000
Accounts payable, accrued expenses and other liabilities (Note 18)	418,848	374,415
Ground lease liabilities (Notes 2 and 18)	98,400
Accrued dividends and distributions (Notes 13 and 28)	53,219	47,559
Deferred revenue and acquisition-related intangible liabilities, net (Notes 3, 5 and 10)	139,488	149,646
Rents received in advance and tenant security deposits	66,503	60,225
Total liabilities	4,329,236	3,564,446
COMMITMENTS AND CONTINGENCIES (Note 18)
Stockholders’ Equity (Note 13):
Common stock, $.01 par value, 150,000,000 shares authorized, 106,016,287 and 100,746,988 shares issued and outstanding, respectively	1,060	1,007
Additional paid-in capital	4,350,917	3,976,953
Distributions in excess of earnings	(58,467)	(48,053)
Total stockholders’ equity	4,293,510	3,929,907
Noncontrolling Interests (Notes 2 and 11):
Common units of the Operating Partnership	81,917	78,991
Noncontrolling interests in consolidated property partnerships	195,431	192,363
Total noncontrolling interests	277,348	271,354
Total equity	4,570,858	4,201,261
TOTAL LIABILITIES AND EQUITY/CAPITAL	$ 8,900,094	$ 7,765,707

XML

Schedule III - Real Estate and Accumulated Depreciation - Historical Cost Real Estate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]
Total real estate held for investment, beginning of year	$ 8,426,632	$ 7,417,777	$ 7,060,754
Acquisitions	460,512	581,671	19,829
Improvements, etc.	890,654	724,016	533,939
Total additions during period	1,351,166	1,305,687	553,768
Cost of real estate sold	(120,788)	(286,623)	(191,610)
Other	(28,237)	(10,209)	(5,135)
Total deductions during period	(149,025)	(296,832)	(196,745)
Total real estate held for investment, end of year	$ 9,628,773	$ 8,426,632	$ 7,417,777

XML

CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.375	$ 0.375	$ 1.91000	$ 1.79	$ 1.65

XML

Subsequent Events - Narrative (Details) - USD ($) $ in Millions	Jan. 31, 2020	Jan. 15, 2020	Dec. 31, 2019
Kilroy Realty 2006 Incentive Award Plan [Member]
Subsequent Event [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant			400,000
Subsequent event [Member]
Subsequent Event [Line Items]
Payments of dividends		$ 53.2
Subsequent event [Member] | Kilroy Realty 2006 Incentive Award Plan [Member] | Time-Based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Subsequent Event [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant	109,359
Subsequent event [Member] | Kilroy Realty 2006 Incentive Award Plan [Member] | Market measure-based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Subsequent Event [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant	154,267
Recognition period	3 years

XML

Basis of Presentation and Significant Accounting Policies

12 Months Ended

Dec. 31, 2019

Basis of Presentation and Significant Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

Partially Owned Entities and Variable Interest Entities

At December 31, 2019 the consolidated financial statements of the Company included four VIEs in addition to the Operating Partnership: two of the consolidated property partnerships, 100 First LLC, 303 Second LLC, and two entities established during the fourth quarter of 2019 to facilitate potential future Section 1031 Exchanges. At December 31, 2019, the Company and the Operating Partnership were determined to be the primary beneficiaries of these four VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. As of December 31, 2019, the four VIEs’ total assets, liabilities and noncontrolling interests included on our consolidated balance sheet were approximately $676.7 million (of which $598.0 million related to real estate held for investment), approximately $40.1 million and approximately $189.6 million, respectively. Revenues, income and net assets generated by 100 First LLC and 303 Second LLC may only be used to settle their contractual obligations, which primarily consist of operating expenses, capital expenditures and required distributions.

At December 31, 2018, the consolidated financial statements of the Company included three VIEs in addition to the Operating Partnership: two of the consolidated property partnerships, 100 First LLC and 303 Second LLC, and an entity established during the fourth quarter of 2018 to facilitate a Section 1031 Exchange. At December 31, 2018, the Company and the Operating Partnership were determined to be the primary beneficiaries of these three VIEs since we had the ability to control the activities that most significantly impact each of the VIEs’ economic performance. At December 31, 2018, the three VIEs’ total assets, liabilities and noncontrolling interests included on our consolidated balance sheet were approximately $615.4 million (of which $543.9 million related to real estate held for investment on our consolidated balance sheet), approximately $45.1 million and approximately $186.4 million, respectively. In January 2019, the Section 1031 Exchange was successfully completed and the related VIE was terminated.

Our accounting policy is to consolidate entities in which we have a controlling financial interest and significant decision making control over the entity's operations. In determining whether we have a controlling financial interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, size of our investment (including loans), authority to control decisions, and contractual and substantive participating rights of the members. In addition to evaluating control rights, we consolidate entities in which the other members have no substantive kick-out rights to remove the Company as the managing member.

Entities in which the equity investors do not have sufficient equity at risk to finance their endeavors without additional financial support or the holders of the equity investment at risk do not have a controlling financial interest are VIEs. We evaluate whether an entity is a VIE and whether we are the primary beneficiary. We are deemed to be the primary beneficiary of a VIE when we have the power to direct the activities of the VIE that most significantly impact the VIEs’ economic performance and the obligation to absorb losses or receive benefits that could potentially be significant to the VIE.

If the requirements for consolidation are not met, the Company would account for investments under the equity method of accounting if we have the ability to exercise significant influence over the entity. Equity method investments would be initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period. The Company did not have any equity method investments at December 31, 2019 or 2018.

Accounting Pronouncements Adopted January 1, 2019

Effective January 1, 2019, we adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-02 “Leases (Topic 842)” (“Topic 842”) and the related FASB ASU Nos. 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01 which provide practical expedients, technical corrections and improvements for certain aspects of ASU 2016-02, on a modified retrospective basis. Topic 842 establishes a single comprehensive model for entities to use in accounting for leases and supersedes the existing leasing guidance. We evaluated each of the Company’s contracts to determine if the contract is or contains a lease and concluded that Topic 842 is applicable to the Company as a lessor in its tenant lease agreements and as a lessee in its ground leases.

Lessor Accounting

As a lessor, the Company’s leases with tenants for its real estate assets generally provide for the lease of space, as well as common area maintenance and parking. Under Topic 842, the lease of space is considered a lease component while the common area maintenance billings and tenant parking are considered nonlease components, which fall under revenue recognition guidance in FASB Accounting Standards Codification Topic 606 “Revenue from Contracts with Customers” (“Topic 606”). However, upon adopting the guidance in Topic 842, the Company determined that its tenant leases met the criteria to apply the practical expedient provided by ASU 2018-11 to recognize the lease and non-lease components together as one single component. This conclusion was based on the consideration that 1) the timing and pattern of transfer of the nonlease components and associated lease component are the same, and 2) the lease component, if accounted for separately, would be classified as an operating lease. As the lease of space is the predominant component of the Company’s leasing arrangements, we accounted for all lease and non-lease components as one single component under Topic 842. As a result, the adoption of Topic 842 did not have any impact on the Company’s timing or pattern of recognition of rental revenues as compared to previous guidance. Transient daily parking revenue is accounted for under the guidance in Topic 606 and included in other property income in our consolidated statements of operations.

To reflect their recognition as one lease component, base rental revenues, additional rental revenues (which consist of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs) and other lease related property income related to leases that also meet the requirements of the practical expedient provided by ASU 2018-11 have been combined in one line item subsequent to the adoption of Topic 842 for the year ended December 31, 2019 in rental income on the Company’s consolidated statements of operations. In addition, under Topic 842, lessor costs for certain services directly reimbursed by tenants, which were previously presented on a net basis under previous guidance, are required to be presented on a gross basis in revenues and expenses. During the year ended December 31, 2019, we incurred additional property expenses of $13.9 million for which we were reimbursed, that were not required to be grossed up under the previous guidance. We presented this amount on a gross basis within rental income and property expenses in the Company’s consolidated statements of operations as a result of the adoption, which had no impact on net income.

Our rental income is mostly comprised of fixed contractual payments defined under the lease that, in most cases, escalate annually over the term of the lease at fixed rates. Additionally, rental income includes variable payments for tenant reimbursements of property-related expenses and payments based on a percentage of tenant’s sales. The table below sets forth the allocation of rental income between fixed and variable payments for the year ended December 31, 2019:

	Year Ended
	December 31, 2019
	(in thousands)
Fixed lease payments	$	710,557
Variable lease payments	115,915
Total rental income	$	826,472

Upon the adoption of Topic 842 on January 1, 2019, the method for recognizing revenue includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. For leases that are deemed probable of collection, revenue is recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination. Refer to our Significant Accounting Policies below for further discussion of our revenue recognition and allowance for uncollectible tenant and deferred rent receivables policies.

Leasing Costs

Upon adoption of Topic 842, the Company elected to apply the package of practical expedients provided and did not reassess the following as of January 1, 2019: 1) whether any expired or existing contracts are or contain leases; 2) the lease classification for any expired or existing leases; and 3) initial direct costs for any existing leases. Under Topic 842, initial direct costs for both lessees and lessors would include only those costs that are incremental to the arrangement and would not have been incurred if the lease had not been obtained. As a result, beginning January 1, 2019, the

Company no longer capitalized internal leasing costs and third-party legal leasing costs and instead expensed these costs as incurred. These expenses are included in leasing costs and general and administrative expenses on our consolidated statements of operations in 2019. During the year ended December 31, 2019, the Company expensed approximately $11.4 million of indirect leasing costs which would have been capitalized prior to the adoption of Topic 842.

The election of the package of practical expedients described above permits us to continue to account for our leases that commenced before January 1, 2019 under the previously existing lease accounting guidance for the remainder of their lease terms, and to apply the new lease accounting guidance to leases commencing or modified after January 1, 2019. On January 1, 2019, we recognized a $3.1 million cumulative-effect adjustment, primarily related to internal leasing costs and legal leasing costs for tenant leases that had not commenced prior to that date, to increase distributions in excess of earnings for the Company and partners’ capital for the Operating Partnership in connection with our adoption of Topic 842.

Lessee Accounting

The Company’s ground leases are the primary contracts in which we are the lessee. Upon adoption of Topic 842 on January 1, 2019, the Company had four existing ground leases which were classified as operating leases. As discussed above, the Company elected to apply the package of practical expedients provided by Topic 842 and therefore did not reassess the classification of these ground leases. Existing ground leases that commenced before the January 1, 2019 adoption date continued to be accounted for as operating leases, and the new guidance did not have a material impact on our recognition of ground lease expense or our results of operations. However, for periods beginning after January 1, 2019, we are now required to recognize a lease liability on our consolidated balance sheets equal to the present value of the minimum future lease payments required in accordance with each ground lease, as well as a right of use asset equal to the lease liability adjusted for above and below market intangibles and deferred leasing costs. To determine the discount rates used to calculate the present value of the lease payments, we used a hypothetical curve derived from unsecured corporate borrowing rates over the lease terms. The weighted average discount rate for our four existing ground leases was 5.15%. The adoption of Topic 842 resulted in the recognition of right of use ground lease assets totaling $82.9 million and ground lease liabilities totaling $87.4 million on January 1, 2019. There was no material impact to our consolidated statements of operations or consolidated statements of cash flows as a result of adoption of this new guidance. For further information related to our ground leases, refer to Note 18 “Commitments and Contingencies.”

For leases with a term of 12 months or less where we are the lessee, we made an accounting policy election by class of underlying asset not to recognize right of use lease assets and lease liabilities. We recognize lease expense for such leases generally on a straight-line basis over the lease term.

Significant Accounting Policies

Revenue Recognition

Rental revenue for office and retail operating properties is our principal source of revenue. We recognize revenue from base rent, additional rent (which consists of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs), parking and other lease-related revenue once all of the following criteria are met: (i) the agreement has been fully executed and delivered, (ii) services have been rendered, (iii) the amount is fixed or determinable and (iv) payment has been received or the collectability of the amount due is probable. Lease termination fees are amortized over the remaining lease term, if applicable. If there is no remaining lease term, they are recognized when received and realized. Minimum annual rental revenues are recognized in rental revenues on a straight-line basis over the non-cancellable term of the related lease.

Base Rent

The timing of when we commence rental revenue recognition for office and retail properties depends largely on our conclusion as to whether the Company or the tenant is the owner for accounting purposes of tenant improvements at the leased property. When we conclude that we are the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements as an asset and commence rental revenue recognition when the tenant takes possession of or controls the finished space, which is generally when tenant improvements being recorded

as our assets are substantially complete. In certain instances, when we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, rental revenue recognition begins when the tenant takes possession or controls the physical use of the leased space, which may occur in phases or for an entire building or project. The determination of who owns the tenant improvements is made on a lease-by-lease basis and has a significant effect on the timing of commencement of revenue recognition.

When we conclude that the Company is the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements, including costs paid for or reimbursed by the tenants, as a capital asset. For these tenant-funded tenant improvements, we record the amount funded by or reimbursed by tenants as deferred revenue, which is amortized and recognized as rental income on a straight-line basis over the term of the related lease.

When we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, we record our contribution towards those tenant-owned improvements as a lease incentive, which is included in deferred leasing costs and acquisition-related intangible assets, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease.

For residential properties, we commence revenue recognition upon lease commencement. Residential rental revenue is recognized on a straight-line basis over the term of the related lease, net of any concessions.

Additional Rent - Reimbursements from Tenants

Additional rent, consisting of amounts due from tenants for common area maintenance, real estate taxes and other recoverable costs, are recognized in rental income in the period the recoverable costs are incurred. Prior to the adoption of Topic 842, such amounts were recognized in revenue as tenant reimbursements. Additional rent where we pay the associated costs directly to third-party vendors and are reimbursed by our tenants are recognized and recorded on a gross basis, with the corresponding expense recognized in property expenses or real estate taxes. Prior to the adoption of Topic 842, recoverable costs were generally recognized and recorded on a gross basis when we were the primary obligor with respect to purchasing goods and services from third-party suppliers, had discretion in selecting the supplier, and had credit risk.

Other Property Income

Other property income primarily includes amounts recorded in connection with transient daily parking, tenant bankruptcy settlement payments, broken deal income and property damage settlement related payments. Other property income also includes miscellaneous income from tenants, restoration fees and fees for late rental payments. Amounts recorded within other property income fall within the scope of Topic 606 and are recognized as revenue at the point in time when control of the goods or services transfers to the customer and our performance obligation is satisfied.

Uncollectible Lease Receivables and Allowances for Tenant and Deferred Rent Receivables

We carry our current and deferred rent receivables net of allowances for amounts that may not be collected. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations. Upon the adoption of Topic 842 on January 1, 2019, the allowances are increased or decreased through rental income, and our determination of the adequacy of the Company’s allowances for tenant receivables includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. Such assessment involves using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. For leases that are deemed probable of collection, revenue continues to be recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination.

For tenant and deferred rent receivables associated with leases whose rents are deemed probable of collection under Topic 842, we may record an allowance under other authoritative GAAP using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Tenant and deferred rent receivables deemed probable of collection are carried net of allowances for uncollectible accounts, with increases or decreases in the allowances recorded through rental income on our consolidated statements of operations. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations.

Current tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. With respect to the allowance for uncollectible tenant receivables, the specific identification methodology analysis relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, our assessment of the tenant’s ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant.

Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds cash rents billed to date under the lease agreement. With respect to the allowance for deferred rent receivables, given the longer-term nature of these receivables, the specific identification methodology analysis evaluates each of our significant tenants and any tenants on our internal watchlist and relies on factors such as each tenant’s financial condition and its ability to meet its lease obligations. We evaluate our reserve levels quarterly based on changes in the financial condition of tenants and our assessment of the tenant’s ability to meet its lease obligations, overall economic conditions, and the current business environment.

Acquisitions

Acquisitions of operating properties and development and redevelopment opportunities generally do not meet the definition of a business and are accounted for as asset acquisitions, as substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. For these asset acquisitions, we record the acquired tangible and intangible assets and assumed liabilities based on each asset’s and liability’s relative fair value at the acquisition date of the total purchase price plus any capitalized acquisition costs. We record the acquired tangible and intangible assets and assumed liabilities of acquisitions of operating properties and development and redevelopment opportunities that meet the accounting criteria to be accounted for as business combinations at fair value at the acquisition date. Transaction costs associated with asset acquisitions are capitalized as part of the purchase price of the acquisition.

The acquired assets and assumed liabilities for an acquisition generally include but are not limited to (i) land and improvements, buildings and improvements, undeveloped land and construction in progress and (ii) identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market operating leases and ground leases, acquired in-place lease values and tenant relationships, if any. Any debt assumed and equity (including common units of the Operating Partnership) issued in connection with a property acquisition is recorded at fair value on the date of acquisition.

The fair value of land and improvements is derived from comparable sales of land and improvements within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements and leasing costs considers the value of the property as if it was vacant as well as current replacement costs and other relevant market rate information.

The fair value of the above-market or below-market component of an acquired in-place operating lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining non-cancellable lease term and (ii) our estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition measured over the remaining non-cancellable term of the lease for above-market operating leases and the initial non-cancellable term plus the term of any below-market fixed rate renewal options, if applicable, for below-market operating leases. Our below-market operating leases generally do not include fixed rate or below-market renewal options. The amounts recorded for above-market operating leases are included in deferred leasing costs and acquisition-related intangible assets, net on the

balance sheet and are amortized on a straight-line basis as a reduction of rental income over the remaining term of the applicable leases. The amounts recorded for below-market operating leases are included in deferred revenue and acquisition-related intangible liabilities, net on the balance sheet and are amortized on a straight-line basis as an increase to rental income over the remaining term of the applicable leases plus the term of any below-market fixed rate renewal options, if applicable. The amortization of a below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented. The amortization of an above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The fair value of acquired in-place leases is derived based on our assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. The amount recorded for acquired in-place leases is included in deferred leasing costs and acquisition-related intangible assets, net on the balance sheet and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. Fully amortized intangible assets are written off each quarter.

Operating Properties

Operating properties are generally carried at historical cost less accumulated depreciation. Properties held for sale are reported at the lower of the carrying value or the fair value less estimated cost to sell. The cost of operating properties includes the purchase price or development costs of the properties. Costs incurred for the renovation and betterment of the operating properties are capitalized to our investment in that property. Maintenance and repairs are charged to expense as incurred.

When evaluating properties to be held and used for potential impairment, we first evaluate whether there are any indicators of impairment for any of our properties. If any impairment indicators are present for a specific property, we then evaluate the regional market conditions that could reasonably affect the property. If there are negative changes and trends in that regional market, we then perform an undiscounted cash flow analysis and compare the net carrying amount of the property to the property’s estimated undiscounted future cash flow over the anticipated holding period. If the estimated undiscounted future cash flow is less than the net carrying amount of the property, we perform an impairment loss calculation to determine if the fair value of the property is less than the net carrying value of the property. Our impairment loss calculation compares the net carrying amount of the property to the property’s estimated fair value, which may be based on estimated discounted future cash flow calculations or third-party valuations or appraisals. We would recognize an impairment loss if the property's net carrying amount exceeds the property's estimated fair value. If we were to recognize an impairment loss, the estimated fair value of the property becomes its new cost basis. For a depreciable long-lived asset, the new cost basis would be depreciated (amortized) over the remaining useful life of that asset.

Cost Capitalization

All costs clearly associated with the development, redevelopment and construction of a property are capitalized as project costs, including internal compensation costs. In addition, the following costs are capitalized as project costs during periods in which activities necessary to prepare development and redevelopment properties for their intended use are in progress: pre-construction costs essential to the development of the property, interest, real estate taxes and insurance.

• For office and retail development and redevelopment properties that are pre-leased, we cease capitalization when revenue recognition commences, which is upon substantial completion of tenant improvements deemed to be the Company’s asset for accounting purposes.

• For office and retail development and redevelopment properties that are not pre-leased, we may not immediately build out the tenant improvements. Therefore, we cease capitalization when revenue recognition commences upon substantial completion of the tenant improvements deemed to be the Company's asset for accounting purposes, but in any event, no later than one year after the cessation of major construction activities. We also cease capitalization on a development or redevelopment property when activities necessary to prepare the property for its intended use have been suspended.

• For office and retail development or redevelopment properties with multiple tenants and staged leasing, we cease capitalization and begin depreciation on the portion of the development or redevelopment property for which revenue recognition has commenced.

• For residential development properties, we cease capitalization when the property is substantially complete and available for occupancy.

Once major base building construction activities have ceased and the development or redevelopment property or phases of the development or redevelopment project is placed in service, which may occur in phases or for an entire building or project, the costs capitalized to construction in progress are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets as the historical cost of the property.

Depreciation and Amortization of Buildings and Improvements

The costs of buildings and improvements and tenant improvements are depreciated using the straight-line method of accounting over the estimated useful lives set forth in the table below. Depreciation expense for buildings and improvements for the three years ended December 31, 2019, 2018, and 2017 was $211.9 million, $198.6 million, and $190.5 million, respectively.

Asset Description	Depreciable Lives
Buildings and improvements	25 – 40 years
Tenant improvements	1 – 20 years (1)

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(1) Tenant improvements are amortized over the shorter of the lease term or the estimated useful life. 

Real Estate Assets Held for Sale, Dispositions and Discontinued Operations

A real estate asset is classified as held for sale when certain criteria are met, including but not limited to the availability of the asset for immediate sale, the existence of an active program to locate a buyer and the probable sale or transfer of the asset within one year. If such criteria are met, we present the applicable assets and liabilities related to the real estate asset, if material, separately on the balance sheet as held for sale and we would cease to record depreciation and amortization expense. Real estate assets held for sale are reported at the lower of their carrying value or their estimated fair value less the estimated costs to sell. As of December 31, 2019 and 2018, we did not have any properties classified as held for sale.

Property disposals representing a strategic shift that have (or will have) a major effect on the Company’s operations and financial results, such as a major line of business, a major geographical area or a major equity investment, are required to be presented as discontinued operations. If we were to determine that a property disposition represents a strategic shift, the revenues, expenses and net gain (loss) on dispositions of the property would be recorded in discontinued operations for all periods presented through the date of the applicable disposition. The operations of the properties sold during the years ended December 31, 2019, 2018 and 2017 are presented in continuing operations as they did not represent a strategic shift in the Company’s operations and financial results.

The net gains (losses) on dispositions of non-depreciable real estate property, including land, are reported in the consolidated statements of operations as gains (losses) on sale of land within continuing operations in the period the land is sold. The net gains (losses) on dispositions of depreciable real estate property are reported in the consolidated statements of operations as gains on sales of depreciable operating properties within continuing operations in the period the land is sold.

Cash and Cash Equivalents

We consider all highly-liquid investments with original maturities of three months or less to be cash equivalents.

Restricted Cash

Restricted cash consists of cash proceeds from dispositions that are temporarily held at qualified intermediaries for purposes of facilitating potential Section 1031 Exchanges and cash held in escrow related to acquisition and

disposition holdbacks. Restricted cash also includes cash held as collateral to provide credit enhancement for the Operating Partnership’s mortgage debt, including cash reserves for capital expenditures, tenant improvements and property taxes. As of December 31, 2019, we did not have any restricted cash held at qualified intermediaries for the purpose of facilitating Section 1031 Exchanges. As of December 31, 2018, we had $113.1 million of restricted cash held at qualified intermediaries for the purpose of facilitating Section 1031 Exchanges. In January 2019, the Section 1031 Exchange was completed and the cash proceeds were released from the qualified intermediary.

Marketable Securities / Deferred Compensation Plan

Marketable securities reported in our consolidated balance sheets represent the assets held in connection with the Kilroy Realty Corporation 2007 Deferred Compensation Plan (the “Deferred Compensation Plan”) (see Note 16 “Employee Benefit Plans” for additional information). The Deferred Compensation Plan assets are held in a limited rabbi trust and invested in various mutual and money market funds. As a result, the marketable securities are treated as trading securities for financial reporting purposes and are adjusted to fair value at the end of each accounting period, with the corresponding gains and losses recorded in interest income and other net investment gains (losses).

At the time eligible management employees (“Participants”) defer compensation or earn mandatory Company contributions, or if we were to make a discretionary contribution, we record compensation cost and a corresponding deferred compensation plan liability, which is included in accounts payable, accrued expenses, and other liabilities on our consolidated balance sheets. This liability is adjusted to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each Participant, and the impact of adjusting the liability to fair value is recorded as an increase or decrease to compensation cost. The impact of adjusting the deferred compensation plan liability to fair value and the changes in the value of the marketable securities held in connection with the Deferred Compensation Plan generally offset and therefore do not significantly impact net income.

Deferred Leasing Costs

Costs incurred in connection with successful property leasing are capitalized as deferred leasing costs and classified as investing activities in the statement of cash flows. Under Topic 842, initial direct costs include only those costs that are incremental to the arrangement and would not have been incurred if the lease had not been obtained. As a result, subsequent to the adoption of Topic 842 on January 1, 2019, deferred leasing costs consist of leasing commissions paid to external third party brokers and lease incentives, and the Company no longer capitalizes internal leasing costs and third-party legal leasing costs. Prior to the adoption of Topic 842, deferred leasing costs consisted primarily of leasing commissions, lease incentives, legal costs and certain internal payroll costs. Deferred leasing costs are amortized using the straight-line method of accounting over the lives of the leases which generally range from one to 20 years. We reevaluate the remaining useful lives of leasing costs as the creditworthiness of our tenants and economic and market conditions change. If we determine that the estimated remaining life of a lease has changed, we adjust the amortization period accordingly. Fully amortized deferred leasing costs are written off each quarter.

Deferred Financing Costs

Financing costs related to the origination or assumption of long-term debt are deferred and generally amortized using the straight-line method of accounting, which approximates the effective interest method, over the contractual terms of the applicable financings. Fully amortized deferred financing costs are written off when the corresponding financing is repaid.

Debt Discounts and Premiums

Original issuance debt discounts and discounts/premiums related to recording debt acquired in connection with operating property acquisitions at fair value are generally amortized and accreted on a straight-line basis, which approximates the effective interest method. Discounts are recorded as additional interest expense from date of issuance or acquisition through the contractual maturity date of the related debt. Premiums are recorded as a reduction to interest expense from the date of issuance or acquisition through the contractual maturity date of the related debt.

Noncontrolling Interests - Common Units of the Operating Partnership in the Company's Consolidated Financial Statements

Common units of the Operating Partnership within noncontrolling interests in the Company’s consolidated financial statements represent the common limited partnership interests in the Operating Partnership not held by the Company (“noncontrolling common units”). Noncontrolling common units are presented in the equity section of the Company’s consolidated balance sheets and are reported at their proportionate share of the net assets of the Operating Partnership. Noncontrolling interests with redemption provisions that permit the issuer to settle in either cash or shares of common stock must be further evaluated to determine whether equity or temporary equity classification on the balance sheet is appropriate. Since the common units contain such a provision, we evaluated the accounting guidance and determined that the common units qualify for equity presentation in the Company’s consolidated financial statements. Net income attributable to noncontrolling common units is allocated based on their relative ownership percentage of the Operating Partnership during the reported period. The noncontrolling interest ownership percentage is determined by dividing the number of noncontrolling common units by the total number of common units outstanding. The issuance or redemption of additional shares of common stock or common units results in changes to the noncontrolling interest percentage as well as the total net assets of the Company. As a result, all equity transactions result in an allocation between equity and the noncontrolling interest in the Company’s consolidated balance sheets and statements of equity to account for the changes in the noncontrolling interest ownership percentage as well as the change in total net assets of the Company.

Noncontrolling Interests in Consolidated Property Partnerships

Noncontrolling interests in consolidated property partnerships represent the equity interests held by unrelated third parties in our three consolidated property partnerships (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” and see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”). Noncontrolling interests in consolidated property partnerships are not redeemable and are presented as permanent equity in the Company's consolidated balance sheets. We account for the noncontrolling interests in consolidated property partnerships using the hypothetical liquidation at book value (“HLBV”) method to attribute the earnings or losses of the consolidated property partnerships between the controlling and noncontrolling interests. Under the HLBV method, the amounts reported as noncontrolling interests in consolidated property partnerships in the consolidated balance sheets represent the amounts the noncontrolling interests would hypothetically receive at each balance sheet reporting date under the liquidation provisions of the governing agreements assuming the net assets of the consolidated property partnerships were liquidated at recorded amounts and distributed between the controlling and noncontrolling interests in accordance with the governing documents. The net income attributable to noncontrolling interests in consolidated property partnerships in the consolidated statements of operations is associated with the increase or decrease in the noncontrolling interest holders’ contractual claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the end of that reporting period when compared with their claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the beginning of that reporting period, after removing any contributions or distributions.

Common Partnership Interests on the Operating Partnership’s Consolidated Balance Sheets

The common units held by the Company and the noncontrolling common units held by the common limited partners are both presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets in partners’ capital. The redemption rights of the noncontrolling common units permit us to settle the redemption obligation in either cash or shares of the Company’s common stock at our option (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” for additional information).

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Noncontrolling interests in the Operating Partnership’s consolidated financial statements include the noncontrolling interest in property partnerships (see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”) and the Company’s 1.0% general partnership interest in the Finance Partnership. The 1.0% general partnership interest in the Finance Partnership noncontrolling interest is presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets given that these interests are not convertible or redeemable into any other ownership interest of the Company or the Operating Partnership.

Equity Offerings

Underwriting commissions and offering costs incurred in connection with common equity offerings and our at-the-market stock offering program (see Note 13 “Stockholders’ Equity of the Company”) are reflected as a reduction of additional paid-in capital. Issuance costs incurred in connection with preferred equity offerings are reflected as a reduction of the carrying value of the preferred equity.

Sales of our common stock under forward equity sale agreements (such as those under the forward equity offering executed in August 2018 and those under the 2018 At-The-Market Program, as discussed in Note 13 “Stockholders’ Equity of the Company”) meet the derivatives and hedging guidance scope exception to be accounted for as equity instruments based on the following assessment: (i) none of the agreements’ exercise contingencies were based on observable markets or indices besides those related to the market for our own stock price and operations; and (ii) none of the settlement provisions precluded the agreements from being indexed to our own stock.

The net proceeds from any equity offering of the Company are generally contributed to the Operating Partnership in exchange for a number of common units equivalent to the number of shares of common stock issued and are reflected in the Operating Partnership’s consolidated financial statements as an increase in partners’ capital.

Share-based Incentive Compensation Accounting

Compensation cost for all share-based awards, including options, requires measurement at estimated fair value on the grant date. Compensation cost is recognized on a straight-line basis over the service vesting period, which represents the requisite service period. The grant date fair value of market measure-based share-based compensation plans are calculated using a Monte Carlo simulation pricing model. The grant date fair value of stock option grants is calculated using the Black-Scholes valuation model. Equity awards settled in cash are valued at the fair value of our common stock on the period end date through the settlement date. Equity awards settled in cash are remeasured at each reporting period and are recognized as a liability in the consolidated balance sheet during the vesting period until settlement. Forfeitures of all share-based awards are recognized when they occur.

For share-based awards in which the performance period precedes the grant date, we recognize compensation cost over the requisite service period, which includes both the performance and service vesting periods, using the accelerated attribution expense method. The requisite service period begins on the date the Executive Compensation Committee authorizes the award and adopts any relevant performance measures.

For share-based awards with performance-based measures, the total estimated compensation cost is based on our most recent estimate of the probable achievement of the pre-established specific corporate performance measures. These estimates are based on actual results and our latest internal forecasts for each performance measure. For share-based awards with market measures, the total estimated compensation cost is based on the fair value of the award at the grant date. For share-based awards with performance-based measures and market measures, the total estimated compensation cost is based on the fair value per share at the grant date multiplied by our most recent estimate of the number of shares to be earned based on actual results and the probable achievement of the pre-established corporate performance measures based on our latest internal forecasts.

In accordance with the provisions of our share-based incentive compensation plan, we accept the return of shares of Company common stock, at the current quoted market price, from employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

For share-based awards granted by the Company, the Operating Partnership issues a number of common units equal to the number of shares of common stock ultimately granted by the Company in respect of such awards.

Basic and Diluted Net Income Available to Common Stockholders per Share

Basic net income available to common stockholders per share is computed by dividing net income available to common stockholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of shares of common stock outstanding for the period. Diluted net income available to

common stockholders per share is computed by dividing net income available for common stockholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of shares of common stock outstanding for the period plus the assumed exercise of all dilutive securities. The impact of the outstanding common units is considered in the calculation of diluted net income available to common stockholders per share. The common units are not reflected in the diluted net income available to common stockholders per share calculation because the exchange of common units into common stock is on a one for one basis, and the common units are allocated net income on a per share basis equal to the common stock (see Note 21 “Net Income Available to Common Stockholders Per Share of the Company”). Accordingly, any exchange would not have any effect on diluted net income (loss) available to common stockholders per share.

Nonvested share-based payment awards (including nonvested restricted stock units (“RSUs”), vested market-measure RSUs and vested dividend equivalents issued to holders of RSUs) containing nonforfeitable rights to dividends or dividend equivalents are accounted for as participating securities and included in the computation of basic and diluted net income available to common stockholders per share pursuant to the two-class method. The dilutive effect of shares issuable under executed forward equity sale agreements and stock options are reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. The dilutive effect of the outstanding nonvested shares of common stock (“nonvested shares”) and RSUs that have not yet been granted but are contingently issuable under the share-based compensation programs is reflected in the weighted average diluted shares calculation by application of the treasury stock method at the beginning of the quarterly period in which all necessary conditions have been satisfied.

Basic and Diluted Net Income Available to Common Unitholders per Unit

Basic net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of vested common units outstanding for the period. Diluted net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of common units outstanding for the period plus the assumed exercise of all dilutive securities.

The dilutive effect of stock options, outstanding nonvested shares, RSUs, awards containing nonforfeitable rights to dividend equivalents and shares issuable under executed forward equity sale agreements are reflected in diluted net income available to common unitholders per unit in the same manner as noted above for net income available to common stockholders per share.

Fair Value Measurements

The fair values of our financial assets and liabilities are disclosed in Note 19, “Fair Value Measurements and Disclosures,” to our consolidated financial statements. The only financial assets recorded at fair value on a recurring basis in our consolidated financial statements are our marketable securities. We elected not to apply the fair value option for any of our eligible financial instruments or other items.

We determine the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy:

• Level 1 – quoted prices for identical instruments in active markets;

• Level 2 – quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and

• Level 3 – fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

We determine the fair value for the marketable securities using quoted prices in active markets for identical assets. Our other financial instruments, which are only disclosed at fair value, are comprised of secured debt, unsecured senior notes, unsecured line of credit and unsecured term loan facility.

We generally determine the fair value of our secured debt, unsecured debt, and unsecured line of credit by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market rate by obtaining period-end treasury rates for maturities that correspond to the maturities of our fixed-rate debt and then adding an appropriate credit spread based on information obtained from third-party financial institutions. These credit spreads take into account factors, including but not limited to, our credit profile, the tenure of the debt, amortization period, whether the debt is secured or unsecured, and the loan-to-value ratio of the debt to the collateral. These calculations are significantly affected by the assumptions used, including the discount rate, credit spreads and estimates of future cash flow. We calculate the market rate of our unsecured line of credit, unsecured term loan facility, and unsecured term loan by obtaining the period-end London Interbank Offered Rate (“LIBOR”) and then adding an appropriate credit spread based on our credit ratings, and the amended terms of our unsecured line of credit, unsecured term loan facility, and unsecured term loan agreement. We determine the fair value of each of our publicly traded unsecured senior notes based on their quoted trading price at the end of the reporting period, if such prices are available.

Carrying amounts of our cash and cash equivalents, restricted cash and accounts payable approximate fair value due to their short-term maturities.

Income Taxes

We have elected to be taxed as a REIT under Sections 856 through 860 of the Code. To qualify as a REIT, we must distribute annually at least 90% of our adjusted taxable income, as defined in the Code, to our stockholders and satisfy certain other organizational and operating requirements. We generally will not be subject to federal income taxes if we distribute 100% of our taxable income for each year to our stockholders. If we fail to qualify as a REIT in any taxable year, we will be subject to federal income taxes (including any applicable alternative minimum tax) on our taxable income at regular corporate rates and we may not be able to qualify as a REIT for four subsequent taxable years. Even if we qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property and to federal income taxes and excise taxes on our undistributed taxable income. We believe that we have met all of the REIT distribution and technical requirements for the years ended December 31, 2019, 2018 and 2017, and we were not subject to any federal income taxes (see Note 25 “Tax Treatment of Distributions” for additional information). We intend to continue to adhere to these requirements and maintain the Company’s REIT status. Accordingly, no provision for income taxes has been made in the accompanying financial statements.

In addition, any taxable income from our taxable REIT subsidiaries, which were formed in 2002, 2018 and 2019, are subject to federal, state, and local income taxes. For the years ended December 31, 2019, 2018 and 2017 the taxable REIT subsidiaries had de minimis taxable income.

Uncertain Tax Positions

We include favorable tax positions in the calculation of tax liabilities if it is more likely than not that our adopted tax position will prevail if challenged by tax authorities.

We evaluated the potential impact of identified uncertain tax positions for all tax years still subject to audit under state and federal income tax law and concluded that we did not have any unrecognized tax benefits or any additional tax liabilities as of December 31, 2019 or 2018. As of December 31, 2019, the years still subject to audit are 2015 through 2019 under the California state income tax law and 2016 through 2019 under the federal income tax law.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

Segments

We currently operate in one operating segment, our office properties segment.

Concentration of Credit Risk

All of our properties and development and redevelopment projects are owned and all of our business is currently conducted in the state of California with the exception of the ownership and operation of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. The ability of tenants to honor the terms of their leases is dependent upon the economic, regulatory, and social factors affecting the communities in which our tenants operate.

We have deposited cash with financial institutions that is insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000 per institution. As of December 31, 2019 and 2018, we had cash accounts in excess of FDIC insured limits.

Accounting Standards Issued But Not Yet Effective at December 31, 2019

Accounting Pronouncements Adopted January 1, 2020

ASU No. 2016-13 “Financial Instruments - Credit Losses (Topic 326)”

On June 16, 2016, the FASB issued ASU No. 2016-13 (“ASU 2016-13”) to amend the accounting for credit losses for certain financial instruments. Under the new guidance, an entity recognizes its estimate of expected credit losses as an allowance, which the FASB believes will result in more timely recognition of such losses.  In November 2018, the FASB released ASU No. 2018-19 “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.” This ASU clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 “Financial Instruments – Credit Losses.” Instead, impairment of receivables arising from operating leases should be accounted for under Subtopic 842-30 “Leases – Lessor.” ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

ASU No. 2018-13 “Fair Value Measurement (Topic 820)”

On August 28, 2018, the FASB issued ASU No. 2018-13 (“ASU 2018-13”) to amend the disclosure requirements for fair value measurements. The amendments in ASU 2018-13 include new, modified and eliminated disclosure requirements and are the result of a broader disclosure project called FASB Concepts Statement, Conceptual Framework for Financial Reporting - Chapter 8: Notes to Financial Statements, which the Board finalized on August 28, 2018. The Board used the guidance in the Concepts Statement to improve the effectiveness of ASC 820’s disclosure requirements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for any eliminated or modified disclosures. The adoption did not have a material impact on the disclosures in the notes to the consolidated financial statements.

ASU No. 2018-15 “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)”

On August 29, 2018, the FASB issued ASU No. 2018-15 (“ASU 2018-15”) to amend a customer’s accounting for implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. ASU 2018-15 can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CAPITAL (KILROY REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 77,922	$ 41,794	$ 166,890	$ 40,971	$ 215,229	$ 277,926	$ 180,615
Redemption of Series G & H Preferred stock							(200,000)
Non-cash amortization of share-based compensation					32,813	35,890	26,319
Settlement of restricted stock units					0	0	0
Distributions to noncontrolling interests in consolidated property partnerships					(12,952)	(11,803)	(16,542)
Preferred dividends and distributions							(5,774)
Accounting Standards Update 2016-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening adjustment to Partners’ Capital upon adoption of ASC 842 (Note 2)								$ (3,146)
Noncontrolling Interest In Consolidated Subsidiaries [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income					19,786	19,511	16,003
Distributions to noncontrolling interests in consolidated property partnerships					(12,952)	(11,803)	(16,542)
Kilroy Realty L.P. [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		4,201,261		3,960,316	4,201,261	3,960,316	3,759,317
Net income	77,922	41,794	166,890	40,971	215,229	277,926	180,615
Redemption of Series G & H Preferred stock							(200,000)
Issuance of common units					353,722	130,693	326,058
Issuance of share-based compensation awards					4,664	3,926	5,890
Non-cash amortization of share-based compensation					32,813	35,890	26,319
Exercise of stock options					703	41	12,179
Settlement of restricted stock units					0	0	0
Repurchase of common units and restricted stock units					(14,861)	(16,553)	(12,986)
Contributions from noncontrolling interest in consolidated property partnership						8,273	54,604
Distributions to noncontrolling interests in consolidated property partnerships					(12,952)	(11,803)	(16,542)
Preferred dividends and distributions							(5,774)
Distributions declared per common unit					(206,575)	(187,448)	(169,364)
Ending balance	4,570,858		4,201,261		4,570,858	4,201,261	3,960,316
Kilroy Realty L.P. [Member] | Accounting Standards Update 2016-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening adjustment to Partners’ Capital upon adoption of ASC 842 (Note 2)								(3,146)
Kilroy Realty L.P. [Member] | Total Partners Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		4,003,700		3,773,941	4,003,700	3,773,941	3,624,179
Net income					198,738	263,210	167,440
Redemption of Series G & H Preferred stock							(200,000)
Issuance of common units					353,722	130,693	326,058
Issuance of share-based compensation awards					4,664	3,926	5,890
Non-cash amortization of share-based compensation					32,813	35,890	26,319
Exercise of stock options					703	41	12,179
Repurchase of common units and restricted stock units					(14,861)	(16,553)	(12,986)
Preferred dividends and distributions							(5,774)
Distributions declared per common unit					(206,575)	(187,448)	(169,364)
Ending balance	4,369,758		4,003,700		4,369,758	4,003,700	3,773,941
Kilroy Realty L.P. [Member] | Total Partners Capital [Member] | Accounting Standards Update 2016-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening adjustment to Partners’ Capital upon adoption of ASC 842 (Note 2)								(3,146)
Kilroy Realty L.P. [Member] | Partners Capital Preferred Units [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		0		0	0	0	192,411
Redemption of Series G & H Preferred stock							(192,411)
Ending balance	0		0		0	0	0
Kilroy Realty L.P. [Member] | Partners Capital Common Unit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		$ 4,003,700		$ 3,773,941	$ 4,003,700	$ 3,773,941	$ 3,431,768
Beginning balance (in units)		102,772,275		100,697,526	102,772,275	100,697,526	95,600,982
Net income					$ 198,738	$ 263,210	$ 167,440
Redemption of Series G & H Preferred stock							(7,589)
Issuance of common units					$ 353,722	$ 130,693	$ 326,058
Issuance of common units (in units)					5,000,000	1,817,195	4,662,577
Issuance of share-based compensation awards					$ 4,664	$ 3,926	$ 5,890
Non-cash amortization of share-based compensation					32,813	35,890	26,319
Exercise of stock options					$ 703	$ 41	$ 12,179
Exercise of stock options (in units)					16,500	1,000	285,000
Settlement of restricted stock units (in units)					463,276	488,354	317,848
Repurchase of common units and restricted stock units					$ (14,861)	$ (16,553)	$ (12,986)
Repurchase of common units and restricted stock units (in units)					(212,477)	(231,800)	(168,881)
Preferred dividends and distributions							$ (5,774)
Distributions declared per common unit					$ (206,575)	$ (187,448)	(169,364)
Ending balance	$ 4,369,758		$ 4,003,700		$ 4,369,758	$ 4,003,700	$ 3,773,941
Ending balance (in units)	108,039,574		102,772,275		108,039,574	102,772,275	100,697,526
Kilroy Realty L.P. [Member] | Partners Capital Common Unit [Member] | Accounting Standards Update 2016-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Opening adjustment to Partners’ Capital upon adoption of ASC 842 (Note 2)								$ (3,146)
Kilroy Realty L.P. [Member] | Noncontrolling Interest In Consolidated Subsidiaries [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		$ 197,561		$ 186,375	$ 197,561	$ 186,375	$ 135,138
Net income					16,491	14,716	13,175
Contributions from noncontrolling interest in consolidated property partnership						8,273	54,604
Distributions to noncontrolling interests in consolidated property partnerships					(12,952)	(11,803)	(16,542)
Ending balance	$ 201,100		$ 197,561		$ 201,100	$ 197,561	$ 186,375

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Tax Treatment of Distributions - Dividends (Details) - $ / shares			3 Months Ended		12 Months Ended
	Jan. 13, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Dividends declared per common share (in dollars per share)			$ 0.375	$ 0.375	$ 1.91000	$ 1.79	$ 1.65
Dividends paid per common share (in dollars per share)	$ 0.313
Common Stock [Member]
Class of Stock [Line Items]
Dividends declared per common share (in dollars per share)				2.275	1.910	1.790	1.650
Less: Dividends declared in the current year and paid in the following year (in dollars per share)					(0.485)	(0.455)	(0.425)
Add: Dividends declared in the prior year and paid in the current year (in dollars per share)					0.455	0.425	2.275
Dividends paid per common share (in dollars per share)					$ 1.880	$ 1.760	$ 3.500
Special Dividend [Member]
Class of Stock [Line Items]
Dividends declared per common share (in dollars per share)				$ 1.90
Dividends paid per common share (in dollars per share)		$ 1.587

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Share-Based and Other Compensation - Market-Measure Based RSUs (Details) - Market measure-based Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per share on valuation date (in dollars per share)	$ 71.12
Vested (in shares)	(265,737)	(265,918)	(194,991)
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	231,191	601,012	170,994
Fair value per share on valuation date (in dollars per share)	$ 71.12	$ 68.51	$ 78.97
Vested (in shares)	(261,990)
Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,155
Vested (in shares)	(261,990)
Total Fair Value at Vest Date	$ 18,703	$ 18,906	$ 14,270

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Fair Value Measurements and Disclosures

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements and Disclosures

Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets we record at fair value on our consolidated financial statements are the marketable securities related to our Deferred Compensation Plan (see Note 16 “Employee Benefit Plans” for additional information). The following table sets forth the fair value of our marketable securities as of December 31, 2019 and 2018:

	Fair Value (Level 1) (1)
	2019		2018
Description	(in thousands)
Marketable securities (2)	$	27,098	$	21,779

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment (losses) gains in the consolidated statements of operations. We also adjust the related Deferred Compensation Plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to compensation cost for the period.

The following table sets forth the net (loss) gain on marketable securities recorded during the years ended December 31, 2019, 2018 and 2017:

	December 31,
	2019		2018			2017
Description	(in thousands)
Net gain (loss) on marketable securities	$	3,885	$	(1,851	)	$	3,023

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of December 31, 2019 and 2018: 

	December 31,
	2019				2018
	Carrying Value		Fair Value (1)		Carrying Value		Fair Value (1)
	(in thousands)
Liabilities
Secured debt, net	$	258,593	$	272,997	$	335,531	$	335,885
Unsecured debt, net	3,049,185		3,252,217		2,552,070		2,546,386
Unsecured line of credit	245,000		245,195		45,000		45,058

_______________

(1)

Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

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Supplemental Cash Flow Information of the Company

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information of the Company

Supplemental Cash Flow Information of the Company

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of    December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common     unitholders (Notes 13 and 28)	$	53,219	$	47,559	$	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s    common stock	$	78	$	1,962	$	10,939

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

Supplemental Cash Flow Information of the Operating Partnership:

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$	53,219	$	47,559	$	43,448

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

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Share-Based and Other Compensation - Nonvested Restricted Stock (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0
Fair value per share on valuation date (in dollars per share)	$ 0	$ 0
Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)	(22,884)	(24,261)
Total Fair Value at Vest Date	$ 1,652	$ 1,781

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Future Minimum Rent (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Future contractual minimum rent under operating lease

Future contractual minimum rent under operating leases as of December 31, 2019 for future periods is summarized as follows:

Year Ending	(in thousands)
2020	$	675,636
2021	728,736
2022	785,239
2023	769,294
2024	727,399
Thereafter	4,054,487
Total (1)	$	7,740,791

______________

(1)

Excludes residential leases and leases with a term of one year or less.

Future contractual minimum rent under operating lease

Future contractual minimum rent under operating leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	566,783
2020	632,875
2021	631,835
2022	620,684
2023	586,371
Thereafter	3,240,143
Total (1)	$	6,278,691

______________

(1)

Excludes residential leases and leases with a term of one year or less.

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Deferred Revenue and Acquisition-Related Intangible Liabilities, net (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Deferred revenue and acquisition-related liabilities

Deferred revenue and acquisition-related intangible liabilities, net consisted of the following at December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Deferred revenue related to tenant-funded tenant improvements	$	96,271	$	104,558
Other deferred revenue	19,125		15,950
Acquisition-related intangible liabilities, net (1)	24,092		29,138
Total	$	139,488	$149,646

________________________

(1)

See Note 5 “Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net” for additional information regarding our acquisition-related intangible liabilities.

Estimated amortization of deferred revenue related to tenant-funded improvements

The following is the estimated amortization of deferred revenue related to tenant-funded tenant improvements as of December 31, 2019 for the next five years and thereafter:

Year Ending	(in thousands)
2020	$	16,935
2021	15,426
2022	14,320
2023	12,553
2024	10,318
Thereafter	26,719
Total	$	96,271

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Basis of Presentation and Significant Accounting Policies - Narrative (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) variable_interest_entity	Dec. 31, 2019 USD ($) segment variable_interest_entity property_partnership	Dec. 31, 2018 USD ($) variable_interest_entity property_partnership	Dec. 31, 2017 USD ($)	Dec. 31, 2019 building	Dec. 31, 2019 property	Dec. 31, 2019	Dec. 31, 2019 property_partnership	Dec. 31, 2019 project	Jan. 01, 2019 USD ($) ground_lease
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of VIEs | variable_interest_entity		4	3
VIE asset amount	$ 676,700,000	$ 676,700,000	$ 615,400,000
VIE, carrying amount, liabilities	40,100,000	40,100,000	45,100,000
Noncontrolling interest in consolidated subsidiary	195,431,000	195,431,000	192,363,000
Lease income		826,472,000
Leasing costs		7,615,000
Number of ground leases | ground_lease										4
Weighted average discount rate							5.15%
Right of use ground lease asset (6)	96,348,000	96,348,000								$ 96,272,000
Ground lease liabilities	$ 98,400,000	$ 98,400,000								98,349,000
Number of consolidated property partnerships | property_partnership		3
Conversion ratio		1
Income tax provision		$ 0	0	$ 0
Number of operating segments | segment		1
Washington [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of buildings					1	8
Number of development projects | project									1
Building and building improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Depreciation of real estate		$ 211,900,000	198,600,000	$ 190,500,000
Kilroy Realty Finance, Inc. [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percentage of general partnership interest owned by wholly-owned subsidiary of the Company		1.00%
Minimum [Member] | Building and building improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property depreciable lives		25 years
Minimum [Member] | Leasehold improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property depreciable lives		1 year
Maximum [Member] | Building and building improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property depreciable lives		40 years
Maximum [Member] | Leasehold improvements [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Property depreciable lives		20 years
Lease Agreements [Member] | Minimum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Finite-lived intangible asset, useful life		1 year
Lease Agreements [Member] | Maximum [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Finite-lived intangible asset, useful life		20 years
Disposal group, disposed of by sale [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Restricted cash			$ 113,100,000
100 First LLC and 303 Second LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of VIEs	2		2
Noncontrolling interest in consolidated subsidiary	$ 189,600,000	$ 189,600,000	$ 186,400,000
Real estate investment [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
VIE asset amount	$ 598,000,000.0	598,000,000.0	$ 543,900,000
Accounting Standards Update 2016-02 [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Leasing costs		11,400,000
Cumulative adjustment										(3,146,000)
Right of use ground lease asset (6)										82,900,000
Ground lease liabilities										87,400,000
Accounting Standards Update 2016-02 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cumulative adjustment										$ (3,146,000)
Property expense reimbursement [Member] | Accounting Standards Update 2016-02 [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Lease income		$ 13,900,000
Development properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of buildings								3	2
Development properties [Member] | 100 First LLC and 303 Second LLC [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of buildings | property_partnership								2

XML

Prepaid Expenses and Other Assets, Net - Schedule of Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Furniture, fixtures and other long-lived assets, net	$ 35,286	$ 36,833
Notes receivable	1,651	2,113
Prepaid expenses	18,724	13,927
Total prepaid expenses and other assets, net	55,661	52,873
Non-refundable acquisition deposit	$ 3,600	$ 2,900

XML

Secured and Unsecured Debt of the Operating Partnership - Unsecured Senior Notes - Registered Offerings and Private Placement (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Nov. 30, 2018
Debt Instrument [Line Items]
Debt issuance discount		$ (6,500,000)
Loss on early extinguishment of debt (Note 9)		0	$ 12,623,000	$ 5,312,000
Unsecured debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,600,000,000	3,300,000,000	2,600,000,000
Kilroy Realty L.P. [Member]
Debt Instrument [Line Items]
Loss on early extinguishment of debt (Note 9)		$ 0	12,623,000	$ 5,312,000
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.050% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount					$ 500,000,000.0	$ 400,000,000.0
Debt issuance discount					$ (600,000)
Stated interest rate		3.05%			3.05%
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.750% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 400,000,000.0		$ 400,000,000.0
Debt issuance discount						$ (1,500,000)
Stated interest rate	4.75%		4.75%			4.75%
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 6.625% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 250,000,000.0		$ 250,000,000.0
Stated interest rate	6.625%		6.625%
Loss on early extinguishment of debt (Note 9)	$ 12,600,000
Extinguishment of debt	11,800,000
Write off of unamortized discount and deferred financing costs	$ 800,000
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.300% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 50,000,000.0
Stated interest rate		4.30%
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.350% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 200,000,000.0
Stated interest rate		4.35%
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | Series A Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 50,000,000.0
Long-term debt		50,000,000
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | Series B Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		200,000,000.0
Long-term debt		$ 200,000,000
Kilroy Realty L.P. [Member] | Private placement [Member] | Unsecured debt [Member] | Series A and B Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Operating partnership, payment percent		5.00%
Operating partnership, total payment percentage		100.00%

XML

Dispositions - Operating Property Dispositions (Details) $ in Thousands	1 Months Ended						12 Months Ended
	Oct. 31, 2019 USD ($) ft² property	May 31, 2019 USD ($) ft² property	Dec. 31, 2018 USD ($) ft² property	Nov. 30, 2018 USD ($) ft² property	Sep. 30, 2017 USD ($) ft² a property	Jan. 31, 2017 USD ($) ft² property	Dec. 31, 2019 USD ($) ft² property	Dec. 31, 2018 USD ($) ft² property	Dec. 31, 2017 USD ($) ft² property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rentable square feet | ft²							13,475,795
Gains on sales of operating properties | $							$ 36,802	$ 142,926	$ 39,507
Disposal group, disposed of by sale [Member] | 2829 Townsgate Road, Thousand Oaks, CA and 2211 Michelson Drive, Irvine, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property							2
Rentable square feet | ft²							355,654
Proceeds from sale of property held-for-sale | $							$ 133,800
Disposal group, disposed of by sale [Member] | 2829 Townsgate Road, Thousand Oaks, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property		1
Rentable square feet | ft²		84,098
Proceeds from sale of property held-for-sale | $		$ 18,300
Disposal group, disposed of by sale [Member] | 2211 Michelson Drive Irvine CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property	1
Rentable square feet | ft²	271,556
Proceeds from sale of property held-for-sale | $	$ 115,500
Disposal group, disposed of by sale [Member] | 1310-1327 Chesapeake Terrace, Sunnyvale, CA , Plaza Yarrow Bay Properties, and 23925, 23975, & 24025 Park Sorrento, Calabasas, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property			11					11
Rentable square feet | ft²			772,246					772,246
Proceeds from sale of property held-for-sale | $								$ 373,000
Disposal group, disposed of by sale [Member] | 1325-1327 Chesapeake Terrace, Sunnyvale, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property				4
Rentable square feet | ft²				266,982
Proceeds from sale of property held-for-sale | $				$ 160,300
Disposal group, disposed of by sale [Member] | Plaza Yarrow Bay Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property				4
Rentable square feet | ft²				279,924
Proceeds from sale of property held-for-sale | $				$ 134,500
Disposal group, disposed of by sale [Member] | 23925, 23975, & 24025 Park Sorrento, Calabasas, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property			3					3
Rentable square feet | ft²			225,340					225,340
Proceeds from sale of property held-for-sale | $			$ 78,200
Disposal group, disposed of by sale [Member] | 5717 Pacific Center Boulevard, San Diego, CA and Sorrento Mesa and Mission Valley Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property									11
Rentable square feet | ft²									743,138
Proceeds from sale of property held-for-sale | $									$ 186,600
Disposal group, disposed of by sale [Member] | 5717 Pacific Center Boulevard, San Diego, CA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property						1
Rentable square feet | ft²						67,995
Proceeds from sale of property held-for-sale | $						$ 12,100
Disposal group, disposed of by sale [Member] | Sorrento Mesa and Mission Valley Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings | property					10
Rentable square feet | ft²					675,143
Proceeds from sale of property held-for-sale | $					$ 174,500
Area of land | a					5.0

XML

Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net - Amortization of Deferred Leasing Costs and Acquisition-related Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	$ 45,188	$ 40,415	$ 41,704
Deferred leasing costs [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	35,779	34,341	31,675
Estimated annual amortization related to acquisition-related intangible assets
Finite-lived intangible assets, 2020	30,897
Finite-lived intangible assets, 2021	27,043
Finite-lived intangible assets, 2022	23,642
Finite-lived intangible assets, 2023	19,904
Finite-lived intangible assets, 2024	16,976
Finite-lived intangible assets, thereafter	67,419
Finite-lived intangible assets	185,881	166,100
Above market leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	192	444	2,240
Estimated annual amortization related to acquisition-related intangible assets
Finite-lived intangible assets, 2020	38
Finite-lived intangible assets, 2021	38
Finite-lived intangible assets, 2022	38
Finite-lived intangible assets, 2023	38
Finite-lived intangible assets, 2024	38
Finite-lived intangible assets, thereafter	305
Finite-lived intangible assets	495	686
In-place leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	18,615	15,915	18,650
Estimated annual amortization related to acquisition-related intangible assets
Finite-lived intangible assets, 2020	11,379
Finite-lived intangible assets, 2021	6,668
Finite-lived intangible assets, 2022	4,001
Finite-lived intangible assets, 2023	1,641
Finite-lived intangible assets, 2024	602
Finite-lived intangible assets, thereafter	2,138
Finite-lived intangible assets	26,429	30,352
Below-market ground lease obligation [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	0	8	8
Estimated annual amortization related to acquisition-related intangible assets
Finite-lived intangible assets	0	436
Below-market operating leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of intangible liabilities	(9,398)	(10,192)	(10,768)
Estimated annual amortization related to acquisition-related intangible liabilities
Acquisition-related intangible liabilities, 2020	(7,258)
Acquisition-related intangible liabilities, 2021	(4,543)
Acquisition-related intangible liabilities, 2022	(3,553)
Acquisition-related intangible liabilities, 2023	(1,866)
Acquisition-related intangible liabilities, 2024	(1,090)
Acquisition-related intangible liabilities, thereafter	(5,782)
Acquisition-related intangible liabilities	(24,092)	(23,545)
Above-market ground lease obligation [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization of intangible liabilities	0	(101)	$ (101)
Estimated annual amortization related to acquisition-related intangible liabilities
Acquisition-related intangible liabilities	$ 0	$ (5,593)

XML

Deferred Revenue and Acquisition-Related Intangible Liabilities, net - Deferred Revenue and Acquisition-Related Intangible Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 96,271	$ 104,558
Other deferred revenue	19,125	15,950
Acquisition-related intangible liabilities, net	24,092	29,138
Deferred revenue and acquisition-related intangible liabilities, net	$ 139,488	$ 149,646

XML

Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

Years ended December 31, 2019, 2018 and 2017

(in thousands)

	Balance at Beginning of Period (1)		Charged to Costs and Expenses (2)		Recoveries (Deductions)			Balance at End of Period
Allowance for Uncollectible Tenant Receivables for the year ended December 31,
2019 – Allowance for uncollectible tenant receivables	$	512	$	907	$	(248	)	$	1,171
2018 – Allowance for uncollectible tenant receivables	2,309		2,604		(274		)	4,639
2017 – Allowance for uncollectible tenant receivables	1,712		1,517		(920		)	2,309
Allowance for Deferred Rent Receivables for the year ended December 31,
2019 – Allowance for deferred rent	$	195	$	1,357	$	—		$	1,552
2018 – Allowance for deferred rent	3,238		165		(64		)	3,339
2017 – Allowance for deferred rent	1,524		1,752		(38		)	3,238

__________________

(1) On January 1, 2019, the Company adopted Topic 842 on a modified retrospective basis and recognized a cumulative-effect adjustment to distributions in excess of earnings related to the allowances for uncollectible tenant receivables and deferred rent receivables. As such, the ending balances of the allowances for uncollectible tenant receivables and deferred rent receivables at December 31, 2018 do not equal the beginning balances on January 1, 2019.

(2)

For the year ended December 31, 2019, amounts do not reflect leases deemed not probable of collection for which we reversed the associated revenue under Topic 842. In addition, for the years ended December 31, 2019 and 2018, $0.7 million and $2.9 million, respectively, was charged to costs and expenses for a valuation allowance for a note receivable.

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Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Basis of Presentation and Significant Accounting Policies [Abstract]

Schedule of allocation of rental income between fixed and variable payments

The table below sets forth the allocation of rental income between fixed and variable payments for the year ended December 31, 2019:

	Year Ended
	December 31, 2019
	(in thousands)
Fixed lease payments	$	710,557
Variable lease payments	115,915
Total rental income	$	826,472

Buildings, improvements, and tenant improvements depreciation

The costs of buildings and improvements and tenant improvements are depreciated using the straight-line method of accounting over the estimated useful lives set forth in the table below. Depreciation expense for buildings and improvements for the three years ended December 31, 2019, 2018, and 2017 was $211.9 million, $198.6 million, and $190.5 million, respectively.

Asset Description	Depreciable Lives
Buildings and improvements	25 – 40 years
Tenant improvements	1 – 20 years (1)

________________________

(1)

Tenant improvements are amortized over the shorter of the lease term or the estimated useful life.

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Share-Based and Other Compensation - 2019, 2018 and 2017 Annual Performance-Based RSU Grants (Details) - USD ($) $ / shares in Units, $ in Millions					1 Months Ended	12 Months Ended
	Feb. 01, 2019	Dec. 27, 2018	Feb. 14, 2018	Feb. 24, 2017	Feb. 28, 2019	Dec. 31, 2019
2019 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						3 years
Vesting criteria, one						100.00%
Vesting criteria, two						50.00%
Vesting criteria, three						50.00%
Performance-based RSUs achievement target, participant one, percent						175.00%
Performance-based RSUs achievement target, all other participants, percent						150.00%
Fair value RSUs granted	$ 10.2		$ 10.8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Fair value per share on valuation date (in dollars per share)	$ 72.57		$ 70.08
2018 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						3 years
Vesting criteria, two						50.00%
Vesting criteria, three						50.00%
Performance-based RSUs achievement target, participant one, percent						175.00%
Performance-based RSUs achievement target, all other participants, percent						150.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Expected share price volatility (in dollars per share)	19.00%		20.00%
Risk-free interest rate	2.48%		2.37%
2017 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						3 years
Vesting criteria, one						100.00%
Vesting criteria, two						30.00%
Vesting criteria, three						40.00%
Performance-based RSUs achievement target, percent						131.00%
Fair value RSUs granted				$ 10.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Fair value per share on valuation date (in dollars per share)				$ 80.89
Expected share price volatility (in dollars per share)				21.00%
Risk-free interest rate				1.39%
Market measure-based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Fair value per share on valuation date (in dollars per share)						$ 71.12
Executive officer share-based compensation programs [Member] | Market measure-based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	143,396	80,647	158,205	130,956	143,396
Market measure-based RSU estimate of probable [Member] | 2019 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated RSUs earned based on FFO						229,095
Target level of achievement, one						125.00%
Target level of achievement, two						117.00%
Market measure-based RSU estimate of probable [Member] | 2018 Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated RSUs earned based on FFO						262,242
Market measure-based RSU estimate of probable [Member] | Market measure-based Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated RSUs earned based on FFO	229,095		262,242	142,581		142,581

XML

Basis of Presentation and Significant Accounting Policies - Allocation of Rental Income (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Basis of Presentation and Significant Accounting Policies [Abstract]
Fixed lease payments	$ 710,557
Variable lease payments	115,915
Total rental income	$ 826,472

XML

Quarterly Financial Information of the Company (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of summarized quarterly financial data

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows: 

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to Kilroy Realty Corporation	36,903		42,194		43,846		72,500
Net income available to common stockholders	36,903		42,194		43,846		72,500
Net income available to common stockholders per share – basic	0.36		0.41		0.41		0.68
Net income available to common stockholders per share – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to Kilroy Realty Corporation	36,246		27,549		34,400		160,220
Net income available to common stockholders	36,246		27,549		34,400		160,220
Net income available to common stockholders per share – basic	0.36		0.27		0.34		1.59
Net income available to common stockholders per share – diluted	0.36		0.27		0.33		1.58

____________________

(1) The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering activity during the year.

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Partners' Capital of the Operating Partnership - At-The-Market Stock Offering, Common Units and Accrued Distributions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Aggregate net proceeds after selling commissions	$ 353,722	$ 130,693	$ 326,058
Summary of units
Ownership interest of noncontrolling interest	1.90%	2.00%
Accrued distributions
Accrued dividends and distributions	$ 53,219	$ 47,559
Common units [Member]
Accrued distributions
Accrued dividends and distributions	981	$ 922
Issuance of Equity under ATM Program [Member]
Class of Stock [Line Items]
Shares of common stock contributed by the Company (in shares)		1,817,195	235,077
Common units exchanged for shares of common stock by the Company (in units)		1,817,195	235,077
Aggregate gross proceeds		$ 133,800	$ 17,700
Aggregate net proceeds after selling commissions		132,100	17,500
Kilroy Realty L.P. [Member]
Class of Stock [Line Items]
Aggregate net proceeds after selling commissions	353,722	130,693	$ 326,058
Accrued distributions
Accrued dividends and distributions	53,219	47,559
Kilroy Realty L.P. [Member] | Restricted Stock Units (RSUs) [Member]
Accrued distributions
Accrued dividends and distributions	$ 820	$ 797
RSUs (in shares)	1,651,905	1,711,628
Kilroy Realty L.P. [Member] | Market measure-based Restricted Stock Units (RSUs) [Member]
Accrued distributions
Number of RSUs outstanding (in shares)	932,675	1,018,337
Kilroy Realty L.P. [Member] | Partners Capital Common Unit [Member]
Accrued distributions
Accrued dividends and distributions	$ 53,219	$ 47,559
Kilroy Realty L.P. [Member] | Partners capital general partner [Member]
Accrued distributions
Accrued dividends and distributions	51,418	45,840
Kilroy Realty L.P. [Member] | Partners capital limited partner [Member]
Accrued distributions
Accrued dividends and distributions	$ 981	$ 922
Kilroy Realty L.P. [Member] | Common units [Member]
Summary of units
Company owned common units in the Operating Partnership (in units)	106,016,287	100,746,988
Noncontrolling common units (in units)	2,023,287	2,025,287
Operating Partnership [Member]
Summary of units
Company owned general partnership interest	98.10%	98.00%

XML

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements - Narrative (Details)	Dec. 31, 2019	Dec. 31, 2018	Aug. 30, 2016
Noncontrolling Interest [Line Items]
Ownership interest of noncontrolling interest	1.90%	2.00%
Consolidated property partnerships [Member] | Norges Bank Real Estate Management (NBREM) [Member]
Noncontrolling Interest [Line Items]
Ownership interest of noncontrolling interest			44.00%

XML

Net Income Available to Common Unitholders Per Unit of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2019

Net Income Available To Common Unitholders [Line Items]

Net income available to common unitholders

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	195,443		$	258,415		$	164,612
Total preferred dividends	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common stockholders	$	193,324		$	256,411		$	149,274
Denominator:
Basic weighted average vested shares outstanding	103,200,568			99,972,359			98,113,561
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested shares and common stock equivalents outstanding	103,849,168			100,482,365			98,727,331
Basic earnings per share:
Net income available to common stockholders per share	$	1.87		$	2.56		$	1.52
Diluted earnings per share:
Net income available to common stockholders per share	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

Kilroy Realty L.P. [Member]

Net Income Available To Common Unitholders [Line Items]

Net income available to common unitholders

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the years ended 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	198,738		$	263,210		$	167,440
Total preferred distributions	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common unitholders	$	196,619		$	261,206		$	152,102
Denominator:
Basic weighted average vested units outstanding	105,223,975			102,025,276			100,246,567
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested units and common unit equivalents outstanding	105,872,575			102,535,282			100,860,337
Basic earnings per unit:
Net income available to common unitholders per unit	$	1.87		$	2.56		$	1.52
Diluted earnings per unit:
Net income available to common unitholders per unit	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

XML

Schedule III - Real Estate and Accumulated Depreciation - Accumulated Depreciation Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Accumulated depreciation, beginning of year	$ 1,391,368	$ 1,264,162	$ 1,139,853
Depreciation of real estate	211,893	198,578	190,515
Total additions during period	211,893	198,578	190,515
Write-offs due to sale	(41,655)	(71,372)	(66,206)
Properties held for sale	0	0	0
Other	(245)	0	0
Total deductions during period	(41,900)	(71,372)	(66,206)
Accumulated depreciation, end of year	$ 1,561,361	$ 1,391,368	$ 1,264,162

XML

Label	Element	Value
Accounting Standards Update 2016-02 [Member] | Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (3,146,000)

XML

Supplemental Cash Flow Information of the Company - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$ 43,607	$ 44,697	$ 67,336
Capitalized interest	77,666	65,627	44,757
Cash paid for amounts included in the measurement of ground lease liabilities	5,224
Cash paid for amounts included in the measurement of ground lease liabilities		4,398	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	162,654	158,626	116,089
Assumption of other assets and liabilities in connection with operating and development property acquisitions, net (Note 3)	10,267	40,624	1,443
Tenant improvements funded directly by tenants	10,268	13,968	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	96,348			$ 96,272
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	98,400			$ 98,349
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 13 and 28)	53,219	47,559	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$ 78	$ 1,962	$ 10,939

XML

Partners' Capital of the Operating Partnership

12 Months Ended

Dec. 31, 2019

Partners' Capital [Abstract]

Partners' Capital of the Operating Partnership

Partners’ Capital of the Operating Partnership

Common Units

Issuance of Common Units

In July 2019, the Company physically settled the forward equity sale agreements entered into in August 2018 (see Note 13 “Stockholders’ Equity of the Company”). Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million and contributed the net proceeds to the Operating Partnership in exchange for 5,000,000 common units.

At-The-Market Stock Offering Program

The Company did not issue any shares of common stock under its at-the-market stock offering program during the year ended December 31, 2019. During the years ended December 31, 2018 and 2017, the Company utilized its at-the-market stock offering programs to issue shares of common stock. See Note 13 “Stockholders’ Equity of the Company” for additional information. The net offering proceeds contributed by the Company to the Operating Partnership in exchange for common units for the years ended December 31, 2019, 2018 and 2017 are as follows:

	Year Ended December 31,
	2018		2017
	(in millions, except share and per share data)
Shares of common stock contributed by the Company	1,817,195		235,077
Common units exchanged for shares of common stock by the Company	1,817,195		235,077
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

Common Units Outstanding

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units as well as the ownership interest held on each respective date:

	December 31, 2019		December 31, 2018
Company owned common units in the Operating Partnership	106,016,287		100,746,988
Company owned general partnership interest	98.1	%	98.0	%
Noncontrolling common units of the Operating Partnership	2,023,287		2,025,287
Ownership interest of noncontrolling interest	1.9	%	2.0	%

For a further discussion of the noncontrolling common units during the years ended December 31, 2019 and 2018, refer to Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements.”

Accrued Distributions

The following tables summarize accrued distributions for the noted common units as of December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Distributions payable to:
General partner	$	51,418	$	45,840
Common limited partners	981		922
RSU holders (1)	820		797
Total accrued distributions to common unitholders	$	53,219	$	47,559

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

	December 31, 2019	December 31, 2018
Outstanding Units:
Common units held by the general partner	106,016,287	100,746,988
Common units held by the limited partners	2,023,287	2,025,287
RSUs (1)	1,651,905	1,711,628

______________________

(1) Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

Preferred Units

On August 15, 2017, the Company redeemed all 4,000,000 shares of its 6.375% Series H Preferred Stock. For each share of Series H Preferred Stock that was outstanding, the Company had an equivalent number of 6.375% Series H Preferred Units (“Series H Preferred Units”) outstanding with substantially similar terms as the Series H Preferred Stock. In connection with the redemption of the Series H Preferred Stock, the Series H Preferred Units held by the Company were redeemed by the Operating Partnership.

On March 30, 2017, the Company redeemed all 4,000,000 shares of its 6.875% Series G Preferred Stock. For each share of Series G Preferred Stock that was outstanding, the Company had an equivalent number of 6.875% Series G Preferred Units (“Series G Preferred Units”) outstanding with substantially similar terms as the Series G Preferred Stock. In connection with the redemption of the Series G Preferred Stock, the Series G Preferred Units held by the Company were redeemed by the Operating Partnership.

In connection with the redemption of the Series G and Series H Preferred Stock, during the year ended December 31, 2017 we recorded non-cash charges of $7.6 million as a reduction to net income available to common unitholders for the original issuance costs of the Series H and Series G Preferred Stock.

XML

Deferred Revenue and Acquisition-Related Intangible Liabilities, net

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Deferred Revenue and Acquisition-Related Intangible Liabilities, net

Deferred Revenue and Acquisition-Related Intangible Liabilities, net

Deferred revenue and acquisition-related intangible liabilities, net consisted of the following at December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Deferred revenue related to tenant-funded tenant improvements	$	96,271	$	104,558
Other deferred revenue	19,125		15,950
Acquisition-related intangible liabilities, net (1)	24,092		29,138
Total	$	139,488	$149,646

________________________

(1) See Note 5 “Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net” for additional information regarding our acquisition-related intangible liabilities.

Deferred Revenue Related to Tenant-funded Tenant Improvements

During the years ended December 31, 2019, 2018, and 2017, $19.2 million, $18.4 million and $16.8 million, respectively, of deferred revenue related to tenant-funded tenant improvements was amortized and recognized as rental income. The following is the estimated amortization of deferred revenue related to tenant-funded tenant improvements as of December 31, 2019 for the next five years and thereafter:

Year Ending	(in thousands)
2020	$	16,935
2021	15,426
2022	14,320
2023	12,553
2024	10,318
Thereafter	26,719
Total	$	96,271

XML

Fair Value Measurements and Disclosures - Financial Instruments Disclosed at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Carrying value [Member] | Secured debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	$ 258,593	$ 335,531
Carrying value [Member] | Unsecured debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	3,049,185	2,552,070
Carrying value [Member] | Unsecured line of credit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	245,000	45,000
Fair value [Member] | Secured debt [Member] | Fair value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	272,997	335,885
Fair value [Member] | Unsecured debt [Member] | Fair value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	3,252,217	2,546,386
Fair value [Member] | Unsecured line of credit [Member] | Fair value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	$ 245,195	$ 45,058

XML

Schedule III - Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]

Schedule III - Real Estate and Accumulated Depreciation

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION

December 31, 2019

	Initial Cost									Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances			Land and improve- ments		Buildings and Improve- ments		Costs Capitalized Subsequent  to Acquisition/ Improvement		Land and improve- ments		Buildings and Improve- ments		Total		Accumulated Depreciation		Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
Office Properties:
3077-3243 S. La Cienega Blvd., Culver City, CA				$	150,718	$	31,032	$	2	$	150,718	$	31,034	$	181,752	$	1,227	35	2019	A	151,908
2240 E. Imperial Highway, El Segundo, CA				1,044		11,763		29,542		1,048		41,301		42,349		26,943		35	1983	C	122,870
2250 E. Imperial Highway, El Segundo, CA				2,579		29,062		36,294		2,547		65,388		67,935		54,789		35	1983	C	298,728
2260 E. Imperial Highway, El Segundo, CA				2,518		28,370		36,764		2,547		65,105		67,652		16,320		35	1983	C	298,728
909 N. Pacific Coast Highway, El Segundo, CA				3,577		34,042		50,104		3,577		84,146		87,723		41,765		35	2005	C	244,136
999 N. Pacific Coast Highway, El Segundo, CA				1,407		34,326		16,897		1,407		51,223		52,630		25,350		35	2003	C	128,588
6115 W. Sunset Blvd., Los Angeles, CA (4)				1,313		3		16,436		2,455		15,297		17,752		2,165		35	2015	C	26,105
6121 W. Sunset Blvd., Los Angeles, CA (4)				11,120		4,256		43,971		8,703		50,644		59,347		7,262		35	2015	C	91,173
1525 N. Gower St., Los Angeles, CA (4)				1,318		3		9,641		1,318		9,644		10,962		1,206		35	2016	C	9,610
1575 N. Gower St., Los Angeles, CA (4)				22,153		51		119,460		22,153		119,511		141,664		11,813		35	2016	C	251,245
1500 N. El Centro Ave., Los Angeles, CA (4)				9,235		21		58,603		9,235		58,624		67,859		6,208		35	2016	C	104,504
1550 N. El Centro Ave., Los Angeles, CA (4) (5)				16,970		39		135,847		16,970		135,886		152,856		13,895		35	2016	C	—
6255 W. Sunset Blvd., Los Angeles, CA				18,111		60,320		46,112		18,111		106,432		124,543		35,548		35	2012	A	323,920
3750 Kilroy Airport Way, Long Beach, CA				—		1,941		11,610		—		13,551		13,551		10,822		35	1989	C	10,457
3760 Kilroy Airport Way, Long Beach, CA				—		17,467		14,902		—		32,369		32,369		26,878		35	1989	C	165,278
3780 Kilroy Airport Way, Long Beach, CA				—		22,319		26,442		—		48,761		48,761		39,320		35	1989	C	221,452
3800 Kilroy Airport Way, Long Beach, CA				—		19,408		21,806		—		41,214		41,214		24,877		35	2000	C	192,476
3840 Kilroy Airport Way, Long Beach, CA				—		13,586		10,666		—		24,252		24,252		16,162		35	1999	C	136,026
3880 Kilroy Airport Way, Long Beach, CA				—		9,704		11,463		—		21,167		21,167		4,517		35	1997	A	96,035
3900 Kilroy Airport Way, Long Beach, CA				—		12,615		12,433		—		25,048		25,048		18,248		35	1997	A	129,893
Kilroy Airport Center, Phase IV, Long Beach, CA (6)				—		—		4,997		—		4,997		4,997		4,997		35	—		—
8560 W. Sunset Blvd., West Hollywood, CA				9,720		50,956		1,587		9,720		52,543		62,263		6,289		35	2016	A	71,875
8570 W Sunset Blvd., West Hollywood, CA				31,693		27,974		4,589		31,693		32,563		64,256		3,090		35	2016	A	43,603
8580 W. Sunset Blvd., West Hollywood, CA				10,013		3,695		648		10,013		4,343		14,356		392		35	2016	A	7,126
8590 W. Sunset Blvd., West Hollywood, CA				39,954		27,884		5,192		39,954		33,076		73,030		3,370		35	2016	A	56,095
12100 W. Olympic Blvd., Los Angeles, CA	$	170,000	(7)	352		45,611		18,617		9,633		54,947		64,580		29,197		35	2003	C	152,048
12200 W. Olympic Blvd., Los Angeles, CA			(7)	4,329		35,488		24,224		3,977		60,064		64,041		39,654		35	2000	C	150,832
12233 W. Olympic Blvd., Los Angeles, CA				22,100		53,170		4,676		22,100		57,846		79,946		14,055		35	2012	A	151,029
12312 W. Olympic Blvd., Los Angeles, CA			(7)	3,325		12,202		12,346		3,399		24,474		27,873		13,463		35	1997	A	76,644
1633 26th St., Santa Monica, CA				2,080		6,672		3,581		2,040		10,293		12,333		7,177		35	1997	A	43,857
2100/2110 Colorado Ave., Santa Monica, CA				5,474		26,087		14,678		5,476		40,763		46,239		25,730		35	1997	A	102,864
3130 Wilshire Blvd., Santa Monica, CA				8,921		6,579		16,799		9,188		23,111		32,299		15,989		35	1997	A	90,074
501 Santa Monica Blvd., Santa Monica, CA				4,547		12,044		15,889		4,551		27,929		32,480		17,346		35	1998	A	76,803

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

	Initial Cost					Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances		Land and improve- ments	Buildings and Improve- ments	Costs Capitalized Subsequent  to Acquisition/ Improvement	Land and improve- ments	Buildings and Improve- ments	Total	Accumulated Depreciation	Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
12225 El Camino Real, Del Mar, CA			1,700	9,633	3,714	1,673	13,374	15,047	9,224	35	1998	A	58,401
12235 El Camino Real, Del Mar, CA			1,507	8,543	9,022	1,540	17,532	19,072	10,435	35	1998	A	53,751
12340 El Camino Real, Del Mar, CA			4,201	13,896	11,660	4,201	25,556	29,757	12,128	35	2002	C	89,272
12390 El Camino Real, Del Mar, CA			3,453	11,981	8,804	3,453	20,785	24,238	9,540	35	2000	C	70,140
12348 High Bluff Dr., Del Mar, CA			1,629	3,096	6,323	1,629	9,419	11,048	6,636	35	1999	C	38,806
12400 High Bluff Dr., Del Mar, CA			15,167	40,497	14,473	15,167	54,970	70,137	28,866	35	2004	C	209,220
3579 Valley Centre Dr., Del Mar, CA			2,167	6,897	7,628	2,858	13,834	16,692	10,015	35	1999	C	54,960
3611 Valley Centre Dr., Del Mar, CA			4,184	19,352	19,881	5,259	38,158	43,417	25,713	35	2000	C	129,656
3661 Valley Centre Dr., Del Mar, CA			4,038	21,144	18,843	4,725	39,300	44,025	22,291	35	2001	C	128,364
3721 Valley Centre Dr., Del Mar, CA			4,297	18,967	14,705	4,254	33,715	37,969	17,509	35	2003	C	115,193
3811 Valley Centre Dr., Del Mar, CA			3,452	16,152	20,234	4,457	35,381	39,838	22,848	35	2000	C	112,067
12770 El Camino Real, Del Mar, CA			9,360	—	33,708	9,360	33,708	43,068	3,281	35	2015	C	73,032
12780 El Camino Real, Del Mar, CA			18,398	54,954	19,637	18,398	74,591	92,989	15,891	35	2013	A	140,591
12790 El Camino Real, Del Mar, CA			10,252	21,236	1,915	10,252	23,151	33,403	5,768	35	2013	A	78,836
3745 Paseo Place, Del Mar, CA (Retail) (8)			24,358	—	71,800	24,358	71,800	96,158	1,683	35	2019	C	—
3200 Paseo Village Way, San Diego, CA (Resi Phase I) (9)			40,186	—	102,749	40,186	102,749	142,935	937	35	2019	C	—
13280 Evening Creek Dr. South, I-15 Corridor, CA			3,701	8,398	4,729	3,701	13,127	16,828	5,809	35	2008	C	41,196
13290 Evening Creek Dr. South, I-15 Corridor, CA			5,229	11,871	6,128	5,229	17,999	23,228	6,797	35	2008	C	61,180
13480 Evening Creek Dr. South, I-15 Corridor, CA			7,997	—	52,826	7,997	52,826	60,823	20,167	35	2008	C	154,157
13500 Evening Creek Dr. South, I-15 Corridor, CA			7,581	35,903	18,106	7,581	54,009	61,590	22,402	35	2004	A	137,658
13520 Evening Creek Dr. South, I-15 Corridor, CA			7,580	35,903	17,778	7,580	53,681	61,261	24,885	35	2004	A	146,701
2305 Historic Decatur Rd., Point Loma, CA			5,240	22,220	7,309	5,240	29,529	34,769	10,801	35	2010	A	107,456
4690 Executive Dr., University Towne Centre, CA			1,623	7,926	3,722	1,623	11,648	13,271	7,829	35	1999	A	47,846
4100 Bohannon Dr., Menlo Park, CA		(10)	4,835	15,526	567	4,860	16,068	20,928	4,557	35	2012	A	47,379
4200 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	3,703	4,662	19,245	23,907	5,788	35	2012	A	45,451
4300 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,958	3,248	6,470	24,263	30,733	7,803	35	2012	A	63,079
4400 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	2,905	4,939	18,170	23,109	5,779	35	2012	A	48,146
4500 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,957	3,422	6,470	24,436	30,906	6,552	35	2012	A	63,078
4600 Bohannon Dr., Menlo Park, CA		(10)	4,798	15,406	3,571	4,939	18,836	23,775	5,660	35	2012	A	48,147
4700 Bohannon Dr., Menlo Park, CA		(10)	6,527	20,958	1,488	6,470	22,503	28,973	6,326	35	2012	A	63,078
1290 - 1300 Terra Bella Ave., Mountain View, CA			28,730	27,555	61	28,730	27,616	56,346	4,809	35	2016	A	114,175
331 Fairchild Dr., Mountain View, CA			18,396	17,712	7,962	18,396	25,674	44,070	5,575	35	2013	C	87,147
680 E. Middlefield Rd., Mountain View, CA			34,605	—	56,470	34,605	56,470	91,075	9,813	35	2014	C	170,090
690 E. Middlefield Rd., Mountain View, CA			34,755	—	56,713	34,755	56,713	91,468	9,855	35	2014	C	170,823
1701 Page Mill Rd., Palo Alto, CA			—	99,522	30	—	99,552	99,552	9,002	35	2016	A	128,688

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

	Initial Cost									Gross Amounts at Which Carried at Close of Period
Property Location	Encumb- rances			Land and improve- ments		Buildings and Improve- ments		Costs Capitalized Subsequent  to Acquisition/ Improvement		Land and improve- ments			Buildings and Improve- ments		Total		Accumulated Depreciation		Depreci- ation Life (1)	Date of Acquisition (A)/ Construction (C) (2)		Rentable Square Feet (3) (unaudited)
	($ in thousands)
3150 Porter Dr., Palo Alto, CA				—		21,715		4		—			21,719		21,719		2,387		35	2016	A	36,897
900 Jefferson Ave., Redwood City, CA (11)				16,668		—		109,375		18,063			107,980		126,043		15,824		35	2015	C	228,505
900 Middlefield Rd., Redwood City, CA (11)				7,959		—		50,114		8,626			49,447		58,073		6,941		35	2015	C	118,764
303 Second St., San Francisco, CA (12)				63,550		154,153		84,572		63,550			238,725		302,275		83,973		35	2010	A	784,658
100 First St., San Francisco, CA (13)				49,150		131,238		64,883		49,150			196,121		245,271		62,989		35	2010	A	467,095
250 Brannan St., San Francisco, CA				7,630		22,770		9,932		7,630			32,702		40,332		10,651		35	2011	A	100,850
201 Third St., San Francisco, CA				19,260		84,018		66,962		19,260			150,980		170,240		55,837		35	2011	A	346,538
301 Brannan St., San Francisco, CA				5,910		22,450		8,174		5,910			30,624		36,534		10,091		35	2011	A	82,834
360 Third St., San Francisco, CA				—		88,235		121,323		28,504			181,054		209,558		46,907		35	2011	A	429,796
333 Brannan St., San Francisco, CA				18,645		—		81,016		18,645			81,016		99,661		8,826		35	2016	C	185,602
350 Mission St., San Francisco, CA				52,815		—		213,450		52,815			213,450		266,265		24,500		35	2016	C	455,340
100 Hooper St., San Francisco, CA				78,564		—		196,251		88,510			186,305		274,815		5,978		35	2018	C	394,340
345 Brannan St., San Francisco, CA				29,405		113,179		1,322		29,403			114,503		143,906		3,697		35	2018	A	110,050
345 Oyster Point Blvd., South San Francisco, CA				13,745		18,575		1		13,745			18,576		32,321		1,167		35	2018	A	40,410
347 Oyster Point Blvd., South San Francisco, CA				14,071		18,289		44		14,071			18,333		32,404		1,150		35	2018	A	39,780
349 Oyster Point Blvd., South San Francisco, CA				23,112		22,601		324		23,112			22,925		46,037		1,926		35	2018	A	65,340
505 Mathilda Ave., Sunnyvale, CA				37,843		1,163		50,450		37,943			51,513		89,456		7,827		35	2014	C	212,322
555 Mathilda Ave., Sunnyvale, CA				37,843		1,163		50,447		37,943			51,510		89,453		7,827		35	2014	C	212,322
605 Mathilda Ave., Sunnyvale, CA				29,014		891		77,281		29,090			78,096		107,186		17,289		35	2014	C	162,785
599 Mathilda Ave., Sunnyvale, CA				13,538		12,559		139		13,538			12,698		26,236		4,147		35	2012	A	76,031
1800 Owens St., San Francisco, CA (14)				95,388		—		428,066		95,388			428,066		523,454		4,467		35	2019	C	—
601 108th Ave., Bellevue, WA				—		214,095		38,536		—			252,631		252,631		79,397		35	2011	A	488,470
10900 NE 4th St., Bellevue, WA				25,080		150,877		40,547		25,080			191,424		216,504		54,159		35	2012	A	428,557
837 N. 34th St., Lake Union, WA				—		37,404		4,950		—			42,354		42,354		11,132		35	2012	A	112,487
701 N. 34th St., Lake Union, WA				—		48,027		8,226		—			56,253		56,253		15,982		35	2012	A	141,860
801 N. 34 St., Lake Union, WA				—		58,537		17,222		—			75,759		75,759		16,318		35	2012	A	169,412
320 Westlake Ave. North, WA	89,502		(15)	14,710		82,018		14,378		14,710			96,396		111,106		19,817		35	2013	A	184,644
321 Terry Avenue North, Lake Union, WA			(15)	10,430		60,003		10,321		10,430			70,324		80,754		15,561		35	2013	A	135,755
401 Terry Avenue North, Lake Union, WA				22,500		77,046		13		22,500			77,059		99,559		15,556		35	2014	A	140,605
TOTAL OPERATING PROPERTIES	259,502			1,413,997		2,717,671		3,200,975		1,466,166		65	5,866,477		7,332,643		1,561,361					13,475,795
Undeveloped land and construction in progress	—			1,058,176		—		1,237,954		1,058,176			1,237,954		2,296,130		—					—
TOTAL ALL PROPERTIES	$	259,502	(16)	$	2,472,173	$	2,717,671	$	4,438,929	$	2,524,342		$	7,104,432	$	9,628,773	$	1,561,361				13,475,795

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

SCHEDULE III – REAL ESTATE AND ACCUMULATED DEPRECIATION – (Continued)

December 31, 2019

__________________

(1) The initial costs of buildings and improvements are depreciated over 35 years using a straight-line method of accounting; improvements capitalized subsequent to acquisition are depreciated over the shorter of the lease term or useful life, generally ranging from one to 20 years.

(2) Represents our date of construction or acquisition, or of our predecessor, the Kilroy Group.

(3) Includes square footage from our stabilized portfolio.

(4) These properties include the costs of a shared parking structure for a complex comprised of five office buildings and one residential tower. The costs of the parking structure are allocated amongst the six buildings.

(5) This property represents the 200-unit Columbia Square - Residential tower that stabilized in 2016.

(6) These costs represent infrastructure costs incurred in 1989. During the third quarter of 2009, we exercised our option to terminate the ground lease at Kilroy Airport Center, Phase IV in Long Beach, California. We had previously leased this land, which is adjacent to our Office Properties at Kilroy Airport Center, Long Beach, for potential future development opportunities.

(7) These properties secure a $170.0 million mortgage note.

(8) This property is currently in the tenant improvement phase of our in-process development projects and not yet in the stabilized portfolio. The estimated rentable square feet for this property is 96,000 rentable square feet.

(9) This property represents the first completed phase of the One Paseo residential property containing 237 units.

(10) These properties secure intercompany promissory notes between KRLP and the consolidated property partnerships.

(11) These properties are owned by Redwood City Partners LLC, a consolidated property partnership.

(12) This property is owned by 303 Second Street Member LLC, a consolidated property partnership.

(13) This property is owned by 100 First Street Member LLC, a consolidated property partnership.

(14) This property is currently in the tenant improvement phase of our in-process development projects and not yet in the stabilized portfolio. The estimated rentable square feet for this property is 750,000 rentable square feet.

(15) These properties secure a $89.5 million mortgage note.

(16)

Represents gross aggregate principal amount before the effect of the deferred financing costs of $0.9 million as of December 31, 2019.units.

As of December 31, 2019, the aggregate gross cost of property included above for federal income tax purposes approximated $7.9 billion. This amount excludes approximately $0.2 billion of gross costs attributable to properties held in VIEs at December 31, 2019 to facilitate potential future Section 1031 Exchanges.

The following table reconciles the historical cost of total real estate held for investment from January 1, 2017 to December 31, 2019:

	Year Ended December 31,
	2019			2018 (1)			2017
	(in thousands)
Total real estate held for investment, beginning of year	$	8,426,632		$	7,417,777		$	7,060,754
Additions during period:
Acquisitions	460,512			581,671			19,829
Improvements, etc.	890,654			724,016			533,939
Total additions during period	1,351,166			1,305,687			553,768
Deductions during period:
Cost of real estate sold	(120,788		)	(286,623		)	(191,610		)
Other	(28,237		)	(10,209		)	(5,135		)
Total deductions during period	(149,025		)	(296,832		)	(196,745		)
Total real estate held for investment, end of year	$	9,628,773		$	8,426,632		$	7,417,777

__________________

(1) Amounts presented in Improvements, etc. and Other have been revised for the year ended December 31, 2018 to conform to the current year presentation with amounts transferred from undeveloped land and construction in progress to land and improvements and buildings and improvements presented on a net basis, which did not have any impact on total real estate held for investment at December 31, 2018.

The following table reconciles the accumulated depreciation from January 1, 2017 to December 31, 2019:

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Accumulated depreciation, beginning of year	$	1,391,368		$	1,264,162		$	1,139,853
Additions during period:
Depreciation of real estate	211,893			198,578			190,515
Total additions during period	211,893			198,578			190,515
Deductions during period:
Write-offs due to sale	(41,655		)	(71,372		)	(66,206		)
Properties held for sale	—			—			—
Other	(245		)	—			—
Total deductions during period	(41,900		)	(71,372		)	(66,206		)
Accumulated depreciation, end of year	$	1,561,361		$	1,391,368		$	1,264,162

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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2019

Asset Acquisitions [Abstract]

Schedule of Acquisitions

The acquisitions were funded from various sources of liquidity including proceeds from the Company’s unsecured revolving credit facility, the issuance of debt and the settlement of the Company’s 2018 forward equity sales agreements. During the year ended December 31, 2018, we acquired a development site adjacent to the three operating properties we acquired in January 2018, from an unrelated third party. The acquisition was funded with proceeds from the Company’s unsecured revolving credit facility and the Company’s at-the-market stock offering program.

Project	Date of Acquisition	City/Submarket	Purchase Price (in millions)
2019 Acquisitions
1335 Broadway & 901 Park Boulevard, San Diego, CA (1)	August 19, 2019	East Village	$	40.0
Seattle CBD Project (2)	December 12, 2019	Seattle CBD	133.0
Total 2019 Acquisitions			$	173.0
2018 Acquisitions
Kilroy Oyster Point (3)	June 1, 2018	South San Francisco	$	308.2
Total 2018 Acquisitions			$	308.2

________________________ 

(1) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $4.0 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

(2) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $6.3 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets. In addition, as of December 31, 2019, the Company had $10.0 million in restricted cash, which is excluded from the purchase price above, related to this acquisition which may be payable to the seller only if certain events occur within three years following the date of acquisition.

(3) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $40.6 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2018, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

December 31, 2019, we acquired the 19-building creative office campus listed below in one transaction from an unrelated third party. During the year ended December 31, 2018, we acquired the four operating properties listed below in two transactions from unrelated third parties.

Property	Date of Acquisition	Number of Buildings	Rentable Square Feet (unaudited)	Occupancy as of December 31, 2019 (unaudited)		Purchase Price (in millions) (1)
2019 Acquisitions
3101-3243 La Cienega Boulevard, Culver City, CA (2)	October 15, 2019	19	151,908	100.0	%	$	186.0
2018 Acquisitions
345, 347 & 349 Oyster Point Boulevard, South San Francisco, CA	January 31, 2018	3	145,530	100.0	%	$	111.0
345 Brannan Street, San Francisco, CA (3)	December 21, 2018	1	110,050	99.7	%	146.0
Total (4)		4	255,580			$	257.0

________________________ 

(1) Excludes acquisition-related costs.

(2) The results of operations for the properties acquired during 2019 contributed $3.7 million to revenue and a net loss of $0.1 million primarily due to a write-off of lease-related intangible assets as a result of an early lease termination.

(3) At December 31, 2018, this property was temporarily being held in a separate VIE to facilitate potential Section 1031 Exchanges. During January 2019, the Company completed the Section 1031 Exchange related to this VIE.

(4) The results of operations for the properties acquired during 2018 contributed $8.0 million and $1.7 million to revenue and net income, respectively, for the year ended December 31, 2018.

Schedule of estimated fair values of the assets acquired and liabilities assumed

The related assets, liabilities and results of operations of the acquired properties are included in the consolidated financial statements as of the date of acquisition. The following table summarizes the estimated fair values of the assets and liabilities assumed at the respective acquisition dates for our 2019 and 2018 operating property acquisitions, respectively:

	Total 2019 Operating Property Acquisitions (1)		Total 2018 Operating Property Acquisitions (2)
Assets
Land and improvements	$	150,561	$	80,269
Buildings and improvements (3)	30,932		172,059
Deferred leasing costs and acquisition-related intangible assets (4)	12,063		13,593
Right of use ground lease asset (5)	13,334		—
Total assets acquired	$	206,890	$	265,921
Liabilities
Acquisition-related intangible liabilities (6)	$	9,950	$	8,921
Ground lease liability (5)	10,940		—
Total liabilities assumed	$	20,890	$	8,921
Net assets and liabilities acquired	$	186,000	$	257,000

________________________ 

(1) The purchase price of the acquisition completed during the year ended December 31, 2019 was less than 10% of the Company’s total assets as of December 31, 2018.

(2) The purchase price of the two acquisitions completed during the year ended December 31, 2018 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2017.

(3) Represents buildings, building improvements and tenant improvements.

(4) For the 2019 operating property acquisition, represents in-place leases (approximately $9.2 million with a weighted average amortization period of 3.3 years) and leasing commissions (approximately $2.9 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents in-place leases (approximately $11.8 million with a weighted average amortization period of 1.3 years) and leasing commissions (approximately $1.8 million with a weighted average amortization period of 6.6 years).

(5) We evaluated the ground lease assumed in connection with the 2019 operating property acquisition and concluded it met the criteria to be classified as an operating lease. The discount rate used in determining the present value of the minimum future lease payments was 4.79%. The right of use asset ground lease asset is equal to the ground lease liability adjusted for above and below market intangibles and deferred leasing costs. Refer to Note 18 “Commitments and Contingencies” for further discussion of the Company's ground lease obligations.

(6) For the 2019 operating property acquisition, represents below-market leases (approximately $10.0 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents below-market leases (approximately $8.9 million with a weighted average amortization period of 9.8 years).

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Tax Treatment of Distributions (Tables)

12 Months Ended

Dec. 31, 2019

Class of Stock [Line Items]

Reconciliation of dividends declared to dividends paid

The following table reconciles the dividends declared per share of common stock to the dividends paid per share of common stock during the years ended December 31, 2019, 2018 and 2017 as follows: 

	Year Ended December 31,
Dividends	2019			2018			2017
Dividends declared per share of common stock	$	1.910		$	1.790		$	1.650
Less: Dividends declared in the current year and paid in the following year	(0.485		)	(0.455		)	(0.425		)
Add: Dividends declared in the prior year and paid in the current year (1)	0.455			0.425			2.275
Dividends paid per share of common stock	$	1.880		$	1.760		$	3.500

_________________

(1) The fourth quarter 2016 dividend of $2.275 per share of common stock consists of a special cash dividend of $1.90 per share of common stock and a regular quarterly cash dividend of $0.375 per share of common stock. The $1.90 per share special distribution is treated as paid in two tax years for income tax purposes: $1.587 is treated as paid on December 31, 2016 and $0.313 is treated as paid on January 13, 2017. The $0.375 per share regular quarterly distribution is considered a 2017 dividend distribution for income tax purposes.

Common Stock [Member]

Class of Stock [Line Items]

Reconciliation of dividends declared to dividends paid

The unaudited income tax treatment for the dividends to common stockholders reportable for the years ended December 31, 2019, 2018 and 2017 as identified in the table above was as follows: 

	Year Ended December 31,
Shares of Common Stock	2019				2018				2017
Ordinary income (1)	$	0.939	49.95	%	$	1.474	83.73	%	$	1.356	70.87	%
Qualified dividend	0.004		0.21		0.003		0.19		0.002		0.11
Return of capital	0.312		16.62		0.275		15.64		0.344		18.00
Capital gains (2)	0.600		31.93		0.008		0.44		—		—
Unrecaptured section 1250 gains	0.025		1.29		—		—		0.211		11.02
	$	1.880	100.00	%	$	1.760	100.00	%	$	1.913	100.00	%

_________________

(1) The Tax Cuts and Jobs Act enacted on December 22, 2017 generally allows a deduction for noncorporate taxpayers equal to 20% of ordinary dividends distributed by a REIT (excluding capital gain dividends and qualified dividend income). The amount of dividend eligible for this deduction is referred to as the Section 199A Dividend.  For the year ended December 31, 2019, the Section 199A Dividend is equal to the total ordinary income dividend.

(2)

Capital gains are comprised entirely of 20% rate gains.

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Partners' Capital of the Operating Partnership - Narrative (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Aug. 15, 2017	Mar. 30, 2017	Jul. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common stock, shares issued (in shares)				106,016,287	100,746,988
Aggregate net proceeds after selling commissions				$ 353,722	$ 130,693	$ 326,058
Original issuance costs of redeemed preferred stock and preferred units (Note 13)				$ 0	$ 0	(7,589)
Series H Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock (in shares)	4,000,000	4,000,000
Preferred stock, dividend rate	6.375%
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock (in shares)		4,000,000
Preferred stock, dividend rate		6.875%
Series G And H Preferred Stock [Member]
Class of Stock [Line Items]
Original issuance costs of redeemed preferred stock and preferred units (Note 13)						$ (7,600)
Forward Equity Sale [Member]
Class of Stock [Line Items]
Aggregate net proceeds after selling commissions			$ 354,300
Forward Equity Sale [Member] | Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares issued (in shares)			5,000,000
Aggregate net proceeds after selling commissions			$ 354,300
Common units (in units)			5,000,000

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Noncontrolling Interests on the Company’s Consolidated Financial Statements - Narrative (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) d $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares
Noncontrolling Interest [Line Items]
Ownership interest of noncontrolling interest	1.90%	2.00%
Conversion ratio	1
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Trading days | d	10
Aggregate value upon redemption of outstanding noncontrolling common units	$ 167,700	$ 126,400
Noncontrolling interest in consolidated subsidiary	195,431	192,363
100 First LLC & 303 Second LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest in consolidated subsidiary		186,400
Redwood LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest in consolidated subsidiary	$ 5,800	$ 6,000
Common units [Member] | Kilroy Realty L.P. [Member]
Noncontrolling Interest [Line Items]
Common units outstanding held by common limited partners (in units) | shares	2,023,287	2,025,287
Exchange of common units of the Operating Partnership (in units) | shares	2,000
Conversion ratio	1
Operating Partnership [Member]
Noncontrolling Interest [Line Items]
Ownership interest	98.10%	98.00%
101 First LLC and 303 Second LLC [Member]
Noncontrolling Interest [Line Items]
Ownership interest	56.00%
Noncontrolling interest in consolidated subsidiary	$ 189,600	$ 186,400

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Net Income Available to Common Stockholders Per Share of the Company (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Net income available to common stockholders

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	195,443		$	258,415		$	164,612
Total preferred dividends	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common stockholders	$	193,324		$	256,411		$	149,274
Denominator:
Basic weighted average vested shares outstanding	103,200,568			99,972,359			98,113,561
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested shares and common stock equivalents outstanding	103,849,168			100,482,365			98,727,331
Basic earnings per share:
Net income available to common stockholders per share	$	1.87		$	2.56		$	1.52
Diluted earnings per share:
Net income available to common stockholders per share	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

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Share-Based and Other Compensation - 2018 Special Market-Based RSU Grant (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Dec. 27, 2018	Dec. 31, 2018	Dec. 31, 2018
December 2018 Market-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		346,777
Award vesting period		3 years
Vesting criteria, one		75.00%	75.00%
Vesting criteria, two		25.00%	25.00%
Fair value RSUs granted	$ 23.8
Fair value per share on valuation date (in dollars per share)	$ 68.66		$ 68.66
Expected share price volatility (in dollars per share)	23.00%
Risk-free interest rate	2.40%
December 2018 Market-Based RSUs, TSR [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
Minimum [Member] | December 2018 Market-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target percent		0.00%
Maximum [Member] | December 2018 Market-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target percent		200.00%

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Organization and Ownership - Narrative (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019 building	Dec. 31, 2019 property	Dec. 31, 2019 ft²	Dec. 31, 2019	Dec. 31, 2019 a	Dec. 31, 2019 property_partnership	Dec. 31, 2019 project	Dec. 31, 2018
Real Estate Properties [Line Items]
Lease-up properties occupancy percentage	95.00%
Lease-up properties occupancy duration	1 year
Ownership interest of noncontrolling interest					1.90%				2.00%
Kilroy Realty Finance, Inc. [Member]
Real Estate Properties [Line Items]
Common general partnership interest in the Finance Partnership (percentage)		1.00%
101 First LLC and 303 Second LLC [Member]
Real Estate Properties [Line Items]
Ownership interest					56.00%
Redwood LLC [Member]
Real Estate Properties [Line Items]
Ownership interest					93.00%
Operating Partnership [Member]
Real Estate Properties [Line Items]
Ownership interest					98.10%				98.00%
Finance Partnership [Member] | Operating Partnership [Member]
Real Estate Properties [Line Items]
Ownership interest		99.00%
Washington [Member]
Real Estate Properties [Line Items]
Number of properties		1	8
Number of development projects | project								1
Development properties [Member]
Real Estate Properties [Line Items]
Number of properties							3	2
Area of undeveloped land | a						61
Development properties [Member] | 101 First LLC and 303 Second LLC [Member]
Real Estate Properties [Line Items]
Number of properties | property_partnership							2
Office properties [Member]
Real Estate Properties [Line Items]
Number of properties		112	4
Office properties [Member] | San Francisco, California [Member] | 101 First LLC and 303 Second LLC [Member]
Real Estate Properties [Line Items]
Number of properties			1
Office properties [Member] | Redwood City, California [Member] | Redwood LLC [Member]
Real Estate Properties [Line Items]
Number of properties			2
Development sites [Member]
Real Estate Properties [Line Items]
Number of properties | project								5
Properties and development projects [Member]
Real Estate Properties [Line Items]
Property ownership percentage		100.00%
Development Project in San Francisco [Member] | Development properties [Member] | San Francisco, California [Member]
Real Estate Properties [Line Items]
Number of properties			1
Development Project in San Francisco [Member] | Office properties [Member] | San Francisco, California [Member]
Real Estate Properties [Line Items]
Area of real estate property | ft²				394,340

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Net Income Available to Common Unitholders Per Unit of the Operating Partnership - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income attributable to Kilroy Realty, L.P.									$ 195,443	$ 258,415	$ 164,612
Preferred dividends and distributions									0	0	(13,363)
Allocation to participating securities									(2,119)	(2,004)	(1,975)
Numerator for basic and diluted net income available to common stockholders									$ 193,324	$ 256,411	$ 149,274
Denominator:
Basic weighted average vested shares/units outstanding (in shares/units)									103,200,568	99,972,359	98,113,561
Effect of dilutive securities (in units)									648,600	510,006	613,770
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares/units)									103,849,168	100,482,365	98,727,331
Basic earnings per unit:
Net income available to common unitholders per unit - basic (in dollars per unit)	$ 0.68	$ 0.41	$ 0.41	$ 0.36	$ 1.59	$ 0.34	$ 0.27	$ 0.36	$ 1.87	$ 2.56	$ 1.52
Diluted earnings per unit:
Net income available to common unitholders per unit - diluted (in dollars per unit)	0.67	0.41	0.41	0.36	1.58	0.33	0.27	0.36	$ 1.86	$ 2.55	$ 1.51
Kilroy Realty L.P. [Member]
Numerator:
Net income attributable to Kilroy Realty, L.P.									$ 198,738	$ 263,210	$ 167,440
Preferred dividends and distributions									0	0	(13,363)
Allocation to participating securities									(2,119)	(2,004)	(1,975)
Numerator for basic and diluted net income available to common stockholders									$ 196,619	$ 261,206	$ 152,102
Denominator:
Basic weighted average vested shares/units outstanding (in shares/units)									105,223,975	102,025,276	100,246,567
Effect of dilutive securities (in units)									648,600	510,006	613,770
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares/units)									105,872,575	102,535,282	100,860,337
Basic earnings per unit:
Net income available to common unitholders per unit - basic (in dollars per unit)	0.68	0.41	0.41	0.36	1.58	0.34	0.27	0.36	$ 1.87	$ 2.56	$ 1.52
Diluted earnings per unit:
Net income available to common unitholders per unit - diluted (in dollars per unit)	$ 0.67	$ 0.41	$ 0.41	$ 0.36	$ 1.57	$ 0.33	$ 0.27	$ 0.36	$ 1.86	$ 2.55	$ 1.51

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Stockholders' Equity of the Company

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Stockholders' Equity of the Company

Stockholders’ Equity of the Company

Common Stock

2018 Common Stock Forward Equity Sale Agreements

In August 2018, the Company entered into forward equity sale agreements with certain financial institutions acting as forward purchasers in connection with an offering of 5,000,000 shares of common stock at an initial gross offering price of $360.5 million, or $72.10 per share, before underwriting discounts, commissions and offering expenses. The forward purchasers borrowed and sold an aggregate of 5,000,000 shares of common stock in the offering. The Company did not receive any proceeds from the sale of its shares of common stock by the forward purchasers at the time of the offering.

In July 2019, the Company physically settled these forward equity sale agreements. Upon settlement, the Company issued 5,000,000 shares of common stock for net proceeds of $354.3 million and contributed the net proceeds to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

At-The-Market Stock Offering Programs

Under our at-the-market stock offering programs, which commenced in December 2014 and June 2018, we may offer and sell shares of our common stock from time to time in “at-the-market” offerings. During the year ended December 31, 2018, the Company completed its existing at-the-market stock offering program (the “2014 At-The-Market Program”) under which we sold an aggregate of $300.0 million in gross sales of shares. In June 2018, the Company commenced a new at-the-market stock offering program (the “2018 At-The-Market Program”) under which we may offer and sell shares of our common stock with an aggregate gross sales price of up to $500.0 million. In connection with the 2018 At-The-Market Program, the Company may also, at its discretion, enter into forward equity sale agreements. The use of forward equity sale agreements would allow the Company to lock in a share price on the sale of shares of our common stock at the time an agreement is executed, but defer receiving the proceeds from the sale of shares until a later date.

During the year ended December 31, 2019, we executed various 12-month forward equity sale agreements under the 2018 Program with financial institutions acting as forward purchasers to sell 3,147,110 shares of common stock at a weighted average sales price of $80.08 per share before underwriting discounts, commissions and offering expenses. The Company did not directly sell any shares of our common stock under the 2018 At-The-Market Program during the year and did not receive any proceeds from the sale of its shares of common stock by the forward purchasers. The Company currently expects to fully physically settle the forward equity sale agreements and receive cash proceeds upon one or more settlement dates, at the Company’s discretion, prior to the final settlement dates in the first quarter of 2020 through the first quarter of 2021, at which time we expect to receive aggregate net cash proceeds at settlement equal to the number of shares specified in such forward equity sale agreement multiplied by the relevant forward price per share. The weighted average forward sale price that we expect to receive upon physical settlement of the agreements will be subject to adjustment for (i) a floating interest rate factor equal to a specified daily rate less a spread, (ii) the forward purchasers’ stock borrowing costs and (iii) scheduled dividends during the term of the agreements. We have not settled any portion of these forward equity sale agreements as of the date of this filing. Upon physical settlement, the Company will contribute the net proceeds from the issuance of shares of our common stock to the Operating Partnership in exchange for an equal number of units in the Operating Partnership.

During the year ended December 31, 2018, we sold 447,466 shares of common stock under the 2018 At-The-Market Program and 1,369,729 shares of common stock under the 2014 At-The-Market Program.

Since commencement of the 2018 At-The-Market Program through December 31, 2019, we have directly sold 447,466 shares of common stock, and an additional 3,147,110 shares have been sold by forward purchasers under forward equity sale agreements, which have not been settled as of the date of this filing. As of December 31, 2019, approximately $214.2 million remains available to be sold under this program. Actual future sales will depend upon a variety of factors, including, but not limited to, market conditions, the trading price of the Company’s common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under this program.

The following table sets forth information regarding direct sales of our common stock under our at-the-market offering programs for the years ended December 31, 2018 and 2017:

	Year Ended December 31,
	2018		2017
	(in millions, except share data)
Shares of common stock sold during the period	1,817,195		235,077
Weighted average price per share of common stock	$	73.64	$	75.40
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

The proceeds from sales were used to fund acquisitions, development expenditures and general corporate purposes including repayment of borrowings under the unsecured revolving credit facility.

Common Stock Repurchases

An aggregate of 4,935,826 shares currently remain eligible for repurchase under a share repurchase program approved by the Company’s board of directors in 2016. The Company did not repurchase shares of common stock under this program during the three years ended December 31, 2019, 2018 and 2017.

Accrued Dividends and Distributions

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock and noncontrolling units as of December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	51,418	$	45,840
Noncontrolling common unitholders of the Operating Partnership	981		922
RSU holders (1)	820		797
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	$	53,219	$	47,559

______________________

(1) The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

	December 31,
	2019	2018
Outstanding Shares and Units:
Common stock (1)	106,016,287	100,746,988
Noncontrolling common units	2,023,287	2,025,287
RSUs (2)	1,651,905	1,711,628

______________________

(1) The amount includes nonvested shares.

(2) The amount includes nonvested RSUs. Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

Preferred Stock

On August 15, 2017, the Company redeemed all 4,000,000 shares of its 6.375% Series H Cumulative Redeemable Preferred Stock (“Series H Preferred Stock”). The shares of Series H Preferred Stock were redeemed at a redemption price equal to their stated liquidation preference of $25.00 per share, representing $100.0 million in aggregate. The redemption payment did not include any additional accrued dividends because the redemption date was also the dividend payment date.

On March 30, 2017 (the “Series G Redemption Date”), the Company redeemed all 4,000,000 shares of its 6.875% Series G Cumulative Redeemable Preferred Stock (“Series G Preferred Stock”). The shares of Series G Preferred Stock were redeemed at a redemption price equal to their stated liquidation preference of $25.00 per share, representing $100.0 million in aggregate, plus all accrued and unpaid dividends to the Series G Redemption Date.

In connection with the redemption of the Series G and Series H Preferred Stock, during the year ended December 31, 2017 we recorded non-cash charges of $7.6 million as a reduction to net income available to common stockholders for the original issuance costs of the Series H and Series G Preferred Stock.

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Secured and Unsecured Debt of the Operating Partnership

12 Months Ended

Dec. 31, 2019

Debt Instrument [Line Items]

Secured and Unsecured Debt of the Operating Partnership

Secured and Unsecured Debt of the Company

In this Note 8, the “Company” refers solely to Kilroy Realty Corporation and not to any of our subsidiaries. The Company itself does not hold any indebtedness. All of our secured and unsecured debt is held directly by the Operating Partnership.

The Company generally guarantees all the Operating Partnership’s unsecured debt obligations including the unsecured revolving credit facility, the $150.0 million unsecured term loan facility and all of the unsecured senior notes. At December 31, 2019 and 2018, the Operating Partnership had $3.3 billion and $2.6 billion, respectively, outstanding in total, including unamortized discounts and deferred financing costs, under these unsecured debt obligations.

In addition, although the remaining $0.3 billion of the Operating Partnership’s debt as of December 31, 2019 and 2018, is secured and non-recourse to the Company, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

Debt Covenants and Restrictions

One of the covenants contained within the unsecured revolving credit facility and the unsecured term loan facility as discussed further below in Note 9 prohibits the Company from paying dividends during an event of default in excess of an amount which results in distributions to us in an amount sufficient to permit us to pay dividends to our stockholders that we reasonably believe are necessary to (a) maintain our qualification as a REIT for federal and state income tax purposes and (b) avoid the payment of federal or state income or excise tax.

Kilroy Realty L.P. [Member]

Debt Instrument [Line Items]

Secured and Unsecured Debt of the Operating Partnership

Secured and Unsecured Debt of the Operating Partnership

Secured Debt

The following table sets forth the composition of our secured debt as of December 31, 2019 and 2018:

	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	December 31,
Type of Debt				2019			2018
				(in thousands)
Mortgage note payable	3.57%	3.57%	December 2026	$	170,000		$	170,000
Mortgage note payable (3)	4.48%	4.48%	July 2027	89,502			91,332
Mortgage note payable (3)(4)	6.05%	3.50%	June 2019	—			75,238
Total secured debt				$	259,502		$	336,570
Unamortized Deferred Financing Costs				(909		)	(1,039		)
Total secured debt, net				$	258,593		$	335,531

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) Represents the effective interest rate including the amortization of initial issuance discounts/premiums excluding the amortization of deferred financing costs.

(3) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

(4) In February 2019, the Company repaid this mortgage note payable at par.

The Operating Partnership’s secured debt was collateralized by operating properties with a combined net book value of approximately $251.2 million as of December 31, 2019.

Although our mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

As of December 31, 2019, all of the Operating Partnership’s secured loans contained restrictions that would require the payment of prepayment penalties for the acceleration of outstanding debt. The mortgage notes payable are secured

by deeds of trust on certain of our properties and the assignment of certain rents and leases associated with those properties.

Unsecured Senior Notes

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership and outstanding, including unamortized discounts of $6.5 million and $6.6 million and unamortized deferred financing costs of $18.7 million and $15.4 million as of December 31, 2019 and 2018, respectively:

					Net Carrying Amount as of December 31,
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	2019			2018
					(in thousands)
3.050% Unsecured Senior Notes (2)	September 2019	February 2030	3.050%	3.064%	$	500,000		$	—
Unamortized discount and deferred financing costs					(5,998		)	—
Net carrying amount					$	494,002		$	—
4.750% Unsecured Senior Notes (3)	November 2018	December 2028	4.750%	4.800%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(4,446		)	(4,960		)
Net carrying amount					$	395,554		$	395,040
4.350% Unsecured Senior Notes (4)	October 2018	October 2026	4.350%	4.350%	$	200,000		$	200,000
Unamortized discount and deferred financing costs					(1,186		)	(1,375		)
Net carrying amount					$	198,814		$	198,625
4.300% Unsecured Senior Notes (4)	July 2018	July 2026	4.300%	4.300%	$	50,000		$	50,000
Unamortized discount and deferred financing costs					(290		)	(342		)
Net carrying amount					$	49,710		$	49,658
3.450% Unsecured Senior Notes (5)	December 2017	December 2024	3.450%	3.470%	$	425,000		$	425,000
Unamortized discount and deferred financing costs					(2,907		)	(3,493		)
Net carrying amount					$	422,093		$	421,507
3.450% Unsecured Senior Notes (6)	February 2017	February 2029	3.450%	3.450%	$	75,000		$	75,000
Unamortized discount and deferred financing costs					(390		)	(432		)
Net carrying amount					$	74,610		$	74,568
3.350% Unsecured Senior Notes (6)	February 2017	February 2027	3.350%	3.350%	$	175,000		$	175,000
Unamortized discount and deferred financing costs					(825		)	(941		)
Net carrying amount					$	174,175		$	174,059
4.375% Unsecured Senior Notes (7)	September 2015	October 2025	4.375%	4.444%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(3,185		)	(3,738		)
Net carrying amount					$	396,815		$	396,262
4.250% Unsecured Senior Notes (8)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(5,100		)	(5,632		)
Net carrying amount					$	394,900		$	394,368
3.800% Unsecured Senior Notes (9)	January 2013	January 2023	3.800%	3.800%	$	300,000		$	300,000
Unamortized discount and deferred financing costs					(834		)	(1,108		)
Net carrying amount					$	299,166		$	298,892
Total Unsecured Senior Notes, Net					$	2,899,839		$	2,402,979

________________________

(1) Represents the effective interest rate including the amortization of initial issuance discounts, excluding the amortization of deferred financing costs.

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year, beginning on February 15, 2020.

(3) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on April 18th and October 18th of each year.

(5) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(6) Interest on these notes is payable semi-annually in arrears on February 17th and August 17th of each year.

(7) Interest on these notes is payable semi-annually in arrears on April 1st and October 1st of each year.

(8) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(9) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

Unsecured Senior Notes - Registered Offerings

In September 2019, the Operating Partnership issued $500.0 million of aggregate principal amount of unsecured senior notes in a registered public offering. The outstanding balance of the unsecured senior notes is included in unsecured debt, net of an initial issuance discount of $0.6 million, on our consolidated balance sheets. The unsecured senior notes, which are scheduled to mature on February 15, 2030, require semi-annual interest payments each February and August based on a stated annual interest rate of 3.050%. The Operating Partnership may redeem the notes at any time prior to February 15, 2030, either in whole or in part, subject to the payment of an early redemption premium prior to a par call option period commencing three months prior to maturity.

In November 2018, the Operating Partnership issued $400.0 million of aggregate principal amount of unsecured senior notes in a registered public offering. The outstanding balance of the unsecured senior notes is included in unsecured debt, net of initial issuance discount of $1.5 million, on our consolidated balance sheets. The unsecured senior notes, which are scheduled to mature on December 15, 2028, require semi-annual interest payments each June and December based on a stated annual interest rate of 4.750%. The Operating Partnership may redeem the notes at any time prior to December 15, 2028, either in whole or in part, subject to the payment of an early redemption premium subject to a par call option.

In December 2018, we used a portion of the net proceeds from the issuance of our $400.0 million, 4.750% unsecured senior notes to early redeem, at our option, the $250.0 million aggregate principal amount of our outstanding 6.625% unsecured senior notes that were scheduled to mature on June 1, 2020. In connection with our early redemption, we incurred a $12.6 million loss on early extinguishment of debt comprised of an $11.8 million premium paid to the note holders at the redemption date and a $0.8 million write-off of the unamortized discount and unamortized deferred financing costs.

Unsecured Senior Notes - Private Placement

In May 2018, the Operating Partnership entered into a note purchase agreement in a private placement (the “2018 Note Purchase Agreement”) in connection with the issuance and sale of $50.0 million principal amount of the Operating Partnership’s 4.30% Senior Notes, Series A, due July 18, 2026 (the “Series A Notes due 2026”), and $200.0 million principal amount of the Operating Partnership’s 4.35% Senior Notes, Series B, due October 18, 2026 (the “Series B Notes due 2026” and, together with the Series A Notes, the “Series A and B Notes due 2026”), as shown in the table above. The Company drew the full amount of the Series A Notes due 2026 on July 18, 2018. On October 22, 2018, the Company drew the full amount of the Series B Notes due 2026. The Series A and B Notes due 2026 mature on their respective due dates, unless earlier redeemed or prepaid pursuant to the terms of the 2018 Note Purchase Agreement. Interest on the Series A and B Notes due 2026 is payable semi-annually in arrears on April 18 and October 18 of each year beginning April 18, 2019. As of December 31, 2019, there was $50.0 million and $200.0 million issued and outstanding aggregate principal amount of Series A and Series B Notes due 2026, respectively.

The Operating Partnership may, at its option and upon notice to the purchasers of the Series A and B Notes due 2026, prepay at any time all, or from time to time any part of the principal amounts then outstanding (in an amount not less than 5% of the aggregate principal amount of the Series A and B Notes due 2026 then outstanding in the case of a partial prepayment), at 100% of the principal amount so prepaid, plus the make-whole amount determined for the prepayment date with respect to such principal amount as set forth in the 2018 Note Purchase Agreement.

In connection with the issuance of the Series A and B Notes due 2026, the Company entered into an agreement whereby it will guarantee the payment by the Operating Partnership of all amounts due with respect to the Series A and B Notes due 2026 and the performance by the Operating Partnership of its obligations under the 2018 Note Purchase Agreement.

Unsecured Revolving Credit Facility and Term Loan Facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	245,000		$	45,000
Remaining borrowing capacity	505,000			705,000
Total borrowing capacity (1)	$	750,000		$	750,000
Interest rate (2)	2.76		%	3.48		%
Facility fee-annual rate (3)	0.200%
Maturity date	July 2022

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $600.0 million under an accordion feature under the terms of the unsecured revolving credit facility and unsecured term loan facility.

(2) Our unsecured revolving credit facility interest rate was calculated based on the contractual rate of LIBOR plus 1.000% as of December 31, 2019 and 2018.

(3) Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of December 31, 2019 and 2018, $3.4 million and $4.7 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility.

The Company intends to borrow under the unsecured revolving credit facility from time to time for general corporate purposes, to finance development and redevelopment expenditures, to fund potential acquisitions and to potentially repay long-term debt.

During the first quarter of 2018, we borrowed the full $150.0 million borrowing capacity of our unsecured term loan facility. In connection with the funding of the outstanding borrowings, we transferred $30.0 million of outstanding borrowings under the unsecured revolving credit facility to the balance of our unsecured term loan facility. As a result, only $120.0 million of cash proceeds were received from the funding of the unsecured term loan facility. The following table summarizes the balance and terms of our unsecured term loan facility as of December 31, 2019 and 2018, which is included in unsecured debt, net on our consolidated balance sheets:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Remaining borrowing capacity	—			—
Total borrowing capacity (1)	$	150,000		$	150,000
Interest rate (2)	2.85		%	3.49		%
Undrawn facility fee-annual rate	0.200%
Maturity date	July 2022

_______________

(1) As of December 31, 2019 and 2018, $0.7 million and $0.9 million of unamortized deferred financing costs, respectively, remained to be amortized through the maturity date of our unsecured term loan facility.

(2) Our unsecured term loan facility interest rate was calculated based on the contractual rate of LIBOR plus 1.100% as of December 31, 2019 and 2018.

Debt Covenants and Restrictions

The unsecured revolving credit facility, the unsecured term loan facility, the unsecured senior notes, the Series A and B Notes due 2026 and Series A and B Notes due 2027 and 2029 and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of December 31, 2019 and 2018.

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments as of December 31, 2019:

Year	(in thousands)
2020	$	5,137
2021	5,342
2022	400,554
2023	305,775
2024	431,006
Thereafter	2,431,688
Total aggregate principal value (1)	$	3,579,502

________________________ 

(1) Includes gross principal balance of outstanding debt before the effect of the following at December 31, 2019: $20.3 million of unamortized deferred financing costs for the unsecured term loan facility, unsecured senior notes and secured debt and $6.5 million of unamortized discounts for the unsecured senior notes.

Capitalized Interest and Loan Fees

The following table sets forth gross interest expense, including debt discount/premium and deferred financing cost amortization, net of capitalized interest, for the years ended 2019, 2018 and 2017. The interest expense capitalized was recorded as a cost of development and increased the carrying value of undeveloped land and construction in progress.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Gross interest expense	$	129,778		$	117,789		$	112,577
Capitalized interest and deferred financing costs	(81,241		)	(68,068		)	(46,537		)
Interest expense	$	48,537		$	49,721		$	66,040

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Fair Value Measurements and Disclosures - Assets and Liabilities Reported at Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair value adjustment of marketable securities and deferred compensation plan liability
Net gain (loss) on marketable securities	$ 3,885	$ (1,851)	$ 3,023
Fair value, measurements, recurring [Member] | Fair Value (Level 1) [Member]
Assets and Liabilities Reported at Fair Value
Marketable securities	$ 27,098	$ 21,779

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Quarterly Financial Information of the Operating Partnership (Unaudited) - Summarized Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effect of Fourth Quarter Events [Line Items]
Revenues	$ 220,235	$ 215,525	$ 200,492	$ 201,202	$ 190,842	$ 186,562	$ 187,072	$ 182,822	$ 837,454	$ 747,298	$ 719,001
Net income	77,922	48,298	47,215	41,794	166,890	38,310	31,755	40,971	215,229	277,926	180,615
Net income attributable to the Operating Partnership	72,500	43,846	42,194	36,903	160,220	34,400	27,549	36,246	195,443	258,415	164,612
Net income available to common stockholders	$ 72,500	$ 43,846	$ 42,194	$ 36,903	$ 160,220	$ 34,400	$ 27,549	$ 36,246	$ 195,443	$ 258,415	$ 151,249
Net income available to common stockholders per share/ unit—basic (dollars per share/ unit)	$ 0.68	$ 0.41	$ 0.41	$ 0.36	$ 1.59	$ 0.34	$ 0.27	$ 0.36	$ 1.87	$ 2.56	$ 1.52
Net income available to common stockholders per share/ unit—diluted (dollars per share/ unit)	$ 0.67	$ 0.41	$ 0.41	$ 0.36	$ 1.58	$ 0.33	$ 0.27	$ 0.36	$ 1.86	$ 2.55	$ 1.51
Kilroy Realty L.P. [Member]
Effect of Fourth Quarter Events [Line Items]
Revenues	$ 220,235	$ 215,525	$ 200,492	$ 201,202	$ 190,842	$ 186,562	$ 187,072	$ 182,822	$ 837,454	$ 747,298	$ 719,001
Net income	77,922	48,298	47,215	41,794	166,890	38,310	31,755	40,971	215,229	277,926	180,615
Net income attributable to the Operating Partnership	73,740	44,589	42,901	37,508	163,309	34,993	28,015	36,893	198,738	263,210	167,440
Net income available to common stockholders	$ 73,740	$ 44,589	$ 42,901	$ 37,508	$ 163,309	$ 34,993	$ 28,015	$ 36,893	$ 198,738	$ 263,210	$ 154,077
Net income available to common stockholders per share/ unit—basic (dollars per share/ unit)	$ 0.68	$ 0.41	$ 0.41	$ 0.36	$ 1.58	$ 0.34	$ 0.27	$ 0.36	$ 1.87	$ 2.56	$ 1.52
Net income available to common stockholders per share/ unit—diluted (dollars per share/ unit)	$ 0.67	$ 0.41	$ 0.41	$ 0.36	$ 1.57	$ 0.33	$ 0.27	$ 0.36	$ 1.86	$ 2.55	$ 1.51

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Organization and Ownership

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Ownership

Organization and Ownership

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in premier office and mixed-use submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Greater Los Angeles, San Diego County, the San Francisco Bay Area and Greater Seattle, which we believe have strategic advantages and strong barriers to entry. Class A real estate encompasses attractive and efficient buildings of high quality that are attractive to tenants, are well-designed and constructed with above-average material, workmanship and finishes and are well-maintained and managed. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We generally conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the terms “Kilroy Realty Corporation” or the “Company,” “we,” “our,” and “us” refer to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2019:

	Number of Buildings	Rentable Square Feet (unaudited)	Number of Tenants	Percentage  Occupied (unaudited)		Percentage Leased (unaudited)
Stabilized Office Properties	112	13,475,795	451	94.6	%	97.0	%

	Number of Buildings	Number of Units	2019 Average Occupancy (unaudited)
Stabilized Residential Property	1	200	82.4	%

Our stabilized portfolio includes all of our properties with the exception of development and redevelopment properties currently committed for construction, under construction, or in the tenant improvement phase, undeveloped land, recently completed residential properties not yet stabilized and real estate assets held for sale. We define redevelopment properties as those properties for which we expect to spend significant development and construction costs on the existing or acquired buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. We define properties in the tenant improvement phase as office and retail properties that we are developing or redeveloping where the project has reached cold shell condition and is ready for tenant improvements, which may require additional major base building construction before being placed in service. Projects in the tenant improvement phase are added to our stabilized portfolio once the project reaches the earlier of 95% occupancy or one year from the date of the cessation of major base building construction activities. Costs capitalized to construction in progress for development and redevelopment properties are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets at the historical cost of the property as the projects are placed in service.

During the year ended December 31, 2019, we added one completed development project to our stabilized office portfolio consisting of 394,340 square feet in San Francisco, California. As of December 31, 2019, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2019.

	Number of Properties/Projects	Estimated Rentable Square Feet (1) / Units (unaudited)
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

_______________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

Our stabilized portfolio also excludes our future development pipeline, which as of December 31, 2019 was comprised of five future development sites, representing approximately 61 gross acres of undeveloped land.

As of December 31, 2019, all of our properties and development projects were owned and all of our business was conducted in the state of California with the exception of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. All of our properties and development projects are 100% owned, excluding four office properties owned by three consolidated property partnerships and two development projects held by consolidated variable interest entities established to facilitate potential transactions intended to qualify as like-kind exchanges pursuant to Section 1031 of the Code (“Section 1031 Exchange”). Two of the three consolidated property partnerships, 100 First Street Member, LLC (“100 First LLC”) and 303 Second Street Member, LLC (“303 Second LLC”), each owned one office property in San Francisco, California through subsidiary REITs. As of December 31, 2019, the Company owned a 56% common equity interest in both 100 First LLC and 303 Second LLC. The third consolidated property partnership, Redwood City Partners, LLC (“Redwood LLC”) owned two office properties in Redwood City, California. As of December 31, 2019, the Company owned an approximate 93% common equity interest in Redwood LLC. The remaining interests in all three property partnerships were owned by unrelated third parties.

As of December 31, 2019, the Company owned an approximate 98.1% common general partnership interest in the Operating Partnership. The remaining approximate 1.9% common limited partnership interest in the Operating Partnership as of December 31, 2019 was owned by non-affiliated investors and certain of our executive officers and directors. Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. Generally, the number of common units held by the Company is equivalent to the number of outstanding shares of the Company’s common stock, and the rights of all the common units to quarterly distributions and payments in liquidation mirror those of the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Seventh Amended and Restated Agreement of Limited Partnership, as amended, the “Partnership Agreement”.

Kilroy Realty Finance, Inc., which is a wholly-owned subsidiary of the Company, is the sole general partner of the Finance Partnership and owns a 1.0% common general partnership interest in the Finance Partnership. The Operating Partnership owns the remaining 99.0% common limited partnership interest. With the exception of the Operating Partnership and our consolidated property partnerships, all of our subsidiaries are wholly-owned.

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CONSOLIDATED STATEMENTS OF OPERATIONS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES (Note 2):
Revenues	$ 837,454	$ 747,298	$ 719,001
EXPENSES:
Real estate taxes (Note 2)	78,097	70,820	66,449
Provision for bad debts (Notes 2 and 20)	0	5,685	3,269
Ground leases (Notes 2, 5 and 18)	8,113
Ground leases (Notes 2, 5 and 18)		6,176	6,337
General and administrative expenses (Note 15)	88,139	90,471	60,581
Leasing costs (Notes 2 and 5)	7,615
Depreciation and amortization (Notes 2 and 5)	273,130	254,281	245,886
Total expenses	615,131	561,220	512,493
OTHER (EXPENSES) INCOME:
Interest income and other net investment gain (loss) (Note 19)	4,641	(559)	5,503
Interest expense (Note 9)	(48,537)	(49,721)	(66,040)
Loss on early extinguishment of debt (Note 9)	0	(12,623)	(5,312)
Net gain on sales of land (Note 4)	0	11,825	449
Gains on sales of depreciable operating properties (Note 4)	36,802	142,926	39,507
Total other (expenses) income	(7,094)	91,848	(25,893)
NET INCOME	215,229	277,926	180,615
Net income attributable to noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	(19,786)	(19,511)	(16,003)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION / KILROY REALTY, L.P.	195,443	258,415	164,612
Preferred distributions (Note 14)	0	0	(5,774)
Original issuance costs of redeemed preferred units (Note 14)	0	0	(7,589)
Total preferred distributions	0	0	(13,363)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 195,443	$ 258,415	$ 151,249
Net income available to common unitholders per unit - basic (in dollars per unit)	$ 1.87	$ 2.56	$ 1.52
Net income available to common unitholders per unit - diluted (in dollars per unit)	$ 1.86	$ 2.55	$ 1.51
Weighted average common units outstanding - basic (in shares)	103,200,568	99,972,359	98,113,561
Weighted average common units outstanding - diluted (in shares)	103,849,168	100,482,365	98,727,331
Rental income [Member]
REVENUES (Note 2):
Revenues	$ 826,472	$ 656,631	$ 633,896
Tenant reimbursements [Member]
REVENUES (Note 2):
Revenues	0	80,982	76,559
Other property income [Member]
REVENUES (Note 2):
Revenues	10,982	9,685	8,546
Property [Member]
EXPENSES:
Property expenses (Note 2)	160,037	133,787	129,971
Kilroy Realty L.P. [Member]
REVENUES (Note 2):
Revenues	837,454	747,298	719,001
EXPENSES:
Real estate taxes (Note 2)	78,097	70,820	66,449
Provision for bad debts (Notes 2 and 20)	0	5,685	3,269
Ground leases (Notes 2, 5 and 18)	8,113
Ground leases (Notes 2, 5 and 18)		6,176	6,337
General and administrative expenses (Note 15)	88,139	90,471	60,581
Leasing costs (Notes 2 and 5)	7,615
Depreciation and amortization (Notes 2 and 5)	273,130	254,281	245,886
Total expenses	615,131	561,220	512,493
OTHER (EXPENSES) INCOME:
Interest income and other net investment gain (loss) (Note 19)	4,641	(559)	5,503
Interest expense (Note 9)	(48,537)	(49,721)	(66,040)
Loss on early extinguishment of debt (Note 9)	0	(12,623)	(5,312)
Net gain on sales of land (Note 4)	0	11,825	449
Gains on sales of depreciable operating properties (Note 4)	36,802	142,926	39,507
Total other (expenses) income	(7,094)	91,848	(25,893)
NET INCOME	215,229	277,926	180,615
Net income attributable to noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	(16,491)	(14,716)	(13,175)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION / KILROY REALTY, L.P.	198,738	263,210	167,440
Preferred distributions (Note 14)	0	0	(5,774)
Original issuance costs of redeemed preferred units (Note 14)	0	0
Total preferred distributions	0	0	(13,363)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 198,738	$ 263,210	$ 154,077
Net income available to common unitholders per unit - basic (in dollars per unit)	$ 1.87	$ 2.56	$ 1.52
Net income available to common unitholders per unit - diluted (in dollars per unit)	$ 1.86	$ 2.55	$ 1.51
Weighted average common units outstanding - basic (in shares)	105,223,975	102,025,276	100,246,567
Weighted average common units outstanding - diluted (in shares)	105,872,575	102,535,282	100,860,337
Kilroy Realty L.P. [Member] | Rental income [Member]
REVENUES (Note 2):
Revenues	$ 826,472	$ 656,631	$ 633,896
Kilroy Realty L.P. [Member] | Tenant reimbursements [Member]
REVENUES (Note 2):
Revenues	0	80,982	76,559
Kilroy Realty L.P. [Member] | Other property income [Member]
REVENUES (Note 2):
Revenues	10,982	9,685	8,546
Kilroy Realty L.P. [Member] | Property [Member]
EXPENSES:
Property expenses (Note 2)	$ 160,037	$ 133,787	$ 129,971

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Supplemental Cash Flow Information of the Operating Partnership - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Roll Forward]
Cash and cash equivalents	$ 60,044	$ 51,604	$ 57,649	$ 193,418
Restricted cash	16,300	119,430	9,149	56,711
Cash and cash equivalents and restricted cash	76,344	171,034	66,798	250,129
Kilroy Realty L.P. [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Roll Forward]
Cash and cash equivalents	60,044	51,604	57,649	193,418
Restricted cash	16,300	119,430	9,149	56,711
Cash and cash equivalents and restricted cash	$ 76,344	$ 171,034	$ 66,798	$ 250,129

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Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net:
Deferred leasing costs	$	286,026		$	266,905
Accumulated amortization	(100,145		)	(100,805		)
Deferred leasing costs, net	185,881			166,100
Above-market operating leases	611			2,836
Accumulated amortization	(116		)	(2,150		)
Above-market operating leases, net	495			686
In-place leases	58,076			66,526
Accumulated amortization	(31,647		)	(36,174		)
In-place leases, net	26,429			30,352
Below-market ground lease obligation	—			490
Accumulated amortization	—			(54		)
Below-market ground lease obligation, net (1)	—			436
Total deferred leasing costs and acquisition-related intangible assets, net	$	212,805		$	197,574
Acquisition-related Intangible Liabilities, net: (2)
Below-market operating leases	$	51,263		$	53,523
Accumulated amortization	(27,171		)	(29,978		)
Below-market operating leases, net	24,092			23,545
Above-market ground lease obligation	—			6,320
Accumulated amortization	—			(727		)
Above-market ground lease obligation, net (1)	—			5,593
Total acquisition-related intangible liabilities, net	$	24,092		$	29,138

_______________

(1) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Such amounts are reflected in the net book value of the right of use ground lease asset on our consolidated balance sheets. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(2) Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles for the years ended December 31, 2019, 2018 and 2017.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Deferred leasing costs (1)	$	35,779		$	34,341		$	31,675
Above-market operating leases (2)	192			444			2,240
In-place leases (1)	18,615			15,915			18,650
Below-market ground lease obligation (3)	—			8			8
Below-market operating leases (4)	(9,398		)	(10,192		)	(10,768		)
Above-market ground lease obligation (3)	—			(101		)	(101		)
Total	$	45,188		$	40,415		$	41,704

_______________

(1) The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense and the amortization of lease incentives is recorded as a reduction to rental income in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(4) The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of December 31, 2019 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Operating Leases (2)
	(in thousands)
2020	30,897		38		11,379		(7,258		)
2021	27,043		38		6,668		(4,543		)
2022	23,642		38		4,001		(3,553		)
2023	19,904		38		1,641		(1,866		)
2024	16,976		38		602		(1,090		)
Thereafter	67,419		305		2,138		(5,782		)
Total	$	185,881	$	495	$	26,429	$	(24,092	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2)

Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

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Schedule III - Real Estate and Accumulated Depreciation - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) ft² project property_units property_unit
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances | $	$ 259,502
Rentable square feet	13,475,795
Investment in real estate, federal Income tax basis | $	$ 7,900,000
Investment in real estate, held in VIE | $	$ 200,000
In-process development projects - under construction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet	2,291,000
Number of buildings | project	6
Office Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances | $	$ 259,502
Rentable square feet	13,475,795
Unamortized debt issuance expense | $	$ (900)
Office Building [Member] | 1550 N. El Centro Avenue, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciation life	35 years
Number of building units | property_units	200
Rentable square feet	0
Office Building [Member] | W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances | $	$ 170,000
Office Building [Member] | 320 Westlake Ave. North, WA and 321 Terry Avenue North, Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances | $	$ 89,500
Office Building [Member] | 3745 Paseo Place, Del Mar, CA (Retail) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciation life	35 years
Rentable square feet	0
Office Building [Member] | 3200 Paseo Village Way, San Diego, CA (Resi Phase I) (16) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciation life	35 years
Rentable square feet	0
Number of buildings | property_unit	237
Office Building [Member] | 1800 Owens St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciation life	35 years
Rentable square feet	0
Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciation life	35 years
Tenant Improvements [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property depreciable lives	1 year
Tenant Improvements [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Property depreciable lives	20 years
Retail site [Member] | 3745 Paseo Place, Del Mar, CA (Retail) [Member] | In-process development projects - under construction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet	96,000
Retail site [Member] | 1800 Owens St., San Francisco, CA [Member] | In-process development projects - under construction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet	750,000

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued (in shares)	106,016,287	100,746,988
Common stock, shares outstanding	106,016,287	100,746,988

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 215,229	$ 277,926	$ 180,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	268,045	249,882	241,862
Depreciation of non-real estate furniture, fixtures and equipment	5,085	4,400	4,024
(Recoveries of) provision for bad debts (Notes 2 and 20)	(3,433)	5,685	3,269
Non-cash amortization of share-based compensation awards (Note 15)	27,007	27,932	19,046
Non-cash amortization of deferred financing costs and net debt discounts	1,427	1,084	3,247
Non-cash amortization of net below market rents (Note 5)	(9,206)	(9,748)	(8,528)
Gains on sales of depreciable operating properties (Note 4)	(36,802)	(142,926)	(39,507)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 10)	(19,190)	(18,429)	(16,767)
Straight-line rents	(72,023)	(26,976)	(33,275)
Amortization of the right of use ground lease asset (Note 2)	683
Loss on early extinguishment of debt (Note 9)	0	12,623	5,312
(Gain) loss on sale of land (Note 4)	0	(11,825)	(449)
Net change in other operating assets	(14,476)	(7,930)	(17,732)
Net change in other operating liabilities	24,175	48,345	5,895
Net cash provided by operating activities	386,521	410,043	347,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(845,464)	(489,236)	(397,440)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	(173,291)	(311,299)	(19,829)
Expenditures for acquisitions of operating properties (Note 3)	(186,258)	(257,340)	0
Expenditures for operating properties and other capital assets	(147,687)	(166,440)	(88,425)
Net proceeds received from dispositions (Note 4)	124,421	364,300	182,492
Decrease (increase) in acquisition-related deposits	0	36,000
Decrease (increase) in acquisition-related deposits			(35,900)
Proceeds received from repayment of note receivable	0	15,100	0
Net cash used in investing activities	(1,228,279)	(808,915)	(359,102)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 13)	353,722	130,693	326,058
Redemption of Series G and H Preferred stock (Note 13)	0	0	(200,000)
Net proceeds from the issuance of unsecured debt (Note 9)	499,390	648,537	674,447
Repayments of unsecured debt (Note 9)	0	(261,823)	(519,024)
Borrowings on unsecured revolving credit facility	1,110,000	765,000	270,000
Repayments on unsecured revolving credit facility	(910,000)	(690,000)	(270,000)
Borrowings on unsecured debt (Note 9)	0	120,000	0
Principal payments and repayments of secured debt (Note 9)	(76,309)	(3,584)	(130,371)
Financing costs	(6,678)	(6,262)	(11,500)
Repurchase of common stock and restricted stock units (Note 15)	(14,556)	(16,553)	(12,986)
Proceeds from exercise of stock options	703	41	12,179
Contributions from noncontrolling interests in consolidated property partnerships (Note 11)	0	8,273	54,604
Distributions to noncontrolling interests in consolidated property partnerships	(12,952)	(11,803)	(16,542)
Dividends and distributions paid to common stockholders and common unitholders	(196,252)	(179,411)	(340,697)
Dividends and distributions paid to preferred stockholders and preferred unitholders	0	0	(7,409)
Net cash provided by (used in) financing activities	747,068	503,108	(171,241)
Net (decrease) increase in cash and cash equivalents and restricted cash	(94,690)	104,236	(183,331)
Cash and cash equivalents and restricted cash, beginning of year	171,034	66,798	250,129
Cash and cash equivalents and restricted cash, end of year	$ 76,344	$ 171,034	$ 66,798

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Share-Based and Other Compensation - Summary of Time-Based RSUs (Details) - Time-Based Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested (in shares)	182,219	214,131	228,095
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of RSUs outstanding, beginning balance (in shares)	586,779
Granted (in shares)	153,005	437,216	142,101
Vested (in shares)	153,464
Issuance of dividend equivalents (in shares)	13,341
Forfeited (in shares)	(55,813)
Number of RSUs outstanding, ending balance (in shares)	543,848	586,779
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
RSU weighted average fair value, beginning balance (in dollars per share)	$ 65.87
Fair value per share on valuation date (in dollars per share)	70.31	$ 64.21	$ 74.91
Weighted average grant date fair value, vested (in dollars per share)	67.26
Weighted average fair value, issuance of dividend equivalents (in dollars per share)	74.72
Weighted average fair value, forfeited (in dollars per share)	68.71
RSU weighted average fair value, ending balance (in dollars per share)	$ 66.66	$ 65.87
Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested RSUs, beginning balance (in shares)	1,089,088
Granted (in shares)	0
Vested (in shares)	153,464
Settled (in shares)	(198,183)
Issuance of dividend equivalents (in shares)	28,755
Forfeited (in shares)	0
Canceled (in shares)	(1,746)
Vested RSUs, ending balance (in shares)	1,071,378	1,089,088
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Total RSUs, beginning balance (in shares)	1,675,867
Granted (in shares)	153,005
Vested (in shares)	0
Settled (in shares)	(198,183)
Issuance of dividend equivalents (in shares)	42,096
Forfeited (in shares)	(55,813)
Canceled (in shares)	(1,746)
Total RSUs, ending balance (in shares)	1,615,226	1,675,867
Kilroy Realty 2006 Incentive Award Plan [Member] | Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Settled (in shares)	(82,646)

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Other Significant Events

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Other Significant Events

Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Current receivables	$	27,660		$	24,815
Allowance for uncollectible tenant receivables (1)	(1,171		)	(4,639		)
Current receivables, net	$	26,489		$	20,176

_______________

(1) Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for uncollectible tenant receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for uncollectible tenant receivables.

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred rent receivables	$	339,489		$	270,346
Allowance for deferred rent receivables (1)	(1,552		)	(3,339		)
Deferred rent receivables, net	$	337,937		$	267,007

_______________

(1)

Refer to Note 2 “Basis of Presentation and Significant Accounting Policies” for discussion of our accounting policies related to the allowance for deferred rent receivables and Note 20 “Other Significant Transactions” for additional information regarding changes in our allowance for deferred rent receivables.Other Significant Events

During the year ended December 31, 2019, we recorded a $2.9 million net increase in rental income on our consolidated statements of operations primarily due to a $4.2 million increase in revenue related to the improved credit quality of a tenant for which we previously recorded a bad debt reserve during the year ended December 31, 2018, partially offset by a $1.3 million decrease in revenue for other tenants with diminished credit quality during the year ended December 31, 2019.

During the year ended December 31, 2018, we recognized $5.7 million of provision for bad debts. The provision for bad debts was primarily due to a $7.0 million provision for one tenant recognized during the second quarter of 2018, partially offset by a $1.4 million decrease in the provision for bad debts for one lease due to the assignment of the lease to a credit tenant during the second quarter of 2018.

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Supplemental Cash Flow Information of the Operating Partnership

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information of the Operating Partnership

Supplemental Cash Flow Information of the Company

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of    December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common     unitholders (Notes 13 and 28)	$	53,219	$	47,559	$	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s    common stock	$	78	$	1,962	$	10,939

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

Supplemental Cash Flow Information of the Operating Partnership:

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$	53,219	$	47,559	$	43,448

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

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Share-Based and Other Compensation - Share-Based Compensation Cost Recorded During the Period and Other Compensation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 27, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 32.8	$ 35.9	$ 26.3
Share-based compensation costs	5.8	8.0	$ 7.3
Unrecognized compensation costs	$ 50.5
Cost not yet recognized, period for recognition	2 years 1 month 6 days
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash retirement benefit, scenario one				$ 13.2
Cash retirement benefit, scenario two				$ 16.2
Compensation expense	$ 1.5	$ 12.1

XML

Share-Based and Other Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Restricted Stock Units Valuation Assumptions

As of December 31, 2019, the estimated number of RSUs earned for the 2019 and 2018 Performance-Based RSUs and the actual number of RSUs earned for the 2017 Performance-Based RSUs was as follows:

	2019 Performance-Based RSUs	2018 Performance-Based RSUs	2017 Performance-Based RSUs
Service vesting period	February 1, 2019 - January, 2022	February 14, 2018 - January, 2021	February 24, 2017 - January, 2020
Target RSUs granted	143,396	158,205	130,956
Estimated RSUs earned (1)	229,095	262,242	142,581
Date of valuation	February 1, 2019	February 14, 2018	February 24, 2017

_______________

(1)

Estimated RSUs earned for the 2019 Performance-Based RSUs are based on the actual achievement of the 2019 FFO Performance Condition and for the 2019 Debt to EBITDA Ratio Performance Condition, assumes 125% of the target level of achievement for one participant and 117% of the target level of achievement for all other participants, and target level of achievement of the 2019 Market Condition. Estimated RSUs earned for the 2018 Performance-Based RSUs are based on the actual achievement of the 2018 FFO Performance Condition and assume target level achievement of the 2018 Market Condition and maximum level of achievement of the 2018 Debt to EBITDA Ratio Performance Condition. The 2017 Performance-Based RSUs earned are based on actual performance of the 2017 Performance Conditions and the 2017 Market Condition.

The total fair value of the Time-Based RSUs is based on the Company's closing share price on the NYSE on the respective fair valuation dates as detailed in the table below:

	2019 Time-Based RSU Grant		December 2018 Time-Based RSU Grant		2018 Time-Based RSU Grant (1)		2017 Time-Based RSU Grant (2)
Service vesting period	February 1, 2019 - January 5, 2022		December 27, 2018 - January 5, 2023		January & February 2018 - January 5, 2021		February 2017 - January 5, 2020
Fair value on valuation date (in millions)	$	10.1	$	18.5	$	8.4	$	7.5
Fair value per share	$	69.89	$	62.00	$	70.37	$	73.30
Date of fair valuation	February 1, 2019		December 27, 2018		January & February 2018		February 2017

_______________

(1) The 2018 Time-Based RSUs consist of 56,015 RSUs granted on January 29, 2018 at a fair value per share of $70.37 and 67,818 RSUs granted on February 14, 2018 at a fair value per share of $66.46.

(2) The 2017 Time-Based RSUs consist of 41,119 RSUs granted on February 3, 2017 at a fair value per share of $73.30 and 57,901 RSUs granted on February 24, 2017 at a fair value per share of $77.16.

Summary of Nonvested Restricted Stock

A summary of our nonvested and vested restricted stock activity for years ended December 31, 2018 and 2017 is presented below:

	Shares Granted		Shares Vested
Years ended December 31,	Nonvested Shares Issued	Weighted-Average Grant Date Fair Value Per Share	Vested Shares		Total Fair Value at Vest Date (1) (in thousands)
2018	—	—	(22,884	)	1,652
2017	—	—	(24,261	)	1,781

_______________

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.

Summary of Nonvested and Vested Restricted Stock Activity

A summary of our nonvested and vested restricted stock activity for years ended December 31, 2018 and 2017 is presented below:

	Shares Granted		Shares Vested
Years ended December 31,	Nonvested Shares Issued	Weighted-Average Grant Date Fair Value Per Share	Vested Shares		Total Fair Value at Vest Date (1) (in thousands)
2018	—	—	(22,884	)	1,652
2017	—	—	(24,261	)	1,781

_______________

(1)

Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.

December 2018 Market-Based RSUs [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Assumptions Utilized in the Monte Carlo Simulation Pricing Models

The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	December 2018 Market-Based RSU Award Fair Value Assumptions
Valuation date	December 27, 2018
Fair value per share on valuation date	$68.66
Expected share price volatility	23.0%
Risk-free interest rate	2.4%

Market measure-based Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Restricted Stock Units Award Activity

A summary of our performance and market-measure based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted-Average Fair Value Per Share
Outstanding at January 1, 2019	1,018,337		$	67.29	35,761		1,054,098
Granted	231,191		71.12		1,155		232,346
Vested	(261,990	)	57.08		261,990		—
Settled (1)	—				(264,814	)	(264,814	)
Issuance of dividend equivalents (2)	23,254		74.11		2,592		25,846
Forfeited	(78,117	)	70.07		(5	)	(78,122	)
Outstanding as of December 31, 2019 (3)	932,675		$	71.04	36,679		969,354

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 125,220 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3) Outstanding RSUs as of December 31, 2019 represent the actual achievement of the FFO performance conditions and assumes target levels for the market and other performance conditions. The number of restricted stock units ultimately earned is subject to change based upon actual performance over the three-year vesting period. Dividend equivalents earned will vest along with the underlying award and are also subject to changes based on the number of RSUs ultimately earned for each underlying award.

A summary of our performance and market-measure based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Years ended December 31,	Non-Vested RSUs Granted (1)	Weighted-Average Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (in thousands)
2019	231,191	$	71.12	(265,737	)	$	18,703
2018	601,012	68.51		(265,918	)	18,906
2017	170,994	78.97		(194,991	)	14,270

_______________

(1) Non-vested RSUs granted are based on the actual achievement of the FFO performance conditions and assumes target level achievement for the market and other performance conditions.

Time-Based Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Restricted Stock Units Award Activity

A summary of our time-based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted Average Fair Value Per Share
Outstanding at January 1, 2019	586,779		$	65.87	1,089,088		1,675,867
Granted	153,005		70.31		—		153,005
Vested	(153,464	)	67.26		153,464		—
Settled (1)					(198,183	)	(198,183	)
Issuance of dividend equivalents (2)	13,341		74.72		28,755		42,096
Forfeited	(55,813	)	68.71		—		(55,813	)
Canceled (3)					(1,746	)	(1,746	)
Outstanding as of December 31, 2019	543,848		$	66.66	1,071,378		1,615,226

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 82,646 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3)

For shares vested but not yet settled, we accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy minimum statutory tax-withholding requirements related to either the settlement or vesting of RSUs in accordance with the terms of the 2006 Plan.

A summary of our time-based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Year ended December 31,	Non-Vested RSUs Issued	Weighted-Average Grant Date Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (1) (in thousands)
2019	153,005	$	70.31	(182,219	)	$	12,277
2018	437,216	64.21		(214,131	)	14,768
2017	142,101	74.91		(228,095	)	16,735

_______________

(1)

Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting. Excludes the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

2018, 2017, and 2016 Performance-Based RSUs [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Assumptions Utilized in the Monte Carlo Simulation Pricing Models

The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	2019 Award Fair Value Assumptions	2018 Award Fair Value Assumptions	2017 Award Fair Value Assumptions
Valuation date	February 1, 2019	February 14, 2018	February 24, 2017
Fair value per share on valuation date	$72.57	$70.08	$80.89
Expected share price volatility	19.0%	20.0%	21.0%
Risk-free interest rate	2.48%	2.37%	1.39%

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Secured and Unsecured Debt of the Operating Partnership (Tables) - Kilroy Realty L.P. [Member]

12 Months Ended

Dec. 31, 2019

Debt Instrument [Line Items]

Unsecured revolving credit facility

The following table summarizes the balance and terms of our unsecured revolving credit facility as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	245,000		$	45,000
Remaining borrowing capacity	505,000			705,000
Total borrowing capacity (1)	$	750,000		$	750,000
Interest rate (2)	2.76		%	3.48		%
Facility fee-annual rate (3)	0.200%
Maturity date	July 2022

_______________

(1) We may elect to borrow, subject to bank approval and obtaining commitments for any additional borrowing capacity, up to an additional $600.0 million under an accordion feature under the terms of the unsecured revolving credit facility and unsecured term loan facility.

(2) Our unsecured revolving credit facility interest rate was calculated based on the contractual rate of LIBOR plus 1.000% as of December 31, 2019 and 2018.

(3)

Our facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we incurred debt origination and legal costs. As of December 31, 2019 and 2018, $3.4 million and $4.7 million of unamortized deferred financing costs, respectively, which are included in prepaid expenses and other assets, net on our consolidated balance sheets, remained to be amortized through the maturity date of our unsecured revolving credit facility. The following table summarizes the balance and terms of our unsecured term loan facility as of December 31, 2019 and 2018, which is included in unsecured debt, net on our consolidated balance sheets:

	December 31, 2019			December 31, 2018
	(in thousands)
Outstanding borrowings	$	150,000		$	150,000
Remaining borrowing capacity	—			—
Total borrowing capacity (1)	$	150,000		$	150,000
Interest rate (2)	2.85		%	3.49		%
Undrawn facility fee-annual rate	0.200%
Maturity date	July 2022

_______________

(1) As of December 31, 2019 and 2018, $0.7 million and $0.9 million of unamortized deferred financing costs, respectively, remained to be amortized through the maturity date of our unsecured term loan facility.

(2)

Our unsecured term loan facility interest rate was calculated based on the contractual rate of LIBOR plus 1.100% as of December 31, 2019 and 2018.

Schedule of debt maturities

The following table summarizes the stated debt maturities and scheduled amortization payments as of December 31, 2019:

Year	(in thousands)
2020	$	5,137
2021	5,342
2022	400,554
2023	305,775
2024	431,006
Thereafter	2,431,688
Total aggregate principal value (1)	$	3,579,502

________________________ 

(1) Includes gross principal balance of outstanding debt before the effect of the following at December 31, 2019: $20.3 million of unamortized deferred financing costs for the unsecured term loan facility, unsecured senior notes and secured debt and $6.5 million of unamortized discounts for the unsecured senior notes.

Capitalized interest and loan fees

The following table sets forth gross interest expense, including debt discount/premium and deferred financing cost amortization, net of capitalized interest, for the years ended 2019, 2018 and 2017. The interest expense capitalized was recorded as a cost of development and increased the carrying value of undeveloped land and construction in progress.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Gross interest expense	$	129,778		$	117,789		$	112,577
Capitalized interest and deferred financing costs	(81,241		)	(68,068		)	(46,537		)
Interest expense	$	48,537		$	49,721		$	66,040

Secured debt [Member]

Debt Instrument [Line Items]

Debt balance and significant terms

The following table sets forth the composition of our secured debt as of December 31, 2019 and 2018:

	Annual Stated Interest Rate (1)	GAAP Effective Rate (1)(2)	Maturity Date	December 31,
Type of Debt				2019			2018
				(in thousands)
Mortgage note payable	3.57%	3.57%	December 2026	$	170,000		$	170,000
Mortgage note payable (3)	4.48%	4.48%	July 2027	89,502			91,332
Mortgage note payable (3)(4)	6.05%	3.50%	June 2019	—			75,238
Total secured debt				$	259,502		$	336,570
Unamortized Deferred Financing Costs				(909		)	(1,039		)
Total secured debt, net				$	258,593		$	335,531

______________

(1) All interest rates presented are fixed-rate interest rates.

(2) Represents the effective interest rate including the amortization of initial issuance discounts/premiums excluding the amortization of deferred financing costs.

(3) The secured debt and the related properties that secure the debt are held in a special purpose entity and the properties are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

(4) In February 2019, the Company repaid this mortgage note payable at par.

Unsecured senior notes [Member]

Debt Instrument [Line Items]

Debt balance and significant terms

The following table summarizes the balance and significant terms of the registered unsecured senior notes issued by the Operating Partnership and outstanding, including unamortized discounts of $6.5 million and $6.6 million and unamortized deferred financing costs of $18.7 million and $15.4 million as of December 31, 2019 and 2018, respectively:

					Net Carrying Amount as of December 31,
	Issuance date	Maturity date	Stated coupon rate	Effective interest rate (1)	2019			2018
					(in thousands)
3.050% Unsecured Senior Notes (2)	September 2019	February 2030	3.050%	3.064%	$	500,000		$	—
Unamortized discount and deferred financing costs					(5,998		)	—
Net carrying amount					$	494,002		$	—
4.750% Unsecured Senior Notes (3)	November 2018	December 2028	4.750%	4.800%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(4,446		)	(4,960		)
Net carrying amount					$	395,554		$	395,040
4.350% Unsecured Senior Notes (4)	October 2018	October 2026	4.350%	4.350%	$	200,000		$	200,000
Unamortized discount and deferred financing costs					(1,186		)	(1,375		)
Net carrying amount					$	198,814		$	198,625
4.300% Unsecured Senior Notes (4)	July 2018	July 2026	4.300%	4.300%	$	50,000		$	50,000
Unamortized discount and deferred financing costs					(290		)	(342		)
Net carrying amount					$	49,710		$	49,658
3.450% Unsecured Senior Notes (5)	December 2017	December 2024	3.450%	3.470%	$	425,000		$	425,000
Unamortized discount and deferred financing costs					(2,907		)	(3,493		)
Net carrying amount					$	422,093		$	421,507
3.450% Unsecured Senior Notes (6)	February 2017	February 2029	3.450%	3.450%	$	75,000		$	75,000
Unamortized discount and deferred financing costs					(390		)	(432		)
Net carrying amount					$	74,610		$	74,568
3.350% Unsecured Senior Notes (6)	February 2017	February 2027	3.350%	3.350%	$	175,000		$	175,000
Unamortized discount and deferred financing costs					(825		)	(941		)
Net carrying amount					$	174,175		$	174,059
4.375% Unsecured Senior Notes (7)	September 2015	October 2025	4.375%	4.444%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(3,185		)	(3,738		)
Net carrying amount					$	396,815		$	396,262
4.250% Unsecured Senior Notes (8)	July 2014	August 2029	4.250%	4.350%	$	400,000		$	400,000
Unamortized discount and deferred financing costs					(5,100		)	(5,632		)
Net carrying amount					$	394,900		$	394,368
3.800% Unsecured Senior Notes (9)	January 2013	January 2023	3.800%	3.800%	$	300,000		$	300,000
Unamortized discount and deferred financing costs					(834		)	(1,108		)
Net carrying amount					$	299,166		$	298,892
Total Unsecured Senior Notes, Net					$	2,899,839		$	2,402,979

________________________

(1) Represents the effective interest rate including the amortization of initial issuance discounts, excluding the amortization of deferred financing costs.

(2) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year, beginning on February 15, 2020.

(3) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(4) Interest on these notes is payable semi-annually in arrears on April 18th and October 18th of each year.

(5) Interest on these notes is payable semi-annually in arrears on June 15th and December 15th of each year.

(6) Interest on these notes is payable semi-annually in arrears on February 17th and August 17th of each year.

(7) Interest on these notes is payable semi-annually in arrears on April 1st and October 1st of each year.

(8) Interest on these notes is payable semi-annually in arrears on February 15th and August 15th of each year.

(9) Interest on these notes is payable semi-annually in arrears on January 15th and July 15th of each year.

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Receivables - Current Receivables and Deferred Rent Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current Receivables, net
Current receivables	$ 27,660	$ 24,815
Allowance for uncollectible tenant receivables	(1,171)	(4,639)
Current receivables, net	26,489	20,176
Deferred Rent Receivables, net
Deferred rent receivables	339,489	270,346
Allowance for deferred rent receivables	(1,552)	(3,339)
Deferred rent receivables, net	$ 337,937	$ 267,007

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Deferred Revenue and Acquisition-Related Intangible Liabilities, net - Estimated Amortization of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Revenue, Future Amortization Recognized By Year [Abstract]
Total	$ 96,271	$ 104,558
Tenant funded tenant improvements [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues amortized and recognized as rental income	19,200	$ 18,400	$ 16,800
Deferred Revenue, Future Amortization Recognized By Year [Abstract]
2020	16,935
2021	15,426
2022	14,320
2023	12,553
2024	10,318
Thereafter	26,719
Total	$ 96,271

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Acquisitions - Operating Property Acquisitions (Details) $ in Millions				12 Months Ended
	Oct. 15, 2019 USD ($) ft² building	Dec. 21, 2018 USD ($) ft² building	Jan. 31, 2018 USD ($) ft² building	Dec. 31, 2019 USD ($) ft² building	Dec. 31, 2018 USD ($) ft² building
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Rentable Square Feet (unaudited) | ft²				13,475,795
Purchase price				$ 173.0	$ 308.2
Revenue contributed from acquired properties				3.7	8.0
Net income (loss) contributed from acquired properties				$ (0.1)	$ 1.7
3101-3243 La Cienega Boulevard, Culver City, CA [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of buildings | building	19			19
Rentable Square Feet (unaudited) | ft²	151,908
Occupancy percent				100.00%
Purchase price	$ 186.0
345, 347 & 349 Oyster Point Boulevard, South San Francisco, CA [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of buildings | building			3
Rentable Square Feet (unaudited) | ft²			145,530
Occupancy percent				100.00%
Purchase price			$ 111.0
345 Brannan Street, San Francisco, CA [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of buildings | building		1
Rentable Square Feet (unaudited) | ft²		110,050
Occupancy percent				99.70%
Purchase price		$ 146.0
345, 347 & 349 Oyster Point Boulevard, South San Francisco, CA and 345 Brannan Street, San Francisco, CA [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of buildings | building					4
Rentable Square Feet (unaudited) | ft²					255,580
Purchase price					$ 257.0

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Secured and Unsecured Debt of the Company - Narrative (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Secured debt	$ 258,593,000	$ 335,531,000
Line of credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	150,000,000.0
Unsecured debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3,300,000,000	$ 2,600,000,000

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Secured and Unsecured Debt of the Operating Partnership - Unsecured Revolving Credit Facility and Term Loan Facility (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Terms of the Credit Facility
Outstanding borrowings		$ 245,000,000	$ 45,000,000
Borrowings on unsecured debt		0	120,000,000	$ 0
Line of credit [Member]
Terms of the Credit Facility
Total borrowing capacity		150,000,000.0
Kilroy Realty L.P. [Member]
Terms of the Credit Facility
Outstanding borrowings		245,000,000	45,000,000
Unamortized debt issuance expense		20,300,000
Borrowings on unsecured debt		0	120,000,000	$ 0
Kilroy Realty L.P. [Member] | Revolving credit facility [Member]
Terms of the Credit Facility
Outstanding borrowings		245,000,000	45,000,000
Remaining borrowing capacity		505,000,000	705,000,000
Total borrowing capacity		$ 750,000,000	$ 750,000,000
Interest rate		2.76%	3.48%
Facility fee-annual rate		0.20%	0.20%
Contingent additional borrowings		$ 600,000,000.0
Unamortized debt issuance expense		3,400,000	$ 4,700,000
Kilroy Realty L.P. [Member] | Line of credit [Member]
Terms of the Credit Facility
Total borrowing capacity		150,000,000	150,000,000
Kilroy Realty L.P. [Member] | $150.0 million term loan facility [Member] | Line of credit [Member]
Terms of the Credit Facility
Outstanding borrowings	$ 150,000,000.0	150,000,000	150,000,000
Remaining borrowing capacity		$ 0	$ 0
Interest rate		2.85%	3.49%
Undrawn facility fee-annual rate		0.20%	0.20%
Unamortized debt issuance expense		$ 700,000	$ 900,000
Line of credit facility, increase (decrease)	(30,000,000.0)
Borrowings on unsecured debt	$ 120,000,000.0
Kilroy Realty L.P. [Member] | London Interbank Offered Rate (LIBOR) [Member] | Revolving credit facility [Member]
Terms of the Credit Facility
Basis spread on LIBOR		1.00%	1.00%
Kilroy Realty L.P. [Member] | London Interbank Offered Rate (LIBOR) [Member] | $150.0 million term loan facility [Member] | Line of credit [Member]
Terms of the Credit Facility
Basis spread on LIBOR		1.10%	1.10%

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Dispositions - Land Dispositions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain (loss) on sales of land	$ 0	$ 11,825	$ 449
Disposal group, disposed of by sale [Member] | Plaza Yarrow Bay Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain (loss) on sales of land		$ 11,800
Disposal group, disposed of by sale [Member] | Sorrento Mesa and Mission Valley Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net gain (loss) on sales of land			$ 400

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Quarterly Financial Information of the Operating Partnership (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of summarized quarterly financial data

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows: 

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to Kilroy Realty Corporation	36,903		42,194		43,846		72,500
Net income available to common stockholders	36,903		42,194		43,846		72,500
Net income available to common stockholders per share – basic	0.36		0.41		0.41		0.68
Net income available to common stockholders per share – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to Kilroy Realty Corporation	36,246		27,549		34,400		160,220
Net income available to common stockholders	36,246		27,549		34,400		160,220
Net income available to common stockholders per share – basic	0.36		0.27		0.34		1.59
Net income available to common stockholders per share – diluted	0.36		0.27		0.33		1.58

____________________

(1) The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering activity during the year.

Kilroy Realty L.P. [Member]

Schedule of summarized quarterly financial data

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows:

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to the Operating Partnership	37,508		42,901		44,589		73,740
Net income available to common unitholders	37,508		42,901		44,589		73,740
Net income available to common unitholders per unit – basic	0.36		0.41		0.41		0.68
Net income available to common unitholders per unit – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to the Operating Partnership	36,893		28,015		34,993		163,309
Net income available to common unitholders	36,893		28,015		34,993		163,309
Net income available to common unitholders per unit – basic	0.36		0.27		0.34		1.58
Net income available to common unitholders per unit – diluted	0.36		0.27		0.33		1.57

___________________

(1)

The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering programs that occurred during the year

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Share-Based and Other Compensation - Stockholder Approved Share-Based Incentive Compensation Plan (Details) shares in Millions	Dec. 31, 2019 shares
Kilroy Realty 2006 Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant	0.4
Shareholder Meeting Date May 21, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares requested	9.2

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Stockholders' Equity of the Company - Narrative (Details) - USD ($)			1 Months Ended		12 Months Ended
	Aug. 15, 2017	Mar. 30, 2017	Jul. 31, 2019	Aug. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Class of Stock [Line Items]
Common stock, value, issued					$ 1,060,000	$ 1,007,000
Aggregate net proceeds after selling commissions					$ 353,722,000	$ 130,693,000	$ 326,058,000
Sale of stock, shares issued (in shares)					106,016,287	100,746,988
Stock repurchase program, number of shares authorized to be repurchased					4,935,826
Original issuance costs					$ 0	$ 0	7,589,000
2014 At-The-Market Program [Member]
Class of Stock [Line Items]
Aggregate gross proceeds						$ 300,000,000.0
2018 At-The-Market Program [Member]
Class of Stock [Line Items]
Aggregate gross proceeds								$ 500,000,000.0
Series H Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock (in shares)	4,000,000	4,000,000
Preferred stock, dividend rate	6.375%
Preferred stock, liquidation preference per share (in dollars per share)	$ 25.00
Preferred stock liquidation preference	$ 100,000,000.0
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock (in shares)		4,000,000
Preferred stock, dividend rate		6.875%
Preferred stock, liquidation preference per share (in dollars per share)		$ 25.00
Preferred stock liquidation preference		$ 100,000,000.0
Series G And H Preferred Stock [Member]
Class of Stock [Line Items]
Original issuance costs							$ 7,600,000
Forward Equity Offering [Member]
Class of Stock [Line Items]
Common stock, value, issued				$ 360,500,000
Stock issued, price per share (in dollar per share)				$ 72.10
Aggregate net proceeds after selling commissions			$ 354,300,000
Forward Equity Offering [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock issued (in shares)			5,000,000	5,000,000
Aggregate net proceeds after selling commissions			$ 354,300,000
Sale of stock, shares issued (in shares)			5,000,000
Forward Equity Offering [Member] | Common Stock [Member] | 2014 At-The-Market Program [Member]
Class of Stock [Line Items]
Sale of stock, shares available for sale (in shares)						1,369,729
Forward Equity Offering [Member] | Common Stock [Member] | 2018 At-The-Market Program [Member]
Class of Stock [Line Items]
Stock issued, price per share (in dollar per share)					$ 80.08
Sale of stock, shares available for sale (in shares)					3,147,110
Sale of stock, shares issued (in shares)					447,466	447,466
Sale of stock, available for sale under program					$ 214,200,000

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Supplemental Cash Flow Information of the Company (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flows

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of    December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common     unitholders (Notes 13 and 28)	$	53,219	$	47,559	$	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s    common stock	$	78	$	1,962	$	10,939

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$	53,219	$	47,559	$	43,448

Reconciliation of cash and cash equivalents and restricted cash

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

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Subsequent Events

12 Months Ended

Dec. 31, 2019

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On January 15, 2020, $53.2 million of dividends were paid out to common stockholders, common unitholders and RSU holders of record on December 31, 2019.

On January 31, 2020, the Executive Compensation Committee granted 109,359 Time-Based RSUs and 154,267 Performance-Based RSUs to key employees under the 2006 Plan. The compensation cost related to the RSUs is expected to be recognized over a period of three years.

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Organization and Ownership (Tables)

12 Months Ended

Dec. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of real estate properties

As of December 31, 2019, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2019.

	Number of Properties/Projects	Estimated Rentable Square Feet (1) / Units (unaudited)
In-process development projects - tenant improvement (2)	2	846,000
In-process development projects - under construction (3)	6	2,291,000
Completed residential development project (4)	1	237 units

_______________

(1) Estimated rentable square feet upon completion.

(2) Includes 96,000 square feet of retail space.

(3) In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 564 residential units.

(4) Represents recently completed residential units not yet stabilized.

Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2019:

	Number of Buildings	Rentable Square Feet (unaudited)	Number of Tenants	Percentage  Occupied (unaudited)		Percentage Leased (unaudited)
Stabilized Office Properties	112	13,475,795	451	94.6	%	97.0	%

	Number of Buildings	Number of Units	2019 Average Occupancy (unaudited)
Stabilized Residential Property	1	200	82.4	%

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Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of identified deferred leasing costs and acquisition-related intangible assets

The following table summarizes our deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market operating leases, in-place leases and below-market ground lease obligation) and intangible liabilities (acquired value of below-market operating leases and above-market ground lease obligation) as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net:
Deferred leasing costs	$	286,026		$	266,905
Accumulated amortization	(100,145		)	(100,805		)
Deferred leasing costs, net	185,881			166,100
Above-market operating leases	611			2,836
Accumulated amortization	(116		)	(2,150		)
Above-market operating leases, net	495			686
In-place leases	58,076			66,526
Accumulated amortization	(31,647		)	(36,174		)
In-place leases, net	26,429			30,352
Below-market ground lease obligation	—			490
Accumulated amortization	—			(54		)
Below-market ground lease obligation, net (1)	—			436
Total deferred leasing costs and acquisition-related intangible assets, net	$	212,805		$	197,574
Acquisition-related Intangible Liabilities, net: (2)
Below-market operating leases	$	51,263		$	53,523
Accumulated amortization	(27,171		)	(29,978		)
Below-market operating leases, net	24,092			23,545
Above-market ground lease obligation	—			6,320
Accumulated amortization	—			(727		)
Above-market ground lease obligation, net (1)	—			5,593
Total acquisition-related intangible liabilities, net	$	24,092		$	29,138

_______________

(1) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Such amounts are reflected in the net book value of the right of use ground lease asset on our consolidated balance sheets. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(2)

Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

Amortization for the period related to deferred leasing costs and acquisition-related intangibles

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles for the years ended December 31, 2019, 2018 and 2017.

	Year Ended December 31,
	2019			2018			2017
	(in thousands)
Deferred leasing costs (1)	$	35,779		$	34,341		$	31,675
Above-market operating leases (2)	192			444			2,240
In-place leases (1)	18,615			15,915			18,650
Below-market ground lease obligation (3)	—			8			8
Below-market operating leases (4)	(9,398		)	(10,192		)	(10,768		)
Above-market ground lease obligation (3)	—			(101		)	(101		)
Total	$	45,188		$	40,415		$	41,704

_______________

(1) The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense and the amortization of lease incentives is recorded as a reduction to rental income in the consolidated statements of operations for the periods presented.

(2) The amortization of above-market operating leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.

(3) Upon adoption of Topic 842 on January 1, 2019 (refer to Note 2 “Basis of Presentation and Significant Accounting Policies”), we no longer separately recognize above or below-market ground lease obligations. Refer to Note 18 “Commitments and Contingencies” for further discussion of our ground lease obligations.

(4)

The amortization of below-market operating leases is recorded as an increase to rental income in the consolidated statements of operations for the periods presented.

Estimated annual amortization related to deferred leasing costs and acquisition-related intangibles

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of December 31, 2019 for future periods:

Year	Deferred Leasing Costs		Above-Market Operating Leases (1)		In-Place Leases		Below-Market Operating Leases (2)
	(in thousands)
2020	30,897		38		11,379		(7,258		)
2021	27,043		38		6,668		(4,543		)
2022	23,642		38		4,001		(3,553		)
2023	19,904		38		1,641		(1,866		)
2024	16,976		38		602		(1,090		)
Thereafter	67,419		305		2,138		(5,782		)
Total	$	185,881	$	495	$	26,429	$	(24,092	)

_______________

(1) Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.

(2) Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.

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Share-Based and Other Compensation

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Share-Based and Other Compensation

Share-Based and Other Compensation

Stockholder Approved Share-Based Incentive Compensation Plan

As of December 31, 2019, we maintained one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan, as amended (the “2006 Plan”). The Company has a currently effective registration statement registering 9.2 million shares of our common stock for possible issuance under our 2006 Incentive Award Plan. As of December 31, 2019, approximately 0.4 million shares were available for grant under the 2006 Plan. The calculation of shares available for grant is presented after taking into account a reserve for a sufficient number of shares to cover the vesting and payment of 2006 Plan awards that were outstanding on that date, including performance-based vesting awards at (i) levels actually achieved for the performance conditions (as defined below) for which the performance period has been completed and (ii) at maximum levels for the other performance and market conditions (as defined below) for awards still in a performance period.

The Executive Compensation Committee (the “Compensation Committee”) of the Company’s Board of Directors may grant the following share-based awards to eligible individuals, as provided under the 2006 Plan: incentive stock options, nonqualified stock options, restricted stock (nonvested shares), stock appreciation rights, performance shares, performance stock units, dividend equivalents, stock payments, deferred stock, restricted stock units (“RSUs”), profit interest units, performance bonus awards, performance-based awards and other incentive awards. For each award granted under our share-based incentive compensation programs, the Operating Partnership simultaneously issues to the Company a number of common units equal to the number of shares of common stock ultimately paid by the Company in respect of such awards.

2019, 2018 and 2017 Share-Based Compensation Grants

In February 2019, the Executive Compensation Committee of the Company’s Board of Directors awarded 288,378 restricted stock units (“RSUs”) to certain officers of the Company under the 2006 Plan, which included 143,396 RSUs (at the target level of performance) that are subject to market and/or performance-based vesting requirements (the “2019 Performance-Based RSUs”) and 144,982 RSUs that are subject to time-based vesting requirements (the “2019 Time-Based RSUs”). During the year ended December 31, 2019, 10,733 2019 Time-Based RSUs, 24,353 2019 Performance-Based RSUs and 98,844 time vest and performance RSUs that were granted in prior years were forfeited.

In connection with entering into an amended employment agreement (the “Amended Employment Agreement”), on December 27, 2018, the Compensation Committee of the Company’s Board of Directors awarded John Kilroy, the Chairman of the Board of Directors, President and Chief Executive Officer of the Company and the Operating Partnership 483,871 RSUs, providing an additional retention incentive during the term of the agreement and enticing Mr. Kilroy to delay his retirement. Of these RSUs awarded, 266,130 RSUs (at the target level of performance) are subject to market-based vesting requirements and 217,741 RSUs are subject to time-based vesting requirements. In addition to Mr. Kilroy’s award, the Compensation Committee of the Company’s Board of Directors awarded 161,290 RSUs to certain members of management. Of these RSUs awarded, 80,647 RSUs (at the target level of performance) are subject to market-based vesting requirements (together totaling 346,777 target RSUs with Mr. Kilroy’s award, the “December 2018 Market-Based RSUs”) and 80,643 RSUs are subject to time-based vesting requirements (together totaling 298,384 RSUs with Mr. Kilroy’s award, the “December 2018 Time-Based RSUs”).

In January and February 2018, the Executive Compensation Committee of the Company’s Board of Directors awarded 282,038 RSUs to certain officers of the Company under the 2006 Plan, which included 158,205 RSUs (at the target level of performance) that are subject to market and/or performance-based vesting requirements (the “2018 Performance-Based RSUs”) and 123,833 RSUs that are subject to time-based vesting requirements (the “2018 Time-Based RSUs”). Additionally, during 2018, 14,999 RSUs were granted to the board of directors and certain members of management subject to time vesting requirements.

In February 2017, the Executive Compensation Committee of the Company’s Board of Directors awarded 229,976 RSUs to certain officers of the Company under the 2006 Plan, which included 130,956 RSUs (at the target level of performance) that are subject to time-based, market-measure based and performance-based vesting requirements (the

“2017 Performance-Based RSUs”) and 99,020 RSUs that are subject to time-based vesting requirements (the “2017 Time-Based RSUs”). Additionally, during 2017, 43,081 RSUs were granted to the board of directors and certain members of management subject to time vesting requirements.

December 2018 Market-Based RSU Grant

Between 0% and 200% of the total 346,777 target number of December 2018 Market-Based RSUs will be eligible to vest based on the Company’s relative total shareholder return (“TSR”) versus a comparative group of companies that consist of companies in the SNL US REIT Office Index over the performance period. An initial number of RSUs (the “Initial Number of RSUs”) will be determined at the end of 2021 based on a three year performance period (2019 through 2021). Once the Initial Number of RSUs is determined, 75% of the Initial Number of RSUs will be scheduled to vest on January 5, 2022. The remaining 25% of the Initial Number of RSUs will be scheduled to vest on January 5, 2023, subject to adjustment based on the Company’s relative TSR for the entire four-year performance period (2019 through 2022). The December 2018 Market-Based RSUs are also subject to service vesting requirements through the scheduled vest dates.

Each December 2018 Market-Based RSU represents the right to receive one share of our common stock in the future, subject to, and as modified by, the Company’s level of achievement of the applicable market conditions. The December 27, 2018 grant date fair value of the December 2018 Market-Based RSUs was $23.8 million. The fair value was calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. For the year ended December 31, 2018, we recorded compensation expense based upon the $68.66 grant date fair value per share. Compensation expense for the December 2018 Market-Based RSUs is recognized using a graded vesting approach, where 75% of the fair value will be recognized on a straight-line basis over the three-year initial performance period through the end of 2021, and the remaining 25% of the fair value will be recognized on a straight-line basis over the four-year final performance period through the end of 2022. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	December 2018 Market-Based RSU Award Fair Value Assumptions
Valuation date	December 27, 2018
Fair value per share on valuation date	$68.66
Expected share price volatility	23.0%
Risk-free interest rate	2.4%

The computation of expected volatility was based on a blend of the historical volatility of our shares of common stock over a period of twice the performance period and implied volatility data based on the observed pricing of six month publicly-traded options on shares of our common stock. The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at December 27, 2018.

2019, 2018 and 2017 Annual Performance-Based RSU Grants

The 2019 Performance-Based RSUs are scheduled to vest at the end of a three year period (consisting of calendar years 2019-2021). A target number of 2019 Performance-Based RSUs were awarded, and the final number of 2019 Performance-Based RSUs that vest (which may be more or less than the target number) will be based upon (1) the achievement of pre-set FFO per share goals for the year ending December 31, 2019 that applies to 100% of the Performance-Based RSUs awarded (the “2019 FFO Performance Condition”) and (2) a performance measure that applies to 50% of the award based upon a measure of the Company’s average debt to EBITDA ratio for the three year performance period (the “2019 Debt to EBITDA Ratio Performance Condition”) and a market measure that applies to the other 50% of the award based upon the relative ranking of the Company’s total stockholder return for the three year performance period compared to the total stockholder returns of an established comparison group of companies over the same period (the “2019 Market Condition”). The 2019 Performance-Based RSUs are also subject to a three year service vesting provision (the “service vesting condition”) and are scheduled to cliff vest on the date the final vesting percentage is determined following the end of the three year performance period under the awards. The 2019 FFO Performance Condition was achieved at 175% of target for one participant and 150% of target for all other participants. The number of 2019 Performance-Based RSUs ultimately earned could fluctuate from the target number of 2019 Performance-Based RSUs granted based upon the levels of achievement for the 2019 Debt to EBITDA Ratio

Performance Condition, the 2019 Market Condition, and the extent to which the service vesting condition is satisfied. The estimate of the number of 2019 Performance-Based RSUs earned is evaluated quarterly during the performance period based on our estimate for each of the performance conditions measured against the applicable goals. Compensation expense for the 2019 Performance-Based RSU grant is recognized on a straight-line basis over the requisite service period for each participant, which is generally the three year service period.

The 2018 Performance-Based RSUs are scheduled to vest at the end of a three year period (consisting of calendar years 2018-2020). A target number of 2018 Performance-Based RSUs were awarded, and the final number of 2018 Performance-Based RSUs that vest (which may be more or less than the target number) will be based upon (1) the achievement of pre-set FFO per share goals for the year ending December 31, 2018 that applies to 100% of the Performance-Based RSUs awarded (the “2018 FFO Performance Condition”) and (2) a performance measure that applies to 50% of the award based upon a measure of the Company’s average debt to EBITDA ratio for the three year performance period (the “2018 Debt to EBITDA Ratio Performance Condition” and together with the 2018 FFO Performance Condition, the “2018 Performance Conditions”) and a market measure that applies to the other 50% of the award based upon the relative ranking of the Company’s TSR for the three year performance period compared to the TSR of an established comparison group of companies over the same period (the “2018 Market Condition”). The 2018 Performance-Based RSUs are also subject to a three year service vesting provision and are scheduled to cliff vest on the date the final vesting percentage is determined following the end of the three year performance period under the awards. The 2018 FFO Performance Condition was achieved at 175% of target for one participant and 150% of target for all other participants. The number of 2018 Performance-Based RSUs ultimately earned could fluctuate from the current estimated number of 2018 Performance-Based RSUs granted based upon the levels of achievement for the 2018 Debt to EBITDA Ratio Performance Condition, the 2018 Market Condition and the extent to which the service vesting condition is satisfied.

The 2017 Performance-Based RSUs are scheduled to cliff vest at the end of a three year period (consisting of calendar years 2017-2019) based upon (1) the achievement of pre-defined FFO per share goals for the year ended December 31, 2017 that applies to 100% of the 2017 Performance-Based RSUs awarded (the “2017 FFO Performance Condition”) and (2) also based upon either the average FAD per share growth that applies to 30% of the award or the Company’s average debt to EBITDA ratio that applies to a separate 30% of the award (together, the “Other 2017 Performance Conditions” and together with the 2017 FFO Performance Condition, the “2017 Performance Conditions”) or the relative TSR versus a comparative group of companies that consist of companies in the SNL US REIT Office Index that applies to the remaining 40% of the award (the “2017 Market Condition”) for the three year period ending December 31, 2019. Based on the combined results of the 2017 Performance Conditions and the 2017 Market Condition, the 2017 Performance-Based RSUs achieved a weighted average of approximately 131% of their target level of performance.

As of December 31, 2019, the estimated number of RSUs earned for the 2019 and 2018 Performance-Based RSUs and the actual number of RSUs earned for the 2017 Performance-Based RSUs was as follows:

	2019 Performance-Based RSUs	2018 Performance-Based RSUs	2017 Performance-Based RSUs
Service vesting period	February 1, 2019 - January, 2022	February 14, 2018 - January, 2021	February 24, 2017 - January, 2020
Target RSUs granted	143,396	158,205	130,956
Estimated RSUs earned (1)	229,095	262,242	142,581
Date of valuation	February 1, 2019	February 14, 2018	February 24, 2017

_______________

(1) Estimated RSUs earned for the 2019 Performance-Based RSUs are based on the actual achievement of the 2019 FFO Performance Condition and for the 2019 Debt to EBITDA Ratio Performance Condition, assumes 125% of the target level of achievement for one participant and 117% of the target level of achievement for all other participants, and target level of achievement of the 2019 Market Condition. Estimated RSUs earned for the 2018 Performance-Based RSUs are based on the actual achievement of the 2018 FFO Performance Condition and assume target level achievement of the 2018 Market Condition and maximum level of achievement of the 2018 Debt to EBITDA Ratio Performance Condition. The 2017 Performance-Based RSUs earned are based on actual performance of the 2017 Performance Conditions and the 2017 Market Condition.

Each Performance-Based RSU represents the right to receive one share of our common stock in the future, subject to, and as modified by, the Company’s level of achievement of the applicable performance and market conditions. The fair values of the 2019 Performance-Based RSUs, 2018 Performance-Based RSUs and 2017 Performance-Based RSUs

were $10.2 million at February 1, 2019, $10.8 million at February 14, 2018, and $10.3 million at February 24, 2017, respectively. The fair values for the awards with market conditions were calculated using a Monte Carlo simulation pricing model based on the assumptions in the table below. The determination of the fair value of the 2019, 2018 and 2017 Performance-Based RSUs takes into consideration the likelihood of achievement of the 2019, 2018 and 2017 Performance Conditions and the 2019, 2018 and 2017 Market Conditions, respectively, as discussed above. The following table summarizes the assumptions utilized in the Monte Carlo simulation pricing models:

	2019 Award Fair Value Assumptions	2018 Award Fair Value Assumptions	2017 Award Fair Value Assumptions
Valuation date	February 1, 2019	February 14, 2018	February 24, 2017
Fair value per share on valuation date	$72.57	$70.08	$80.89
Expected share price volatility	19.0%	20.0%	21.0%
Risk-free interest rate	2.48%	2.37%	1.39%

The computation of expected volatility was based on a blend of the historical volatility of our shares of common stock over a period of twice the remaining performance period as of the grant date and implied volatility data based on the observed pricing of six month publicly-traded options on shares of our common stock. The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury STRIP securities in effect at February 1, 2019, February 14, 2018, and February 24, 2017.

Compensation expense for the Performance-Based RSUs is recognized on a straight-line basis over the requisite service period for each participant, which is generally the three-year service period. As of December 31, 2019, the number of 2019 Performance-Based RSUs estimated to be earned based on the Company’s estimate of the performance conditions measured against the applicable goals was 229,095, and the compensation cost recorded to date for this program was based on that estimate. For the portion of the 2019 Performance-Based RSUs subject to the 2019 Market Condition, for the year ended December 31, 2019, we recorded compensation expense based upon the $72.57 fair value per share at February 1, 2019. Compensation expense will be variable for the portion of the 2019 Performance-Based RSUs subject to the 2019 Debt to EBITDA Ratio Performance Condition, based upon the outcome of that condition. As of December 31, 2019, the number of 2018 Performance-Based RSUs estimated to be earned based on the Company’s estimate of the performance conditions measured against the applicable goals was 262,242, and the compensation cost recorded to date for this program was based on that estimate. For the portion of the 2018 Performance-Based RSUs subject to the 2018 Market Condition, for the years ended December 31, 2019 and 2018, we recorded compensation expense based upon the $70.08 fair value per share at February 14, 2018. Compensation expense will be variable for the portion of the 2018 Performance-Based RSUs subject to the 2018 Debt to EBITDA Performance Condition, based upon the outcome of that condition. For the years ended December 31, 2019, 2018 and 2017, we recorded compensation expense for the portion of the 2017 Performance-Based RSUs subject to the 2017 Market Condition based upon the $80.89 fair value per share at February 24, 2017 and for the portion of the 2017 Performance-Based RSUs subject to the 2017 Debt to EBITDA Ratio Performance Condition, based on the stock price at date of grant multiplied by the 142,581 RSUs, which is net of forfeitures, estimated to be earned at December 31, 2019.

Annual 2019, 2018 and 2017 and December 2018 Time-Based RSU Grants

The annual 2019, 2018 and 2017 Time-Based RSUs are scheduled to vest in equal installments over the periods listed below. The 2019 Time-Based RSUs are scheduled to vest in three equal annual installments beginning on January 5, 2020 through January 5, 2022. The December 2018 Time-Based RSUs are scheduled to vest 50% on January 5, 2022 and 50% on January 5, 2023. Compensation expense for the December 2018 and annual 2019, 2018 and 2017 Time-Based RSUs is recognized on a straight-line basis over the requisite service period, which is generally the explicit service period. However, for one participant there was a shorter service period for their 2017 and 2018 Time-Based RSUs. Each Time-Based RSU represents the right to receive one share of our common stock in the future, subject to continued employment through the applicable vesting date. The total fair value of the Time-Based RSUs is based on the Company's closing share price on the NYSE on the respective fair valuation dates as detailed in the table below:

	2019 Time-Based RSU Grant		December 2018 Time-Based RSU Grant		2018 Time-Based RSU Grant (1)		2017 Time-Based RSU Grant (2)
Service vesting period	February 1, 2019 - January 5, 2022		December 27, 2018 - January 5, 2023		January & February 2018 - January 5, 2021		February 2017 - January 5, 2020
Fair value on valuation date (in millions)	$	10.1	$	18.5	$	8.4	$	7.5
Fair value per share	$	69.89	$	62.00	$	70.37	$	73.30
Date of fair valuation	February 1, 2019		December 27, 2018		January & February 2018		February 2017

_______________

(1) The 2018 Time-Based RSUs consist of 56,015 RSUs granted on January 29, 2018 at a fair value per share of $70.37 and 67,818 RSUs granted on February 14, 2018 at a fair value per share of $66.46.

(2) The 2017 Time-Based RSUs consist of 41,119 RSUs granted on February 3, 2017 at a fair value per share of $73.30 and 57,901 RSUs granted on February 24, 2017 at a fair value per share of $77.16.

Summary of Performance and Market-Measure Based RSUs

A summary of our performance and market-measure based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted-Average Fair Value Per Share
Outstanding at January 1, 2019	1,018,337		$	67.29	35,761		1,054,098
Granted	231,191		71.12		1,155		232,346
Vested	(261,990	)	57.08		261,990		—
Settled (1)	—				(264,814	)	(264,814	)
Issuance of dividend equivalents (2)	23,254		74.11		2,592		25,846
Forfeited	(78,117	)	70.07		(5	)	(78,122	)
Outstanding as of December 31, 2019 (3)	932,675		$	71.04	36,679		969,354

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 125,220 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3) Outstanding RSUs as of December 31, 2019 represent the actual achievement of the FFO performance conditions and assumes target levels for the market and other performance conditions. The number of restricted stock units ultimately earned is subject to change based upon actual performance over the three-year vesting period. Dividend equivalents earned will vest along with the underlying award and are also subject to changes based on the number of RSUs ultimately earned for each underlying award.

A summary of our performance and market-measure based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Years ended December 31,	Non-Vested RSUs Granted (1)	Weighted-Average Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (in thousands)
2019	231,191	$	71.12	(265,737	)	$	18,703
2018	601,012	68.51		(265,918	)	18,906
2017	170,994	78.97		(194,991	)	14,270

_______________

(1) Non-vested RSUs granted are based on the actual achievement of the FFO performance conditions and assumes target level achievement for the market and other performance conditions.

Summary of Time-Based RSUs

A summary of our time-based RSU activity from January 1, 2019 through December 31, 2019 is presented below:

	Nonvested RSUs				Vested RSUs		Total RSUs
	Amount		Weighted Average Fair Value Per Share
Outstanding at January 1, 2019	586,779		$	65.87	1,089,088		1,675,867
Granted	153,005		70.31		—		153,005
Vested	(153,464	)	67.26		153,464		—
Settled (1)					(198,183	)	(198,183	)
Issuance of dividend equivalents (2)	13,341		74.72		28,755		42,096
Forfeited	(55,813	)	68.71		—		(55,813	)
Canceled (3)					(1,746	)	(1,746	)
Outstanding as of December 31, 2019	543,848		$	66.66	1,071,378		1,615,226

_______________

(1) Represents vested RSUs that were settled in shares of the Company’s common stock. Total shares settled include 82,646 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the RSUs settled. We accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.

(2) Represents the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

(3) For shares vested but not yet settled, we accept the return of RSUs at the current quoted closing share price of the Company’s common stock to satisfy minimum statutory tax-withholding requirements related to either the settlement or vesting of RSUs in accordance with the terms of the 2006 Plan.

A summary of our time-based RSU activity for the years ended December 31, 2019, 2018 and 2017 is presented below:

	RSUs Granted			RSUs Vested
Year ended December 31,	Non-Vested RSUs Issued	Weighted-Average Grant Date Fair Value Per Share		Vested RSUs		Total Vest-Date Fair Value (1) (in thousands)
2019	153,005	$	70.31	(182,219	)	$	12,277
2018	437,216	64.21		(214,131	)	14,768
2017	142,101	74.91		(228,095	)	16,735

_______________

(1) Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting. Excludes the issuance of dividend equivalents earned on the underlying RSUs. The dividend equivalents vest based on terms specified under the related RSU award agreement.

Summary of Nonvested Restricted Stock

We did not have any nonvested restricted stock at January 1, 2019 or December 31, 2019. A summary of our nonvested and vested restricted stock activity for years ended December 31, 2018 and 2017 is presented below:

	Shares Granted		Shares Vested
Years ended December 31,	Nonvested Shares Issued	Weighted-Average Grant Date Fair Value Per Share	Vested Shares		Total Fair Value at Vest Date (1) (in thousands)
2018	—	—	(22,884	)	1,652
2017	—	—	(24,261	)	1,781

_______________

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.

Share-Based Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $32.8 million, $35.9 million and $26.3 million for the years ended December 31, 2019, 2018 and 2017, respectively. Of the total share-based compensation costs, $5.8 million, $8.0 million and $7.3 million was capitalized as part of real estate assets and for 2018 and 2017, deferred leasing costs, for the years ended December 31, 2019, 2018 and 2017, respectively. As of December 31, 2019, there was approximately $50.5 million of total unrecognized compensation cost related to nonvested incentive awards granted under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 2.1 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to December 31, 2019. The $50.5 million of unrecognized compensation costs does not reflect the future compensation cost related to share-based awards that were granted subsequent to December 31, 2019.

Other Compensation

On December 27, 2018, the Executive Compensation Committee of the Company’s Board approved, and the Company and the Operating Partnership entered into the Amended Employment Agreement with John Kilroy, which amends and supersedes the existing employment agreement dated January 1, 2012. Except as noted below, the Amended Employment Agreement continues Mr. Kilroy’s employment on terms substantially similar to those of the existing employment agreement, with a new term scheduled to continue through December 31, 2023. The Amended Employment Agreement includes a cash retirement benefit of $13.2 million, or $16.2 million for a retirement at or after attaining age 73, with at least twelve months’ advance notice or at or after the end of the term of the agreement. For the year ended December 31, 2018, the Company recognized $12.1 million of compensation expense in general and administrative expenses on the consolidated statement of operations, representing the present value of the potential cash retirement benefit amount that was earned based on prior service. For the year ended December 31, 2019, the Company recognized $1.5 million of compensation expense in general and administrative expenses on the consolidated statement of operations related to the Amended Employment Agreement.

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Supplemental Cash Flow Information of the Company - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Roll Forward]
Cash and cash equivalents	$ 60,044	$ 51,604	$ 57,649	$ 193,418
Restricted cash	16,300	119,430	9,149	56,711
Cash and cash equivalents and restricted cash	$ 76,344	$ 171,034	$ 66,798	$ 250,129

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Other Significant Events - Narrative (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($) tenant	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 220,235	$ 215,525	$ 200,492	$ 201,202	$ 190,842	$ 186,562	$ 187,072	$ 182,822	$ 837,454	$ 747,298	$ 719,001
Provision for bad debts									0	5,685	3,269
Provisions for bad debts, increase (decrease)							(1,400)
Tenant one [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for bad debts							$ 7,000
Number of tenants | tenant							1
Rental [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues									826,472	$ 656,631	$ 633,896
Rental [Member] | Accounting Standards Update 2016-02 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues									2,900
Rental [Member] | Accounting Standards Update 2016-02 [Member] | Tenant one [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues									4,200
Rental [Member] | Accounting Standards Update 2016-02 [Member] | Other tenants [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues									$ (1,300)

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Noncontrolling Interests on the Company’s Consolidated Financial Statements

12 Months Ended

Dec. 31, 2019

Noncontrolling Interest [Abstract]

Noncontrolling Interests on the Company’s Consolidated Financial Statements

Noncontrolling Interests on the Company’s Consolidated Financial Statements

Common Units of the Operating Partnership

The Company owned a 98.1% and 98.0% common general partnership interest in the Operating Partnership as of December 31, 2019 and 2018, respectively. The remaining 1.9% and 2.0% common limited partnership interest as of December 31, 2019 and 2018, respectively, was owned by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 2,023,287 and 2,025,287 common units outstanding held by these investors, executive officers and directors as of December 31, 2019 and 2018, respectively. The decrease in the common units from December 31, 2018 to December 31, 2019 was attributable to 2,000 common unit redemptions.

The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $167.7 million and $126.4 million as of December 31, 2019 and 2018, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

Noncontrolling Interest in Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with Norges Bank Real Estate Management (“NBREM”) whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. The transactions did not meet the criteria to qualify as sales of real estate because the Company continues to effectively control the properties and therefore continued to account for the 100 First Street and 303 Second Street office properties on a consolidated basis in its financial statements. At formation, the Company accounted for the transactions as equity transactions and recognized noncontrolling interests in its consolidated balance sheets.

The noncontrolling interests in 100 First LLC and 303 Second LLC as of December 31, 2019 and 2018 were $189.6 million and $186.4 million, respectively. The remaining amount of noncontrolling interests in consolidated property partnerships represents the third party equity interest in Redwood LLC. This noncontrolling interest was $5.8 million and $6.0 million as of December 31, 2019 and 2018, respectively.

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with NBREM whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. Refer to Note 11 for additional information regarding these consolidated property partnerships.

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Prepaid Expenses and Other Assets, Net

12 Months Ended

Dec. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other Assets, Net

Prepaid Expenses and Other Assets, Net

Prepaid expenses and other assets, net consisted of the following at December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Furniture, fixtures and other long-lived assets, net	$	35,286	$	36,833
Notes receivable (1)	1,651		2,113
Prepaid expenses	18,724		13,927
Total prepaid expenses and other assets, net	$	55,661	$	52,873

_______________

(1)

Notes receivable are shown net of a valuation allowance of approximately $3.6 million and $2.9 million as of December 31, 2019 and 2018, respectively.

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Commitments and Contingencies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) ground_lease	Dec. 31, 2018 USD ($)
Long-term Purchase Commitment [Line Items]
Commitments for contracts and executed leases, operating and redevelopment and development properties	$ 1,000.0
Weighted average remaining lease term	55 years
Variable lease, cost	$ 2.9
Period after which ground lease rentals are adjusted based on fair market value and the Consumer Price Index	5 years	5 years
Annual ground lease rental obligations limit	$ 1.0	$ 1.0
Duration of ground lease prior to increase five years	5 years
Average annual percentage rent for previous five years (percent)	50.00%
Duration of ground lease prior to increase ten years	10 years
Average annual percentage rent for previous ten years (percent)	60.00%	60.00%
Ground lease fixed ground rent increase, percent	5.00%
Ten year ground lease extension option [Member]
Long-term Purchase Commitment [Line Items]
Number of extension options | ground_lease	3
Ground lease extension option term		10 years
Forty-five year ground lease extension option [Member]
Long-term Purchase Commitment [Line Items]
Number of extension options | ground_lease	1
Ground lease extension option term	45 years
Environmental matters [Member]
Long-term Purchase Commitment [Line Items]
Accrued environmental remediation liabilities	$ 80.7	$ 83.2

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Share-Based and Other Compensation - Summary of Market-Measure Based RSUs (Details) - Market measure-based Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested (in shares)	(265,737)	(265,918)	(194,991)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
RSU weighted average fair value, beginning balance (in dollars per share)	$ 67.29
Fair value per share on valuation date (in dollars per share)	71.12
Weighted average grant date fair value, vested (in dollars per share)	57.08
Weighted average fair value, issuance of dividend equivalents (in dollars per share)	74.11
Weighted average fair value, forfeited (in dollars per share)	70.07
RSU weighted average fair value, ending balance (in dollars per share)	$ 71.04	$ 67.29
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of RSUs outstanding, beginning balance (in shares)	1,018,337
Granted (in shares)	231,191	601,012	170,994
Vested (in shares)	(261,990)
Issuance of dividend equivalents (in shares)	23,254
Forfeited (in shares)	(78,117)
Number of RSUs outstanding, ending balance (in shares)	932,675	1,018,337
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Fair value per share on valuation date (in dollars per share)	$ 71.12	$ 68.51	$ 78.97
Vested Restricted Stock Units R S U [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested RSUs, beginning balance (in shares)	35,761
Granted (in shares)	1,155
Vested (in shares)	(261,990)
Settled (in shares)	(264,814)
Issuance of dividend equivalents (in shares)	2,592
Forfeited (in shares)	(5)
Vested RSUs, ending balance (in shares)	36,679	35,761
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Total RSUs, beginning balance (in shares)	1,054,098
Granted (in shares)	232,346
Vested (in shares)	0
Settled (in shares)	(264,814)
Issuance of dividend equivalents (in shares)	25,846
Forfeited (in shares)	(78,122)
Total RSUs, ending balance (in shares)	969,354	1,054,098
Kilroy Realty 2006 Incentive Award Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Settled (in shares)	(125,220)

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

General

As of December 31, 2019, we had commitments of approximately $1.0 billion, excluding our ground lease commitments, for contracts and executed leases directly related to our operating and development properties.

Ground Leases

The following table summarizes our properties that are held subject to long-term noncancellable ground lease obligations and the respective contractual expiration dates:

Property	Contractual Expiration Date (1)
601 108th Ave NE, Bellevue, WA	November 2093
701, 801 and 837 N. 34th Street, Seattle, WA (2)	December 2041
1701 Page Mill Road and 3150 Porter Drive, Palo Alto, CA	December 2067
Kilroy Airport Center Phases I, II, and III, Long Beach, CA	July 2084
3243 S. La Cienega Boulevard, Los Angeles, CA (3)	October 2106

____________________

(1) Reflects the contractual expiration date prior to the impact of any extension or purchase options held by the Company.

(2) The Company has three 10-year and one 45-year extension options for this ground lease, which if exercised would extend the expiration date to December 2116.

(3) We entered into this ground lease in connection with an operating property acquisition in 2019. Refer to Note 3 “Acquisitions” for additional information.

As of December 31, 2019, the weighted average remaining lease term of our ground leases is 55 years. For the year ended December 31, 2019, variable lease costs totaling $2.9 million, were recorded to ground leases expense on our consolidated statements of operations.

The minimum commitment under our ground leases as of December 31, 2019 for five years and thereafter is as

follows:

Year Ending	(in thousands)
2020	5,641
2021	5,641
2022	5,642
2023	5,662
2024	5,662
Thereafter	286,385
Total undiscounted cash flows (1)(2)(3)(4)(5)(6)	$	314,633
Present value discount	(216,233		)
Ground lease liabilities	$	98,400

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2019.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(5) One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every 10 years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(6) One of our ground lease obligations is subject to fixed 5% ground rent increases every five years, with the next increase occurring on December 1, 2022.

The minimum commitment under our ground leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	5,154
2020	5,154
2021	5,154
2022	5,154
2023	5,154
Thereafter	233,619
Total (1)(2)(3)(4)(5)	$	259,389

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2018.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(5) One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every ten years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

Environmental Matters

We follow the policy of monitoring all of our properties, including acquisition, development, and existing stabilized portfolio properties, for the presence of hazardous or toxic substances. While there can be no assurance that a material environmental liability does not exist, we are not currently aware of any environmental liability with respect to our stabilized portfolio properties that would have a material adverse effect on our financial condition, results of operations and cash flow, or that we believe would require additional disclosure or the recording of a loss contingency.

As of December 31, 2019 and 2018, we had accrued environmental remediation liabilities of approximately $80.7 million and $83.2 million, respectively, recorded on our consolidated balance sheets in connection with certain of our in-process and future development projects. The accrued environmental remediation liabilities represent the remaining costs we estimate we will incur prior to and during the development process at various development acquisition sites. These estimates, which we developed with the assistance of third party experts, consist primarily of the removal of contaminated soil, performing environmental closure activities, constructing remedial systems, and other related costs since we are required to dispose of any existing contaminated soil, and sometimes perform other environmental closure or remedial activities, when we develop new buildings at these sites.

We record estimated environmental remediation obligations for acquired properties at the acquisition date when we are aware of such costs and when such costs are probable of being incurred and can be reasonably estimated. Estimated costs related to development environmental remediation liabilities are recorded as an increase to the cost of the development project. Actual costs are recorded as a decrease to the liability when incurred. These accruals are adjusted as an increase or decrease to the development project costs and as an increase or decrease to the accrued environmental remediation liability if we obtain further information or circumstances change. The environmental remediation obligations recorded at December 31, 2019 and 2018 were not discounted to their present values since the amount and timing of cash payments are not fixed. It is possible that we could incur additional environmental remediation costs in connection with these development projects.  However, potential additional environmental costs for these development projects cannot be reasonably estimated at this time and certain changes in estimates could occur as the site conditions, final project timing, design elements, actual soil conditions and other aspects of the projects, which may depend upon municipal and other approvals beyond the control of the Company, are determined.

Other than the accrued environmental liabilities discussed above, we are not aware of any unasserted claims and assessments with respect to an environmental liability that we believe would require additional disclosure or the recording of an additional loss contingency.

Litigation

We and our properties are subject to litigation arising in the ordinary course of business. To our knowledge, neither we nor any of our properties are presently subject to any litigation or threat of litigation which, if determined unfavorably to us, would have a material adverse effect on our cash flow, financial condition, or results of operations.

Insurance

We maintain commercial general liability, auto liability, employers’ liability, umbrella/excess liability, special form property, difference in conditions including earthquake and flood, environmental, rental loss, and terrorism insurance covering all of our properties. Management believes the policy specifications and insured limits are reasonable given the relative risk of loss, the cost of the coverage, and industry practice. We do not carry insurance for generally uninsurable losses such as loss from governmental action, nuclear hazard, and war and military action. Policies are subject to various terms, conditions, and exclusions and some policies may involve large deductibles or co-payments.

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Net Income Available to Common Unitholders Per Unit of the Operating Partnership

12 Months Ended

Dec. 31, 2019

Kilroy Realty L.P. [Member]

Net Income Available To Common Unitholders [Line Items]

Net Income Available to Common Unitholders per Unit of the Operating Partnership

Net Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net income available to common unitholders for the years ended 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	198,738		$	263,210		$	167,440
Total preferred distributions	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common unitholders	$	196,619		$	261,206		$	152,102
Denominator:
Basic weighted average vested units outstanding	105,223,975			102,025,276			100,246,567
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested units and common unit equivalents outstanding	105,872,575			102,535,282			100,860,337
Basic earnings per unit:
Net income available to common unitholders per unit	$	1.87		$	2.56		$	1.52
Diluted earnings per unit:
Net income available to common unitholders per unit	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common units, including stock options, RSUs, shares issuable under executed forward equity sale agreements and other securities are considered in our diluted earnings per share calculation for the years ended December 31, 2019, 2018 and 2017. Certain market measure-based RSUs are not included in dilutive securities as of December 31, 2019, 2018 and 2017 as not all performance metrics had been met by the end of the applicable reporting periods.

See Note 15 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

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Share-Based and Other Compensation - Time-Based Restricted Stock Unit Activity (Details) - Time-Based Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)	(182,219)	(214,131)	(228,095)
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	153,005	437,216	142,101
Fair value per share on valuation date (in dollars per share)	$ 70.31	$ 64.21	$ 74.91
Vested (in shares)	(153,464)
Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0
Vested (in shares)	(153,464)
Total Fair Value at Vest Date	$ 12,277	$ 14,768	$ 16,735

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Future Minimum Rent - Future Contractual Minimum Rent (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Future contractual minimum rent under operating lease
2020	$ 675,636
2021	728,736
2022	785,239
2023	769,294
2024	727,399
Thereafter	4,054,487
Total	$ 7,740,791
Future contractual minimum rent under operating lease
2019		$ 566,783
2020		632,875
2021		631,835
2022		620,684
2023		586,371
Thereafter		3,240,143
Total		$ 6,278,691

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Quarterly Financial Information of the Company (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information of the Company (Unaudited)

Quarterly Financial Information of the Company (Unaudited)

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows: 

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to Kilroy Realty Corporation	36,903		42,194		43,846		72,500
Net income available to common stockholders	36,903		42,194		43,846		72,500
Net income available to common stockholders per share – basic	0.36		0.41		0.41		0.68
Net income available to common stockholders per share – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to Kilroy Realty Corporation	36,246		27,549		34,400		160,220
Net income available to common stockholders	36,246		27,549		34,400		160,220
Net income available to common stockholders per share – basic	0.36		0.27		0.34		1.59
Net income available to common stockholders per share – diluted	0.36		0.27		0.33		1.58

____________________

(1)

The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering activity during the year.

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Schedule II - Valuation and Qualifying Accounts - Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Notes receivable, valuation allowance	$ 700
Notes receivable, valuation allowance	3,600	$ 2,900
Uncollectible tenant receivables [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period (1)	4,639	2,309	$ 1,712
Balance at Beginning of Period (1)	512
Charged to Costs and Expenses	907	2,604	1,517
Recoveries (Deductions)	(248)	(274)	(920)
Balance at End of Period	1,171	4,639	2,309
Balance at End of Period		512
Allowance for deferred rent [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period (1)	3,339	3,238	1,524
Balance at Beginning of Period (1)	195
Charged to Costs and Expenses	1,357	165	1,752
Recoveries (Deductions)	0	(64)	(38)
Balance at End of Period	$ 1,552	3,339	$ 3,238
Balance at End of Period		$ 195

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Acquisitions

12 Months Ended

Dec. 31, 2019

Asset Acquisitions [Abstract]

Acquisitions

Acquisitions

Operating Property Acquisitions

During the year ended December 31, 2019, we acquired the 19-building creative office campus listed below in one transaction from an unrelated third party. During the year ended December 31, 2018, we acquired the four operating properties listed below in two transactions from unrelated third parties.

Property	Date of Acquisition	Number of Buildings	Rentable Square Feet (unaudited)	Occupancy as of December 31, 2019 (unaudited)		Purchase Price (in millions) (1)
2019 Acquisitions
3101-3243 La Cienega Boulevard, Culver City, CA (2)	October 15, 2019	19	151,908	100.0	%	$	186.0
2018 Acquisitions
345, 347 & 349 Oyster Point Boulevard, South San Francisco, CA	January 31, 2018	3	145,530	100.0	%	$	111.0
345 Brannan Street, San Francisco, CA (3)	December 21, 2018	1	110,050	99.7	%	146.0
Total (4)		4	255,580			$	257.0

________________________ 

(1) Excludes acquisition-related costs.

(2) The results of operations for the properties acquired during 2019 contributed $3.7 million to revenue and a net loss of $0.1 million primarily due to a write-off of lease-related intangible assets as a result of an early lease termination.

(3) At December 31, 2018, this property was temporarily being held in a separate VIE to facilitate potential Section 1031 Exchanges. During January 2019, the Company completed the Section 1031 Exchange related to this VIE.

(4) The results of operations for the properties acquired during 2018 contributed $8.0 million and $1.7 million to revenue and net income, respectively, for the year ended December 31, 2018.

The related assets, liabilities and results of operations of the acquired properties are included in the consolidated financial statements as of the date of acquisition. The following table summarizes the estimated fair values of the assets and liabilities assumed at the respective acquisition dates for our 2019 and 2018 operating property acquisitions, respectively:

	Total 2019 Operating Property Acquisitions (1)		Total 2018 Operating Property Acquisitions (2)
Assets
Land and improvements	$	150,561	$	80,269
Buildings and improvements (3)	30,932		172,059
Deferred leasing costs and acquisition-related intangible assets (4)	12,063		13,593
Right of use ground lease asset (5)	13,334		—
Total assets acquired	$	206,890	$	265,921
Liabilities
Acquisition-related intangible liabilities (6)	$	9,950	$	8,921
Ground lease liability (5)	10,940		—
Total liabilities assumed	$	20,890	$	8,921
Net assets and liabilities acquired	$	186,000	$	257,000

________________________ 

(1) The purchase price of the acquisition completed during the year ended December 31, 2019 was less than 10% of the Company’s total assets as of December 31, 2018.

(2) The purchase price of the two acquisitions completed during the year ended December 31, 2018 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2017.

(3) Represents buildings, building improvements and tenant improvements.

(4) For the 2019 operating property acquisition, represents in-place leases (approximately $9.2 million with a weighted average amortization period of 3.3 years) and leasing commissions (approximately $2.9 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents in-place leases (approximately $11.8 million with a weighted average amortization period of 1.3 years) and leasing commissions (approximately $1.8 million with a weighted average amortization period of 6.6 years).

(5) We evaluated the ground lease assumed in connection with the 2019 operating property acquisition and concluded it met the criteria to be classified as an operating lease. The discount rate used in determining the present value of the minimum future lease payments was 4.79%. The right of use asset ground lease asset is equal to the ground lease liability adjusted for above and below market intangibles and deferred leasing costs. Refer to Note 18 “Commitments and Contingencies” for further discussion of the Company's ground lease obligations.

(6) For the 2019 operating property acquisition, represents below-market leases (approximately $10.0 million with a weighted average amortization period of 3.5 years). For the 2018 operating property acquisitions, represents below-market leases (approximately $8.9 million with a weighted average amortization period of 9.8 years).

Development Project Acquisitions

During the year ended December 31, 2019, we acquired the following development sites in two transactions from unrelated third parties. The acquisitions were funded from various sources of liquidity including proceeds from the Company’s unsecured revolving credit facility, the issuance of debt and the settlement of the Company’s 2018 forward equity sales agreements. During the year ended December 31, 2018, we acquired a development site adjacent to the three operating properties we acquired in January 2018, from an unrelated third party. The acquisition was funded with proceeds from the Company’s unsecured revolving credit facility and the Company’s at-the-market stock offering program.

Project	Date of Acquisition	City/Submarket	Purchase Price (in millions)
2019 Acquisitions
1335 Broadway & 901 Park Boulevard, San Diego, CA (1)	August 19, 2019	East Village	$	40.0
Seattle CBD Project (2)	December 12, 2019	Seattle CBD	133.0
Total 2019 Acquisitions			$	173.0
2018 Acquisitions
Kilroy Oyster Point (3)	June 1, 2018	South San Francisco	$	308.2
Total 2018 Acquisitions			$	308.2

________________________ 

(1) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $4.0 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

(2) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $6.3 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2019, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets. In addition, as of December 31, 2019, the Company had $10.0 million in restricted cash, which is excluded from the purchase price above, related to this acquisition which may be payable to the seller only if certain events occur within three years following the date of acquisition.

(3) Excludes acquisition-related costs. In connection with this acquisition, we also recorded $40.6 million in accrued liabilities and environmental remediation liabilities at the date of acquisition, which are not included in the purchase price above. As of December 31, 2018, the purchase price and our current estimate of assumed liabilities are included in undeveloped land and construction in progress and the assumed liabilities are included in accounts payable, accrued expenses and other liabilities on the Company’s consolidated balance sheets.

In addition to the acquisitions listed above, during 2019, we acquired an additional land parcel for an existing development project for $99.5 million.

Acquisition Costs

During the years ended December 31, 2019, 2018, and 2017, we capitalized $1.6 million, $3.8 million, and $4.6 million, respectively, of acquisition costs.

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CONSOLIDATED STATEMENTS OF CAPITAL (KILROY REALTY, L.P.) - Parenthetical - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Kilroy Realty L.P. [Member]
Distributions declared per common unit (in dollars per units)	$ 1.91000	$ 1.79000	$ 1.650

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Tax Treatment of Distributions - Dividends Tax Treatment (Details) - $ / shares		12 Months Ended
	Jan. 13, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)	$ 0.313
Capital gains, federal statutory tax rate		20.00%
Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 1.880	$ 1.760	$ 3.500
Tax Treatment, Ordinary income [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 0.939	$ 1.474	$ 1.356
Dividends paid per common share, percentage		49.95%	83.73%	70.87%
Tax Treatment, Qualified dividend [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 0.004	$ 0.003	$ 0.002
Dividends paid per common share, percentage		0.21%	0.19%	0.11%
Tax Treatment, Return of capital [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 0.312	$ 0.275	$ 0.344
Dividends paid per common share, percentage		16.62%	15.64%	18.00%
Tax Treatment, Capital gains [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 0.600	$ 0.008	$ 0
Dividends paid per common share, percentage		31.93%	0.44%	0.00%
Tax Treatment, Unrecaptured section 1250 gains [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 0.025	$ 0	$ 0.211
Dividends paid per common share, percentage		1.29%	0.00%	11.02%
Tax treatment [Member] | Common Stock [Member]
Income Tax Treatment of Dividends Paid [Line Items]
Dividends paid per common share (in dollars per share)		$ 1.880	$ 1.760	$ 1.913
Dividends paid per common share, percentage		100.00%	100.00%	100.00%

XML

CONSOLIDATED BALANCE SHEETS (KILROY REALTY, L.P.) (Parenthetical) - Common units [Member] - Kilroy Realty L.P. [Member] - shares	Dec. 31, 2019	Dec. 31, 2018
General partner, units issued (in units)	106,016,287	100,746,988
General partner, units outstanding (in units)	106,016,287	100,746,988
Limited partner, units issued (in units)	2,023,287	2,025,287
Limited partner, units outstanding (in units)	2,023,287	2,025,287

XML

Cover Page - USD ($)

12 Months Ended

Dec. 31, 2019

Feb. 07, 2020

Jun. 30, 2019

Entity Information [Line Items]

Document Type

10-K

Document Annual Report

true

Document Period End Date

Dec. 31, 2019

Document Transition Report

false

Entity File Number

1-12675

Entity Registrant Name

KILROY REALTY CORPORATION

Entity Central Index Key

0001025996

Current Fiscal Year End Date

--12-31

Document Fiscal Year Focus

2019

Document Fiscal Period Focus

FY

Amendment Flag

false

Entity Incorporation, State or Country Code

MD

Entity Tax Identification Number

95-4598246

Entity Address, Address Line One

12200 W. Olympic Boulevard

Entity Address, Address Line Two

Suite 200

Entity Address, City or Town

Los Angeles

Entity Address, State or Province

CA

Entity Address, Postal Zip Code

90064

City Area Code

(310)

Local Phone Number

481-8400

Title of 12(b) Security

Common Stock, $.01 par value

Security Exchange Name

NYSE

Trading Symbol

KRC

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Large Accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

Entity Public Float

$ 7,416,459,726

Entity Common Stock, Shares Outstanding

106,167,149

Documents Incorporated by Reference

Portions of the Kilroy Realty Corporation’s Proxy Statement with respect to its 2020 Annual Meeting of Stockholders to be filed not later than 120 days after the end of the registrant’s fiscal year are incorporated by reference into Part III of this Form 10-K.

Kilroy Realty L.P. [Member]

Entity Information [Line Items]

Entity File Number

000-54005

Entity Registrant Name

KILROY REALTY, L.P.

Entity Central Index Key

0001493976

Current Fiscal Year End Date

--12-31

Document Fiscal Year Focus

2019

Document Fiscal Period Focus

FY

Amendment Flag

false

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

95-4612685

Title of 12(g) Security

Common Units Representing Limited Partnership Interests

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Non-accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

XML

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Stockholders' Equity	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Distributions in Excess of Earnings [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2016	$ 3,759,317	$ 3,542,995	$ 192,411	$ 932	$ 3,457,649	$ (107,997)	$ 216,322
Beginning balance (in shares) at Dec. 31, 2016				93,219,439
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	180,615	164,612				164,612	16,003
Redemption of Series G & H Preferred stock	(200,000)	(200,000)	(192,411)			(7,589)
Issuance of common stock	326,058	326,058		$ 46	326,012
Issuance of common stock (in shares)				4,662,577
Issuance of share-based compensation awards	5,890	5,890			5,890
Non-cash amortization of share-based compensation	26,319	26,319			26,319
Exercise of stock options	12,179	12,179		$ 4	12,175
Exercise of stock options (in shares)				285,000
Settlement of restricted stock units for shares of common stock	0			$ 3	(3)
Settlement of restricted stock units for shares of common stock (in shares)				317,848
Repurchase of common stock, stock options and restricted stock units	(12,986)			$ (2)	(12,984)
Repurchase of common stock, stock options and restricted stock units (in shares)				(168,881)
Exchange of common units of the Operating Partnership	0	10,939		$ 3	10,936		(10,939)
Exchange of common units of the Operating Partnership (in shares)				304,350
Contributions from noncontrolling interests in consolidated property partnerships	54,604	0			0		54,604
Distributions to noncontrolling interests in consolidated property partnerships	(16,542)						(16,542)
Adjustment for noncontrolling interest in the Operating Partnership	0	(3,502)			(3,502)		3,502
Preferred dividends and distributions	(5,774)	(5,774)				(5,774)
Dividends declared per share of common stock and common unit	(169,364)	(165,937)				(165,937)	(3,427)
Ending balance at Dec. 31, 2017	3,960,316	3,700,793	0	$ 986	3,822,492	(122,685)	259,523
Ending balance (in shares) at Dec. 31, 2017				98,620,333
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	277,926	258,415				258,415	19,511
Issuance of common stock	130,693	130,693		$ 18	130,675
Issuance of common stock (in shares)				1,817,195
Issuance of share-based compensation awards	3,926	3,926			3,926
Non-cash amortization of share-based compensation	35,890	35,890			35,890
Exercise of stock options	41	41			41
Exercise of stock options (in shares)				1,000
Settlement of restricted stock units for shares of common stock	0			$ 4	(4)
Settlement of restricted stock units for shares of common stock (in shares)				488,354
Repurchase of common stock, stock options and restricted stock units	(16,553)	(16,553)		$ (2)	(16,551)
Repurchase of common stock, stock options and restricted stock units (in shares)				(231,800)
Exchange of common units of the Operating Partnership	0	1,962		$ 1	1,961		(1,962)
Exchange of common units of the Operating Partnership (in shares)				51,906
Contributions from noncontrolling interests in consolidated property partnerships	8,273						8,273
Distributions to noncontrolling interests in consolidated property partnerships	(11,803)						(11,803)
Adjustment for noncontrolling interest in the Operating Partnership	0	(1,477)			(1,477)		1,477
Dividends declared per share of common stock and common unit	(187,448)	(183,783)				(183,783)	(3,665)
Ending balance at Dec. 31, 2018	$ 4,201,261	3,929,907	0	$ 1,007	3,976,953	(48,053)	271,354
Ending balance (in shares) at Dec. 31, 2018	100,746,988			100,746,988
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 215,229	195,443				195,443	19,786
Issuance of common stock	353,722	353,722		$ 50	353,672
Issuance of common stock (in shares)				5,000,000
Issuance of share-based compensation awards	4,664	4,664			4,664
Non-cash amortization of share-based compensation	32,813	32,813			32,813
Exercise of stock options	703	703			703
Exercise of stock options (in shares)				16,500
Settlement of restricted stock units for shares of common stock	0			$ 5	(5)
Settlement of restricted stock units for shares of common stock (in shares)				463,276
Repurchase of common stock, stock options and restricted stock units	(14,861)	(14,861)		$ (2)	(14,859)
Repurchase of common stock, stock options and restricted stock units (in shares)				(212,477)
Exchange of common units of the Operating Partnership	0	78			78		(78)
Distributions to noncontrolling interests in consolidated property partnerships	(12,952)						(12,952)
Adjustment for noncontrolling interest in the Operating Partnership	0	(3,102)			(3,102)		3,102
Dividends declared per share of common stock and common unit	(206,575)	(202,711)				(202,711)	(3,864)
Ending balance at Dec. 31, 2019	$ 4,570,858	$ 4,293,510	$ 0	$ 1,060	$ 4,350,917	$ (58,467)	$ 277,348
Ending balance (in shares) at Dec. 31, 2019	106,016,287			106,016,287

XML

Acquisitions - Development Project Acquisitions and Acquisition Costs (Details) $ in Thousands				12 Months Ended
	Dec. 12, 2019 USD ($)	Aug. 19, 2019 USD ($)	Jun. 01, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Purchase price				$ 173,000	$ 308,200
Asset acquisition, accrued liabilities				20,890	8,921
Restricted cash				16,300	119,430	$ 9,149	$ 56,711
Payments to acquire land parcel				99,500
Acquisition costs, capitalized				1,600	$ 3,800	$ 4,600
1335 Broadway & 901 Park Boulevard, San Diego, CA [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Purchase price		$ 40,000
Asset acquisition, accrued liabilities		$ 4,000
Seattle CBD Project [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Purchase price	$ 133,000
Asset acquisition, accrued liabilities				6,300
Restricted cash				$ 10,000
Kilroy Oyster Point [Member]
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of buildings | property					3
Purchase price			$ 308,200
Asset acquisition, accrued liabilities			$ 40,600

XML

Secured and Unsecured Debt of the Operating Partnership - Unsecured Senior Notes Table (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Nov. 30, 2018
Debt Instrument [Line Items]
Unsecured debt, net	$ 3,049,185		$ 2,552,070
Unsecured debt [Member]
Debt Instrument [Line Items]
Unamortized discount (premium), net	6,500		6,600
Unamortized debt issuance expense	18,700		15,400
Kilroy Realty L.P. [Member]
Debt Instrument [Line Items]
Unamortized debt issuance expense	20,300
Long-term debt, gross	3,579,502
Unsecured debt, net	3,049,185		2,552,070
Kilroy Realty L.P. [Member] | Unsecured debt [Member]
Debt Instrument [Line Items]
Unsecured debt, net	$ 2,899,839		2,402,979
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.050% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.05%	3.05%
Effective interest rate	3.064%
Long-term debt, gross	$ 500,000		0
Unamortized discount and deferred financing costs	(5,998)		0
Unsecured debt, net	$ 494,002		$ 0
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.750% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate			4.75%	4.75%
Effective interest rate	4.80%
Long-term debt, gross	$ 400,000		$ 400,000
Unamortized discount and deferred financing costs	(4,446)		(4,960)
Unsecured debt, net	$ 395,554		395,040
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.350% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	4.35%
Effective interest rate	4.35%
Long-term debt, gross	$ 200,000		200,000
Unamortized discount and deferred financing costs	(1,186)		(1,375)
Unsecured debt, net	$ 198,814		198,625
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.300% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	4.30%
Effective interest rate	4.30%
Long-term debt, gross	$ 50,000		50,000
Unamortized discount and deferred financing costs	(290)		(342)
Unsecured debt, net	$ 49,710		49,658
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.450% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.45%
Effective interest rate	3.47%
Long-term debt, gross	$ 425,000		425,000
Unamortized discount and deferred financing costs	(2,907)		(3,493)
Unsecured debt, net	$ 422,093		421,507
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.450% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.45%
Effective interest rate	3.45%
Long-term debt, gross	$ 75,000		75,000
Unamortized discount and deferred financing costs	(390)		(432)
Unsecured debt, net	$ 74,610		74,568
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.350% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.35%
Effective interest rate	3.35%
Long-term debt, gross	$ 175,000		175,000
Unamortized discount and deferred financing costs	(825)		(941)
Unsecured debt, net	$ 174,175		174,059
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.375% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	4.375%
Effective interest rate	4.444%
Long-term debt, gross	$ 400,000		400,000
Unamortized discount and deferred financing costs	(3,185)		(3,738)
Unsecured debt, net	$ 396,815		396,262
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 4.250% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	4.25%
Effective interest rate	4.35%
Long-term debt, gross	$ 400,000		400,000
Unamortized discount and deferred financing costs	(5,100)		(5,632)
Unsecured debt, net	$ 394,900		394,368
Kilroy Realty L.P. [Member] | Unsecured debt [Member] | 3.800% Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	3.80%
Effective interest rate	3.80%
Long-term debt, gross	$ 300,000		300,000
Unamortized discount and deferred financing costs	(834)		(1,108)
Unsecured debt, net	$ 299,166		$ 298,892

XML

Secured and Unsecured Debt of the Operating Partnership - Capitalized Interest and Loan Fees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Interest expense	$ 48,537	$ 49,721	$ 66,040
Kilroy Realty L.P. [Member]
Debt Instrument [Line Items]
Gross interest expense	129,778	117,789	112,577
Capitalized interest and deferred financing costs	(81,241)	(68,068)	(46,537)
Interest expense	$ 48,537	$ 49,721	$ 66,040

XML

Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net - Deferred Leasing Costs and Acquisition-related Intangible Assets and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net
Total deferred leasing costs and acquisition-related intangible assets, net	$ 212,805	$ 197,574
Acquisition-related Intangible Liabilities, Net [Abstract]
Total acquisitions-related intangible liabilities, net	24,092	29,138
Deferred leasing costs [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net
Finite-lived intangible assets/liabilities, gross	286,026	266,905
Accumulated amortization	(100,145)	(100,805)
Finite-lived intangible assets	185,881	166,100
Above market leases [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net
Finite-lived intangible assets/liabilities, gross	611	2,836
Accumulated amortization	(116)	(2,150)
Finite-lived intangible assets	495	686
In-place leases [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net
Finite-lived intangible assets/liabilities, gross	58,076	66,526
Accumulated amortization	(31,647)	(36,174)
Finite-lived intangible assets	26,429	30,352
Below-market ground lease obligation, net [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net
Finite-lived intangible assets/liabilities, gross	0	490
Accumulated amortization	0	(54)
Finite-lived intangible assets	0	436
Below-market operating leases [Member]
Acquisition-related Intangible Liabilities, Net [Abstract]
Acquisition-related intangible liabilities, gross	51,263	53,523
Accumulated amortization	(27,171)	(29,978)
Acquisition-related intangible liabilities, net	24,092	23,545
Above-market ground lease obligation [Member]
Acquisition-related Intangible Liabilities, Net [Abstract]
Acquisition-related intangible liabilities, gross	0	6,320
Accumulated amortization	0	(727)
Acquisition-related intangible liabilities, net	$ 0	$ 5,593

XML

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of contractual expiration dates for ground leases

The following table summarizes our properties that are held subject to long-term noncancellable ground lease obligations and the respective contractual expiration dates:

Property	Contractual Expiration Date (1)
601 108th Ave NE, Bellevue, WA	November 2093
701, 801 and 837 N. 34th Street, Seattle, WA (2)	December 2041
1701 Page Mill Road and 3150 Porter Drive, Palo Alto, CA	December 2067
Kilroy Airport Center Phases I, II, and III, Long Beach, CA	July 2084
3243 S. La Cienega Boulevard, Los Angeles, CA (3)	October 2106

____________________

(1) Reflects the contractual expiration date prior to the impact of any extension or purchase options held by the Company.

(2)

The Company has three 10-year and one 45-year extension options for this ground lease, which if exercised would extend the expiration date to December 2116.

Schedule of minimum commitment under ground leases

The minimum commitment under our ground leases as of December 31, 2019 for five years and thereafter is as

follows:

Year Ending	(in thousands)
2020	5,641
2021	5,641
2022	5,642
2023	5,662
2024	5,662
Thereafter	286,385
Total undiscounted cash flows (1)(2)(3)(4)(5)(6)	$	314,633
Present value discount	(216,233		)
Ground lease liabilities	$	98,400

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2019.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(5) One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every 10 years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2019 for the remainder of the lease term since we cannot predict future adjustments.

(6)

One of our ground lease obligations is subject to fixed 5% ground rent increases every five years, with the next increase occurring on December 1, 2022.

Schedule of minimum commitment under ground leases

The minimum commitment under our ground leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	5,154
2020	5,154
2021	5,154
2022	5,154
2023	5,154
Thereafter	233,619
Total (1)(2)(3)(4)(5)	$	259,389

________________________

(1) Excludes contingent future rent payments based on gross income or adjusted gross income and reflects the minimum ground lease obligations before the impact of ground lease extension options.

(2) One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of December 31, 2018.

(3) One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(4) One of our ground lease obligations is subject to a fair market value adjustment every five years based on a combination of CPI adjustments and third-party appraisals limited to maximum increases annually. The contractual obligations for that lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

(5)

One of our ground lease obligations includes a component which is based on the percentage of adjusted gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every ten years by an amount equal to 60% of the average annual percentage rent for the previous three years. The contractual obligations for this lease included above assume the current annual ground lease obligation in effect at December 31, 2018 for the remainder of the lease term since we cannot predict future adjustments.

XML

Stockholders' Equity of the Company (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of common stock sales under the at-the-market offering

The following table sets forth information regarding direct sales of our common stock under our at-the-market offering programs for the years ended December 31, 2018 and 2017:

	Year Ended December 31,
	2018		2017
	(in millions, except share data)
Shares of common stock sold during the period	1,817,195		235,077
Weighted average price per share of common stock	$	73.64	$	75.40
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

Schedule of accrued dividends and distributions

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock and noncontrolling units as of December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	51,418	$	45,840
Noncontrolling common unitholders of the Operating Partnership	981		922
RSU holders (1)	820		797
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	$	53,219	$	47,559

______________________

(1)

The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

Schedule of outstanding shares of common stock, preferred stock and noncontrolling units

	December 31,
	2019	2018
Outstanding Shares and Units:
Common stock (1)	106,016,287	100,746,988
Noncontrolling common units	2,023,287	2,025,287
RSUs (2)	1,651,905	1,711,628

______________________

(1) The amount includes nonvested shares.

(2)

The amount includes nonvested RSUs. Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

XML

Receivables (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Current receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Current receivables	$	27,660		$	24,815
Allowance for uncollectible tenant receivables (1)	(1,171		)	(4,639		)
Current receivables, net	$	26,489		$	20,176

Deferred rent receivables, net

Deferred rent receivables, net consisted of the following as of December 31, 2019 and 2018:

	December 31, 2019			December 31, 2018
	(in thousands)
Deferred rent receivables	$	339,489		$	270,346
Allowance for deferred rent receivables (1)	(1,552		)	(3,339		)
Deferred rent receivables, net	$	337,937		$	267,007

XML

Employee Benefit Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2007
Retirement Benefits [Abstract]
Eligibility period for 401K savings plan, period	3 months
401(k) plan, maximum participant deferral percent	60.00%
401(k) plan, employer match per dollar of participant contribution	$ 0.50
401(k) plan, maximum employer match percentage	10.00%
401(k) plan, contributions made	$ 1,600,000	$ 1,500,000	$ 1,300,000
Deferred Compensation, maximum participant deferral percent				70.00%
Deferred Compensation, maximum director fees and bonuses that may be deferred (percent)				100.00%
Deferred Compensation, mandatory Company contributions as percentage of gross monthly salary (percent)				10.00%
Deferred Compensation, liability under Plan	$ 27,000,000.0	$ 21,700,000

XML

Tax Treatment of Distributions

12 Months Ended

Dec. 31, 2019

Tax Treatment of Distributions [Abstract]

Tax Treatment of Distributions

Tax Treatment of Distributions

The following table reconciles the dividends declared per share of common stock to the dividends paid per share of common stock during the years ended December 31, 2019, 2018 and 2017 as follows: 

	Year Ended December 31,
Dividends	2019			2018			2017
Dividends declared per share of common stock	$	1.910		$	1.790		$	1.650
Less: Dividends declared in the current year and paid in the following year	(0.485		)	(0.455		)	(0.425		)
Add: Dividends declared in the prior year and paid in the current year (1)	0.455			0.425			2.275
Dividends paid per share of common stock	$	1.880		$	1.760		$	3.500

_________________

(1) The fourth quarter 2016 dividend of $2.275 per share of common stock consists of a special cash dividend of $1.90 per share of common stock and a regular quarterly cash dividend of $0.375 per share of common stock. The $1.90 per share special distribution is treated as paid in two tax years for income tax purposes: $1.587 is treated as paid on December 31, 2016 and $0.313 is treated as paid on January 13, 2017. The $0.375 per share regular quarterly distribution is considered a 2017 dividend distribution for income tax purposes.

The unaudited income tax treatment for the dividends to common stockholders reportable for the years ended December 31, 2019, 2018 and 2017 as identified in the table above was as follows: 

	Year Ended December 31,
Shares of Common Stock	2019				2018				2017
Ordinary income (1)	$	0.939	49.95	%	$	1.474	83.73	%	$	1.356	70.87	%
Qualified dividend	0.004		0.21		0.003		0.19		0.002		0.11
Return of capital	0.312		16.62		0.275		15.64		0.344		18.00
Capital gains (2)	0.600		31.93		0.008		0.44		—		—
Unrecaptured section 1250 gains	0.025		1.29		—		—		0.211		11.02
	$	1.880	100.00	%	$	1.760	100.00	%	$	1.913	100.00	%

_________________

(1) The Tax Cuts and Jobs Act enacted on December 22, 2017 generally allows a deduction for noncorporate taxpayers equal to 20% of ordinary dividends distributed by a REIT (excluding capital gain dividends and qualified dividend income). The amount of dividend eligible for this deduction is referred to as the Section 199A Dividend.  For the year ended December 31, 2019, the Section 199A Dividend is equal to the total ordinary income dividend.

(2)

Capital gains are comprised entirely of 20% rate gains.

XML

Share-Based and Other Compensation - Annual 2019, 2018 and 2017 and December 2018 Time-Based RSU Grants (Details) - USD ($) $ / shares in Units, $ in Millions							1 Months Ended	2 Months Ended
	Feb. 01, 2019	Dec. 27, 2018	Feb. 14, 2018	Jan. 29, 2018	Feb. 24, 2017	Feb. 03, 2017	Feb. 28, 2017	Feb. 28, 2018	Dec. 31, 2019
December 2018 Time-Based RSU Grant [Member] [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting criteria, one									50.00%
Vesting criteria, two									50.00%
Time-Based Restricted Stock Units (RSUs), 2019 Time-Based RSU Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value RSUs granted	$ 10.1
Fair value per share (in dollars per share)	$ 69.89
Time-Based Restricted Stock Units (RSUs), 2018 Special Time-Based RSU Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value RSUs granted		$ 18.5
Fair value per share (in dollars per share)		$ 62.00
Time-Based Restricted Stock Units (RSUs), 2018 Time-Based RSU Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value RSUs granted								$ 8.4
Fair value per share (in dollars per share)			$ 66.46	$ 70.37				$ 70.37
RSUs granted (in units)			67,818	56,015
Time-Based Restricted Stock Units (RSUs), 2017 Time-Based RSU Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value RSUs granted							$ 7.5
Fair value per share (in dollars per share)					$ 77.16	$ 73.30
RSUs granted (in units)					57,901	41,119

XML

Future Minimum Rent

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Future Minimum Rent

Future Minimum Rent

We have operating leases with tenants that expire at various dates through 2043 and are either subject to scheduled fixed increases or adjustments in rent based on the Consumer Price Index. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases as of December 31, 2019 for future periods is summarized as follows:

Year Ending	(in thousands)
2020	$	675,636
2021	728,736
2022	785,239
2023	769,294
2024	727,399
Thereafter	4,054,487
Total (1)	$	7,740,791

______________

(1) Excludes residential leases and leases with a term of one year or less.

Future contractual minimum rent under operating leases as of December 31, 2018 for future periods is summarized as follows:

Year Ending	(in thousands)
2019	$	566,783
2020	632,875
2021	631,835
2022	620,684
2023	586,371
Thereafter	3,240,143
Total (1)	$	6,278,691

______________

(1)

Excludes residential leases and leases with a term of one year or less.

XML

Net Income Available to Common Stockholders Per Share of the Company

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Net Income Available to Common Stockholders Per Share of the Company

Net Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net income available to common stockholders for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019			2018			2017
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	195,443		$	258,415		$	164,612
Total preferred dividends	—			—			(13,363		)
Allocation to participating securities (1)	(2,119		)	(2,004		)	(1,975		)
Numerator for basic and diluted net income available to common stockholders	$	193,324		$	256,411		$	149,274
Denominator:
Basic weighted average vested shares outstanding	103,200,568			99,972,359			98,113,561
Effect of dilutive securities	648,600			510,006			613,770
Diluted weighted average vested shares and common stock equivalents outstanding	103,849,168			100,482,365			98,727,331
Basic earnings per share:
Net income available to common stockholders per share	$	1.87		$	2.56		$	1.52
Diluted earnings per share:
Net income available to common stockholders per share	$	1.86		$	2.55		$	1.51

________________________ 

(1) Participating securities include nonvested shares, certain time-based RSUs and vested market measure-based RSUs.

Share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are considered participating securities. The impact of potentially dilutive common shares, including stock options, RSUs, shares issuable under executed forward equity sale agreements and other securities are considered in our diluted earnings per share calculation for the years ended December 31, 2019, 2018, and 2017. Certain market measure-based RSUs are not included in dilutive securities as of December 31, 2019, 2018, and 2017 as not all performance metrics had been met by the end of the applicable reporting periods.

See Note 15 “Share-Based Compensation” for additional information regarding the stock options and other share-based compensation.

XML

Share-Based and Other Compensation - Time-Based RSUs (Details) - Time-Based Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)	(182,219)	(214,131)	(228,095)
Nonvested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	153,005	437,216	142,101
Fair value per share on valuation date (in dollars per share)	$ 70.31	$ 64.21	$ 74.91
Vested (in shares)	(153,464)
Vested Restricted Stock Units RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0
Vested (in shares)	(153,464)
Total Fair Value at Vest Date	$ 12,277	$ 14,768	$ 16,735

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES (Note 2):
Revenues	$ 837,454	$ 747,298	$ 719,001
EXPENSES:
Real estate taxes (Note 2)	78,097	70,820	66,449
Provision for bad debts (Notes 2 and 20)	0	5,685	3,269
Ground leases (Notes 2, 5 and 18)	8,113
Ground leases (Notes 2, 5 and 18)		6,176	6,337
General and administrative expenses (Note 15)	88,139	90,471	60,581
Leasing costs (Notes 2 and 5)	7,615
Depreciation and amortization (Notes 2 and 5)	273,130	254,281	245,886
Total expenses	615,131	561,220	512,493
OTHER (EXPENSES) INCOME:
Interest income and other net investment gain (loss) (Note 19)	4,641	(559)	5,503
Interest expense (Note 9)	(48,537)	(49,721)	(66,040)
Loss on early extinguishment of debt (Note 9)	0	(12,623)	(5,312)
Net gain on sales of land (Note 4)	0	11,825	449
Gains on sales of depreciable operating properties (Note 4)	36,802	142,926	39,507
Total other (expenses) income	(7,094)	91,848	(25,893)
NET INCOME	215,229	277,926	180,615
Net income attributable to noncontrolling common units of the Operating Partnership (Notes 2 and 11)	(3,766)	(5,193)	(3,223)
Net income attributable to noncontrolling interests in consolidated property partnerships (Notes 2 and 11)	(16,020)	(14,318)	(12,780)
Total income attributable to noncontrolling interests	(19,786)	(19,511)	(16,003)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION / KILROY REALTY, L.P.	195,443	258,415	164,612
Preferred dividends (Note 13)	0	0	(5,774)
Original issuance costs of redeemed preferred stock and preferred units (Note 13)	0	0	(7,589)
Total preferred dividends	0	0	(13,363)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 195,443	$ 258,415	$ 151,249
Net income available to common stockholders per share - basic (in dollars per share)	$ 1.87	$ 2.56	$ 1.52
Net income available to common stockholders per share - diluted (in dollars per share)	$ 1.86	$ 2.55	$ 1.51
Weighted average shares of common stock outstanding – basic (in shares)	103,200,568	99,972,359	98,113,561
Weighted average shares of common stock outstanding – diluted (in shares)	103,849,168	100,482,365	98,727,331
Rental income [Member]
REVENUES (Note 2):
Revenues	$ 826,472	$ 656,631	$ 633,896
Tenant reimbursements [Member]
REVENUES (Note 2):
Revenues	0	80,982	76,559
Other property income [Member]
REVENUES (Note 2):
Revenues	10,982	9,685	8,546
Property [Member]
EXPENSES:
Property expenses (Note 2)	$ 160,037	$ 133,787	$ 129,971

XML

Schedule III - Real Estate and Accumulated Depreciation - Schedule of Real Estate and Accumulated Depreciation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 21, 2018 ft²	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 259,502
Initial cost, land and improvements	2,472,173
Initial cost, buildings and Improvements	2,717,671
Costs capitalized subsequent to acquisition/ improvement	4,438,929
Land and improvements, gross	2,524,342
Buildings and improvements, gross	7,104,432
Land and improvements and buildings and improvements, gross	9,628,773
Accumulated depreciation	$ 1,561,361	$ 1,391,368		$ 1,264,162	$ 1,139,853
Rentable square feet | ft²	13,475,795
345 Brannan Street, San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet | ft²			110,050
Office Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 259,502
Initial cost, land and improvements	1,413,997
Initial cost, buildings and Improvements	2,717,671
Costs capitalized subsequent to acquisition/ improvement	3,200,975
Land and improvements, gross	1,466,166
Buildings and improvements, gross	5,866,477
Land and improvements and buildings and improvements, gross	7,332,643
Accumulated depreciation	$ 1,561,361
Rentable square feet | ft²	13,475,795
Office Building [Member] | 3077-3243 S. La Cienega Blvd., Culver City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 150,718
Initial cost, buildings and Improvements	31,032
Costs capitalized subsequent to acquisition/ improvement	2
Land and improvements, gross	150,718
Buildings and improvements, gross	31,034
Land and improvements and buildings and improvements, gross	181,752
Accumulated depreciation	$ 1,227
Depreciation life	35 years
Rentable square feet | ft²	151,908
Office Building [Member] | 2240 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,044
Initial cost, buildings and Improvements	11,763
Costs capitalized subsequent to acquisition/ improvement	29,542
Land and improvements, gross	1,048
Buildings and improvements, gross	41,301
Land and improvements and buildings and improvements, gross	42,349
Accumulated depreciation	$ 26,943
Depreciation life	35 years
Rentable square feet | ft²	122,870
Office Building [Member] | 2250 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,579
Initial cost, buildings and Improvements	29,062
Costs capitalized subsequent to acquisition/ improvement	36,294
Land and improvements, gross	2,547
Buildings and improvements, gross	65,388
Land and improvements and buildings and improvements, gross	67,935
Accumulated depreciation	$ 54,789
Depreciation life	35 years
Rentable square feet | ft²	298,728
Office Building [Member] | 2260 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,518
Initial cost, buildings and Improvements	28,370
Costs capitalized subsequent to acquisition/ improvement	36,764
Land and improvements, gross	2,547
Buildings and improvements, gross	65,105
Land and improvements and buildings and improvements, gross	67,652
Accumulated depreciation	$ 16,320
Depreciation life	35 years
Rentable square feet | ft²	298,728
Office Building [Member] | 909 N. Pacific Coast Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,577
Initial cost, buildings and Improvements	34,042
Costs capitalized subsequent to acquisition/ improvement	50,104
Land and improvements, gross	3,577
Buildings and improvements, gross	84,146
Land and improvements and buildings and improvements, gross	87,723
Accumulated depreciation	$ 41,765
Depreciation life	35 years
Rentable square feet | ft²	244,136
Office Building [Member] | 999 N. Pacific Coast Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,407
Initial cost, buildings and Improvements	34,326
Costs capitalized subsequent to acquisition/ improvement	16,897
Land and improvements, gross	1,407
Buildings and improvements, gross	51,223
Land and improvements and buildings and improvements, gross	52,630
Accumulated depreciation	$ 25,350
Depreciation life	35 years
Rentable square feet | ft²	128,588
Office Building [Member] | 6115 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,313
Initial cost, buildings and Improvements	3
Costs capitalized subsequent to acquisition/ improvement	16,436
Land and improvements, gross	2,455
Buildings and improvements, gross	15,297
Land and improvements and buildings and improvements, gross	17,752
Accumulated depreciation	$ 2,165
Depreciation life	35 years
Rentable square feet | ft²	26,105
Office Building [Member] | 6121 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 11,120
Initial cost, buildings and Improvements	4,256
Costs capitalized subsequent to acquisition/ improvement	43,971
Land and improvements, gross	8,703
Buildings and improvements, gross	50,644
Land and improvements and buildings and improvements, gross	59,347
Accumulated depreciation	$ 7,262
Depreciation life	35 years
Rentable square feet | ft²	91,173
Office Building [Member] | 1525 N. Gower Street, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,318
Initial cost, buildings and Improvements	3
Costs capitalized subsequent to acquisition/ improvement	9,641
Land and improvements, gross	1,318
Buildings and improvements, gross	9,644
Land and improvements and buildings and improvements, gross	10,962
Accumulated depreciation	$ 1,206
Depreciation life	35 years
Rentable square feet | ft²	9,610
Office Building [Member] | 1575 N. Gower Street, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,153
Initial cost, buildings and Improvements	51
Costs capitalized subsequent to acquisition/ improvement	119,460
Land and improvements, gross	22,153
Buildings and improvements, gross	119,511
Land and improvements and buildings and improvements, gross	141,664
Accumulated depreciation	$ 11,813
Depreciation life	35 years
Rentable square feet | ft²	251,245
Office Building [Member] | 1500 N. El Centro Avenue, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,235
Initial cost, buildings and Improvements	21
Costs capitalized subsequent to acquisition/ improvement	58,603
Land and improvements, gross	9,235
Buildings and improvements, gross	58,624
Land and improvements and buildings and improvements, gross	67,859
Accumulated depreciation	$ 6,208
Depreciation life	35 years
Rentable square feet | ft²	104,504
Office Building [Member] | 1550 N. El Centro Avenue, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 16,970
Initial cost, buildings and Improvements	39
Costs capitalized subsequent to acquisition/ improvement	135,847
Land and improvements, gross	16,970
Buildings and improvements, gross	135,886
Land and improvements and buildings and improvements, gross	152,856
Accumulated depreciation	$ 13,895
Depreciation life	35 years
Rentable square feet | ft²	0
Office Building [Member] | 6255 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,111
Initial cost, buildings and Improvements	60,320
Costs capitalized subsequent to acquisition/ improvement	46,112
Land and improvements, gross	18,111
Buildings and improvements, gross	106,432
Land and improvements and buildings and improvements, gross	124,543
Accumulated depreciation	$ 35,548
Depreciation life	35 years
Rentable square feet | ft²	323,920
Office Building [Member] | 3750 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	1,941
Costs capitalized subsequent to acquisition/ improvement	11,610
Land and improvements, gross	0
Buildings and improvements, gross	13,551
Land and improvements and buildings and improvements, gross	13,551
Accumulated depreciation	$ 10,822
Depreciation life	35 years
Rentable square feet | ft²	10,457
Office Building [Member] | 3760 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	17,467
Costs capitalized subsequent to acquisition/ improvement	14,902
Land and improvements, gross	0
Buildings and improvements, gross	32,369
Land and improvements and buildings and improvements, gross	32,369
Accumulated depreciation	$ 26,878
Depreciation life	35 years
Rentable square feet | ft²	165,278
Office Building [Member] | 3780 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	22,319
Costs capitalized subsequent to acquisition/ improvement	26,442
Land and improvements, gross	0
Buildings and improvements, gross	48,761
Land and improvements and buildings and improvements, gross	48,761
Accumulated depreciation	$ 39,320
Depreciation life	35 years
Rentable square feet | ft²	221,452
Office Building [Member] | 3800 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	19,408
Costs capitalized subsequent to acquisition/ improvement	21,806
Land and improvements, gross	0
Buildings and improvements, gross	41,214
Land and improvements and buildings and improvements, gross	41,214
Accumulated depreciation	$ 24,877
Depreciation life	35 years
Rentable square feet | ft²	192,476
Office Building [Member] | 3840 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	13,586
Costs capitalized subsequent to acquisition/ improvement	10,666
Land and improvements, gross	0
Buildings and improvements, gross	24,252
Land and improvements and buildings and improvements, gross	24,252
Accumulated depreciation	$ 16,162
Depreciation life	35 years
Rentable square feet | ft²	136,026
Office Building [Member] | 3880 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	9,704
Costs capitalized subsequent to acquisition/ improvement	11,463
Land and improvements, gross	0
Buildings and improvements, gross	21,167
Land and improvements and buildings and improvements, gross	21,167
Accumulated depreciation	$ 4,517
Depreciation life	35 years
Rentable square feet | ft²	96,035
Office Building [Member] | 3900 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	12,615
Costs capitalized subsequent to acquisition/ improvement	12,433
Land and improvements, gross	0
Buildings and improvements, gross	25,048
Land and improvements and buildings and improvements, gross	25,048
Accumulated depreciation	$ 18,248
Depreciation life	35 years
Rentable square feet | ft²	129,893
Office Building [Member] | Kilroy Airport Center, Phase IV, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	4,997
Land and improvements, gross	0
Buildings and improvements, gross	4,997
Land and improvements and buildings and improvements, gross	4,997
Accumulated depreciation	$ 4,997
Depreciation life	35 years
Rentable square feet | ft²	0
Office Building [Member] | 8560 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,720
Initial cost, buildings and Improvements	50,956
Costs capitalized subsequent to acquisition/ improvement	1,587
Land and improvements, gross	9,720
Buildings and improvements, gross	52,543
Land and improvements and buildings and improvements, gross	62,263
Accumulated depreciation	$ 6,289
Depreciation life	35 years
Rentable square feet | ft²	71,875
Office Building [Member] | 8570 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 31,693
Initial cost, buildings and Improvements	27,974
Costs capitalized subsequent to acquisition/ improvement	4,589
Land and improvements, gross	31,693
Buildings and improvements, gross	32,563
Land and improvements and buildings and improvements, gross	64,256
Accumulated depreciation	$ 3,090
Depreciation life	35 years
Rentable square feet | ft²	43,603
Office Building [Member] | 8580 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,013
Initial cost, buildings and Improvements	3,695
Costs capitalized subsequent to acquisition/ improvement	648
Land and improvements, gross	10,013
Buildings and improvements, gross	4,343
Land and improvements and buildings and improvements, gross	14,356
Accumulated depreciation	$ 392
Depreciation life	35 years
Rentable square feet | ft²	7,126
Office Building [Member] | 8590 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 39,954
Initial cost, buildings and Improvements	27,884
Costs capitalized subsequent to acquisition/ improvement	5,192
Land and improvements, gross	39,954
Buildings and improvements, gross	33,076
Land and improvements and buildings and improvements, gross	73,030
Accumulated depreciation	$ 3,370
Depreciation life	35 years
Rentable square feet | ft²	56,095
Office Building [Member] | 12100 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 170,000
Initial cost, land and improvements	352
Initial cost, buildings and Improvements	45,611
Costs capitalized subsequent to acquisition/ improvement	18,617
Land and improvements, gross	9,633
Buildings and improvements, gross	54,947
Land and improvements and buildings and improvements, gross	64,580
Accumulated depreciation	$ 29,197
Depreciation life	35 years
Rentable square feet | ft²	152,048
Office Building [Member] | 12200 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,329
Initial cost, buildings and Improvements	35,488
Costs capitalized subsequent to acquisition/ improvement	24,224
Land and improvements, gross	3,977
Buildings and improvements, gross	60,064
Land and improvements and buildings and improvements, gross	64,041
Accumulated depreciation	$ 39,654
Depreciation life	35 years
Rentable square feet | ft²	150,832
Office Building [Member] | 12233 Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,100
Initial cost, buildings and Improvements	53,170
Costs capitalized subsequent to acquisition/ improvement	4,676
Land and improvements, gross	22,100
Buildings and improvements, gross	57,846
Land and improvements and buildings and improvements, gross	79,946
Accumulated depreciation	$ 14,055
Depreciation life	35 years
Rentable square feet | ft²	151,029
Office Building [Member] | 12312 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,325
Initial cost, buildings and Improvements	12,202
Costs capitalized subsequent to acquisition/ improvement	12,346
Land and improvements, gross	3,399
Buildings and improvements, gross	24,474
Land and improvements and buildings and improvements, gross	27,873
Accumulated depreciation	$ 13,463
Depreciation life	35 years
Rentable square feet | ft²	76,644
Office Building [Member] | 1633 26th St., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,080
Initial cost, buildings and Improvements	6,672
Costs capitalized subsequent to acquisition/ improvement	3,581
Land and improvements, gross	2,040
Buildings and improvements, gross	10,293
Land and improvements and buildings and improvements, gross	12,333
Accumulated depreciation	$ 7,177
Depreciation life	35 years
Rentable square feet | ft²	43,857
Office Building [Member] | 2100/2110 Colorado Ave., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,474
Initial cost, buildings and Improvements	26,087
Costs capitalized subsequent to acquisition/ improvement	14,678
Land and improvements, gross	5,476
Buildings and improvements, gross	40,763
Land and improvements and buildings and improvements, gross	46,239
Accumulated depreciation	$ 25,730
Depreciation life	35 years
Rentable square feet | ft²	102,864
Office Building [Member] | 3130 Wilshire Blvd., Santa Monica, [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 8,921
Initial cost, buildings and Improvements	6,579
Costs capitalized subsequent to acquisition/ improvement	16,799
Land and improvements, gross	9,188
Buildings and improvements, gross	23,111
Land and improvements and buildings and improvements, gross	32,299
Accumulated depreciation	$ 15,989
Depreciation life	35 years
Rentable square feet | ft²	90,074
Office Building [Member] | 501 Santa Monica Blvd., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,547
Initial cost, buildings and Improvements	12,044
Costs capitalized subsequent to acquisition/ improvement	15,889
Land and improvements, gross	4,551
Buildings and improvements, gross	27,929
Land and improvements and buildings and improvements, gross	32,480
Accumulated depreciation	$ 17,346
Depreciation life	35 years
Rentable square feet | ft²	76,803
Office Building [Member] | 12225 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,700
Initial cost, buildings and Improvements	9,633
Costs capitalized subsequent to acquisition/ improvement	3,714
Land and improvements, gross	1,673
Buildings and improvements, gross	13,374
Land and improvements and buildings and improvements, gross	15,047
Accumulated depreciation	$ 9,224
Depreciation life	35 years
Rentable square feet | ft²	58,401
Office Building [Member] | 12235 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,507
Initial cost, buildings and Improvements	8,543
Costs capitalized subsequent to acquisition/ improvement	9,022
Land and improvements, gross	1,540
Buildings and improvements, gross	17,532
Land and improvements and buildings and improvements, gross	19,072
Accumulated depreciation	$ 10,435
Depreciation life	35 years
Rentable square feet | ft²	53,751
Office Building [Member] | 12340 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,201
Initial cost, buildings and Improvements	13,896
Costs capitalized subsequent to acquisition/ improvement	11,660
Land and improvements, gross	4,201
Buildings and improvements, gross	25,556
Land and improvements and buildings and improvements, gross	29,757
Accumulated depreciation	$ 12,128
Depreciation life	35 years
Rentable square feet | ft²	89,272
Office Building [Member] | 12390 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,453
Initial cost, buildings and Improvements	11,981
Costs capitalized subsequent to acquisition/ improvement	8,804
Land and improvements, gross	3,453
Buildings and improvements, gross	20,785
Land and improvements and buildings and improvements, gross	24,238
Accumulated depreciation	$ 9,540
Depreciation life	35 years
Rentable square feet | ft²	70,140
Office Building [Member] | 12348 High Bluff Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,629
Initial cost, buildings and Improvements	3,096
Costs capitalized subsequent to acquisition/ improvement	6,323
Land and improvements, gross	1,629
Buildings and improvements, gross	9,419
Land and improvements and buildings and improvements, gross	11,048
Accumulated depreciation	$ 6,636
Depreciation life	35 years
Rentable square feet | ft²	38,806
Office Building [Member] | 12400 High Bluff Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 15,167
Initial cost, buildings and Improvements	40,497
Costs capitalized subsequent to acquisition/ improvement	14,473
Land and improvements, gross	15,167
Buildings and improvements, gross	54,970
Land and improvements and buildings and improvements, gross	70,137
Accumulated depreciation	$ 28,866
Depreciation life	35 years
Rentable square feet | ft²	209,220
Office Building [Member] | 3579 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,167
Initial cost, buildings and Improvements	6,897
Costs capitalized subsequent to acquisition/ improvement	7,628
Land and improvements, gross	2,858
Buildings and improvements, gross	13,834
Land and improvements and buildings and improvements, gross	16,692
Accumulated depreciation	$ 10,015
Depreciation life	35 years
Rentable square feet | ft²	54,960
Office Building [Member] | 3611 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,184
Initial cost, buildings and Improvements	19,352
Costs capitalized subsequent to acquisition/ improvement	19,881
Land and improvements, gross	5,259
Buildings and improvements, gross	38,158
Land and improvements and buildings and improvements, gross	43,417
Accumulated depreciation	$ 25,713
Depreciation life	35 years
Rentable square feet | ft²	129,656
Office Building [Member] | 3661 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,038
Initial cost, buildings and Improvements	21,144
Costs capitalized subsequent to acquisition/ improvement	18,843
Land and improvements, gross	4,725
Buildings and improvements, gross	39,300
Land and improvements and buildings and improvements, gross	44,025
Accumulated depreciation	$ 22,291
Depreciation life	35 years
Rentable square feet | ft²	128,364
Office Building [Member] | 3721 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,297
Initial cost, buildings and Improvements	18,967
Costs capitalized subsequent to acquisition/ improvement	14,705
Land and improvements, gross	4,254
Buildings and improvements, gross	33,715
Land and improvements and buildings and improvements, gross	37,969
Accumulated depreciation	$ 17,509
Depreciation life	35 years
Rentable square feet | ft²	115,193
Office Building [Member] | 3811 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,452
Initial cost, buildings and Improvements	16,152
Costs capitalized subsequent to acquisition/ improvement	20,234
Land and improvements, gross	4,457
Buildings and improvements, gross	35,381
Land and improvements and buildings and improvements, gross	39,838
Accumulated depreciation	$ 22,848
Depreciation life	35 years
Rentable square feet | ft²	112,067
Office Building [Member] | 12770 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,360
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	33,708
Land and improvements, gross	9,360
Buildings and improvements, gross	33,708
Land and improvements and buildings and improvements, gross	43,068
Accumulated depreciation	$ 3,281
Depreciation life	35 years
Rentable square feet | ft²	73,032
Office Building [Member] | 12780 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,398
Initial cost, buildings and Improvements	54,954
Costs capitalized subsequent to acquisition/ improvement	19,637
Land and improvements, gross	18,398
Buildings and improvements, gross	74,591
Land and improvements and buildings and improvements, gross	92,989
Accumulated depreciation	$ 15,891
Depreciation life	35 years
Rentable square feet | ft²	140,591
Office Building [Member] | 12790 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,252
Initial cost, buildings and Improvements	21,236
Costs capitalized subsequent to acquisition/ improvement	1,915
Land and improvements, gross	10,252
Buildings and improvements, gross	23,151
Land and improvements and buildings and improvements, gross	33,403
Accumulated depreciation	$ 5,768
Depreciation life	35 years
Rentable square feet | ft²	78,836
Office Building [Member] | 3745 Paseo Place, Del Mar, CA (Retail) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 24,358
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	71,800
Land and improvements, gross	24,358
Buildings and improvements, gross	71,800
Land and improvements and buildings and improvements, gross	96,158
Accumulated depreciation	$ 1,683
Depreciation life	35 years
Rentable square feet | ft²	0
Office Building [Member] | 3200 Paseo Village Way, San Diego, CA (Resi Phase I) (16) [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 40,186
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	102,749
Land and improvements, gross	40,186
Buildings and improvements, gross	102,749
Land and improvements and buildings and improvements, gross	142,935
Accumulated depreciation	$ 937
Depreciation life	35 years
Rentable square feet | ft²	0
Office Building [Member] | 13280 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,701
Initial cost, buildings and Improvements	8,398
Costs capitalized subsequent to acquisition/ improvement	4,729
Land and improvements, gross	3,701
Buildings and improvements, gross	13,127
Land and improvements and buildings and improvements, gross	16,828
Accumulated depreciation	$ 5,809
Depreciation life	35 years
Rentable square feet | ft²	41,196
Office Building [Member] | 13290 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,229
Initial cost, buildings and Improvements	11,871
Costs capitalized subsequent to acquisition/ improvement	6,128
Land and improvements, gross	5,229
Buildings and improvements, gross	17,999
Land and improvements and buildings and improvements, gross	23,228
Accumulated depreciation	$ 6,797
Depreciation life	35 years
Rentable square feet | ft²	61,180
Office Building [Member] | 13480 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,997
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	52,826
Land and improvements, gross	7,997
Buildings and improvements, gross	52,826
Land and improvements and buildings and improvements, gross	60,823
Accumulated depreciation	$ 20,167
Depreciation life	35 years
Rentable square feet | ft²	154,157
Office Building [Member] | 13500 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,581
Initial cost, buildings and Improvements	35,903
Costs capitalized subsequent to acquisition/ improvement	18,106
Land and improvements, gross	7,581
Buildings and improvements, gross	54,009
Land and improvements and buildings and improvements, gross	61,590
Accumulated depreciation	$ 22,402
Depreciation life	35 years
Rentable square feet | ft²	137,658
Office Building [Member] | 13520 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,580
Initial cost, buildings and Improvements	35,903
Costs capitalized subsequent to acquisition/ improvement	17,778
Land and improvements, gross	7,580
Buildings and improvements, gross	53,681
Land and improvements and buildings and improvements, gross	61,261
Accumulated depreciation	$ 24,885
Depreciation life	35 years
Rentable square feet | ft²	146,701
Office Building [Member] | 2305 Historic Decatur Rd., Point Loma, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,240
Initial cost, buildings and Improvements	22,220
Costs capitalized subsequent to acquisition/ improvement	7,309
Land and improvements, gross	5,240
Buildings and improvements, gross	29,529
Land and improvements and buildings and improvements, gross	34,769
Accumulated depreciation	$ 10,801
Depreciation life	35 years
Rentable square feet | ft²	107,456
Office Building [Member] | 4690 Executive Dr., University Towne Centre, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,623
Initial cost, buildings and Improvements	7,926
Costs capitalized subsequent to acquisition/ improvement	3,722
Land and improvements, gross	1,623
Buildings and improvements, gross	11,648
Land and improvements and buildings and improvements, gross	13,271
Accumulated depreciation	$ 7,829
Depreciation life	35 years
Rentable square feet | ft²	47,846
Office Building [Member] | Bohannon Drive 4100, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,835
Initial cost, buildings and Improvements	15,526
Costs capitalized subsequent to acquisition/ improvement	567
Land and improvements, gross	4,860
Buildings and improvements, gross	16,068
Land and improvements and buildings and improvements, gross	20,928
Accumulated depreciation	$ 4,557
Depreciation life	35 years
Rentable square feet | ft²	47,379
Office Building [Member] | Bohannon Drive 4200, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	3,703
Land and improvements, gross	4,662
Buildings and improvements, gross	19,245
Land and improvements and buildings and improvements, gross	23,907
Accumulated depreciation	$ 5,788
Depreciation life	35 years
Rentable square feet | ft²	45,451
Office Building [Member] | Bohannon Drive 4300, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,958
Costs capitalized subsequent to acquisition/ improvement	3,248
Land and improvements, gross	6,470
Buildings and improvements, gross	24,263
Land and improvements and buildings and improvements, gross	30,733
Accumulated depreciation	$ 7,803
Depreciation life	35 years
Rentable square feet | ft²	63,079
Office Building [Member] | Bohannon Drive 4400, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	2,905
Land and improvements, gross	4,939
Buildings and improvements, gross	18,170
Land and improvements and buildings and improvements, gross	23,109
Accumulated depreciation	$ 5,779
Depreciation life	35 years
Rentable square feet | ft²	48,146
Office Building [Member] | Bohannon Drive 4500, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,957
Costs capitalized subsequent to acquisition/ improvement	3,422
Land and improvements, gross	6,470
Buildings and improvements, gross	24,436
Land and improvements and buildings and improvements, gross	30,906
Accumulated depreciation	$ 6,552
Depreciation life	35 years
Rentable square feet | ft²	63,078
Office Building [Member] | Bohannon Drive 4600, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	3,571
Land and improvements, gross	4,939
Buildings and improvements, gross	18,836
Land and improvements and buildings and improvements, gross	23,775
Accumulated depreciation	$ 5,660
Depreciation life	35 years
Rentable square feet | ft²	48,147
Office Building [Member] | Bohannon Drive 4700, Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,958
Costs capitalized subsequent to acquisition/ improvement	1,488
Land and improvements, gross	6,470
Buildings and improvements, gross	22,503
Land and improvements and buildings and improvements, gross	28,973
Accumulated depreciation	$ 6,326
Depreciation life	35 years
Rentable square feet | ft²	63,078
Office Building [Member] | 1290-1300 Terra Bella Avenue, Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 28,730
Initial cost, buildings and Improvements	27,555
Costs capitalized subsequent to acquisition/ improvement	61
Land and improvements, gross	28,730
Buildings and improvements, gross	27,616
Land and improvements and buildings and improvements, gross	56,346
Accumulated depreciation	$ 4,809
Depreciation life	35 years
Rentable square feet | ft²	114,175
Office Building [Member] | 331 Fairchild Dr., Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,396
Initial cost, buildings and Improvements	17,712
Costs capitalized subsequent to acquisition/ improvement	7,962
Land and improvements, gross	18,396
Buildings and improvements, gross	25,674
Land and improvements and buildings and improvements, gross	44,070
Accumulated depreciation	$ 5,575
Depreciation life	35 years
Rentable square feet | ft²	87,147
Office Building [Member] | 680 E Middlefield Road, Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 34,605
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	56,470
Land and improvements, gross	34,605
Buildings and improvements, gross	56,470
Land and improvements and buildings and improvements, gross	91,075
Accumulated depreciation	$ 9,813
Depreciation life	35 years
Rentable square feet | ft²	170,090
Office Building [Member] | 690 E Middlefield Road, Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 34,755
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	56,713
Land and improvements, gross	34,755
Buildings and improvements, gross	56,713
Land and improvements and buildings and improvements, gross	91,468
Accumulated depreciation	$ 9,855
Depreciation life	35 years
Rentable square feet | ft²	170,823
Office Building [Member] | 1701 Page Mill Rd, Palo Alto, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	99,522
Costs capitalized subsequent to acquisition/ improvement	30
Land and improvements, gross	0
Buildings and improvements, gross	99,552
Land and improvements and buildings and improvements, gross	99,552
Accumulated depreciation	$ 9,002
Depreciation life	35 years
Rentable square feet | ft²	128,688
Office Building [Member] | 3150 Porter Drive, Palo Alto, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	21,715
Costs capitalized subsequent to acquisition/ improvement	4
Land and improvements, gross	0
Buildings and improvements, gross	21,719
Land and improvements and buildings and improvements, gross	21,719
Accumulated depreciation	$ 2,387
Depreciation life	35 years
Rentable square feet | ft²	36,897
Office Building [Member] | 900 Jefferson Ave., Redwood City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 16,668
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	109,375
Land and improvements, gross	18,063
Buildings and improvements, gross	107,980
Land and improvements and buildings and improvements, gross	126,043
Accumulated depreciation	$ 15,824
Depreciation life	35 years
Rentable square feet | ft²	228,505
Office Building [Member] | 900 Middlefield Road, Redwood City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,959
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	50,114
Land and improvements, gross	8,626
Buildings and improvements, gross	49,447
Land and improvements and buildings and improvements, gross	58,073
Accumulated depreciation	$ 6,941
Depreciation life	35 years
Rentable square feet | ft²	118,764
Office Building [Member] | 303 Second St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 63,550
Initial cost, buildings and Improvements	154,153
Costs capitalized subsequent to acquisition/ improvement	84,572
Land and improvements, gross	63,550
Buildings and improvements, gross	238,725
Land and improvements and buildings and improvements, gross	302,275
Accumulated depreciation	$ 83,973
Depreciation life	35 years
Rentable square feet | ft²	784,658
Office Building [Member] | 100 First St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 49,150
Initial cost, buildings and Improvements	131,238
Costs capitalized subsequent to acquisition/ improvement	64,883
Land and improvements, gross	49,150
Buildings and improvements, gross	196,121
Land and improvements and buildings and improvements, gross	245,271
Accumulated depreciation	$ 62,989
Depreciation life	35 years
Rentable square feet | ft²	467,095
Office Building [Member] | 250 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,630
Initial cost, buildings and Improvements	22,770
Costs capitalized subsequent to acquisition/ improvement	9,932
Land and improvements, gross	7,630
Buildings and improvements, gross	32,702
Land and improvements and buildings and improvements, gross	40,332
Accumulated depreciation	$ 10,651
Depreciation life	35 years
Rentable square feet | ft²	100,850
Office Building [Member] | 201 Third St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 19,260
Initial cost, buildings and Improvements	84,018
Costs capitalized subsequent to acquisition/ improvement	66,962
Land and improvements, gross	19,260
Buildings and improvements, gross	150,980
Land and improvements and buildings and improvements, gross	170,240
Accumulated depreciation	$ 55,837
Depreciation life	35 years
Rentable square feet | ft²	346,538
Office Building [Member] | 301 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,910
Initial cost, buildings and Improvements	22,450
Costs capitalized subsequent to acquisition/ improvement	8,174
Land and improvements, gross	5,910
Buildings and improvements, gross	30,624
Land and improvements and buildings and improvements, gross	36,534
Accumulated depreciation	$ 10,091
Depreciation life	35 years
Rentable square feet | ft²	82,834
Office Building [Member] | 360 Third St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	88,235
Costs capitalized subsequent to acquisition/ improvement	121,323
Land and improvements, gross	28,504
Buildings and improvements, gross	181,054
Land and improvements and buildings and improvements, gross	209,558
Accumulated depreciation	$ 46,907
Depreciation life	35 years
Rentable square feet | ft²	429,796
Office Building [Member] | 333 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,645
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	81,016
Land and improvements, gross	18,645
Buildings and improvements, gross	81,016
Land and improvements and buildings and improvements, gross	99,661
Accumulated depreciation	$ 8,826
Depreciation life	35 years
Rentable square feet | ft²	185,602
Office Building [Member] | 350 Mission St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 52,815
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	213,450
Land and improvements, gross	52,815
Buildings and improvements, gross	213,450
Land and improvements and buildings and improvements, gross	266,265
Accumulated depreciation	$ 24,500
Depreciation life	35 years
Rentable square feet | ft²	455,340
Office Building [Member] | 100 Hooper Street, San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 78,564
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	196,251
Land and improvements, gross	88,510
Buildings and improvements, gross	186,305
Land and improvements and buildings and improvements, gross	274,815
Accumulated depreciation	$ 5,978
Depreciation life	35 years
Rentable square feet | ft²	394,340
Office Building [Member] | 345 Brannan Street, San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 29,405
Initial cost, buildings and Improvements	113,179
Costs capitalized subsequent to acquisition/ improvement	1,322
Land and improvements, gross	29,403
Buildings and improvements, gross	114,503
Land and improvements and buildings and improvements, gross	143,906
Accumulated depreciation	$ 3,697
Depreciation life	35 years
Rentable square feet | ft²	110,050
Office Building [Member] | 345 Oyster Point Blvd., South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 13,745
Initial cost, buildings and Improvements	18,575
Costs capitalized subsequent to acquisition/ improvement	1
Land and improvements, gross	13,745
Buildings and improvements, gross	18,576
Land and improvements and buildings and improvements, gross	32,321
Accumulated depreciation	$ 1,167
Depreciation life	35 years
Rentable square feet | ft²	40,410
Office Building [Member] | 347 Oyster Point Blvd., South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 14,071
Initial cost, buildings and Improvements	18,289
Costs capitalized subsequent to acquisition/ improvement	44
Land and improvements, gross	14,071
Buildings and improvements, gross	18,333
Land and improvements and buildings and improvements, gross	32,404
Accumulated depreciation	$ 1,150
Depreciation life	35 years
Rentable square feet | ft²	39,780
Office Building [Member] | 349 Oyster Point Blvd., South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 23,112
Initial cost, buildings and Improvements	22,601
Costs capitalized subsequent to acquisition/ improvement	324
Land and improvements, gross	23,112
Buildings and improvements, gross	22,925
Land and improvements and buildings and improvements, gross	46,037
Accumulated depreciation	$ 1,926
Depreciation life	35 years
Rentable square feet | ft²	65,340
Office Building [Member] | 505 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 37,843
Initial cost, buildings and Improvements	1,163
Costs capitalized subsequent to acquisition/ improvement	50,450
Land and improvements, gross	37,943
Buildings and improvements, gross	51,513
Land and improvements and buildings and improvements, gross	89,456
Accumulated depreciation	$ 7,827
Depreciation life	35 years
Rentable square feet | ft²	212,322
Office Building [Member] | 555 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 37,843
Initial cost, buildings and Improvements	1,163
Costs capitalized subsequent to acquisition/ improvement	50,447
Land and improvements, gross	37,943
Buildings and improvements, gross	51,510
Land and improvements and buildings and improvements, gross	89,453
Accumulated depreciation	$ 7,827
Depreciation life	35 years
Rentable square feet | ft²	212,322
Office Building [Member] | 605 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 29,014
Initial cost, buildings and Improvements	891
Costs capitalized subsequent to acquisition/ improvement	77,281
Land and improvements, gross	29,090
Buildings and improvements, gross	78,096
Land and improvements and buildings and improvements, gross	107,186
Accumulated depreciation	$ 17,289
Depreciation life	35 years
Rentable square feet | ft²	162,785
Office Building [Member] | 599 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 13,538
Initial cost, buildings and Improvements	12,559
Costs capitalized subsequent to acquisition/ improvement	139
Land and improvements, gross	13,538
Buildings and improvements, gross	12,698
Land and improvements and buildings and improvements, gross	26,236
Accumulated depreciation	$ 4,147
Depreciation life	35 years
Rentable square feet | ft²	76,031
Office Building [Member] | 1800 Owens St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 95,388
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	428,066
Land and improvements, gross	95,388
Buildings and improvements, gross	428,066
Land and improvements and buildings and improvements, gross	523,454
Accumulated depreciation	$ 4,467
Depreciation life	35 years
Rentable square feet | ft²	0
Office Building [Member] | 601 108th Ave., Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	214,095
Costs capitalized subsequent to acquisition/ improvement	38,536
Land and improvements, gross	0
Buildings and improvements, gross	252,631
Land and improvements and buildings and improvements, gross	252,631
Accumulated depreciation	$ 79,397
Depreciation life	35 years
Rentable square feet | ft²	488,470
Office Building [Member] | 10900 NE 4th St., Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 25,080
Initial cost, buildings and Improvements	150,877
Costs capitalized subsequent to acquisition/ improvement	40,547
Land and improvements, gross	25,080
Buildings and improvements, gross	191,424
Land and improvements and buildings and improvements, gross	216,504
Accumulated depreciation	$ 54,159
Depreciation life	35 years
Rentable square feet | ft²	428,557
Office Building [Member] | 837 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	37,404
Costs capitalized subsequent to acquisition/ improvement	4,950
Land and improvements, gross	0
Buildings and improvements, gross	42,354
Land and improvements and buildings and improvements, gross	42,354
Accumulated depreciation	$ 11,132
Depreciation life	35 years
Rentable square feet | ft²	112,487
Office Building [Member] | 701 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	48,027
Costs capitalized subsequent to acquisition/ improvement	8,226
Land and improvements, gross	0
Buildings and improvements, gross	56,253
Land and improvements and buildings and improvements, gross	56,253
Accumulated depreciation	$ 15,982
Depreciation life	35 years
Rentable square feet | ft²	141,860
Office Building [Member] | 801 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	58,537
Costs capitalized subsequent to acquisition/ improvement	17,222
Land and improvements, gross	0
Buildings and improvements, gross	75,759
Land and improvements and buildings and improvements, gross	75,759
Accumulated depreciation	$ 16,318
Depreciation life	35 years
Rentable square feet | ft²	169,412
Office Building [Member] | 320 Westlake Avenue North, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 89,502
Initial cost, land and improvements	14,710
Initial cost, buildings and Improvements	82,018
Costs capitalized subsequent to acquisition/ improvement	14,378
Land and improvements, gross	14,710
Buildings and improvements, gross	96,396
Land and improvements and buildings and improvements, gross	111,106
Accumulated depreciation	$ 19,817
Depreciation life	35 years
Rentable square feet | ft²	184,644
Office Building [Member] | 321 Terry Avenue North, Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,430
Initial cost, buildings and Improvements	60,003
Costs capitalized subsequent to acquisition/ improvement	10,321
Land and improvements, gross	10,430
Buildings and improvements, gross	70,324
Land and improvements and buildings and improvements, gross	80,754
Accumulated depreciation	$ 15,561
Depreciation life	35 years
Rentable square feet | ft²	135,755
Office Building [Member] | 401 Terry Avenue North, Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,500
Initial cost, buildings and Improvements	77,046
Costs capitalized subsequent to acquisition/ improvement	13
Land and improvements, gross	22,500
Buildings and improvements, gross	77,059
Land and improvements and buildings and improvements, gross	99,559
Accumulated depreciation	$ 15,556
Depreciation life	35 years
Rentable square feet | ft²	140,605
Undeveloped land and construction in progress [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 0
Initial cost, land and improvements	1,058,176
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	1,237,954
Land and improvements, gross	1,058,176
Buildings and improvements, gross	1,237,954
Land and improvements and buildings and improvements, gross	2,296,130
Accumulated depreciation	$ 0
Rentable square feet | ft²	0

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Dispositions

12 Months Ended

Dec. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Dispositions

Dispositions

Operating Property Dispositions

The following table summarizes the operating properties sold during the years ended December 31, 2019, 2018 and 2017:

Location	Month of Disposition	Number of Buildings	Rentable Square Feet (unaudited)	Sales Price (in millions) (1)
2019 Dispositions
2829 Townsgate Road, Thousand Oaks, CA	May	1	84,098	$	18.3
2211 Michelson Drive, Irvine, CA	October	1	271,556	115.5
Total 2019 Dispositions		2	355,654	$	133.8
2018 Dispositions
1310-1327 Chesapeake Terrace, Sunnyvale, CA	November	4	266,982	$	160.3
Plaza Yarrow Bay Properties (2)	November	4	279,924	134.5
23925, 23975, & 24025 Park Sorrento, Calabasas, CA	December	3	225,340	78.2
Total 2018 Dispositions		11	772,246	$	373.0
2017 Dispositions
5717 Pacific Center Boulevard, San Diego, CA	January	1	67,995	$	12.1
Sorrento Mesa and Mission Valley Properties (3)	September	10	675,143	174.5
Total 2017 Dispositions		11	743,138	$	186.6

__________________

(1) Represents gross sales price before broker commissions and closing costs.

(2) The Plaza Yarrow Bay Properties include the following properties: 10210, 10220 and 10230 NE Points Drive & 3933 Lake Washington Boulevard NE in Kirkland, Washington.

(3) The Sorrento Mesa and Mission Valley Properties includes the following properties: 10390, 10394, 10398, 10421, 10445 and 10455 Pacific Center Court, 2355, 2365, 2375 and 2385 Northside Drive and Pacific Corporate Center - Lot 8, a 5.0 acre undeveloped land parcel.

The total gains on the sales of the operating properties sold during the years ended December 31, 2019, 2018 and 2017 were $36.8 million, $142.9 million and $39.5 million, respectively.

Land Dispositions

We did not dispose of any land parcels during the year ended December 31, 2019. During the year ended December 31, 2018, in connection with the Plaza Yarrow Bay Properties disposition listed above, we recognized a gain on sale of land of $11.8 million. During the year ended December 31, 2017, in connection with the Sorrento Mesa and Mission Valley Properties disposition listed above, we recognized a gain on sale of land of $0.4 million.

Restricted Cash Related to Dispositions

We did not have any restricted cash related to dispositions or Section 1031 Exchanges as of December 31, 2019. As of December 31, 2018, approximately $113.1 million of net proceeds related to the operating property dispositions during the year ended December 31, 2018 were temporarily being held at a qualified intermediary at our direction, for the purpose of facilitating a Section 1031 Exchange. The cash proceeds were included in restricted cash on our consolidated balance sheets at December 31, 2018. During January 2019, the Section 1031 Exchange related to this VIE was successfully completed and the cash proceeds were released from the qualified intermediary.

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CONSOLIDATED STATEMENTS OF CASH FLOWS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 215,229	$ 277,926	$ 180,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	268,045	249,882	241,862
Depreciation of non-real estate furniture, fixtures and equipment	5,085	4,400	4,024
(Recoveries of) provision for bad debts (Notes 2 and 20)	(3,433)	5,685	3,269
Non-cash amortization of share-based compensation awards (Note 15)	27,007	27,932	19,046
Non-cash amortization of deferred financing costs and net debt discounts	1,427	1,084	3,247
Non-cash amortization of net below market rents (Note 5)	(9,206)	(9,748)	(8,528)
Gains on sales of depreciable operating properties (Note 4)	(36,802)	(142,926)	(39,507)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 10)	(19,190)	(18,429)	(16,767)
Straight-line rents	(72,023)	(26,976)	(33,275)
Amortization of right of use ground lease assets (Note 2)	683
Loss on early extinguishment of debt (Note 9)	0	12,623	5,312
(Gain) loss on sale of land (Note 4)	0	(11,825)	(449)
Net change in other operating assets	(14,476)	(7,930)	(17,732)
Net change in other operating liabilities	24,175	48,345	5,895
Net cash provided by operating activities	386,521	410,043	347,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(845,464)	(489,236)	(397,440)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	(173,291)	(311,299)	(19,829)
Expenditures for acquisitions of operating properties (Note 3)	(186,258)	(257,340)	0
Expenditures for operating properties and other capital assets	(147,687)	(166,440)	(88,425)
Net proceeds received from dispositions (Note 4)	124,421	364,300	182,492
Decrease (increase) in acquisition-related deposits			(35,900)
Decrease (increase) in acquisition-related deposits	0	36,000
Proceeds received from repayment of note receivable	0	15,100	0
Net cash used in investing activities	(1,228,279)	(808,915)	(359,102)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common units (Note 14)	353,722	130,693	326,058
Redemption of Series G and H Preferred units (Note 14)	0	0	(200,000)
Net proceeds from the issuance of unsecured debt (Note 9)	499,390	648,537	674,447
Repayments of unsecured debt (Note 9)	0	(261,823)	(519,024)
Borrowings on unsecured revolving credit facility	1,110,000	765,000	270,000
Repayments on unsecured revolving credit facility	(910,000)	(690,000)	(270,000)
Borrowings on unsecured debt (Note 9)	0	120,000	0
Principal payments and repayments of secured debt (Note 9)	(76,309)	(3,584)	(130,371)
Financing costs	(6,678)	(6,262)	(11,500)
Repurchase of common units and restricted stock units (Note 15)	(14,556)	(16,553)	(12,986)
Proceeds from exercise of stock options	703	41	12,179
Contributions from noncontrolling interests in consolidated property partnerships (Note 12)	0	8,273	54,604
Distributions to noncontrolling interests in consolidated property partnerships	(12,952)	(11,803)	(16,542)
Distributions paid to common unitholders	(196,252)	(179,411)	(340,697)
Distributions paid to preferred unitholders	0	0	(7,409)
Net cash provided by (used in) financing activities	747,068	503,108	(171,241)
Net (decrease) increase in cash and cash equivalents and restricted cash	(94,690)	104,236	(183,331)
Cash and cash equivalents and restricted cash, beginning of year	171,034	66,798	250,129
Cash and cash equivalents and restricted cash, end of year	76,344	171,034	66,798
Kilroy Realty L.P. [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	215,229	277,926	180,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of real estate assets and leasing costs	268,045	249,882	241,862
Depreciation of non-real estate furniture, fixtures and equipment	5,085	4,400	4,024
(Recoveries of) provision for bad debts (Notes 2 and 20)	(3,433)	5,685	3,269
Non-cash amortization of share-based compensation awards (Note 15)	27,007	27,932	19,046
Non-cash amortization of deferred financing costs and net debt discounts	1,427	1,084	3,247
Non-cash amortization of net below market rents (Note 5)	(9,206)	(9,748)	(8,528)
Gains on sales of depreciable operating properties (Note 4)	(36,802)	(142,926)	(39,507)
Non-cash amortization of deferred revenue related to tenant-funded tenant improvements (Note 10)	(19,190)	(18,429)	(16,767)
Straight-line rents	(72,023)	(26,976)	(33,275)
Amortization of right of use ground lease assets (Note 2)	683
Loss on early extinguishment of debt (Note 9)	0	12,623	5,312
(Gain) loss on sale of land (Note 4)	0	(11,825)	(449)
Net change in other operating assets	(14,476)	(7,930)	(17,732)
Net change in other operating liabilities	24,175	48,345	5,895
Net cash provided by operating activities	386,521	410,043	347,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for development properties and undeveloped land	(845,464)	(489,236)	(397,440)
Expenditures for acquisitions of development properties and undeveloped land (Note 3)	(173,291)	(311,299)	(19,829)
Expenditures for acquisitions of operating properties (Note 3)	(186,258)	(257,340)	0
Expenditures for operating properties and other capital assets	(147,687)	(166,440)	(88,425)
Net proceeds received from dispositions (Note 4)	124,421	364,300	182,492
Decrease (increase) in acquisition-related deposits	0		(35,900)
Decrease (increase) in acquisition-related deposits		36,000
Proceeds received from repayment of note receivable	0	15,100	0
Net cash used in investing activities	(1,228,279)	(808,915)	(359,102)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common units (Note 14)	353,722	130,693	326,058
Redemption of Series G and H Preferred units (Note 14)	0	0	(200,000)
Net proceeds from the issuance of unsecured debt (Note 9)	499,390	648,537	674,447
Repayments of unsecured debt (Note 9)	0	(261,823)	(519,024)
Borrowings on unsecured revolving credit facility	1,110,000	765,000	270,000
Repayments on unsecured revolving credit facility	(910,000)	(690,000)	(270,000)
Borrowings on unsecured debt (Note 9)	0	120,000	0
Principal payments and repayments of secured debt (Note 9)	(76,309)	(3,584)	(130,371)
Financing costs	(6,678)	(6,262)	(11,500)
Repurchase of common units and restricted stock units (Note 15)	(14,556)	(16,553)	(12,986)
Proceeds from exercise of stock options	703	41	12,179
Contributions from noncontrolling interests in consolidated property partnerships (Note 12)	0	8,273	54,604
Distributions to noncontrolling interests in consolidated property partnerships	(12,952)	(11,803)	(16,542)
Distributions paid to common unitholders	(196,252)	(179,411)	(340,697)
Distributions paid to preferred unitholders	0	0	(7,409)
Net cash provided by (used in) financing activities	747,068	503,108	(171,241)
Net (decrease) increase in cash and cash equivalents and restricted cash	(94,690)	104,236	(183,331)
Cash and cash equivalents and restricted cash, beginning of year	171,034	66,798	250,129
Cash and cash equivalents and restricted cash, end of year	$ 76,344	$ 171,034	$ 66,798

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CONSOLIDATED BALANCE SHEETS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
REAL ESTATE ASSETS
Land and improvements	$ 1,466,166	$ 1,160,138
Buildings and improvements	5,866,477	5,207,984
Undeveloped land and construction in progress	2,296,130	2,058,510
Total real estate assets held for investment	9,628,773	8,426,632
Accumulated depreciation and amortization	(1,561,361)	(1,391,368)
Total real estate assets held for investment, net	8,067,412	7,035,264
CASH AND CASH EQUIVALENTS (Note 24)	60,044	51,604
RESTRICTED CASH (Notes 3, 4 and 24)	16,300	119,430
MARKETABLE SECURITIES (Notes 16 and 19)	27,098	21,779
CURRENT RECEIVABLES, NET (Notes 2, 6 and 20)	26,489	20,176
DEFERRED RENT RECEIVABLES, NET (Notes 2, 6 and 20)	337,937	267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	212,805	197,574
RIGHT OF USE GROUND LEASE ASSETS (Notes 2 and 18)	96,348
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	55,661	52,873
TOTAL ASSETS	8,900,094	7,765,707
LIABILITIES:
Secured debt, net (Notes 9 and 19)	258,593	335,531
Unsecured debt, net (Notes 9 and 19)	3,049,185	2,552,070
Unsecured line of credit (Notes 9 and 19)	245,000	45,000
Accounts payable, accrued expenses and other liabilities (Note 18)	418,848	374,415
Ground lease liabilities (Notes 2 and 18)	98,400
Accrued distributions (Notes 14 and 28)	53,219	47,559
Deferred revenue and acquisition-related intangible liabilities, net (Notes 3, 5 and 10)	139,488	149,646
Rents received in advance and tenant security deposits	66,503	60,225
Total liabilities	4,329,236	3,564,446
COMMITMENTS AND CONTINGENCIES (Note 18)
Partners’ Capital:
TOTAL LIABILITIES AND EQUITY/CAPITAL	8,900,094	7,765,707
Kilroy Realty L.P. [Member]
REAL ESTATE ASSETS
Land and improvements	1,466,166	1,160,138
Buildings and improvements	5,866,477	5,207,984
Undeveloped land and construction in progress	2,296,130	2,058,510
Total real estate assets held for investment	9,628,773	8,426,632
Accumulated depreciation and amortization	(1,561,361)	(1,391,368)
Total real estate assets held for investment, net	8,067,412	7,035,264
CASH AND CASH EQUIVALENTS (Note 24)	60,044	51,604
RESTRICTED CASH (Notes 3, 4 and 24)	16,300	119,430
MARKETABLE SECURITIES (Notes 16 and 19)	27,098	21,779
CURRENT RECEIVABLES, NET (Notes 2, 6 and 20)	26,489	20,176
DEFERRED RENT RECEIVABLES, NET (Notes 2, 6 and 20)	337,937	267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2, 3 and 5)	212,805	197,574
RIGHT OF USE GROUND LEASE ASSETS (Notes 2 and 18)	96,348
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 7)	55,661	52,873
TOTAL ASSETS	8,900,094	7,765,707
LIABILITIES:
Secured debt, net (Notes 9 and 19)	258,593	335,531
Unsecured debt, net (Notes 9 and 19)	3,049,185	2,552,070
Unsecured line of credit (Notes 9 and 19)	245,000	45,000
Accounts payable, accrued expenses and other liabilities (Note 18)	418,848	374,415
Ground lease liabilities (Notes 2 and 18)	98,400
Accrued distributions (Notes 14 and 28)	53,219	47,559
Deferred revenue and acquisition-related intangible liabilities, net (Notes 3, 5 and 10)	139,488	149,646
Rents received in advance and tenant security deposits	66,503	60,225
Total liabilities	4,329,236	3,564,446
COMMITMENTS AND CONTINGENCIES (Note 18)
Partners’ Capital:
Common units, 106,016,287 and 100,746,988 held by the general partner and 2,023,287 and 2,025,287 held by common limited partners issued and outstanding, respectively (Note 14)	4,369,758	4,003,700
Total partners’ capital	4,369,758	4,003,700
Noncontrolling interests in consolidated property partnerships and subsidiaries (Notes 2 and 12)	201,100	197,561
Total capital	4,570,858	4,201,261
TOTAL LIABILITIES AND EQUITY/CAPITAL	$ 8,900,094	$ 7,765,707

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Quarterly Financial Information of the Company (Unaudited) - Summarized Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 220,235	$ 215,525	$ 200,492	$ 201,202	$ 190,842	$ 186,562	$ 187,072	$ 182,822	$ 837,454	$ 747,298	$ 719,001
Net income	77,922	48,298	47,215	41,794	166,890	38,310	31,755	40,971	215,229	277,926	180,615
Net income attributable to Kilroy Realty Corporation	72,500	43,846	42,194	36,903	160,220	34,400	27,549	36,246	195,443	258,415	164,612
Net income available to common stockholders	$ 72,500	$ 43,846	$ 42,194	$ 36,903	$ 160,220	$ 34,400	$ 27,549	$ 36,246	$ 195,443	$ 258,415	$ 151,249
Net income available to common stockholders per share/ unit—basic (dollars per share/ unit)	$ 0.68	$ 0.41	$ 0.41	$ 0.36	$ 1.59	$ 0.34	$ 0.27	$ 0.36	$ 1.87	$ 2.56	$ 1.52
Net income available to common stockholders per share/ unit—diluted (dollars per share/ unit)	$ 0.67	$ 0.41	$ 0.41	$ 0.36	$ 1.58	$ 0.33	$ 0.27	$ 0.36	$ 1.86	$ 2.55	$ 1.51

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Acquisitions - Estimated Fair Values of Assets and Liabilities Assumed (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) acquisition
Assets
Land and improvements	$ 150,561	$ 80,269
Buildings and improvements	30,932	172,059
Deferred leasing costs and acquisition-related intangible assets	12,063	13,593
Right of use ground lease asset	13,334
Total assets acquired	206,890	265,921
Liabilities
Acquisition-related intangible liabilities	9,950	8,921
Ground lease liability	10,940
Total liabilities assumed	20,890	8,921
Net assets and liabilities acquired	$ 186,000	$ 257,000
Number of acquisitions | acquisition		2
Discount rate	4.79%
Below-market leases acquired	$ 10,000	$ 8,900
Weighted average amortization period of below-market leases	3 years 6 months	9 years 9 months 18 days
In-place leases [Member]
Assets
Deferred leasing costs and acquisition-related intangible assets	$ 9,200	$ 11,800
Liabilities
Weighted average amortization period of above-market leases in years	3 years 3 months 18 days	1 year 3 months 18 days
Deferred leasing costs [Member]
Assets
Deferred leasing costs and acquisition-related intangible assets	$ 2,900	$ 1,800
Liabilities
Weighted average amortization period of above-market leases in years	3 years 6 months	6 years 7 months 6 days

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Secured and Unsecured Debt of the Operating Partnership - Secured Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Secured Debt
Secured debt	$ 258,593	$ 335,531
Kilroy Realty L.P. [Member]
Secured Debt
Long-term debt, gross	3,579,502
Secured debt	258,593	335,531
Unamortized Deferred Financing Costs	(20,300)
Kilroy Realty L.P. [Member] | Secured debt [Member]
Secured Debt
Secured debt	259,502	336,570
Unamortized Deferred Financing Costs	(909)	(1,039)
Long-term debt	258,593	335,531
Net book value of properties pledged as collateral for secured debt	$ 251,200
Kilroy Realty L.P. [Member] | Secured debt [Member] | 3.57% Mortgage Payable due December 2026 [Member]
Secured Debt
Stated interest rate	3.57%
Effective interest rate	3.57%
Long-term debt, gross	$ 170,000	170,000
Kilroy Realty L.P. [Member] | Secured debt [Member] | 4.48% Mortgage Payable due July 2027 [Member]
Secured Debt
Stated interest rate	4.48%
Effective interest rate	4.48%
Long-term debt, gross	$ 89,502	91,332
Kilroy Realty L.P. [Member] | Secured debt [Member] | 6.05% Mortgage Payable Due June 1, 2019 [Member]
Secured Debt
Stated interest rate	6.05%
Effective interest rate	3.50%
Long-term debt, gross	$ 0	$ 75,238

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Secured and Unsecured Debt of the Operating Partnership - Debt Maturities (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Debt issuance discount	$ (6,500)
Kilroy Realty L.P. [Member]
Stated debt maturities and scheduled amortization payments, excluding debt discounts
2020	5,137
2021	5,342
2022	400,554
2023	305,775
2024	431,006
Thereafter	2,431,688
Total aggregate principal value	3,579,502
Unamortized debt issuance expense	$ (20,300)

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Dispositions - Restricted Cash Related to Dispositions (Details) $ in Millions	Dec. 31, 2018 USD ($)
Disposal group, disposed of by sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash	$ 113.1

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Partners' Capital of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2019

Class of Stock [Line Items]

Schedule of common stock sales under the at-the-market offering

The following table sets forth information regarding direct sales of our common stock under our at-the-market offering programs for the years ended December 31, 2018 and 2017:

	Year Ended December 31,
	2018		2017
	(in millions, except share data)
Shares of common stock sold during the period	1,817,195		235,077
Weighted average price per share of common stock	$	73.64	$	75.40
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

Schedule of accrued dividends and distributions

The following tables summarize accrued dividends and distributions for the noted outstanding shares of common stock and noncontrolling units as of December 31, 2019 and 2018:

	December 31,
	2019		2018
	(in thousands)
Dividends and Distributions payable to:
Common stockholders	$	51,418	$	45,840
Noncontrolling common unitholders of the Operating Partnership	981		922
RSU holders (1)	820		797
Total accrued dividends and distribution to common stockholders and noncontrolling unitholders	$	53,219	$	47,559

______________________

(1)

The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

Schedule of outstanding shares of common stock, preferred stock and noncontrolling units

	December 31,
	2019	2018
Outstanding Shares and Units:
Common stock (1)	106,016,287	100,746,988
Noncontrolling common units	2,023,287	2,025,287
RSUs (2)	1,651,905	1,711,628

______________________

(1) The amount includes nonvested shares.

(2)

The amount includes nonvested RSUs. Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

Kilroy Realty L.P. [Member]

Class of Stock [Line Items]

Schedule of common stock sales under the at-the-market offering

During the years ended December 31, 2018 and 2017, the Company utilized its at-the-market stock offering programs to issue shares of common stock. See Note 13 “Stockholders’ Equity of the Company” for additional information. The net offering proceeds contributed by the Company to the Operating Partnership in exchange for common units for the years ended December 31, 2019, 2018 and 2017 are as follows:

	Year Ended December 31,
	2018		2017
	(in millions, except share and per share data)
Shares of common stock contributed by the Company	1,817,195		235,077
Common units exchanged for shares of common stock by the Company	1,817,195		235,077
Aggregate gross proceeds	$	133.8	$	17.7
Aggregate net proceeds after selling commissions	$	132.1	$	17.5

Redeemable noncontrolling interest

The following table sets forth the number of common units held by the Company and the number of common units held by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units as well as the ownership interest held on each respective date:

	December 31, 2019		December 31, 2018
Company owned common units in the Operating Partnership	106,016,287		100,746,988
Company owned general partnership interest	98.1	%	98.0	%
Noncontrolling common units of the Operating Partnership	2,023,287		2,025,287
Ownership interest of noncontrolling interest	1.9	%	2.0	%

Schedule of accrued dividends and distributions

The following tables summarize accrued distributions for the noted common units as of December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Distributions payable to:
General partner	$	51,418	$	45,840
Common limited partners	981		922
RSU holders (1)	820		797
Total accrued distributions to common unitholders	$	53,219	$	47,559

______________________

(1)

The amount includes the value of the dividend equivalents that will be paid with additional RSUs (see Note 15 “Share-Based Compensation” for additional information).

Schedule of outstanding shares of common stock, preferred stock and noncontrolling units

	December 31, 2019	December 31, 2018
Outstanding Units:
Common units held by the general partner	106,016,287	100,746,988
Common units held by the limited partners	2,023,287	2,025,287
RSUs (1)	1,651,905	1,711,628

______________________

(1)

Does not include 932,675 and 1,018,337 market measure-based RSUs because not all the necessary performance conditions have been met as of December 31, 2019 and 2018, respectively. Refer to Note 15 “Share-Based Compensation” for additional information.

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Prepaid Expenses and Other Assets, Net (Tables)

12 Months Ended

Dec. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses and other assets, net

Prepaid expenses and other assets, net consisted of the following at December 31, 2019 and 2018:

	December 31, 2019		December 31, 2018
	(in thousands)
Furniture, fixtures and other long-lived assets, net	$	35,286	$	36,833
Notes receivable (1)	1,651		2,113
Prepaid expenses	18,724		13,927
Total prepaid expenses and other assets, net	$	55,661	$	52,873

_______________

(1) Notes receivable are shown net of a valuation allowance of approximately $3.6 million and $2.9 million as of December 31, 2019 and 2018, respectively.

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Fair Value Measurements and Disclosures (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair value of the company's marketable securities

The following table sets forth the fair value of our marketable securities as of December 31, 2019 and 2018:

	Fair Value (Level 1) (1)
	2019		2018
Description	(in thousands)
Marketable securities (2)	$	27,098	$	21,779

_______________

(1) Based on quoted prices in active markets for identical securities.

(2) The marketable securities are held in a limited rabbi trust.

Net (loss) gain on marketable securities

The following table sets forth the net (loss) gain on marketable securities recorded during the years ended December 31, 2019, 2018 and 2017:

	December 31,
	2019		2018			2017
Description	(in thousands)
Net gain (loss) on marketable securities	$	3,885	$	(1,851	)	$	3,023

Carrying value and fair value of other financial instruments

The following table sets forth the carrying value and the fair value of our other financial instruments as of December 31, 2019 and 2018: 

	December 31,
	2019				2018
	Carrying Value		Fair Value (1)		Carrying Value		Fair Value (1)
	(in thousands)
Liabilities
Secured debt, net	$	258,593	$	272,997	$	335,531	$	335,885
Unsecured debt, net	3,049,185		3,252,217		2,552,070		2,546,386
Unsecured line of credit	245,000		245,195		45,000		45,058

_______________

(1)

Fair value calculated using Level II inputs, which are based on model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

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Organization and Ownership (Details) - Dec. 31, 2019	building	property	ft²	Total	project	residential_unit	tenant
Real Estate Properties [Line Items]
Rentable Square Feet			13,475,795
Stabilized office properties [Member]
Real Estate Properties [Line Items]
Number of buildings	112	4
Rentable Square Feet			13,475,795
Number of Tenants | tenant							451
Percentage Occupied				94.60%
Percentage Leased (unaudited)				97.00%
Stabilized residential properties [Member]
Real Estate Properties [Line Items]
Number of buildings | building	1
Percentage Occupied				82.40%
Number of Units | building	200
In-process development projects - tenant improvement [Member]
Real Estate Properties [Line Items]
Number of buildings | project					2
Rentable Square Feet			846,000
In-process development projects - under construction [Member]
Real Estate Properties [Line Items]
Number of buildings | project					6
Rentable Square Feet			2,291,000
Completed residential development project [Member]
Real Estate Properties [Line Items]
Number of buildings | project					1
Rentable Units | residential_unit						237
Retail site [Member] | In-process development projects - under construction [Member]
Real Estate Properties [Line Items]
Number of residential units | residential_unit						564

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Share-Based and Other Compensation - 2019, 2018 and 2017 Share-Based Compensation Grants (Details) - shares					1 Months Ended			2 Months Ended	12 Months Ended
	Feb. 01, 2019	Dec. 27, 2018	Feb. 14, 2018	Feb. 24, 2017	Feb. 28, 2019	Dec. 31, 2018	Feb. 28, 2017	Feb. 28, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		161,290					229,976	282,038
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		483,871
Market measure-based Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	143,396	80,647	158,205	130,956	143,396
Market measure-based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		266,130			288,378
Time-Based Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		80,643					99,020	123,833		14,999	43,081
Time-Based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		217,741			144,982
Forfeited in period (in shares)									10,733
2019 Performance-Based RSUs [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeited in period (in shares)									24,353
December 2018 Market-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)						346,777
December 2018 Market-Based RSUs [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)							130,956	158,205
Time-Based Restricted Stock Units (RSUs), 2018 Special Time-Based RSU Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		298,384
Time-Based Restricted Stock Units (RSUs), 2018 Special Time-Based RSU Grant [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeited in period (in shares)									98,844

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Stockholders' Equity of the Company - At-The-Market Offering and Derivatives and Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Dividends Payable [Line Items]
Aggregate net proceeds after selling commissions	$ 353,722	$ 130,693	$ 326,058
Accrued dividend and distributions
Accrued dividends and distributions	$ 53,219	$ 47,559
Summary of shares and units
Common stock	106,016,287	100,746,988
Restricted Stock Units (RSUs) [Member]
Summary of shares and units
RSUs	1,651,905	1,711,628
Common stockholders and noncontrolling unitholders [Member]
Accrued dividend and distributions
Accrued dividends and distributions	$ 53,219	$ 47,559
Common Stock [Member]
Accrued dividend and distributions
Accrued dividends and distributions	$ 51,418	$ 45,840
Summary of shares and units
Common stock	106,016,287	100,746,988
Common units [Member]
Accrued dividend and distributions
Accrued dividends and distributions	$ 981	$ 922
Issuance of Equity under ATM Program [Member]
Dividends Payable [Line Items]
Shares of common stock sold during the period (in shares)		1,817,195	235,077
Weighted average price per share of common stock (in dollars per share)		$ 73.64	$ 75.40
Aggregate gross proceeds		$ 133,800	$ 17,700
Aggregate net proceeds after selling commissions		132,100	17,500
Kilroy Realty L.P. [Member]
Dividends Payable [Line Items]
Aggregate net proceeds after selling commissions	353,722	130,693	$ 326,058
Accrued dividend and distributions
Accrued dividends and distributions	53,219	47,559
Kilroy Realty L.P. [Member] | Restricted Stock Units (RSUs) [Member]
Accrued dividend and distributions
Accrued dividends and distributions	$ 820	$ 797
Kilroy Realty L.P. [Member] | Market measure-based Restricted Stock Units (RSUs) [Member]
Summary of shares and units
Number of RSUs outstanding (in shares)	932,675	1,018,337
Kilroy Realty L.P. [Member] | Common units [Member]
Summary of shares and units
Noncontrolling common units (in units)	2,023,287	2,025,287

XML

Supplemental Cash Flow Elements (Tables)

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flows, operating unit

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of    December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common     unitholders (Notes 13 and 28)	$	53,219	$	47,559	$	43,448
Exchange of common units of the Operating Partnership into shares of the Company’s    common stock	$	78	$	1,962	$	10,939

Supplemental cash flow information follows (in thousands):

	Year Ended December 31,
	2019		2018		2017
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$	43,607	$	44,697	$	67,336
Cash paid for amounts included in the measurement of ground lease liabilities	$	5,224	$	4,398	$	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	$	162,654	$	158,626	$	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	$	10,267	$	40,624	$	1,443
Tenant improvements funded directly by tenants	$	10,268	$	13,968	$	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	$	96,272	$	—	$	—
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	$	98,349	$	—	$	—
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$	53,219	$	47,559	$	43,448

Reconciliation of cash and cash equivalents and restricted cash

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

The following is a reconciliation of our cash and cash equivalents and restricted cash at the beginning and end of the years ended 2019, 2018 and 2017.

	Year Ended December 31,
	2019		2018		2017
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents at beginning of period	$	51,604	$	57,649	$	193,418
Restricted cash at beginning of period	119,430		9,149		56,711
Cash and cash equivalents and restricted cash at beginning of period	$	171,034	$	66,798	$	250,129
Cash and cash equivalents at end of period	$	60,044	$	51,604	$	57,649
Restricted cash at end of period	16,300		119,430		9,149
Cash and cash equivalents and restricted cash at end of period	$	76,344	$	171,034	$	66,798

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Dispositions (Tables)

12 Months Ended

Dec. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Schedule operating properties and land dispositions

The following table summarizes the operating properties sold during the years ended December 31, 2019, 2018 and 2017:

Location	Month of Disposition	Number of Buildings	Rentable Square Feet (unaudited)	Sales Price (in millions) (1)
2019 Dispositions
2829 Townsgate Road, Thousand Oaks, CA	May	1	84,098	$	18.3
2211 Michelson Drive, Irvine, CA	October	1	271,556	115.5
Total 2019 Dispositions		2	355,654	$	133.8
2018 Dispositions
1310-1327 Chesapeake Terrace, Sunnyvale, CA	November	4	266,982	$	160.3
Plaza Yarrow Bay Properties (2)	November	4	279,924	134.5
23925, 23975, & 24025 Park Sorrento, Calabasas, CA	December	3	225,340	78.2
Total 2018 Dispositions		11	772,246	$	373.0
2017 Dispositions
5717 Pacific Center Boulevard, San Diego, CA	January	1	67,995	$	12.1
Sorrento Mesa and Mission Valley Properties (3)	September	10	675,143	174.5
Total 2017 Dispositions		11	743,138	$	186.6

__________________

(1) Represents gross sales price before broker commissions and closing costs.

(2) The Plaza Yarrow Bay Properties include the following properties: 10210, 10220 and 10230 NE Points Drive & 3933 Lake Washington Boulevard NE in Kirkland, Washington.

(3) The Sorrento Mesa and Mission Valley Properties includes the following properties: 10390, 10394, 10398, 10421, 10445 and 10455 Pacific Center Court, 2355, 2365, 2375 and 2385 Northside Drive and Pacific Corporate Center - Lot 8, a 5.0 acre undeveloped land parcel.

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Quarterly Financial Information of the Operating Partnership (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information of the Operating Partnership (Unaudited)

Quarterly Financial Information of the Company (Unaudited)

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows: 

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to Kilroy Realty Corporation	36,903		42,194		43,846		72,500
Net income available to common stockholders	36,903		42,194		43,846		72,500
Net income available to common stockholders per share – basic	0.36		0.41		0.41		0.68
Net income available to common stockholders per share – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per share amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to Kilroy Realty Corporation	36,246		27,549		34,400		160,220
Net income available to common stockholders	36,246		27,549		34,400		160,220
Net income available to common stockholders per share – basic	0.36		0.27		0.34		1.59
Net income available to common stockholders per share – diluted	0.36		0.27		0.33		1.58

____________________

(1)

The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering activity during the year.

Kilroy Realty L.P. [Member]

Quarterly Financial Information of the Operating Partnership (Unaudited)

Quarterly Financial Information of the Operating Partnership (Unaudited)

Summarized quarterly financial data for the years ended December 31, 2019 and 2018 was as follows:

	2019 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	201,202	$	200,492	$	215,525	$	220,235
Net income	41,794		47,215		48,298		77,922
Net income attributable to the Operating Partnership	37,508		42,901		44,589		73,740
Net income available to common unitholders	37,508		42,901		44,589		73,740
Net income available to common unitholders per unit – basic	0.36		0.41		0.41		0.68
Net income available to common unitholders per unit – diluted	0.36		0.41		0.41		0.67
	2018 Quarter Ended (1)
	March 31,		June 30,		September 30,		December 31,
	(in thousands, except per unit amounts)
Revenues	$	182,822	$	187,072	$	186,562	$	190,842
Net income	40,971		31,755		38,310		166,890
Net income attributable to the Operating Partnership	36,893		28,015		34,993		163,309
Net income available to common unitholders	36,893		28,015		34,993		163,309
Net income available to common unitholders per unit – basic	0.36		0.27		0.34		1.58
Net income available to common unitholders per unit – diluted	0.36		0.27		0.33		1.57

___________________

(1)

The summation of the quarterly financial data may not equal the annual number reported on the consolidated statements of operations due to rounding. For the year ended December 31, 2018, the summation of the quarterly net income available to common stockholders per share does not equal the annual number reported on the consolidated statements of operations due to the Company’s at-the-market stock offering programs that occurred during the year.

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Basis of Presentation and Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

Basis of Presentation and Significant Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, 303 Second LLC, 100 First LLC, Redwood LLC and all of our wholly-owned and controlled subsidiaries. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

Partially Owned Entities and Variable Interest Entities

Our accounting policy is to consolidate entities in which we have a controlling financial interest and significant decision making control over the entity's operations. In determining whether we have a controlling financial interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, size of our investment (including loans), authority to control decisions, and contractual and substantive participating rights of the members. In addition to evaluating control rights, we consolidate entities in which the other members have no substantive kick-out rights to remove the Company as the managing member.

Entities in which the equity investors do not have sufficient equity at risk to finance their endeavors without additional financial support or the holders of the equity investment at risk do not have a controlling financial interest are VIEs. We evaluate whether an entity is a VIE and whether we are the primary beneficiary. We are deemed to be the primary beneficiary of a VIE when we have the power to direct the activities of the VIE that most significantly impact the VIEs’ economic performance and the obligation to absorb losses or receive benefits that could potentially be significant to the VIE.

If the requirements for consolidation are not met, the Company would account for investments under the equity method of accounting if we have the ability to exercise significant influence over the entity. Equity method investments would be initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period.

Accounting Pronouncement Adopted and Accounting Standards Issued But Not Yet Effective

Accounting Pronouncements Adopted January 1, 2019

Effective January 1, 2019, we adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2016-02 “Leases (Topic 842)” (“Topic 842”) and the related FASB ASU Nos. 2018-01, 2018-10, 2018-11, 2018-20 and 2019-01 which provide practical expedients, technical corrections and improvements for certain aspects of ASU 2016-02, on a modified retrospective basis. Topic 842 establishes a single comprehensive model for entities to use in accounting for leases and supersedes the existing leasing guidance. We evaluated each of the Company’s contracts to determine if the contract is or contains a lease and concluded that Topic 842 is applicable to the Company as a lessor in its tenant lease agreements and as a lessee in its ground leases.

Lessor Accounting

As a lessor, the Company’s leases with tenants for its real estate assets generally provide for the lease of space, as well as common area maintenance and parking. Under Topic 842, the lease of space is considered a lease component while the common area maintenance billings and tenant parking are considered nonlease components, which fall under revenue recognition guidance in FASB Accounting Standards Codification Topic 606 “Revenue from Contracts with Customers” (“Topic 606”). However, upon adopting the guidance in Topic 842, the Company determined that its tenant leases met the criteria to apply the practical expedient provided by ASU 2018-11 to recognize the lease and non-lease components together as one single component. This conclusion was based on the consideration that 1) the timing and pattern of transfer of the nonlease components and associated lease component are the same, and 2) the lease component, if accounted for separately, would be classified as an operating lease. As the lease of space is the predominant component of the Company’s leasing arrangements, we accounted for all lease and non-lease components as one single component under Topic 842. As a result, the adoption of Topic 842 did not have any impact on the Company’s timing or pattern of recognition of rental revenues as compared to previous guidance. Transient daily parking revenue is accounted for under the guidance in Topic 606 and included in other property income in our consolidated statements of operations.

To reflect their recognition as one lease component, base rental revenues, additional rental revenues (which consist of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs) and other lease related property income related to leases that also meet the requirements of the practical expedient provided by ASU 2018-11 have been combined in one line item subsequent to the adoption of Topic 842 for the year ended December 31, 2019 in rental income on the Company’s consolidated statements of operations. In addition, under Topic 842, lessor costs for certain services directly reimbursed by tenants, which were previously presented on a net basis under previous guidance, are required to be presented on a gross basis in revenues and expenses. During the year ended December 31, 2019, we incurred additional property expenses of $13.9 million for which we were reimbursed, that were not required to be grossed up under the previous guidance. We presented this amount on a gross basis within rental income and property expenses in the Company’s consolidated statements of operations as a result of the adoption, which had no impact on net income.

Our rental income is mostly comprised of fixed contractual payments defined under the lease that, in most cases, escalate annually over the term of the lease at fixed rates. Additionally, rental income includes variable payments for tenant reimbursements of property-related expenses and payments based on a percentage of tenant’s sales.

Accounting Standards Issued But Not Yet Effective at December 31, 2019

Accounting Pronouncements Adopted January 1, 2020

ASU No. 2016-13 “Financial Instruments - Credit Losses (Topic 326)”

On June 16, 2016, the FASB issued ASU No. 2016-13 (“ASU 2016-13”) to amend the accounting for credit losses for certain financial instruments. Under the new guidance, an entity recognizes its estimate of expected credit losses as an allowance, which the FASB believes will result in more timely recognition of such losses.  In November 2018, the FASB released ASU No. 2018-19 “Codification Improvements to Topic 326, Financial Instruments - Credit Losses.” This ASU clarifies that receivables arising from operating leases are not within the scope of Subtopic 326-20 “Financial Instruments – Credit Losses.” Instead, impairment of receivables arising from operating leases should be accounted for under Subtopic 842-30 “Leases – Lessor.” ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

ASU No. 2018-13 “Fair Value Measurement (Topic 820)”

On August 28, 2018, the FASB issued ASU No. 2018-13 (“ASU 2018-13”) to amend the disclosure requirements for fair value measurements. The amendments in ASU 2018-13 include new, modified and eliminated disclosure requirements and are the result of a broader disclosure project called FASB Concepts Statement, Conceptual Framework for Financial Reporting - Chapter 8: Notes to Financial Statements, which the Board finalized on August 28, 2018. The Board used the guidance in the Concepts Statement to improve the effectiveness of ASC 820’s disclosure requirements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for any eliminated or modified disclosures. The adoption did not have a material impact on the disclosures in the notes to the consolidated financial statements.

ASU No. 2018-15 “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40)”

On August 29, 2018, the FASB issued ASU No. 2018-15 (“ASU 2018-15”) to amend a customer’s accounting for implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. ASU 2018-15 can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The adoption did not have a material impact on the consolidated financial statements or notes to the consolidated financial statements.

Upon the adoption of Topic 842 on January 1, 2019, the method for recognizing revenue includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. For leases that are deemed probable of collection, revenue is recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination. Refer to our Significant Accounting Policies below for further discussion of our revenue recognition and allowance for uncollectible tenant and deferred rent receivables policies.

Revenue Recognition, Base Rent, Additional Rent - Reimbursements from Tenants, Other Property Income, Uncollectible Lease Receivables and Allowance for Tenant and Deferred Rent Receivables

Revenue Recognition

Rental revenue for office and retail operating properties is our principal source of revenue. We recognize revenue from base rent, additional rent (which consists of amounts due from tenants for common area maintenance, real estate taxes, and other recoverable costs), parking and other lease-related revenue once all of the following criteria are met: (i) the agreement has been fully executed and delivered, (ii) services have been rendered, (iii) the amount is fixed or determinable and (iv) payment has been received or the collectability of the amount due is probable. Lease termination fees are amortized over the remaining lease term, if applicable. If there is no remaining lease term, they are recognized when received and realized. Minimum annual rental revenues are recognized in rental revenues on a straight-line basis over the non-cancellable term of the related lease.

Base Rent

The timing of when we commence rental revenue recognition for office and retail properties depends largely on our conclusion as to whether the Company or the tenant is the owner for accounting purposes of tenant improvements at the leased property. When we conclude that we are the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements as an asset and commence rental revenue recognition when the tenant takes possession of or controls the finished space, which is generally when tenant improvements being recorded

as our assets are substantially complete. In certain instances, when we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, rental revenue recognition begins when the tenant takes possession or controls the physical use of the leased space, which may occur in phases or for an entire building or project. The determination of who owns the tenant improvements is made on a lease-by-lease basis and has a significant effect on the timing of commencement of revenue recognition.

When we conclude that the Company is the owner of tenant improvements for accounting purposes, we record the cost to construct the tenant improvements, including costs paid for or reimbursed by the tenants, as a capital asset. For these tenant-funded tenant improvements, we record the amount funded by or reimbursed by tenants as deferred revenue, which is amortized and recognized as rental income on a straight-line basis over the term of the related lease.

When we conclude that the tenant is the owner of certain tenant improvements for accounting purposes, we record our contribution towards those tenant-owned improvements as a lease incentive, which is included in deferred leasing costs and acquisition-related intangible assets, net on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the related lease.

For residential properties, we commence revenue recognition upon lease commencement. Residential rental revenue is recognized on a straight-line basis over the term of the related lease, net of any concessions.

Additional Rent - Reimbursements from Tenants

Additional rent, consisting of amounts due from tenants for common area maintenance, real estate taxes and other recoverable costs, are recognized in rental income in the period the recoverable costs are incurred. Prior to the adoption of Topic 842, such amounts were recognized in revenue as tenant reimbursements. Additional rent where we pay the associated costs directly to third-party vendors and are reimbursed by our tenants are recognized and recorded on a gross basis, with the corresponding expense recognized in property expenses or real estate taxes. Prior to the adoption of Topic 842, recoverable costs were generally recognized and recorded on a gross basis when we were the primary obligor with respect to purchasing goods and services from third-party suppliers, had discretion in selecting the supplier, and had credit risk.

Other Property Income

Other property income primarily includes amounts recorded in connection with transient daily parking, tenant bankruptcy settlement payments, broken deal income and property damage settlement related payments. Other property income also includes miscellaneous income from tenants, restoration fees and fees for late rental payments. Amounts recorded within other property income fall within the scope of Topic 606 and are recognized as revenue at the point in time when control of the goods or services transfers to the customer and our performance obligation is satisfied.

Uncollectible Lease Receivables and Allowances for Tenant and Deferred Rent Receivables

We carry our current and deferred rent receivables net of allowances for amounts that may not be collected. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations. Upon the adoption of Topic 842 on January 1, 2019, the allowances are increased or decreased through rental income, and our determination of the adequacy of the Company’s allowances for tenant receivables includes a binary assessment of whether or not substantially all of the amounts due under a tenant’s lease agreement are probable of collection. Such assessment involves using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. For leases that are deemed probable of collection, revenue continues to be recorded on a straight-line basis over the lease term. For leases that are deemed not probable of collection, revenue is recorded as the lesser of (i) the amount which would be recognized on a straight-line basis or (ii) cash that has been received from the tenant, with any tenant and deferred rent receivable balances charged as a direct write-off against rental income in the period of the change in the collectability determination.

For tenant and deferred rent receivables associated with leases whose rents are deemed probable of collection under Topic 842, we may record an allowance under other authoritative GAAP using a methodology that incorporates a specific identification analysis and an aging analysis and considers the current economic and business environment. This determination requires significant judgment and estimates about matters that are uncertain at the time the estimates are made, including the creditworthiness of specific tenants, specific industry trends and conditions, and general economic trends and conditions. Tenant and deferred rent receivables deemed probable of collection are carried net of allowances for uncollectible accounts, with increases or decreases in the allowances recorded through rental income on our consolidated statements of operations. Prior to the adoption of Topic 842 on January 1, 2019, the allowances were increased or decreased through provision for bad debts on our consolidated statements of operations.

Current tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. With respect to the allowance for uncollectible tenant receivables, the specific identification methodology analysis relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, our assessment of the tenant’s ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant.

Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds cash rents billed to date under the lease agreement. With respect to the allowance for deferred rent receivables, given the longer-term nature of these receivables, the specific identification methodology analysis evaluates each of our significant tenants and any tenants on our internal watchlist and relies on factors such as each tenant’s financial condition and its ability to meet its lease obligations. We evaluate our reserve levels quarterly based on changes in the financial condition of tenants and our assessment of the tenant’s ability to meet its lease obligations, overall economic conditions, and the current business environment.

Acquisitions

Acquisitions

Acquisitions of operating properties and development and redevelopment opportunities generally do not meet the definition of a business and are accounted for as asset acquisitions, as substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets. For these asset acquisitions, we record the acquired tangible and intangible assets and assumed liabilities based on each asset’s and liability’s relative fair value at the acquisition date of the total purchase price plus any capitalized acquisition costs. We record the acquired tangible and intangible assets and assumed liabilities of acquisitions of operating properties and development and redevelopment opportunities that meet the accounting criteria to be accounted for as business combinations at fair value at the acquisition date. Transaction costs associated with asset acquisitions are capitalized as part of the purchase price of the acquisition.

The acquired assets and assumed liabilities for an acquisition generally include but are not limited to (i) land and improvements, buildings and improvements, undeveloped land and construction in progress and (ii) identified tangible and intangible assets and liabilities associated with in-place leases, including tenant improvements, leasing costs, value of above-market and below-market operating leases and ground leases, acquired in-place lease values and tenant relationships, if any. Any debt assumed and equity (including common units of the Operating Partnership) issued in connection with a property acquisition is recorded at fair value on the date of acquisition.

The fair value of land and improvements is derived from comparable sales of land and improvements within the same submarket and/or region. The fair value of buildings and improvements, tenant improvements and leasing costs considers the value of the property as if it was vacant as well as current replacement costs and other relevant market rate information.

The fair value of the above-market or below-market component of an acquired in-place operating lease is based upon the present value (calculated using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining non-cancellable lease term and (ii) our estimate of the rents that would be paid using fair market rental rates and rent escalations at the date of acquisition measured over the remaining non-cancellable term of the lease for above-market operating leases and the initial non-cancellable term plus the term of any below-market fixed rate renewal options, if applicable, for below-market operating leases. Our below-market operating leases generally do not include fixed rate or below-market renewal options. The amounts recorded for above-market operating leases are included in deferred leasing costs and acquisition-related intangible assets, net on the

balance sheet and are amortized on a straight-line basis as a reduction of rental income over the remaining term of the applicable leases. The amounts recorded for below-market operating leases are included in deferred revenue and acquisition-related intangible liabilities, net on the balance sheet and are amortized on a straight-line basis as an increase to rental income over the remaining term of the applicable leases plus the term of any below-market fixed rate renewal options, if applicable. The amortization of a below-market ground lease obligation is recorded as an increase to ground lease expense in the consolidated statements of operations for the periods presented. The amortization of an above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The fair value of acquired in-place leases is derived based on our assessment of lost revenue and costs incurred for the period required to lease the “assumed vacant” property to the occupancy level when purchased. The amount recorded for acquired in-place leases is included in deferred leasing costs and acquisition-related intangible assets, net on the balance sheet and amortized as an increase to depreciation and amortization expense over the remaining term of the applicable leases. Fully amortized intangible assets are written off each quarter.

Operating Properties and Cost Capitalization and Depreciation and Amortization of Buildings and Improvements

Operating Properties

Operating properties are generally carried at historical cost less accumulated depreciation. Properties held for sale are reported at the lower of the carrying value or the fair value less estimated cost to sell. The cost of operating properties includes the purchase price or development costs of the properties. Costs incurred for the renovation and betterment of the operating properties are capitalized to our investment in that property. Maintenance and repairs are charged to expense as incurred.

When evaluating properties to be held and used for potential impairment, we first evaluate whether there are any indicators of impairment for any of our properties. If any impairment indicators are present for a specific property, we then evaluate the regional market conditions that could reasonably affect the property. If there are negative changes and trends in that regional market, we then perform an undiscounted cash flow analysis and compare the net carrying amount of the property to the property’s estimated undiscounted future cash flow over the anticipated holding period. If the estimated undiscounted future cash flow is less than the net carrying amount of the property, we perform an impairment loss calculation to determine if the fair value of the property is less than the net carrying value of the property. Our impairment loss calculation compares the net carrying amount of the property to the property’s estimated fair value, which may be based on estimated discounted future cash flow calculations or third-party valuations or appraisals. We would recognize an impairment loss if the property's net carrying amount exceeds the property's estimated fair value. If we were to recognize an impairment loss, the estimated fair value of the property becomes its new cost basis. For a depreciable long-lived asset, the new cost basis would be depreciated (amortized) over the remaining useful life of that asset.

Cost Capitalization

All costs clearly associated with the development, redevelopment and construction of a property are capitalized as project costs, including internal compensation costs. In addition, the following costs are capitalized as project costs during periods in which activities necessary to prepare development and redevelopment properties for their intended use are in progress: pre-construction costs essential to the development of the property, interest, real estate taxes and insurance.

• For office and retail development and redevelopment properties that are pre-leased, we cease capitalization when revenue recognition commences, which is upon substantial completion of tenant improvements deemed to be the Company’s asset for accounting purposes.

• For office and retail development and redevelopment properties that are not pre-leased, we may not immediately build out the tenant improvements. Therefore, we cease capitalization when revenue recognition commences upon substantial completion of the tenant improvements deemed to be the Company's asset for accounting purposes, but in any event, no later than one year after the cessation of major construction activities. We also cease capitalization on a development or redevelopment property when activities necessary to prepare the property for its intended use have been suspended.

• For office and retail development or redevelopment properties with multiple tenants and staged leasing, we cease capitalization and begin depreciation on the portion of the development or redevelopment property for which revenue recognition has commenced.

• For residential development properties, we cease capitalization when the property is substantially complete and available for occupancy.

Once major base building construction activities have ceased and the development or redevelopment property or phases of the development or redevelopment project is placed in service, which may occur in phases or for an entire building or project, the costs capitalized to construction in progress are transferred to land and improvements, buildings and improvements, and deferred leasing costs on our consolidated balance sheets as the historical cost of the property.

Depreciation and Amortization of Buildings and Improvements

The costs of buildings and improvements and tenant improvements are depreciated using the straight-line method of accounting over the estimated useful lives set forth in the table below.

Real Estate Assets Held for Sale, Dispositions and Discontinued Operations

Real Estate Assets Held for Sale, Dispositions and Discontinued Operations

A real estate asset is classified as held for sale when certain criteria are met, including but not limited to the availability of the asset for immediate sale, the existence of an active program to locate a buyer and the probable sale or transfer of the asset within one year. If such criteria are met, we present the applicable assets and liabilities related to the real estate asset, if material, separately on the balance sheet as held for sale and we would cease to record depreciation and amortization expense. Real estate assets held for sale are reported at the lower of their carrying value or their estimated fair value less the estimated costs to sell. As of December 31, 2019 and 2018, we did not have any properties classified as held for sale.

Property disposals representing a strategic shift that have (or will have) a major effect on the Company’s operations and financial results, such as a major line of business, a major geographical area or a major equity investment, are required to be presented as discontinued operations. If we were to determine that a property disposition represents a strategic shift, the revenues, expenses and net gain (loss) on dispositions of the property would be recorded in discontinued operations for all periods presented through the date of the applicable disposition. The operations of the properties sold during the years ended December 31, 2019, 2018 and 2017 are presented in continuing operations as they did not represent a strategic shift in the Company’s operations and financial results.

The net gains (losses) on dispositions of non-depreciable real estate property, including land, are reported in the consolidated statements of operations as gains (losses) on sale of land within continuing operations in the period the land is sold. The net gains (losses) on dispositions of depreciable real estate property are reported in the consolidated statements of operations as gains on sales of depreciable operating properties within continuing operations in the period the land is sold

Cash and Cash Equivalents

Cash and Cash Equivalents

We consider all highly-liquid investments with original maturities of three months or less to be cash equivalents

Restricted Cash

Restricted Cash

Restricted cash consists of cash proceeds from dispositions that are temporarily held at qualified intermediaries for purposes of facilitating potential Section 1031 Exchanges and cash held in escrow related to acquisition and

disposition holdbacks. Restricted cash also includes cash held as collateral to provide credit enhancement for the Operating Partnership’s mortgage debt, including cash reserves for capital expenditures, tenant improvements and property taxes.

Marketable Securities

Marketable securities reported in our consolidated balance sheets represent the assets held in connection with the Kilroy Realty Corporation 2007 Deferred Compensation Plan (the “Deferred Compensation Plan”) (see Note 16 “Employee Benefit Plans” for additional information). The Deferred Compensation Plan assets are held in a limited rabbi trust and invested in various mutual and money market funds. As a result, the marketable securities are treated as trading securities for financial reporting purposes and are adjusted to fair value at the end of each accounting period, with the corresponding gains and losses recorded in interest income and other net investment gains (losses).

Deferred Compensation Plan

At the time eligible management employees (“Participants”) defer compensation or earn mandatory Company contributions, or if we were to make a discretionary contribution, we record compensation cost and a corresponding deferred compensation plan liability, which is included in accounts payable, accrued expenses, and other liabilities on our consolidated balance sheets. This liability is adjusted to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each Participant, and the impact of adjusting the liability to fair value is recorded as an increase or decrease to compensation cost. The impact of adjusting the deferred compensation plan liability to fair value and the changes in the value of the marketable securities held in connection with the Deferred Compensation Plan generally offset and therefore do not significantly impact net income.

Deferred Leasing Costs

Deferred Leasing Costs

Costs incurred in connection with successful property leasing are capitalized as deferred leasing costs and classified as investing activities in the statement of cash flows. Under Topic 842, initial direct costs include only those costs that are incremental to the arrangement and would not have been incurred if the lease had not been obtained. As a result, subsequent to the adoption of Topic 842 on January 1, 2019, deferred leasing costs consist of leasing commissions paid to external third party brokers and lease incentives, and the Company no longer capitalizes internal leasing costs and third-party legal leasing costs. Prior to the adoption of Topic 842, deferred leasing costs consisted primarily of leasing commissions, lease incentives, legal costs and certain internal payroll costs. Deferred leasing costs are amortized using the straight-line method of accounting over the lives of the leases which generally range from one to 20 years. We reevaluate the remaining useful lives of leasing costs as the creditworthiness of our tenants and economic and market conditions change. If we determine that the estimated remaining life of a lease has changed, we adjust the amortization period accordingly. Fully amortized deferred leasing costs are written off each quarter.

Deferred Financing Costs, and Debt Discounts and Premiums

Deferred Financing Costs

Financing costs related to the origination or assumption of long-term debt are deferred and generally amortized using the straight-line method of accounting, which approximates the effective interest method, over the contractual terms of the applicable financings. Fully amortized deferred financing costs are written off when the corresponding financing is repaid.

Debt Discounts and Premiums

Original issuance debt discounts and discounts/premiums related to recording debt acquired in connection with operating property acquisitions at fair value are generally amortized and accreted on a straight-line basis, which approximates the effective interest method. Discounts are recorded as additional interest expense from date of issuance or acquisition through the contractual maturity date of the related debt. Premiums are recorded as a reduction to interest expense from the date of issuance or acquisition through the contractual maturity date of the related debt.

Noncontrolling Interests and Common Partnership Interests

Noncontrolling Interests - Common Units of the Operating Partnership in the Company's Consolidated Financial Statements

Common units of the Operating Partnership within noncontrolling interests in the Company’s consolidated financial statements represent the common limited partnership interests in the Operating Partnership not held by the Company (“noncontrolling common units”). Noncontrolling common units are presented in the equity section of the Company’s consolidated balance sheets and are reported at their proportionate share of the net assets of the Operating Partnership. Noncontrolling interests with redemption provisions that permit the issuer to settle in either cash or shares of common stock must be further evaluated to determine whether equity or temporary equity classification on the balance sheet is appropriate. Since the common units contain such a provision, we evaluated the accounting guidance and determined that the common units qualify for equity presentation in the Company’s consolidated financial statements. Net income attributable to noncontrolling common units is allocated based on their relative ownership percentage of the Operating Partnership during the reported period. The noncontrolling interest ownership percentage is determined by dividing the number of noncontrolling common units by the total number of common units outstanding. The issuance or redemption of additional shares of common stock or common units results in changes to the noncontrolling interest percentage as well as the total net assets of the Company. As a result, all equity transactions result in an allocation between equity and the noncontrolling interest in the Company’s consolidated balance sheets and statements of equity to account for the changes in the noncontrolling interest ownership percentage as well as the change in total net assets of the Company.

Noncontrolling Interests in Consolidated Property Partnerships

Noncontrolling interests in consolidated property partnerships represent the equity interests held by unrelated third parties in our three consolidated property partnerships (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” and see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”). Noncontrolling interests in consolidated property partnerships are not redeemable and are presented as permanent equity in the Company's consolidated balance sheets. We account for the noncontrolling interests in consolidated property partnerships using the hypothetical liquidation at book value (“HLBV”) method to attribute the earnings or losses of the consolidated property partnerships between the controlling and noncontrolling interests. Under the HLBV method, the amounts reported as noncontrolling interests in consolidated property partnerships in the consolidated balance sheets represent the amounts the noncontrolling interests would hypothetically receive at each balance sheet reporting date under the liquidation provisions of the governing agreements assuming the net assets of the consolidated property partnerships were liquidated at recorded amounts and distributed between the controlling and noncontrolling interests in accordance with the governing documents. The net income attributable to noncontrolling interests in consolidated property partnerships in the consolidated statements of operations is associated with the increase or decrease in the noncontrolling interest holders’ contractual claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the end of that reporting period when compared with their claims on the respective entities’ balance sheets assuming a hypothetical liquidation at the beginning of that reporting period, after removing any contributions or distributions.

Common Partnership Interests on the Operating Partnership’s Consolidated Balance Sheets

The common units held by the Company and the noncontrolling common units held by the common limited partners are both presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets in partners’ capital. The redemption rights of the noncontrolling common units permit us to settle the redemption obligation in either cash or shares of the Company’s common stock at our option (see Note 11 “Noncontrolling Interests on the Company’s Consolidated Financial Statements” for additional information).

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Noncontrolling interests in the Operating Partnership’s consolidated financial statements include the noncontrolling interest in property partnerships (see Note 12 “Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements”) and the Company’s 1.0% general partnership interest in the Finance Partnership. The 1.0% general partnership interest in the Finance Partnership noncontrolling interest is presented in the permanent equity section of the Operating Partnership’s consolidated balance sheets given that these interests are not convertible or redeemable into any other ownership interest of the Company or the Operating Partnership.

Equity Offerings

Equity Offerings

Underwriting commissions and offering costs incurred in connection with common equity offerings and our at-the-market stock offering program (see Note 13 “Stockholders’ Equity of the Company”) are reflected as a reduction of additional paid-in capital. Issuance costs incurred in connection with preferred equity offerings are reflected as a reduction of the carrying value of the preferred equity.

Sales of our common stock under forward equity sale agreements (such as those under the forward equity offering executed in August 2018 and those under the 2018 At-The-Market Program, as discussed in Note 13 “Stockholders’ Equity of the Company”) meet the derivatives and hedging guidance scope exception to be accounted for as equity instruments based on the following assessment: (i) none of the agreements’ exercise contingencies were based on observable markets or indices besides those related to the market for our own stock price and operations; and (ii) none of the settlement provisions precluded the agreements from being indexed to our own stock.

The net proceeds from any equity offering of the Company are generally contributed to the Operating Partnership in exchange for a number of common units equivalent to the number of shares of common stock issued and are reflected in the Operating Partnership’s consolidated financial statements as an increase in partners’ capital.

Share-based Incentive Compensation Accounting

Share-based Incentive Compensation Accounting

Compensation cost for all share-based awards, including options, requires measurement at estimated fair value on the grant date. Compensation cost is recognized on a straight-line basis over the service vesting period, which represents the requisite service period. The grant date fair value of market measure-based share-based compensation plans are calculated using a Monte Carlo simulation pricing model. The grant date fair value of stock option grants is calculated using the Black-Scholes valuation model. Equity awards settled in cash are valued at the fair value of our common stock on the period end date through the settlement date. Equity awards settled in cash are remeasured at each reporting period and are recognized as a liability in the consolidated balance sheet during the vesting period until settlement. Forfeitures of all share-based awards are recognized when they occur.

For share-based awards in which the performance period precedes the grant date, we recognize compensation cost over the requisite service period, which includes both the performance and service vesting periods, using the accelerated attribution expense method. The requisite service period begins on the date the Executive Compensation Committee authorizes the award and adopts any relevant performance measures.

For share-based awards with performance-based measures, the total estimated compensation cost is based on our most recent estimate of the probable achievement of the pre-established specific corporate performance measures. These estimates are based on actual results and our latest internal forecasts for each performance measure. For share-based awards with market measures, the total estimated compensation cost is based on the fair value of the award at the grant date. For share-based awards with performance-based measures and market measures, the total estimated compensation cost is based on the fair value per share at the grant date multiplied by our most recent estimate of the number of shares to be earned based on actual results and the probable achievement of the pre-established corporate performance measures based on our latest internal forecasts.

In accordance with the provisions of our share-based incentive compensation plan, we accept the return of shares of Company common stock, at the current quoted market price, from employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

For share-based awards granted by the Company, the Operating Partnership issues a number of common units equal to the number of shares of common stock ultimately granted by the Company in respect of such awards.

Basic and Diluted Net Income Available to Common Stockholders per Share

Basic and Diluted Net Income Available to Common Stockholders per Share

Basic net income available to common stockholders per share is computed by dividing net income available to common stockholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of shares of common stock outstanding for the period. Diluted net income available to

common stockholders per share is computed by dividing net income available for common stockholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of shares of common stock outstanding for the period plus the assumed exercise of all dilutive securities. The impact of the outstanding common units is considered in the calculation of diluted net income available to common stockholders per share. The common units are not reflected in the diluted net income available to common stockholders per share calculation because the exchange of common units into common stock is on a one for one basis, and the common units are allocated net income on a per share basis equal to the common stock (see Note 21 “Net Income Available to Common Stockholders Per Share of the Company”). Accordingly, any exchange would not have any effect on diluted net income (loss) available to common stockholders per share.

Nonvested share-based payment awards (including nonvested restricted stock units (“RSUs”), vested market-measure RSUs and vested dividend equivalents issued to holders of RSUs) containing nonforfeitable rights to dividends or dividend equivalents are accounted for as participating securities and included in the computation of basic and diluted net income available to common stockholders per share pursuant to the two-class method. The dilutive effect of shares issuable under executed forward equity sale agreements and stock options are reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. The dilutive effect of the outstanding nonvested shares of common stock (“nonvested shares”) and RSUs that have not yet been granted but are contingently issuable under the share-based compensation programs is reflected in the weighted average diluted shares calculation by application of the treasury stock method at the beginning of the quarterly period in which all necessary conditions have been satisfied.

Basic and Diluted Net Income Available to Common Unitholders per Unit

Basic net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the weighted-average number of vested common units outstanding for the period. Diluted net income available to common unitholders per unit is computed by dividing net income available to common unitholders, after preferred distributions and the allocation of income to participating securities, by the sum of the weighted-average number of common units outstanding for the period plus the assumed exercise of all dilutive securities.

The dilutive effect of stock options, outstanding nonvested shares, RSUs, awards containing nonforfeitable rights to dividend equivalents and shares issuable under executed forward equity sale agreements are reflected in diluted net income available to common unitholders per unit in the same manner as noted above for net income available to common stockholders per share.

Fair Value Measurements

Fair Value Measurements

The fair values of our financial assets and liabilities are disclosed in Note 19, “Fair Value Measurements and Disclosures,” to our consolidated financial statements. The only financial assets recorded at fair value on a recurring basis in our consolidated financial statements are our marketable securities. We elected not to apply the fair value option for any of our eligible financial instruments or other items.

We determine the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy:

• Level 1 – quoted prices for identical instruments in active markets;

• Level 2 – quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and

• Level 3 – fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.

We determine the fair value for the marketable securities using quoted prices in active markets for identical assets. Our other financial instruments, which are only disclosed at fair value, are comprised of secured debt, unsecured senior notes, unsecured line of credit and unsecured term loan facility.

We generally determine the fair value of our secured debt, unsecured debt, and unsecured line of credit by performing discounted cash flow analyses using an appropriate market discount rate. We calculate the market rate by obtaining period-end treasury rates for maturities that correspond to the maturities of our fixed-rate debt and then adding an appropriate credit spread based on information obtained from third-party financial institutions. These credit spreads take into account factors, including but not limited to, our credit profile, the tenure of the debt, amortization period, whether the debt is secured or unsecured, and the loan-to-value ratio of the debt to the collateral. These calculations are significantly affected by the assumptions used, including the discount rate, credit spreads and estimates of future cash flow. We calculate the market rate of our unsecured line of credit, unsecured term loan facility, and unsecured term loan by obtaining the period-end London Interbank Offered Rate (“LIBOR”) and then adding an appropriate credit spread based on our credit ratings, and the amended terms of our unsecured line of credit, unsecured term loan facility, and unsecured term loan agreement. We determine the fair value of each of our publicly traded unsecured senior notes based on their quoted trading price at the end of the reporting period, if such prices are available.

Carrying amounts of our cash and cash equivalents, restricted cash and accounts payable approximate fair value due to their short-term maturities.

Income Taxes

Income Taxes

We have elected to be taxed as a REIT under Sections 856 through 860 of the Code. To qualify as a REIT, we must distribute annually at least 90% of our adjusted taxable income, as defined in the Code, to our stockholders and satisfy certain other organizational and operating requirements. We generally will not be subject to federal income taxes if we distribute 100% of our taxable income for each year to our stockholders. If we fail to qualify as a REIT in any taxable year, we will be subject to federal income taxes (including any applicable alternative minimum tax) on our taxable income at regular corporate rates and we may not be able to qualify as a REIT for four subsequent taxable years. Even if we qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property and to federal income taxes and excise taxes on our undistributed taxable income. We believe that we have met all of the REIT distribution and technical requirements for the years ended December 31, 2019, 2018 and 2017, and we were not subject to any federal income taxes (see Note 25 “Tax Treatment of Distributions” for additional information). We intend to continue to adhere to these requirements and maintain the Company’s REIT status. Accordingly, no provision for income taxes has been made in the accompanying financial statements.

In addition, any taxable income from our taxable REIT subsidiaries, which were formed in 2002, 2018 and 2019, are subject to federal, state, and local income taxes. For the years ended December 31, 2019, 2018 and 2017 the taxable REIT subsidiaries had de minimis taxable income.

Uncertain Tax Positions

Uncertain Tax Positions

We include favorable tax positions in the calculation of tax liabilities if it is more likely than not that our adopted tax position will prevail if challenged by tax authorities.

We evaluated the potential impact of identified uncertain tax positions for all tax years still subject to audit under state and federal income tax law and concluded that we did not have any unrecognized tax benefits or any additional tax liabilities as of December 31, 2019 or 2018. As of December 31, 2019, the years still subject to audit are 2015 through 2019 under the California state income tax law and 2016 through 2019 under the federal income tax law.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

Segments

Segments

We currently operate in one operating segment, our office properties segment.

Concentration of Credit Risk

Concentration of Credit Risk

All of our properties and development and redevelopment projects are owned and all of our business is currently conducted in the state of California with the exception of the ownership and operation of eight office properties, one development project under construction and one recently acquired future development project located in the state of Washington. The ability of tenants to honor the terms of their leases is dependent upon the economic, regulatory, and social factors affecting the communities in which our tenants operate.

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Net Income Available to Common Stockholders Per Share of the Company - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income attributable to Kilroy Realty Corporation									$ 195,443	$ 258,415	$ 164,612
Preferred dividends and distributions									0	0	(13,363)
Allocation to participating securities									(2,119)	(2,004)	(1,975)
Numerator for basic and diluted net income available to common stockholders									$ 193,324	$ 256,411	$ 149,274
Denominator:
Basic weighted average vested shares/units outstanding (in shares/units)									103,200,568	99,972,359	98,113,561
Effect of dilutive securities (in shares)									648,600	510,006	613,770
Diluted weighted average vested shares and common stock/ unit equivalents outstanding (in shares/units)									103,849,168	100,482,365	98,727,331
Basic earnings per share:
Net income available to common stockholders per share - basic (in dollars per share)	$ 0.68	$ 0.41	$ 0.41	$ 0.36	$ 1.59	$ 0.34	$ 0.27	$ 0.36	$ 1.87	$ 2.56	$ 1.52
Diluted earnings per share:
Net income available to common stockholders per share - diluted (in dollars per share)	$ 0.67	$ 0.41	$ 0.41	$ 0.36	$ 1.58	$ 0.33	$ 0.27	$ 0.36	$ 1.86	$ 2.55	$ 1.51

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Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

12 Months Ended

Dec. 31, 2019

Noncontrolling Interest [Abstract]

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Noncontrolling Interests on the Company’s Consolidated Financial Statements

Common Units of the Operating Partnership

The Company owned a 98.1% and 98.0% common general partnership interest in the Operating Partnership as of December 31, 2019 and 2018, respectively. The remaining 1.9% and 2.0% common limited partnership interest as of December 31, 2019 and 2018, respectively, was owned by non-affiliated investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 2,023,287 and 2,025,287 common units outstanding held by these investors, executive officers and directors as of December 31, 2019 and 2018, respectively. The decrease in the common units from December 31, 2018 to December 31, 2019 was attributable to 2,000 common unit redemptions.

The noncontrolling common units may be redeemed by unitholders for cash. Except under certain circumstances, we, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. If satisfied in cash, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $167.7 million and $126.4 million as of December 31, 2019 and 2018, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each noncontrolling common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the liquidating distribution payable in respect of each share of the Company’s common stock.

Noncontrolling Interest in Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with Norges Bank Real Estate Management (“NBREM”) whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. The transactions did not meet the criteria to qualify as sales of real estate because the Company continues to effectively control the properties and therefore continued to account for the 100 First Street and 303 Second Street office properties on a consolidated basis in its financial statements. At formation, the Company accounted for the transactions as equity transactions and recognized noncontrolling interests in its consolidated balance sheets.

The noncontrolling interests in 100 First LLC and 303 Second LLC as of December 31, 2019 and 2018 were $189.6 million and $186.4 million, respectively. The remaining amount of noncontrolling interests in consolidated property partnerships represents the third party equity interest in Redwood LLC. This noncontrolling interest was $5.8 million and $6.0 million as of December 31, 2019 and 2018, respectively.

Noncontrolling Interests on the Operating Partnership’s Consolidated Financial Statements

Consolidated Property Partnerships

In August 2016, the Operating Partnership entered into agreements with NBREM whereby NBREM made contributions, through two REIT subsidiaries, for a 44% common equity interest in two existing companies that owned the Company’s 100 First Street and 303 Second Street office properties located in San Francisco, California. Refer to Note 11 for additional information regarding these consolidated property partnerships.

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Secured and Unsecured Debt of the Company

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Secured and Unsecured Debt of the Company

Secured and Unsecured Debt of the Company

In this Note 8, the “Company” refers solely to Kilroy Realty Corporation and not to any of our subsidiaries. The Company itself does not hold any indebtedness. All of our secured and unsecured debt is held directly by the Operating Partnership.

The Company generally guarantees all the Operating Partnership’s unsecured debt obligations including the unsecured revolving credit facility, the $150.0 million unsecured term loan facility and all of the unsecured senior notes. At December 31, 2019 and 2018, the Operating Partnership had $3.3 billion and $2.6 billion, respectively, outstanding in total, including unamortized discounts and deferred financing costs, under these unsecured debt obligations.

In addition, although the remaining $0.3 billion of the Operating Partnership’s debt as of December 31, 2019 and 2018, is secured and non-recourse to the Company, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments and environmental liabilities.

Debt Covenants and Restrictions

One of the covenants contained within the unsecured revolving credit facility and the unsecured term loan facility as discussed further below in Note 9 prohibits the Company from paying dividends during an event of default in excess of an amount which results in distributions to us in an amount sufficient to permit us to pay dividends to our stockholders that we reasonably believe are necessary to (a) maintain our qualification as a REIT for federal and state income tax purposes and (b) avoid the payment of federal or state income or excise tax.

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Commitments and Contingencies - Minimum Commitment Under Ground Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Minimum commitment under our ground leases
2020	$ 5,641
2021	5,641
2022	5,642
2023	5,662
2024	5,662
Thereafter	286,385
Total	314,633
Present value discount	(216,233)
Ground lease liabilities	$ 98,400	$ 98,349
Minimum commitment under our ground leases
2019			$ 5,154
2020			5,154
2021			5,154
2022			5,154
2023			5,154
Thereafter			233,619
Total			$ 259,389

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2019

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

401(k) Plan

We have a retirement savings plan designed to qualify under Section 401(k) of the Code (the “401(k) Plan”). Our employees are eligible to participate in the 401(k) Plan on the first day of the month after three months of service. The 401(k) Plan allows eligible employees (“401(k) Participants”) to defer up to 60% of their eligible compensation on a pre-tax basis, subject to certain maximum amounts allowed by the Code. The 401(k) Plan provides for a matching contribution by the Company in an amount equal to 50 cents of each one dollar of participant contributions up to a maximum of 10% of the 401(k) Participant’s annual salary. 401(k) Participants vest immediately in the amounts contributed by us. For each of the years ended December 31, 2019, 2018, and 2017, we contributed $1.6 million, $1.5 million and $1.3 million, respectively, to the 401(k) Plan.

Deferred Compensation Plan

In 2007, we adopted the Deferred Compensation Plan, under which directors and certain management employees may defer receipt of their compensation, including up to 70% of their salaries and up to 100% of their director fees and bonuses, as applicable. In addition, employee participants will receive mandatory Company contributions to their Deferred Compensation Plan accounts equal to 10% of their gross monthly salaries, without regard to whether such employees elect to defer salary or bonus compensation under the Deferred Compensation Plan. Our Board may, but has no obligation to, approve additional discretionary contributions by the Company to Participant accounts. We hold the Deferred Compensation Plan assets in a limited rabbi trust, which is subject to the claims of our creditors in the event of bankruptcy or insolvency.

See Note 19 “Fair Value Measurements and Disclosures” for further discussion of our Deferred Compensation Plan assets as of December 31, 2019 and 2018. Our liability of $27.0 million and $21.7 million under the Deferred Compensation Plan was fully funded as of December 31, 2019 and 2018, respectively.

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Supplemental Cash Flow Information of the Operating Partnership - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	$ 43,607	$ 44,697	$ 67,336
Capitalized interest	77,666	65,627	44,757
Cash paid for amounts included in the measurement of ground lease liabilities	5,224
Cash paid for amounts included in the measurement of ground lease liabilities		4,398	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	162,654	158,626	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	10,267	40,624	1,443
Tenant improvements funded directly by tenants	10,268	13,968	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	96,348			$ 96,272
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	98,400			98,349
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	53,219	47,559	43,448
Kilroy Realty L.P. [Member]
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $77,666, $65,627, and $44,757 as of December 31, 2019, 2018 and 2017, respectively	43,607	44,697	67,336
Capitalized interest	77,666	65,627	44,757
Cash paid for amounts included in the measurement of ground lease liabilities	5,224
Cash paid for amounts included in the measurement of ground lease liabilities		4,398	4,809
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	162,654	158,626	116,089
Assumption of accrued liabilities in connection with acquisitions (Note 3)	10,267	40,624	1,443
Tenant improvements funded directly by tenants	10,268	13,968	15,314
Initial measurement of operating right of use ground lease assets (Notes 2, 3 and 18)	96,348			96,272
Initial measurement of operating ground lease liabilities (Notes 2, 3 and 18)	98,400			$ 98,349
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Notes 14 and 28)	$ 53,219	$ 47,559	$ 43,448