10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2011

¨ 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 001-32336 (Digital Realty Trust, Inc.)

                                             000-54023 (Digital Realty Trust, L.P.)

DIGITAL REALTY TRUST, INC.

DIGITAL REALTY TRUST, L.P.

(Exact name of registrant as specified in its charter)

Maryland (Digital Realty Trust, Inc.) Maryland (Digital Realty Trust, L.P.)	26-0081711 20-2402955
(State or other jurisdiction of incorporation or organization)	(IRS employer identification number)
560 Mission Street, Suite 2900 San Francisco, CA	94105
(Address of principal executive offices)	(Zip Code)

(415) 738-6500

(Registrant’s telephone number, including area code)

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.

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, L.P.	Yes  x      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).

Digital Realty Trust, Inc.	Yes  x      No   ¨
Digital Realty Trust, 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.

Digital Realty Trust, Inc.:

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Digital Realty Trust, L.P.:

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

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

Digital Realty Trust, Inc.	Yes  ¨    No   x
Digital Realty Trust, L.P.	Yes  ¨    No   x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Digital Realty Trust, Inc.:

Class	Outstanding at May 3, 2011
Common Stock, $.01 par value per share	95,168,364

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the quarter ended March 31, 2011 of Digital Realty Trust, Inc., a Maryland corporation, and Digital Realty Trust, L.P., a Maryland limited partnership, of which Digital Realty Trust, Inc. is the sole general partner. Unless otherwise indicated or unless the context requires otherwise, all references in this report to “we,” “us,” “our,” “our company” or “the company” refer to Digital Realty Trust, Inc. together with its consolidated subsidiaries, including Digital Realty Trust, L.P. Unless otherwise indicated or unless the context requires otherwise, all references to “our operating partnership” or “the operating partnership” refer to Digital Realty Trust, L.P. together with its consolidated subsidiaries.

Digital Realty Trust, Inc. is a real estate investment trust, or REIT, and the sole general partner of Digital Realty Trust, L.P. As of March 31, 2011, Digital Realty Trust, Inc. owned an approximate 94.4% common general partnership interest in Digital Realty Trust, L.P. The remaining approximate 5.6% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of Digital Realty Trust, Inc. As of March 31, 2011, Digital Realty Trust, Inc. owned all of the preferred limited partnership interests of Digital Realty Trust, L.P. As the sole general partner of Digital Realty Trust, L.P., Digital Realty Trust, Inc. has the full, exclusive and complete responsibility for the operating partnership’s day-to-day management and control.

We believe combining the quarterly reports on Form 10-Q of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. into this single report results in the following benefits:

• enhancing investors’ understanding of our company and our operating partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both our company and our operating partnership; and

• creating time and cost efficiencies through the preparation of one combined report instead of two separate reports.

There are few differences between our company and our operating partnership, which are reflected in the disclosure in this report. We believe it is important to understand the differences between our company and our operating partnership in the context of how Digital Realty Trust, Inc. and Digital Realty Trust, L.P. operate as an interrelated consolidated company. Digital Realty Trust, Inc. is a REIT, whose only material asset is its ownership of partnership interests of Digital Realty Trust, L.P. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of Digital Realty Trust, L.P., issuing public equity from time to time and guaranteeing certain unsecured debt of Digital Realty Trust, L.P. Digital Realty Trust, Inc. itself does not issue any indebtedness but guarantees some of the unsecured debt of Digital Realty Trust, L.P., as disclosed in this report. Digital Realty Trust, L.P. holds substantially all the assets of the company and holds the ownership interests in the company’s joint ventures. Digital Realty Trust, L.P. conducts the operations of the business and is structured as a partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to Digital Realty Trust, L.P. in exchange for partnership units, Digital Realty Trust, L.P. generates the capital required by the company’s business through Digital Realty Trust, L.P.’s operations, by Digital Realty Trust, L.P.’s direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholders’ equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of Digital Realty Trust, L.P. The common limited partnership interests held by the limited partners in Digital Realty Trust, L.P. are presented as limited partners’ capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in Digital Realty Trust, L.P. are presented as general partner’s capital within partners’ capital in Digital Realty Trust, L.P.’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Digital Realty Trust, L.P. levels.

2

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:

• condensed consolidated financial statements;

• the following notes to the condensed consolidated financial statements:

• Debt;

• Equity of the company and Capital of the operating partnership; and

• Income per Share and Income per Unit;

• Liquidity and Capital Resources in Management’s Discussion and Analysis of Financial Condition and Results of Operations; and

• Unregistered Sales of Equity Securities and Use of Proceeds.

This report also includes separate Item 4. Controls and Procedures sections and separate Exhibit 31 and 32 certifications for each of the company and the operating partnership in order 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 the operating partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934 and 18 U.S.C. §1350.

In order to highlight the differences between the company and the operating partnership, the separate sections in this report for the company and the operating partnership specifically refer to the company and the operating partnership. In the sections that combine disclosure of the company and the operating partnership, this report refers to actions or holdings as being actions or holdings of the company. Although the operating partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the company is appropriate because the business is one enterprise and the company operates the business through the operating partnership.

As general partner with control of the operating partnership, Digital Realty Trust, Inc. consolidates the operating partnership for financial reporting purposes, and it does not have significant assets other than its investment in the operating partnership. Therefore, the assets and liabilities of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. are the same on their respective condensed consolidated financial statements. The separate discussions of Digital Realty Trust, Inc. and Digital Realty Trust, L.P. in this report should be read in conjunction with each other to understand the results of the company on a consolidated basis and how management operates the company.

3

DIGITAL REALTY TRUST, INC. AND DIGITAL REALTY TRUST, L.P.

FORM 10-Q

FOR THE QUARTER ENDED MARCH 31, 2011

TABLE OF CONTENTS

		Page Number
PART I.	FINANCIAL INFORMATION
ITEM 1.	Condensed Consolidated Financial Statements of Digital Realty Trust, Inc.:
	Condensed Consolidated Balance Sheets as of March 31, 2011 (unaudited) and December 31, 2010		5
	Condensed Consolidated Income Statements for the three months ended March  31, 2011 and 2010 (unaudited)		6
	Condensed Consolidated Statement of Equity for the three months ended March 31, 2011 (unaudited)		7
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March  31, 2011 and 2010 (unaudited)		8
	Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2011 and 2010 (unaudited)		9
	Condensed Consolidated Financial Statements of Digital Realty Trust, L.P.:
	Condensed Consolidated Balance Sheets as of March 31, 2011 (unaudited) and December 31, 2010		11
	Condensed Consolidated Income Statements for the three months ended March 31, 2011 and 2010 (unaudited)		12
	Condensed Consolidated Statement of Capital for the three months ended March 31, 2011 (unaudited)		13
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March  31, 2011 and 2010 (unaudited)		14
	Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2011 and 2010 (unaudited)		15
	Notes to Condensed Consolidated Financial Statements of Digital Realty Trust, Inc. and Digital Realty Trust, L.P.		17
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		48
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk		69
ITEM 4.	Controls and Procedures (Digital Realty Trust, Inc.)		71
	Controls and Procedures (Digital Realty Trust, L.P.)		71
PART II.	OTHER INFORMATION		72
ITEM 1.	Legal Proceedings		72
ITEM 1A.	Risk Factors		72
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds		72
ITEM 3.	Defaults Upon Senior Securities		72
ITEM 4.	Removed and Reserved		72
ITEM 5.	Other Information		72
ITEM 6.	Exhibits		73
	Signatures		75
	Exhibit Index		76

4

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

	March  31, 2011			December  31, 2010
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	480,788		$	478,629
Acquired ground leases		6,666			6,374
Buildings and improvements		4,662,458			4,459,047
Tenant improvements		287,440			283,492
Total investments in properties		5,437,352			5,227,542
Accumulated depreciation and amortization		(720,610	)		(660,700	)
Net investments in properties		4,716,742			4,566,842
Investment in unconsolidated joint ventures		17,962			17,635
Net investments in real estate		4,734,704			4,584,477
Cash and cash equivalents		44,368			11,719
Accounts and other receivables, net of allowance for doubtful accounts of $2,331 and $3,250 as of March 31, 2011 and December 31, 2010, respectively		78,992			70,337
Deferred rent		203,708			190,067
Acquired above market leases, net		37,421			40,539
Acquired in place lease value and deferred leasing costs, net		327,625			334,366
Deferred financing costs, net		23,836			22,825
Restricted cash		59,836			60,062
Other assets		26,855			15,091
Total assets	$	5,537,345		$	5,329,483
LIABILITIES AND EQUITY
Revolving credit facility	$	209,687		$	333,534
Unsecured senior notes, net of discount		1,465,351			1,066,030
Exchangeable senior debentures, net of discount		318,669			353,702
Mortgage loans, net of premiums		1,051,222			1,043,188
Other secured loan		10,500			10,500
Accounts payable and other accrued liabilities		265,714			237,631
Accrued dividends and distributions		—			51,210
Acquired below market leases, net		89,018			93,250
Security deposits and prepaid rents		88,111			85,775
Total liabilities		3,498,272			3,274,820
Commitments and contingencies
Equity:
Stockholders Equity:
Preferred Stock: $0.01 par value, 30,000,000 authorized:
Series C Cumulative Convertible Preferred Stock, 4.375%, $167,499 and $174,999 liquidation preference, respectively ($25.00 per share), 6,699,955 and 6,999,955 shares issued and outstanding as of March 31, 2011 and December 31, 2010, respectively		161,822			169,067
Series D Cumulative Convertible Preferred Stock, 5.500%, $341,120 and $344,683 liquidation preference, respectively ($25.00 per share), 13,644,790 and 13,787,300 shares issued and outstanding as of March 31, 2011 and December 31, 2010, respectively		329,829			333,274
Common Stock: $0.01 par value, 145,000,000 authorized, 92,078,429 and 91,159,221 shares issued and outstanding as of March 31, 2011 and December 31, 2010, respectively		917			909
Additional paid-in capital		1,854,424			1,849,497
Dividends in excess of earnings		(379,627	)		(348,148	)
Accumulated other comprehensive loss, net		(23,570	)		(42,081	)
Total stockholders’ equity		1,943,795			1,962,518
Noncontrolling Interests:
Noncontrolling interests in operating partnership		55,669			52,436
Noncontrolling interests in consolidated joint ventures		39,609			39,709
Total noncontrolling interests		95,278			92,145
Total equity		2,039,073			2,054,663
Total liabilities and equity	$	5,537,345		$	5,329,483

See accompanying notes to the condensed consolidated financial statements.

5

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except share and per share data)

	Three Months Ended March 31,
	2011			2010
Operating Revenues:
Rental	$	196,795		$	151,306
Tenant reimbursements		51,834			39,059
Construction management		1,817			1,414
Other		295			—
Total operating revenues		250,741			191,779
Operating Expenses:
Rental property operating and maintenance		71,723			52,595
Property taxes		13,471			12,721
Insurance		2,051			1,735
Construction management		1,737			647
Depreciation and amortization		73,918			57,532
General and administrative		12,405			10,519
Transactions		681			833
Other		90			2
Total operating expenses		176,076			136,584
Operating income		74,665			55,195
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures		1,208			1,978
Interest and other income		264			31
Interest expense		(36,082	)		(30,902	)
Tax expense		(428	)		(716	)
Loss from early extinguishment of debt		(615	)		—
Net income		39,012			25,586
Net income attributable to noncontrolling interests		(1,510	)		(741	)
Net income attributable to Digital Realty Trust, Inc.		37,502			24,845
Preferred stock dividends		(6,522	)		(10,101	)
Net income available to common stockholders	$	30,980		$	14,744
Net income per share available to common stockholders:
Basic	$	0.34		$	0.19
Diluted	$	0.33		$	0.18
Weighted average common shares outstanding:
Basic		91,428,355			77,770,691
Diluted		92,600,215			80,742,110

See accompanying notes to the condensed consolidated financial statements.

6

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF EQUITY

(unaudited, in thousands, except share data)

	Preferred Stock			Number of Common Shares		Common Stock		Additional Paid-in Capital			Accumulated Dividends in Excess of Earnings			Accumulated Other Comprehensive Loss, net			Total Stockholders’ Equity			Noncontrolling Interests in Operating Partnership			Noncontrolling Interests in Consolidated Joint Ventures			Total Noncontrolling Interests			Total Equity
Balance as of December 31, 2010	$	502,341			91,159,221	$	909	$	1,849,497		$	(348,148	)	$	(42,081	)	$	1,962,518		$	52,436		$	39,709		$	92,145		$	2,054,663
Conversion of units to common stock		—			164,176		2		1,813			—			—			1,815			(1,815	)		—			(1,815	)		—
Issuance of restricted stock, net of forfeitures		—			84,204		—		—			—			—			—			—			—			—			—
Net proceeds from sale of common stock		—			98,100		1		5,596			—			—			5,597			—			—			—			5,597
Exercise of stock options		—			23,232		—		866			—			—			866			—			—			—			866
Issuance of common stock in exchange for debentures		—			303,073		3		(11,480	)		—			—			(11,477	)		—			—			—			(11,477	)
Conversion of preferred stock		(10,690	)		246,423		2		10,688			—			—			—			—			—			—			—
Amortization of unearned compensation regarding share based awards		—			—		—		3,647			—			—			3,647			—			—			—			3,647
Reclassification of vested share based awards		—			—		—		(6,203	)		—			—			(6,203	)		6,203			—			6,203			—
Dividends declared on preferred stock		—			—		—		—			(6,522	)		—			(6,522	)					—			—			(6,522	)
Dividends and distributions on common stock and common and incentive units		—			—		—		—			(62,459	)		—			(62,459	)		(3,793	)		—			(3,793	)		(66,252	)
Contributions from noncontrolling interests in consolidated joint ventures		—			—		—		—			—			—			—			—			42			42			42
Net income		—			—		—		—			37,502			—			37,502			1,652			(142	)		1,510			39,012
Other comprehensive income - foreign currency translation adjustments		—			—		—		—			—			15,576			15,576			830			—			830			16,406
Other comprehensive income - fair value of interest rate swaps		—			—		—		—			—			1,430			1,430			76			—			76			1,506
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense		—			—		—		—			—			1,505			1,505			80			—			80			1,585
Balance as of March 31, 2011	$	491,651			92,078,429	$	917	$	1,854,424		$	(379,627	)	$	(23,570	)	$	1,943,795		$	55,669		$	39,609		$	95,278		$	2,039,073

See accompanying notes to the condensed consolidated financial statements.

7

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three months ended March 31,
	2011			2010
Net income	$	39,012		$	25,586
Other comprehensive income (loss):
Foreign currency translation adjustments		16,406			(18,287	)
Increase (decrease) in fair value of interest rate swaps		1,506			(4,276	)
Reclassification to interest expense from interest rate swaps		1,585			1,659
Comprehensive income		58,509			4,682
Comprehensive (income) loss attributable to noncontrolling interests		(2,496	)		553
Comprehensive income attributable to Digital Realty Trust, Inc.	$	56,013		$	5,235

See accompanying notes to the condensed consolidated financial statements.

8

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Three Months Ended March 31,
	2011			2010
Cash flows from operating activities:
Net income	$	39,012		$	25,586
Adjustments to reconcile net income to net cash provided by operating activities
Loss on early extinguishment of debt-non cash portion		519			—
Equity in earnings of unconsolidated joint ventures		(1,208	)		(1,978	)
Distributions from unconsolidated joint ventures		1,000			1,000
Write-off of net assets due to early lease terminations		90			2
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases		57,559			46,025
Amortization of share-based unearned compensation		3,022			2,695
Allowance for (recovery of) doubtful accounts		(919	)		106
Amortization of deferred financing costs		2,451			2,406
Write-off of deferred financing costs, included in net loss on early extinguishment of debt		79			—
Amortization of debt discount/premium		786			1,095
Amortization of acquired in place lease value and deferred leasing costs		16,359			11,507
Amortization of acquired above market leases and acquired below market leases, net		(1,814	)		(2,283	)
Changes in assets and liabilities:
Restricted cash		381			(1,734	)
Accounts and other receivables		(5,841	)		(9,415	)
Deferred rent		(12,749	)		(11,111	)
Deferred leasing costs		(4,591	)		(5,132	)
Other assets		(10,730	)		(8,179	)
Accounts payable and other accrued liabilities		(20,289	)		(746	)
Security deposits and prepaid rents		1,372			7,356
Net cash provided by operating activities		64,489			57,200
Cash flows from investing activities:
Acquisitions of properties		—			(375,000	)
Investment in unconsolidated joint ventures		(119	)		—
Deposits paid for acquisitions of properties		(1,294	)		—
Receipt of value added tax refund		1,201			916
Refundable value added tax paid		(1,009	)		(1,115	)
Change in restricted cash		(67	)		(588	)
Improvements to investments in real estate		(135,110	)		(66,877	)
Improvement advances to tenants		(1,346	)		(114	)
Collection of advances from tenants for improvements		187			23
Net cash used in investing activities		(137,557	)		(442,755	)

See accompanying notes to the condensed consolidated financial statements.

9

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Three Months Ended March 31,
	2011			2010
Cash flows from financing activities:
Borrowings on revolving credit facility	$	260,873		$	270,000
Repayments on revolving credit facility		(382,500	)		(475,547	)
Borrowings on unsecured senior notes		—			117,000
Borrowings on 5.875% unsecured senior notes due 2020		—			491,480
Borrowings on 5.250% unsecured senior notes due 2021		399,100			—
Principal payments on mortgage loans		(3,900	)		(3,255	)
Principal repayments on 2026 exchangeable senior debentures		(35,850	)		—
Equity component settled associated with exchange of 2026 exchangeable senior debentures		(11,783	)		—
Change in restricted cash		625			(13	)
Payment of loan fees and costs		(3,369	)		(4,944	)
Capital contributions received from noncontrolling interests in joint ventures		42			52
Gross proceeds from the sale of common stock		5,734			55,601
Common stock offering costs paid		(137	)		(977	)
Proceeds from exercise of stock options		866			1,895
Payment of dividends to preferred stockholders		(6,522	)		(10,101	)
Payment of dividends to common stockholders and distributions to noncontrolling interests in operating partnership		(117,462	)		(77,147	)
Net cash provided by financing activities		105,717			364,044
Net increase (decrease) in cash and cash equivalents		32,649			(21,511	)
Cash and cash equivalents at beginning of period		11,719			72,320
Cash and cash equivalents at end of period	$	44,368		$	50,809
Supplemental disclosure of cash flow information:
Cash paid for interest, including amounts capitalized	$	45,208		$	22,231
Cash paid for taxes		87			174
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	$	16,406		$	(18,287	)
Decrease (increase) in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps		1,506			(4,276	)
Noncontrolling interests in operating partnership redeemed for or converted to shares of common stock		1,815			1,711
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses		134,693			71,527
Issuance of common stock in exchange of 2026 exchangeable senior debentures, net		194			—
Allocation of purchase price of properties/investment in partnership to:
Investments in real estate		—			346,436
Acquired above market leases		—			9,714
Acquired below market leases		—			(26,450	)
Acquired in place lease value and deferred leasing costs		—			45,300
Cash paid for acquisition of properties	$	—		$	375,000

See accompanying notes to the condensed consolidated financial statements.

10

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except unit and per unit data)

	March  31, 2011			December  31, 2010
	(unaudited)
ASSETS
Investments in real estate:
Properties:
Land	$	480,788		$	478,629
Acquired ground leases		6,666			6,374
Buildings and improvements		4,662,458			4,459,047
Tenant improvements		287,440			283,492
Total investments in properties		5,437,352			5,227,542
Accumulated depreciation and amortization		(720,610	)		(660,700	)
Net investments in properties		4,716,742			4,566,842
Investment in unconsolidated joint ventures		17,962			17,635
Net investments in real estate		4,734,704			4,584,477
Cash and cash equivalents		44,368			11,719
Accounts and other receivables, net of allowance for doubtful accounts of $2,331 and $3,250 as of March 31, 2011 and December 31, 2010, respectively		78,992			70,337
Deferred rent		203,708			190,067
Acquired above market leases, net		37,421			40,539
Acquired in place lease value and deferred leasing costs, net		327,625			334,366
Deferred financing costs, net		23,836			22,825
Restricted cash		59,836			60,062
Other assets		26,855			15,091
Total assets	$	5,537,345		$	5,329,483
LIABILITIES AND CAPITAL
Revolving credit facility	$	209,687		$	333,534
Unsecured senior notes, net of discount		1,465,351			1,066,030
Exchangeable senior debentures, net of discount		318,669			353,702
Mortgage loans, net of premiums		1,051,222			1,043,188
Other secured loan		10,500			10,500
Accounts payable and other accrued liabilities		265,714			237,631
Accrued dividends and distributions		—			51,210
Acquired below market leases, net		89,018			93,250
Security deposits and prepaid rents		88,111			85,775
Total liabilities		3,498,272			3,274,820
Commitments and contingencies
Capital:
Partners’ capital:
General Partner:
6,699,955 and 6,999,955 Series C Cumulative Convertible preferred units issued and outstanding, respectively, 13,644,790 and 13,787,300 Series D Cumulative Convertible preferred units issued and outstanding, respectively, all with a $25.00 liquidation preference per preferred unit (liquidation preference of $508,619 and $519,681, respectively)		491,651			502,341
92,078,429 and 91,159,221 common units issued and outstanding, respectively		1,475,714			1,502,258
Limited partners, 3,810,814 and 3,937,827 common units, 1,133,484 and 982,618 profits interest units and 532,510 and 543,004 class C units outstanding as of March 31, 2011 and December 31, 2010, respectively		58,462			56,215
Accumulated other comprehensive loss		(26,363	)		(45,860	)
Total partners’ capital		1,999,464			2,014,954
Noncontrolling interests in consolidated joint ventures		39,609			39,709
Total capital		2,039,073			2,054,663
Total liabilities and capital	$	5,537,345		$	5,329,483

See accompanying notes to the condensed consolidated financial statements.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except unit and per unit data)

	Three Months Ended March 31,
	2011			2010
Operating Revenues:
Rental	$	196,795		$	151,306
Tenant reimbursements		51,834			39,059
Construction management		1,817			1,414
Other		295			—
Total operating revenues		250,741			191,779
Operating Expenses:
Rental property operating and maintenance		71,723			52,595
Property taxes		13,471			12,721
Insurance		2,051			1,735
Construction management		1,737			647
Depreciation and amortization		73,918			57,532
General and administrative		12,405			10,519
Transactions		681			833
Other		90			2
Total operating expenses		176,076			136,584
Operating income		74,665			55,195
Other Income (Expenses):
Equity in earnings of unconsolidated joint ventures		1,208			1,978
Interest and other income		264			31
Interest expense		(36,082	)		(30,902	)
Tax expense		(428	)		(716	)
Loss from early extinguishment of debt		(615	)		—
Net income		39,012			25,586
Net loss attributable to noncontrolling interests in consolidated joint ventures		142			232
Net income attributable to Digital Realty Trust, L.P.		39,154			25,818
Preferred units distributions		(6,522	)		(10,101	)
Net income available to common unitholders	$	32,632		$	15,717
Net income per unit available to common unitholders:
Basic	$	0.34		$	0.19
Diluted	$	0.33		$	0.18
Weighted average common units outstanding:
Basic		96,302,608			83,233,100
Diluted		97,474,468			86,204,519

See accompanying notes to the condensed consolidated financial statements.

12

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF CAPITAL

(unaudited, in thousands, except unit data)

	General Partner											Limited Partners						Accumulated Other Comprehensive Loss			Noncontrolling Interests in Consolidated Joint Ventures
	Preferred Units						Common Units					Common Units
	Units			Amount			Units		Amount			Units			Amount									Total Capital
Balance as of December 31, 2010		20,787,255		$	502,341			91,159,221	$	1,502,258			5,463,449		$	56,215		$	(45,860	)	$	39,709		$	2,054,663
Conversion of limited partner common units to general partner common units		—			—			164,176		1,815			(164,176	)		(1,815	)		—			—			—
Issuance of restricted common units, net of forfeitures		—			—			84,204		—			—			—			—			—			—
Net proceeds from issuance of common units		—			—			98,100		5,597			—			—			—			—			5,597
Issuance of common units in connection with the exercise of stock options		—			—			23,232		866			—			—			—			—			866
Issuance of common units		—			—			—		—			177,535			—			—			—			—
Issuance of common units in exchange for debentures		—			—			303,073		(11,477	)		—			—			—			—			(11,477	)
Conversion of preferred units		(442,510	)		(10,690	)		246,423		10,690			—			—			—			—			—
Amortization of unearned compensation regarding share based awards		—			—			—		3,647			—			—			—			—			3,647
Reclassification of vested share based awards		—			—			—		(6,203	)		—			6,203			—			—			—
Distributions		—			(6,522	)		—		(62,459	)		—			(3,793	)		—			—			(72,774	)
Contributions from noncontrolling interests in consolidated joint ventures		—			—			—		—			—			—			—			42			42
Net income		—			6,522			—		30,980			—			1,652			—			(142	)		39,012
Other comprehensive income - foreign currency translation adjustments		—			—			—		—			—			—			16,406			—			16,406
Other comprehensive income - fair value of interest rate swaps		—			—			—		—			—			—			1,506			—			1,506
Other comprehensive income - reclassification of accumulated other comprehensive loss to interest expense		—			—			—		—			—			—			1,585			—			1,585
Balance as of March 31, 2011		20,344,745		$	491,651			92,078,429	$	1,475,714			5,476,808		$	58,462		$	(26,363	)	$	39,609		$	2,039,073

See accompanying notes to the condensed consolidated financial statements.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(unaudited, in thousands, except unit data)

	Three months ended March 31,
	2011		2010
Net income	$	39,012	$	25,586
Other comprehensive income (loss):
Foreign currency translation adjustments		16,406		(18,287	)
Increase (decrease) in fair value of interest rate swaps		1,506		(4,276	)
Reclassification to interest expense from interest rate swaps		1,585		1,659
Comprehensive income	$	58,509	$	4,682

See accompanying notes to the condensed consolidated financial statements.

14

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Three Months Ended March 31,
	2011			2010
Cash flows from operating activities:
Net income	$	39,012		$	25,586
Adjustments to reconcile net income to net cash provided by operating activities
Loss on early extinguishment of debt-non cash portion		519			—
Equity in earnings of unconsolidated joint ventures		(1,208	)		(1,978	)
Distributions from unconsolidated joint ventures		1,000			1,000
Write-off of net assets due to early lease terminations		90			2
Depreciation and amortization of buildings and improvements, tenant improvements and acquired ground leases		57,559			46,025
Amortization of share-based unearned compensation		3,022			2,695
Allowance for (recovery of) doubtful accounts		(919	)		106
Amortization of deferred financing costs		2,451			2,406
Write-off of deferred financing costs, included in net loss on early extinguishment of debt		79			—
Amortization of debt discount/premium		786			1,095
Amortization of acquired in place lease value and deferred leasing costs		16,359			11,507
Amortization of acquired above market leases and acquired below market leases, net		(1,814	)		(2,283	)
Changes in assets and liabilities:					—
Restricted cash		381			(1,734	)
Accounts and other receivables		(5,841	)		(9,415	)
Deferred rent		(12,749	)		(11,111	)
Deferred leasing costs		(4,591	)		(5,132	)
Other assets		(10,730	)		(8,179	)
Accounts payable and other accrued liabilities		(20,289	)		(746	)
Security deposits and prepaid rents		1,372			7,356
Net cash provided by operating activities		64,489			57,200
Cash flows from investing activities:
Acquisitions of properties		—			(375,000	)
Investment in unconsolidated joint ventures		(119	)		—
Deposits paid for acquisitions of properties		(1,294	)		—
Receipt of value added tax refund		1,201			916
Refundable value added tax paid		(1,009	)		(1,115	)
Change in restricted cash		(67	)		(588	)
Improvements to investments in real estate		(135,110	)		(66,877	)
Improvement advances to tenants		(1,346	)		(114	)
Collection of advances from tenants for improvements		187			23
Net cash used in investing activities		(137,557	)		(442,755	)

See accompanying notes to the condensed consolidated financial statements.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)

(unaudited, in thousands)

	Three Months Ended March 31,
	2011			2010
Cash flows from financing activities:
Borrowings on revolving credit facility	$	260,873		$	270,000
Repayments on revolving credit facility		(382,500	)		(475,547	)
Borrowings on unsecured senior notes		—			117,000
Borrowings on 5.875% unsecured senior notes due 2020		—			491,480
Borrowings on 5.250% unsecured senior notes due 2021		399,100			—
Principal payments on mortgage loans		(3,900	)		(3,255	)
Principal repayments on 2026 exchanagable senior debentures		(35,850	)		—
Equity component settled associated with exchange of 2026 exchangeable senior debentures		(11,783	)		—
Change in restricted cash		625			(13	)
Payment of loan fees and costs		(3,369	)		(4,944	)
Capital contributions received from noncontrolling interests in joint ventures		42			52
General partner contributions		6,463			56,519
Payment of distributions to preferred unitholders		(6,522	)		(10,101	)
Payment of distributions to common unitholders		(117,462	)		(77,147	)
Net cash provided by financing activities		105,717			364,044
Net increase (decrease) in cash and cash equivalents		32,649			(21,511	)
Cash and cash equivalents at beginning of period		11,719			72,320
Cash and cash equivalents at end of period	$	44,368		$	50,809
Supplemental disclosure of cash flow information:
Cash paid for interest, including amounts capitalized	$	45,208		$	22,231
Cash paid for taxes		87			174
Supplementary disclosure of noncash investing and financing activities:
Change in net assets related to foreign currency translation adjustments	$	16,406		$	(18,287	)
Decrease (increase) in accounts payable and other accrued liabilities related to change in fair value of interest rate swaps		1,506			(4,276	)
Accrual for additions to investments in real estate and tenant improvement advances included in accounts payable and accrued expenses		134,693			71,527
Issuance of common stock in exchange of 2026 exchangeable senior debentures, net		194			—
Allocation of purchase price of properties/investment in partnership to:
Investments in real estate		—			346,436
Other assets		—			—
Acquired above market leases		—			9,714
Acquired below market leases		—			(26,450	)
Acquired in place lease value and deferred leasing costs		—			45,300
Cash paid for acquisition of properties	$	—		$	375,000

See accompanying notes to the condensed consolidated financial statements.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2011 and 2010

(unaudited)

1. Organization and Description of Business

Digital Realty Trust, Inc. through its controlling interest in Digital Realty Trust, L.P. (the Operating Partnership) and the subsidiaries of the Operating Partnership (collectively, we, our, us or the Company) is engaged in the business of owning, acquiring, developing, redeveloping and managing technology-related real estate. The Company is focused on providing Turn-Key Datacenter^® and Powered Base Building^® datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and Internet enterprises, to manufacturing and financial services. As of March 31, 2011, our portfolio consisted of 96 properties, excluding two properties held as investments in unconsolidated joint ventures, of which 81 are located throughout North America, 14 are located in Europe and one is located in Asia. Our properties are diversified in major markets where corporate datacenter and technology tenants are concentrated, including the Boston, Chicago, Dallas, Los Angeles, New York Metro, Northern Virginia, Phoenix, San Francisco and Silicon Valley metropolitan areas in the U.S., the Amsterdam, Dublin, London and Paris markets in Europe and Singapore in Asia. The portfolio consists of Internet gateway and corporate datacenter properties, technology manufacturing properties and regional or national headquarters of technology companies.

The Operating Partnership was formed on July 21, 2004 in anticipation of our initial public offering (IPO) on November 3, 2004 and commenced operations on that date. As of March 31, 2011, we own a 94.4% common interest and a 100% preferred interest in the Operating Partnership. As sole general partner, we have control over the Operating Partnership. The limited partners of the Operating Partnership do not have rights to replace us as the general partner nor do they have participating rights, although they do have certain protective rights.

2. Summary of Significant Accounting Policies

(a) Principles of Consolidation and Basis of Presentation

The accompanying interim condensed consolidated financial statements include all of the accounts of Digital Realty Trust, Inc., the Operating Partnership and the subsidiaries of the Operating Partnership. Intercompany balances and transactions have been eliminated.

The accompanying interim condensed consolidated financial statements are unaudited, but have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for interim financial information and in compliance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments necessary for a fair presentation have been included. All such adjustments are considered to be of a normal recurring nature, except as otherwise indicated. The results of operations for the interim periods are not necessarily indicative of the results to be obtained for the full fiscal year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

The notes to the condensed consolidated financial statements of Digital Realty Trust, Inc. and the Operating Partnership have been combined to provide the following benefits:

• enhancing investors’ understanding of the Company and the Operating Partnership by enabling investors to view the business as a whole in the same manner as management views and operates the business;

• eliminating duplicative disclosure and providing a more streamlined and readable presentation since a substantial portion of the disclosure applies to both the Company and the Operating Partnership; and

• creating time and cost efficiencies through the preparation of one set of notes instead of two separate sets of notes.

There are few differences between the Company and the Operating Partnership, which are reflected in these condensed consolidated financial statements. We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how Digital Realty Trust, Inc. and the Operating Partnership operate as an interrelated consolidated company. Digital Realty Trust, Inc.’s only material asset is its ownership of partnership interests of the Operating Partnership. As a result, Digital Realty Trust, Inc. does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing certain unsecured debt of the Operating Partnership. Digital Realty Trust, Inc. itself does not hold any indebtedness but guarantees some of the unsecured debt of the Operating Partnership, as disclosed in these notes. The Operating Partnership holds substantially all the assets of the Company and holds the ownership interests in the Company’s joint ventures. The Operating Partnership conducts the operations of the business and is structured as a

17

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

partnership with no publicly traded equity. Except for net proceeds from public equity issuances by Digital Realty Trust, Inc., which are generally contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s direct or indirect incurrence of indebtedness or through the issuance of partnership units.

The presentation of noncontrolling interests in operating partnership, stockholder’s equity and partners’ capital are the main areas of difference between the condensed consolidated financial statements of Digital Realty Trust, Inc. and those of the Operating Partnership. The common limited partnership interests held by the limited partners in the Operating Partnership are presented as limited partners’ capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in operating partnership within equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The common and preferred partnership interests held by Digital Realty Trust, Inc. in the Operating Partnership are presented as general partner’s capital within partners’ capital in the Operating Partnership’s condensed consolidated financial statements and as preferred stock, common stock, additional paid-in capital and accumulated dividends in excess of earnings within stockholders’ equity in Digital Realty Trust, Inc.’s condensed consolidated financial statements. The differences in the presentations between stockholders’ equity and partners’ capital result from the differences in the equity issued at the Digital Realty Trust, Inc. and the Operating Partnership levels.

To help investors understand the significant differences between the Company and the Operating Partnership, these condensed consolidated financial statements present the following separate sections for each of the Company and the Operating Partnership:

• condensed consolidated face financial statements; and

• the following notes to the condensed consolidated financial statements:

• Debt;

• Equity of the Company and Capital of the Operating Partnership; and

• Income per Share and Income per Unit.

In the sections that combine disclosure of Digital Realty Trust, Inc. and the Operating Partnership, these notes refer to actions or holdings as being actions or holdings of the Company. Although the Operating Partnership is generally the entity that enters into contracts and joint ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Company operates the business through the Operating Partnership.

(b) Cash Equivalents

For the purpose of the condensed consolidated statements of cash flows, we consider short-term investments with original maturities of 90 days or less to be cash equivalents. As of March 31, 2011, cash equivalents consist of investments in money market instruments.

(c) Share Based Compensation

We account for share based compensation using the fair value method of accounting. The estimated fair value of the stock options granted by us is being amortized on a straight-line basis over the vesting period of the stock options. The estimated fair value of the long-term incentive units and Class C Units (discussed in note 12(b)) granted by us is being amortized on a straight-line basis over the expected service period.

For share based compensation awards with performance conditions, we estimate the fair value of the award for each of the possible performance condition outcomes and amortize the compensation cost based on management’s projected performance outcome. In the instance management’s projected performance outcome changes prior to the final measurement date, compensation cost is adjusted accordingly.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

(d) Income Taxes

Digital Realty Trust, Inc. (the Parent Company) has elected to be treated and believes that it has been organized and has operated in a manner that has enabled the Parent Company to qualify as a REIT for federal income tax purposes. As a REIT, the Parent Company generally is not required to pay federal corporate income taxes on its taxable income to the extent it is currently distributed to its stockholders.

However, qualification and taxation as a REIT depend upon the Parent Company’s ability to meet the various qualification tests imposed under the Internal Revenue Code of 1986, as amended (the Code), including tests related to annual operating results, asset composition, distribution levels and diversity of stock ownership. Accordingly, no assurance can be given that the Parent Company has been organized or has operated or will continue to operate in a manner so as to qualify or remain qualified as a REIT. If the Parent Company fails to qualify as a REIT in any taxable year, it will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.

The Operating Partnership is a partnership and is not required to pay federal income tax. Instead, taxable income is allocated to its partners, who include such amounts on their federal income tax returns. As such, no provision for federal income taxes has been included in the Operating Partnership’s accompanying condensed consolidated financial statements.

Even if the Parent Company and the Operating Partnership are not subject to federal income taxes, they are taxed in certain states in which they operate. The Company is also taxed in non-U.S. countries where it operates that do not recognize U.S. REITs under their respective tax laws. The Company’s consolidated taxable REIT subsidiary is subject to both federal and state income taxes to the extent there is taxable income. Accordingly, the Company recognizes and accrues income taxes for its taxable REIT subsidiary, certain states and non-U.S. jurisdictions, as appropriate.

We assess our significant tax positions in accordance with U.S. GAAP for all open tax years and determine whether we have any material unrecognized liabilities from uncertain tax benefits. If a tax position is not considered “more-likely-than-not” to be sustained solely on its technical merits, no benefits of the tax position are to be recognized (for financial statement purposes). As of March 31, 2011 and December 31, 2010, we have no assets or liabilities for uncertain tax positions. We classify interest and penalties from significant uncertain tax positions as interest expense and operating expense, respectively, in our condensed consolidated statements of operations. For the three months ended March 31, 2011 and 2010, we had no such interest or penalties. The tax years 2007 through 2010 remain open to examination by the major taxing jurisdictions with which the Parent Company and its subsidiaries file tax returns.

See Note 9 for further discussion on income taxes.

(e) Presentation of Transactional-based Taxes

We account for transactional-based taxes, such as value added tax, or VAT, for our international properties on a net basis.

(f) Asset Retirement Obligations

We record accruals for estimated retirement obligations as required by current accounting guidance. The amount of asset retirement obligations relates primarily to estimated asbestos removal costs at the end of the economic life of properties that were built before 1984. As of March 31, 2011 and December 31, 2010, the amount included in accounts payable and other accrued liabilities on our condensed consolidated balance sheets was approximately $1.3 million.

(g) Assets and Liabilities Measured at Fair Value

Fair value under U.S. GAAP is a market-based measurement, not an entity-specific measurement. Therefore, our fair value measurements are determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair-value measurements, we use a fair-value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy).

Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access. Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals. Level 3 inputs are unobservable inputs for the asset or liability, which are typically based on an entity’s own assumptions, as there is little, if any, related market activity. In instances where the determination of the fair-value measurement is based on inputs from different levels of the fair-value hierarchy, the level in the fair-value hierarchy within which the entire fair-value measurement falls is based on the lowest level input that is significant to the fair-value measurement in its entirety. Our assessment of the significance of a particular input to the fair-value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

(h) Construction Management Revenue

Construction management revenue is recognized under the percentage-of-completion method of accounting. Revenues are determined by measuring the percentage of costs incurred to date to estimated total costs for each construction management contract based on current estimates of costs to complete. Contract costs include all labor and benefits, materials, subcontracts, and an allocation of indirect costs related to contract performance. Indirect costs are allocated to projects based upon labor hours charged. As long-term design-build projects extend over one or more years, revisions in cost and estimated earnings during the course of the work are reflected in the accounting period in which the facts which require the revision become known. At the time a loss on a design-build project becomes known, the entire amount of the estimated ultimate loss is recognized in the condensed consolidated financial statements. Change orders are recognized when they are approved by the client.

Costs and estimated earnings in excess of billings on uncompleted construction management projects are included in other assets in the condensed consolidated balance sheets. Billings in excess of costs and estimated earnings on uncompleted construction management projects are included in accounts payable and accrued liabilities in the condensed consolidated balance sheets. Customers are billed on a monthly basis at the end of each month, which can be in advance of work performed. As a result, we typically generate billings in excess of costs and estimated earnings on construction management projects.

(i) Transactions Expense

Transactions expense includes acquisition-related expenses and other business development expenses, which are expensed as incurred. Acquisition-related expenses include closing costs, broker commissions and other professional fees, including legal and accounting fees related to acquisitions and potential acquisitions.

(j) Management’s Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates made. On an on-going basis, we evaluate our estimates, including those related to acquiring, developing and assessing the carrying values of our real estate properties, accrued liabilities, performance-based equity compensation plans, and Digital Realty Trust, Inc.’s qualification as a REIT. We base our estimates on historical experience, current market conditions, and various other assumptions that are believed to be reasonable under the circumstances. Actual results may vary from those estimates and those estimates could vary under different assumptions or conditions.

(k) Segment Information

All of our properties generate similar revenues and expenses related to tenant rent and reimbursements and operating expenses. The delivery of our products is consistent across all properties and although services are provided to a wide range of customers, the types of services provided to them are limited to a few core principles. As such, the properties in our portfolio have similar economic characteristics and the nature of the products and services provided to our customers and the method to distribute such services are consistent throughout the portfolio. Consequently, our properties qualify for aggregation into one reporting segment.

(l) Reclassifications

Certain reclassifications to prior year amounts have been made to conform to the current year presentation. During the three months ended March 31, 2010, $1.4 million was reclassified from rental revenue to construction management revenue and $0.6 million was reclassified from rental property operating and maintenance expense to construction management expense.

3. Acquisitions

We acquired no real estate properties during the three months ended March 31, 2011.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

4. Acquired Intangible Assets and Liabilities

The following summarizes our acquired intangible assets (acquired in place lease value and acquired above-market lease value) and intangible liabilities (acquired below-market lease value) as of March 31, 2011 and December 31, 2010.

	Balance as of
(Amounts in thousands)	March 31, 2011			December 31, 2010
Acquired in place lease value:
Gross amount	$	517,698		$	515,958
Accumulated amortization		(277,074	)		(261,978	)
Net	$	240,624		$	253,980
Acquired above-market lease value:
Gross amount	$	87,974		$	87,622
Accumulated amortization		(50,553	)		(47,083	)
Net	$	37,421		$	40,539
Acquired below-market lease value:
Gross amount	$	191,370		$	189,990
Accumulated amortization		(102,352	)		(96,740	)
Net	$	89,018		$	93,250

Amortization of acquired below-market lease value, net of acquired above-market lease value, resulted in an increase to rental revenues of $1.8 million and $2.3 million for the three months ended March 31, 2011 and 2010, respectively. The expected average

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

remaining lives for acquired below-market leases and acquired above-market leases is 5.0 years and 3.8 years, respectively, as of March 31, 2011. Estimated annual amortization of acquired below-market lease value, net of acquired above-market lease value, for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	6,520
2013		7,090
2014		5,729
2015		5,060
2016		4,180

Costs associated with extending or renewing acquired leases are capitalized as exercised and classified as deferred leasing cost. Amortization of acquired in place lease value (a component of depreciation and amortization expense) was $14.3 million and $9.9 million for the three months ended March 31, 2011 and 2010, respectively. The expected average amortization period for acquired in place lease value is 4.7 years as of March 31, 2011. The weighted average period prior to the next renewal of extension related to remaining contractual life for acquired leases is 4.1 years as of March 31, 2011. Estimated annual amortization of acquired in place lease value for each of the five succeeding years, commencing January 1, 2012 is as follows:

(Amounts in thousands)
2012	$	42,254
2013		37,890
2014		32,970
2015		24,730
2016		16,348

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

5. Debt of the Company

In this Note 5, the “Company” refers only to Digital Realty Trust, Inc. and not to any of its subsidiaries.

The Company itself does not have any indebtedness. All debt is held directly or indirectly by the Operating Partnership.

Guarantee of Debt

The Company has guaranteed some of the Operating Partnership’s debt. The Company guarantees the Operating Partnership’s obligations with respect to the 2026 Debentures, the 2029 Debentures, the 2015 Notes, the 2020 Notes, the 2021 Notes (each, as defined in Note 6) and its unsecured senior notes sold to Prudential pursuant to the Prudential shelf facility. The Company is also the guarantor of the Operating Partnership’s obligations under its revolving credit facility.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

6. Debt of the Operating Partnership

A summary of outstanding indebtedness of the Operating Partnership as of March 31, 2011 and December 31, 2010, respectively, is as follows (in thousands):

Indebtedness	Interest Rate at March 31, 2011		Maturity Date		Principal Outstanding March 31, 2011			Principal Outstanding December 31, 2010
Revolving credit facility		Various (1)		Aug. 31, 2011 (2)	$	209,687	(3)	$	333,534	(3)
Unsecured senior notes:
Prudential Shelf Facility:
Series A		7.000%		Jul. 24, 2011		25,000			25,000
Series B		9.320%		Nov. 5, 2013		33,000			33,000
Series C		9.680%		Jan. 6, 2016		25,000			25,000
Series D		4.570%		Jan. 20, 2015		50,000			50,000
Series E		5.730%		Jan. 20, 2017		50,000			50,000
Series F		4.500%		Feb. 3, 2015		17,000			17,000
Total Prudential Shelf Facility						200,000			200,000
Senior Notes:
4.50% notes due 2015		4.500%		Jul. 15, 2015		375,000			375,000
5.875% notes due 2020		5.875%		Feb. 1, 2020		500,000			500,000
5.250% notes due 2021		5.250%		Mar. 15, 2021		400,000			—
Unamortized discounts						(9,649	)		(8,970	)
Total senior notes, net of discount						1,265,351			866,030
Total unsecured senior notes, net of discount						1,465,351			1,066,030
Exchangeable senior debentures:
4.125% exchangeable senior debentures due 2026		4.125%		Aug. 15, 2026 (4)		52,908			88,758
5.50% exchangeable senior debentures due 2029		5.50%		Apr. 15, 2029 (5)		266,400			266,400
Unamortized discount						(639	)		(1,456	)
Total exchangeable senior debentures, net of discount						318,669			353,702

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

Indebtedness	Interest Rate at March  31, 2011		Maturity Date		Principal Outstanding March 31, 2011			Principal Outstanding December 31, 2010
Mortgage loans:
Secured Term Debt (6)(7)		5.65%		Nov. 11, 2014		140,840			141,465
3 Corporate Place (7)(8)		6.72%		Aug. 1, 2011 (9)		80,000			80,000
200 Paul Avenue 1-4 (7)		5.74%		Oct. 8, 2015		75,743			76,179
2045 & 2055 LaFayette Street (7)		5.93%		Feb. 6, 2017		66,207			66,437
Mundells Roundabout		3-month GBP LIBOR + 1.20% (10)		Nov. 30, 2013		68,640	(11)		66,858	(11)
600 West Seventh Street		5.80%		Mar. 15, 2016		53,803			54,157
34551 Ardenwood Boulevard 1-4 (7)		5.95%		Nov. 11, 2016		54,129			54,306
1100 Space Park Drive (7)		5.89%		Dec. 11, 2016		54,118			54,296
1350 Duane Avenue/3080 Raymond Street (7)		5.42%		Oct. 1, 2012		52,800			52,800
150 South First Street (7)		6.30%		Feb. 6, 2017		51,985			52,154
114 Rue Ambroise Croizat		3-month EURIBOR + 1.35% (10)		Jan. 18, 2012		43,652	(12)		41,430	(12)
Clonshaugh Industrial Estate II (8)		3-month EURIBOR + 4.50% (10)		Sep. 4, 2014		42,474	(12)		40,152	(12)
1500 Space Park Drive (7)		6.15%		Oct. 5, 2013		39,428			39,941
2334 Lundy Place (7)		5.96%		Nov. 11, 2016		39,367			39,496
Unit 9, Blanchardstown Corporate Park		3-month EURIBOR + 1.35% (10)		Jan. 18, 2012		37,530	(12)		35,620	(12)
Cressex 1 (14)		5.68%		Oct. 16, 2014		29,021	(11)		28,388	(11)
6 Braham Street (8)		3-month GBP LIBOR + 0.90% (10)		Apr. 10, 2011		19,875	(11)(16)		19,515	(11)
1201 Comstock Street (7)(8)		1-month LIBOR + 3.50% (10)		Jun. 24, 2012 (2)		16,777			16,976
Datacenter Park — Dallas		5.00%		Sep. 15, 2011 (2)		16,150			16,150
Paul van Vlissingenstraat 16		3-month EURIBOR + 1.60% (10)		Jul. 18, 2013		14,727	(12)		13,978	(12)
Chemin de l’Epinglier 2		3-month EURIBOR + 1.50% (10)		Jul. 18, 2013		10,655	(12)		10,113	(12)
800 Central Expressway (7)		1-month LIBOR + 4.75%		Jun. 9, 2013		10,000			10,000
Gyroscoopweg 2E-2F (13)		3-month EURIBOR + 1.50% (10)		Oct. 18, 2013		9,377	(12)		8,900	(12)
1125 Energy Park Drive (7)		7.62%(15)		Mar. 1, 2032		9,020			9,060
Manchester Technopark (14)		5.68%		Oct. 16, 2014		8,829	(11)		8,636	(11)
731 East Trade Street		8.22%		Jul. 1, 2020		5,014			5,080
Unamortized net premiums						1,061			1,101
Total mortgage loans, net of premiums						1,051,222			1,043,188
Other secured loan:
800 Central Expressway Mezzanine (7)		1-month LIBOR + 8.50%		Jun. 9, 2013		10,500			10,500
Total other secured loan						10,500			10,500
Total indebtedness					$	3,055,429		$	2,806,954

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

(1) The interest rate under our revolving credit facility equals either (i) US LIBOR, EURIBOR and GBP LIBOR (ranging from 1- to 6-month maturities) plus a margin of between 1.10% and 2.00% or (ii) the greater of (x) the base rate announced by the lender and (y) 1/2 of 1% per annum above the federal funds rate, plus a margin of between 0.100%—1.000%. In each case, the margin is based on our total leverage ratio. We incur a fee ranging from 0.125% to 0.20% for the unused portion of our unsecured revolving credit facility.

(2) A one-year extension is available, which we may exercise if certain conditions are met.

(3) Balances as of March 31, 2011 and December 31, 2010 are as follows (balances, in thousands):

Denomination of Draw	Balance as of March 31, 2011			Weighted-average interest rate			Balance as of December 31, 2010			Weighted- average interest rate
US ($)	$	165,000			1.35	%	$	312,500			1.40	%
Euro (€)		7,080	(a)		2.01	%		—			—
British Sterling (£)		37,607	(b)		1.72	%		21,034	(b)		1.69	%
Total	$	209,687			1.44	%	$	333,534			1.42	%

(a) Based on exchange rate of $1.42 to €1.00 as of March 31, 2011.

(b) Based on exchange rate of $1.60 to £1.00 as of March 31, 2011 and $1.56 to £1.00 as of December 31, 2010.

(4) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of August 15, 2011, August 15, 2016 and August 15, 2021. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on August 18, 2011.

(5) The holders of the debentures have the right to require the Operating Partnership to repurchase the debentures in cash in whole or in part for a price of 100% of the principal amount plus accrued and unpaid interest on each of April 15, 2014, April 15, 2019 and April 15, 2024. We have the right to redeem the debentures in cash for a price of 100% of the principal amount plus accrued and unpaid interest commencing on April 18, 2014.

(6) This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

(7) The respective borrower’s assets and credit are not available to satisfy the debts and other obligations of affiliates or any other person.

(8) The Operating Partnership or its subsidiary provides a limited recourse guarantee with respect to this loan.

(9) Two one-year extensions are available, which we may exercise if certain conditions are met.

(10) We have entered into interest rate swap or interest rate cap agreements as a cash flow hedge for interest generated by these US LIBOR, EURIBOR and GBP LIBOR based loans. See note 13 for further information.

(11) Based on exchange rate of $1.60 to £1.00 as of March 31, 2011 and $1.56 to £1.00 as of December 31, 2010.

(12) Based on exchange rate of $1.42 to €1.00 as of March 31, 2011 and $1.34 to €1.00 as of December 31, 2010.

(13) This loan is also secured by a €1.3 million letter of credit.

(14) These loans are also secured by a £7.8 million letter of credit. These loans are cross-collateralized by the two properties.

(15) If the loan is not repaid by March 1, 2012, the interest rate increases to the greater of 9.62% or the treasury rate then in effect plus 2%. Subject to a prepayment lock-out period through December 2011.

(16) This mortgage loan was repaid in full in April 2011.

Revolving Credit Facility

As of March 31, 2011, our revolving credit facility had a total capacity of $750.0 million. Effective August 31, 2010, we exercised the first of two one-year extension options to our revolving credit facility, which extended its maturity date from August 31, 2010 to August 31, 2011. The bank group is obligated to grant extension options provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility. On June 28, 2010, we completed an amendment to our revolving credit facility. The amendment to the revolving credit facility provides us with the ability to add eligible unencumbered international assets to the borrowing base in support of our outstanding unsecured debt. International assets include properties located in Canada, England, Ireland, Wales, France, Spain, the Netherlands, Singapore and Australia. Under the new amendment, international assets may comprise up to 25% of the borrowing base, with assets in Spain and Singapore limited to up to 10% of the borrowing base. As of March 31, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.35% (U.S), 2.01% (Euro) and 1.72% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.10%. The revolving credit facility has a $515.0 million sub-facility for multicurrency advances in British Pounds Sterling, Canadian Dollars, Euros, and Swiss Francs. We intend to use available borrowings under the revolving credit facility to, among other things, finance the acquisition of additional properties, fund tenant improvements and capital expenditures, fund development and redevelopment activities and to provide for working capital and other corporate purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. As of March 31, 2011, approximately $209.7 million was drawn under this facility and $29.9 million of letters of credit were issued.

The credit facility contains various restrictive covenants, including limitations on our ability to incur additional indebtedness, make certain investments or merge with another company, and requirements to maintain financial coverage ratios as well as a pool of unencumbered assets. In addition, a downgrade in Digital Realty Trust, Inc.’s credit rating below investment grade may trigger additional payments or other consequences under our credit facility. In addition, except to enable Digital Realty Trust, Inc. to maintain its status as a REIT for federal income tax purposes or as may otherwise be required to avoid the imposition of income or excise taxes on Digital Reality Trust, Inc., we are not permitted during any four consecutive fiscal quarters to make distributions with respect to common stock or other equity interests in an aggregate amount in excess of 95% of Funds From Operations, as defined in the credit agreement, for such period, subject to certain other adjustments. As of March 31, 2011, we were in compliance with all of such covenants.

26

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

During the three months ended March 31, 2011 and 2010, we capitalized interest of approximately $4.7 million and $1.9 million, respectively.

Unsecured Senior Notes

Prudential Shelf Facility

On January 20, 2010, the Operating Partnership closed the sale of $100.0 million aggregate principal amount of its senior unsecured term notes to Prudential Investment Management, Inc. and certain of its affiliates, or, collectively, Prudential, pursuant to the Prudential shelf facility. The notes were issued in two series referred to as the series D and series E notes. The series D notes have a principal amount of $50.0 million, an interest-only rate of 4.57% per annum and a five-year maturity, and the series E notes have a principal amount of $50.0 million, an interest-only rate of 5.73% per annum and a seven-year maturity. On February 3, 2010, the Operating Partnership closed the sale of an additional $17.0 million aggregate principal amount of its senior unsecured term notes, which we refer to as the series F notes, to Prudential pursuant to the Prudential shelf facility. The series F notes have an interest-only rate of 4.50% per annum and a five-year maturity. We used the proceeds of the series D, series E and series F notes to fund acquisitions, to temporarily repay borrowings under our revolving credit facility, to fund working capital and for general corporate purposes. As of March 31, 2011 and December 31, 2010, there was $200.0 million of unsecured senior notes outstanding. On December 8, 2010, our operating partnership and Prudential entered into an amendment to the Note Purchase and Private Shelf Agreement, increasing the capacity of the Prudential shelf facility from $200.0 million to $250.0 million.

4.500% Notes due 2015

On July 8, 2010, the Operating Partnership issued $375.0 million aggregate principal amount of notes, maturing on July 15, 2015 with an interest rate of 4.500% per annum (the 2015 Notes). The purchase price paid by the initial purchasers was 99.697% of the principal amount. The 2015 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2015 Notes is payable on January 15 and July 15 of each year, beginning on January 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $1.1 million and underwriting commissions and expenses of approximately $3.1 million was approximately $370.8 million. We used the net proceeds from the offering to fund a portion of the purchase price of the 365 Main Portfolio. The 2015 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2015 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At March 31, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2015 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2015 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in October 2010 in connection with the exchange offer, which was declared effective in December 2010. We completed the exchange offer on January 19, 2011.

5.875% Notes due 2020

On January 28, 2010, the Operating Partnership issued $500.0 million aggregate principal amount of notes, maturing on February 1, 2020 with an interest rate of 5.875% per annum (the 2020 Notes). The purchase price paid by the initial purchasers was 98.296% of the principal amount. The 2020 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2020 Notes is payable on February 1 and August 1 of each year, beginning on August 1, 2010. The net proceeds from the offering after deducting the original issue discount of approximately $8.5 million and underwriting commissions and expenses of approximately $4.4 million was approximately $487.1 million. We used the net proceeds from the offering to temporarily repay our borrowings under our revolving credit facility, fund development and redevelopment opportunities and for general corporate purposes. The 2020 Notes have been reflected net of discount in the condensed consolidated balance sheet.

27

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

The indenture governing the 2020 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At March 31, 2011, we were in compliance with each of these financial covenants.

We entered into a registration rights agreement whereby the Operating Partnership agreed to conduct an offer to exchange the 2020 Notes for a new series of publicly registered notes with substantially identical terms. If the Operating Partnership did not fulfill certain of its obligations under the registration rights agreement, it would have been required to pay liquidated damages to the holders of the 2020 Notes. No separate contingent obligation was recorded as no liquidated damages became probable. We filed a registration statement with the U.S. Securities and Exchange Commission in June 2010 in connection with the exchange offer, which was declared effective in September 2010. We completed the exchange offer on November 5, 2010.

5.250% Notes due 2021

On March 8, 2011, the Operating Partnership issued $400.0 million aggregate principal amount of notes, maturing on March 15, 2021 with an interest rate of 5.250% per annum (the 2021 Notes). The purchase price paid by the initial purchasers was 99.775% of the principal amount. The 2021 Notes are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc. Interest on the 2021 Notes is payable on March 15 and September 15 of each year, beginning on September 15, 2011. The net proceeds from the offering after deducting the original issue discount of approximately $0.9 million and underwriting commissions and expenses of approximately $3.6 million was approximately $395.5 million. We used the net proceeds from this offering to temporarily repay borrowings under our revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities. The 2021 Notes have been reflected net of discount in the condensed consolidated balance sheet.

The indenture governing the 2021 Notes contains certain covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40% and (3) an interest coverage ratio of greater than 1.50, and also requires us to maintain total unencumbered assets of not less than 150% of the aggregate principal amount of unsecured debt. At March 31, 2011, we were in compliance with each of these financial covenants.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

Exchangeable Senior Debentures

4.125% Exchangeable Senior Debentures due 2026

On August 15, 2006, the Operating Partnership issued $172.5 million of its 4.125% exchangeable senior debentures due August 15, 2026 (the 2026 Debentures). Costs incurred to issue the 2026 Debentures were approximately $5.4 million, net of the amount allocated to the equity component of the debentures. These costs are being amortized over a period of five years, which represents the estimated term of the 2026 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2026 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on August 15 and February 15 of each year beginning February 15, 2007 until the maturity date of August 15, 2026. The 2026 Debentures bear interest at 4.125% per annum and contain an exchange settlement feature, which provides that the 2026 Debentures may, under certain circumstances, be exchangeable for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 30.6828 shares per $1,000 principal amount of 2026 Debentures. The exchange rate on the 2026 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.265 per share per quarter (the “reference dividend”). Effective December 13, 2010, the exchange rate has been adjusted to 31.8250 shares per $1,000 principal amount of 2026 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended December 31, 2006 and through the quarter ended December 31, 2010.

Prior to August 18, 2011, the Operating Partnership may not redeem the 2026 Debentures except to preserve Digital Realty Trust, Inc.’s status as a REIT for U.S. federal income tax purposes. On or after August 18, 2011, at the Operating Partnership’s option, the 2026 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days’ but not more than 60 days’ prior written notice to holders of the 2026 Debentures.

The holders of the 2026 Debentures have the right to require the Operating Partnership to repurchase the 2026 Debentures in cash in whole or in part on each of August 15, 2011, August 15, 2016 and August 15, 2021, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2026 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.’s capital stock, a substantial turnover of Digital Realty Trust, Inc.’s directors within a 12- month period and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered “Events of Default,” which may result in the accelerated maturity of the 2026 Debentures, including a default for 30 days in payment of any installment of interest under the 2026 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2026 Debentures and the Operating Partnership’s failure to deliver cash or any shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2026 Debentures, together with any cash due in lieu of fractional shares of common stock.

In addition, the 2026 Debentures are exchangeable (i) prior to July 15, 2026, during any fiscal quarter after the fiscal quarter ended September 30, 2006, if the closing sale price of Digital Realty Trust, Inc. common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter exceeds 130% of the exchange price in effect on the last trading day of the immediately preceding fiscal quarter, (ii) prior to July 15, 2026, during the five business day period after any five consecutive trading day period in which the average trading price per $1,000 principal amount of 2026 Debentures was equal to or less than 98% of the product of the closing sale price of the common stock during such period, multiplied by the applicable exchange rate, (iii) if we call the 2026 Debentures for redemption and (iv) any time on or after July 15, 2026. In January 2011, we gave notice to the holders of the 2026 Debentures that the 2026 Debentures shall be exchangeable during the calendar quarter ending March 31, 2011 pursuant to (i) above. The exchange price in effect as of March 31, 2011 was $31.42 per share.

We entered into a registration rights agreement whereby we agreed to register the shares of common stock which could be issued in the future upon exchange of the 2026 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2026 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in April 2007, which was automatically effective upon filing.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

During the three months ended March 31, 2011, we exchanged approximately $35.9 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $47.6 million) and 303,073 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. There were no exchanges of our 2026 Debentures during the three months ended March 31, 2010. As of March 31, 2011, the remaining $52.9 million face amount of the 2026 Debentures remains outstanding under the original terms. We recorded a loss on exchange of approximately $0.6 million for the three months ended March 31, 2011, determined based on the excess of the fair value of the 2026 Debentures at the exchange date over the carrying value of the exchanged 2026 Debentures along with a write off of a pro rata portion of the associated debt discount on the 2026 Debentures and deferred financing costs. This loss is reported as a loss on early extinguishment of debt in the condensed consolidated income statements.

The following table provides additional information about the 2026 Debentures as of the date presented pursuant to requirements under U.S. GAAP for convertible debt instruments that require the principal amount to be settled in cash upon conversion:

	4.125% Exchangeable Senior Debentures due 2026
($ and shares in thousands, except exchange price)	March 31, 2011			December 31, 2010
Carrying amount of the equity component	$	5,607		$	9,406
Principal amount of the liability component	$	52,908		$	88,758
Unamortized discount of the liability component	$	639		$	1,456
Net carrying amount of the liability component	$	52,269		$	87,302
Remaining amortization period of discount		4 months			7 months
Exchange price	$	31.42		$	31.42
Number of shares to be issued upon exchange (a)		774			1,103
The amount by which the if-exchanged value exceeds the principal amount (a)	$	44,988		$	56,828
Effective interest rate on liability component		6.75	%		6.75	%
Non-cash interest cost recognized for the period ended	$	604		$	1,025	(b)
Coupon rate interest cost recognized for the period ended	$	858		$	1,779	(b)

(a) In accordance with accounting guidance on convertible debt instruments that require the principal amount to be settled in cash upon conversion, we are required to disclose the exchange price and the number of shares on which the aggregate consideration to be delivered upon exchange is determined (principal plus excess value). The 2026 Debentures require the entire principal amount to be settled in cash, and at our option, any excess value above the principal amount may be settled in cash and/or common shares. Based on the March 31, 2011 and December 31, 2010 closing share prices of Digital Realty Trust, Inc. common stock and the exchange prices in the table above, the excess value was approximately $45.0 million and $56.8 million, respectively; accordingly, approximately 0.8 million and 1.1 million common shares, respectively, would be issued if the 2026 Debentures were settled on these dates and we elected to settle the excess value in shares of Digital Realty Trust, Inc. common stock.

(b) Amounts are for the three months ended March 31, 2010.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

5.50% Exchangeable Senior Debentures due 2029

On April 20, 2009, the Operating Partnership issued $266.4 million of its 5.50% exchangeable senior debentures due April 15, 2029 (the 2029 Debentures). Costs incurred to issue the 2029 Debentures were approximately $7.8 million. These costs are being amortized over a period of five years, which represents the estimated term of the 2029 Debentures, and are included in deferred financing costs, net in the condensed consolidated balance sheet. The 2029 Debentures are general unsecured senior obligations of the Operating Partnership, rank equally in right of payment with all other senior unsecured indebtedness of the Operating Partnership and are fully and unconditionally guaranteed by Digital Realty Trust, Inc.

Interest is payable on October 15 and April 15 of each year beginning October 15, 2009 until the maturity date of April 15, 2029. The 2029 Debentures bear interest at 5.50% per annum and may be exchanged for shares of Digital Realty Trust, Inc. common stock at an exchange rate that was initially 23.2558 shares per $1,000 principal amount of 2029 Debentures. The exchange rate on the 2029 Debentures is subject to adjustment for certain events, including, but not limited to, certain dividends on Digital Realty Trust, Inc. common stock in excess of $0.33 per share per quarter (the “reference dividend”). Effective September 13, 2010, the exchange rate has been adjusted to 23.5360 shares per $1,000 principal amount of 2029 Debentures as a result of the aggregate dividends in excess of the reference dividend that Digital Realty Trust, Inc. declared and paid on its common stock beginning with the quarter ended June 30, 2009 and through the quarter ended September 30, 2010. Due to the fact that the exchange feature for the 2029 Debentures must be settled in the common stock of Digital Realty Trust, Inc., new accounting guidance on convertible debt instruments that requires the principal amount to be settled in cash upon conversion does not apply.

Prior to April 18, 2014, the Operating Partnership may not redeem the 2029 Debentures except to preserve Digital Realty Trust, Inc.’s status as a REIT for U.S. federal income tax purposes. On or after April 18, 2014, at the Operating Partnership’s option, the 2029 Debentures are redeemable in cash in whole or in part at 100% of the principal amount plus unpaid interest, if any, accrued to, but excluding, the redemption date, upon at least 30 days’ but not more than 60 days’ prior written notice to holders of the 2029 Debentures.

The holders of the 2029 Debentures have the right to require the Operating Partnership to repurchase the 2029 Debentures in cash in whole or in part on each of April 15, 2014, April 15, 2019 and April 15, 2024, and in the event of a designated event, for a repurchase price equal to 100% of the principal amount of the 2029 Debentures plus unpaid interest, if any, accrued to, but excluding, the repurchase date. Designated events include certain merger or combination transactions, non-affiliates becoming the beneficial owner of more than 50% of the total voting power of Digital Realty Trust, Inc.’s capital stock, a substantial turnover of Digital Realty Trust, Inc.’s directors within a 12-month period without the approval of existing members and Digital Realty Trust, Inc. ceasing to be the general partner of the Operating Partnership. Certain events are considered “Events of Default,” which may result in the accelerated maturity of the 2029 Debentures, including a default for 30 days in payment of any installment of interest under the 2029 Debentures, a default in the payment of the principal amount or any repurchase price or redemption price due with respect to the 2029 Debentures and the Operating Partnership’s failure to deliver shares of Digital Realty Trust, Inc. common stock within 15 days after the due date upon an exchange of the 2029 Debentures, together with any cash due in lieu of fractional shares of common stock.

We entered into a registration rights agreement whereby we must register the shares of common stock which could be issued in the future upon exchange of the 2029 Debentures. If we do not fulfill certain of our obligations under the registration rights agreement, we will be required to pay liquidated damages to the holders of the 2029 Debentures. No separate contingent obligation has been recorded as no liquidated damages have become probable. We filed the shelf registration statement with the U.S. Securities and Exchange Commission in December 2009, which was automatically effective upon filing.

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DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

The table below summarizes our debt maturities and principal payments as of March 31, 2011 (in thousands):

	Revolving Credit Facility (1)		Unsecured Senior Notes		Senior Notes			Exchangeable Senior Debentures			Mortgage Loans (2)		Other Secured Loan		Total Debt
Remainder of 2011	$	209,687	$	25,000	$	—		$	52,908	(3)	$	127,286	$	—	$	414,881
2012		—		—		—			—			162,780		—		162,780
2013		—		33,000		—			—			159,654		10,500		203,154
2014		—		—		—			266,400	(4)		219,907		—		486,307
2015		—		67,000		375,000			—			75,436		—		517,436
Thereafter		—		75,000		900,000			—			305,098		—		1,280,098
Subtotal	$	209,687	$	200,000	$	1,275,000		$	319,308		$	1,050,161	$	10,500	$	3,064,656
Unamortized discount		—		—		(9,649	)		(639	)		—		—		(10,288	)
Unamortized premium		—		—		—			—			1,061		—		1,061
Total	$	209,687	$	200,000	$	1,265,351		$	318,669		$	1,051,222	$	10,500	$	3,055,429

⁽¹⁾  Subject to a one-year extension option exercisable by us. The bank group is obligated to grant the extension option provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility.

⁽²⁾  Our mortgage loans are generally non-recourse to us, subject to carve outs for specified actions by us or specified undisclosed environmental liabilities. As of March 31, 2011, we had provided limited recourse guarantees with respect to approximately $159.1 million principal amount of the outstanding mortgage indebtedness, and partial letter of credit support with respect to approximately an additional $47.2 million of the outstanding mortgage indebtedness.

⁽³⁾  Assumes maturity of the 2026 Debentures at first redemption date in August 2011.

⁽⁴⁾  Assumes maturity of the 2029 Debentures at first redemption date in April 2014.

7. Income per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2011		2010
Net income available to common stockholders	$	30,980	$	14,744
Weighted average shares outstanding—basic		91,428,355		77,770,691
Potentially dilutive common shares:
Stock options		202,038		195,652
Class C Units (2007 Grant)		92,795		581,052
Unvested incentive units		153,066		129,450
Excess exchange value of the 2026 Debentures		723,961		2,065,265
Weighted average shares outstanding—diluted		92,600,215		80,742,110
Income per share:
Basic	$	0.34	$	0.19
Diluted	$	0.33	$	0.18

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. The 2026 Debentures are also

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three months ended March 31, 2011, the weighted average common stock price exceeded the strike price as of March 31, 2011 of $31.42. Therefore, using the treasury method, 723,961 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three months ended March 31, 2011. During the three months ended March 31, 2010, the weighted average common stock price exceeded the strike price as of March 31, 2010 of $31.84. Therefore, using the treasury method, 2,065,265 shares of common stock contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common shares in determining diluted earnings per share for the three months ended March 31, 2010.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended March 31,
	2011		2010
Weighted average of Operating Partnership common units not owned by us		4,874,253		5,462,409
Potentially dilutive outstanding stock options		—		6,284
Potentially dilutive 2029 Debentures		6,269,990		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Stock		3,652,324		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Stock		8,333,421		8,215,221
		23,129,988		23,536,736

8. Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Three Months Ended March 31,
	2011		2010
Net income available to common unitholders	$	32,632	$	15,717
Weighted average units outstanding—basic		96,302,608		83,233,100
Potentially dilutive common units:
Stock options		202,038		195,652
Class C Units (2007 Grant)		92,795		581,052
Unvested incentive units		153,066		129,450
Excess exchange value of the 2026 Debentures		723,961		2,065,265
Weighted average units outstanding—diluted		97,474,468		86,204,519
Income per unit:
Basic	$	0.34	$	0.19
Diluted	$	0.33	$	0.18

On or after July 15, 2026, the 2026 Debentures may be exchanged at the then-applicable exchange rate for cash (up to the principal amount of the 2026 Debentures) and, with respect to any excess exchange value, into cash, shares of Digital Realty Trust, Inc. common stock or a combination of cash and shares of Digital Realty Trust, Inc. common stock. Pursuant to the terms of the

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

Operating Partnership’s agreement of limited partnership, the Operating Partnership will deliver to Digital Realty Trust, Inc. one common unit for each share of common stock issuable upon exchange of the 2026 Debentures. The 2026 Debentures are also exchangeable prior to July 15, 2026, but only upon the occurrence of certain specified events. During the three months ended March 31, 2011, the weighted average common stock price exceeded the strike price as of March 31, 2011 of $31.42. Therefore, using the treasury method, 723,961 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three months ended March 31, 2011. During the three months ended March 31, 2010, the weighted average common stock price exceeded the strike price as of March 31, 2010 of $31.84. Therefore, using the treasury method, 2,065,265 common units contingently issuable upon settlement of the excess exchange value were included as potentially dilutive common units in determining diluted earnings per unit for the three months ended March 31, 2010.

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Three Months Ended March 31,
	2011		2010
Potentially dilutive outstanding stock options		—		6,284
Potentially dilutive 2029 Debentures		6,269,990		6,195,345
Potentially dilutive Series C Cumulative Convertible Preferred Units		3,652,324		3,657,477
Potentially dilutive Series D Cumulative Convertible Preferred Units		8,333,421		8,215,221
		18,255,735		18,074,327

9. Income Taxes

Digital Realty Trust, Inc. (the Parent Company) elected to be taxed as a REIT and believes that it has complied with the REIT requirements of the Code. As a REIT, the Parent Company is generally not subject to corporate level federal income taxes on taxable income to the extent it is currently distributed to its stockholders. Since inception, the Parent Company has distributed 100% of its taxable income and intends to do so for the tax year ending December 31, 2011. As such, no provision for federal income taxes has been included in the accompanying condensed consolidated financial statements for the three months ended March 31, 2011 and 2010.

We have elected taxable REIT subsidiary (TRS) status for some of our consolidated subsidiaries. In general, a TRS may provide services that would otherwise be considered impermissible for REITs and hold assets that REITs cannot hold directly. A TRS is subject to federal income tax as a regular C corporation. Income taxes for TRS entities are accrued, as necessary, for the three months ended March 31, 2011 and 2010.

For our TRS entities and foreign subsidiaries that are subject to U.S. federal, state and foreign income taxes, deferred tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of assets and liabilities at the enacted tax rates expected to be in effect when the temporary differences reverse. A valuation allowance for deferred tax assets is provided if we believe it is more likely than not that the deferred tax asset may not be realized, based on available evidence at the time the determination is made. An increase or decrease in the valuation allowance that results from the change in circumstances that causes a change in our judgment about the realizability of the related deferred tax asset is included in income. Deferred tax assets (net of valuation allowance) and liabilities for our TRS entities and foreign subsidiaries are accrued, as necessary, for the three months ended March 31, 2011 and 2010.

10. Equity and Accumulated Other Comprehensive Loss, Net

(a) Equity Distribution Agreements

On December 31, 2009, Digital Realty Trust, Inc. entered into equity distribution agreements, which we refer to as the Original Equity Distribution Agreements, with each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Credit Suisse Securities (USA) LLC, or the Original Agents, under which it could issue and sell shares of its common stock having an

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

aggregate offering price of up to $400,000,000 from time to time through, at its discretion, any of the Original Agents as its sales agents. On January 22, 2010, Digital Realty Trust, Inc. amended and restated each Original Equity Distribution Agreement with the applicable Original Agent, and also entered into a new equity distribution agreement with Morgan Stanley & Co. Incorporated, or collectively the Equity Distribution Agreements, under which it may issue and sell shares of its common stock having an aggregate offering price of up to $400,000,000 (including the approximately 1.1 million shares of common stock having an aggregate offering price of approximately $54.3 million sold pursuant to the Original Equity Distribution Agreements as of January 22, 2010), from time to time through, at its discretion, any of the Original Agents or Morgan Stanley & Co. Incorporated as its sales agents. On March 2, 2011, the Equity Distribution Agreements were amended to amend certain representations. The sales of common stock made under the Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act. For the three months ended March 31, 2011, Digital Realty Trust, Inc. generated net proceeds of approximately $5.6 million from the issuance of approximately 0.1 million common shares under the Equity Distribution Agreements at an average price of $58.44 per share after payment of approximately $0.1 million of commissions to the sales agents.

(b) Noncontrolling Interests in Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the interests that are not owned by Digital Realty Trust, Inc. The following table shows the ownership interest in the Operating Partnership as of March 31, 2011 and December 31, 2010:

	March 31, 2011					December 31, 2010
	Number of units		Percentage of total			Number of units		Percentage of total
Digital Realty Trust, Inc.		92,078,429		94.4	%		91,159,221		94.3	%
Noncontrolling interests consist of:
Common units held by third parties		3,810,814		3.9			3,937,827		4.1
Incentive units held by employees and directors (see note 12)		1,665,994		1.7			1,525,592		1.6
		97,555,237		100.0	%		96,622,640		100.0	%

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of Digital Realty Trust, Inc. common stock at the time of redemption. Alternatively, Digital Realty Trust, Inc. may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, Digital Realty Trust, Inc. evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the noncontrolling Operating Partnership common and incentive units. Based on the results of this analysis, we concluded that the common and incentive Operating Partnership units met the criteria to be classified within equity.

The redemption value of the noncontrolling Operating Partnership common units and the vested incentive units was approximately $276.7 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc. common stock on March 31, 2011 and December 31, 2010, respectively.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

The following table shows activity for the noncontrolling interests in the Operating Partnership for the three months ended March 31, 2011:

	Common Units			Incentive Units			Total
As of December 31, 2010		3,937,827			1,525,622			5,463,449
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (1)		(127,013	)		—			(127,013	)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (1)		—			(37,163	)		(37,163	)
Grant of incentive units to employees and directors		—			177,535			177,535
As of March 31, 2011		3,810,814			1,665,994			5,476,808

(1) This redemption was recorded as a reduction to noncontrolling interests in the Operating Partnership and an increase to common stock and additional paid in capital based on the book value per unit in the accompanying condensed consolidated balance sheet of Digital Realty Trust, Inc.

Under the terms of certain third parties’ (the eXchange parties) contribution agreements signed in the third quarter of 2004, we have agreed to indemnify each eXchange party against adverse tax consequences in the event the Operating Partnership directly or indirectly sells, exchanges or otherwise disposes of (whether by way of merger, sale of assets or otherwise) in a taxable transaction any interest in 200 Paul Avenue 1-4 or 1100 Space Park Drive until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO. Under the eXchange parties’ amended contribution agreement, the Operating Partnership has agreed to make approximately $17.8 million of indebtedness available for guaranty by the eXchange parties until the earlier of November 3, 2013 and the date on which these contributors or certain transferees hold less than 25% of the Operating Partnership common units issued to them in the formation transactions consummated concurrently with the IPO, and we have agreed to indemnify each eXchange party against adverse tax consequences if the Operating Partnership does not provide such indebtedness to guarantee.

(c) Dividends

We have declared the following dividends on our common and preferred stock for the three months ended March 31, 2011 (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
			$	1,832	$	4,690	$	62,459

(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Distributions out of Digital Realty Trust, Inc.’s current or accumulated earnings and profits are generally classified as dividends whereas distributions in excess of its current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in Digital Realty Trust, Inc.’s stock are generally characterized as capital gain. Cash provided by operating activities has been sufficient to fund all distributions.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

(d) Accumulated Other Comprehensive Loss, Net

The accumulated balances for each classification of other comprehensive loss, net as of March 31, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss, net
Balance as of December 31, 2010	$	(33,175	)	$	(8,906	)	$	(42,081	)
Net current period change		15,576			1,430			17,006
Reclassification to interest expense from interest rate swaps		—			1,505			1,505
Balance as of March 31, 2011	$	(17,599	)	$	(5,971	)	$	(23,570	)

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

11. Capital and Comprehensive Income

(a) Allocations of Net Income and Net Losses to Partners

Except for special allocations to holders of profits interest units described below in note 12(a) under the heading “Incentive Plans-Long-Term Incentive Units,” the Operating Partnership’s net income will generally be allocated to Digital Realty Trust, Inc. (the General Partner) to the extent of the accrued preferred return on its preferred units, and then to the General Partner and the Operating Partnership’s limited partners in accordance with the respective percentage interests in the common units issued by the Operating Partnership. Net loss will generally be allocated to the General Partner and the Operating Partnership’s limited partners in accordance with the respective common percentage interests in the Operating Partnership until the limited partner’s capital is reduced to zero and any remaining net loss would be allocated to the General Partner. However, in some cases, losses may be disproportionately allocated to partners who have guaranteed our debt. The allocations described above are subject to special allocations relating to depreciation deductions and to compliance with the provisions of Sections 704(b) and 704(c) of the Code, and the associated Treasury Regulations.

(b) Partnership Units

Limited partners have the right to require the Operating Partnership to redeem part or all of their common units for cash based on the fair market value of an equivalent number of shares of the General Partner’s common stock at the time of redemption. Alternatively, the General Partner may elect to acquire those common units in exchange for shares of the General Partner’s common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to authoritative accounting guidance, the Operating Partnership evaluated whether it controls the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of the limited partners’ common units and the vested incentive units. Based on the results of this analysis, the Operating Partnership concluded that the common and vested incentive Operating Partnership units met the criteria to be classified within capital.

The redemption value of the limited partners’ common units and the vested incentive units was approximately $276.7 million and $244.5 million based on the closing market price of Digital Realty Trust, Inc.’s common stock on March 31, 2011 and December 31, 2010, respectively.

(c) Distributions

All distributions on our units are at the discretion of Digital Realty Trust, Inc.’s board of directors. As of March 31, 2011, the Operating Partnership declared the following distributions (in thousands):

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
			$	1,832	$	4,690	$	66,252

(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

(d) Accumulated Other Comprehensive Loss

The accumulated balances for each classification of other comprehensive loss as of March 31, 2011 are as follows (in thousands):

	Foreign currency translation adjustments			Cash flow hedge adjustments			Accumulated other comprehensive loss
Balance as of December 31, 2010	$	(36,051	)	$	(9,809	)	$	(45,860	)
Net current period change		16,406			1,506			17,912
Reclassification to interest expense from interest rate swaps		—			1,585			1,585
Balance as of March 31, 2011	$	(19,645	)	$	(6,718	)	$	(26,363	)

12. Incentive Plan

Our 2004 Incentive Award Plan provides for the grant of incentive awards to employees, directors and consultants. Awards issuable under the 2004 Incentive Award Plan include stock options, restricted stock, dividend equivalents, stock appreciation rights, long-term incentive units, cash performance bonuses and other incentive awards. Only employees are eligible to receive incentive stock options under the 2004 Incentive Award Plan. Initially, we had reserved a total of 4,474,102 shares of common stock for issuance pursuant to the 2004 Incentive Award Plan, subject to certain adjustments set forth in the 2004 Incentive Award Plan. On May 2, 2007, Digital Realty Trust, Inc.’s stockholders approved the First Amended and Restated Digital Realty Trust, Inc., Digital Realty Services, Inc. and Digital Realty Trust, L.P. 2004 Incentive Award Plan (as amended, the Amended and Restated 2004 Incentive Award Plan). The Amended and Restated 2004 Incentive Award Plan increases the aggregate number of shares of stock which may be issued or transferred under the plan by 5,000,000 shares to a total of 9,474,102 shares, and provides that the maximum number of shares of stock with respect to awards granted to any one participant during a calendar year will be 1,500,000 and the maximum amount that may be paid in cash during any calendar year with respect to any performance-based award not denominated in stock or otherwise for which the foregoing limitation would not be an effective limitation for purposes of Section 162(m) of the Code will be $10.0 million.

As of March 31, 2011, 3,681,173 shares of common stock or awards convertible into or exchangeable for common stock remained available for future issuance under the Amended and Restated 2004 Incentive Award Plan. Each long-term incentive and Class C unit issued under the Amended and Restated 2004 Incentive Award Plan will count as one share of common stock for purposes of calculating the limit on shares that may be issued under the Amended and Restated 2004 Incentive Award Plan and the individual award limit discussed above.

(a) Long-Term Incentive Units

Long-term incentive units, which are also referred to as profits interest units, may be issued to eligible participants for the performance of services to or for the benefit of the Operating Partnership. Long-term incentive units, whether vested or not, will receive the same quarterly per unit distributions as Operating Partnership common units, which equal per share distributions on Digital Realty Trust, Inc. common stock. Initially, long-term incentive units do not have full parity with common units with respect to liquidating distributions. If such parity is reached, vested long-term incentive units may be converted into an equal number of common units of the Operating Partnership at any time, and thereafter enjoy all the rights of common units of the Operating Partnership, including redemption rights.

In order to achieve full parity with common units, long-term incentive units must be fully vested and the holder’s capital account balance in respect of such long-term incentive units must be equal to the capital account balance of a holder of an equivalent number of common units. The capital account balance attributable to each common unit is generally expected to be the same, in part because of the amount credited to a partner’s capital account upon the partner’s contribution of property to the Operating Partnership, and in part because the partnership agreement provides, in most cases, that allocations of income, gain, loss and deduction (which will adjust the partner’s capital accounts) are to be made to the common units on a proportionate basis. As a result, with respect to a number of long-term incentive units, it is possible to determine the capital account balance of an equivalent number of common units by multiplying the number of long-term incentive units by the capital account balance with respect to a common unit.

39

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

A partner’s initial capital account balance is equal to the amount the partner paid (or contributed to the Operating Partnership) for the partner’s units and is subject to subsequent adjustments, including with respect to the partner’s share of income, gain or loss of the Operating Partnership. Because a holder of long-term incentive units generally will not pay for the long-term incentive units, the initial capital account balance attributable to such long-term incentive units will be zero. However, the Operating Partnership is required to allocate income, gain, loss and deduction to the partner’s capital accounts in accordance with the terms of the partnership agreement, subject to applicable Treasury Regulations. The partnership agreement provides that holders of long-term incentive units will receive special allocations of gain in the event of a sale or “hypothetical sale” of assets of the Operating Partnership prior to the allocation of gain to Digital Realty Trust, Inc. or other limited partners with respect to their common units. The amount of such allocation will, to the extent of any such gain, be equal to the difference between the capital account balance of a holder of long-term incentive units attributable to such units and the capital account balance attributable to an equivalent number of common units. If and when such gain allocation is fully made, a holder of long-term incentive units will have achieved full parity with holders of common units. To the extent that, upon an actual sale or a “hypothetical sale” of the Operating Partnership’s assets as described above, there is not sufficient gain to allocate to a holder’s capital account with respect to long-term incentive units, or if such sale or “hypothetical sale” does not occur, such units will not achieve parity with common units.

The term “hypothetical sale” refers to circumstances that are not actual sales of the Operating Partnership’s assets but that require certain adjustments to the value of the Operating Partnership’s assets and the partners’ capital account balances. Specifically, the partnership agreement provides that, from time to time, in accordance with applicable Treasury Regulations, the Operating Partnership will adjust the value of its assets to equal their respective fair market values, and adjust the partners’ capital accounts, in accordance with the terms of the partnership agreement, as if the Operating Partnership sold its assets for an amount equal to their value. Times for making such adjustments generally include the liquidation of the Operating Partnership, the acquisition of an additional interest in the Operating Partnership by a new or existing partner in exchange for more than a de minimis capital contribution, the distribution by the Operating Partnership to a partner of more than a de minimis amount of partnership property as consideration for an interest in the Operating Partnership, in connection with the grant of an interest in the Operating Partnership (other than a de minimis interest) as consideration for the performance of services to or for the benefit of the Operating Partnership (including the grant of a long-term incentive unit), and at such other times as may be desirable or required to comply with the Treasury Regulations.

During the three months ended March 31, 2011 and 2010, certain employees were granted an aggregate of 78,903 and 86,393 long-term incentive units, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which is four years. During the three months ended March 31, 2011 and 2010, certain employees were also granted an aggregate of 98,632 and 107,993 long-term incentive units, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of units in which the employee ultimately vests. The performance condition is based upon our achievement of the respective fiscal years’ Funds From Operations per share targets. Upon evaluating the results of the performance condition, the final number of units is determined and such units vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date, provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 long-term incentive units satisfied the performance condition. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the long-term incentive units, which ranges from four to five years.

The expense recorded for the three months ended March 31, 2011 and 2010 related to long-term incentive units was approximately $1.9 million and $1.2 million, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.2 million and $0.2 million for the three months ended March 31, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the long-term incentive units totaled $20.6 million and $12.9 million as of March 31, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 3.1 years on a weighted average basis.

(b) Class C Profits Interest Units

On May 2, 2007, we granted awards of Class C Profits Interest Units of the Operating Partnership or similar stock-based performance awards, which we refer to collectively as the Class C Units, under the Amended and Restated 2004 Incentive Award Plan (2007 Grant) to each of our named executive officers and certain other officers and employees.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

The Class C Units subject to this award were subject to vesting based on the achievement of a total stockholder return (which we refer to as the market condition) as measured on November 1, 2008 (which we refer to as the first measurement date) and May 1, 2010 (which we refer to as the second measurement date). If:

• with respect to the first measurement date, we achieved a total shareholder return equal to at least 18% over the period commencing on May 2, 2007 and ending on November 1, 2008; and

• with respect to the second measurement date, we achieved a total shareholder return equal to at least 36% over a period commencing on May 2, 2007 and ending on the earlier of May 1, 2010 and the date of a change in control of our company,

the aggregate amount of the 2007 Grant award was equal to 8% of the excess shareholder value, as defined, created during the applicable performance period, but in no event in excess of:

• $17 million for the first measurement date; or

• $40 million (less the amount of the award pool as of the first measurement date) for the second measurement date.

We previously determined that the market condition with respect to the first measurement date was not achieved. On May 1, 2010, we determined that 613,485 of the Class C Units subject to the 2007 Grant satisfied the market condition on the second measurement date (May 1, 2010), with the value of these units equal to the maximum amount of the award pool payable pursuant to the 2007 Grant on the second measurement date. Of the Class C Units that satisfied the market condition on May 1, 2010, 60% vested on May 1, 2010 and the remaining 40% will vest ratably each month thereafter for 24 months.

The fair value of the 2007 Grant was measured on the grant date using a Monte Carlo simulation to estimate the probability of the multiple market conditions being satisfied. The Monte Carlo simulation uses a statistical formula underlying the Black-Scholes and binomial formulas, and such simulation was run approximately 100,000 times. For each simulation, the value of the payoff was calculated at the settlement date and was then discounted to the grant date at a risk-free interest rate. The expected value of the Class C units on the grant date was determined by multiplying the average of the values over all simulations by the number of outstanding shares of Digital Realty Trust, Inc. common stock and Operating Partnership units. The valuation was performed in a risk-neutral framework, so no assumption was made with respect to an equity risk premium. Other significant assumptions used in the valuation included an expected term of 36 months, expected stock price volatility of 23%, a risk-free interest rate of 4.6%, and a dividend growth rate of 5.0 percent. The fixed award limit under the plan is $17 million for the first market condition and $40 million for the second market condition, and there were 69.2 million shares of Digital Realty Trust, Inc. common stock and Operating Partnership units outstanding as of the 2007 grant date. The grant date fair value of these awards of approximately $11.8 million will be recognized as compensation expense on a straight-line basis over the expected service period of five years. The unearned compensation as of March 31, 2011 and December 31, 2010 was $2.4 million and $2.9 million, respectively. As of March 31, 2011 and December 31, 2010, 469,320 and 439,653, respectively, of the Class C Units subject to the 2007 Grant had vested. We recognized compensation expense related to the Class C Units subject to the 2007 Grant of $0.5 million and $0.5 million for the three months ended March 31, 2011 and 2010, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of $0.1 million and $0.1 million for the three months ended March 31, 2011 and 2010, respectively.

(c) Stock Options

The fair value of each option granted under the 2004 Incentive Award Plan is estimated on the date of the grant using the Black-Scholes option-pricing model. For the three months ended March 31, 2011 and 2010, no stock options were granted. The fair values are being expensed on a straight-line basis over the vesting period of the options, which ranges from four to five years. The expense recorded for the three months ended March 31, 2011 and 2010, respectively was approximately $0.2 million and $0.2 million, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.1 million and $0.1 million for the three months ended March 31, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the stock options totaled $1.0 million and $1.3 million as of March 31, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 1.0 year on a weighted average basis.

41

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

The following table summarizes the 2004 Incentive Award Plan’s stock option activity for the three months ended March 31, 2011:

	Period ended March 31, 2011
	Shares			Weighted average exercise price
Options outstanding, beginning of period		470,264		$	28.35
Exercised		(23,232	)		37.27
Cancelled / Forfeited		(2,334	)		41.73
Options outstanding, end of period		444,698		$	27.82
Exercisable, end of period		353,621		$	24.38

The following table summarizes information about stock options outstanding and exercisable as of March 31, 2011:

Options outstanding									Options exercisable
Exercise price	Number outstanding		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value		Number exercisable		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value
$12.00-13.02		182,369		3.58	$	12.01	$	8,413,231		182,369		3.58	$	12.01	$	8,413,231
$20.37-28.09		25,973		4.74		23.61		896,839		25,639		4.74		23.57		886,362
$33.18-41.73		236,356		6.02		40.48		4,173,675		145,613		5.99		40.01		2,640,004
		444,698		4.94	$	27.82	$	13,483,745		353,621		4.66	$	24.38	$	11,939,597

(d) Restricted Stock

During the three months ended March 31, 2011 and 2010, certain employees were granted an aggregate of 40,807 and 30,329 shares of restricted stock, respectively. The grant date fair values, which equal the market price of Digital Realty Trust, Inc. common stock, are being expensed on a straight-line basis over the vesting period of the restricted stock, which is four years. During the three months ended March 31, 2011 and 2010, certain employees were also granted an aggregate of 50,999 and 37,914 shares of restricted stock, respectively, which, in addition to a service condition, are subject to a performance condition that impacts the number of shares in which the employee ultimately vests. The performance condition is based upon our achievement of the respective year’s FFO per share targets. Upon evaluating the results of the performance condition, the final number of shares is determined and such shares vest based on satisfaction of the service conditions. The service conditions of the awards provide for 20% vesting on each of the first and second anniversaries of the grant date and 30% vesting on each of the third and fourth anniversaries of the grant date provided the grantee continues employment on each anniversary date. Based on our 2010 FFO per diluted share and unit, all of the 2010 restricted stock satisfied the performance condition.

The expense recorded for the three months ended March 31, 2011 and 2010 related to grants of restricted stock was approximately $0.4 million and $0.3 million, respectively. We capitalized amounts relating to compensation expense of employees direct and incremental to construction and successful leasing activities of approximately $0.3 million and $0.2 million for the three months ended March 31, 2011 and 2010, respectively. Unearned compensation representing the unvested portion of the restricted stock totaled $8.2 million and $4.2 million as of March 31, 2011 and December 31, 2010, respectively. We expect to recognize this unearned compensation over the next 3.4 years on a weighted average basis.

42

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

13. Derivative Instruments

Currently, we use interest rate caps and swaps to manage our interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of fair value accounting guidance, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

Although we have determined that the majority of the inputs used to value our derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, as of December 31, 2010, we have assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and have determined that the credit valuation adjustments are not significant to the overall valuation of our derivatives. As a result, we have determined that our derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

Cash Flow Hedges of Interest Rate Risk

Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements related to US LIBOR, GBP LIBOR and EURIBOR based mortgage loans. To accomplish this objective, we primarily use interest rate swaps and caps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Under an interest rate cap, if the reference interest rate, such as one-month LIBOR, increases above the cap rate, the holder of the instrument receives a payment based on the notional value of the instrument, the length of the period, and the difference between the current reference rate and the cap rate. If the reference rate increases above the cap rate, the payment received under the interest rate cap will offset the increase in the payments due under the variable rate notes payable.

We record all our interest rate swaps and caps on the consolidated balance sheet at fair value. In determining the fair value of our interest rate swaps and caps, we consider the credit risk of our counterparties. These counterparties are generally larger financial institutions engaged in providing a variety of financial services. These institutions generally face similar risks regarding adverse changes in market and economic conditions, including, but not limited to, fluctuations in interest rates, exchange rates, equity and commodity prices and credit spreads. The current and pervasive disruptions in the financial markets have heightened the risks to these institutions.

Interest rate caps are viewed as a series of call options or caplets which exist for each period the cap agreement is in existence. As each caplet expires, the related cost of the expired caplet is amortized to interest expense with the remaining caplets carried at fair value. The value of interest rate caps is primarily impacted by interest rates, market expectations about interest rates, and the remaining life of the instrument. In general, increases in interest rates, or anticipated increases in interest rates, will increase the value of interest rate caps. As the remaining life of an interest rate cap decreases, the value of the instrument will generally decrease towards zero. The purchase price of an interest rate cap is amortized to interest expense over the contractual life of the instrument. For interest rate caps that are designated as cash flow hedges under accounting guidance as it relates to derivative instruments, the change in the fair value of an effective interest rate cap is recorded to accumulated other comprehensive income in equity. Amounts we are entitled to under interest rate caps, if any, are recognized on an accrual basis, and are recorded to as a reduction against interest expense in the accompanying consolidated statements of operations.

43

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

Our agreements with some of our derivative counterparties provide either that (1) we could be declared in default on our derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to our default on the indebtedness or (2) we could be declared in default on our derivative obligations if we default on any of our indebtedness, including a default where repayment of the underlying indebtedness has not been accelerated by the lender.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2011, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. The fair value of these derivatives was ($4.9) million and ($8.0) million at March 31, 2011 and December 31, 2010, respectively. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three months ended March 31, 2011 and 2010, respectively, there were no ineffective portions to our interest rate swaps.

Amounts reported in accumulated other comprehensive loss related to interest rate swaps will be reclassified to interest expense as interest payments are made on our debt. As of March 31, 2011, we estimate that an additional $4.1 million will be reclassified as an increase to interest expense during the twelve months ending March 31, 2012, when the hedged forecasted transactions impact earnings.

As of March 31, 2011 and December 31, 2010, we had the following outstanding interest rate derivatives that were designated as cash flow hedges of interest rate risk (in thousands):

Notional Amount														Fair Value at Significant Other Observable Inputs (Level 2)
As of March 31, 2011			As of December 31, 2010			Type of Derivative		Strike Rate		Effective Date		Expiration Date		As of March 31, 2011			As of December 31, 2010
$	19,875	(1)	$	19,515	(1)		Swap		4.944		Jul. 10, 2006		Apr. 10, 2011	$	(23	)	$	(231	)
	68,640	(1)		66,858	(1)		Swap		2.980		April 6, 2009		Nov. 30, 2013		(1,810	)		(2,471	)
	14,727	(2)		13,978	(2)		Swap		3.981		May 17, 2006		Jul. 18, 2013		(561	)		(828	)
	10,655	(2)		10,113	(2)		Swap		4.070		Jun. 23, 2006		Jul. 18, 2013		(427	)		(621	)
	9,377	(2)		8,900	(2)		Swap		3.989		Jul. 27, 2006		Oct. 18, 2013		(378	)		(557	)
	43,652	(2)		41,430	(2)		Swap		3.776		Dec. 5, 2006		Jan. 18, 2012		(761	)		(1,129	)
	37,530	(2)		35,620	(2)		Swap		4.000		Dec. 20, 2006		Jan. 18, 2012		(722	)		(1,054	)
	42,474	(2)		40,152	(2)		Swap		2.703		Dec. 3, 2009		Sep. 4, 2014		(225	)		(1,139	)
	16,778			16,976			Cap		4.000		June 24, 2009		June 25, 2012		1			3
	20,500			20,500			Cap		4.000		Aug. 4, 2010		June 15, 2013		25			30
$	284,208		$	274,042										$	(4,881	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.60 to £1.00 as of March 31, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.42 to €1.00 as of March 31, 2011 and $1.34 to €1.00 as of December 31, 2010.

We do not have any fair value measurements using significant unobservable inputs (Level 3) as of March 31, 2011 or December 31, 2010.

44

DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

14. Fair Value of Instruments

We disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value.

Current accounting guidance requires the Company to disclose fair value information about all financial instruments, whether or not recognized in the balance sheets, for which it is practicable to estimate fair value. The Company’s disclosures of estimated fair value of financial instruments at March 31, 2011 and December 31, 2010 were determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair value. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.

The carrying amounts for cash and cash equivalents, restricted cash, accounts and other receivables, accounts payable and other accrued liabilities, security deposits and prepaid rents approximate fair value because of the short-term nature of these instruments. As described in note 13, the interest rate cap and interest rate swaps are recorded at fair value.

We calculate the fair value of our mortgage loans, unsecured senior notes and exchangeable senior debentures based on currently available market rates assuming the loans are outstanding through maturity and considering the collateral and other loan terms, including excess exchange value which exists related to our 2026 Debentures. In determining the current market rate for fixed rate debt, a market spread is added to the quoted yields on federal government treasury securities with similar maturity dates to debt. The carrying value of our revolving credit facility approximates fair value, due to the short-term nature of this instrument along with the variability of interest rates.

As of March 31, 2011 and December 31, 2010, the aggregate estimated fair value and carrying value of our revolving credit facility, unsecured senior notes, exchangeable senior debentures, mortgage loans and other secured loan were as follows (in thousands):

	As of March 31, 2011				As of December 31, 2010
	Estimated Fair Value		Carrying Value		Estimated Fair Value		Carrying Value
Revolving credit facility (1)	$	209,687	$	209,687	$	333,534	$	333,534
Unsecured senior notes (2)(3)		1,517,657		1,465,351		1,103,983		1,066,030
Exchangeable senior debentures (2)(3)		483,356		318,669		504,241		353,702
Mortgage loans (2)		1,085,768		1,051,222		1,078,220		1,043,188
Other secured loan		10,700		10,500		10,720		10,500
	$	3,307,168	$	3,055,429	$	3,030,698	$	2,806,954

(1) The carrying value of our revolving credit facility approximates estimated fair value, due to the short-term nature of this instrument along with the variability of interest rates.

(2) Valuations for our unsecured senior notes and mortgage loans are determined based on the expected future payments discounted at risk-adjusted rates. The 2015 Notes, 2020 Notes and 2021 Notes and exchangeable senior debentures are valued based on quoted market prices.

(3) The carrying value of the 2015 Notes, 2020 Notes and 2021 Notes are net of discount of $9,649 and $8,970 in the aggregate as of March 31, 2011 and December 31, 2010, respectively. The carrying values of our exchangeable senior debentures are net of discount of $639 and $1,456 as of March 31, 2011 and December 31, 2010, respectively, related to our 2026 Debentures.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

15. Related Party Transactions

In December 2006, we entered into ten leases with tel(x), pursuant to which tel(x) provides enhanced meet-me-room services to our customers. The initial terms of these leases expire in 2026, and tel(x) has options to extend them through 2046. tel(x) was acquired by GI Partners Fund II, LLP in November 2006. Richard Magnuson, our Chairman, is also the chief executive officer of the advisor to GI Partners Fund II, LLP. Our condensed consolidated statements of operations include rental revenues of approximately $8.8 million and $5.1 million from tel(x) for the three months ended March 31, 2011 and 2010, respectively. In connection with the lease agreements, we entered into an operating agreement with tel(x), effective as of December 1, 2006, with respect to joint sales and marketing efforts, designation of representatives to manage the national relationship between us and tel(x) and future meet-me-room facilities. Under the operating agreement, tel(x) has a sixty-day option to enter into a meet-me-room lease for certain future meet-me-room buildings acquired by us or any buildings currently owned by us that are converted into a meet-me-room building. As of March 31, 2011 and December 31, 2010, tel(x) leases 202,987 square feet from us under 31 lease agreements.

We also entered into an agreement with tel(x), effective as of December 1, 2006, with respect to percentage rent arising out of potential future lease agreements for rentable space in buildings covered by the meet-me-room lease agreements. Percentage rent earned during the three months ended March 31, 2011 and 2010 amounted to approximately $79,000 and $11,000, respectively.

In addition, in connection with the lease agreements, we entered into a management agreement with tel(x), effective as of December 1, 2007, pursuant to which tel(x) agreed to provide us with certain management services in exchange for a management fee of one percent of rents actually collected by tel(x).

We are party to seven leases with SoftLayer, of which five are in place as of March 31, 2011 and the remaining two will commence in future periods. The initial terms of these leases expire from 2013 to 2025, and SoftLayer has options to extend them from 2018 through 2035. On August 3, 2010, GI Partners Fund III, L.P. acquired a controlling interest in SoftLayer. Richard Magnuson, our Chairman, is also a manager of the general partner to GI Partners Fund III, L.P. Our condensed consolidated statements of operations include rental revenues of approximately $2.3 million from SoftLayer for the three months ended March 31, 2011. No rental revenues were earned from SoftLayer for the three months ended March 31, 2010.

16. Commitments and Contingencies

We have agreed with the seller of 350 East Cermak Road to share a portion, not to exceed $135,000 per month, of rental revenue, adjusted for our costs to lease the premises, from the leases of the 192,000 square feet of space held for redevelopment. This revenue sharing agreement will terminate in May 2012. We made payments of approximately $0.4 million and $10,000 to the seller during the three months ended March 31, 2011 and 2010, respectively. We have recorded approximately $1.9 million and $2.3 million for this contingent liability on our consolidated balance sheet at March 31, 2011 and December 31, 2010, respectively.

As part of the acquisition of Clonshaugh Industrial Estate I, we entered into an agreement with the seller whereby the seller is entitled to receive 40% of the net rental income generated by the existing building after we have received a 9% return on all capital invested in the property. As of February 6, 2006, the date we acquired this property, we have estimated the present value of these expected payments over the 10 year lease term to be approximately $1.1 million and this value has been recorded as a component of the purchase price. Accounts payable and other liabilities include $1.4 million and $1.3 million for this liability as of March 31, 2011 and December 31, 2010, respectively. There were no payments made to the seller during the three months ended March 31, 2011 and 2010.

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements and from time to time in the normal course of our business, we enter into various construction contracts with third parties that may obligate us to make payments. At March 31, 2011, we had open commitments related to construction contracts of approximately $102.2 million.

As part of the acquisition of 29A International Business Park, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined. As of March 31, 2011, construction is not complete and there have been no leases executed that would cause an amount to become probable of payment and therefore no amount is accrued as of March 31, 2011. The maximum amount that could be earned by the seller is S$50.0 million (or approximately $39.7 million based on the exchange rate as of March 31, 2011). The earnout contingency expires in November 2020.

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DIGITAL REALTY TRUST, INC. AND SUBSIDIARIES

DIGITAL REALTY TRUST, L.P. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

March 31, 2011 and 2010

(unaudited)

17. Subsequent Events

On April 25, 2011, we declared the following dividends per share and the Operating Partnership declared an equivalent distribution per unit:

Share Class	Series C Preferred Stock		Series D Preferred Stock		Common stock and common unit
Dividend and distribution amount	$	0.273438	$	0.343750	$	0.680000
Dividend and distribution payable date		June 30, 2011		June 30, 2011		June 30, 2011
Dividend payable to shareholders of record on		June 15, 2011		June 15, 2011		June 15, 2011
Annual equivalent rate of dividend and distribution	$	1.094	$	1.375	$	2.720

On April 15, 2011, we completed the acquisition of a 38.8 acre development site located contiguous to our datacenter campus in Ashburn, Virginia. The purchase price was $17.3 million and was funded with borrowings under our revolving credit facility.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes thereto appearing elsewhere in this report. This report contains forward-looking statements within the meaning of the federal securities laws. In particular, statements pertaining to our capital resources, portfolio performance, leverage policy and acquisition and capital expenditure plans, as well as our discussion of “Factors Which May Influence Future Results of Operations,” contain forward-looking statements. Likewise, all of our statements regarding anticipated market conditions, demographics and results of operations are forward-looking statements. You can identify forward-looking statements by the use of forward-looking terminology such as “believes,” “expects,” “may,” “will,” “should,” “seeks,” “approximately,” “intends,” “plans,” “pro forma,” “estimates” or “anticipates” or the negative of these words and phrases or similar words or phrases which are predictions of or indicate future events or trends and discussions which do not relate solely to historical matters. You can also identify forward-looking statements by discussions of strategy, plans or intentions. Forward-looking statements involve numerous risks and uncertainties and you should not rely on them as predictions of future events. Forward-looking statements depend on assumptions, data or methods that may be incorrect or imprecise and that we may not be able to realize. We do not guarantee that the transactions and events described will happen as described (or that they will happen at all). The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements: the impact of the recent deterioration in global economic, credit and market conditions; current local economic conditions in our geographic markets; decreases in information technology spending, including as a result of economic slowdowns or recession; adverse economic or real estate developments in our industry or the industry sectors that we sell to (including risks relating to decreasing real estate valuations and impairment charges); our dependence upon significant tenants; bankruptcy or insolvency of a major tenant or a significant number of smaller tenants; defaults on or non-renewal of leases by tenants; our failure to obtain necessary debt and equity financing; increased interest rates and operating costs; risks associated with using debt to fund our business activities, including re-financing and interest rate risks, our failure to repay debt when due, adverse changes in our credit ratings or our breach of covenants or other terms contained in our loan facilities and agreements; financial market fluctuations; changes in foreign currency exchange rates; our inability to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; our failure to successfully integrate and operate acquired or redeveloped properties; risks related to joint venture investments, including as a result of our lack of control of such investments; delays or unexpected costs in development or redevelopment of properties; decreased rental rates or increased vacancy rates; increased competition or available supply of data center space; our inability to successfully develop and lease new properties and space held for redevelopment; difficulties in identifying properties to acquire and completing acquisitions; our inability to acquire off-market properties; our inability to comply with the rules and regulations applicable to reporting companies; Digital Realty Trust, Inc.’s failure to maintain its status as a REIT; possible adverse changes to tax laws; restrictions on our ability to engage in certain business activities; environmental uncertainties and risks related to natural disasters; losses in excess of our insurance coverage; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and changes in local, state and federal regulatory requirements, including changes in real estate and zoning laws and increases in real property tax rates.

While forward-looking statements reflect our good faith beliefs, they are not guaranties of future performance. We disclaim any obligation to publicly update or revise any forward-looking statement to reflect changes in underlying assumptions or factors, new information, data or methods, future events or other changes.

The risks included here are not exhaustive, and additional factors could adversely affect our business and financial performance, including factors and risks included in other sections of this report, including under Part II, Item 1A, Risk Factors. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all such risk factors, nor can we assess the impact of all such risk factors on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, you should not place undue reliance on forward-looking statements as a prediction of actual results.

Occupancy percentages discussed in the following discussion, for some of our properties, are calculated based on factors in addition to contractually leased square feet, including available power, required support space and common area.

Overview

Our company. Digital Realty Trust, Inc. completed its initial public offering of common stock, or our IPO, on November 3, 2004. We believe that we have operated in a manner that has enabled Digital Realty Trust, Inc. to qualify, and have elected to treat Digital Realty Trust, Inc., as a REIT under Sections 856 through 860 of the Code. Digital Realty Trust, Inc. was formed on March 9, 2004. During the period from our formation until we commenced operations in connection with the completion of our IPO, we did not have any corporate activity other than the issuance of shares of Digital Realty Trust, Inc. common stock in connection with the initial capitalization of the company. Our operating partnership was formed on July 20, 2004.

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Business and strategy. Our primary business objectives are to maximize: (i) sustainable long-term growth in earnings and funds from operations per share and unit and (ii) cash flow and returns to our stockholders and our operating partnership’s unitholders, including through the payment of distributions. We expect to achieve our objectives by focusing on our core business of investing in and redeveloping technology-related real estate. A significant component of our current and future internal growth is anticipated through the development of our existing space held for redevelopment and new properties. We target high quality, strategically located properties containing applications and operations critical to the day-to-day operations of corporate enterprise datacenter and technology industry tenants and properties that may be redeveloped for such use. Most of our properties contain fully redundant electrical supply systems, multiple power feeds, above-standard precision cooling systems, raised floor areas, extensive in-building communications cabling and high-level security systems. We focus solely on technology-related real estate because we believe that the growth in corporate datacenter adoption and the technology-related real estate industry generally will continue to be superior to that of the overall economy.

As of March 31, 2011, we owned an aggregate of 96 technology-related real estate properties, excluding two properties held as investments in unconsolidated joint ventures, with approximately 16.9 million rentable square feet including approximately 2.2 million square feet of space held for redevelopment. At March 31, 2011, approximately 346,000 square feet of our space held for redevelopment was under construction for Turn-Key Datacenter^®, Powered Base Building^® and build-to-suit space in seven U.S. markets and two European markets.

We have developed detailed, standardized procedures for evaluating acquisitions to ensure that they meet our financial, technical and other criteria. We expect to continue to acquire additional assets as a part of our growth strategy. We intend to aggressively manage and lease our assets to increase their cash flow. We intend to continue to build out our redevelopment portfolio when justified by anticipated returns.

We may acquire properties subject to existing mortgage financing and other indebtedness or we may incur new indebtedness in connection with acquiring or refinancing these properties. Debt service on such indebtedness will have a priority over any cash dividends with respect to Digital Realty Trust, Inc.’s common stock and preferred stock. We currently intend to limit our indebtedness to 60% of our total enterprise value and, based on the closing price of Digital Realty Trust, Inc. common stock on March 31, 2011 of $58.14, our ratio of debt to total enterprise value was approximately 33% as of March 31, 2011. Our total enterprise value is defined as the sum of the market value of Digital Realty Trust, Inc.’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our company’s incentive award plan, plus the liquidation value of Digital Realty Trust, Inc.’s preferred stock, plus the aggregate value of our operating partnership’s units not held by Digital Realty Trust, Inc. (with the per unit value equal to the market value of one share of its common stock and excluding long-term incentive units and Class C units), plus the book value of our total consolidated indebtedness.

Revenue base. As of March 31, 2011, we owned 96 properties through our operating partnership, excluding two properties held as investments in unconsolidated joint ventures. These properties are mainly located throughout the U.S., with 14 properties located in Europe, one property in Asia and one property in Canada. We, through our predecessor, acquired our first portfolio property in January 2002 and have added properties as follows:

Year Ended December 31:	Properties Acquired  (1)		Net Rentable Square Feet (2)		Square Feet of Space Held for Redevelopment as of March 31, 2011 (3)
2002		5		1,125,292		19,890
2003		6		1,056,437		1,923
2004		10		2,489,367		197,102
2005		20		3,329,834		180,463
2006		16		2,114,790		106,808
2007 (4)		13		1,802,001		218,088
2008		5		266,776		297,472
2009		6		721,207		676,100
2010		15		1,722,563		538,899
Properties owned as of March 31, 2011		96		14,628,267		2,236,745

(1) Excludes properties sold in 2007 and 2006: 100 Technology Center Drive (March 2007), 4055 Valley View Lane (March 2007) and 7979 East Tufts Avenue (July 2006). Also excludes a leasehold interest acquired in March 2007 related to an acquisition made in 2006.

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(2) Current net rentable square feet as of March 31, 2011, which represents the current square feet at buildings under lease as specified in the applicable lease agreements plus management’s estimate of space available for lease based on engineering drawings. Includes tenants’ proportional share of common areas but excludes space held for redevelopment.

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(3) Redevelopment space is unoccupied space that requires significant capital investment in order to develop datacenter facilities that are ready for use. Most often this is shell space. However, in certain circumstances this may include partially built datacenter space that was not completed by previous ownership and requires a large capital investment in order to build out the space. The amounts included in this table represent redevelopment space as of March 31, 2011 in the properties acquired during the relevant period.

(4) Includes two developed buildings (43915 Devin Shafron Drive and 43830 Devin Shafron Drive) placed into service in 2010 and 2011 that are being included with a property (Devin Shafron buildings) that was acquired in 2007.

As of March 31, 2011, the properties in our portfolio were approximately 93.5% leased excluding 2.2 million square feet held for redevelopment. Due to the capital-intensive and long-term nature of the operations being supported, our lease terms are generally longer than standard commercial leases. As of March 31, 2011, our original average lease term was approximately 14 years, with an average of approximately seven years remaining. The majority of our leasing since the completion of our IPO has been at lease terms shorter than 12 years. Our lease expirations through December 31, 2012 are 8.3% of rentable square feet excluding space held for redevelopment as of March 31, 2011.

Operating revenues from properties outside the United States were $25.7 million and $23.2 million for the three months ended March 31, 2011 and 2010, respectively.

Factors Which May Influence Future Results of Operations

Global market and economic conditions

In the United States and globally, market and economic conditions have been unprecedented over the past few years and challenging with tighter credit conditions and slower economic growth in all markets in which we own properties and conduct our operations. The U.S. and global economies have experienced a recession and face continued concerns about the systemic impact of adverse economic conditions, such as high energy costs, geopolitical issues, the availability and cost of credit, unstable global financial and mortgage markets, high corporate, consumer and governmental debt levels, high unemployment and declining residential and commercial real estate markets.

As a result of these conditions, general economic conditions and the cost and availability of capital have been and may again be adversely affected in some or all of the markets in which we own properties and conduct our operations. Renewed or increased turbulence in the U.S., European and other international financial markets and economies may adversely affect our ability, and the ability of our tenants, to replace or renew maturing liabilities on a timely basis, access the capital markets to meet liquidity and capital expenditure requirements and may result in adverse effects on our, and our tenants’, financial condition and results of operations.

In addition, our access to funds under our revolving credit facility and other lines of credit depend on the ability of the lenders that are parties to such facilities to meet their funding commitments to us. We cannot assure you that long-term disruptions in the global economy and the return of tighter credit conditions among, and potential failures or nationalizations of, third party financial institutions as a result of such disruptions will not have an adverse effect on our lenders. If our lenders are not able to meet their funding commitments to us, our business, results of operation, cash flows and financial condition could be adversely affected.

If we do not have sufficient cash flow to continue operating our business and are unable to borrow additional funds, access our existing lines of credit or raise equity or debt capital, we may need to find alternative ways to increase our liquidity. Such alternatives may include, without limitation, curtailing development or redevelopment activity, disposing of one or more of our properties possibly on disadvantageous terms or entering into or renewing leases on less favorable terms than we otherwise would.

Rental income. The amount of rental income generated by the properties in our portfolio depends principally on our ability to maintain or improve the occupancy rates of currently leased space and to lease currently available space and space available from lease terminations. Excluding 2.2 million square feet held for redevelopment, as of March 31, 2011, the occupancy rate of the properties in our portfolio was approximately 93.5% of our net rentable square feet.

The amount of rental income generated by us also depends on our ability to maintain or increase rental rates at our properties. Included in our approximately 14.7 million net rentable square feet, excluding redevelopment space, at March 31, 2011 is approximately 232,000 net rentable square feet of space with extensive datacenter improvements that is currently, or will shortly be, available for lease. Since our IPO, we have leased approximately 2,472,000 square feet of similar space. These Turn-Key Datacenters^® are effective solutions for tenants who lack the expertise or capital budget to provide their own extensive datacenter infrastructure and security. Our expertise in datacenter construction and operations enables us to lease space to these tenants at a significant premium over other uses. In addition, as of March 31, 2011, we had approximately 2.2 million square feet of redevelopment space, or approximately 13% of the total rentable space in our portfolio, including four vacant properties comprising approximately 409,000 square feet. Our ability to grow earnings depends in part on our ability to redevelop space and lease redevelopment space at favorable rates, which we may not be able to obtain. Redevelopment space requires significant capital investment in order to develop datacenter facilities that are ready for use and, in addition, we may require additional time or encounter delays in securing tenants for redevelopment space. We may purchase additional vacant properties and properties with vacant

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redevelopment space in the future. We will require additional capital to finance our redevelopment activities, which may not be available or may not be available on terms acceptable to us, including as a result of the conditions described above under “Global market and economic conditions.”

Economic downturns, including as a result of the conditions described above under “Global market and economic conditions,” or regional downturns affecting our sub-markets or downturns in the technology-related real estate industry that impair our ability to lease or renew or re-lease space, or otherwise reduce returns on our investments or the ability of our tenants to fulfill their lease commitments, as in the case of tenant bankruptcies, could adversely affect our ability to maintain or increase rental rates at our properties. As of March 31, 2011, we had no material tenants in bankruptcy.

Scheduled lease expirations. Our ability to re-lease expiring space at rental rates equal to or in excess of current rental rates will impact our results of operations. In addition to approximately 0.9 million square feet of available space in our portfolio, which excludes approximately 2.2 million square feet available for redevelopment as of March 31, 2011, leases representing approximately 6.0% and 2.3% of the net rentable square footage of our portfolio are scheduled to expire during the nine months ending December 31, 2011 and for the year ending December 31, 2012, respectively.

Market concentration. We depend on the market for technology-based real estate in specific geographic regions and significant changes in these regional markets can impact our future results. As of March 31, 2011, our portfolio was geographically concentrated in the following metropolitan markets:

Metropolitan Market	March 31, 2011 total annualized rent (1)
Silicon Valley		14.2	%
Northern Virginia		10.4	%
San Francisco		10.0	%
New York Metro		9.8	%
Chicago		9.7	%
Phoenix		8.9	%
Dallas		8.2	%
Boston		6.0	%
Los Angeles		4.8	%
London, England		4.3	%
Dublin, Ireland		2.8	%
Paris, France		2.6	%
Other		8.3	%
		100.0	%

(1) Annualized rent is monthly contractual rent under existing leases as of March 31, 2011 multiplied by 12.

Operating expenses. Our operating expenses generally consist of utilities, property and ad valorem taxes, property management fees, insurance and site maintenance costs, as well as rental expenses on our ground and building leases. In particular, our buildings require significant power to support the datacenter operations contained in them. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses and real estate taxes under our leases for Turn-Key Datacenters^®. We also incur general and administrative expenses, including expenses relating to our asset management function, as well as significant legal, accounting and other expenses related to corporate governance, SEC reporting and compliance with the various provisions of the Sarbanes-Oxley Act. Increases or decreases in such operating expenses will impact our overall performance. We expect to incur additional operating expenses as we continue to expand.

Climate change legislation. In June 2009, the U.S. House of Representatives approved comprehensive clean energy and climate change legislation intended to cut greenhouse gas, or GHG, emissions, create new clean energy jobs and enhance the energy independence of the United States, which included a cap-and-trade program for GHG emissions. The U.S. Senate did not pass similar legislation during 2009 or 2010, and following Congressional elections in November 2010 (in which control of the House of Representatives passed from the Democratic Party to the Republican Party), the likelihood that Congress will pass any climate change and/or energy legislation that would include a cap-and-trade program, or any similar type program, for GHG emissions in 2011 has diminished. As a result, action to reduce GHG emissions likely will be focused on regulatory agencies, primarily the U.S. Environmental Protection Agency, or EPA, and state actions. The EPA has been moving aggressively to regulate GHG emissions

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from automobiles and large stationary sources, including electricity producers, using its own authority under the Clean Air Act. Some of those regulations have been finalized and currently are in litigation. States have also taken actions to regulate GHG emissions. For example, California enacted AB 32, the Global Warming Solutions Act of 2006, which established the first statewide program in the United States to limit GHG emissions and impose penalties for non-compliance. The California Air Resources Board, or CARB, has taken, and plans to take, various actions to implement AB 32, including the approval in December 2008 of an AB 32 Scoping Plan summarizing the main GHG-reduction strategies for California. CARB approved in December 2010 a GHG cap-and-trade program, which is scheduled to take effect in 2012. As another example of state action, the Western Climate Initiative, which currently includes seven states and four Canadian provinces, has developed GHG reduction strategies, among them a GHG cap-and-trade program. In addition, since 2005 the European Union (including the United Kingdom) has been operating under a cap-and-trade program, which directly affects the largest emitters of greenhouse gases, including electricity producers from whom we purchase power. Any additional taxation or regulation of energy use, including as a result of (i) new legislation that Congress may pass, (ii) the regulations that the U.S. EPA has proposed or finalized, (iii) regulations under legislation that states have passed or may pass, or (iv) any further reductions in the EU greenhouse gas cap could significantly increase our costs, and we may not be able to effectively pass all of these costs on to our tenants.

Interest rates. As of March 31, 2011, we had approximately $284.2 million of variable rate debt, all of which was mortgage debt subject to interest rate cap or swap agreements, and $209.7 million was outstanding on our revolving credit facility. The availability of debt and equity capital has significantly decreased as a result of the circumstances described above under “Global market and economic conditions.” The effects on commercial real estate mortgages, if available, include, but may not be limited to: higher loan spreads, tightened loan covenants, reduced loan to value ratios resulting in lower borrower proceeds and higher principal payments. Potential future increases in interest rates and credit spreads may increase our interest expense and fixed charges and negatively affect our financial condition and results of operations, potentially impacting our future access to the debt and equity capital markets. Increased interest rates may also increase the risk that the counterparties to our swap agreements will default on their obligations, which could further increase our interest expense. If we cannot obtain capital from third party sources, we may not be able to acquire or develop properties when strategic opportunities exist, satisfy our debt service obligations or pay the cash dividends to Digital Realty Trust, Inc.’s stockholders necessary to maintain its qualification as a REIT.

Demand for datacenter space. Our portfolio of properties consists primarily of technology-related real estate and datacenter real estate in particular. A decrease in the demand for, or increase in supply of, datacenter space, Internet gateway facilities or other technology-related real estate would have a greater adverse effect on our business and financial condition than if we owned a portfolio with a more diversified tenant base or less specialized use. Our redevelopment activities make us particularly susceptible to general economic slowdowns, including recessions and the other circumstances described above under “Global market and economic conditions,” as well as adverse developments in the corporate datacenter, Internet and data communications and broader technology industries. Any such slowdown or adverse development could lead to reduced corporate IT spending or reduced demand for datacenter space. Reduced demand could also result from business relocations, including to markets that we do not currently serve. Changes in industry practice or in technology, such as virtualization technology, more efficient computing or networking devices, or devices that require higher power densities than today’s devices, could also reduce demand for the physical datacenter space we provide or make the tenant improvements in our facilities obsolete or in need of significant upgrades to remain viable. In addition, the development of new technologies, the adoption of new industry standards or other factors could render many of our tenants’ current products and services obsolete or unmarketable and contribute to a downturn in their businesses, thereby increasing the likelihood that they default under their leases, become insolvent or file for bankruptcy. In addition, demand for datacenter space in our properties, or the rates at which we lease space, may be adversely impacted either across our portfolio or in specific submarkets as a result of an increase in the number of competitors, or the amount of space being offered in our markets and other markets by our competitors.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses in the reporting period. Our actual results may differ from these estimates. We have provided a summary of our significant accounting policies in note 2 to our condensed consolidated financial statements included elsewhere in this report. We describe below those accounting policies that require material subjective or complex judgments and that have the most significant impact on our financial condition and consolidated results of operations. Our management evaluates these estimates on an ongoing basis, based upon information currently available and on various assumptions management believes are reasonable as of the date on the front cover of this report.

Investments in Real Estate

Acquisition of real estate. The price that we pay to acquire a property is impacted by many factors including the condition of the property and improvements, the occupancy of the building, the existence of above and below market tenant leases, the creditworthiness of the tenants, favorable or unfavorable financing, above or below market ground leases and numerous other factors.

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Accordingly, we are required to make subjective assessments to allocate the purchase price paid to acquire investments in real estate among the assets acquired and liabilities assumed based on our estimate of the fair values of such assets and liabilities. This includes determining the value of the property and improvements, land, any ground leases, tenant improvements, in-place tenant leases, tenant relationships, the value (or negative value) of above (or below) market leases, any debt or deferred taxes assumed from the seller or loans made by the seller to us and any building leases assumed from the seller. Each of these estimates requires a great deal of judgment and some of the estimates involve complex calculations. These allocation assessments have a direct impact on our results of operations. For example, if we were to allocate more value to land, there would be no depreciation with respect to such amount. If we were to allocate more value to the property as opposed to allocating to the value of in-place tenant leases, this amount would be recognized as an expense over a much longer period of time. This potential effect occurs because the amounts allocated to property are depreciated over the estimated lives of the property whereas amounts allocated to in-place tenant leases are amortized over the estimated term (including renewal and extension assumptions) of the leases. Additionally, the amortization of the value (or negative value) assigned to above (or below) market rate leases is recorded as an adjustment to rental revenue as compared to amortization of the value of in-place tenant leases and tenant relationships, which is included in depreciation and amortization in our consolidated statements of operations.

Useful lives of assets. We are required to make subjective assessments as to the useful lives of our properties for purposes of determining the amount of depreciation to record on an annual basis with respect to our investments in real estate. These assessments have a direct impact on our net income because if we were to shorten the expected useful lives of our investments in real estate we would depreciate such investments over fewer years, resulting in more depreciation expense and lower net income on an annual basis.

Asset impairment evaluation. We review each of our properties for indicators that its carrying amount may not be recoverable. Examples of such indicators may include a significant decrease in the market price of the property, a significant adverse change in the extent or manner in which the property is being used in its physical condition or expected to be used based on the underwriting at the time of acquisition, an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of the property, or a history of operating or cash flow losses of the property. When such impairment indictors exist, we review an estimate of the future cash flows (excluding interest charges) expected to result from the real estate investment’s use and eventual disposition and compare that estimate to the carrying value of the property. We consider factors such as future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If our undiscounted net cash flow evaluation indicates that we are unable to recover the carrying value of a real estate investment, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair value of the property. These losses have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Since cash flows on properties considered to be long-lived assets to be held and used are considered on an undiscounted basis to determine whether the carrying value of a property is recoverable, our strategy of holding properties over the long-term directly decreases the likelihood of their carrying values not being recoverable and therefore requiring the recording of an impairment loss. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized and such loss could be material. If we determine that the asset fails the recoverability test, the affected assets must be reduced to their fair value. No such impairment losses have been recognized to date.

We generally estimate the fair value of rental properties utilizing a discounted cash flow analysis that includes projections of future revenues, expenses and capital improvement costs that a market participant would use based on the highest and best use of the asset, which is similar to the income approach that is commonly utilized by appraisers.

Revenue Recognition

Rental income is recognized using the straight-line method over the terms of the tenant leases. Deferred rents included in our consolidated balance sheets represent the aggregate excess of rental revenue recognized on a straight-line basis over the contractual rental payments that would be received under the remaining terms of the leases. Many of our leases contain provisions under which the tenants reimburse us for a portion of property operating expenses and real estate taxes incurred by us. However, we generally are not entitled to reimbursement of property operating expenses, other than utility expense, and real estate taxes under our leases for Turn-Key Datacenters^®. Such reimbursements are recognized in the period that the expenses are incurred. Lease termination fees are recognized over the remaining term of the lease, effective as of the date the lease modification is finalized, assuming collection is not considered doubtful. As discussed above, we recognize amortization of the value of acquired above or below market tenant leases as a reduction of rental income in the case of above market leases or an increase to rental revenue in the case of below market leases.

We must make subjective estimates as to when our revenue is earned and the collectability of our accounts receivable related to minimum rent, deferred rent, expense reimbursements, lease termination fees and other income. We specifically analyze accounts receivable and historical bad debts, tenant concentrations, tenant creditworthiness and current economic trends when evaluating the adequacy of the allowance for bad debts. These estimates have a direct impact on our net income because a higher bad debt allowance would result in lower net income, and recognizing rental revenue as earned in one period versus another would result in higher or lower net income for a particular period.

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Share-based Awards

We recognize compensation expense related to share-based awards. We generally amortize this compensation expense over the vesting period of the award. The calculation of the fair value of share-based awards is subjective and requires several assumptions over such items as expected stock volatility, dividend payments and future company results. These assumptions have a direct impact on our net income because a higher share-based awards amount would result in lower net income for a particular period.

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Results of Operations

The discussion below relates to our financial condition and results of operations for the three months ended March 31, 2011 and 2010. A summary of our operating results for the three months ended March 31, 2011 and 2010 is as follows (in thousands):

	Three Months Ended March 31,
	2011			2010
Statement of Operations Data:
Total operating revenues	$	250,741		$	191,779
Total operating expenses		(176,076	)		(136,584	)
Operating income		74,665			55,195
Other expenses, net		(35,653	)		(29,609	)
Net income	$	39,012		$	25,586

Our property portfolio has experienced consistent and significant growth since the first property acquisition in January 2002. As a result of this growth, our period-to-period comparison of our financial performance focuses on the impact on our revenues and expenses resulting both from the new property additions to our portfolio, as well as on a “same store” property basis (same store properties are properties that were owned and operated for the entire current period and the entire immediate preceding year). The following table identifies each of the properties in our portfolio acquired from January 1, 2010 through March 31, 2011.

Acquired Buildings			Acquisition Date		Redevelopment Space as of March 31, 2011 (1)		Net Rentable Square Feet Excluding Redevelopment Space (2)		Square Feet Including Redevelopment Space		Occupancy Rate as of March 31, 2011  (3)
As of December 31, 2009 (81 properties)						1,594,805		12,763,215		14,358,020		93.8	%
January 1, 2010 through March 31, 2011
128 First Avenue				Jan-10		—		274,750		274,750		99.6
55 Middlesex Turnpike				Jan-10		—		106,000		106,000		89.7
60-80 Merritt Boulevard				Jan-10		—		169,540		169,540		100.0
43915 Devin Shafron Drive	(4	)		Jan-10		6,588		125,692		132,280		100.0
1725 Comstock Street				Apr-10		—		39,643		39,643		66.7
3105 and 3115 Alfred Street				May-10		24,005		25,853		49,858		100.0
Cateringweg 5				Jun-10		55,972		—		55,972		—
365 Main Street				Jul-10		—		226,981		226,981		84.8
720 2nd Street				Jul-10		—		121,220		121,220		97.3
2260 East El Segundo Boulevard				Jul-10		—		132,240		132,240		100.0
2121 South Price Road				Jul-10		—		293,479		293,479		96.5
4030-4050 La Fayette				Jul-10		—		145,403		145,403		80.8
800 Central Expressway				Aug-10		150,000		—		150,000		—
2950 Zanker Road				Aug-10		—		69,700		69,700		100.0
900 Dorothy Drive				Aug-10		—		56,176		56,176		100.0
29A International Business Park				Nov-10		308,922		61,578		370,500		16.8
43830 Devin Shafron Drive	(4	)		Mar-11		96,453		16,797		113,250		27.0
Subtotal						641,940		1,865,052		2,506,992		90.9	%
Total						2,236,745		14,628,267		16,865,012		93.5	%

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(1) Redevelopment space requires significant capital investment in order to develop datacenter facilities that are ready for use. Most often this is shell space. However, in certain circumstances this may include partially built datacenter space that was not completed by previous ownership and requires a large capital investment in order to build out the space.

(2) Net rentable square feet at a building represents the current square feet at that building under lease as specified in the lease agreements plus management’s estimate of space available for lease based on engineering drawings. Net rentable square feet includes tenants’ proportional share of common areas but excludes space held for redevelopment.

(3) Occupancy rates exclude redevelopment space. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(4) Represents two developed buildings placed into service in 2010 and 2011 that are being included with a property (Devin Shafron buildings) that was acquired in 2007.

In May 2008, we acquired 701 & 717 Leonard Street, a parking garage in Dallas, Texas; however, we exclude the acquisition from our property count because it is located adjacent to our internet gateway datacenter located at 2323 Bryan Street and is not considered a separate property.

Comparison of the Three Months Ended March 31, 2011 to the Three Months Ended March 31, 2010

Portfolio

As of March 31, 2011, our portfolio consisted of 96 properties, excluding two properties held as investments in unconsolidated joint ventures, with an aggregate of 16.9 million net rentable square feet including 2.2 million square feet held for redevelopment compared to a portfolio consisting of 84 properties, excluding one property held as an investment in an unconsolidated joint venture, with an aggregate of 15.0 million net rentable square feet including 1.8 million square feet held for redevelopment as of March 31, 2010. The increase in our portfolio reflects the acquisition of 12 properties in the twelve months ended March 31, 2011.

Operating Revenues

Operating revenues during the three months ended March 31, 2011 and 2010 were as follows (in thousands):

	Three Months Ended March 31,
	2011		2010		Change
Rental	$	196,795	$	151,306	$	45,489
Tenant reimbursements		51,834		39,059		12,775
Construction management fee		1,817		1,414		403
Other		295		—		295
Total operating revenues	$	250,741	$	191,779	$	58,962

As shown by the same store and new properties table below, the increases in rental revenues and tenant reimbursement revenues for the three month period ended March 31, 2011 compared to the same period in 2010 were primarily due to new leasing at our same store properties and acquisition of properties. We acquired 12 properties during the twelve months ended March 31, 2011.

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The following table shows operating revenues for new properties (properties that were acquired after December 31, 2009) and same store properties (all other properties) (in thousands):

	Same Store						New Properties
	Three Months Ended March 31,						Three Months Ended March 31,
	2011		2010		Change		2011		2010		Change
Rental	$	153,169	$	142,035	$	11,134	$	43,626	$	9,271	$	34,355
Tenant reimbursements		38,418		35,839		2,579		13,416		3,220		10,196
Construction management fee		—		—		—		1,817		1,414		403
Other		295		—		295		—		—		—
Total operating revenues	$	191,882	$	177,874	$	14,008	$	58,859	$	13,905	$	44,954

Same store rental revenues increased for the three months ended March 31, 2011 compared to the same period in 2010 primarily as a result of new leases at our properties during the twelve months ended March 31, 2011 due to strong demand for datacenter space, including leases of completed redevelopment space, the largest of which was for space in 43915 Devin Shafron Drive, 365 South Randolphville Road and 1232 Alma Road. Rental revenue included amounts earned from leases with tel(x) and SoftLayer, both related parties, of approximately $11.1 million and $5.1 million for the three months ended March 31, 2011 and 2010, respectively. Same store tenant reimbursement revenues increased for the three months ended March 31, 2011 as compared to the same period in 2010 primarily as a result of new leasing and higher utility and operating expenses being billed to our tenants, the largest occurrences of which were at 43915 Devin Shafron Drive, 3 Corporate Place, 120 East Van Buren and 1500 Space Park Drive.

For the three months ended March 31, 2011, 2121 South Price Road, 365 Main Street, 720 2^nd Street, 2260 East El Segundo and 128 First Avenue contributed $34.6 million, or approximately 77%, of the new properties increase in total revenues compared to the same period in 2010.

Operating Expenses and Interest Expense

Operating expenses and interest expense during the three months ended March 31, 2011 and 2010 were as follows (in thousands):

	Three Months Ended March 31,
	2011		2010		Change
Rental property operating and maintenance	$	71,723	$	52,595	$	19,128
Property taxes		13,471		12,721		750
Insurance		2,051		1,735		316
Construction management		1,737		647		1,090
Depreciation and amortization		73,918		57,532		16,386
General and administrative		12,405		10,519		1,886
Transactions		681		833		(152	)
Other		90		2		88
Total operating expenses	$	176,076	$	136,584	$	39,492
Interest expense	$	36,082	$	30,902	$	5,180

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As shown in the same store and new properties table below, total expenses for the three months ended March 31, 2011 increased compared to the same period in 2010 primarily as a result of higher same store utility and maintenance costs as well as increased depreciation and interest expense from additional redevelopment projects placed into service and from recently acquired properties.

The following table shows expenses for new properties (properties that were acquired after December 31, 2009) and same store properties (all other properties) (in thousands):

	Same Store							New Properties
	Three Months Ended March 31,							Three Months Ended March 31,
	2011		2010		Change			2011		2010		Change
Rental property operating and maintenance	$	51,523	$	48,145	$	3,378		$	20,200	$	4,450	$	15,750
Property taxes		10,978		11,464		(486	)		2,493		1,257		1,236
Insurance		1,542		1,662		(120	)		509		73		436
Construction management		—		—		—			1,737		647		1,090
Depreciation and amortization		58,668		54,349		4,319			15,250		3,183		12,067
General and administrative (1)		12,405		10,519		1,886			—		—		—
Transactions		—		—		—			681		833		(152	)
Other		90		2		88			—		—		—
Total operating expenses	$	135,206	$	126,141	$	9,065		$	40,870	$	10,443	$	30,427
Interest expense	$	35,913	$	30,902	$	5,011		$	169	$	—	$	169

(1) General and administrative expenses are included in same store as they are not allocable to specific properties.

Same store rental property operating and maintenance expenses increased in the three months ended March 31, 2011 compared to the same period in 2010 primarily as a result of higher utility rates in several of our properties along with redevelopment projects being placed into service leading to higher utility expense in 2011. We capitalized amounts relating to compensation expense of employees directly engaged in construction and leasing activities of $6.2 million and $4.2 million for the three months ended March 31, 2011 and 2010, respectively.

Same store depreciation and amortization expense increased in the three months ended March 31, 2011 compared to the same period in 2010, principally because of depreciation of redevelopment projects that were placed into service in the final nine months of 2010 and during 2011.

General and administrative expenses for the three months ended March 31, 2011 increased compared to the same period in 2010 primarily due to the growth of our company, which resulted in more employees, additional incentive compensation, and higher professional fees and marketing expenses.

Transactions expense decreased in the three months ended March 31, 2011 compared to the same period in 2010, principally because of higher expenses related to the acquisition of the New England Portfolio in 2010.

Same store interest expense increased for the three months ended March 31, 2011 as compared to the same period in 2010 primarily as a result of higher average outstanding debt balances during 2011 compared to 2010 primarily due to the issuance of our 5.875% Notes due 2020, the issuance of our 4.50% Notes due 2015, the issuance of our 5.250% Notes due 2021 and draws on our Prudential shelf facility. During the three months ended March 31, 2011 and 2010, we capitalized interest of approximately $4.7 million and $1.9 million, respectively.

New properties increases were caused by properties acquired during the period from January 1, 2010 to March 31, 2011. For the three months ended March 31, 2011, 365 Main Street, 2121 South Price Road, 720 2^nd Street and 2260 East El Segundo contributed $20.5 million, or approximately 68%, of the new properties increase in total operating expenses compared to the same period in 2010.

Liquidity and Capital Resources of the Parent Company

In this “Liquidity and Capital Resources of the Parent Company” section and in the “Liquidity and Capital Resources of the Operating Partnership” section below, the term, our “parent company,” refers to Digital Realty Trust, Inc. on an unconsolidated basis, excluding our operating partnership.

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Analysis of Liquidity and Capital Resources

Our parent company’s business is operated primarily through our operating partnership of which our parent company is the sole general partner and which it consolidates for financial reporting purposes. Because our parent company operates on a consolidated basis with our operating partnership, 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 our parent company on a consolidated basis and how our company is operated as a whole.

Our parent company issues public equity from time to time, but does not otherwise generate any capital itself or conduct any business itself, other than incurring certain expenses in operating as a public company which are fully reimbursed by the operating partnership. Our parent company itself does not hold any indebtedness other than guarantees of indebtedness of our operating partnership, and its only material asset is its ownership of partnership interests of our operating partnership. Therefore, the consolidated assets and liabilities and the consolidated revenues and expenses of our parent company and our operating partnership are the same on their respective financial statements, except for immaterial differences related to cash, other assets and accrued liabilities that arise from public company expenses paid by our parent company. However, all debt is held directly or indirectly at the operating partnership level. Our parent company’s principal funding requirement is the payment of dividends on its common and preferred shares. Our parent company’s principal source of funding for its dividend payments is distributions it receives from our operating partnership.

As the sole general partner of our operating partnership, our parent company has the full, exclusive and complete responsibility for our operating partnership’s day-to-day management and control. Our parent company causes our operating partnership to distribute such portion of its available cash as our parent company may in its discretion determine, in the manner provided in our operating partnership’s partnership agreement. Our parent company receives proceeds from its equity issuances from time to time, but is required by our operating partnership’s partnership agreement to contribute the proceeds from its equity issuances to our operating partnership in exchange for partnership units of our operating partnership.

Our parent company is a well-known seasoned issuer with an effective shelf registration statement filed on May 1, 2009, as amended by Post-Effective Amendment No. 1 filed on November 15, 2010, that allows our parent company to register unspecified various classes of equity securities. As circumstances warrant, our parent company may issue equity from time to time on an opportunistic basis, dependent upon market conditions and available pricing. Any proceeds from such equity issuances would be contributed to our operating partnership in exchange for additional equity interests in our operating partnership. Our operating partnership may use the proceeds to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt or preferred securities.

The liquidity of our parent company is dependent on our operating partnership’s ability to make sufficient distributions to our parent company. The primary cash requirement of our parent company is its payment of dividends to its stockholders. Our parent company also guarantees some of our operating partnership’s unsecured debt. If our operating partnership fails to fulfill its debt requirements, which trigger parent company guarantee obligations, then our parent company will be required to fulfill its cash payment commitments under such guarantees. However, our parent company’s only asset is its investment in our operating partnership.

We believe our operating partnership’s sources of working capital, specifically its cash flow from operations, and borrowings available under its unsecured revolving credit facility, are adequate for it to make its distribution payments to our parent company and, in turn, for our parent company to make its dividend payments to its stockholders. However, we cannot assure you that our 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 distribution payments to our parent company. The unavailability of capital could adversely affect our operating partnership’s ability to pay its distributions to our parent company, which would in turn, adversely affect our parent company’s ability to pay cash dividends to its stockholders.

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On December 31, 2009, our parent company entered into equity distribution agreements, which we refer to as the Original Equity Distribution Agreements, with each of Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Credit Suisse Securities (USA) LLC, or the Original Agents, under which it could issue and sell shares of its common stock having an aggregate offering price of up to $400,000,000 from time to time through, at its discretion, any of the Original Agents as its sales agents. On January 22, 2010, our parent company amended and restated each Original Equity Distribution Agreement with the applicable Original Agent, and also entered into a new equity distribution agreement with Morgan Stanley & Co. Incorporated, or collectively the Equity Distribution Agreements, under which it may issue and sell shares of its common stock having an aggregate offering price of up to $400,000,000 (including the approximately 1.1 million shares of common stock having an aggregate offering price of approximately $54.3 million sold pursuant to the Original Equity Distribution Agreements as of January 22, 2010), from time to time through, at its discretion, any of the Original Agents or Morgan Stanley & Co. Incorporated as its sales agents. On March 2, 2011, the Equity Distribution Agreements were amended to amend certain representations. The sales of common stock made under the Equity Distribution Agreements will be made in “at the market” offerings as defined in Rule 415 of the Securities Act of 1933, as amended. Our parent company has used and intends to use the proceeds from the sale of shares pursuant to the Equity Distribution Agreements to temporarily repay borrowings under our operating partnership’s revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general corporate purposes, including potentially the repayment or repurchase of outstanding debt. For the three months ended March 31, 2011, our parent company generated net proceeds of approximately $5.6 million from the issuance of approximately 0.1 million common shares under the Equity Distribution Agreements at an average price of $58.44 per share after payment of approximately $0.1 million of commissions to the sales agents. The proceeds from the issuances were contributed to our operating partnership in exchange for the issuance of approximately 0.1 million common units to our parent company. For the three months ended March 31, 2010, our parent company generated net proceeds of approximately $54.8 million from the issuance of approximately 1.1 million common shares under the Equity Distribution Agreements at an average price of $50.56 per share after payment of approximately $0.8 million of commissions to the sales agents. The proceeds from the issuances were contributed to our operating partnership in exchange for the issuance of approximately 1.1 million common units to our parent company.

During the three months ended March 31, 2011, we exchanged approximately $35.9 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $47.6 million) and 303,073 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. There were no exchanges of our 2026 Debentures during the three months ended March 31, 2010.

Future Uses of Cash

Our parent company may from time to time seek to retire, redeem or repurchase its preferred equity or the debt securities of our operating partnership through cash purchases and/or exchanges for equity securities in open market purchases, privately negotiated transactions or otherwise. Such repurchases, redemptions or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

We are also subject to the commitments discussed below under “Dividends and Distributions.”

Dividends and Distributions

Our parent company is required to distribute 90% of its taxable income (excluding capital gains) on an annual basis in order for it to continue to qualify as a REIT for federal income tax purposes. Accordingly, our parent company intends to make, but is not contractually bound to make, regular quarterly distributions to its preferred stockholders and common stockholders from cash flow from our operating partnership’s operating activities. All such distributions are at the discretion of our parent company’s board of directors. Our parent company considers market factors and our operating partnership’s performance in addition to REIT requirements in determining distribution levels. Our parent company has distributed 100% of its taxable income since inception to minimize corporate level federal income taxes. Amounts accumulated for distribution to stockholders are invested primarily in interest-bearing accounts and short-term interest-bearing securities, which are consistent with our intention to maintain our parent company’s status as a REIT. The exchange rate on the 2026 Debentures, the exchange rate on the 2029 Debentures, the conversion rate on our parent company’s series C cumulative convertible preferred stock and the conversion rate on our parent company’s series D cumulative convertible preferred stock are each subject to adjustment for certain events, including, but not limited to, certain dividends on our parent company’s common stock in excess of $0.265 per share per quarter, $0.33 per share per quarter, $0.28625 per share per quarter and $0.31 per share per quarter, respectively. Therefore, the declaration and payment of quarterly dividends by our parent company in excess of these thresholds may increase the dilutive impact of our operating partnership’s exchangeable debentures and our parent company’s convertible preferred stock on our parent company’s common stockholders.

While historically our parent company has satisfied this distribution requirement by making cash distributions to its stockholders, it may choose to satisfy this requirement by making distributions of cash or other property, including, in limited circumstances, our parent company’s own shares. As a result of this distribution requirement, our operating partnership cannot rely on retained earnings to fund its on-going operations to the same extent that other companies whose parent companies are not REITs can. Our parent company may need to continue to raise capital in the equity markets to fund our operating partnership’s working capital

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needs, as well as potential developments at new or existing properties, acquisitions or investments in existing or newly created joint ventures. In addition, our parent company may be required to use borrowings under our operating partnership’s revolving credit facility, if necessary, to meet REIT distribution requirements and maintain our parent company’s REIT status.

During the three months ended March 31, 2011, our parent company declared the following dividends (in thousands):

Date dividend declared	Dividend payable date		Series C Preferred Stock (1)		Series D Preferred Stock (2)		Common Stock  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	62,459
			$	1,832	$	4,690	$	62,459

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(1) $1.094 annual rate of dividend per share.

(2) $1.375 annual rate of dividend per share.

(3) $2.720 annual rate of dividend per share.

Distributions out of our current or accumulated earnings and profits are generally classified as ordinary income whereas distributions in excess of our current and accumulated earnings and profits, to the extent of a stockholder’s U.S. federal income tax basis in our parent company’s stock, are generally classified as a return of capital. Distributions in excess of a stockholder’s U.S. federal income tax basis in our parent company’s stock are generally characterized as capital gain. Cash provided by operating activities has been sufficient to fund all distributions.

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 our operating partnership together with its consolidated subsidiaries or our operating partnership and our parent company together with their consolidated subsidiaries, as the text requires.

Analysis of Liquidity and Capital Resources

Our parent company is our sole general partner and consolidates our results of operations for financial reporting purposes. Because we operate on a consolidated basis with our parent company, the section entitled “Liquidity and Capital Resources of the Parent Company” should be read in conjunction with this section to understand our liquidity and capital resources on a consolidated basis.

As of March 31, 2011, we had $44.4 million of cash and cash equivalents, excluding $59.8 million of restricted cash. Restricted cash primarily consists of interest-bearing cash deposits required by the terms of several of our mortgage loans for a variety of purposes, including real estate taxes, insurance, anticipated or contractually obligated tenant improvements, as well as capital expenditures.

Our short-term liquidity requirements primarily consist of operating expenses, redevelopment costs and other expenditures associated with our properties, distributions to our parent company in order for it to make dividend payments on its preferred stock, distributions to our parent company in order for it to make dividend payments to its stockholders required to maintain its REIT status, distributions to the unitholders in our operating partnership, capital expenditures, debt service on our loans and, potentially, acquisitions. We expect to meet our short-term liquidity requirements through net cash provided by operations, restricted cash accounts established for certain future payments and by drawing upon our revolving credit facility.

As of March 31, 2011, our revolving credit facility had a total capacity of $750.0 million. Effective August 31, 2010, we exercised the first of two one-year extension options to our revolving credit facility, which extended its maturity date from August 31, 2010 to August 31, 2011. The bank group is obligated to grant extension options provided we give proper notice, we make certain representations and warranties and no default exists under the revolving credit facility. On June 28, 2010, we completed an amendment to our revolving credit facility. The amendment to the revolving credit facility provides us with the ability to add eligible unencumbered international assets to the borrowing base in support of our outstanding unsecured debt. International assets include properties located in Canada, England, Ireland, Wales, France, Spain, the Netherlands, Singapore and Australia. Under the new amendment, international assets may comprise up to 25% of the borrowing base, with assets in Spain and Singapore limited to up to 10% of the borrowing base. As of March 31, 2011, borrowings under the revolving credit facility bore interest at a blended rate of 1.35% (U.S), 2.01% (Euro) and 1.72% (GBP), which are based on 1-month LIBOR, 1-month EURIBOR and 1-month GBP LIBOR, respectively, plus a margin of 1.10%. The revolving credit facility has a $515.0 million sub-facility for multicurrency advances in British Pounds Sterling, Canadian Dollars, Euros, and Swiss Francs. We intend to use available borrowings under the revolving credit facility to, among other things, finance the acquisition of additional properties, fund tenant improvements and capital expenditures, fund development and redevelopment activities and to provide for working capital and other corporate purposes. As of March 31, 2011, approximately $209.7 million was drawn under this facility and $29.9 million of letters of credit were issued, leaving approximately $510.0 million available for use.

For a discussion of the potential impact of current global economic and market conditions on our liquidity and capital resources, see “—Factors Which May Influence Future Results of Operations—Global market and economic conditions” above.

On January 22, 2010, our parent company entered into the Equity Distribution Agreements discussed under “Liquidity and Capital Resources of the Parent Company” above. For the three months ended March 31, 2011, our parent company generated net proceeds of approximately $5.6 million from the issuance of approximately 0.1 million common shares under the Equity Distribution Agreements at an average price of $58.44 per share after payment of approximately $0.1 million of commissions to the sales agents. The proceeds from the issuances were contributed to us in exchange for the issuance of approximately 0.1 million common units to our parent

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company. For the three months ended March 31, 2010, our parent company generated net proceeds of approximately $54.8 million from the issuance of approximately 1.1 million common shares under the Equity Distribution Agreements at an average price of $50.56 per share after payment of approximately $0.8 million of commissions to the sales agents. The proceeds from the issuances were contributed to us in exchange for the issuance of approximately 1.1 million common units to our parent company.

On March 8, 2011, we closed the issuance of $400.0 million aggregate principal amount of the 2021 Notes. The purchase price paid by the initial purchasers was 99.775% of the principal amount thereof. The notes are our general unsecured senior obligations, rank equally in right of payment with all our other senior unsecured indebtedness and are fully and unconditionally guaranteed by our parent company. Interest on the notes is payable on March 15 and September 15 of each year, beginning on September 15, 2011. The net proceeds from the offering after deducting the original issue discount, underwriting commissions and estimated expenses was approximately $395.5 million. We used the net proceeds from the offering to temporarily repay borrowings under our revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general working capital purposes, including potentially for the repurchase, redemption or retirement of outstanding debt securities.

During the three months ended March 31, 2011, we exchanged approximately $35.9 million aggregate principal amount of our 2026 Debentures for a combination of cash (approximately $47.6 million) and 303,073 restricted shares of Digital Realty Trust, Inc. common stock at the request of holders pursuant to the terms of the indenture governing our 2026 Debentures. There were no exchanges of our 2026 Debentures during the three months ended March 31, 2010.

Construction

As of March 31, 2011 and December 31, 2010, work in progress, including the proportionate land and property costs related to current construction projects, amounted to $282.9 million, or $362.0 million including construction accruals and certain capitalized costs, and $202.0 million, or $274.8 million including construction accruals and certain capitalized costs, respectively. Separately, our redevelopment program included the proportionate land and building costs related to other targeted projects in the amount of $89.8 million and $184.0 million as of March 31, 2011 and December 31, 2010, respectively. Work in progress related to non-redevelopment projects, primarily tenant and building improvements, amounted to $1.8 million and $2.0 million as of March 31, 2011 and December 31, 2010, respectively.

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Future Uses of Cash

Our properties require periodic investments of capital for tenant-related capital expenditures and for general capital improvements. As of March 31, 2011, we had approximately 2.2 million square feet of redevelopment space and we also owned approximately 232,000 net rentable square feet of datacenter space with extensive installed tenant improvements that we may subdivide for Turn-Key Datacenter^® use during the next two years rather than lease to large single tenants. Turn-Key Datacenter^® space is move-in-ready space for the placement of computer and network equipment required to provide a datacenter environment. Depending on demand for additional Turn-Key Datacenter^® space, we expect to incur significant tenant improvement costs to build out and redevelop these types of spaces. At March 31, 2011, approximately 346,000 square feet of our space held for redevelopment was under construction for Turn-Key Datacenter^®, Powered Base Building^® and build-to-suit space in seven U.S. markets and two European markets. At March 31, 2011, we had commitments under construction contracts for approximately $102.2 million. We currently expect to incur approximately $325.0 million to $400.0 million of capital expenditures for our redevelopment program during the nine months ended December 31, 2011, although this amount may increase or decrease, potentially materially, based on numerous factors, including changes in demand, leasing results and availability of debt or equity capital.

We are also subject to the commitments discussed below under “Commitments and Contingencies,” “Off-Balance Sheet Arrangements” and “Distributions” as described below.

Consistent with our growth strategy, we actively pursue opportunities for potential acquisitions, with due diligence and negotiations often at different stages at different times. The dollar value of additional acquisitions for the remainder of the year ending December 31, 2011 will be based on numerous factors, including tenant demand, leasing results, availability of debt or equity capital and acquisition opportunities.

We may from time to time seek to retire or repurchase our outstanding debt or the preferred equity of our parent company through cash purchases and/or exchanges for equity securities of our parent company in open market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions or other factors. The amounts involved may be material.

We expect to meet our short-and long-term liquidity requirements, including to pay for scheduled debt maturities and to fund property acquisitions and non-recurring capital improvements with net cash from operations, future long-term secured and unsecured indebtedness and the issuance of equity and debt securities and the proceeds of equity issuances by our parent company. We also may fund future short-and long-term liquidity requirements, including property acquisitions and non-recurring capital improvements using our revolving credit facility pending permanent financing. If we are not able to obtain additional financing on terms attractive to us, or at all, including as a result of the circumstances described above under “Factors Which May Influence Future Results of Operations—Global market and economic conditions,” we may be required to reduce our acquisition or capital expenditure plans, which could have a material adverse effect upon our business and results of operations.

Distributions

All distributions on our units are at the discretion of our parent company’s board of directors. During the three months ended March 31, 2011, our operating partnership declared the following distributions (in thousands):

Date distribution declared	Distribution payable date		Series C Preferred Units (1)		Series D Preferred Units (2)		Common Units  (3)
February 10, 2011		March 31, 2011	$	1,832	$	4,690	$	66,252
			$	1,832	$	4,690	$	66,252

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(1) $1.094 annual rate of distribution per unit.

(2) $1.375 annual rate of distribution per unit.

(3) $2.720 annual rate of distribution per unit.

Commitments and Contingencies

We have agreed with the seller of 350 East Cermak Road to share a portion, not to exceed $135,000 per month, of rental revenue, adjusted for our costs to lease the premises, from the leases of the 192,000 square feet of space held for redevelopment at this property. This revenue sharing agreement will terminate in May 2012. We made payments of approximately $0.4 million and $10,000 to the seller during the three months ended March 31, 2011 and 2010, respectively. We have recorded approximately $1.9 million and $2.3 million for this contingent liability on our consolidated balance sheet at March 31, 2011 and December 31, 2010, respectively.

As part of the acquisition of Clonshaugh Industrial Estate I, we entered into an agreement with the seller whereby the seller is entitled to receive 40% of the net rental income generated by the existing building after we have received a 9% return on all capital invested in the property. As of February 6, 2006, the date we acquired this property, we have estimated the present value of these expected payments over the 10 year lease term to be approximately $1.1 million and this value has been recorded as a component of the purchase price. Accounts payable and other liabilities include $1.4 million and $1.3 million for this liability as of March 31, 2011 and December 31, 2010, respectively. There were no payments made to the seller during the three months ended March 31, 2011 and 2010.

As part of the acquisition of 29A International Business Park, the seller could earn additional consideration based on future net operating income growth in excess of certain performance targets, as defined. As of March 31, 2011, construction is not complete and there have been no leases executed that would cause an amount to become probable of payment and therefore no amount is accrued as of March 31, 2011. The maximum amount that could be earned by the seller is S$50.0 million (or approximately $39.7 million based on the exchange rate as of March 31, 2011). The earnout contingency expires in November 2020.

As of March 31, 2011, we were a party to interest rate cap and swap agreements which hedge variability in cash flows related to LIBOR, GBP LIBOR and EURIBOR based mortgage loans. Under these swaps, we pay variable-rate amounts in exchange for fixed-rate payments over the life of the agreements without exchange of the underlying principal amounts. See Item 3 “Quantitative and Qualitative Disclosures about Market Risk.”

Outstanding Consolidated Indebtedness

The table below summarizes our debt, as of March 31, 2011 (in millions):

Debt Summary:
Fixed rate	$	2,561.5
Variable rate debt subject to interest rate swaps and caps		284.2
Total fixed rate debt (including interest rate swaps and caps)		2,845.7
Variable rate—unhedged		209.7
Total	$	3,055.4
Percent of Total Debt:
Fixed rate (including swapped debt)		93.1	%
Variable rate		6.9	%
Total		100.0	%
Effective Interest Rate as of March 31, 2011(1) :
Fixed rate (including hedged variable rate debt)		5.61	%
Variable rate		1.42	%
Effective interest rate		5.32	%

(1) Excludes impact of deferred financing cost amortization.

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As of March 31, 2011, we had approximately $3.1 billion of outstanding consolidated long-term debt as set forth in the table above. Our ratio of debt to total enterprise value was approximately 33% (based on the closing price of our parent company’s common stock on March 31, 2011 of $58.14). For this purpose, our total enterprise value is defined as the sum of the market value of our parent company’s outstanding common stock (which may decrease, thereby increasing our debt to total enterprise value ratio), excluding options issued under our incentive award plan, plus the liquidation value of our parent company’s preferred stock, plus the aggregate value of our operating partnership units not held by our parent company (with the per unit value equal to the market value of one share of our parent company’s common stock and excluding long-term incentive units and Class C Units), plus the book value of our total consolidated indebtedness.

The variable rate debt shown above bears interest at interest rates based on various LIBOR, GBP LIBOR and EURIBOR rates ranging from one to twelve months, depending on the respective agreement governing the debt. Assuming maturity of the 2026 Debentures and the 2029 Debentures at their first redemption dates in August 2011 and April 2014, respectively, as of March 31, 2011, our debt had a weighted average term to initial maturity of approximately 5.0 years (approximately 5.2 years assuming exercise of extension options).

Off-Balance Sheet Arrangements

As of March 31, 2011, we were party to interest rate swap and cap agreements related to $284.2 million of outstanding principal on our variable rate debt. See Item 3 “Quantitative and Qualitative Disclosures about Market Risk.”

The 2026 Debentures provide for excess exchange value to be paid in cash and/or shares of Digital Realty Trust, Inc. common stock if the stock price exceeds a certain amount. If such debentures were exchanged in full on March 31, 2011, we would owe approximately $52.9 million to the holders of such debentures, payable in cash equal to the principal balance plus $45.0 million, equal to the excess exchange value, payable in cash and/or shares of Digital Realty Trust, Inc. common stock. See note 6 to our condensed consolidated financial statements for a further description of our 2026 Debentures.

Cash Flows

The following summary discussion of our cash flows is based on the consolidated statements of cash flows and is not meant to be an all-inclusive discussion of the changes in our cash flows for the periods presented below.

Comparison of Three Months Ended March 31, 2011 to Three Months Ended March 31, 2010

The following table shows cash flows and ending cash and cash equivalent balances for the three months ended March 31, 2011 and 2010, respectively (in thousands):

	Three Months Ended March 31,
	2011			2010			Change
Net cash provided by operating activities	$	64,489		$	57,200		$	7,289
Net cash used in investing activities		(137,557	)		(442,755	)		305,198
Net cash provided by financing activities		105,717			364,044			(258,327	)
Net increase (decrease) in cash and cash equivalents	$	32,649		$	(21,511	)	$	54,160

The increase in net cash provided by operating activities was due to increased cash flows from new leasing at our same store properties, completed and leased redevelopment space and our acquisition of new operating properties which was partially offset by increased operating and interest expenses. Net cash used in investing activities decreased for the three months ended March 31, 2011, as we had a decrease in cash paid for acquisitions for the three months ended March 31, 2011 ($0) as compared to in the same period in 2010 ($375.0 million) partially offset by an increase in cash paid for capital expenditures for the three months ended March 31, 2011 ($135.1 million) as compared to the same period in 2010 ($66.9 million).

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Cash flows from financing activities for the company consisted of the following amounts (in thousands):

	Three Months Ended March 31,
	2011			2010			Change
Proceeds from borrowings, net of repayments	$	(126,296	)	$	(91,802	)	$	(34,494	)
Net proceeds from issuance of common stock, including exercise of stock options		6,463			56,519			(50,056	)
Net proceeds from 2020 Notes		—			486,536			(486,536	)
Net proceeds from 2021 Notes		396,500			—			396,500
Principal payments on 2026 Debentures		(35,850	)		—			(35,850	)
Dividend and distribution payments		(123,984	)		(87,248	)		(36,736	)
Other		(11,116	)		39			(11,155	)
Net cash provided by financing activities	$	105,717		$	364,044		$	(258,327	)

The decrease in net cash provided by financing activities was primarily due to the issuance of our 2021 Notes (net proceeds of $396.5 million) during the three months ended March 31, 2011 as compared to the issuance of our 2020 Notes (net proceeds of $486.5 million) and common stock (net proceeds of $56.5 million) during the three months ended March 31, 2010. The increase in dividend and distribution payments for the three months ended March 31, 2011 as compared to the same period in 2010 was a result of an increase in shares outstanding and dividend amount per share in 2011 as compared to 2010.

Cash flows from financing activities for the operating partnership consisted of the following amounts (in thousands).

	Three Months Ended March 31,
	2011			2010			Change
Proceeds from borrowings, net of repayments	$	(126,296	)	$	(91,802	)	$	(34,494	)
General partner contributions, net		6,463			56,519			(50,056	)
Net proceeds from 2020 Notes		—			486,536			(486,536	)
Net proceeds from 2021 Notes		396,500			—			396,500
Principal payments on 2026 Debentures		(35,850	)		—			(35,850	)
Distribution payments		(123,984	)		(87,248	)		(36,736	)
Other		(11,116	)		39			(11,155	)
Net cash provided by financing activities	$	105,717		$	364,044		$	(258,327	)

The decrease in net cash provided by financing activities was primarily due to the issuance of the 2021 Notes (net proceeds of $396.5 million) during the three months ended March 31, 2011 as compared to the issuance of the 2020 Notes (net proceeds of $486.5 million) during the three months ended March 31, 2010. General partner contributions were primarily related to the issuance of our operating partnership’s units to the company in connection with the company’s common stock offerings related to the Equity Distribution Agreements. The increase in distribution payments for the three months ended March 31, 2011 as compared to the same period in 2010 was a result of an increase in units outstanding and distribution amount per unit in 2011 as compared to 2010.

Noncontrolling Interests in Operating Partnership

Noncontrolling interests relate to the common units in our operating partnership that are not owned by Digital Realty Trust, Inc., which, as of March 31, 2011, amounted to 5.6% of our operating partnership common units. In conjunction with our formation, GI Partners received common units, in exchange for contributing ownership interests in properties to our operating partnership. Also, our operating partnership issued common units to third party sellers in connection with our acquisition of real estate interests from such third parties.

Limited partners who acquired common units in connection with our formation have the right to require our 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 Digital Realty Trust, Inc. common stock at the time of the redemption. Alternatively, we may elect to acquire those common units in exchange for shares of Digital Realty Trust, Inc. common stock on a one-for-one basis, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions and similar events. Pursuant to registration rights agreements we entered into with GI Partners and the other third party contributors, we filed a shelf registration statement covering the issuance of the shares of our common stock issuable upon redemption of the common units, and the resale of those shares of common stock by the holders. As of March 31, 2007, GI Partners no longer had an ownership interest in our operating partnership.

Inflation

Many of our leases provide for separate real estate tax and operating expense escalations. In addition, many of the leases provide for fixed base rent increases. We believe that inflationary increases may be at least partially offset by the contractual rent increases and expense escalations described above. See “Factors Which May Influence Future Results of Operations—Operating Expenses” for further discussion.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Our future income, cash flows and fair values relevant to financial instruments depend upon prevalent market interest rates. Market risk refers to the risk of loss from adverse changes in market prices and interest rates. We do not use derivatives for trading or speculative purposes and only enter into contracts with major financial institutions based on their credit rating and other factors.

Analysis of Debt between Fixed and Variable Rate.

We use interest rate swap and cap agreements and fixed rate debt to reduce our exposure to interest rate movements. As of March 31, 2011, our consolidated debt was as follows (in millions):

	Carrying Value		Estimated Fair Value
Fixed rate debt	$	2,561.5	$	2,812.4
Variable rate debt subject to interest rate swaps and caps		284.2		285.1
Total fixed rate debt (including interest rate swaps and caps)		2,845.7		3,097.5
Variable rate debt		209.7		209.7
Total outstanding debt	$	3,055.4	$	3,307.2

Interest rate swaps included in this table and their fair values as of March 31, 2011 and December 31, 2010 were as follows (in thousands):

Notional Amount											Fair Value at Significant Other Observable Inputs (Level 2)
As of March 31, 2011			As of December 31, 2010		Type of Derivative	Strike Rate		Effective Date	Expiration Date		As of March 31, 2011			As of December 31, 2010
$	19,875	(1)	$	19,515 (1)	Swap		4.944	Jul. 10, 2006		Apr. 10, 2011	$	(23	)	$	(231	)
	68,640	(1)		66,858 (1)	Swap		2.980	April 6, 2009		Nov. 30, 2013		(1,810	)		(2,471	)
	14,727	(2)		13,978 (2)	Swap		3.981	May 17, 2006		Jul. 18, 2013		(561	)		(828	)
	10,655	(2)		10,113 (2)	Swap		4.070	Jun. 23, 2006		Jul. 18, 2013		(427	)		(621	)
	9,377	(2)		8,900 (2)	Swap		3.989	Jul. 27, 2006		Oct. 18, 2013		(378	)		(557	)
	43,652	(2)		41,430 (2)	Swap		3.776	Dec. 5, 2006		Jan. 18, 2012		(761	)		(1,129	)
	37,530	(2)		35,620 (2)	Swap		4.000	Dec. 20, 2006		Jan. 18, 2012		(722	)		(1,054	)
	42,474	(2)		40,152 (2)	Swap		2.703	Dec. 3, 2009		Sep. 4, 2014		(225	)		(1,139	)
	16,778			16,976	Cap		4.000	June 24, 2009		June 25, 2012		1			3
	20,500			20,500	Cap		4.000	Aug. 4, 2010		June 15, 2013		25			30
$	284,208		$	274,042							$	(4,881	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.60 to £1.00 as of March 31, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.42 to €1.00 as of March 31, 2011 and $1.34 to €1.00 as of December 31, 2010.

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Sensitivity to Changes in Interest Rates.

The following table shows the effect if assumed changes in interest rates occurred:

Assumed event	Interest rate change (basis points)			Change ($ millions)
Increase in fair value of interest rate swaps and caps following an assumed 10% increase in interest rates		24		$	1.1
Decrease in fair value of interest rate swaps and caps following an assumed 10% decrease in interest rates		(24	)		(1.1	)
Increase in annual interest expense on our debt that is variable rate and not subject to swapped or capped interest following a 10% increase in interest rates		24			0.5
Decrease in annual interest expense on our debt that is variable rate and not subject to swapped or capped interest following a 10% decrease in interest rates		(24	)		(0.5	)
Increase in fair value of fixed rate debt following a 10% decrease in interest rates		(24	)		28.6
Decrease in fair value of fixed rate debt following a 10% increase in interest rates		24			(26.6	)

Interest risk amounts were determined by considering the impact of hypothetical interest rates on our financial instruments. These analyses do not consider the effect of any change in overall economic activity that could occur in that environment. Further, in the event of a change of that magnitude, we may take actions to further mitigate our exposure to the change. However, due to the uncertainty of the specific actions that would be taken and their possible effects, these analyses assume no changes in our financial structure.

Foreign Currency Exchange Risk

For the three months ended March 31, 2011 and 2010, we had foreign operations in the United Kingdom, Ireland, France, The Netherlands, Switzerland, Singapore and Canada and, as such, are subject to risk from the effects of exchange rate movements of foreign currencies, which may affect future costs and cash flows. Our foreign operations are conducted in the British Pound, Euro, Swiss Franc and the Singapore Dollar, except for our Canadian property for which the functional currency is the U.S. dollar. Our primary currency exposures are to the Euro and the British Pound. We attempt to mitigate a portion of the risk of currency fluctuation by financing our properties in the local currency denominations, although there can be no assurance that this will be effective. As a result, changes in the relation of any such foreign currency to U.S. dollars may affect our revenues, operating margins and distributions and may also affect the book value of our assets and the amount of stockholders’ equity. For the three months ended March 31, 2011 and 2010, operating revenues from properties outside the United States contributed $25.7 million and $23.2 million, respectively, which represented 10.2% and 12.1% of our operating revenues, respectively.

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ITEM 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, Inc.)

The company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including its chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the company’s 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 its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the company has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the company does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the company carried out an evaluation, under the supervision and with participation of its chief executive officer and chief financial officer, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the company’s chief executive officer and chief financial officer each concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the company’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

Evaluation of Disclosure Controls and Procedures (Digital Realty Trust, L.P.)

The operating partnership maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to its management, including the chief executive officer and chief financial officer of its general partner, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the operating partnership’s 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 its management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Also, the operating partnership has investments in certain unconsolidated entities, which are accounted for using the equity method of accounting. As the operating partnership does not control or manage these entities, its disclosure controls and procedures with respect to such entities may be substantially more limited than those it maintains with respect to its consolidated subsidiaries.

As required by Rule 13a-15(b) or Rule 15d-15(b) of the Securities Exchange Act of 1934, as amended, management of the operating partnership carried out an evaluation, under the supervision and with participation of the chief executive officer and chief financial officer of its general partner, of the effectiveness of the design and operation of its disclosure controls and procedures that were in effect as of the end of the quarter covered by this report. Based on the foregoing, the chief executive officer and chief financial officer of the operating partnership’s general partner each concluded that its disclosure controls and procedures were effective at the reasonable assurance level.

There have been no changes in the operating partnership’s internal control over financial reporting during its most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

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PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

None.

ITEM 1A. RISK FACTORS.

The risk factors discussed under the heading “Risk Factors” and elsewhere in the company’s and the operating partnership’s Annual Report on Form 10-K for the year ended December  31, 2010, and any amendments thereto, continue to apply to our business.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

Digital Realty Trust, Inc.

During the three months ended March 31, 2011, Digital Realty Trust, Inc. issued 303,073 restricted shares of its common stock and paid approximately $47.6 million in cash to holders of our operating partnership’s 2026 Debentures in exchange for $35,850,000 in aggregate principal amount of our operating partnership’s 2026 Debentures at the request of holders pursuant to the terms of the indenture governing the 2026 Debentures.

The shares were issued in transactions exempt from registration pursuant to Section 4(2) of the Securities Act of 1933, as amended, and Rule 506 of Regulation D promulgated thereunder. The issuance of the shares did not involve a public offering and was made without general solicitation or advertising. Each holder represented that, among other things, it is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, as amended.

Digital Realty Trust, L.P.

During the three months ended March 31, 2011, Digital Realty Trust, Inc. contributed an aggregate of 303,073 restricted shares of its common stock to our operating partnership, and our operating partnership delivered the shares and approximately $47.6 million in cash in exchange for $35,850,000 in aggregate principal amount of its 2026 Debentures at the request of holders pursuant to the terms of the indenture governing the 2026 Debentures. Digital Realty Trust, Inc. contributed the shares to our operating partnership in exchange for an aggregate of 303,073 common units.

For the issuance of common units to Digital Realty Trust, Inc., our operating partnership relied on Digital Realty Trust, Inc.’s status as a publicly traded NYSE-listed company with over $5 billion in total consolidated assets and as our operating partnership’s majority owner and general partner as the basis for the exemption under Section 4(2) of the Securities Act.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.

None.

ITEM 4. (REMOVED AND RESERVED).

ITEM 5. OTHER INFORMATION.

None.

72

ITEM 6. EXHIBITS.

Exhibit Number	Description
1.1	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Citigroup Global Markets Inc.
1.2	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Merrill Lynch, Pierce, Fenner & Smith Incorporated.
1.3	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Credit Suisse Securities (USA) LLC.
1.4	Amendment No. 1 to Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Morgan Stanley & Co. Incorporated.
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Annual Report on Form 10-K filed on February 26, 2010).
3.2	Second Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 19, 2009).
3.3	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 (File No. 000-54023) filed on June 25, 2010).
3.4	Eighth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 10.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on April 13, 2009).
4.1	Indenture, dated as of March 8, 2011, among Digital Realty Trust, L.P., as issuer, Digital Realty Trust, Inc., as guarantor, and Deutsche Bank Trust Company Americas, as trustee (incorporated by reference to Exhibit 4.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 8, 2011).
4.2	Supplemental Indenture No. 1, dated as of March 8, 2011, among Digital Realty Trust, L.P., as issuer, Digital Realty Trust, Inc., as guarantor, and Deutsche Bank Trust Company Americas, as trustee, including the form of 5.250% Notes due 2021 and the guarantee (incorporated by reference to Exhibit 4.2 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 8, 2011).
10.1†	Employment Agreement, dated July 30, 2004, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and David J. Caron.
10.2†	First Amendment to Employment Agreement, dated December 4, 2008, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and David J. Caron.
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, Inc.

73

Exhibit Number	Description
31.2	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
101**	The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended March 31, 2011, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of March 31, 2011 and December 31, 2010; (ii) Condensed Consolidated Income Statements for the three months ended March 31, 2011 and 2010; (iii) Condensed Consolidated Statement of Equity/Statement of Capital for the three months ended March 31, 2011; (iv) Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2011 and 2010; (v) Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2011 and 2010; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

** 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, as amended, are deemed not filed for purposes of Section 18 of the Exchange Act of 1934, as amended, and otherwise are not subject to liability under these sections.

74

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DIGITAL REALTY TRUST, INC.
May 9, 2011	/S/    MICHAEL F. FOUST
	Michael F. Foust Chief Executive Officer (principal executive officer)
May 9, 2011	/S/    A. WILLIAM STEIN
	A. William Stein Chief Financial Officer and Chief Investment Officer (principal financial officer)
May 9, 2011	/S/    EDWARD F. SHAM
	Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	DIGITAL REALTY TRUST, L.P.
	By:	Digital Realty Trust, Inc. Its general partner
	By:
May 9, 2011	/S/    MICHAEL F. FOUST
	Michael F. Foust Chief Executive Officer (principal executive officer)
May 9, 2011	/S/    A. WILLIAM STEIN
	A. William Stein Chief Financial Officer and Chief Investment Officer (principal financial officer)
May 9, 2011	/S/    EDWARD F. SHAM
	Edward F. Sham Sr. Vice President and Controller (principal accounting officer)

75

Exhibit Index

Exhibit Number	Description
1.1	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Citigroup Global Markets Inc.
1.2	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Merrill Lynch, Pierce, Fenner & Smith Incorporated.
1.3	Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Credit Suisse Securities (USA) LLC.
1.4	Amendment No. 1 to Equity Distribution Agreement, dated March 2, 2011, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and Morgan Stanley & Co. Incorporated.
3.1	Articles of Amendment and Restatement of Digital Realty Trust, Inc., as amended (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Annual Report on Form 10-K filed on February 26, 2010).
3.2	Second Amended and Restated Bylaws of Digital Realty Trust, Inc. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 19, 2009).
3.3	Certificate of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 3.1 to Digital Realty Trust, L.P.’s General Form for Registration of Securities on Form 10 (File No. 000-54023) filed on June 25, 2010).
3.4	Eighth Amended and Restated Agreement of Limited Partnership of Digital Realty Trust, L.P. (incorporated by reference to Exhibit 10.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on April 13, 2009).
4.1	Indenture, dated as of March 8, 2011, among Digital Realty Trust, L.P., as issuer, Digital Realty Trust, Inc., as guarantor, and Deutsche Bank Trust Company Americas, as trustee (incorporated by reference to Exhibit 4.1 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 8, 2011).
4.2	Supplemental Indenture No. 1, dated as of March 8, 2011, among Digital Realty Trust, L.P., as issuer, Digital Realty Trust, Inc., as guarantor, and Deutsche Bank Trust Company Americas, as trustee, including the form of 5.250% Notes due 2021 and the guarantee (incorporated by reference to Exhibit 4.2 to Digital Realty Trust, Inc.’s Current Report on Form 8-K filed on March 8, 2011).
10.1†	Employment Agreement, dated July 30, 2004, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and David J. Caron.
10.2†	First Amendment to Employment Agreement, dated December 4, 2008, among Digital Realty Trust, Inc., Digital Realty Trust, L.P. and David J. Caron.
12.1	Statement of Computation of Ratios.
31.1	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, Inc.

76

Exhibit Number	Description
31.2	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
31.3	Rule 13a-14(a)/15d-14(a) Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
31.4	Rule 13a-14(a)/15d-14(a) Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
32.1	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, Inc.
32.2	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, Inc.
32.3	18 U.S.C. § 1350 Certifications of Chief Executive Officer for Digital Realty Trust, L.P.
32.4	18 U.S.C. § 1350 Certifications of Chief Financial Officer for Digital Realty Trust, L.P.
101**	The following financial statements from Digital Realty Trust, Inc.’s and Digital Realty Trust, L.P.’s Form 10-Q for the quarter ended March 31, 2011, formatted in XBRL interactive data files: (i) Condensed Consolidated Balance Sheets as of March 31, 2011 and December 31, 2010; (ii) Condensed Consolidated Income Statements for the three months ended March 31, 2011 and 2010; (iii) Condensed Consolidated Statement of Equity/Statement of Capital for the three months ended March 31, 2011; (iv) Condensed Consolidated Statements of Comprehensive Income for the three months ended March 31, 2011 and 2010; (v) Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2011 and 2010; and (vi) Notes to Condensed Consolidated Financial Statements.

† Management contract or compensatory plan or arrangement.

** 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, as amended, are deemed not filed for purposes of Section 18 of the Exchange Act of 1934, as amended, and otherwise are not subject to liability under these sections.

77

EX-1.1

Exhibit 1.1

Amendment No. 1

to

Amended and Restated Equity Distribution Agreement

This Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated as of March 2, 2011 (this “Amendment”), by and among Digital Realty Trust, Inc., a Maryland corporation (the “Company”), Digital Realty Trust, L.P., a Maryland limited partnership (the “Operating Partnership” and, together with the Company, the “Transaction Entities”), and Citigroup Global Markets Inc. (the “Manager”). Reference is hereby made to that certain Amended and Restated Equity Distribution Agreement, dated as of January 22, 2010 (the “Agreement”), by and among the Transaction Entities and the Manager. Capitalized terms used herein without definition shall have the same meanings as set forth in the Agreement, as amended hereby.

RECITALS

WHEREAS, the Transaction Entities have requested, and the Manager has agreed, to amend the Agreement to amend certain representations in Section 2 of the Agreement.

NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows:

1. Amendment to Agreement.

(a) Section 2 of the Agreement is hereby amended by deleting paragraph (m) thereof in its entirety and substituting the following therefor:

Each subsidiary of the Company has been duly formed and is validly existing as a corporation, limited liability company or limited partnership, as the case may be, in good standing under the laws of the jurisdiction in which it is chartered or organized with full power and authority (corporate and other) to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Prospectus, except as would not reasonably be expected to have a Material Adverse Effect, and is duly qualified to do business as a foreign corporation, limited liability company or limited partnership, as the case may be, and is in good standing under the laws of each jurisdiction which requires such qualification, except where the failure to be so qualified would not reasonably be expected to have a Material Adverse Effect. Schedule II contains a complete list of all subsidiaries of the Operating Partnership that constitute “significant subsidiaries” within the meaning of Rule 1-02(w) of Regulation S-X as of December 31, 2010.

(b) Section 2 of the Agreement is hereby amended by deleting paragraph (n) thereof in its entirety and substituting the following therefor:

All the outstanding shares of capital stock or other ownership interests of each subsidiary (other than the Operating Partnership) have been duly and validly authorized and issued and are fully paid and nonassessable, except as would not reasonably be expected to have a Material Adverse Effect, and, except as otherwise set forth in the Disclosure Package and the Prospectus, all outstanding shares of capital stock or other ownership interests of the subsidiaries will be

owned by the Company or the Operating Partnership either directly or through wholly owned subsidiaries free and clear of any perfected security interest or any other security interests, claims, mortgages, pledges, liens, encumbrances or other restrictions of any kind (collectively, “Liens”), except for Liens securing indebtedness as described in the Disclosure Package and the Prospectus or except where such Liens would not individually or in the aggregate reasonably be expected to have a Material Adverse Effect with the Company’s ability to exercise control over each of such subsidiaries. Except as set forth in the Disclosure Package and the Prospectus, or as would not reasonably be expected to have a Material Adverse Effect, there are no outstanding options, warrants or other rights to purchase, agreements or other obligations to issue, or rights to convert any obligations into or exchange any securities or interests for capital stock or other ownership interests of any subsidiary.

(c) Section 2 of the Agreement is hereby amended by deleting paragraph (q) thereof in its entirety and substituting the following therefor:

There is no franchise, contract or other document of a character required to be described or incorporated by reference in the Disclosure Package, the Registration Statement or the Prospectus, or to be filed as an exhibit thereto, which is not described or filed as required; and the statements included or incorporated by reference in the Base Prospectus under the headings “Description of the Partnership Agreement of Digital Realty Trust, L.P.,” “General Description of Securities,” “Description of Common Stock,” “Description of Preferred Stock,” “Description of Depositary Shares,” “Description of Warrants,” “Description of Debt Securities and Related Guarantees,” “Material Provisions of Maryland Law and of the Charter and Bylaws of Digital Realty Trust, Inc.,” “Plan of Distribution”, “Restrictions on Ownership and Transfer,” and “United States Federal Income Tax Considerations,” insofar as such statements summarize legal matters, agreements, documents or proceedings discussed therein, are accurate and fair summaries of such legal matters, agreements, documents or proceedings. The Shares conform in all material respects to the respective statements relating thereto contained in the Disclosure Package, the Registration Statement and the Disclosure Package.

(d) Section 2 of the Agreement is hereby amended by deleting paragraph (u) thereof in its entirety and substituting the following therefor:

Neither the execution and delivery of this Agreement, the issuance and sale of the Shares nor the consummation of any other of the transactions herein contemplated, nor the fulfillment of the terms hereof by the Company or the Operating Partnership will conflict with, result in a breach or violation of, or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (i) the charter or bylaws of the Company or the organizational or other governing documents of any of its Specified Subsidiaries, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any of its subsidiaries of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or

2

their properties, except, in the case of clauses (ii), (iii) or (iv) above, for such conflicts, breaches, violations, liens, charges or encumbrances that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(e) Section 2 of the Agreement is hereby amended by deleting paragraph (aa) thereof in its entirety and substituting the following therefor:

None of the Company, the Operating Partnership nor any subsidiary is in violation or default of (i) any provision of the charter, bylaws or other organizational or governing documents of the Company, the Operating Partnership or any Specified Subsidiary, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which it is a party or bound or to which its property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, in the case of clauses (ii), (iii) or (iv) above, for such violations or defaults that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(f) Each reference to “Subsidiary” in Section 2(cc) is hereby amended and replaced with a reference to “subsidiary.”

(g) Section 2 of the Agreement is hereby amended by deleting paragraph (ee) thereof in its entirety and substituting the following therefor:

The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the businesses in which they are engaged except as would not reasonably be expected to have a Material Adverse Effect; all policies of insurance and fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect except as would not reasonably be expected to have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments except as would not reasonably be expected to have a Material Adverse Effect; and except as would not reasonably be expected to have a Material Adverse Effect, there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any such subsidiary has been refused any insurance coverage sought or applied for; and neither the Company nor any such subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably be expected to have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto).

(h) Section 2 of the Agreement is hereby amended by deleting paragraph (ff) thereof in its entirety and substituting the following therefor:

3

No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends or distributions to the Company, from making any other distribution on such subsidiary’s capital stock or equity interests, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except pursuant to the terms of any indebtedness set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto) or as would not reasonably be expected to have a Material Adverse Effect.

(i) Section 20 of the Agreement is hereby amended by adding the following definition in alphabetical order:

“Specified Subsidiary” shall mean each of the direct and indirect subsidiaries of the Company listed on Schedule VI hereto.

2. Specified Subsidiaries. Exhibit A attached hereto shall constitute a new Schedule IV to the Agreement.

3. Subsidiaries. Schedule II to the Agreement is hereby deleted in its entirety and is hereby replaced with Exhibit B attached hereto.

4. Miscellaneous. Except as set forth in this Amendment, the Agreement shall remain in full force and effect. Each and every reference to “the Agreement” or “this Agreement” in the Agreement shall mean and refer to the Agreement as amended by this Amendment.

5. Applicable Law. This Amendment will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

6. Counterparts. This Amendment may be signed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement.

7. Headings. The section headings used in this Amendment are for convenience only and shall not affect the construction hereof.

4

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above.

DIGITAL REALTY TRUST, INC.
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
DIGITAL REALTY TRUST, L.P.
By: Digital Realty Trust, Inc., its general partner
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
CITIGROUP GLOBAL MARKETS INC.
By:	/s/ Andrew Power
	Name:	Andrew Power
	Title:	Vice President

Exhibit A

SCHEDULE IV

Specified Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Printers Square, LLC	Delaware	Illinois
200 Paul, LLC	Delaware	California
Digital Ashburn CS, LLC	Delaware	Virginia
Digital Network Services, LLC	Delaware	Arizona
Digital Lakeside, LLC	Delaware	Illinois
GIP 7th Street, LLC	Delaware	California
Digital 128 First Avenue, LLC	Delaware	Massachusetts

Exhibit B

SCHEDULE II

Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Lakeside, LLC	Delaware	Illinois
Digital 128 First Avenue, LLC	Delaware	Massachusetts

EX-1.2

Exhibit 1.2

Amendment No. 1

to

Amended and Restated Equity Distribution Agreement

This Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated as of March 2, 2011 (this “Amendment”), by and among Digital Realty Trust, Inc., a Maryland corporation (the “Company”), Digital Realty Trust, L.P., a Maryland limited partnership (the “Operating Partnership” and, together with the Company, the “Transaction Entities”), and Merrill Lynch, Pierce, Fenner & Smith Incorporated (the “Manager”). Reference is hereby made to that certain Amended and Restated Equity Distribution Agreement, dated as of January 22, 2010 (the “Agreement”), by and among the Transaction Entities and the Manager. Capitalized terms used herein without definition shall have the same meanings as set forth in the Agreement, as amended hereby.

RECITALS

WHEREAS, the Transaction Entities have requested, and the Manager has agreed, to amend the Agreement to amend certain representations in Section 2 of the Agreement.

NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows:

1. Amendment to Agreement.

(a) Section 2 of the Agreement is hereby amended by deleting paragraph (m) thereof in its entirety and substituting the following therefor:

Each subsidiary of the Company has been duly formed and is validly existing as a corporation, limited liability company or limited partnership, as the case may be, in good standing under the laws of the jurisdiction in which it is chartered or organized with full power and authority (corporate and other) to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Prospectus, except as would not reasonably be expected to have a Material Adverse Effect, and is duly qualified to do business as a foreign corporation, limited liability company or limited partnership, as the case may be, and is in good standing under the laws of each jurisdiction which requires such qualification, except where the failure to be so qualified would not reasonably be expected to have a Material Adverse Effect. Schedule II contains a complete list of all subsidiaries of the Operating Partnership that constitute “significant subsidiaries” within the meaning of Rule 1-02(w) of Regulation S-X as of December 31, 2010.

(b) Section 2 of the Agreement is hereby amended by deleting paragraph (n) thereof in its entirety and substituting the following therefor:

All the outstanding shares of capital stock or other ownership interests of each subsidiary (other than the Operating Partnership) have been duly and validly authorized and issued and are fully paid and nonassessable, except as would not reasonably be expected to have a Material Adverse Effect, and, except as otherwise set forth in the Disclosure Package and the Prospectus, all outstanding shares of capital stock or other ownership interests of the subsidiaries will be

owned by the Company or the Operating Partnership either directly or through wholly owned subsidiaries free and clear of any perfected security interest or any other security interests, claims, mortgages, pledges, liens, encumbrances or other restrictions of any kind (collectively, “Liens”), except for Liens securing indebtedness as described in the Disclosure Package and the Prospectus or except where such Liens would not individually or in the aggregate reasonably be expected to have a Material Adverse Effect with the Company’s ability to exercise control over each of such subsidiaries. Except as set forth in the Disclosure Package and the Prospectus, or as would not reasonably be expected to have a Material Adverse Effect, there are no outstanding options, warrants or other rights to purchase, agreements or other obligations to issue, or rights to convert any obligations into or exchange any securities or interests for capital stock or other ownership interests of any subsidiary.

(c) Section 2 of the Agreement is hereby amended by deleting paragraph (q) thereof in its entirety and substituting the following therefor:

There is no franchise, contract or other document of a character required to be described or incorporated by reference in the Disclosure Package, the Registration Statement or the Prospectus, or to be filed as an exhibit thereto, which is not described or filed as required; and the statements included or incorporated by reference in the Base Prospectus under the headings “Description of the Partnership Agreement of Digital Realty Trust, L.P.,” “General Description of Securities,” “Description of Common Stock,” “Description of Preferred Stock,” “Description of Depositary Shares,” “Description of Warrants,” “Description of Debt Securities and Related Guarantees,” “Material Provisions of Maryland Law and of the Charter and Bylaws of Digital Realty Trust, Inc.,” “Plan of Distribution”, “Restrictions on Ownership and Transfer,” and “United States Federal Income Tax Considerations,” insofar as such statements summarize legal matters, agreements, documents or proceedings discussed therein, are accurate and fair summaries of such legal matters, agreements, documents or proceedings. The Shares conform in all material respects to the respective statements relating thereto contained in the Disclosure Package, the Registration Statement and the Disclosure Package.

(d) Section 2 of the Agreement is hereby amended by deleting paragraph (u) thereof in its entirety and substituting the following therefor:

Neither the execution and delivery of this Agreement, the issuance and sale of the Shares nor the consummation of any other of the transactions herein contemplated, nor the fulfillment of the terms hereof by the Company or the Operating Partnership will conflict with, result in a breach or violation of, or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (i) the charter or bylaws of the Company or the organizational or other governing documents of any of its Specified Subsidiaries, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any of its subsidiaries of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or

2

their properties, except, in the case of clauses (ii), (iii) or (iv) above, for such conflicts, breaches, violations, liens, charges or encumbrances that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(e) Section 2 of the Agreement is hereby amended by deleting paragraph (aa) thereof in its entirety and substituting the following therefor:

None of the Company, the Operating Partnership nor any subsidiary is in violation or default of (i) any provision of the charter, bylaws or other organizational or governing documents of the Company, the Operating Partnership or any Specified Subsidiary, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which it is a party or bound or to which its property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, in the case of clauses (ii), (iii) or (iv) above, for such violations or defaults that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(f) Each reference to “Subsidiary” in Section 2(cc) is hereby amended and replaced with a reference to “subsidiary.”

(g) Section 2 of the Agreement is hereby amended by deleting paragraph (ee) thereof in its entirety and substituting the following therefor:

The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the businesses in which they are engaged except as would not reasonably be expected to have a Material Adverse Effect; all policies of insurance and fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect except as would not reasonably be expected to have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments except as would not reasonably be expected to have a Material Adverse Effect; and except as would not reasonably be expected to have a Material Adverse Effect, there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any such subsidiary has been refused any insurance coverage sought or applied for; and neither the Company nor any such subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably be expected to have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto).

(h) Section 2 of the Agreement is hereby amended by deleting paragraph (ff) thereof in its entirety and substituting the following therefor:

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No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends or distributions to the Company, from making any other distribution on such subsidiary’s capital stock or equity interests, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except pursuant to the terms of any indebtedness set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto) or as would not reasonably be expected to have a Material Adverse Effect.

(i) Section 20 of the Agreement is hereby amended by adding the following definition in alphabetical order:

“Specified Subsidiary” shall mean each of the direct and indirect subsidiaries of the Company listed on Schedule VI hereto.

2. Specified Subsidiaries. Exhibit A attached hereto shall constitute a new Schedule IV to the Agreement.

3. Subsidiaries. Schedule II to the Agreement is hereby deleted in its entirety and is hereby replaced with Exhibit B attached hereto.

4. Miscellaneous. Except as set forth in this Amendment, the Agreement shall remain in full force and effect. Each and every reference to “the Agreement” or “this Agreement” in the Agreement shall mean and refer to the Agreement as amended by this Amendment.

5. Applicable Law. This Amendment will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

6. Counterparts. This Amendment may be signed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement.

7. Headings. The section headings used in this Amendment are for convenience only and shall not affect the construction hereof.

4

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above.

DIGITAL REALTY TRUST, INC.
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
DIGITAL REALTY TRUST, L.P.
By: Digital Realty Trust, Inc., its general partner
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
By:	/s/ Greg Wright
	Name:	Greg Wright
	Title:	Managing Director

Exhibit A

SCHEDULE IV

Specified Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Printers Square, LLC	Delaware	Illinois
200 Paul, LLC	Delaware	California
Digital Ashburn CS, LLC	Delaware	Virginia
Digital Network Services, LLC	Delaware	Arizona
Digital Lakeside, LLC	Delaware	Illinois
GIP 7th Street, LLC	Delaware	California
Digital 128 First Avenue, LLC	Delaware	Massachusetts

Exhibit B

SCHEDULE II

Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Lakeside, LLC	Delaware	Illinois
Digital 128 First Avenue, LLC	Delaware	Massachusetts

EX-1.3

Exhibit 1.3

Amendment No. 1

to

Amended and Restated Equity Distribution Agreement

This Amendment No. 1 to Amended and Restated Equity Distribution Agreement, dated as of March 2, 2011 (this “Amendment”), by and among Digital Realty Trust, Inc., a Maryland corporation (the “Company”), Digital Realty Trust, L.P., a Maryland limited partnership (the “Operating Partnership” and, together with the Company, the “Transaction Entities”), and Credit Suisse Securities (USA) LLC (the “Manager”). Reference is hereby made to that certain Amended and Restated Equity Distribution Agreement, dated as of January 22, 2010 (the “Agreement”), by and among the Transaction Entities and the Manager. Capitalized terms used herein without definition shall have the same meanings as set forth in the Agreement, as amended hereby.

RECITALS

WHEREAS, the Transaction Entities have requested, and the Manager has agreed, to amend the Agreement to amend certain representations in Section 2 of the Agreement.

NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows:

1. Amendment to Agreement.

(a) Section 2 of the Agreement is hereby amended by deleting paragraph (m) thereof in its entirety and substituting the following therefor:

Each subsidiary of the Company has been duly formed and is validly existing as a corporation, limited liability company or limited partnership, as the case may be, in good standing under the laws of the jurisdiction in which it is chartered or organized with full power and authority (corporate and other) to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Prospectus, except as would not reasonably be expected to have a Material Adverse Effect, and is duly qualified to do business as a foreign corporation, limited liability company or limited partnership, as the case may be, and is in good standing under the laws of each jurisdiction which requires such qualification, except where the failure to be so qualified would not reasonably be expected to have a Material Adverse Effect. Schedule II contains a complete list of all subsidiaries of the Operating Partnership that constitute “significant subsidiaries” within the meaning of Rule 1-02(w) of Regulation S-X as of December 31, 2010.

(b) Section 2 of the Agreement is hereby amended by deleting paragraph (n) thereof in its entirety and substituting the following therefor:

All the outstanding shares of capital stock or other ownership interests of each subsidiary (other than the Operating Partnership) have been duly and validly authorized and issued and are fully paid and nonassessable, except as would not reasonably be expected to have a Material Adverse Effect, and, except as otherwise set forth in the Disclosure Package and the Prospectus, all outstanding shares of capital stock or other ownership interests of the subsidiaries will be

owned by the Company or the Operating Partnership either directly or through wholly owned subsidiaries free and clear of any perfected security interest or any other security interests, claims, mortgages, pledges, liens, encumbrances or other restrictions of any kind (collectively, “Liens”), except for Liens securing indebtedness as described in the Disclosure Package and the Prospectus or except where such Liens would not individually or in the aggregate reasonably be expected to have a Material Adverse Effect with the Company’s ability to exercise control over each of such subsidiaries. Except as set forth in the Disclosure Package and the Prospectus, or as would not reasonably be expected to have a Material Adverse Effect, there are no outstanding options, warrants or other rights to purchase, agreements or other obligations to issue, or rights to convert any obligations into or exchange any securities or interests for capital stock or other ownership interests of any subsidiary.

(c) Section 2 of the Agreement is hereby amended by deleting paragraph (q) thereof in its entirety and substituting the following therefor:

There is no franchise, contract or other document of a character required to be described or incorporated by reference in the Disclosure Package, the Registration Statement or the Prospectus, or to be filed as an exhibit thereto, which is not described or filed as required; and the statements included or incorporated by reference in the Base Prospectus under the headings “Description of the Partnership Agreement of Digital Realty Trust, L.P.,” “General Description of Securities,” “Description of Common Stock,” “Description of Preferred Stock,” “Description of Depositary Shares,” “Description of Warrants,” “Description of Debt Securities and Related Guarantees,” “Material Provisions of Maryland Law and of the Charter and Bylaws of Digital Realty Trust, Inc.,” “Plan of Distribution”, “Restrictions on Ownership and Transfer,” and “United States Federal Income Tax Considerations,” insofar as such statements summarize legal matters, agreements, documents or proceedings discussed therein, are accurate and fair summaries of such legal matters, agreements, documents or proceedings. The Shares conform in all material respects to the respective statements relating thereto contained in the Disclosure Package, the Registration Statement and the Disclosure Package.

(d) Section 2 of the Agreement is hereby amended by deleting paragraph (u) thereof in its entirety and substituting the following therefor:

Neither the execution and delivery of this Agreement, the issuance and sale of the Shares nor the consummation of any other of the transactions herein contemplated, nor the fulfillment of the terms hereof by the Company or the Operating Partnership will conflict with, result in a breach or violation of, or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (i) the charter or bylaws of the Company or the organizational or other governing documents of any of its Specified Subsidiaries, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any of its subsidiaries of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or

2

their properties, except, in the case of clauses (ii), (iii) or (iv) above, for such conflicts, breaches, violations, liens, charges or encumbrances that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(e) Section 2 of the Agreement is hereby amended by deleting paragraph (aa) thereof in its entirety and substituting the following therefor:

None of the Company, the Operating Partnership nor any subsidiary is in violation or default of (i) any provision of the charter, bylaws or other organizational or governing documents of the Company, the Operating Partnership or any Specified Subsidiary, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which it is a party or bound or to which its property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, in the case of clauses (ii), (iii) or (iv) above, for such violations or defaults that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(f) Each reference to “Subsidiary” in Section 2(cc) is hereby amended and replaced with a reference to “subsidiary.”

(g) Section 2 of the Agreement is hereby amended by deleting paragraph (ee) thereof in its entirety and substituting the following therefor:

The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the businesses in which they are engaged except as would not reasonably be expected to have a Material Adverse Effect; all policies of insurance and fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect except as would not reasonably be expected to have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments except as would not reasonably be expected to have a Material Adverse Effect; and except as would not reasonably be expected to have a Material Adverse Effect, there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any such subsidiary has been refused any insurance coverage sought or applied for; and neither the Company nor any such subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably be expected to have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto).

(h) Section 2 of the Agreement is hereby amended by deleting paragraph (ff) thereof in its entirety and substituting the following therefor:

3

No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends or distributions to the Company, from making any other distribution on such subsidiary’s capital stock or equity interests, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except pursuant to the terms of any indebtedness set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto) or as would not reasonably be expected to have a Material Adverse Effect.

(i) Section 20 of the Agreement is hereby amended by adding the following definition in alphabetical order:

“Specified Subsidiary” shall mean each of the direct and indirect subsidiaries of the Company listed on Schedule VI hereto.

2. Specified Subsidiaries. Exhibit A attached hereto shall constitute a new Schedule IV to the Agreement.

3. Subsidiaries. Schedule II to the Agreement is hereby deleted in its entirety and is hereby replaced with Exhibit B attached hereto.

4. Miscellaneous. Except as set forth in this Amendment, the Agreement shall remain in full force and effect. Each and every reference to “the Agreement” or “this Agreement” in the Agreement shall mean and refer to the Agreement as amended by this Amendment.

5. Applicable Law. This Amendment will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

6. Counterparts. This Amendment may be signed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement.

7. Headings. The section headings used in this Amendment are for convenience only and shall not affect the construction hereof.

4

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above.

DIGITAL REALTY TRUST, INC.
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
DIGITAL REALTY TRUST, L.P.
By: Digital Realty Trust, Inc., its general partner
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
CREDIT SUISSE SECURITIES (USA) LLC
By:	/s/ Jason P. Marino
	Name:	Jason P. Marino
	Title:	Director

Exhibit A

SCHEDULE IV

Specified Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Printers Square, LLC	Delaware	Illinois
200 Paul, LLC	Delaware	California
Digital Ashburn CS, LLC	Delaware	Virginia
Digital Network Services, LLC	Delaware	Arizona
Digital Lakeside, LLC	Delaware	Illinois
GIP 7th Street, LLC	Delaware	California
Digital 128 First Avenue, LLC	Delaware	Massachusetts

Exhibit B

SCHEDULE II

Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Lakeside, LLC	Delaware	Illinois
Digital 128 First Avenue, LLC	Delaware	Massachusetts

EX-1.4

Exhibit 1.4

Amendment No. 1

to

Equity Distribution Agreement

This Amendment No. 1 to Equity Distribution Agreement, dated as of March 2, 2011 (this “Amendment”), by and among Digital Realty Trust, Inc., a Maryland corporation (the “Company”), Digital Realty Trust, L.P., a Maryland limited partnership (the “Operating Partnership” and, together with the Company, the “Transaction Entities”), and Morgan Stanley & Co. Incorporated (the “Manager”). Reference is hereby made to that certain Equity Distribution Agreement, dated as of January 22, 2010 (the “Agreement”), by and among the Transaction Entities and the Manager. Capitalized terms used herein without definition shall have the same meanings as set forth in the Agreement, as amended hereby.

RECITALS

WHEREAS, the Transaction Entities have requested, and the Manager has agreed, to amend the Agreement to amend certain representations in Section 2 of the Agreement.

NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows:

1. Amendment to Agreement

(a) Section 2 of the Agreement is hereby amended by deleting paragraph (m) thereof in its entirety and substituting the following therefor:

Each subsidiary of the Company has been duly formed and is validly existing as a corporation, limited liability company or limited partnership, as the case may be, in good standing under the laws of the jurisdiction in which it is chartered or organized with full power and authority (corporate and other) to own or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Prospectus, except as would not reasonably be expected to have a Material Adverse Effect, and is duly qualified to do business as a foreign corporation, limited liability company or limited partnership, as the case may be, and is in good standing under the laws of each jurisdiction which requires such qualification, except where the failure to be so qualified would not reasonably be expected to have a Material Adverse Effect. Schedule II contains a complete list of all subsidiaries of the Operating Partnership that constitute “significant subsidiaries” within the meaning of Rule 1-02(w) of Regulation S-X as of December 31, 2010.

(b) Section 2 of the Agreement is hereby amended by deleting paragraph (n) thereof in its entirety and substituting the following therefor:

All the outstanding shares of capital stock or other ownership interests of each subsidiary (other than the Operating Partnership) have been duly and validly authorized and issued and are fully paid and nonassessable, except as would not reasonably be expected to have a Material Adverse Effect, and, except as otherwise set forth in the Disclosure Package and the Prospectus, all outstanding shares of capital stock or other ownership interests of the subsidiaries will be owned by the Company or the Operating Partnership either directly or through wholly owned

subsidiaries free and clear of any perfected security interest or any other security interests, claims, mortgages, pledges, liens, encumbrances or other restrictions of any kind (collectively, “Liens”), except for Liens securing indebtedness as described in the Disclosure Package and the Prospectus or except where such Liens would not individually or in the aggregate reasonably be expected to have a Material Adverse Effect with the Company’s ability to exercise control over each of such subsidiaries. Except as set forth in the Disclosure Package and the Prospectus, or as would not reasonably be expected to have a Material Adverse Effect, there are no outstanding options, warrants or other rights to purchase, agreements or other obligations to issue, or rights to convert any obligations into or exchange any securities or interests for capital stock or other ownership interests of any subsidiary.

(c) Section 2 of the Agreement is hereby amended by deleting paragraph (q) thereof in its entirety and substituting the following therefor:

There is no franchise, contract or other document of a character required to be described or incorporated by reference in the Disclosure Package, the Registration Statement or the Prospectus, or to be filed as an exhibit thereto, which is not described or filed as required; and the statements included or incorporated by reference in the Base Prospectus under the headings “Description of the Partnership Agreement of Digital Realty Trust, L.P.,” “General Description of Securities,” “Description of Common Stock,” “Description of Preferred Stock,” “Description of Depositary Shares,” “Description of Warrants,” “Description of Debt Securities and Related Guarantees,” “Material Provisions of Maryland Law and of the Charter and Bylaws of Digital Realty Trust, Inc.,” “Plan of Distribution”, “Restrictions on Ownership and Transfer,” and “United States Federal Income Tax Considerations,” insofar as such statements summarize legal matters, agreements, documents or proceedings discussed therein, are accurate and fair summaries of such legal matters, agreements, documents or proceedings. The Shares conform in all material respects to the respective statements relating thereto contained in the Disclosure Package, the Registration Statement and the Disclosure Package.

(d) Section 2 of the Agreement is hereby amended by deleting paragraph (u) thereof in its entirety and substituting the following therefor:

Neither the execution and delivery of this Agreement, the issuance and sale of the Shares nor the consummation of any other of the transactions herein contemplated, nor the fulfillment of the terms hereof by the Company or the Operating Partnership will conflict with, result in a breach or violation of, or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (i) the charter or bylaws of the Company or the organizational or other governing documents of any of its Specified Subsidiaries, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any of its subsidiaries of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or their properties, except, in the case of clauses (ii), (iii) or (iv) above, for such conflicts, breaches, violations, liens, charges or encumbrances that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

2

(e) Section 2 of the Agreement is hereby amended by deleting paragraph (aa) thereof in its entirety and substituting the following therefor:

None of the Company, the Operating Partnership nor any subsidiary is in violation or default of (i) any provision of the charter, bylaws or other organizational or governing documents of the Company, the Operating Partnership or any Specified Subsidiary, (ii) any provision of the charter, bylaws or other organizational or governing documents of any subsidiary (other than the Specified Subsidiaries), (iii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, condition, covenant or instrument to which it is a party or bound or to which its property is subject, or (iv) any statute, law, rule, regulation, judgment, order or decree of any court, regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, in the case of clauses (ii), (iii) or (iv) above, for such violations or defaults that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect.

(f) Each reference to “Subsidiary” in Section 2(cc) is hereby amended and replaced with a reference to “subsidiary.”

(g) Section 2 of the Agreement is hereby amended by deleting paragraph (ee) thereof in its entirety and substituting the following therefor:

The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the businesses in which they are engaged except as would not reasonably be expected to have a Material Adverse Effect; all policies of insurance and fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses, assets, employees, officers and directors are in full force and effect except as would not reasonably be expected to have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments except as would not reasonably be expected to have a Material Adverse Effect; and except as would not reasonably be expected to have a Material Adverse Effect, there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any such subsidiary has been refused any insurance coverage sought or applied for; and neither the Company nor any such subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not reasonably be expected to have a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto).

(h) Section 2 of the Agreement is hereby amended by deleting paragraph (ff) thereof in its entirety and substituting the following therefor:

3

No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends or distributions to the Company, from making any other distribution on such subsidiary’s capital stock or equity interests, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except pursuant to the terms of any indebtedness set forth in or contemplated in the Disclosure Package and the Prospectus (exclusive of any supplement thereto) or as would not reasonably be expected to have a Material Adverse Effect.

(i) Section 20 of the Agreement is hereby amended by adding the following definition in alphabetical order:

“Specified Subsidiary” shall mean each of the direct and indirect subsidiaries of the Company listed on Schedule VI hereto.

2. Specified Subsidiaries. Exhibit A attached hereto shall constitute a new Schedule IV to the Agreement.

3. Subsidiaries. Schedule II to the Agreement is hereby deleted in its entirety and is hereby replaced with Exhibit B attached hereto.

4. Miscellaneous. Except as set forth in this Amendment, the Agreement shall remain in full force and effect. Each and every reference to “the Agreement” or “this Agreement” in the Agreement shall mean and refer to the Agreement as amended by this Amendment.

5. Applicable Law. This Amendment will be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York.

6. Counterparts. This Amendment may be signed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement.

7. Headings. The section headings used in this Amendment are for convenience only and shall not affect the construction hereof.

4

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above.

DIGITAL REALTY TRUST, INC.
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
DIGITAL REALTY TRUST, L.P.
By: Digital Realty Trust, Inc., its general partner
By:	/s/ A. William Stein
	Name:	A. William Stein
	Title:	Chief Financial Officer and
		Chief Investment Officer
MORGAN STANLEY & CO. INCORPORATED
By:	/s/ Tom Boyle
	Name:	Tom Boyle
	Title:	VP

Exhibit A

SCHEDULE IV

Specified Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Printers Square, LLC	Delaware	Illinois
200 Paul, LLC	Delaware	California
Digital Ashburn CS, LLC	Delaware	Virginia
Digital Network Services, LLC	Delaware	Arizona
Digital Lakeside, LLC	Delaware	Illinois
GIP 7th Street, LLC	Delaware	California
Digital 128 First Avenue, LLC	Delaware	Massachusetts

Exhibit B

SCHEDULE II

Subsidiaries

Name	Jurisdiction of Formation/Incorporation	Foreign Qualifications
Digital Lakeside, LLC	Delaware	Illinois
Digital 128 First Avenue, LLC	Delaware	Massachusetts

EX-10.1

Exhibit 10.1

DIGITAL REALTY TRUST, INC.

2730 SAND HILL ROAD, SUITE 280

MENLO PARK, CALIFORNIA 94025

July 30, 2004

Dave Caron

c/o Digital Realty Trust, Inc.

2730 Sand Hill Road, Suite 280

Menlo Park, California 94025

Re:    EMPLOYMENT TERMS

Dear Dave:

Digital Realty Trust, Inc. (the “REIT”) and Digital Realty, L.P. (the “Operating Partnership” and together with the REIT, the “Company”) are pleased to offer you the position of Vice President of the REIT and the Operating Partnership on the following terms, effective as of the effective date of the Registration Statement on Form S-11 with respect to the initial public offering of shares of the REIT’s common stock (the “IPO”) or such earlier date as may otherwise be mutually agreed to by you and the Company (the “Effective Date”):

1. POSITION, DUTIES AND RESPONSIBILITIES. As of the Effective Date, the Company will employ you, and you agree to be employed by the Company, as Vice President of the REIT and the Operating Partnership. In the capacity of Vice President, you will have such duties and responsibilities as are normally associated with such position and will devote your full business time and attention serving the Company in such position. Your duties may be changed from time to time by the Company, consistent with your position. You will report to the Chief Executive Officer of the REIT or the Operating Partnership, as applicable, and will work full-time at our principal offices located in Menlo Park, California (or such other location as the Company may utilize as its principal or regional offices), except for travel to other locations as may be necessary to fulfill your responsibilities. At the Company’s request, you will serve the Company and/or its subsidiaries and affiliates in other offices and capacities in addition to the foregoing. In the event that you serve in any one or more of such additional capacities, your compensation will not be increased beyond that specified in this letter. In addition, in the event your service in one or more of such additional capacities is terminated, your compensation, as specified in this letter, will not be diminished or reduced in any manner as a result of such termination for so long as you otherwise remain employed under the terms of this letter.

2. BASE COMPENSATION. During your employment with the Company, the Company will pay you a base salary of $150,000 per year, less payroll deductions and all required withholdings, payable in accordance with the Company’s normal payroll practices and prorated for any partial month of employment. Your base salary may be subject to adjustment pursuant to the Company’s policies as in effect from time to time.

3. ANNUAL BONUS. In addition to the base salary set forth above, during your employment with the Company, you will be eligible to participate in the Company’s incentive bonus plan applicable to similarly situated employees of the Company. The amount of your annual bonus will be based on the attainment of performance criteria established and evaluated by the Company in accordance with the terms of such bonus plan as in effect from time to time, provided that, subject to the terms of such bonus plan, your target and maximum annual bonus shall initially be 50% and 75%, respectively, of your base salary actually paid for such year.

4. PROFITS INTEREST AWARD. Subject to adoption by the Board of Directors of the REIT (the “Board”) and approval by the REIT’s stockholders of the Company’s incentive award plan (the “Incentive Plan”), as of the effective date of the Registration Statement on Form S-11 with respect to the IPO (the “Pricing Date”), the Operating Partnership agrees to issue to you, and you agree to accept from the Operating Partnership as part of your compensation for services rendered to or for the benefit of the Operating Partnership in your capacity as a partner, that number of Profits Interest Units (as defined the Amended and Restated Agreement of Limited Partnership of Digital Realty, L.P.) which is equal to 0.375% of the Management Units Pool (as defined below) (the “Profits Interest Units”). The Profits Interest Units shall be vested in full as of the Pricing Date. Consistent with the foregoing, the terms and conditions of the Profits Interest Units (including, without limitation, transfer restrictions with respect thereto) shall be set forth in a profits interest agreement to be entered into by the Company and you which shall evidence the grant of the Profits Interest Units (the “Profits Interest Agreement”). For purposes of this letter, “Management Units Pool” shall mean that number of units equal to three percent (3%) of the total number of shares of the REIT’s common stock expected to be outstanding (on a fully diluted basis) upon the closing of the IPO, as set forth in the preliminary prospectus printed and distributed to potential investors in connection with the marketing of the IPO (or, if a subsequent preliminary prospectus is thereafter printed and recirculated to potential investors, then as set forth in such subsequent preliminary prospectus) (the “Preliminary Prospectus”).

5. STOCK OPTION AWARD. Subject to adoption by the Board and approval by the REIT’s stockholders of the Incentive Plan, as of the Pricing Date, the REIT agrees to grant to you in your capacity as an employee of the REIT or any “subsidiary corporation” thereof (within the meaning of Section 424(f) of the Internal Revenue Code of 1986, as amended (the “Code”)), and you agree to accept, a stock option to purchase that number of shares of the REIT’s common stock which is equal to five percent (5%) of the Management Options Pool (as defined below) (the “Stock Option”). The Stock Option shall be granted to you as an “incentive stock option” (within the meaning of Section 422 of the Code) under the Incentive Plan at an exercise price per share equal to the initial public offering price of a share of the REIT’s common stock. Subject to your continued employment with the Company, the Stock Option shall vest and become exercisable with respect to twenty-five percent (25%) of the shares subject thereto on each of the first four anniversaries of the date of grant, provided that the Stock Option shall become fully vested and exercisable in the event of a Change in Control (as defined in the Incentive Plan). Consistent with the foregoing, the terms and conditions of the Stock Option shall be set forth in a stock option agreement to be entered into by the Company and you which shall evidence the grant of the Stock Option (the “Stock Option Agreement”). For purposes of this letter,

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“Management Options Pool” shall mean that number of shares which is equal to one and one-half percent (1.5%) of the total number of shares of the REIT’s common stock expected to be outstanding (on a fully diluted basis) upon the closing of the IPO, as set forth in the Preliminary Prospectus.

6. BENEFITS AND VACATION. During your employment with the Company, you will be eligible to participate in all incentive, savings and retirement plans, practices, policies and programs maintained or sponsored by the Company from time to time which are applicable to other similarly situated employees of the Company, subject to the terms and conditions thereof. During such employment, you will also be eligible for standard benefits, such as medical insurance, sick leave, vacations and holidays to the extent applicable generally to other similarly situated employees of the Company, subject to the terms and conditions of the applicable Company plans or policies.

7. AT-WILL EMPLOYMENT. Your employment with the Company is “at-will,” and either you or the Company may terminate your employment for any reason whatsoever (or for no reason) by giving 15 days prior written notice of such termination to the other party. This at-will employment relationship cannot be changed except in a writing signed by you and an authorized representative of the Company.

8. TERMINATION OF EMPLOYMENT. In the event of a termination of your employment hereunder by the Company without Cause (as defined below), then, in addition to any other accrued amounts payable to you through the date of termination of your employment, the Company will pay you severance payments in the form of salary continuation for a period of six months following your termination of employment at a rate equal to your then current annual base salary, but in no event shall you or your estate or beneficiaries be entitled to any such payment hereunder upon any termination of your employment by reason of your total and permanent disability or your death. Your right to receive the severance payments set forth herein is conditioned on and subject to your execution and non-revocation of a general release of claims against the Digital Group, in a form reasonably acceptable to the Company.

For purposes of this letter, “Cause” will be determined in the reasonable discretion of the Company, and will include, without limitation, the following: (i) material failure by you to exercise a reasonable level of skill and efficiency in performing your duties or responsibilities; (ii) misconduct by you which injures the general reputation of any member of the Digital Group or interferes with contracts or operations of any member of the Digital Group; (iii) your conviction of, or entry of a guilty or no contest plea to, a felony or any crime involving moral turpitude; (iv) fraud, misrepresentation, or breach of trust by you in the course of your employment which adversely affects any member of the Digital Group; (v) your willful and gross misconduct in the performance of your duties hereunder that results in economic or other injury to the Company or its subsidiaries or affiliates; (vi) a material breach of your covenants set forth in Section 9 below; or (vii) a material breach by you of any of your obligations under this letter.

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9. CONFIDENTIALITY AND NON-SOLICITATION.

(a) As a condition of your employment with the Company, you agree that during the term of such employment and thereafter, you will not directly or indirectly disclose or appropriate to your own use, or the use of any third party, any trade secret or confidential information concerning the REIT, the Operating Partnership, or their respective subsidiaries or affiliates (collectively, the “Digital Group”) or their businesses, whether or not developed by you, except as it is required in connection with your services rendered for the Company. You further agree that, upon termination of your employment, you will not receive or remove from the files or offices of the Digital Group any originals or copies of documents or other materials maintained in the ordinary course of business of the Digital Group, and that you will return any such documents or materials otherwise in your possession. You further agree that, upon termination of your employment, you will maintain in strict confidence the projects in which any member of the Digital Group is involved or contemplating.

(b) You further agree that during the term of such employment and for six months after your employment is terminated, you will not directly or indirectly solicit, induce, or encourage any employee, consultant, agent, customer, vendor, or other parties doing business with any member of the Digital Group to terminate their employment, agency, or other relationship with the Digital Group or such member or to render services for or transfer their business from the Digital Group or such member and you will not initiate discussion with any such person for any such purpose or authorize or knowingly cooperate with the taking of any such actions by any other individual or entity.

(c) In recognition of the facts that irreparable injury will result to the Company in the event of a breach by you of your obligations under Sections 9(a) and (b) above, that monetary damages for such breach would not be readily calculable, and that the Company would not have an adequate remedy at law therefor, you acknowledge, consent and agree that in the event of such breach, or the threat thereof, the Company shall be entitled, in addition to any other legal remedies and damages available, to specific performance thereof and to temporary and permanent injunctive relief (without the necessity of posting a bond) to restrain the violation or threatened violation of such obligations by you.

10. COMPANY RULES AND REGULATIONS. As an employee of the Company, you agree to abide by Company rules and regulations as set forth in the Company’s Employee Handbook or as otherwise promulgated.

11. PAYMENT OF FINANCIAL OBLIGATIONS. In the event that your employment is shared among the Company and/or its subsidiaries and affiliates, the payment or provision to you by the Company of any remuneration, benefits or other financial obligations pursuant to this letter may be allocated to the Company and, as applicable, its subsidiaries and/or affiliates in accordance with an employee sharing or expense allocation agreement entered into by such parties.

12. WITHHOLDING. The Company may withhold from any amounts payable under this letter such Federal, state, local or foreign taxes as shall be required to be withheld pursuant to any applicable law or regulation.

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13. ARBITRATION. Except as set forth in Section 9(c) above, any disagreement, dispute, controversy or claim arising out of or relating to this letter or the interpretation of this letter or any arrangements relating to this letter or contemplated in this letter or the breach, termination or invalidity thereof shall be settled by final and binding arbitration administered by JAMS/Endispute in San Francisco, California in accordance with the then existing JAMS/Endispute Arbitration Rules and Procedures for Employment Disputes. Except as provided herein, the Federal Arbitration Act shall govern the interpretation, enforcement and all proceedings. The arbitrator shall apply the substantive law (and the law of remedies, if applicable) of the state of California, or federal law, or both, as applicable, and the arbitrator is without jurisdiction to apply any different substantive law. The arbitrator shall have the authority to entertain a motion to dismiss and/or a motion for summary judgment by any party and shall apply the standards governing such motions under the Federal Rules of Civil Procedure. Judgment upon the award may be entered in any court having jurisdiction thereof. Each party shall pay his or its own attorneys’ fees and expenses associated with such arbitration to the extent permitted by applicable law.

14. ENTIRE AGREEMENT. As of the Effective Date, this letter, together with the Profits Interest Agreement and the Stock Option Agreement, constitutes the final, complete and exclusive agreement between you and the Company with respect to the subject matter hereof and replaces and supersedes any and all other agreements, offers or promises, whether oral or written, made to you by any member of the Digital Group or any entity, or representative thereof, whose business or assets any member of the Digital Group succeeded to in connection with the initial public offering of the REIT’s common stock or the transactions related thereto. You agree that any such agreement, offer or promise is hereby terminated and will be of no further force or effect, and that upon his execution of this letter, you will have no right or interest in or with respect to any such agreement, offer or promise. In the event that the Effective Date does not occur, this letter (including, without limitation, the immediately preceding sentence) shall have no force or effect.

15. ACKNOWLEDGEMENT. You hereby acknowledge (a) that you have consulted with or have had the opportunity to consult with independent counsel of your own choice concerning this letter, and have been advised to do so by the Company, and (b) that you have read and understand this letter, are fully aware of its legal effect, and have entered into it freely based on your own judgment.

[SIGNATURE PAGE FOLLOWS]

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Please confirm your agreement to the foregoing by signing and dating the enclosed duplicate original of this letter in the space provided below for your signature and returning it to Bill Stein. Please retain one fully executed original for your files.

Sincerely,
Digital Realty Trust, Inc., a Maryland corporation
By:	/s/ Michael F. Foust
Name: Michael F. Foust
Title: Chief Executive Officer
Digital Realty, L.P., a Maryland limited partnership
By: Digital Realty Trust, Inc.
Its: General Partner
By:	/s/ Michael F. Foust
Name: Michael F. Foust
Title: Chief Executive Officer

Accepted and Agreed,

this 30^th day of July, 2004.

By:	/s/ Dave Caron
	Dave Caron
Address:
#####
#####

6

EX-10.2

Exhibit 10.2

FIRST AMENDMENT TO

EMPLOYMENT AGREEMENT

THIS FIRST AMENDMENT TO EMPLOYMENT AGREEMENT (this “First Amendment”), is entered into as of December 4, 2008, by and between Digital Realty Trust, Inc. (the “REIT”) and Digital Realty, L.P. (the “Operating Partnership” and together with the REIT, the “Company”), and David Caron ( “Executive”). Capitalized terms used and not otherwise defined herein shall have the meanings ascribed to such terms in the Employment Agreement (as defined below).

WHEREAS, the Company and Executive have entered into that certain Employment Agreement (the “Employment Agreement”), dated as of July 30, 2004, which sets forth the terms and conditions of Executive’s employment by the Company; and

WHEREAS, the Company and Executive desire to amend the Employment Agreement as set forth in this First Amendment.

NOW, THEREFORE, in consideration of the premises set forth herein and for other good and valuable consideration, the receipt and adequacy of which is hereby acknowledged, the Company and Executive hereby amend the Employment Agreement as follows, effective as of the date first above written:

1. Section 3 of the Employment Agreement is hereby amended by adding the following to the end thereof:

“Any annual bonus that becomes payable to you is intended to satisfy the short-term deferral exemption under Treasury Regulation Section 1.409A-1(b)(4) and shall be made not later than the last day of the applicable two and one-half (2 ¹/2) month “short-term deferral period” with respect to such annual bonus, within the meaning of Treasury Regulation Section 1.409A-1(b)(4).”

2. Section 8 of the Employment Agreement is hereby amended and restated in its entirety as follows:

“8. TERMINATION OF EMPLOYMENT.

(a) Without Cause. Subject to Section 8(c) below, in the event of a termination of your employment hereunder by the Company without Cause (as defined below), then, subject to Section 8(b) below, in addition to any other accrued amounts payable to you through the date of termination of your employment (such date, the “Termination Date”), the Company will pay you within 60 days after your Termination Date (with the exact payment date to be determined by the Company in its discretion), a lump sum payment equal to 50% of your annual base salary as in effect on the Termination Date; provided, however, in no event shall you or your estate or beneficiaries be entitled to any such payment hereunder upon any termination of your employment by reason of your total and permanent disability or your death.

(b) Potential Six-Month Delay. Notwithstanding anything to the contrary in this letter, no compensation or benefits, including without limitation any termination payments or benefits payable under this Section 8, shall be paid to you during the 6-month period following your “separation from service” from the Company (within the meaning of Section 409A(a)(2)(A)(i) of the Code) to the extent that the Company determines that paying such amounts at the time or times indicated in this letter would be a prohibited distribution under Section 409A(a)(2)(B)(i) of the Code. If the payment of any such amounts is delayed as a result of the previous sentence, then on the first business day following the end of such 6-month period (or such earlier date upon which such amount can be paid under Section 409A of the Code without resulting in a prohibited distribution, including as a result of your death), the Company shall pay you a lump-sum amount equal to the cumulative amount that would have otherwise been payable to you during such 6-month period, plus interest thereon from the Termination Date through the payment date at a rate equal to the then-current “applicable Federal rate” determined under Section 7872(f)(2)(A) of the Code.

(c) Release. Your right to receive the payments and benefits set forth in this Section 8 is conditioned on and subject to your execution within 21 days (or, to the extent required by applicable law, 45 days) following the Termination Date and non-revocation within 7 days thereafter of a general release of claims against the Digital Group, in a form reasonably acceptable to the Company.

(d) Definition of Cause. For purposes of this letter, “Cause” will be determined in the reasonable discretion of the Company, and will include, without limitation, the following: (i) material failure by you to exercise a reasonable level of skill and efficiency in performing your duties or responsibilities; (ii) misconduct by you which injures the general reputation of any member of the Digital Group or interferes with contracts or operations of any member of the Digital Group; (iii) your conviction of, or entry of a guilty or no contest plea to, a felony or any crime involving moral turpitude; (iv) fraud, misrepresentation, or breach of trust by you in the course of your employment which adversely affects any member of the Digital Group; (v) your willful and gross misconduct in the performance of your duties hereunder that results in economic or other injury to the Company or its subsidiaries or affiliates; (vi) a material breach of your covenants set forth in Section 9 below; or (vii) a material breach by you of any of your obligations under this letter.”

3. Section 13 of the Employment Agreement is hereby amended and restated in its entirety as follows:

“13. RESERVED.”

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4. Section 14 of the Employment Agreement is hereby amended by adding the following to the end thereof:

“This letter may not be amended or modified otherwise than by a written agreement executed by the parties hereto or their respective successors and legal representatives.”

5. The following Sections 16, 17, and 18 shall be added immediately after Section 15 of the Employment Agreement:

“16. CODE SECTION 409A.

(a) To the extent applicable, this Agreement shall be interpreted and applied consistent and in accordance with Section 409A of the Code and Department of Treasury regulations and other interpretive guidance issued thereunder. Notwithstanding any provision of this Agreement to the contrary, if at any time the Company determines that any compensation or benefits payable under this Agreement may not be either exempt from or compliant with Section 409A of the Code and related Department of Treasury guidance, the Company may adopt such amendments to this Agreement or adopt other policies and procedures (including amendments, policies and procedures with retroactive effect), or take any other actions, that the Company determines are necessary or appropriate to (i) exempt the compensation and benefits payable under this Agreement from Section 409A of the Code and/or preserve the intended tax treatment of such compensation and benefits, or (ii) comply with the requirements of Section 409A of the Code and related Department of Treasury guidance; provided, however, that this Section 16(a) shall not create an obligation on the part of the Company to adopt any such amendment, policy or procedure or take any such other action.

(b) To the extent permitted under Section 409A of the Code, any separate payment or benefit under this Agreement or otherwise shall not be deemed “nonqualified deferred compensation” subject to Section 409A of the Code and Section 8(b) hereof to the extent provided in the exceptions in Treasury Regulation Section 1.409A-1(b)(4), Section 1.409A-1(b)(9) or any other applicable exception or provision of Section 409A of the Code.

(c) To the extent that compensation or benefits payable under Section 8 of this Agreement (i) constitute “nonqualified deferred compensation” within the meaning of Section 409A of the Code or (ii) are intended to be exempt from Section 409A of the Code under Treasury Regulation Section 1.409A-1(b)(9)(iii), and are designated under this Agreement as payable upon (or within a specified time following) your termination of employment, such compensation or benefits shall, subject to Section 8(b) hereof, be payable only upon (or, as applicable, within the specified time following) your “separation from service” from the Company (within the meaning of Section 409A(a)(2)(A)(i) of the Code).

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(d) To the extent that any payments or reimbursements provided to you under this Agreement are deemed to constitute compensation to which Treasury Regulation Section 1.409A-3(i)(1)(iv) would apply, such amounts shall be paid or reimbursed to you reasonably promptly, but not later than December 31 of the year following the year in which the expense was incurred. The amount of any such payments eligible for reimbursement in one year shall not affect the payments or expenses that are eligible for payment or reimbursement in any other taxable year, and your right to such payments or reimbursement shall not be subject to liquidation or exchange for any other benefit.

17. ASSUMPTION BY SUCCESSOR. The Company shall require any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company to assume and agree to perform this letter in the same manner and to the same extent that the Company would be required to perform it if no such succession had taken place.

18. GOVERNING LAW. This letter shall be governed by and construed in accordance with the laws of the State of California, without regard to conflicts of laws principles thereof.”

6. This First Amendment shall be and is hereby incorporated in and forms a part of the Employment Agreement.

7. Except as amended and set forth herein, the Employment Agreement shall continue in full force and effect.

[Signature Page Follows]

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IN WITNESS WHEREOF, this First Amendment has been executed and delivered by the parties hereto.

DIGITAL REALTY TRUST, INC.
By:	/s/ Ellen Jacobs
Name:	Ellen Jacobs
Title:	Vice President, Corporate Services & Human Resources
DIGITAL REALTY, L.P.
By:	/s/ Ellen Jacobs
Name:	Ellen Jacobs
Title:	Vice President, Corporate Services & Human Resources

EXECUTIVE

/s/ David Caron

David Caron

S-5

EX-12.1

Exhibit 12.1

Digital Realty Trust, Inc. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)

	Three Months Ended March 31,				Year Ended December 31,
	2011		2010		2010		2009			2008			2007
Income from continuing operations before noncontrolling interests	$	39,012	$	25,586	$	105,412	$	91,234		$	67,918		$	22,546
Interest expense		36,082		30,902		137,384		88,442			63,621			67,054
Interest within rental expense		700		621		2,604		2,633			2,619			1,971
Noncontrolling interests in consolidated joint ventures		142		232		288		(140	)		(335	)		—
Earnings available to cover fixed charges	$	75,936	$	57,341	$	245,688	$	182,169		$	133,823		$	91,571
Fixed charges:
Interest expense		36,082		30,902	$	137,384	$	88,442		$	63,621		$	67,054
Interest within rental expense (2)		700		621		2,604		2,633			2,619			1,971
Capitalized interest		4,666		1,907		10,241		9,196			18,351			12,264
		41,448		33,430		150,229		100,271			84,591			81,289
Preferred stock dividends		6,522		10,101		37,004		40,404			38,564			19,330
Fixed charges and preferred stock dividends	$	47,970	$	43,531	$	187,233	$	140,675		$	123,155		$	100,619
Ratio of earnings to fixed charges		1.83		1.72		1.64		1.82			1.58			1.13
Ratio of earnings to fixed charges and preferred stock dividends		1.58		1.32		1.31		1.29			1.09			—	(3)

(1) All numbers presented in this exhibit exclude 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).

(2) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

(3) For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred dividends by $9,048.

Digital Realty Trust, L.P. and Subsidiaries

Statement of Computation of Ratios (1)

(in thousands, except ratios)

	Three Months Ended March 31,				Year Ended December 31,
	2011		2010		2010		2009			2008			2007
Income from continuing operations before noncontrolling interests	$	39,012	$	25,586	$	105,412	$	91,234		$	67,918		$	22,546
Interest expense		36,082		30,902		137,384		88,442			63,621			67,054
Interest within rental expense		700		621		2,604		2,633			2,619			1,971
Noncontrolling interests in consolidated joint ventures		142		232		288		(140	)		(335	)		—
Earnings available to cover fixed charges	$	75,936	$	57,341	$	245,688	$	182,169		$	133,823		$	91,571
Fixed charges:
Interest expense		36,082		30,902	$	137,384	$	88,442		$	63,621		$	67,054
Interest within rental expense (2)		700		621		2,604		2,633			2,619			1,971
Capitalized interest		4,666		1,907		10,241		9,196			18,351			12,264
		41,448		33,430		150,229		100,271			84,591			81,289
Preferred unit distributions		6,522		10,101		37,004		40,404			38,564			19,330
Fixed charges and preferred unit distributions	$	47,970	$	43,531	$	187,233	$	140,675		$	123,155		$	100,619
Ratio of earnings to fixed charges		1.83		1.72		1.64		1.82			1.58			1.13
Ratio of earnings to fixed charges and preferred unit distributions		1.58		1.32		1.31		1.29			1.09			—	(3)

(1) All numbers presented in this exhibit exclude 100 Technology Center Drive (sold in March 2007) and 4055 Valley View Lane (sold in March 2007).

(2) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).

(3) For the year ended December 31, 2007, earnings were insufficient to cover fixed charges and preferred distributions by $9,048.

EX-31.1

Exhibit 31.1

Certification of Principal Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael F. Foust, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

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(s) 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(s) 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.

Dated: May 9, 2011

By:	/s/ MICHAEL F. FOUST
	Michael F. Foust
	Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, Inc.;

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(s) 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(s) 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.

Dated: May 9, 2011

By:	/s/ A. WILLIAM STEIN
	A. William Stein
	Chief Financial Officer and Chief Investment Officer (Principal Financial Officer)

EX-31.3

Exhibit 31.3

Certification of Principal Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Michael F. Foust, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, 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(s) 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(s) 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.

Dated: May 9, 2011

By:	/s/ MICHAEL F. FOUST
	Michael F. Foust
	Chief Executive Officer (Principal Executive Officer) Digital Realty Trust, Inc., sole general partner of Digital Realty Trust, L.P.

EX-31.4

Exhibit 31.4

Certification of Principal Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, A. William Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Digital Realty Trust, 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(s) 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(s) 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.

Dated: May 9, 2011

By:	/s/ A. WILLIAM STEIN
	A. William Stein
	Chief Financial Officer and Chief Investment Officer (Principal Financial Officer) Digital Realty Trust, Inc., sole general partner of Digital Realty Trust, L.P.

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended March 31, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) 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 at the dates and for the periods indicated.

Dated: May 9, 2011

/s/ MICHAEL F. FOUST

Michael F. Foust

Chief Executive Officer

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A 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. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended March 31, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) 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 at the dates and for the periods indicated.

Dated: May 9, 2011

/s/ A. WILLIAM STEIN

A. William Stein

Chief Financial Officer

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Company filed under the Securities Act of 1933, as amended.

A 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. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, L.P. (the “Operating Partnership”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended March 31, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) 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 at the dates and for the periods indicated.

Dated: May 9, 2011

/s/ MICHAEL F. FOUST

Michael F. Foust

Chief Executive Officer

Digital Realty Trust, Inc., sole general partner of

Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company 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. Section 1350, as

Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Digital Realty Trust, L.P. (the “Operating Partnership”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarterly period ended March 31, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) 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 at the dates and for the periods indicated.

Dated: May 9, 2011

/s/ A. WILLIAM STEIN

A. William Stein

Chief Financial Officer

Digital Realty Trust, Inc., sole general partner of

Digital Realty Trust, L.P.

Pursuant to Securities and Exchange Commission Release 33-8238, dated June 5, 2003, this certification is being furnished and shall not be deemed filed by the Operating Partnership for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference in any registration statement of the Operating Partnership filed under the Securities Act of 1933, as amended.

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.