10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC  20549 

FORM 10-Q

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

For the quarterly period ended September 30, 2020

OR 

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

Commission File Number 1-15319 

DIVERSIFIED HEALTHCARE TRUST

(Exact Name of Registrant as Specified in Its Charter) 

Maryland	04-3445278
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification No.)

 Two Newton Place, 255 Washington Street, Suite 300, Newton, MA 02458-1634

(Address of Principal Executive Offices) (Zip Code) 

617 - 796 - 8350

(Registrant's Telephone Number, Including Area Code)

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

Title Of Each Class	Trading Symbol(s)	Name Of Each Exchange On Which Registered
Common Shares of Beneficial Interest	DHC	The Nasdaq Stock Market LLC
5.625% Senior Notes due 2042	DHCNI	The Nasdaq Stock Market LLC
6.25% Senior Notes due 2046	DHCNL	The Nasdaq Stock Market LLC

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.  Yes ☒  No ☐ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files).  Yes ☒  No ☐ 

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

Large Accelerated Filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ☐  No ☒

Number of registrant's common shares outstanding as of November 2, 2020: 238,268,478

DIVERSIFIED HEALTHCARE TRUST

FORM 10-Q

September 30, 2020

INDEX

		Page
PART I	Financial Information
Item 1.	Financial Statements (unaudited)	1
	Condensed Consolidated Balance Sheets — September 30, 2020 and December 31, 2019	1
	Condensed Consolidated Statements of Comprehensive Income (Loss) — Three and Nine Months Ended September 30, 2020 and 2019	2
	Condensed Consolidated Statements of Shareholders' Equity — Three and Nine Months Ended September 30, 2020 and 2019	3
	Condensed Consolidated Statements of Cash Flows — Nine Months Ended September 30, 2020 and 2019	5
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	52
Item 4.	Controls and Procedures	54
	Warning Concerning Forward-Looking Statements	55
	Statement Concerning Limited Liability	60
PART II	Other Information	61
Item 1A.	Risk Factors	61
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	64
Item 6.	Exhibits	64
	Signatures	66

References in this Quarterly Report on Form 10-Q to the Company, we, us or our include Diversified Healthcare Trust and its consolidated subsidiaries unless otherwise expressly stated or the context indicates otherwise.

PART I.  Financial Information

Item 1.  Financial Statements.

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED BALANCE SHEETS

(dollars in thousands, except share data)

(unaudited) 

	September 30,		December 31,
	2020		2019
Assets
Real estate properties:
Land	$	792,343	$	793,123
Buildings and improvements	6,579,388		6,668,463
Total real estate properties, gross	7,371,731		7,461,586
Accumulated depreciation	(1,651,864)		(1,570,801)
Total real estate properties, net	5,719,867		5,890,785
Assets of properties held for sale	164,363		209,570
Cash and cash equivalents	82,241		37,357
Restricted cash	16,134		14,867
Acquired real estate leases and other intangible assets, net	298,429		337,875
Other assets, net	254,084		163,372
Total assets	$	6,535,118	$	6,653,826
Liabilities and Equity
Unsecured revolving credit facility	$	—	$	537,500
Unsecured term loans, net	198,913		448,741
Senior unsecured notes, net	2,606,550		1,820,681
Secured debt and finance leases, net	692,385		694,739
Liabilities of properties held for sale	7,834		6,758
Accrued interest	53,681		24,060
Assumed real estate lease obligations, net	70,046		76,705
Other liabilities	264,003		167,592
Total liabilities	3,893,412		3,776,776
Commitments and contingencies
Equity:
Equity attributable to common shareholders:
Common shares of beneficial interest, $.01 par value: 300,000,000 shares authorized, 238,268,478 and 237,897,163 shares issued and outstanding, respectively	2,383		2,379
Additional paid in capital	4,613,501		4,612,511
Cumulative net income	1,929,337		2,052,562
Cumulative distributions	(4,031,177)		(3,930,933)
Total equity attributable to common shareholders	2,514,044		2,736,519
Noncontrolling interest:
Total equity attributable to noncontrolling interest	127,662		140,531
Total equity	2,641,706		2,877,050
Total liabilities and equity	$	6,535,118	$	6,653,826

 The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

1

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(amounts in thousands, except per share data)

(unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Revenues:
Rental income	$	104,238	$	148,011	$	320,943	$	459,349
Residents fees and services	290,101		107,816		926,174		324,767
Total revenues	394,339		255,827		1,247,117		784,116
Expenses:
Property operating expenses	315,650		125,083		934,150		362,498
Depreciation and amortization	67,211		73,368		204,466		219,522
General and administrative	6,988		9,604		23,132		28,287
Acquisition and certain other transaction related costs	53		2,492		803		11,209
Impairment of assets	64,202		33,099		106,611		41,518
Total expenses	454,104		243,646		1,269,162		663,034
(Loss) gain on sale of properties	(211)		4,183		2,403		21,893
Dividend income	—		—		—		1,846
Gains and losses on equity securities, net	12,510		40		14,541		(41,476)
Interest and other income	134		238		8,008		590
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,448, $1,421, $5,574 and $4,592, respectively)	(58,091)		(44,817)		(143,715)		(136,840)
Gain on lease termination	—		—		22,896		—
Loss on early extinguishment of debt	—		—		(427)		(17)
Loss from continuing operations before income tax (expense) benefit and equity in earnings of an investee	(105,423)		(28,175)		(118,339)		(32,922)
Income tax (expense) benefit	(365)		146		(1,048)		47
Equity in earnings of an investee	—		83		—		617
Net loss	(105,788)		(27,946)		(119,387)		(32,258)
Net income attributable to noncontrolling interest	(1,100)		(1,444)		(3,838)		(4,279)
Net loss attributable to common shareholders	$	(106,888)	$	(29,390)	$	(123,225)	$	(36,537)
Other comprehensive (loss) income:
Equity in unrealized (loss) gain of an investee	—		(46)		—		91
Other comprehensive (loss) income	—		(46)		—		91
Comprehensive loss	(105,788)		(27,992)		(119,387)		(32,167)
Comprehensive income attributable to noncontrolling interest	(1,100)		(1,444)		(3,838)		(4,279)
Comprehensive loss attributable to common shareholders	$	(106,888)	$	(29,436)	$	(123,225)	$	(36,446)
Weighted average common shares outstanding (basic)	237,752		237,608		237,707		237,585
Weighted average common shares outstanding (diluted)	237,752		237,608		237,707		237,585
Per common share amounts (basic and diluted):
Net loss attributable to common shareholders	$	(0.45)	$	(0.12)	$	(0.52)	$	(0.15)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

2

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(dollars in thousands)

(unaudited)

	Number of Shares	Common Shares		Additional Paid In Capital		Cumulative Net Income		Cumulative Distributions		Total Equity Attributable to Common Shareholders		Total Equity Attributable to Noncontrolling Interest		Total Equity
Balance at December 31, 2019:	237,897,163	$	2,379	$	4,612,511	$	2,052,562	$	(3,930,933)	$	2,736,519	$	140,531	$	2,877,050
Net income	—	—		—		9,735		—		9,735		1,408		11,143
Distributions	—	—		—		—		(35,684)		(35,684)		—		(35,684)
Distribution to common shareholders of the right to receive Five Star Senior Living Inc. common stock	—	—		—		—		(59,801)		(59,801)		—		(59,801)
Share grants	—	—		249		—		—		249		—		249
Share repurchases	(3,438)	—		(21)		—		—		(21)		—		(21)
Distributions to noncontrolling interest	—	—		—		—		—		—		(5,767)		(5,767)
Balance at March 31, 2020:	237,893,725	2,379		4,612,739		2,062,297		(4,026,418)		2,650,997		136,172		2,787,169
Net (loss) income	—	—		—		(26,072)		—		(26,072)		1,330		(24,742)
Distributions	—	—		—		—		(2,379)		(2,379)		—		(2,379)
Share grants	60,000	1		415		—		—		416		—		416
Share repurchases	(1,757)	—		(8)		—		—		(8)		—		(8)
Distributions to noncontrolling interest	—	—		—		—		—		—		(5,616)		(5,616)
Balance at June 30, 2020:	237,951,968	2,380		4,613,146		2,036,225		(4,028,797)		2,622,954		131,886		2,754,840
Net (loss) income	—	—		—		(106,888)		—		(106,888)		1,100		(105,788)
Distributions	—	—		—		—		(2,380)		(2,380)		—		(2,380)
Share grants	360,000	3		503		—		—		506		—		506
Share repurchases	(42,180)	—		(142)		—		—		(142)		—		(142)
Share forfeitures	(1,310)	—		(6)		—		—		(6)		—		(6)
Distributions to noncontrolling interest	—	—		—		—		—		—		(5,324)		(5,324)
Balance at September 30, 2020:	238,268,478	$	2,383	$	4,613,501	$	1,929,337	$	(4,031,177)	$	2,514,044	$	127,662	$	2,641,706

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (CONTINUED)

(dollars in thousands)

(unaudited)

	Number of Shares	Common Shares		Additional Paid In Capital		Cumulative Net Income		Cumulative Other Comprehensive Income (Loss)		Cumulative Distributions		Total Equity Attributable to Common Shareholders		Total Equity Attributable to Noncontrolling Interest		Total Equity
Balance at December 31, 2018:	237,729,900	$	2,377	$	4,611,419	$	2,140,796	$	(266)	$	(3,731,214)	$	3,023,112	$	156,758	$	3,179,870
Net income	—	—		—		30,082		—		—		30,082		1,422		31,504
Other comprehensive income	—	—		—		—		66		—		66		—		66
Distributions	—	—		—		—		—		(92,714)		(92,714)		—		(92,714)
Share grants	—	—		215		—		—		—		215		—		215
Distributions to noncontrolling interest	—	—		—		—		—		—		—		(5,503)		(5,503)
Balance at March 31, 2019:	237,729,900	2,377		4,611,634		2,170,878		(200)		(3,823,928)		2,960,761		152,677		3,113,438
Net (loss) income	—	—		—		(37,229)		—		—		(37,229)		1,413		(35,816)
Other comprehensive income	—	—		—		—		71		—		71		—		71
Distributions	—	—		—		—		—		(35,659)		(35,659)		—		(35,659)
Share grants	15,000	—		395		—		—		—		395		—		395
Share repurchases	(3,529)	—		(33)		—		—		—		(33)		—		(33)
Share forfeitures	(610)	—		(3)		—		—		—		(3)		—		(3)
Distributions to noncontrolling interest	—	—		—		—		—		—		—		(5,684)		(5,684)
Balance at June 30, 2019:	237,740,761	2,377		4,611,993		2,133,649		(129)		(3,859,587)		2,888,303		148,406		3,036,709
Net (loss) income	—	—		—		(29,390)		—		—		(29,390)		1,444		(27,946)
Other comprehensive loss	—	—		—		—		(46)		—		(46)		—		(46)
Distributions	—	—		—		—		—		(35,661)		(35,661)		—		(35,661)
Share grants	187,500	2		530		—		—		—		532		—		532
Share repurchases	(27,984)	—		(259)		—		—		—		(259)		—		(259)
Distributions to noncontrolling interest	—	—		—		—		—		—		—		(5,107)		(5,107)
Balance at September 30, 2019:	237,900,277	$	2,379	$	4,612,264	$	2,104,259	$	(175)	$	(3,895,248)	$	2,823,479	$	144,743	$	2,968,222

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(dollars in thousands)

(unaudited)

	Nine Months Ended September 30,
	2020		2019
Cash flows from operating activities:
Net loss	$	(119,387)	$	(32,258)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization	204,466		219,522
Amortization of debt issuance costs and debt discounts and premiums	5,574		4,592
Straight line rental income	(3,029)		(3,550)
Amortization of acquired real estate leases and other intangible assets	(5,559)		(4,922)
Loss on early extinguishment of debt	51		17
Gain on lease termination	(22,896)		—
Impairment of assets	106,611		41,518
Gain on sale of properties	(2,403)		(21,893)
Gains and losses on equity securities, net	(14,541)		41,476
Other non-cash adjustments, net	(1,662)		(2,828)
Equity in earnings of an investee	—		(617)
Change in assets and liabilities:
Other assets	(39,358)		(6,139)
Accrued interest	29,604		4,126
Other liabilities	21,508		(43,374)
Net cash provided by operating activities	158,979		195,670
Cash flows from investing activities:
Real estate acquisitions and deposits	(2,526)		—
Real estate improvements	(118,141)		(175,146)
Proceeds from sale of properties, net	78,244		50,355
Proceeds from sale of RMR Inc. common shares, net	—		98,557
Distributions in excess of earnings from Affiliates Insurance Company	287		—
Net cash used in investing activities	(42,136)		(26,234)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes, net	985,000		—
Proceeds from borrowings on revolving credit facility	430,500		803,000
Repayments of borrowings on revolving credit facility	(968,000)		(353,000)
Repayment of senior unsecured notes	(200,000)		(400,000)
Repayment of unsecured term loan	(250,000)		—
Repayment of other debt	(5,189)		(45,438)
Loss on early extinguishment of debt settled in cash	(376)		—
Payment of debt issuance costs	(5,306)		—
Repurchase of common shares	(171)		(292)
Distributions to noncontrolling interest	(16,707)		(16,294)
Distributions to shareholders	(40,443)		(164,034)
Net cash used in financing activities	(70,692)		(176,058)
Increase (decrease) in cash and cash equivalents and restricted cash	46,151		(6,622)
Cash and cash equivalents and restricted cash at beginning of period	52,224		70,071
Cash and cash equivalents and restricted cash at end of period	$	98,375	$	63,449

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

5

DIVERSIFIED HEALTHCARE TRUST

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)

(dollars in thousands)

(unaudited)

	Nine Months Ended September 30,
	2020		2019
Supplemental cash flow information:
Interest paid	$	109,689	$	129,010
Income taxes paid	$	381	$	452
Non-cash investing activities:
Five Star Senior Living Inc. common stock	$	97,896	$	—
Transaction Agreement additional consideration	(75,000)		—
Capitalized interest	$	1,152	$	888
Non-cash financing activities:
Distribution to common shareholders of the right to receive Five Star Senior Living Inc. common stock	$	(59,801)	$	—

Supplemental disclosure of cash and cash equivalents and restricted cash:

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within our condensed consolidated balance sheets to the amount shown in our condensed consolidated statements of cash flows:

	As of September 30,
	2020		2019
Cash and cash equivalents	$	82,241	$	49,462
Restricted cash (1)	16,134		13,987
Total cash and cash equivalents and restricted cash shown in our condensed consolidated statements of cash flows	$	98,375	$	63,449

(1) Restricted cash consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties and cash held for the operations of one of our life science properties that is owned in a joint venture arrangement in which we own a 55% equity interest.

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

Note 1.  Basis of Presentation

The accompanying condensed consolidated financial statements of Diversified Healthcare Trust and its subsidiaries, or we, us, or our, are unaudited. Certain information and disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are adequate to make the information presented not misleading. However, the accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2019, or our Annual Report.

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of results for the interim period have been included. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year.

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include purchase price allocations, useful lives of fixed assets and impairments of real estate and intangible assets. We have made reclassifications to the financial statements of prior periods to conform to the current period presentation. These reclassifications had no effect on net income (loss) or equity.

We have been, are currently, and expect in the future to be involved in claims, lawsuits, and regulatory and other governmental audits, investigations and proceedings arising in the ordinary course of our business, some of which may involve material amounts. Also, the defense and resolution of these claims, lawsuits, and regulatory and other governmental audits, investigations and proceedings may require us to incur significant expense. We account for claims and litigation losses in accordance with FASB ASC Topic 450, Contingencies, or ASC 450. Under ASC 450, loss contingency provisions are recorded for probable and estimable losses at our best estimate of a loss or, when a best estimate cannot be made, at our estimate of the minimum loss. These estimates are often developed prior to knowing the amount of the ultimate loss, require the application of considerable judgment, and are refined as additional information becomes known. Accordingly, we are often initially unable to develop a best estimate of loss and therefore the estimated minimum loss amount, which could be zero, is recorded; and then, as information becomes known, the minimum loss amount is updated, as appropriate. A minimum or best estimate amount may be increased or decreased when events result in a changed expectation.

We have a joint venture arrangement with an institutional investor for one of our life science properties located in Boston, Massachusetts. The investor owns a 45% equity interest in the joint venture, and we own the remaining 55% equity interest in the joint venture. We have determined that this joint venture is a variable interest entity, or VIE, as defined under the Consolidation Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification. We concluded that we must consolidate this VIE because we are the entity with the power to direct the activities that most significantly impact the VIE's economic performance and we have the obligation to absorb losses of, and the right to receive benefits from, the VIE that could be significant to the VIE, and therefore are the primary beneficiary of the VIE. The assets of this VIE were $981,204 and $1,015,661 as of September 30, 2020 and December 31, 2019, respectively, and consist primarily of the net real estate owned by the joint venture. The liabilities of this VIE were $698,667 and $704,344 as of September 30, 2020 and December 31, 2019, respectively, and consist primarily of mortgage debts secured by the property. The investor's interest in this consolidated entity is reflected as a noncontrolling interest in our condensed consolidated financial statements. See Note 7 for further information about this joint venture.

Note 2.  Recent Events and Accounting Pronouncements

Recent Events. In March 2020, the World Health Organization declared the outbreak of COVID-19 as a pandemic and, in response to the outbreak, the U.S. Health and Human Services Secretary declared a public health emergency in the United States and many states and municipalities declared public health emergencies. Various governmental and market responses attempting to contain and mitigate the spread of the virus have negatively impacted, and continue to negatively impact, the global economy, including the U.S. economy, and our results of operations, financial position and cash flow. In the United States, individuals are being encouraged to practice social distancing, are generally restricted from gathering in groups and, in

7

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

some areas, either have been or are subject to stay at home orders, which restrict or prohibit social gatherings, travel and non-essential activities outside of their homes. We do not know when these restrictions will abate.

Our result of operations and cash flows from our senior living communities are dependent on our operators' ability to generate returns to us. Senior living community operators have experienced disruptions, including limitations on in-person tours and new move-ins, and are experiencing challenges in attracting new residents to our communities. In addition, our operators are experiencing increased expenses due to increased labor costs, including higher health benefits costs, and increased costs and consumption of supplies, including personal protective equipment, which costs reduce our returns.

As a result of the disruptions caused by the pandemic, we have taken various measures to improve our liquidity and financial flexibility. Since March 2020, we have reduced our quarterly cash distribution rate on our common shares to $0.01 per common share, reduced our planned capital expenditures, issued $1,000,000 of senior notes, repaid all amounts outstanding under our $1,000,000 unsecured revolving credit facility, sold assets for aggregate sales prices of $120,776 and entered agreements to sell additional properties for $167,392. In addition, on June 30, 2020, we amended the agreements that govern our revolving credit facility and our $200,000 term loan. Among other things, the amendments require that we maintain $200,000 of unrestricted cash and/or undrawn availability under our revolving credit facility and restrict our ability to incur additional debt (with the exception of borrowings under our revolving credit facility).

Recent Accounting Pronouncements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. We adopted this standard which was effective as of January 1, 2020 using the modified retrospective approach. The implementation of this standard did not have a material impact in our condensed consolidated financial statements.

Note 3.  Real Estate Properties

As of September 30, 2020, we owned 407 properties located in 37 states and Washington, D.C., including 22 properties classified as held for sale, 10 properties scheduled for closure and/or sale and one life science property owned in a joint venture arrangement in which we own a 55% equity interest.

We regularly evaluate our assets for indicators of impairment. Impairment indicators may include declining tenant or resident occupancy, weak or declining profitability from the property, decreasing tenant cash flows or liquidity, our decision to dispose of an asset before the end of its estimated useful life, and legislative, market or industry changes that could permanently reduce the value of an asset. If indicators of impairment are present, we evaluate the carrying value of the affected assets by comparing it to the expected future cash flows to be generated from those assets. The future cash flows are subjective and are based in part on assumptions regarding hold periods, market rents and terminal capitalization rates. If the sum of these expected future cash flows is less than the carrying value, we reduce the net carrying value of the asset to its estimated fair value.

Acquisition Activities:

In January 2020, we acquired a vacant land parcel adjacent to a property we own in our portfolio of medical office and life science properties, or our Office Portfolio, segment located in Tempe, Arizona for $2,600, excluding acquisition costs.

Disposition Activities:

During the nine months ended September 30, 2020, we sold 17 properties for an aggregate sales price of $80,601, excluding closing costs, as presented in the table below. The sales of these properties do not represent significant dispositions individually or in the aggregate, nor do we believe they represent a strategic shift in our business. As a result, the results of the

8

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

operation for these properties are included in continuing operations through the date of sale of such properties in our condensed consolidated statements of comprehensive income (loss).

Date of Sale	Location	Type of Property	Number of Properties	Square Feet or Number of Units		Sales Price (1)		Gain (loss) on Sale		Impairment of Assets
January 2020	Louisiana	Medical Office	6	40,575	sq. ft.	$	5,925	$	(81)	$	—
February 2020	Pennsylvania	Medical Office	1	50,000	sq. ft.	2,900		—		(47)
March 2020	Texas	Medical Office	1	70,229	sq. ft.	8,779		2,863		—
April 2020	California	Managed Senior Living	3	599	units	47,000		(168)		5,465
June 2020	South Carolina	Medical Office	1	49,242	sq. ft.	3,550		—		2,753
July 2020	Texas	Medical Office	1	6,849	sq. ft.	2,072		(30)		—
July 2020	Connecticut	Medical Office	1	32,162	sq. ft.	625		(25)		267
August 2020	Mississippi	Managed Senior Living	2	116	units	2,500		(42)		227
September 2020	Mississippi	Medical Office	1	78,747	sq. ft.	7,250		(114)		148
			17			$	80,601	$	2,403	$	8,813

(1)Sales price excludes closing costs.

As of September 30, 2020, we had 22 properties classified as held for sale in our condensed consolidated balance sheet as follows:

Type of Property	Number of Properties	Gross Book Value		Impairment of Assets(1)
Managed Senior Living	14	$	52,958	$	33,356
Medical Office	5	69,230		1,524
Triple Net Leased, Senior Living	3	43,603		—
	22	$	165,791	$	34,880

(1)We recorded an aggregate of $34,880 impairment of real estate during the nine months ended September 30, 2020 to adjust the carrying values of certain of these properties to their estimated fair values less costs to sell.

In October and November 2020, the three triple net leased senior living communities and one of the 14 managed senior living communities classified as held for sale in the table above were sold for an aggregate sales price of $49,000, excluding closing costs.

We recorded impairment charges of $3,071 related to six medical office properties and one senior living community that were classified as held for sale during the three months ended March 31, 2020. These properties were subsequently reclassified to held and used as of June 30, 2020.

We also recorded impairment charges of $59,847 during the three and nine months ended September 30, 2020 related to nine of the 10 senior living communities that were scheduled for closure and/or sale as of September 30, 2020.

As of November 2, 2020, we had 21 properties under agreements to sell for an aggregate sales price of approximately $167,392, excluding closing costs. We may not complete the sales of any or all of the properties we currently plan to sell. Also, we may sell some or all of these properties at amounts that are less than currently expected and/or less than the carrying values of such properties and we may incur losses on any such sales as a result.

Note 4.  Leases

We are a lessor of medical office and life science properties, senior living communities and other healthcare related properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the premises demised under the leases; therefore, we have determined to evaluate our leases as lease arrangements.

Certain of our leases provide for base rent payments and in addition may include variable payments. Rental income from operating leases, including any payments derived by index or market based indices, is recognized on a straight line basis over

9

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term.

We increased rental income to record revenue on a straight line basis by $491 and $1,186 for the three months ended September 30, 2020 and 2019, respectively, and $3,029 and $3,550 for the nine months ended September 30, 2020 and 2019, respectively. Rents receivable, excluding properties classified as held for sale, include $102,691 and $99,297 of straight line rent receivables at September 30, 2020 and December 31, 2019, respectively, and are included in other assets, net in our condensed consolidated balance sheets.

We do not include in our measurement of our lease receivables certain variable payments, including changes in the index or market based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. We recognized such payments totaling $18,501 and $19,317 for the three months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $1,428 and $1,506, respectively, and $56,792 and $57,687 for the nine months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $3,522 and $3,906, respectively.

Certain of our tenants have requested relief from their obligations to pay rent due to us in response to the current economic conditions resulting from the COVID-19 pandemic. As of November 2, 2020, we granted requests for certain of our tenants to defer rent payments totaling $2,152. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. We have elected to use the FASB relief package regarding the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. The FASB relief package provides entities with the option to account for lease concessions resulting from the COVID-19 pandemic outside of the existing lease modification guidance if the resulting cash flows from the modified lease are substantially the same as the original lease. Because the majority of the deferred rents referenced above will generally be repaid, the cash flows from the respective leases are substantially the same as before the rent deferrals. These deferred amounts did not negatively impact our operating results for the three and nine months ended September 30, 2020 and, as of September 30, 2020, we recognized $4,467 in our accounts receivable related to these deferred amounts.

Right of Use Asset and Lease Liability. For leases where we are the lessee, we recognized a right of use asset and a lease liability equal to the present value of the minimum lease payments with rental payments being applied to the lease liability and the right of use asset being amortized over the term of the lease. The values of the right of use asset and related liability representing our future obligation under the lease arrangement for which we are the lessee were $4,256 and $4,423, respectively, as of September 30, 2020, and $4,319 and $4,461, respectively, as of December 31, 2019. The right of use asset and related lease liability are included within other assets, net and other liabilities, respectively, within our condensed consolidated balance sheets. In addition, we lease equipment at certain of our managed senior living communities. These leases are short term in nature, are cancelable with no fee or do not result in an annual expense in excess of our capitalization policy and, as a result, are not recorded on our condensed consolidated balance sheets.

Note 5.  Indebtedness

Our principal debt obligations at September 30, 2020 were: (1) $2,650,000 outstanding principal amount of senior unsecured notes; (2) $200,000 outstanding principal amount under our term loan; and (3) $684,962 aggregate principal amount of mortgage notes (excluding premiums, discounts and net debt issuance costs) secured by seven properties, of which $620,000 is related to a joint venture arrangement in which we own a 55% equity interest. These seven mortgaged properties had a gross book value of $946,037 at September 30, 2020. We also had two properties subject to finance leases with lease obligations totaling $8,084 at September 30, 2020; these two properties had gross book value and accumulated depreciation of $35,611 and $17,429, respectively, at September 30, 2020, and the finance leases expire in 2026.

We have a $1,000,000 unsecured revolving credit facility that is available for general business purposes. The maturity date of our revolving credit facility is January 15, 2022, and, subject to the payment of an extension fee and meeting other conditions, we have the option to extend the maturity date of the facility for an additional year. Our revolving credit facility provides that we can borrow, repay and re-borrow funds available under our revolving credit facility until maturity, and no principal repayment is due until maturity. As of September 30, 2020, our revolving credit facility required interest to be paid on

10

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

borrowings at the annual rate of 2.6%, plus a facility fee of 30 basis points per annum on the total amount of lending commitments under the facility.

The weighted average annual interest rates for borrowings under our revolving credit facility were 2.6% and 3.5% for the three months ended September 30, 2020 and 2019, respectively, and 2.2% and 3.5% for the nine months ended September 30, 2020 and 2019, respectively. The interest rate premium and facility fee are each subject to adjustment based upon changes to our credit ratings. As of September 30, 2020 and November 2, 2020, we had no outstanding borrowings and $1,000,000 available for borrowing under our revolving credit facility.

We have a $200,000 unsecured term loan that matures in September 2022 and is prepayable without penalty at any time. At September 30, 2020, the annual interest rate payable on amounts outstanding under this term loan was 2.8%. The weighted average annual interest rate for amounts outstanding under this term loan was 2.7% and 3.6% for the three months ended September 30, 2020 and 2019, respectively, and 2.7% and 3.8% for the nine months ended September 30, 2020 and 2019, respectively. The interest rate premium is subject to adjustment based upon changes to our credit ratings.

In February 2020, we prepaid a mortgage note secured by one of our life science properties with an outstanding principal balance of approximately $1,554, a maturity date in March 2026 and an annual interest rate of 6.25%. As a result of this prepayment, we recorded a loss on early extinguishment of debt of $246 for the nine months ended September 30, 2020. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In April 2020, we redeemed all of our outstanding 6.75% senior notes due 2020 for a redemption price equal to the principal amount of $200,000 plus accrued and unpaid interest of $6,750. We funded this redemption with cash on hand and borrowings under our revolving credit facility.

In May 2020, we prepaid a mortgage note secured by one of our medical office properties with an outstanding principal balance of approximately $1,213, a maturity date in January 2022 and an annual interest rate of 7.49%. As a result of the prepayment of this mortgage note, we recorded a loss on early extinguishment of debt of $155 for the nine months ended September 30, 2020. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In June 2020, we issued $1,000,000 aggregate principal amount of our 9.75% senior notes due 2025 in an underwritten public offering raising net proceeds of $982,300, after deducting estimated offering expenses and underwriters' discounts. These notes are guaranteed by all of our subsidiaries, except for certain excluded subsidiaries, and require semi-annual interest payments through maturity. Prior to June 15, 2022, we may, at our option, redeem all or a portion of these notes at a redemption price equal to the outstanding principal amount of these notes, plus accrued and unpaid interest, plus the make-whole amount set forth in the indenture which governs these notes, as supplemented, or our 2025 Notes Indenture. Prior to June 15, 2022, we may also, at our option, redeem up to 40% of the aggregate principal amount of these notes with the net proceeds of certain equity offerings at the redemption price set forth in the 2025 Notes Indenture, so long as at least 50% of the original aggregate principal amount of these notes remains outstanding after each such redemption. In addition, we have the option to redeem all or a portion of these notes at any time on or after June 15, 2022 at the redemption prices set forth in the 2025 Notes Indenture. We used the net proceeds from this offering to prepay in full our $250,000 unsecured term loan which was scheduled to mature in June 2020 and to reduce amounts outstanding under our revolving credit facility. The weighted average interest rate under our $250,000 senior unsecured term loan was 2.4% for the period from January 1, 2020 to June 2, 2020. As a result of the repayment of our $250,000 senior unsecured term loan, we recorded a loss on early extinguishment of debt of $26 for the nine months ended September 30, 2020.

In June 2020, we amended the agreements governing our $1,000,000 unsecured revolving credit facility and $200,000 unsecured term loan, or collectively, our credit and term loan agreements. The amendments modify certain of the financial covenants under our credit and term loan agreements through June 30, 2021, or the Amendment Period, during which, subject to certain conditions, we will continue to have access to undrawn amounts under our revolving credit facility. We have the right to terminate the Amendment Period prior to June 30, 2021, subject to certain conditions.

During the Amendment Period:

•our interest rate premium over LIBOR under our revolving credit facility and term loan increased by 50 basis points;

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DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

•we will generally be required to apply the net cash proceeds from the disposition of assets, capital markets transactions, debt financings or COVID-19 government stimulus programs, if allowed, to the repayment of outstanding loans under the revolving credit facility, if any;

•we will be subject to certain additional covenants, including additional restrictions on our ability to incur indebtedness (with exceptions for borrowings under our revolving credit facility and certain other categories of secured and unsecured indebtedness), and to acquire real property or make other investments (with exceptions for, among other things, certain categories of capital expenditures and costs);

•we will be required to maintain unrestricted liquidity (unrestricted cash and undrawn availability under our revolving credit facility) of not less than $200,000; and

•our ability to pay distributions on our common shares will be limited to paying a cash dividend of $0.01 per common share per quarter and amounts required to maintain our qualification for taxation as a real estate investment trust, or REIT, and to avoid the payment of certain income and excise taxes.

Our credit and term loan agreements and our senior unsecured notes indentures and their supplements provide for acceleration of payment of all amounts due thereunder upon the occurrence and continuation of certain events of default, such as, in the case of our credit and term loan agreements, a change of control of us, as defined, which includes The RMR Group LLC, or RMR LLC, ceasing to act as our business and property manager. Our credit and term loan agreements and our senior unsecured notes indentures and their supplements also contain covenants, including covenants that restrict our ability to incur debts, and generally require us to maintain certain financial ratios, and our credit and term loan agreements restrict our ability to make distributions under certain circumstances. We believe we were in compliance with the terms and conditions of the respective covenants under our credit and term loan agreements and our senior unsecured notes indentures and their supplements at September 30, 2020. Although we have taken steps to enhance our ability to maintain sufficient liquidity, as noted elsewhere in this Quarterly Report on Form 10-Q, a protracted negative economic impact resulting from the COVID-19 pandemic may cause increased pressure on our ability to satisfy financial and other covenants.

Note 6.  Fair Value of Assets and Liabilities

The following table presents certain of our assets that are measured at fair value at September 30, 2020, categorized by the level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset.

			Fair Value at Reporting Date Using
			Quoted Prices in  Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Recurring Fair Value Measurements Assets:
Investment in Five Star (1)	$	54,207	$	54,207	$	—	$	—
Non-Recurring Fair Value Measurements Assets:
Real estate properties held for sale (2)	$	56,673	$	—	$	56,673	$	—
Real estate properties at fair value (3)	$	31,010	$	—	$	—	$	31,010

(1)Our 10,691,658 shares of common stock of Five Star Senior Living Inc., or Five Star, are included in other assets, net in our condensed consolidated balance sheets, and are reported at fair value, which is based upon quoted market prices on The Nasdaq Stock Market LLC, or Nasdaq, (Level 1 inputs). On April 1, 2019, we entered into a transaction agreement with Five Star, or the Transaction Agreement, to restructure our business arrangements with Five Star, or the Restructuring Transaction. Pursuant to the Transaction Agreement, on January 1, 2020, Five Star issued 10,268,158 Five Star common shares to us. The fair value and initial cost basis of the Five Star common shares issued to us on January 1, 2020 was $38,095. Our adjusted cost basis inclusive of the 423,500 Five Star common shares we owned as of December 31, 2019 and the 10,268,158 Five Star common shares issued to us on January 1, 2020 was $44,448 as of September 30, 2020. During the three and nine months ended September 30, 2020, we recorded unrealized gains of $12,510 and $14,541, respectively, which is included in gains and losses on equity securities, net in

12

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

our condensed consolidated statements of comprehensive income (loss), to adjust the carrying value of our investment in Five Star common shares to their fair value. See Note 12 for further information about our investment in Five Star.

(2)We have assets in our condensed consolidated balance sheets that are measured at fair value on a nonrecurring basis. During the nine months ended September 30, 2020, we recorded impairment charges of $1,524 to reduce the carrying value of one medical office property that is classified as held for sale to its estimated sales price, less estimated costs to sell of $160, based on the sales price under a purchase and sale agreement that we have entered into with a third party buyer for this medical office property of $3,875. We also recorded impairment charges of $33,356 to reduce the carrying value of 14 senior living communities that are classified as held for sale to their estimated sales price, less estimated costs to sell of $1,142, based on the aggregate sales prices under the purchase and sale agreements that we have entered into with third party buyers for these senior living communities of $54,100. See Note 3 for further information about impairment charges and these and other properties we have classified as held for sale.

(3)We recorded impairment charges of $59,847 to reduce the carrying value of nine of our senior living communities scheduled for closure and/or sale to their estimated fair value of $31,010 based upon a combination of the market approach and the income approach and unobservable inputs such as estimated market rent, operating expense assumptions, vacancy data and capitalization rates. We also engaged an external third party to assist us in our estimation of fair value of these communities. The valuation techniques and significant unobservable inputs used in the valuation of these communities are considered Level 3 inputs as defined in the fair value hierarchy under GAAP.

In addition to the assets described in the table above, our financial instruments at September 30, 2020 and December 31, 2019 included cash and cash equivalents, restricted cash, other assets, our revolving credit facility, term loans, senior unsecured notes, secured debt and finance leases and other unsecured obligations and liabilities. The fair values of these financial instruments approximated their carrying values in our condensed consolidated financial statements as of such dates, except as follows:

	As of September 30, 2020				As of December 31, 2019
Description	Carrying Amount (1)		Estimated Fair Value		Carrying Amount (1)		Estimated Fair Value
Senior unsecured notes	$	2,606,550	$	2,558,483	$	1,820,681	$	1,890,386
Secured debts(2) (3)	692,385		705,503		697,729		697,142
	$	3,298,935	$	3,263,986	$	2,518,410	$	2,587,528

(1)Includes unamortized debt issuance costs, premiums and discounts.

(2)We assumed certain of these secured debts in connection with our acquisition of certain properties. We recorded the assumed mortgage notes at estimated fair value on the date of acquisition and we are amortizing the fair value adjustments, if any, to interest expense over the respective terms of the mortgage notes to adjust interest expense to the estimated market interest rates as of the date of acquisition.

(3)Includes $3,015 of principal mortgage obligations and $25 of unamortized debt issuance costs for properties classified as held for sale as of December 31, 2019. These debts are included in liabilities of properties held for sale in our condensed consolidated balance sheet as of December 31, 2019.

We estimated the fair value of our two issuances of senior unsecured notes due 2042 and 2046 based on the closing price on Nasdaq (Level 1 input) as of September 30, 2020. We estimated the fair values of our four issuances of senior unsecured notes due 2021, 2024, 2025 and 2028 using an average of the bid and ask price on Nasdaq on or about September 30, 2020 (Level 2 inputs as defined in the fair value hierarchy under GAAP). We estimated the fair values of our secured debts by using discounted cash flows analyses and currently prevailing market terms as of the measurement date (Level 3 inputs as defined in the fair value hierarchy under GAAP). Because Level 3 inputs are unobservable, our estimated fair values may differ materially from the actual fair values.

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DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

Realized and unrealized gains and losses for our equity securities for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Realized gains and losses on equity securities sold (1)	$	—	$	—	$	—	$	(41,436)
Unrealized gains and losses on equity securities held	12,510		40		14,541		(40)
Gains and losses on equity securities, net	$	12,510	$	40	$	14,541	$	(41,476)

(1)This amount relates to our sale of our former investment in The RMR Group Inc., or RMR Inc., on July 1, 2019. For further information about our former investment in RMR Inc. see our Annual Report.

Note 7. Noncontrolling Interest

We have a joint venture arrangement with an institutional investor for one of our life science properties located in Boston, Massachusetts. The investor owns a 45% equity interest in the joint venture, and we own the remaining 55% equity interest in the joint venture. We continue to control this property and therefore continue to account for this property on a consolidated basis in our condensed consolidated financial statements under the VIE model. The portion of the joint venture's net income and comprehensive income not attributable to us, or $1,100 and $1,444 for the three months ended September 30, 2020 and 2019, respectively, and $3,838 and $4,279 for the nine months ended September 30, 2020 and 2019, respectively, is reported as a noncontrolling interest in our condensed consolidated statements of comprehensive income (loss). The joint venture made aggregate cash distributions to the other joint venture investor of $5,324 and $5,107 for the three months ended September 30, 2020 and 2019, respectively, and $16,707 and $16,294 for the nine months ended September 30, 2020 and 2019, respectively, which are reflected as a decrease in total equity attributable to noncontrolling interest in our condensed consolidated balance sheets. As of September 30, 2020, this joint venture held real estate assets with an aggregate net book value of $710,001, subject to mortgage notes of $620,000.

In assessing whether we have a controlling interest in this joint venture arrangement and are required to consolidate the accounts of the joint venture entity, we considered the members' rights to residual gains and obligations to absorb losses, which activities most significantly impact the economic performance of the entity and which member has the power to direct those activities.

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DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

Note 8.  Shareholders' Equity

Common Share Awards:

During the nine months ended September 30, 2020, we awarded our common shares, valued at the closing price of our common shares on Nasdaq on the applicable award date, as follows:

Date Awarded	Number of Shares	Price per Share
May 19, 2020 (1)	60,000	$	2.94
September 17, 2020 (2)	360,000	$	3.77

(1)In accordance with our Trustee compensation arrangements, we awarded to each of our six Trustees 10,000 of our common shares.

(2)We awarded under our equity compensation plan an aggregate of 360,000 of our common shares to our officers and certain other employees of RMR LLC.

Common Share Purchases:

During the nine months ended September 30, 2020, we purchased our common shares from our officers and certain current and former officers and employees of RMR LLC in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares, valued at the closing price of our common shares on Nasdaq on the purchase dates, as follows:

Date Purchased	Number of Shares	Price per Share
January 9, 2020	1,938	$	8.10
March 13, 2020	1,500	$	3.79
June 30, 2020	1,757	$	4.43
September 21, 2020	42,180	$	3.38

Distributions:

During the nine months ended September 30, 2020, we declared and paid quarterly distributions to common shareholders as follows:

Record Date	Payment Date	Distribution Per Share		Total Distributions
January 27, 2020	February 20, 2020	$	0.15	$	35,684
April 13, 2020	May 21, 2020	$	0.01	$	2,379
July 27, 2020	August 20, 2020	$	0.01	$	2,380

On October 15, 2020, we declared a quarterly distribution payable to our common shareholders of record on October 26, 2020 in the amount of $0.01 per share, or approximately $2,382. We expect to pay this distribution on or about November 19, 2020.

As described in Note 10, pursuant to the Transaction Agreement, on January 1, 2020, Five Star issued an aggregate of 16,118,849 of its common shares, with a value of $59,801, to our shareholders of record as of December 13, 2019. We recorded this issuance as a non-cash distribution in our condensed consolidated financial statements.

Note 9.  Segment Reporting

We operate in, and report financial information for, the following two segments: Office Portfolio and senior housing operating portfolio, or SHOP. We aggregate each of these two reporting segments based on their similar operating and economic characteristics. Our Office Portfolio segment consists of medical office properties leased to medical providers and other medical related businesses, as well as life science properties leased to biotech laboratories and other similar tenants. Our

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DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

SHOP segment consists of managed senior living communities that provide short term and long term residential living and in some instances care and other services for residents where we pay fees to the operator to manage the communities for our account. In addition, prior to January 1, 2020, our SHOP segment included triple net leased senior living communities that provided short term and long term residential living and in some instances care and other services for residents and from which we received rents from Five Star. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with new management and related agreements, or collectively, the New Management Agreements, for all of our senior living communities operated by Five Star. Prior periods have been recast to reflect these reportable segments for all periods presented.

We also report “non-segment” operations, which consists of triple net leased senior living communities, which are leased to operators other than Five Star from which we receive rents, and wellness centers, which we do not consider to be sufficiently material to constitute a separate reporting segment, and any other income or expenses that are not attributable to a specific reporting segment.

	For the Three Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	94,235	$	—	$	10,003	$	104,238
Residents fees and services	—		290,101		—		290,101
Total revenues	94,235		290,101		10,003		394,339
Expenses:
Property operating expenses	33,448		282,202		—		315,650
Depreciation and amortization	32,816		31,570		2,825		67,211
General and administrative	—		—		6,988		6,988
Acquisition and certain other transaction related costs	—		—		53		53
Impairment of assets	1,334		62,868		—		64,202
Total expenses	67,598		376,640		9,866		454,104
Loss on sale of properties	(169)		(42)		—		(211)
Gains on equity securities, net	—		—		12,510		12,510
Interest and other income	—		—		134		134
Interest expense	(6,068)		(552)		(51,471)		(58,091)
Income (loss) from continuing operations before income tax expense	20,400		(87,133)		(38,690)		(105,423)
Income tax expense	—		—		(365)		(365)
Net income (loss)	20,400		(87,133)		(39,055)		(105,788)
Net income attributable to noncontrolling interest	(1,100)		—		—		(1,100)
Net income (loss) attributable to common shareholders	$	19,300	$	(87,133)	$	(39,055)	$	(106,888)

(1)Residents fees and services for the three months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

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DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

	For the Nine Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	288,515	$	—	$	32,428	$	320,943
Residents fees and services	—		926,174		—		926,174
Total revenues	288,515		926,174		32,428		1,247,117
Expenses:
Property operating expenses	97,047		837,103		—		934,150
Depreciation and amortization	97,213		98,385		8,868		204,466
General and administrative	—		—		23,132		23,132
Acquisition and certain other transaction related costs	—		—		803		803
Impairment of assets	8,090		98,521		—		106,611
Total expenses	202,350		1,034,009		32,803		1,269,162
Gain (loss) on sale of properties	2,613		(210)		—		2,403
Gains on equity securities, net	—		—		14,541		14,541
Interest and other income	—		7,346		662		8,008
Interest expense	(18,140)		(1,676)		(123,899)		(143,715)
Gain on lease termination	—		—		22,896		22,896
Loss on early extinguishment of debt	(401)		—		(26)		(427)
Income (loss) from continuing operations before income tax expense	70,237		(102,375)		(86,201)		(118,339)
Income tax expense	—		—		(1,048)		(1,048)
Net income (loss)	70,237		(102,375)		(87,249)		(119,387)
Net income attributable to noncontrolling interest	(3,838)		—		—		(3,838)
Net income (loss) attributable to common shareholders	$	66,399	$	(102,375)	$	(87,249)	$	(123,225)

(1)Residents fees and services for the nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Under the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act, the U.S. Department of Health and Human Services, or HHS, established the Provider Relief Fund. Retention and use of the funds received under the CARES Act are subject to certain terms and conditions. The terms and conditions require that the funds be utilized to compensate for lost revenues that are attributable to the COVID-19 pandemic and for eligible costs to prevent, prepare for and respond to the COVID-19 pandemic that are not covered by other sources. Further, fund recipients are required to be participating in Medicare at the time of distribution and are subject to certain other terms and conditions, including quarterly reporting requirements. In addition, fund recipients are required to have billed Medicare during 2019 and to continue to provide care after January 31, 2020 for diagnosis, testing or care for individuals with possible or actual COVID-19 cases. Any funds not used in accordance with the terms and conditions must be returned to HHS. As of September 30, 2020, we had received $15,459 in funds from the Provider Relief Fund to be used to support the operations of our managed senior living communities; we have currently determined that $7,346 of such funds meet the required terms and conditions. We have recognized $7,346 as other income with respect to our SHOP segment for the nine months ended September 30, 2020. We currently expect to return the remaining $8,113 of such funds to HHS in November 2020 unless and to the extent we determine that such funds meet the required terms and conditions and have therefore included that amount in other liabilities in our condensed consolidated financial statements as of September 30, 2020. We have applied for additional funds that may be available under the CARES Act Provider Relief Fund; however, we may not receive any additional funding.

17

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

	As of September 30, 2020
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,105,760	$	2,914,966	$	514,392	$	6,535,118

	For the Three Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	100,010	$	32,738	$	15,263	$	148,011
Residents fees and services	—		107,816		—		107,816
Total revenues	100,010		140,554		15,263		255,827
Expenses:
Property operating expenses	34,184		90,899		—		125,083
Depreciation and amortization	33,801		34,901		4,666		73,368
General and administrative	—		—		9,604		9,604
Acquisition and certain other transaction related costs	—		—		2,492		2,492
Impairment of assets	26,037		718		6,344		33,099
Total expenses	94,022		126,518		23,106		243,646
Gain on sale of properties	4,183		—		—		4,183
Gains on equity securities, net	—		—		40		40
Interest and other income	—		—		238		238
Interest expense	(6,239)		(585)		(37,993)		(44,817)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	3,932		13,451		(45,558)		(28,175)
Income tax benefit	—		—		146		146
Equity in earnings of an investee	—		—		83		83
Net income (loss)	3,932		13,451		(45,329)		(27,946)
Net income attributable to noncontrolling interest	(1,444)		—		—		(1,444)
Net income (loss) attributable to common shareholders	$	2,488	$	13,451	$	(45,329)	$	(29,390)

18

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

	For the Nine Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	307,616	$	105,451	$	46,282	$	459,349
Residents fees and services	—		324,767		—		324,767
Total revenues	307,616		430,218		46,282		784,116
Expenses:
Property operating expenses	98,886		263,612		—		362,498
Depreciation and amortization	104,939		100,080		14,503		219,522
General and administrative	—		—		28,287		28,287
Acquisition and certain other transaction related costs	—		—		11,209		11,209
Impairment of assets	26,133		9,041		6,344		41,518
Total expenses	229,958		372,733		60,343		663,034
Gain on sale of properties	6,686		15,207		—		21,893
Dividend income	—		—		1,846		1,846
Losses on equity securities, net	—		—		(41,476)		(41,476)
Interest and other income	—		—		590		590
Interest expense	(18,257)		(2,481)		(116,102)		(136,840)
Loss on early extinguishment of debt	—		(17)		—		(17)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	66,087		70,194		(169,203)		(32,922)
Income tax benefit	—		—		47		47
Equity in earnings of an investee	—		—		617		617
Net income (loss)	66,087		70,194		(168,539)		(32,258)
Net income attributable to noncontrolling interest	(4,279)		—		—		(4,279)
Net income (loss) attributable to common shareholders	$	61,808	$	70,194	$	(168,539)	$	(36,537)

	As of December 31, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,165,577	$	3,044,989	$	443,260	$	6,653,826

Note 10. Leases and Management Agreements with Five Star

As of December 31, 2019, we leased 166 senior living communities to Five Star. As of that date, we also leased to our taxable REIT subsidiaries, or TRSs, 78 communities that we owned and that were managed by Five Star for our account.

Restructuring of our Business Arrangements with Five Star

The Transaction Agreement with Five Star. Pursuant to the Transaction Agreement, effective January 1, 2020, or the Conversion Time:

•our previously existing master leases with Five Star for all of our senior living communities that Five Star leased, as well as our previously existing management agreements and pooling agreements with Five Star for our senior living communities that Five Star managed, were terminated and replaced, or the Conversion, with the New Management Agreements;

19

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

•Five Star issued to us 10,268,158 Five Star common shares and an aggregate of 16,118,849 Five Star common shares to our shareholders of record as of December 13, 2019; and

•as consideration for these share issuances, we provided Five Star with $75,000 of additional consideration by assuming certain of Five Star's working capital liabilities and through cash payments, resulting in a gain on lease termination of $22,896 for the nine months ended September 30, 2020 in our condensed consolidated statements of comprehensive income (loss).

Also pursuant to the Transaction Agreement: (1) commencing February 1, 2019, the aggregate amount of monthly minimum rent payable to us by Five Star under our previously existing master leases with Five Star was set at $11,000 as of February 1, 2019, subject to adjustment, and subsequently reduced in accordance with the Transaction Agreement as a result of our subsequent sales of certain of the leased senior living communities, and no additional rent was payable to us by Five Star from such date until the Conversion Time; and (2) as of April 1, 2019, we purchased from Five Star $49,155 of unencumbered Qualifying PP&E (as defined in the Transaction Agreement) related to our senior living communities leased and operated by Five Star.

Pursuant to the New Management Agreements, Five Star receives a management fee equal to 5% of the gross revenues realized at the applicable senior living communities plus reimbursement for its direct costs and expenses related to such communities, as well as an annual incentive fee equal to 15% of the amount by which the annual earnings before interest, taxes, depreciation and amortization, or EBITDA, of all communities on a combined basis exceeds the target EBITDA for all communities on a combined basis for such calendar year, provided that in no event shall the incentive fee be greater than 1.5% of the gross revenues realized at all communities on a combined basis for such calendar year.

The New Management Agreements expire in 2034, subject to Five Star's right to extend for two consecutive five year terms if Five Star achieves certain performance targets for the combined managed communities portfolio, unless earlier terminated. The New Management Agreements also provide us with the right to terminate the New Management Agreement for any community that does not earn 90% of the target EBITDA for such community for two consecutive calendar years or in any two of three consecutive calendar years, with the measurement period commencing January 1, 2021 (and the first termination not possible until the beginning of calendar year 2023), provided we may not in any calendar year terminate communities representing more than 20% of the combined revenues for all communities for the calendar year prior to such termination. Pursuant to a guaranty agreement dated as of January 1, 2020 made by Five Star in favor of our applicable subsidiaries, Five Star has guaranteed the payment and performance of each of its applicable subsidiary's obligations under the applicable New Management Agreements.

On April 1, 2019, we concluded that the Restructuring Transaction constituted a reconsideration event requiring us to assess whether we held a controlling financial interest in Five Star. As a result of this assessment, we determined that Five Star was a VIE effective as of the date of the Transaction Agreement. We determined not to consolidate Five Star in our condensed consolidated financial statements, as we do not have the power to direct the activities of Five Star that most significantly impact Five Star's economic performance and therefore are not the primary beneficiary of Five Star. Effective January 1, 2020, we determined that Five Star is not a VIE and we will account for our 33.9% investment in Five Star using the equity method of accounting because we are deemed to exert significant influence, but not control, over Five Star's most significant activities. We have elected to use the fair value option to account for our investment in Five Star.

Our Senior Living Communities Formerly Leased by Five Star. Prior to the Conversion Time, we leased senior living communities to Five Star pursuant to five master leases with Five Star, each of which was terminated as of January 1, 2020 pursuant to the Transaction Agreement.

Under our previously existing leases with Five Star, Five Star paid us annual rent plus percentage rent equal to 4.0% of the increase in gross revenues at certain of our senior living communities over base year gross revenues as specified in the applicable leases. We recognized rental income payable by Five Star of $32,738 and $105,451 for the three and nine months ended September 30, 2019, respectively. Rental income for the nine months ended September 30, 2019 includes $538 of percentage rent payments we received from Five Star. Rental income from Five Star represented 12.8% and 13.4% of our total revenues for the three and nine months ended September 30, 2019, respectively, and the properties Five Star leased from us represented 27.0%, excluding properties held for sale, of our real estate investments, at cost, as of September 30, 2019. Pursuant to the Transaction Agreement, commencing February 1, 2019, no percentage rent was payable to us by Five Star and annual

20

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

rent payable to us by Five Star was adjusted as noted above. We previously determined percentage rent due under these leases annually and recognized it when all contingencies were met, which was typically at year end.

Our previously existing leases with Five Star were “triple net” leases, which generally required Five Star to pay rent and all property operating expenses, to indemnify us from liability which may arise by reason of our ownership of the properties, to maintain the properties at Five Star's expense, to remove and dispose of hazardous substances on the properties in compliance with applicable law and to maintain insurance on the properties for Five Star's and our benefit.

For the nine months ended September 30, 2019, we funded $97,480 of improvements to communities leased to Five Star, including $49,155 of fixed assets and improvements that we purchased pursuant to the Transaction Agreement as discussed above. Also pursuant to the Transaction Agreement, Five Star's rent did not increase as a result of these purchases.

Our Senior Living Communities Managed by Five Star. Five Star managed 239 and 77 senior living communities for our account as of September 30, 2020 and 2019, respectively. We lease our senior living communities that are managed by Five Star to our TRSs, and Five Star manages these communities pursuant to long term management agreements. As described above, pursuant to the Transaction Agreement, effective January 1, 2020, we replaced our long term management and pooling agreements with Five Star with the New Management Agreements, the terms of which are described above.

We incurred management fees payable to Five Star of $15,182 and $3,832 for the three months ended September 30, 2020 and 2019, respectively, and $47,937 and $11,492 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements.

The following table presents residents fees and services revenue disaggregated by type of contract and payer:

	Three Months Ended September 30,				Nine Months Ended September 30,
Revenue from contracts with customers:	2020		2019		2020		2019
Basic housing and support services	$	208,941	$	88,623	$	659,240	$	265,117
Medicare and Medicaid programs	38,882		6,902		131,460		23,333
Private pay and other third party payer SNF services	42,278		12,291		135,474		36,317
Total residents fees and services	$	290,101	$	107,816	$	926,174	$	324,767

In addition to providing management services to us, Five Star also provides certain other services to residents at some of the senior living communities it manages for us, such as rehabilitation services. At senior living communities Five Star manages for us where Five Star provides rehabilitation services on an outpatient basis, the residents, third party payers or government programs pay Five Star for those rehabilitation services. At senior living communities Five Star manages for us where Five Star provides both inpatient and outpatient rehabilitation services, we generally pay Five Star for those rehabilitation services and charges for these services are included in amounts charged to residents, third party payers or government programs. We incurred fees of $5,972 and $1,478 for the three months ended September 30, 2020 and 2019, respectively, and $19,843 and $4,666 for the nine months ended September 30, 2020 and 2019, respectively, with respect to rehabilitation services Five Star provided at senior living communities it manages for us that are payable by us. These amounts are included in property operating expenses in our condensed consolidated statements of comprehensive income (loss).

As a result of routine monitoring protocols that are a part of Five Star's compliance program activities related to Medicare billing, Five Star discovered potentially inadequate documentation at a skilled nursing facility at one of our senior living communities that Five Star manages. This monitoring was not initiated in response to any specific complaint or allegation but rather was of the type that Five Star periodically undertakes to test its compliance with applicable Medicare billing rules. As a result of this discovery, we and Five Star made an initial voluntary disclosure to the United States Department of Health and Human Services, Office of the Inspector General, or the OIG, pursuant to the OIG’s Provider Self-Disclosure Protocol. Five Star has since completed its review and assessment of these matters and we and Five Star will submit a final supplemental disclosure to the OIG in November 2020. At September 30, 2020, we had accrued a revenue reserve of $4,005 for historical Medicare payments we received that we expect to repay as a result of the inadequate documentation Five Star identified. In addition, we have recorded expenses for additional costs incurred or expected to be incurred, including OIG-imposed penalties,

21

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

as a result of this matter totaling $2,167 for the three and nine months ended September 30, 2020, of which the entire $2,167 remained accrued and not paid at September 30, 2020.

Since January 1, 2020, we sold certain senior living communities that were then managed by Five Star. We and Five Star terminated our management agreements for these senior living communities in connection with these sales. We have also identified additional senior living communities for sale that are currently managed by Five Star. If these sales are consummated, we and Five Star will terminate the management agreements for these senior living communities. See Note 3 for further information regarding these sales. In addition, we and Five Star have determined to close and/or sell 10 of our senior living communities that Five Star manages.

We lease to Five Star space at certain of our senior living communities that Five Star manages, which it uses to provide certain inpatient and outpatient rehabilitation and wellness services. We recognized a reduction in property operating expenses of $393 and $1,175 for the three and nine months ended September 30, 2020, respectively, with respect to these leases.

Note 11. Business and Property Management Agreements with RMR LLC

We have no employees. The personnel and various services we require to operate our business are provided to us by RMR LLC. We have two agreements with RMR LLC to provide management services to us: (1) a business management agreement, which relates to our business generally; and (2) a property management agreement, which relates to the property level operations of our medical office and life science properties. We also have a subsidiary level management agreement with RMR LLC related to one of our life science properties located in Boston, Massachusetts, which we entered in connection with the joint venture arrangement for that life science property. Under that agreement, our subsidiary pays RMR LLC certain business management fees directly, which fees are credited against the business management fees payable by us to RMR LLC. See Note 12 for further information regarding our relationship, agreements and transactions with RMR LLC.

Pursuant to our business management agreement with RMR LLC, we recognized net business management fees of $5,004 and $6,616 for the three months ended September 30, 2020 and 2019, respectively, and $15,614 and $20,917 for the nine months ended September 30, 2020 and 2019, respectively. The net business management fees we recognized include $725 and $2,175 of management fees related to our subsidiary level management agreement with RMR LLC entered in connection with our joint venture arrangement for the three and nine months ended September 30, 2020 and 2019, respectively. Based on our common share total return, as defined in our business management agreement, as of each of September 30, 2020 and 2019, no estimated incentive fees are included in the net business management fees we recognized for the three or nine months ended September 30, 2020 or 2019. The actual amount of annual incentive fees for 2020, if any, will be based on our common share total return as defined in our business management agreement, for the three-year period ending December 31, 2020, and will be payable in 2021. We did not incur any incentive fee payable for the year ended December 31, 2019. We recognize business management and incentive fees in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss).

Pursuant to our property management agreement with RMR LLC, we recognized aggregate net property management and construction supervision fees of $3,477 and $3,289 for the three months ended September 30, 2020 and 2019, respectively, and $10,076 and $9,844 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements.

We are generally responsible for all our operating expenses, including certain expenses incurred or arranged by RMR LLC on our behalf. We are generally not responsible for payment of RMR LLC's employment, office or administrative expenses incurred to provide management services to us, except for the applicable employment and related expenses of RMR LLC's employees assigned to work exclusively or partly at our medical office and life science properties, our share of the wages, benefits and other related costs of RMR LLC's centralized accounting personnel, our share of RMR LLC's costs for providing internal audit services, or as otherwise agreed. Our property level operating expenses are generally incorporated into the rents charged to our tenants, including certain payroll and related costs incurred by RMR LLC. We reimbursed RMR LLC $3,571 and $3,419 for these expenses and costs for the three months ended September 30, 2020 and 2019, respectively, and $10,433 and $10,145 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in other operating expenses and general and administrative expenses, as applicable, in our condensed consolidated statements of comprehensive income (loss).

22

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

Note 12. Related Person Transactions

We have relationships and historical and continuing transactions with RMR LLC, RMR Inc., Five Star and others related to them, including other companies to which RMR LLC or its subsidiaries provide management services and some of which have trustees, directors or officers who are also our Trustees or officers. RMR Inc. is the managing member of RMR LLC. The Chair of our Board and one of our Managing Trustees, Adam Portnoy, is the sole trustee, an officer and the controlling shareholder of ABP Trust, which is the controlling shareholder of RMR Inc., a managing director and the president and chief executive officer of RMR Inc., an officer and employee of RMR LLC and the chair of the board of directors and a managing director of Five Star. Jennifer Clark, our other Managing Trustee and our Secretary, also serves as a managing director and the executive vice president, general counsel and secretary of RMR Inc., an officer and employee of RMR LLC, an officer of ABP Trust and a managing director and the secretary of Five Star, and each of our officers is also an officer and employee of RMR LLC. Some of our Independent Trustees also serve as independent trustees or independent directors of other public companies to which RMR LLC or its subsidiaries provide management services. Adam Portnoy serves as the chair of the boards of trustees or boards of directors of several of these public companies and as a managing director or managing trustee of these companies. Other officers of RMR LLC, including Ms. Clark and certain of our other officers, serve as managing trustees, managing directors or officers of certain of these companies.

Five Star. We are currently Five Star's largest stockholder. As of September 30, 2020, we owned 10,691,658 Five Star common shares, or approximately 33.9% of Five Star's outstanding common shares. Five Star manages for us most of the senior living communities we own. RMR LLC provides management services to both us and Five Star. Five Star participates in our property insurance program for the senior living communities Five Star owns and leases. The premiums Five Star pays for this coverage are allocated pursuant to a formula based on the profiles of the properties included in the program. Five Star's program cost for the policy year ending June 30, 2021 is $500. See Note 10 for further information regarding our relationships, agreements and transactions with Five Star and Note 6 for further information regarding our investment in Five Star.

As of September 30, 2020, ABP Acquisition LLC, a subsidiary of ABP Trust, the controlling shareholder of RMR Inc., together with ABP Trust, owned approximately 6.4% of Five Star's outstanding common shares. RMR LLC provides management services to both us and Five Star and Adam Portnoy is the chair of the board of directors and a managing director of Five Star. Jennifer Clark is a managing director and the secretary of Five Star. Five Star's president and chief executive officer and executive vice president, chief financial officer and treasurer are officers and employees of RMR LLC.

Our Manager, RMR LLC. We have two agreements with RMR LLC to provide management services to us. RMR LLC also leases office space from us pursuant to a lease agreement that is terminable on 30 days' notice, subject to certain conditions. See Note 11 for further information regarding our management agreements with RMR LLC.

See Note 8 for information relating to the annual share awards we made in September 2020 to our officers and certain other employees of RMR LLC and common shares we purchased from our officers and certain current and former officers and employees of RMR LLC in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares to them. We include amounts recognized as expense for share awards to RMR LLC employees in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss).

AIC. Until its dissolution in February 2020, we, ABP Trust, Five Star and four other companies to which RMR LLC provides management services owned Affiliates Insurance Company, or AIC, an Indiana insurance company, in equal amounts. Certain of our Trustees and certain directors or trustees of the other AIC shareholders served on the board of directors of AIC until its dissolution.

We and the other AIC shareholders historically participated in a combined property insurance program arranged and insured or reinsured in part by AIC. The policies under that program expired on June 30, 2019, and we and the other AIC shareholders elected not to renew the AIC property insurance program; we have instead purchased standalone property insurance coverage with unrelated third party insurance providers.

As of each of September 30, 2020 and December 31, 2019, our investment in AIC had a carrying value of $11 and $298, respectively. These amounts are included in other assets, net in our condensed consolidated balance sheets. In June 2020, we received an additional liquidating distribution of approximately $287 from AIC in connection with its dissolution. We did not recognize any income related to our investment in AIC for the three and nine months ended September 30, 2020 and recognized

23

DIVERSIFIED HEALTHCARE TRUST

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

(dollar amounts in thousands, except per share data or as otherwise stated)

$83 and $617 related to our investment in AIC for the three and nine months ended September 30, 2019, respectively. These amounts are presented as equity in earnings of an investee in our condensed consolidated statements of comprehensive income (loss). Our other comprehensive income (loss) included our proportionate share of unrealized gains (losses) on securities that were owned by AIC, related to our investment in AIC.

For further information about these and other such relationships and certain other related person transactions, see our Annual Report.

Note 13.  Income Taxes

We have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, and, as such, are generally not subject to federal and most state income taxation on our operating income provided we distribute our taxable income to our shareholders and meet certain organization and operating requirements. We do, however, lease our managed senior living communities to our wholly owned TRSs that, unlike most of our subsidiaries, file a separate consolidated federal corporate income tax return and are subject to federal and state income taxes. Our consolidated income tax provision includes the income tax provision related to the operations of our TRSs and certain state income taxes we incur despite our taxation as a REIT. During the three months ended September 30, 2020 and 2019, we recognized income tax expense of $365 and benefit of $146, respectively, and during the nine months ended September 30, 2020 and 2019, we recognized income tax expense of $1,048 and benefit of $47, respectively.

Note 14. Weighted Average Common Shares (share amounts in thousands)

We calculate basic earnings per common share by dividing net income (loss) by the weighted average number of our common shares outstanding during the period. We calculate diluted earnings per share using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, and the related impact on earnings, are considered when calculating diluted earnings per share. For the three months ended September 30, 2020 and 2019, 237 and 42 unvested common shares, respectively, and for the nine months ended September 30, 2020 and 2019, 235 and 26 unvested common shares, respectively, were not included in the calculation of diluted earnings per share because to do so would have been antidilutive.

24

Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion should be read in conjunction with our condensed consolidated financial statements and notes thereto included in this Quarterly Report on Form 10-Q and with our Annual Report.

Impact of COVID-19

In March 2020, the World Health Organization declared the outbreak of COVID-19 as a pandemic and, in response to the outbreak, the U.S. Health and Human Services Secretary declared a public health emergency in the United States and many states and municipalities declared public health emergencies. The virus that causes COVID-19 has continued to spread throughout the United States and the world. Various governmental and market responses attempting to contain and mitigate the spread of the virus have negatively impacted, and continue to negatively impact, the global economy, including the U.S. economy. As a result, most market observers believe the global economy and the U.S. economy are in a recession. States and municipalities across the United States have generally allowed most businesses to re-open and have generally eased certain restrictions they had previously implemented in response to the COVID-19 pandemic, often in stages that are phased in over time, although some states and municipalities have imposed or re-imposed certain restrictions in response to increases in COVID-19 infections experienced since then. Recently, economic data have indicated that the U.S. economy has increasingly improved since the lowest periods experienced in March and April 2020, although the U.S. gross domestic product remains below pre-pandemic levels. It is unclear whether the increases in the number of COVID-19 infections will continue or amplify in the United States or elsewhere and, if so, what the impact of that would be on human health and safety, the economy, our manager and tenants or our business.

Our business is focused on healthcare related properties, including medical office and life science properties, senior living communities, wellness centers and other medical and healthcare related properties. We believe that the healthcare sector and many of our tenants provide essential services across the United States. Due to restrictions intended to prevent the spread of the virus that causes COVID-19, certain of our medical office and wellness center tenants, which include physician practices that had discontinued non-essential surgeries and procedures and fitness centers, that had been ordered closed by state executive orders have experienced disruptions to their businesses. Our senior living community operators have also experienced disruptions, including limitations on in-person tours and new admissions, and are experiencing challenges in attracting new residents to their communities in addition to experiencing increased expenses due to increased labor costs, including higher health benefits costs, and increased costs and consumption of supplies, including personal protective equipment. There will be lasting impacts of the COVID-19 pandemic, even as states and municipalities have eased and may further ease restrictions. Our tenants and their businesses may become increasingly negatively impacted, which may result in our tenants seeking assistance from us regarding their rent obligations owed to us, their being unable or unwilling to pay us rent, their ceasing to pay us rent and their ceasing to continue as going concerns. We expect that our senior living community operators will be operating our communities at lower average occupancy with higher operating expenses, which will likely lead to decreased returns to us as a result of this pandemic. As of October 31, 2020, we have been notified that 1.0% of residents in our senior living communities have active COVID-19 cases. Our operators continue to follow federal, state and local health department guidelines and their own infection prevention protocols but we expect to see additional cases of COVID-19 in our senior living communities.

We are closely monitoring the impact of the COVID-19 pandemic on all aspects of our business, including:

•our tenants and their ability to withstand the current economic conditions and continue to pay us rent;

•our senior living community operators' ability to operate our communities, mitigate and contain the spread of the virus that causes COVID-19 at our communities and to keep the residents and our operators' employees at our communities safe and healthy;

•our operations, liquidity and capital needs and resources;

•conducting financial modeling and sensitivity analyses;

•actively communicating with our tenants, our operators and other key constituents and stakeholders in order to help assess market conditions, opportunities, best practices and mitigate risks and potential adverse impacts; and

•monitoring, with the assistance of counsel and other specialists, possible government relief funding sources and other programs that may be available to us, our tenants, or our operators to enable us and them to operate through the current economic conditions and enhance our tenants' ability to pay us rent or our operators' ability to operate our communities.

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We believe that our current financial position and recent financing activities will enable us to withstand the COVID-19 pandemic and its aftermath due in part to the following:

•On June 2, 2020, we issued $1.0 billion aggregate principal amount of our 9.75% senior notes due 2025. We used the net proceeds from this offering to prepay in full our $250.0 million unsecured term loan that was scheduled to mature on June 12, 2020 and to reduce amounts outstanding under our revolving credit facility;

•Beginning in the second quarter of 2020, we reduced our quarterly cash distribution rate on our common shares to $0.01 per share, conserving approximately $33.3 million of cash per calendar quarter compared to our prior quarterly distribution rate;

•As of November 2, 2020, we had $1.0 billion of availability under our revolving credit facility; and

•Our next debt maturity does not occur until our $300.0 million senior unsecured notes mature in December 2021.

In light of the above actions, resources, expectations and conditions, we believe that we are well positioned to weather the present disruptions facing the real estate industry and, in particular, the real estate healthcare industry, including senior living. However, as a result of the COVID-19 pandemic, some of our tenants have requested relief from their obligations to pay rent due to us. While the number and value of these monthly requests have been declining, we continue to evaluate these requests as they are made on a tenant-by-tenant basis. As of November 2, 2020, we granted requests to 74 of our tenants to defer rent payments totaling $2.2 million with respect to leases that represent, as of September 30, 2020, approximately 5.3% of our annualized rental income. Those 74 of our tenants consist of 73 tenants in our Office Portfolio segment, which accounted for $1.8 million of deferrals, and one triple net senior living tenant. As of September 30, 2020, we recognized an increase in our accounts receivable balance related to these deferred rent payments of $4.5 million. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. For the three months ended September 30, 2020, we collected approximately 99% of our contractual rents due from tenants in our Office Portfolio segment. These deferred amounts did not negatively impact our results for the three and nine months ended September 30, 2020. However, the deferred rents have temporarily reduced our operating cash flows.

We do not have any employees and the personnel and various services we require to operate our business are provided to us by RMR LLC pursuant to our business and property management agreements with RMR LLC for our Office Portfolio. RMR LLC has implemented enhanced cleaning protocols and social distancing guidelines at its corporate headquarters and regional offices, as well as business continuity plans to ensure that RMR LLC employees remain safe and able to support us and other companies managed by RMR LLC or its subsidiaries, including providing appropriate information technology such as notebook computers, smart phones, computer applications, information technology security applications and technology support.

With respect to our properties where property management is provided by RMR LLC, all RMR LLC property management and engineering personnel have been trained on COVID-19 precaution procedures. As states and local communities across the United States moved to stay at home orders, RMR LLC worked to reduce and optimize our operating costs at our properties by:

•deferring non-emergency work;

•implementing energy reduction protocols for lighting and HVAC systems;

•reducing non-essential building services and staff; and

•reducing the frequency of trash removal.

RMR LLC’s property management teams have also established business continuity plans to ensure operational stability at our properties. RMR LLC regional management offices limit walk-in visitors and maintain maximum office occupancy limits as required by state and local guidelines, including weekly rotations of employees as needed.

As stay at home orders were and may be lifted or loosened across the United States, RMR LLC has implemented additional procedures at our properties based on recommended guidelines from the U.S. Centers for Disease Control and Prevention and other regulatory agencies. For example:

•focusing on sanitizing high touch points in common areas and restrooms;

•shutting down certain building amenities;

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•prudently managing the execution or deferment of tenant work orders to limit RMR LLC staff and tenant interactions at our properties;

•installing signage throughout our properties with social distancing reminders;

•changing certain building HVAC systems and equipment, including adjusting outdoor air control programs to increase the amount of outside air delivered to interior spaces and to adjust control sequences to maintain space relative humidity in order to help minimize the concentration of the virus;

•flushing domestic water systems to prepare for re-occupancy;

•performing service calls and preventative maintenance after business hours to limit social interactions;

•requiring vendors to follow best practices under COVID-19 pandemic conditions, including providing RMR LLC with documented preventative measures for their employees and requiring staff to wear appropriate personal protective equipment when working at our properties; and

•altering cleaning schedules to perform vacuuming at times intended to reduce the potential airborne spread of the virus.

RMR LLC has significantly reduced non-essential work travel and its regional leadership personnel have not been allowed to work in the same locations at the same time. RMR LLC also requires its employees who work at our properties to use personal protective equipment and business continuity bonus payments have been provided by RMR LLC to certain essential workers at our properties.

With respect to our SHOP segment, Five Star has taken a number of proactive measures to protect the health and safety of their staff and our residents and patients, including:

•restricting access to our senior living communities to essential visitors and team members and only reopening communities when it is determined safe to do so in accordance with applicable federal, state and local regulations and guidelines, and Five Star's internal criteria;

•enhancing infectious disease prevention and control policies, procedures and protocols;

•providing additional and enhanced training to team members at all levels of the organization;

•working with vendors to provide adequate supplies and personal protective equipment to our senior living communities; and

•effectively transitioning to virtual sales and marketing activities and thoughtfully proceeding with resident move-ins, when appropriate.

We also believe that we, Five Star and our impacted tenants may benefit from provisions of the CARES Act, signed into law in March 2020, or other federal or state relief programs allowing them to continue or resume business activity. During the nine months ended September 30, 2020, we recognized other income of $7.3 million related to funds received under the CARES Act.

There are extensive uncertainties surrounding the COVID-19 pandemic and its aftermath. These uncertainties include, among others:

•the duration and severity of the negative economic impact;

•the strength and sustainability of any economic recovery;

•the timing and process for how federal, state and local governments and other market participants may oversee and conduct the return of economic activity when the COVID-19 pandemic abates, such as what continuing restrictions and protective measures may remain in place or be added and what restrictions and protective measures may be lifted or reduced in order to foster a return of increased economic activity in the United States; and

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•the responses of governments, businesses and the general public to any increased level or rates of COVID-19 infections.

As a result of these uncertainties, we are unable to determine what the ultimate impact will be on our, our tenants', our operators' and other stakeholders' businesses, operations, financial results and financial position. For further information and risks relating to the COVID-19 pandemic and its aftermath on us and our business, see Part II, Item 1A, “Risk Factors” of this Quarterly Report on Form 10-Q.

OVERVIEW

We are a REIT organized under Maryland law and own medical office and life science properties, senior living communities and other healthcare related properties throughout the United States. As of September 30, 2020, we owned 407 properties, including 22 properties classified as held for sale and 10 properties scheduled for closure and/or sale, located in 37 states and Washington, D.C., including one life science property owned in a joint venture arrangement in which we own a 55% equity interest. At September 30, 2020, the gross book value of our real estate assets at cost plus certain acquisition costs, before depreciation and purchase price allocations and less impairment write downs, was $8.2 billion, including $172.1 million of gross book value classified as held for sale in our condensed consolidated balance sheet. For the three months ended September 30, 2020, substantially all of our net operating income, or NOI, came from properties where a majority of the revenues are derived from our tenants' and residents' private resources.

RESTRUCTURING OF BUSINESS ARRANGEMENTS WITH FIVE STAR

As of December 31, 2019, Five Star operated 244 of our senior living communities in our SHOP segment, of which 166 communities were leased to Five Star and 78 communities were managed by Five Star for our account. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with the New Management Agreements for all of our senior living communities operated by Five Star. The Conversion was a significant change in our historical arrangements with Five Star and has resulted, and likely will continue to result in future periods, in our realizing significantly different operating results from our senior living communities, including increased variability. As of September 30, 2020, Five Star managed 239 senior living communities for our account.

For further information regarding the Restructuring Transaction, the Transaction Agreement and our other business arrangements with Five Star, see Notes 10 and 12 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

PORTFOLIO OVERVIEW

The following tables present an overview of our portfolio (dollars in thousands, except investment per square foot or unit data):

(As of September 30, 2020)	Number of Properties	Square Feet or Number of Units		Gross Book Value of Real Estate Assets(1)		% of Total Gross Book Value of Real Estate Assets		Investment per Square Foot or Unit(2)		Q3 2020 Revenues(3)		% of Q3 2020 Revenues		Q3 2020 NOI (3)(4)		% of Q3 2020 NOI
Office Portfolio (5)	126	11,572,503	sq. ft.	$	3,749,460	45.5	%	$	324	$	94,235	23.9	%	$	60,787	77.2	%
SHOP (6) (7)	239	28,232	units	4,014,777		48.7	%	$	142,207	290,101		73.6	%	7,899		10.0	%
Other triple net leased senior living communities	32	2,605	units	296,337		3.6	%	$	113,757	7,114		1.8	%	7,114		9.0	%
Wellness centers	10	812,000	sq. ft.	178,110		2.2	%	$	219	2,889		0.7	%	2,889		3.8	%
Total	407			$	8,238,684	100.0	%			$	394,339	100.0	%	$	78,689	100.0	%

	Occupancy
	As of and For the Twelve Months Ended September 30,
	2020		2019
Office Portfolio (8)	91.3	%	92.3	%
SHOP (6)	80.0	%	84.6	%
Other triple net leased senior living communities (9)(10)	85.4	%	87.2	%
Wellness centers	100.0	%	100.0	%

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(1)Represents gross book value of real estate assets at cost plus certain acquisition costs, before depreciation and purchase price allocations and less impairment write downs, if any. Amounts include $172,126 of gross book value of 22 properties classified as held for sale as of September 30, 2020, which amounts are included in assets of properties held for sale in our condensed consolidated balance sheet.

(2)Represents gross book value of real estate assets divided by number of rentable square feet or living units, as applicable, at September 30, 2020.

(3)Includes $551 of revenues and $(215) of NOI from properties that we sold and $19,434 of revenues and $904 of NOI from properties classified as held for sale in our condensed consolidated balance sheet as of September 30, 2020.

(4)We calculate our NOI on a consolidated basis and by reportable segment. Our definition of NOI and our reconciliation of net income (loss) to NOI are included below under the heading “Non-GAAP Financial Measures.”

(5)Our medical office and life science property leases include some triple net leases where, in addition to paying fixed rents, the tenants assume the obligation to operate and maintain the properties at their expense, and some net and modified gross leases where we are responsible for the operation and maintenance of the properties and we charge tenants for some or all of the property operating costs. A small percentage of our medical office and life science property leases are full-service leases where we receive fixed rent from our tenants and no reimbursement for our property operating costs.

(6)Includes 920 units for communities scheduled for closure and/or sale.

(7)Residents fees and services for the three and nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three and nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

(8)Medical office and life science property occupancy data is as of September 30, 2020 and 2019 and includes (i) out of service assets undergoing redevelopment, (ii) space which is leased but is not occupied or is being offered for sublease by tenants and (iii) space being fitted out for occupancy.

(9)Excludes data for periods prior to our ownership of certain properties, data for properties sold or classified as held for sale and data for which there was a transfer of operations during the periods presented.

(10)Operating data for other triple net leased senior living communities leased to third party operators other than Five Star and wellness centers are presented based upon the operating results provided by our tenants for the 12 months ended June 30, 2020 and 2019, or the most recent prior period for which tenant operating results are made available to us. We have not independently verified tenant operating data.

Due to the COVID-19 pandemic, we anticipate that leasing activity may remain slow in our Office Portfolio and that we may continue to be prevented from, or impeded in, pursuing or accepting additional residents at our senior living communities due to restrictions intended to prevent the spread of the virus that causes COVID-19, including restricting nonessential visitors from some of our senior living communities. As a result, we expect to experience further decreases in occupancy at our senior living communities. Further, as noted above, we expect to continue to incur higher operating costs at our senior living communities as a result of the COVID-19 pandemic. These expected declines in occupancy and increases in operating costs at our senior living communities are expected to result in further decreases in income or returns from those properties.

During the three months ended September 30, 2020, we entered into lease renewals for 135,177 square feet and new leases for 66,544 square feet at our medical office and life science properties. The weighted average annual rental rate for leases entered during the quarter was $33.21 per square foot, which was 4.12% higher than the previous weighted average annual rental rate for the same space. Weighted (by annualized rental income) average lease term for leases entered during the third quarter of 2020 was 7.0 years. Commitments for tenant improvements, leasing commission costs and concessions for leases we entered during the third quarter of 2020 totaled $5.0 million, or $24.60 per square foot on average (approximately $3.51 per square foot per year of the lease term).

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Lease Expiration Schedules

As of September 30, 2020, lease expirations at our medical office and life science properties in our Office Portfolio segment are as follows (dollars in thousands):

Year	Number of Tenants	Square Feet	Percent of Total		Cumulative Percent of Total		Annualized  Rental Income(1)		Percent of Total		Cumulative Percent of Total
2020	62	385,486	3.6	%	3.6	%	$	14,246	3.8	%	3.8	%
2021	99	855,884	8.1	%	11.7	%	29,212		7.8	%	11.6	%
2022	103	1,143,413	10.8	%	22.5	%	34,122		9.1	%	20.7	%
2023	58	1,068,905	10.1	%	32.6	%	20,856		5.6	%	26.3	%
2024	77	1,831,904	17.3	%	49.9	%	50,093		13.4	%	39.7	%
2025	78	1,201,443	11.4	%	61.3	%	26,687		7.1	%	46.8	%
2026	45	718,298	6.8	%	68.1	%	21,774		5.8	%	52.6	%
2027	28	476,458	4.5	%	72.6	%	11,826		3.2	%	55.8	%
2028	19	1,444,954	13.7	%	86.3	%	115,003		30.7	%	86.5	%
2029 and thereafter	67	1,434,989	13.7	%	100.0	%	50,919		13.5	%	100.0	%
Total	636	10,561,734	100.0	%			$	374,738	100.0	%
Weighted average remaining lease term (in years)		5.2					6.0

(1)Annualized rental income is based on rents pursuant to existing leases as of September 30, 2020, including straight line rent adjustments, estimated recurring expense reimbursements for certain net and modified gross leases and excluding lease value amortization at certain of our medical office and life science properties. Annualized rental income also includes 100% of rental income as reported under GAAP from our life science property owned in a joint venture arrangement in which we own a 55% equity interest.

Lease expiration data for our other triple net leased senior living communities leased to third party operators and wellness centers has not been provided because there were no changes to the lease expiration schedules from those reported in our Annual Report, except for (i) the renewal of a lease for four of our wellness centers for a 12 year term, expiring in August 2040, and (ii) the sale of three senior living communities. As a result of the COVID-19 pandemic's impact on operations at our wellness centers, we are evaluating our options with respect to the tenant of six of our wellness centers with total annualized rental income of approximately $7.9 million and, which tenant was in default under the applicable leases with us as of September 30, 2020.

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RESULTS OF OPERATIONS (dollars and square feet in thousands, unless otherwise noted)

We operate in, and report financial information for, the following two segments: Office Portfolio and SHOP. We aggregate each of these two reporting segments based on their similar operating and economic characteristics. Our Office Portfolio segment consists of medical office properties leased to medical providers and other medical related businesses, as well as life science properties leased to biotech laboratories and other similar tenants. Our SHOP segment consists of managed senior living communities that provide short term and long term residential living and in some instances care and other services for residents where we pay fees to the operator to manage the communities for our account. In addition, prior to January 1, 2020, our SHOP segment included triple net leased senior living communities that provided short term and long term residential living and in some instances care and other services for residents and from which we received rents from Five Star. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with the New Management Agreements for all of our senior living communities operated by Five Star. Prior periods have been recast to reflect these reportable segments for all periods presented.

We also report “non-segment” operations, which consists of triple net leased senior living communities that are leased to operators other than Five Star from which we receive rents and wellness centers, which we do not consider to be sufficiently material to constitute a separate reporting segment, and any other income or expenses that are not attributable to a specific reporting segment.

The following table summarizes the results of operations of each of our segments for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Revenues:
Office Portfolio	$	94,235	$	100,010	$	288,515	$	307,616
SHOP (1)	290,101		140,554		926,174		430,218
Non-Segment	10,003		15,263		32,428		46,282
Total revenues	$	394,339	$	255,827	$	1,247,117	$	784,116
Net income (loss) attributable to common shareholders:
Office Portfolio	$	19,300	$	2,488	$	66,399	$	61,808
SHOP (1)	(87,133)		13,451		(102,375)		70,194
Non-Segment	(39,055)		(45,329)		(87,249)		(168,539)
Net income (loss) attributable to common shareholders	$	(106,888)	$	(29,390)	$	(123,225)	$	(36,537)

(1)Residents fees and services for the three and nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three and nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

The following sections analyze and discuss the results of operations of each of our segments for the periods presented.

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Three Months Ended September 30, 2020 Compared to Three Months Ended September 30, 2019 (dollars in thousands, except average monthly rate):

Unless otherwise indicated, references in this section to changes or comparisons of results, income or expenses refer to comparisons of the results for the three months ended September 30, 2020 to the three months ended September 30, 2019. Our definition of NOI and our reconciliation of net income (loss) to NOI and a description of why we believe NOI is an appropriate supplemental measure are included below under the heading “Non-GAAP Financial Measures.”

	Three Months Ended September 30,
	2020		2019		$ Change		% Change
NOI by segment:
Office Portfolio	$	60,787	$	65,826	$	(5,039)	(7.7)	%
SHOP (1)	7,899		49,655		(41,756)		(84.1)	%
Non-Segment	10,003		15,263		(5,260)		(34.5)	%
Total NOI	78,689		130,744		(52,055)		(39.8)	%
Depreciation and amortization	67,211		73,368		(6,157)		(8.4)	%
General and administrative	6,988		9,604		(2,616)		(27.2)	%
Acquisition and certain other transaction related costs	53		2,492		(2,439)		(97.9)	%
Impairment of assets	64,202		33,099		31,103		94.0	%
(Loss) gain on sale of properties	(211)		4,183		4,394		105.0	%
Gains on equity securities, net	12,510		40		12,470		nm
Interest and other income	134		238		(104)		(43.7)	%
Interest expense	(58,091)		(44,817)		13,274		29.6	%
Loss from continuing operations before income tax (expense) benefit and equity in earnings of an investee	(105,423)		(28,175)		77,248		274.2	%
Income tax (expense) benefit	(365)		146		511		nm
Equity in earnings of an investee	—		83		(83)		(100.0)	%
Net loss	(105,788)		(27,946)		77,842		278.5	%
Net income attributable to noncontrolling interest	(1,100)		(1,444)		(344)		(23.8)	%
Net loss attributable to common shareholders	$	(106,888)	$	(29,390)	$	77,498	263.7	%

    nm - not meaningful

(1)Residents fees and services for the three months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Office Portfolio:

	Comparable Properties (1)				All Properties
	As of September 30,				As of September 30,
	2020		2019		2020		2019
Total buildings	116		116		126		140
Total square feet (2)	10,923		10,923		11,573		12,179
Occupancy (3)	93.3	%	93.7	%	91.3	%	92.3	%

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since July 1, 2019, including our life science property owned in a joint venture arrangement in which we own a 55% equity interest; excludes properties classified as held for sale or out of service undergoing redevelopment, if any.

(2)Prior periods exclude space remeasurements made subsequent to those periods.

(3)Medical office and life science property occupancy includes (i) out of service assets undergoing redevelopment, (ii) space which is leased but is not occupied or is being offered for sublease by tenants, and (iii) space being fitted out for occupancy. Comparable property occupancy excludes out of service assets undergoing redevelopment.

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	Three Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	90,736	$	92,588	$	(1,852)	(2.0)	%	$	3,499	$	7,422	$	94,235	$	100,010	$	(5,775)	(5.8)	%
Property operating expenses	(32,417)		(31,964)		453		1.4	%	(1,031)		(2,220)		(33,448)		(34,184)		(736)		(2.2)	%
NOI	$	58,319	$	60,624	$	(2,305)	(3.8)	%	$	2,468	$	5,202	$	60,787	$	65,826	$	(5,039)	(7.7)	%

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since July 1, 2019, including our life science property owned in a joint venture arrangement in which we own a 55% equity interest; excludes properties classified as held for sale or out of service undergoing redevelopment, if any.

Rental income. Rental income decreased primarily due to our disposition of 19 properties since July 1, 2019 and a decrease in rental income at our comparable properties. Rental income decreased at our comparable properties primarily due to increased bad debt and reduced parking revenue at certain of our comparable properties related to the COVID-19 pandemic, partially offset by higher average rents achieved from our new leasing activity at certain of our comparable properties.

Property operating expenses. Property operating expenses consist of real estate taxes, utility expenses, insurance, management fees, salaries and benefit costs of property level personnel, repairs and maintenance expense, cleaning expense and other direct costs of operating these properties. The decrease in property operating expenses is primarily due to our disposition of 19 properties since July 1, 2019, partially offset by an increase in property operating expenses at our comparable properties. Property operating expenses at our comparable properties increased primarily due to increases in real estate taxes and insurance expense, partially offset by decreases in utility expenses, parking expenses and other direct costs at certain of our comparable properties.

Net operating income. The change in NOI reflects the net changes in rental income and property operating expenses described above.

SHOP:

	Comparable Properties (1)						All Properties
	As of and For the Three Months						As of and For the Three Months
	Ended September 30,						Ended September 30,
	2020			2019			2020			2019
Total properties	214			214			239			243
# of units	25,656			25,656			28,232			28,844
Occupancy	76.3		%	85.4		%	75.2		%	86.0		%
Average monthly rate (2)	$	4,515		$	4,508		$	4,508		$	4,549

(1)Consists of senior living communities that we have owned and which have been operated by the same operator continuously since July 1, 2019; excludes communities classified as held for sale or scheduled for closure and/or sale, if any.

(2)Average monthly rate is calculated by taking the average daily rate, which is defined as total residents fees and services divided by occupied units during the period, and multiplying it by 30 days.

	Three Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	—	$	31,376	$	(31,376)	(100.0)	%	$	—	$	1,362	$	—	$	32,738	$	(32,738)	(100.0)	%
Residents fees and services	267,141		101,223		165,918		163.9	%	22,960		6,593		290,101		107,816		182,285		169.1	%
Property operating expenses	(252,931)		(84,182)		168,749		200.5	%	(29,271)		(6,717)		(282,202)		(90,899)		191,303		210.5	%
NOI	$	14,210	$	48,417	$	(34,207)	(70.7)	%	$	(6,311)	$	1,238	$	7,899	$	49,655	$	(41,756)	(84.1)	%

(1)Consists of senior living communities that we have owned and which have been operated by the same operator continuously since July 1, 2019; excludes communities classified as held for sale or scheduled for closure and/or sale, if any.

As a result of routine monitoring protocols that are a part of Five Star's compliance program activities related to Medicare billing, Five Star discovered potentially inadequate documentation at a skilled nursing facility at one of our senior living communities that Five Star manages. This monitoring was not initiated in response to any specific complaint or allegation but rather

33

was of the type that Five Star periodically undertakes to test its compliance with applicable Medicare billing rules. As a result of this discovery, we and Five Star made an initial voluntary disclosure to the OIG pursuant to the OIG’s Provider Self-Disclosure Protocol. Five Star has since completed its review and assessment of these matters and we and Five Star will submit a final supplemental disclosure to the OIG in November 2020. At September 30, 2020, we had accrued a revenue reserve of $4,005 for historical Medicare payments we received that we expect to repay as a result of the inadequate documentation Five Star identified. In addition, we have recorded expenses for additional costs incurred or expected to be incurred, including OIG-imposed penalties, as a result of this matter totaling $2,167 for the three and nine months ended September 30, 2020, of which the entire $2,167 remains accrued and not paid at September 30, 2020.

Rental income. Rental income decreased due to the termination of our previously existing master leases with Five Star. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with the New Management Agreements for all of our senior living communities operated by Five Star. See Note 10 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for information regarding the Restructuring Transaction.

Residents fees and services. Residents fees and services are the revenues earned at our managed senior living communities. We recognize these revenues as services are provided and related fees are accrued. Residents fees and services increased primarily due to the Restructuring Transaction and the resulting change to our management arrangement with Five Star for all of our senior living communities that it operates, our acquisition of one active adult rental property since July 1, 2019 and increased average monthly rates at our comparable properties, partially offset by decreases in occupancy primarily due to the impact of the COVID-19 pandemic at both comparable and non-comparable properties for the three months ended September 30, 2020 compared to the three months ended September 30, 2019. We expect to experience continued downward pressure on our occupancy and average monthly rates as normal resident move-outs may not be replaced by new resident move-ins and potential residents may increasingly delay or forgo moving into senior living communities as a result of the COVID-19 pandemic. Residents fees and services for the three months ended September 30, 2020 is net of a $4,005 reserve for an estimated Medicare refund we expect to pay.

Property operating expenses. Property operating expenses consist of real estate taxes, utility expenses, insurance, salaries and benefit costs of property level personnel, repairs and maintenance expense, management fees, cleaning expense and other direct costs of operating these communities. Property operating expenses increased primarily due to the Restructuring Transaction and the resulting change to our management arrangement with Five Star for all of our senior living communities that it operates, our acquisition of one active adult rental property since July 1, 2019 and increased costs associated with staffing and supplies due to the COVID-19 pandemic at both comparable and non-comparable properties for the three months ended September 30, 2020 compared to the three months ended September 30, 2019. As a result of the COVID-19 pandemic, we expect to continue experiencing higher operating expenses primarily driven by increased labor costs and increased cost and consumption of supplies, including personal protective equipment. Property operating expenses for the three months ended September 30, 2020 includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Net operating income. The change in NOI reflects the net changes in rental income, residents fees and services and property operating expenses described above.

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Non-Segment(1):

	Comparable Properties (2)				All Properties
	As of and For the Three Months Ended September 30,				As of and For the Three Months Ended September 30,
	2020		2019		2020		2019
Total properties:
Other triple net leased senior living communities	29		29		32		43
Wellness centers	10		10		10		10
Rent coverage:
Other triple net leased senior living communities (3)	1.63	x	1.76	x	1.63	x	1.76	x
Wellness centers (3)	1.59	x	2.36	x	1.59	x	2.36	x

(1)Non-segment operations consists of all of our other operations, including certain senior living communities leased to third party operators other than Five Star and wellness centers, which segment we do not consider to be sufficiently material to constitute a separate reporting segment, and any other income or expenses that are not attributable to a specific reporting segment.

(2)Comparable properties consists of properties that we have owned and which have been leased to the same operator continuously since July 1, 2019; excludes properties classified as held for sale, if any.

(3)All tenant operating data presented is based upon the operating results provided by our tenants for the 12 months ended June 30, 2020 and 2019 or the most recent prior period for which tenant operating results are available to us. Rent coverage is calculated using the operating cash flows from our triple net lease tenants' operations of our properties, before subordinated charges, if any, divided by triple net lease minimum rents payable to us. We have not independently verified tenant operating data. Excludes data for historical periods prior to our ownership of certain properties, as well as data for properties sold or classified as held for sale during the periods presented. Excludes rent coverage for our six wellness centers that are in default under the applicable leases with us.

	Three Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	9,044	$	10,788	$	(1,744)	(16.2)	%	$	959	$	4,475	$	10,003	$	15,263	$	(5,260)	(34.5)	%
NOI	$	9,044	$	10,788	$	(1,744)	(16.2)	%	$	959	$	4,475	$	10,003	$	15,263	$	(5,260)	(34.5)	%

(1)Consists of properties that we have owned and which have been leased to the same operator continuously since July 1, 2019; excludes properties classified as held for sale, if any.

Rental income. Rental income decreased primarily due to the sale of 11 senior living communities leased to private operators since July 1, 2019 and a decrease in rental income at our comparable properties, partially offset by increased rents resulting from our purchase of improvements at our comparable properties since July 1, 2019. Rental income decreased at our comparable properties primarily due to a tenant default under leases for six of our wellness centers. As a result of the COVID-19 pandemic, many of our wellness centers had been ordered closed by state or local executive orders. In April 2020, we agreed to defer rent payments for four wellness centers in the second quarter of 2020 in exchange for the tenant agreeing to pay the deferred rents in 12 equal monthly installments which commenced in September 2020. In October 2020, the lease for these four wellness centers was renewed for a 12-year term. We continue to evaluate our options for our wellness centers operated by tenants in default of their lease obligations.

Net operating income. The change in NOI reflects the net changes in rental income described above.

Consolidated:

References to changes in the income and expense categories below relate to the comparison of consolidated results for the three months ended September 30, 2020, compared to the three months ended September 30, 2019.

Depreciation and amortization expense. Depreciation and amortization expense decreased primarily due to our disposition of 50 properties, certain depreciable leasing related assets becoming fully depreciated and certain of our acquired resident agreements becoming fully amortized since July 1, 2019, partially offset by our acquisition of an active adult rental property and the purchase of capital improvements at certain of our properties since July 1, 2019.

General and administrative expense. General and administrative expense consists of fees paid to RMR LLC under our business management agreement, legal and accounting fees, fees and expenses of our Trustees, equity compensation expense and other costs relating to our status as a publicly traded company. General and administrative expense decreased primarily due to a decrease in our

35

business management fees expense as a result of lower trading prices for our common shares during the three months ended September 30, 2020 compared to the three months ended September 30, 2019.

Acquisition and certain other transaction related costs. Acquisition and certain other transaction related costs primarily represent costs incurred in connection with the Restructuring Transaction.

Impairment of assets. For further information about our asset impairment charges, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

(Loss) gain on sale of properties. (Loss) gain on sale of properties is the result of our sale of certain of our properties during the three months ended September 30, 2020 and 2019. For further information regarding (loss) gain on sale of properties, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Gains on equity securities, net. Gains on equity securities, net, represent the net unrealized gains to adjust our investment in Five Star to its fair value.

Interest and other income. Interest and other income represents interest earned on investable cash on hand and restricted cash.

Interest expense. Interest expense increased primarily due to our issuance in June 2020 of $1,000,000 aggregate principal amount of our 9.75% senior notes due in 2025. This increase was partially offset by a decrease in average borrowings under our revolving credit facility, our redemption in April 2020 of all $200,000 of our 6.75% senior notes due 2020, our prepayment in December 2019 of our $350,000 term loan, a lower interest rate, as compared to our $350,000 term loan, on our new $250,000 term loan we obtained in December 2019, which we subsequently repaid in June 2020, and decreases in LIBOR, resulting in a decrease in interest expense with respect to our floating rate debt.

Income tax (expense) benefit. Income tax (expense) benefit is the result of operating income we earned in certain jurisdictions where we are subject to state income taxes.

Equity in earnings of an investee. Equity in earnings of an investee represents our proportionate share of earnings from our investment in AIC. The decrease in equity in earnings of an investee is due to the dissolution of AIC in February 2020.

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Nine Months Ended September 30, 2020 Compared to Nine Months Ended September 30, 2019 (dollars in thousands, except average monthly rate):

Unless otherwise indicated, references in this section to changes or comparisons of results, income or expenses refer to comparisons of the results for the nine months ended September 30, 2020 to the nine months ended September 30, 2019. Our definition of NOI and our reconciliation of net income (loss) to NOI and a description of why we believe NOI is an appropriate supplemental measure are included below under the heading “Non-GAAP Financial Measures.”

	Nine Months Ended September 30,
	2020		2019		$ Change		% Change
NOI by segment:
Office Portfolio	$	191,468	$	208,730	$	(17,262)	(8.3)	%
SHOP (1)	89,071		166,606		(77,535)		(46.5)	%
Non-Segment	32,428		46,282		(13,854)		(29.9)	%
Total NOI	312,967		421,618		(108,651)		(25.8)	%
Depreciation and amortization	204,466		219,522		(15,056)		(6.9)	%
General and administrative	23,132		28,287		(5,155)		(18.2)	%
Acquisition and certain other transaction related costs	803		11,209		(10,406)		(92.8)	%
Impairment of assets	106,611		41,518		65,093		156.8	%
Gain on sale of properties	2,403		21,893		(19,490)		(89.0)	%
Dividend income	—		1,846		(1,846)		(100.0)	%
Gains and losses on equity securities, net	14,541		(41,476)		56,017		135.1	%
Interest and other income	8,008		590		7,418		nm
Interest expense	(143,715)		(136,840)		6,875		5.0	%
Gain on lease termination	22,896		—		22,896		nm
Loss on early extinguishment of debt	(427)		(17)		410		nm
Loss from continuing operations before income tax (expense) benefit and equity in earnings of an investee	(118,339)		(32,922)		85,417		259.5	%
Income tax (expense) benefit	(1,048)		47		1,095		nm
Equity in earnings of an investee	—		617		(617)		(100.0)	%
Net loss	(119,387)		(32,258)		87,129		270.1	%
Net income attributable to noncontrolling interest	(3,838)		(4,279)		(441)		(10.3)	%
Net loss attributable to common shareholders	$	(123,225)	$	(36,537)	$	86,688	237.3	%

    nm - not meaningful

(1)Residents fees and services for the nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Office Portfolio:

	Comparable Properties (1)				All Properties
	As of September 30,				As of September 30,
	2020		2019		2020		2019
Total buildings	116		116		126		140
Total square feet (2)	10,923		10,923		11,573		12,179
Occupancy (3)	93.3	%	93.7	%	91.3	%	92.3	%

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since January 1, 2019, including our life science property owned in a joint venture arrangement in which we own a 55% equity interest; excludes properties classified as held for sale or out of service undergoing redevelopment, if any.

(2)Prior periods exclude space remeasurements made subsequent to those periods.

(3)Medical office and life science property occupancy includes (i) out of service assets undergoing redevelopment, (ii) space which is leased but is not occupied or is being offered for sublease by tenants, and (iii) space being fitted out for occupancy. Comparable property occupancy excludes out of service assets undergoing redevelopment.

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	Nine Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	275,318	$	277,163	$	(1,845)	(0.7)	%	$	13,197	$	30,453	$	288,515	$	307,616	$	(19,101)	(6.2)	%
Property operating expenses	(93,373)		(92,028)		1,345		1.5	%	(3,674)		(6,858)		(97,047)		(98,886)		(1,839)		(1.9)	%
NOI	$	181,945	$	185,135	$	(3,190)	(1.7)	%	$	9,523	$	23,595	$	191,468	$	208,730	$	(17,262)	(8.3)	%

(1)Consists of medical office and life science properties that we have owned and which have been in service continuously since January 1, 2019, including our life science property owned in a joint venture arrangement in which we own a 55% equity interest; excludes properties classified as held for sale or out of service undergoing redevelopment, if any.

Rental income. Rental income decreased primarily due to our disposition of 29 properties since January 1, 2019 and a decrease in rental income at our comparable properties. Rental income decreased at our comparable properties primarily due to reduced parking revenue at certain of our comparable properties related to the COVID-19 pandemic, partially offset by increases in tax escalation income and other expense reimbursement income and higher average rents achieved from our new and renewal leasing activity at certain of our comparable properties.

Property operating expenses. The decrease in property operating expenses is primarily due to our disposition of 29 properties since January 1, 2019, partially offset by increases in property operating expenses at our comparable properties. Property operating expenses at our comparable properties increased primarily due to increases in real estate taxes and insurance expense, partially offset by decreases in utility expenses and other direct costs at certain of our comparable properties.

Net operating income. The change in NOI reflects the net changes in rental income and property operating expenses described above.

SHOP:

	Comparable Properties (1)						All Properties
	As of and For the Nine Months Ended September 30,						As of and For the Nine Months Ended September 30,
	2020			2019			2020			2019
Total properties	213			213			239			243
# of units	25,338			25,338			28,232			28,844
Occupancy	80.3		%	85.7		%	78.9		%	84.8		%
Average monthly rate (2)	$	4,546		$	4,584		$	4,526		$	4,635

(1)Consists of senior living communities that we have owned and which have been operated by the same operator continuously since January 1, 2019; excludes communities classified as held for sale or scheduled for closure and/or sale, if any.

(2)Average monthly rate is calculated by taking the average daily rate, which is defined as total residents fees and services divided by occupied units during the period, and multiplying it by 30 days.

	Nine Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	—	$	99,296	$	(99,296)	(100.0)	%	$	—	$	6,155	$	—	$	105,451	$	(105,451)	(100.0)	%
Residents fees and services	840,499		299,013		541,486		181.1	%	85,675		25,754		926,174		324,767		601,407		185.2	%
Property operating expenses	(739,580)		(238,777)		500,803		209.7	%	(97,523)		(24,835)		(837,103)		(263,612)		573,491		217.6	%
NOI	$	100,919	$	159,532	$	(58,613)	(36.7)	%	$	(11,848)	$	7,074	$	89,071	$	166,606	$	(77,535)	(46.5)	%

(1)Consists of senior living communities that we have owned and which have been operated by the same operator continuously since January 1, 2019; excludes communities classified as held for sale or scheduled for closure and/or sale, if any.

Rental income. Rental income decreased due to the termination of our previously existing master leases with Five Star. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with the New Management Agreements for all of our senior living

38

communities operated by Five Star. See Note 10 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for information regarding the Restructuring Transaction.

Residents fees and services. Residents fees and services are the revenues earned at our managed senior living communities. We recognize these revenues as services are provided and related fees are accrued. Residents fees and services increased primarily due to the Restructuring Transaction and the resulting change to our management arrangement with Five Star for all of our senior living communities that it operates and our acquisition of one active adult rental property since January 1, 2019, partially offset by decreases in occupancy and average monthly rates primarily due to the impact of the COVID-19 pandemic at both comparable and non-comparable properties for the nine months ended September 30, 2020 compared to the nine months ended September 30, 2019. We expect to experience continued downward pressure on our occupancy and average monthly rates as normal resident move-outs may not be replaced by new resident move-ins and potential residents may increasingly delay or forgo moving into senior living communities as a result of the COVID-19 pandemic. Residents fees and services for the nine months ended September 30, 2020 is net of a $4,005 reserve for an estimated Medicare refund we expect to pay.

Property operating expenses. Property operating expenses increased primarily due to the Restructuring Transaction and the resulting change to our management arrangement with Five Star for all of our senior living communities that it operates, our acquisition of one active adult rental property since January 1, 2019 and increased costs associated with staffing and supplies due to the COVID-19 pandemic at both comparable and non-comparable properties for the nine months ended September 30, 2020 compared to the nine months ended September 30, 2019. As a result of the COVID-19 pandemic, we expect to continue experiencing higher operating expenses primarily driven by increased labor costs and increased cost and consumption of supplies, including personal protective equipment. Property operating expenses for the nine months ended September 30, 2020 includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Net operating income. The change in NOI reflects the net changes in rental income, residents fees and services and property operating expenses described above.

Non-Segment(1):

	Comparable Properties (2)				All Properties
	As of and For the Nine Months Ended September 30,				As of and For the Nine Months Ended September 30,
	2020		2019		2020		2019
Total properties:
Other triple net leased senior living communities	29		29		32		43
Wellness centers	10		10		10		10
Rent coverage:
Other triple net leased senior living communities (3)	1.63	x	1.76	x	1.63	x	1.76	x
Wellness centers (3)	1.59	x	2.36	x	1.59	x	2.36	x

(1)Non-segment operations consists of all of our other operations, including certain senior living communities leased to third party operators other than Five Star and wellness centers, which segment we do not consider to be sufficiently material to constitute a separate reporting segment, and any other income or expenses that are not attributable to a specific reporting segment.

(2)Comparable properties consists of properties that we have owned and which have been leased to the same operator continuously since January 1, 2019; excludes properties classified as held for sale, if any.

(3)All tenant operating data presented is based upon the operating results provided by our tenants for the 12 months ended June 30, 2020 and 2019 or the most recent prior period for which tenant operating results are available to us. Rent coverage is calculated using the operating cash flows from our triple net lease tenants' operations of our properties, before subordinated charges, if any, divided by triple net lease minimum rents payable to us. We have not independently verified tenant operating data. Excludes data for historical periods prior to our ownership of certain properties, as well as data for properties sold or classified as held for sale during the periods presented. Excludes rent coverage for our six wellness centers that are in default under the applicable leases with us.

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	Nine Months Ended September 30,
	Comparable (1)								Non-Comparable
	Properties Results								Properties Results				Consolidated Properties Results
					$		%										$		%
	2020		2019		Change		Change		2020		2019		2020		2019		Change		Change
Rental income	$	29,549	$	32,390	$	(2,841)	(8.8)	%	$	2,879	$	13,892	$	32,428	$	46,282	$	(13,854)	(29.9)	%
NOI	$	29,549	$	32,390	$	(2,841)	(8.8)	%	$	2,879	$	13,892	$	32,428	$	46,282	$	(13,854)	(29.9)	%

(1)Consists of properties that we have owned and which have been leased to the same operator continuously since January 1, 2019; excludes properties classified as held for sale, if any.

Rental income. Rental income decreased primarily due to the sale of 11 senior living communities leased to private operators, the transfer of one senior living community we own from a triple net leased senior living community to a managed senior living community now included in our SHOP segment since January 1, 2019 and a decrease in rental income at our comparable properties, partially offset by increased rents resulting from our purchase of improvements at our comparable properties since January 1, 2019. Rental income decreased at our comparable properties primarily due to a tenant default under leases for six of our wellness centers. As a result of the COVID-19 pandemic, many of our wellness centers had been ordered closed by state or local executive orders. In April 2020, we agreed to defer rent payments for four wellness centers in the second quarter of 2020 in exchange for the tenant agreeing to pay the deferred rents in 12 equal monthly installments which commenced in September 2020. In October 2020, the lease for these four wellness centers was renewed for a 12-year term. We continue to evaluate our options for our wellness centers operated by tenants in default of their lease obligations.

Net operating income. The change in NOI reflects the net changes in rental income described above.

Consolidated:

References to changes in the income and expense categories below relate to the comparison of consolidated results for the nine months ended September 30, 2020, compared to the nine months ended September 30, 2019.

Depreciation and amortization expense. Depreciation and amortization expense decreased primarily due to our disposition of 63 properties, certain depreciable leasing related assets becoming fully depreciated and certain of our acquired resident agreements becoming fully amortized since January 1, 2019, partially offset by our acquisition of an active adult rental property and the purchase of capital improvements at certain of our properties since January 1, 2019.

General and administrative expense. General and administrative expense decreased primarily due to a decrease in our business management fees expense as a result of lower trading prices for our common shares during the nine months ended September 30, 2020 compared to the nine months ended September 30, 2019.

Acquisition and certain other transaction related costs. Acquisition and certain other transaction related costs primarily represent costs incurred in connection with the Restructuring Transaction.

Impairment of assets. For further information about our asset impairment charges, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Gain on sale of properties. Gain on sale of properties is the net result of our sale of certain of our properties during the nine months ended September 30, 2020 and 2019. For further information regarding gain on sale of properties, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Dividend income. The decrease in dividend income is the result of our sale on July 1, 2019 of all of the RMR Inc. class A common stock that we owned.

Gains and losses on equity securities, net. Gains and losses on equity securities, net, represent the net gains and losses to adjust our investment in Five Star and former investment in RMR Inc. to their fair values.

Interest and other income. The increase in interest and other income is primarily due to $7,346 of funds we received from the U.S. Government pursuant to the CARES Act during the nine months ended September 30, 2020.

Interest expense. Interest expense increased primarily due to our issuance in June 2020 of $1,000,000 aggregate principal amount of our 9.75% senior notes due in 2025. This increase was partially offset by our redemption in May 2019 of all $400,000 of

40

our 3.25% senior notes due 2019, our prepayment in December 2019 of our $350,000 term loan, a lower interest rate, as compared to our $350,000 term loan, on our new $250,000 term loan we obtained in December 2019, which we subsequently repaid in June 2020, our redemption in April 2020 of all $200,000 of our 6.75% senior notes due 2020, a decrease in average borrowings under our revolving credit facility and decreases in LIBOR, resulting in a decrease in interest expense with respect to our floating rate debt.

Gain on lease termination. Gain on lease termination represents the gain recognized in connection with the Restructuring Transaction. For information regarding the Restructuring Transaction, see Note 10 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Loss on early extinguishment of debt. We recorded a loss on early extinguishment of debt in connection with our prepayment of our $250,000 term loan and mortgage notes during the nine months ended September 30, 2020. We recorded a loss on early extinguishment of debt in connection with our prepayment of mortgage notes during the nine months ended September 30, 2019.

Income tax (expense) benefit. Income tax (expense) benefit is the result of operating income we earned in certain jurisdictions where we are subject to state income taxes.

Equity in earnings of an investee. Equity in earnings of an investee represents our proportionate share of earnings from our investment in AIC. The decrease in equity in earnings of an investee is due to the dissolution of AIC in February 2020.

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Non-GAAP Financial Measures (dollars in thousands, except per share amounts) 

We present certain "non-GAAP financial measures" within the meaning of applicable rules of the Securities and Exchange Commission, or SEC, including funds from operations attributable to common shareholders, or FFO attributable to common shareholders, normalized funds from operations attributable to common shareholders, or Normalized FFO attributable to common shareholders, and NOI for the three and nine months ended September 30, 2020 and 2019. These measures do not represent cash generated by operating activities in accordance with GAAP and should not be considered alternatives to net income (loss) or net income (loss) attributable to common shareholders as indicators of our operating performance or as measures of our liquidity. These measures should be considered in conjunction with net income (loss) and net income (loss) attributable to common shareholders as presented in our condensed consolidated statements of comprehensive income (loss). We consider these non-GAAP measures to be appropriate supplemental measures of operating performance for a REIT, along with net income (loss) and net income (loss) attributable to common shareholders. We believe these measures provide useful information to investors because by excluding the effects of certain historical amounts, such as depreciation and amortization, they may facilitate a comparison of our operating performance between periods and with other REITs and, in the case of NOI, reflecting only those income and expense items that are generated and incurred at the property level may help both investors and management to understand the operations of our properties.

Funds From Operations and Normalized Funds From Operations Attributable to Common Shareholders

We calculate FFO attributable to common shareholders and Normalized FFO attributable to common shareholders as shown below. FFO attributable to common shareholders is calculated on the basis defined by the National Association of Real Estate Investment Trusts, which is net income (loss) attributable to common shareholders, calculated in accordance with GAAP, excluding any gain or loss on sale of properties, loss on impairment of real estate assets and gains or losses on equity securities, net, if any, plus real estate depreciation and amortization and minus FFO adjustments attributable to noncontrolling interest, as well as certain other adjustments currently not applicable to us. In calculating Normalized FFO attributable to common shareholders, we adjust for the items shown below and include business management incentive fees, if any, only in the fourth quarter versus the quarter when they are recognized as an expense in accordance with GAAP due to their quarterly volatility not necessarily being indicative of our core operating performance and the uncertainty as to whether any such business management incentive fees will be payable when all contingencies for determining such fees are known at the end of the calendar year. FFO attributable to common shareholders and Normalized FFO attributable to common shareholders are among the factors considered by our Board of Trustees when determining the amount of distributions to our shareholders. Other factors include, but are not limited to, requirements to maintain our qualification for taxation as a REIT, limitations in the agreements governing our debt, the availability to us of debt and equity capital, our expectation of our future capital requirements and operating performance, and our expected needs for and availability of cash to pay our obligations. Other real estate companies and REITs may calculate FFO attributable to common shareholders and Normalized FFO attributable to common shareholders differently than we do.

Our calculations of FFO attributable to common shareholders and Normalized FFO attributable to common shareholders for the three and nine months ended September 30, 2020 and 2019 and reconciliations of net income (loss) attributable to common shareholders, the most directly comparable financial measure under GAAP reported in our condensed consolidated financial statements, to FFO attributable to common shareholders and Normalized FFO attributable to common shareholders appear in the following table. This table also provides a comparison of distributions to shareholders, FFO attributable to common shareholders and Normalized FFO attributable to common shareholders and net income (loss) attributable to common shareholders per share for these periods.

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Net loss attributable to common shareholders	$	(106,888)	$	(29,390)	$	(123,225)	$	(36,537)
Depreciation and amortization	67,211		73,368		204,466		219,522
Loss (gain) on sale of properties	211		(4,183)		(2,403)		(21,893)
Impairment of assets	64,202		33,099		106,611		41,518
Gains and losses on equity securities, net	(12,510)		(40)		(14,541)		41,476
FFO adjustments attributable to noncontrolling interest	(5,275)		(5,277)		(15,825)		(15,871)
FFO attributable to common shareholders	6,951		67,577		155,083		228,215
Acquisition and certain other transaction related costs	53		2,492		803		11,209
Costs and payment obligations related to compliance assessment at one of our senior living communities(1)	6,172		—		6,172		—
Gain on lease termination	—		—		(22,896)		—
Loss on early extinguishment of debt	—		—		427		17
Normalized FFO attributable to common shareholders	$	13,176	$	70,069	$	139,589	$	239,441
Weighted average common shares outstanding (basic)	237,752		237,608		237,707		237,585
Weighted average common shares outstanding (diluted)	237,752		237,608		237,707		237,585
Per common share data (basic and diluted):
Net loss attributable to common shareholders	$	(0.45)	$	(0.12)	$	(0.52)	$	(0.15)
FFO attributable to common shareholders	$	0.03	$	0.28	$	0.65	$	0.96
Normalized FFO attributable to common shareholders	$	0.06	$	0.29	$	0.59	$	1.01
Distributions declared	$	0.01	$	0.15	$	0.17	$	0.69

(1)Costs and payment obligations related to compliance assessment at one of DHC’s senior living communities consist of residents fees and services as well as property operating expenses. Residents fees and services for the three and nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three and nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Property Net Operating Income (NOI)

We calculate NOI as shown below. The calculation of NOI excludes certain components of net income (loss) in order to provide results that are more closely related to our property level results of operations. We define NOI as income from our real estate less our property operating expenses. NOI excludes amortization of capitalized tenant improvement costs and leasing commissions that we record as depreciation and amortization. We use NOI to evaluate individual and company wide property level performance. Other real estate companies and REITs may calculate NOI differently than we do.

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The calculation of NOI by reportable segment is included above in this Item 2. The following table includes the reconciliation of net income (loss) to NOI for the three and nine months ended September 30, 2020 and 2019, respectively.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Reconciliation of Net Income (Loss) to NOI:
Net loss	$	(105,788)	$	(27,946)	$	(119,387)	$	(32,258)
Equity in earnings of an investee	—		(83)		—		(617)
Income tax expense (benefit)	365		(146)		1,048		(47)
Loss from continuing operations before income tax (expense) benefit and equity in earnings of an investee	(105,423)		(28,175)		(118,339)		(32,922)
Loss on early extinguishment of debt	—		—		427		17
Gain on lease termination	—		—		(22,896)		—
Interest expense	58,091		44,817		143,715		136,840
Interest and other income	(134)		(238)		(8,008)		(590)
Gains and losses on equity securities, net	(12,510)		(40)		(14,541)		41,476
Dividend income	—		—		—		(1,846)
Loss (gain) on sale of properties	211		(4,183)		(2,403)		(21,893)
Impairment of assets	64,202		33,099		106,611		41,518
Acquisition and certain other transaction related costs	53		2,492		803		11,209
General and administrative	6,988		9,604		23,132		28,287
Depreciation and amortization	67,211		73,368		204,466		219,522
Total NOI	$	78,689	$	130,744	$	312,967	$	421,618
Office Portfolio NOI	$	60,787	$	65,826	$	191,468	$	208,730
SHOP NOI (1)	7,899		49,655		89,071		166,606
Non-Segment NOI	10,003		15,263		32,428		46,282
Total NOI	$	78,689	$	130,744	$	312,967	$	421,618

(1)Residents fees and services for the three and nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three and nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

LIQUIDITY AND CAPITAL RESOURCES 

Our principal sources of cash to meet operating and capital expenses, pay debt service obligations and make distributions to our shareholders are the operating cash flows we generate as rental income from our leased properties, residents fees and services revenues from our managed communities, borrowings under our revolving credit facility and proceeds from the disposition of certain properties. We believe that these sources will be sufficient to meet our operating and capital expenses, pay debt service obligations and make distributions to our shareholders for the next 12 months and for the foreseeable future thereafter. Our future cash flows from operating activities will depend primarily upon:

•our ability to receive rents from our tenants in light of the COVID-19 pandemic and resulting economic downturn and generally;

•our ability to maintain or increase the occupancy of, and the rental rates at, our properties or reduce the extent of the declines in occupancy and rental rates in response to the COVID-19 pandemic and resulting economic downturn, particularly at our senior living communities;

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•our ability to control operating expenses and capital expenses at our properties, including increased operating expenses in response to the COVID-19 pandemic; and

•our manager's ability to operate our managed senior living communities during the COVID-19 pandemic and generally so as to maintain or increase our returns or, during the COVID-19 pandemic and resulting economic downturn, to reduce the extent of the declines in our returns.

We continue to carefully monitor the developments of the COVID-19 pandemic and resulting economic downturn and their impact on our tenants, operators and other stakeholders, including at our senior living communities.

In response to the operating challenges and uncertain economic challenges as a result of the COVID-19 pandemic, in June 2020, we issued $1.0 billion aggregate principal amount of our 9.75% senior notes due 2025. We used the net proceeds from this offering to prepay in full our $250.0 million unsecured term loan that was scheduled to mature on June 12, 2020 and to reduce amounts outstanding under our revolving credit facility. Additionally, beginning in the second quarter of 2020, we reduced our quarterly cash distribution rate on our common shares to $0.01 per share. As of November 2, 2020, we granted requests for certain of our tenants to defer rent payments totaling $2.2 million with respect to leases that represent, as of September 30, 2020, approximately 5.3% of our annualized rental income. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. For the three months ended September 30, 2020, we collected approximately 99% of our contractual rents due from tenants in our Office Portfolio segment.

During the nine months ended September 30, 2020, we sold 17 properties for an aggregate sales price of $80.6 million, excluding closing costs. In October and November 2020, we sold four properties for an aggregate sales price of $49.0 million, excluding closing costs, and as of November 2, 2020, we had 21 properties under agreements to sell for an aggregate sales price of approximately $167.4 million, excluding closing costs. The impact of the COVID-19 pandemic and the resulting economic conditions is likely to cause many of these property sales to be delayed or occur over a protracted period of time or not at all. The measures noted above and anticipated sales of our properties may not sufficiently offset the decrease in cash flows from operations and essential capital investments we make during the COVID-19 pandemic, which may negatively impact our liquidity and result in increased borrowings under our revolving credit facility.

The following is a summary of our sources and uses of cash flows for the periods presented, as reflected in our condensed consolidated statements of cash flows (dollars in thousands):

	Nine Months Ended September 30,
	2020		2019
Cash and cash equivalents and restricted cash at beginning of period	$	52,224	$	70,071
Net cash provided by (used in):
Operating activities	158,979		195,670
Investing activities	(42,136)		(26,234)
Financing activities	(70,692)		(176,058)
Cash and cash equivalents and restricted cash at end of period	$	98,375	$	63,449

Our Operating Liquidity and Resources

We generally receive minimum rents from our tenants monthly or quarterly, we receive residents fees and services revenues, net of expenses, from our managed senior living communities monthly and we receive percentage rents from certain of our senior living community tenants monthly, quarterly or annually.

The decrease in cash provided by operating activities for the nine months ended September 30, 2020 compared to the prior period was primarily due to the Restructuring Transaction and the results from the converted managed communities for the 2020 period being less than our rental income for these communities in the 2019 period, as well as reduced NOI as a result of dispositions of properties during 2019 and 2020 and resulting changes in our working capital assets and liabilities from the converted managed communities which are now included in our condensed consolidated balance sheets commencing in the 2020 period. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with the New Management Agreements for all of our senior living communities operated by Five Star, as described in Note 10 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q. The decreases noted above are partially offset by a decrease in business management fee expenses in the 2020 period compared to the 2019 period, particularly as a result of no business management incentive fee expense having been paid in the 2020 period.

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As noted elsewhere in this Quarterly Report on Form 10-Q, the COVID-19 pandemic has had a substantial adverse impact on the global economy. Depending on the duration and severity of this pandemic and the resulting economic downturn, our tenants' and operators' businesses may become significantly adversely impacted, which may result in their failing to pay rent to us or to renew their leases upon expiration, and we will realize decreased returns from our senior living communities. We have granted requests for certain of our tenants to defer rent payments totaling $2.2 million. As of September 30, 2020, we recognized an increase in our accounts receivable balance related to these deferred rent payments of $4.5 million. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. For the three months ended September 30, 2020, we collected approximately 99% of our contractual rents due from tenants in our Office Portfolio segment. We are handling requests from our tenants for relief on an individual basis. We also believe that, other than in our SHOP segment, overall tenant retention levels may increase as a result of the COVID-19 pandemic.

Our Investing Liquidity and Resources

The increase in cash used in investing activities for the nine months ended September 30, 2020 compared to the prior year period was primarily due to proceeds from our sale of all of the RMR Inc. class A common stock that we owned in the 2019 period, partially offset by a decrease in real estate improvements and higher proceeds from the sale of real estate properties in the 2020 period compared to the 2019 period.

The following is a summary of cash used for capital expenditures, development, redevelopment and other activities for the periods presented (dollars in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Office Portfolio segment capital expenditures:
Lease related costs (1)	$	4,411	$	4,622	$	13,293	$	16,906
Building improvements (2)	4,990		5,673		11,363		9,597
SHOP segment fixed assets and capital improvements	15,988		4,997		37,411		11,796
Recurring capital expenditures	$	25,389	$	15,292	$	62,067	$	38,299
Development, redevelopment and other activities - Office Portfolio segment (3)	$	14,832	$	8,220	$	37,987	$	23,564
Development, redevelopment and other activities - SHOP segment (3)(4)	4,927		7,509		19,926		26,386
Total development, redevelopment and other activities	$	19,759	$	15,729	$	57,913	$	49,950

(1)Office Portfolio segment lease related costs generally include capital expenditures to improve tenants' space or amounts paid directly to tenants to improve their space and other leasing related costs, such as brokerage commissions and tenant inducements.

(2)Office Portfolio segment building improvements generally include expenditures to replace obsolete building components that extend the useful life of existing assets or other improvements to increase the marketability of the property.

(3)Development, redevelopment and other activities generally include capital expenditures that reposition a property or result in new sources of revenue.

(4)Prior period includes capital improvements for communities that were previously leased to Five Star.

During the three and nine months ended September 30, 2020, we invested $0.5 million and $1.3 million, respectively, in revenue producing capital improvements at certain of our triple net leased senior living communities leased to private operators, and, as a result, annual rent payable to us increased by approximately $0.03 million and $0.07 million, respectively, pursuant to the terms of the applicable leases. We used cash on hand and borrowings under our revolving credit facility to fund these purchases. These capital improvement amounts are not included in the table above.

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During the three months ended September 30, 2020, commitments made for expenditures in connection with leasing space in our medical office and life science properties, such as tenant improvements and leasing costs, were as follows (dollars and square feet in thousands, except per square foot amounts):

	New Leases		Renewals		Total
Square feet leased during the quarter	67		135		202
Total leasing costs and concession commitments (1)	$	3,632	$	1,331	$	4,963
Total leasing costs and concession commitments per square foot (1)	$	54.57	$	9.85	$	24.60
Weighted average lease term (years) (2)	8.8		5.7		7.0
Total leasing costs and concession commitments per square foot per year (1)	$	6.20	$	1.73	$	3.51

(1)Includes commitments made for leasing expenditures and concessions, such as tenant improvements, leasing commissions, tenant reimbursements and free rent.

(2)Weighted based on annualized rental income pursuant to existing leases as of September 30, 2020, including straight line rent adjustments and estimated recurring expense reimbursements, and excluding lease value amortization.

We plan to continue investing essential capital in our senior living communities to better position these communities in their respective markets in order to increase our returns in future years, but certain projects have been delayed and may continue to be delayed in the future due to COVID-19 related community access restrictions and other state and local ordinances that may limit our ability to proceed with these projects on a timely basis.

As of September 30, 2020, we have estimated unspent leasing related obligations at our triple net leased senior living communities and our medical office and life science properties of approximately $18.4 million.

We are currently in the process of redeveloping three properties in our Office Portfolio located in Tempe, AZ, San Diego, CA and Lexington, MA. These redevelopment projects may require significant capital expenditures and time to complete. During the three months ended September 30, 2020, we entered into a new 10-year lease at a rental rate that is approximately 20% higher than the prior rental rate for the same space at one of these buildings located in San Diego, CA. We have continued to progress on these redevelopments during 2020.

We expect disruptions to future disposition activity due to uncertain market conditions as a result of the COVID-19 pandemic and resulting economic conditions. For further information regarding our acquisitions and dispositions, see Note 3 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Pursuant to the Restructuring Transaction, on January 1, 2020, Five Star issued 10,268,158 Five Star common shares to us and an aggregate of 16,118,849 Five Star common shares to our shareholders of record as of December 13, 2019. In consideration of these share issuances, we provided Five Star with $75.0 million of additional consideration. For further information regarding the Restructuring Transaction, see Note 10 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Our Financing Liquidity and Resources

The decrease in cash used in financing activities for the nine months ended September 30, 2020 compared to the prior period was primarily due to net proceeds from our issuance in June 2020 of $1.0 billion aggregate principal amount of our 9.75% senior notes, decreased repayments of senior unsecured notes in the 2020 period and a reduction in distributions paid to our shareholders in the 2020 period, partially offset by our repayment in June 2020 of our $250.0 million senior unsecured term loan and increased repayments of borrowings under our revolving credit facility in the 2020 period compared to the 2019 period.

As of September 30, 2020, we had $82.2 million of cash and cash equivalents and $1.0 billion available to borrow under our revolving credit facility. We typically use cash balances, borrowings under our revolving credit facility, net proceeds from offerings of debt or equity securities, net proceeds from the disposition of assets and the cash flows from our operations to fund our operations, debt repayments, distributions, property acquisitions, capital expenditures and other general business purposes.

    In order to fund acquisitions and to meet cash needs that may result from timing differences between our receipt of rents and our desire or need to make distributions or pay operating or capital expenses, we maintain a $1.0 billion unsecured revolving credit facility. The maturity date of our revolving credit facility is January 15, 2022, and, subject to the payment of an extension fee and meeting other conditions, we have the option to extend the maturity date of the facility for an additional year.

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Our revolving credit facility provides that we can borrow, repay and re-borrow funds available under our revolving credit facility until maturity, and no principal repayment is due until maturity. The facility also includes a feature pursuant to which, following the termination of the Amendment Period, in certain circumstances maximum borrowings under the facility may be increased to up to $2.0 billion. At September 30, 2020, our revolving credit facility required interest to be paid on borrowings at the annual rate of 2.6%, plus a facility fee of 30 basis points per annum on the total amount of lending commitments under the facility. The interest rate premium and facility fee are each subject to adjustment based upon changes to our credit ratings. As of September 30, 2020 and November 2, 2020, we had no outstanding borrowings under our revolving credit facility.

In June 2020, we amended our credit and term loan agreements. The amendments modify certain of the financial covenants under these agreements through the Amendment Period, during which, subject to certain conditions, we will continue to have access to undrawn amounts under our revolving credit facility. We have the right to terminate the Amendment Period prior to June 30, 2021, subject to certain conditions. During the Amendment Period:

•our interest rate premium over LIBOR under our revolving credit facility and term loan increased by 50 basis points;

•we will generally be required to apply the net cash proceeds from the disposition of assets, capital markets transactions, debt financings or COVID-19 government stimulus programs, if allowed, to the repayment of outstanding loans under our revolving credit facility, if any;

•we will be subject to certain additional covenants, including additional restrictions on our ability to incur indebtedness (with exceptions for borrowings under our revolving credit facility and certain other categories of secured and unsecured indebtedness), and to acquire real property or make other investments (with exceptions for, among other things, certain categories of capital expenditures and costs);

•we will be required to maintain unrestricted liquidity (unrestricted cash and undrawn availability under our revolving credit facility) of not less than $200.0 million; and

•our ability to pay distributions on our common shares will be limited to paying a cash dividend of $0.01 per common share per quarter and amounts required to maintain our qualification for taxation as a REIT and to avoid the payment of certain income and excise taxes.

When significant amounts are outstanding under our revolving credit facility, or as the maturities of our indebtedness approach, we intend to explore refinancing alternatives. Such alternatives may include incurring additional debt, selling certain properties and issuing new equity securities. In addition, we may also seek to participate in joint ventures or other arrangements that may provide us additional sources of financing. We currently have an effective shelf registration statement that allows us to issue public securities on an expedited basis, but it does not assure that there will be buyers for such securities. We may also assume debt in connection with our acquisitions of properties or place new debt on properties we own. 

We have a $200.0 million unsecured term loan that matures on September 28, 2022. This term loan includes a feature under which maximum borrowings may be increased to up to $400.0 million in certain circumstances. At September 30, 2020, this term loan required interest to be paid at the annual rate of 2.8%. The interest rate premium is subject to adjustment based upon changes to our credit ratings.

During the nine months ended September 30, 2020, we paid quarterly cash distributions to our shareholders totaling approximately $40.4 million using existing cash balances and borrowings under our revolving credit facility. On October 15, 2020, we declared a quarterly distribution payable to common shareholders of record on October 26, 2020, of $0.01 per share, or approximately $2.4 million. We expect to pay this distribution on or about November 19, 2020 using cash on hand. For further information regarding the distribution we paid during 2020, see Note 8 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

We believe we will have access to various types of financings, including debt or equity offerings, to fund our future acquisitions and to pay our debts and other obligations as they become due. Our ability to complete, and the costs associated with, future debt transactions depends primarily upon credit market conditions and our then creditworthiness. We have no control over market conditions. Our credit and debt ratings, which were recently downgraded, depend upon evaluations by credit rating agencies of our business practices and plans, including our ability to maintain our earnings, to stagger our debt maturities and to balance our use of debt and equity capital so that our financial performance and leverage ratios afford us flexibility to withstand any reasonably anticipated adverse changes. Similarly, our ability to raise equity capital in the future will depend primarily upon equity capital market conditions and our ability to conduct our business to maintain and grow our operating cash flows. We intend to conduct our business activities in a manner which will afford us reasonable access to capital

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for investment and financing activities, but we cannot be sure that we will be able to successfully carry out that intention. As noted elsewhere in this Quarterly Report on Form 10-Q, it is uncertain what the duration and severity of the current economic downturn resulting from the COVID-19 pandemic will be. A protracted economic downturn may have various negative consequences including a decline in financing availability and increased costs for financing. Further, such conditions could also disrupt capital markets and limit our access to financing from public sources, particularly if the global financial markets experience significant disruptions.

In February 2020, we prepaid a mortgage note secured by one of our life science properties with an outstanding principal balance of approximately $1.6 million, a maturity date in March 2026 and an annual interest rate of 6.25%. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In March 2020, our issuer credit rating was downgraded from BB+ to BB by S&P Global, or S&P, following our fourth quarter 2019 earnings release and the beginning of the awareness of the possible impact of the COVID-19 pandemic in the United States. Our unsecured debt rating was downgraded below BBB- by S&P and, as a result, the interest rate premiums under our revolving credit facility and then existing term loans increased effective April 1, 2020.

In April 2020, we redeemed all of our outstanding 6.75% senior notes due 2020 for a redemption price equal to the principal amount of $200.0 million plus accrued and unpaid interest of $6.75 million. We funded this redemption with cash on hand and borrowings under our revolving credit facility.

In May 2020, Moody's Investors Service, or Moody's, downgraded our senior unsecured debt rating from Ba1 to Ba2. However, Moody's assigned a Ba1 rating to our recently issued 9.75% senior notes due 2025.

Also in May 2020, we prepaid a mortgage note secured by one of our medical office properties with an outstanding principal balance of approximately $1.2 million, a maturity date in January 2022 and an annual interest rate of 7.49%. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In June 2020, we issued $1.0 billion aggregate principal amount of our 9.75% senior notes due 2025 in an underwritten public offering. These notes are guaranteed by all of our subsidiaries, except for certain excluded subsidiaries. We used the net proceeds from this offering to prepay in full our $250.0 million unsecured term loan that was scheduled to mature on June 12, 2020 and to reduce amounts outstanding under our revolving credit facility.

For further information regarding our outstanding debt, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Except for the limitations in the amendments to our credit and term loan agreements described above, our strategy related to property acquisitions and dispositions is materially unchanged from that disclosed in our Annual Report. Our plans for particular properties and other strategic considerations may cause us to change our acquisition and disposition strategies, and we may do so at any time and without shareholder approval. Further, such plans may continue to be impacted by the scope and duration of the COVID-19 pandemic.

Off Balance Sheet Arrangements 

As of September 30, 2020, we had no off balance sheet arrangements that have had or that we expect would be reasonably likely to have a material effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources. 

Debt Covenants

Our principal debt obligations at September 30, 2020 were: (1) $2.7 billion outstanding principal amount of senior unsecured notes; (2) $200.0 million outstanding principal amount under our term loan; and (3) $685.0 million aggregate principal amount of mortgage notes (excluding premiums, discounts and net debt issuance costs) secured by seven properties. For further information regarding our indebtedness, see Note 5 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

Our senior unsecured notes are governed by our senior unsecured notes indentures and their supplements. Our credit and term loan agreements and our senior unsecured notes indentures and their supplements provide for acceleration of payment of all amounts outstanding upon the occurrence and continuation of certain events of default, such as, in the case of our credit and term loan agreements, a change of control of us, as defined, which includes RMR LLC ceasing to act as our business and

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property manager. Our senior unsecured notes indentures and their supplements and our credit and term loan agreements also contain covenants that restrict our ability to incur debts, including debts secured by mortgages on our properties, in excess of calculated amounts and require us to maintain various financial ratios, and our credit and term loan agreements contain covenants that restrict our ability to make distributions to our shareholders in certain circumstances. As of September 30, 2020, we believe we were in compliance with all of the covenants under our senior unsecured notes indentures and their supplements, our credit and term loan agreements and our other debt obligations. Although we have taken steps to enhance our ability to maintain sufficient liquidity, as noted elsewhere in this Quarterly Report on Form 10-Q, a protracted negative economic impact resulting from the COVID-19 pandemic may cause increased pressure on our ability to satisfy financial and other covenants. If we believe we would not be able to satisfy our financial or other covenants, we would seek waivers or amendments prior to any covenant violation, which may lead to increased costs and interest rates, additional restrictive covenants or other lender protections. We can provide no assurance that we would be able to obtain these waivers or amendments or repay the related debt facilities, which would lead to an event of default or potential acceleration of amounts due on our outstanding debt.

Neither our senior unsecured notes indentures and their supplements, nor our credit and term loan agreements, contain provisions for acceleration which could be triggered by our debt ratings. However, under our credit and term loan agreements, our senior unsecured debt ratings are used to determine the fees and interest rates we pay. Accordingly, following our debt ratings downgrades, our interest expense and related costs under our credit and term loan agreements have increased. See "—Our Financing Liquidity and Resources" above for information regarding recent downgrades of our issuer credit rating and senior unsecured debt rating that resulted in a change in the interest rate premiums under our revolving credit facility and term loan.

Our senior unsecured notes indentures and their supplements contain cross default provisions to any other debts of more than $20.0 million ($50.0 million or more in the case of our senior unsecured notes indentures and supplements entered in February 2016, February 2018 and June 2020). Similarly, our credit and term loan agreements have cross default provisions to other indebtedness that is recourse of $25.0 million or more and indebtedness that is non-recourse of $75.0 million or more. 

The loan agreements governing the aggregate $620.0 million secured debt financing on the property owned by our joint venture contain customary covenants and provide for acceleration of payment of all amounts due thereunder upon the occurrence and continuation of certain events of default.

Supplemental Guarantor Information 

In March 2020, the SEC released Release No. 33-10762, Financial Disclosures About Guarantors and Issuers of Guaranteed Securities and Affiliates Whose Securities Collateralize a Registrant's Securities, or Release 33-10762. Release 33-10762 amends the disclosure requirements related to certain registered securities under SEC Regulation S-X, Rules 3-10 and 3-16, permitting registrants to provide certain alternative financial disclosures and non-financial disclosures in lieu of separate consolidating financial statements for subsidiary issuers and guarantors of registered debt securities if certain conditions are met. The amendments in Release 33-10762 are generally effective for filings on or after January 4, 2021, with early adoption permitted. We adopted the new disclosure requirements permitted under Release 33-10762 effective for the period ended March 31, 2020.

All $1.0 billion of our 9.75% senior notes due 2025 are fully and unconditionally guaranteed, on a joint and several basis and on a senior unsecured basis, by all of our subsidiaries, except for certain excluded subsidiaries. The notes and the guarantees will be effectively subordinated to all of our and the subsidiary guarantors' secured indebtedness, respectively, to the extent of the value of the collateral securing such secured indebtedness, and will be structurally subordinated to all indebtedness and other liabilities and any preferred equity of any of our subsidiaries that do not guarantee the notes. Our remaining $1.65 billion of senior unsecured notes do not have the benefit of any guarantees.

A subsidiary guarantor's guarantee of our 9.75% senior notes due 2025 and all other obligations of such subsidiary guarantor under the indenture governing the notes will automatically terminate and such subsidiary guarantor will automatically be released from all of its obligations under such subsidiary guarantee and the indenture under certain circumstances, including on or after the date (a) the notes have an investment grade rating from two rating agencies and one of such investment grade ratings is a mid-BBB investment grade rating and (b) no default or event of default has occurred and is continuing under the indenture. Our non-guarantor subsidiaries are separate and distinct legal entities and will have no obligation, contingent or otherwise, to pay any amounts due on our 9.75% senior notes due 2025 or the guarantees, or to make any funds available therefor, whether by dividend, distribution, loan or other payments. The rights of holders of our 9.75% senior notes due 2025 to benefit from any of the assets of our non-guarantor subsidiaries are subject to the prior satisfaction of claims of those subsidiaries' creditors and any preferred equity holders. As a result, our 9.75% senior notes due 2025 and the guarantees will be structurally subordinated to all indebtedness, guarantees and other liabilities of our subsidiaries that do not guarantee our 9.75%

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senior notes due 2025, including guarantees of other indebtedness of ours, payment obligations under lease agreements, trade payables and preferred equity.

The following tables present summarized financial information for guarantor entities, on a combined basis after eliminating (i) intercompany transactions and balances among the guarantor entities and (ii) equity in earnings from, and any investments in, any subsidiary that is a non-guarantor (dollars in thousands):

	September 30, 2020		December 31, 2019
Real estate properties, net	$	5,062,743	$	5,212,252
Other assets, net	380,278		260,169
Total assets	$	5,443,021	$	5,472,421
Indebtedness, net	$	2,813,547	$	2,815,796
Other liabilities	311,746		182,092
Total liabilities	$	3,125,293	$	2,997,888
	Nine Months Ended September 30, 2020		Year Ended December 31, 2019
Revenues	$	1,149,167	$	888,704
Expenses	1,195,697		819,054
Loss from continuing operations	(123,492)		(84,136)
Net loss	(124,540)		(84,172)
Net loss attributable to DHC	(124,540)		(84,172)

Related Person Transactions 

We have relationships and historical and continuing transactions with RMR LLC, RMR Inc., Five Star and others related to them. For example: we have no employees and the personnel and various services we require to operate our business are provided to us by RMR LLC pursuant to our business and property management agreements with RMR LLC; RMR Inc. is the managing member of RMR LLC; Adam Portnoy, the Chair of our Board of Trustees and one of our Managing Trustees, is the sole trustee, an officer and the controlling shareholder of ABP Trust, which is the controlling shareholder of RMR Inc., and he is also a managing director and the president and chief executive officer of RMR Inc., an officer and employee of RMR LLC and the chair of the board of directors and a managing director of Five Star; Jennifer Clark, our other Managing Trustee and our Secretary, is a managing director and the executive vice president, general counsel and secretary of RMR Inc., an officer and employee of RMR LLC, an officer of ABP Trust and a managing director and the secretary of Five Star; and each of our officers is also an officer and employee of RMR LLC. We have relationships and historical and continuing transactions with other companies to which RMR LLC or its subsidiaries provide management services, and some of which have trustees, directors or officers who are also trustees, directors or officers of us, RMR LLC or RMR Inc. and some of our Trustees and officers serve as trustees, directors or officers of these companies. For example, Five Star is our former subsidiary and former largest tenant, and it currently manages most of our senior living communities and we and Five Star restructured our business arrangements as of January 1, 2020. We and Adam Portnoy, directly and indirectly through ABP Trust and its subsidiaries, are significant stockholders of Five Star, owning, as of September 30, 2020, 33.9% and 6.4%, respectively, of outstanding Five Star common shares.

For further information about these and other such relationships and related person transactions, see Notes 10, 11 and 12 to our condensed consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, our Annual Report, our definitive Proxy Statement for our 2020 Annual Meeting of Shareholders and our other filings with the SEC. In addition, see the section captioned “Risk Factors” of our Annual Report and in this Quarterly Report on Form 10-Q for a description of risks that may arise as a result of these and other related person transactions and relationships. Our filings with the SEC and copies of certain of our agreements with these related persons, including our business and property management agreements with RMR LLC and our various agreements with Five Star, are available as exhibits to our filings with the SEC and accessible at the SEC's website, www.sec.gov. We may engage in additional transactions with related persons, including businesses to which RMR LLC or its subsidiaries provide management services.

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Impact of Government Reimbursement 

For the nine months ended September 30, 2020, substantially all of our NOI was generated from properties where a majority of the revenues are derived from our tenants' and residents' private resources, and the remainder of our NOI was generated from properties where a majority of the revenues are derived from Medicare and Medicaid payments. Nonetheless, we own, and our tenants and manager operate, facilities in many states that participate in federal and state healthcare payment programs, including the federal Medicare and state Medicaid programs and other federal and state healthcare payment programs. Also, some of our medical office and life science property tenants participate in federal Medicare and state Medicaid programs and other government healthcare payment programs.

For more information regarding the government healthcare funding and regulation of our business, please see the section captioned “Business—Government Regulation and Reimbursement” in our Annual Report and the section captioned “Management's Discussion and Analysis of Financial Condition and Results of Operations—Impact of Government Reimbursement” in our Annual Report.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk. 

We are exposed to risks associated with market changes in interest rates. We manage our exposure to this market risk by monitoring available financing alternatives. Our strategy to manage exposure to changes in interest rates has not materially changed since December 31, 2019. Other than as described below, we do not currently foresee any significant changes in our exposure to fluctuations in interest rates or in how we manage this exposure in the near future.

Although we have no present plans to do so, we may in the future enter into hedge arrangements or derivative contracts from time to time to mitigate our exposure to changes in interest rates.

Fixed Rate Debt

At September 30, 2020, our outstanding fixed rate debt included the following (dollars in thousands):

			Annual		Annual
	Principal		Interest		Interest			Interest
Debt	Balance (1)		Rate (1)		Expense		Maturity	Payments Due
Senior unsecured notes	$	300,000	6.75	%	$	20,250	2021	Semi-Annually
Senior unsecured notes	250,000		4.75	%	11,875		2024	Semi-Annually
Senior unsecured notes	1,000,000		9.75	%	97,500		2025	Semi-Annually
Senior unsecured notes	500,000		4.75	%	23,750		2028	Semi-Annually
Senior unsecured notes	350,000		5.63	%	19,705		2042	Quarterly
Senior unsecured notes	250,000		6.25	%	15,625		2046	Quarterly
Mortgage note	12,011		6.28	%	754		2022	Monthly
Mortgage note	10,784		4.85	%	523		2022	Monthly
Mortgage note	15,889		5.75	%	914		2022	Monthly
Mortgage note	15,752		6.64	%	1,046		2023	Monthly
Mortgage notes (2)	620,000		3.53	%	21,886		2026	Monthly
Mortgage note	10,526		4.44	%	467		2043	Monthly
	$	3,334,962			$	214,295

(1)The principal balances and interest rates are the amounts stated in the applicable contracts. In accordance with GAAP, our carrying values and recorded interest expense may differ from these amounts because of market conditions at the time we assumed certain of these debts. This table does not include obligations under finance leases.

(2)The life science property encumbered by these mortgages is owned in a joint venture arrangement in which we own a 55% equity interest. The principal amounts listed in the table for these debts have not been adjusted to reflect the equity interest in the joint venture that we do not own.

No principal repayments are due under our unsecured notes until maturity. Our mortgage notes generally require principal and interest payments through maturity pursuant to amortization schedules. Because these debts require interest to be paid at a

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fixed rate, changes in market interest rates during the term of these debts will not affect our interest obligations. If these debts were refinanced at interest rates which are one percentage point higher or lower than shown above, our annual interest cost would increase or decrease by approximately $33.3 million.

Changes in market interest rates also would affect the fair value of our fixed rate debt obligations; increases in market interest rates decrease the fair value of our fixed rate debt, while decreases in market interest rates increase the fair value of our fixed rate debt. Based on the balances outstanding at September 30, 2020, and discounted cash flows analyses through the respective maturity dates, and assuming no other changes in factors that may affect the fair value of our fixed rate debt obligations, a hypothetical immediate one percentage point increase in interest rates would change the fair value of those obligations by approximately $35.4 million.

Our senior unsecured notes and certain of our mortgages contain provisions that allow us to make repayments earlier than the stated maturity date. In some cases, we are not allowed to make early repayment prior to a cutoff date and we are generally allowed to make prepayments only at a premium equal to a make whole amount, as defined, which is generally designed to preserve a stated yield to the noteholder. In the past, we have repurchased and retired some of our outstanding debts and we may do so again in the future. These prepayment rights and our ability to repurchase and retire outstanding debt may afford us opportunities to mitigate the risk of refinancing our debts at maturity at higher rates by refinancing prior to maturity.

Floating Rate Debt

At September 30, 2020, our floating rate debt obligations consisted of our $1.0 billion revolving credit facility, under which we had no outstanding borrowings, and our $200.0 million term loan. Our revolving credit facility matures in January 2022, and, subject to our payment of an extension fee and our meeting other conditions, we have the option to extend the stated maturity date by one year to January 2023. Generally, no principal repayments are required under our revolving credit facility prior to maturity, and we can borrow, repay and re-borrow funds available, subject to conditions, at any time without penalty. Our $200.0 million term loan matures in September 2022 and is prepayable without penalty at any time.

Borrowings under our revolving credit facility and term loan are in U.S. dollars and interest is required to be paid at the rate of LIBOR plus premiums that are subject to adjustment based upon changes to our credit ratings. Accordingly, we are exposed to interest rate risk for changes in U.S. dollar based short term rates, specifically LIBOR, and to changes in our credit ratings. In addition, upon renewal or refinancing of our revolving credit facility or our term loan, we are vulnerable to increases in interest rate premiums due to market conditions or our perceived credit characteristics. Generally, a change in interest rates would not affect the value of our floating rate debt but would affect our operating results.

The following table presents the impact a one percentage point increase in interest rates would have on our annual floating rate interest expense as of September 30, 2020 (dollars in thousands except per share amounts):

	Impact of Changes in Interest Rates
			Outstanding		Total Interest		Annual Earnings
	Interest Rate (1)		Floating Rate Debt		Expense Per Year		Per Share Impact (2)
At September 30, 2020	2.75	%	$	200,000	$	5,500	$	0.02
One percentage point increase	3.75	%	$	200,000	$	7,500	$	0.03

(1)Weighted based on the respective interest rates and outstanding borrowings under our credit facility and term loan as of September 30, 2020.

(2)Based on weighted average number of shares outstanding (basic and diluted) for the nine months ended September 30, 2020.

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The following table presents the impact a one percentage point increase in interest rates would have on our annual floating rate interest expense as of September 30, 2020 if we were fully drawn on our revolving credit facility and our term loan remained outstanding (dollars in thousands except per share amounts):

	Impact of Changes in Interest Rates
			Outstanding		Total Interest		Annual Earnings
	Interest Rate (1)		Floating Rate Debt		Expense Per Year		Per Share Impact (2)
At September 30, 2020	2.58	%	$	1,200,000	$	30,960	$	0.13
One percentage point increase	3.58	%	$	1,200,000	$	42,960	$	0.18

(1)Weighted based on the respective interest rates and outstanding borrowings under our credit facility (assuming fully drawn) and term loan as of September 30, 2020.

(2)Based on weighted average number of shares outstanding (basic and diluted) for the nine months ended September 30, 2020.

The foregoing tables show the impact of an immediate increase in floating interest rates. If interest rates were to increase gradually over time, the impact would be spread over time. Our exposure to fluctuations in floating interest rates will increase or decrease in the future with increases or decreases in the amount of our borrowings outstanding under our revolving credit facility or other floating rate debt.

LIBOR Phase Out

LIBOR is currently expected to be phased out in 2021. We are required to pay interest on borrowings under our revolving credit facility and term loan at floating rates based on LIBOR. Future debt that we may incur may also require that we pay interest based upon LIBOR. We currently expect that the determination of interest under our credit facility and term loan agreements would be revised as provided under the agreement or amended as necessary to provide for an interest rate that approximates the existing interest rate as calculated in accordance with LIBOR. Despite our current expectations, we cannot be sure that, if LIBOR is phased out or transitioned, the changes to the determination of interest under our agreements would approximate the current calculation in accordance with LIBOR. We do not know what standard, if any, will replace LIBOR if it is phased out or transitioned.

Item 4.  Controls and Procedures.

As of the end of the period covered by this Quarterly Report on Form 10-Q, our management carried out an evaluation, under the supervision and with the participation of our Managing Trustees, our President and Chief Operating Officer and our Chief Financial Officer and Treasurer, of the effectiveness of our disclosure controls and procedures pursuant to Rules 13a-15 and 15d-15 under the Securities Exchange Act of 1934, as amended. Based upon that evaluation, our Managing Trustees, our President and Chief Operating Officer and our Chief Financial Officer and Treasurer concluded that our disclosure controls and procedures are effective.

There have been no changes in our internal control over financial reporting during the quarter ended September 30, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Warning Concerning Forward-Looking Statements

This Quarterly Report on Form 10-Q contains statements that constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other securities laws. Also, whenever we use words such as “believe”, “expect”, “anticipate”, “intend”, “plan”, “estimate”, “will”, “may” and negatives or derivatives of these or similar expressions, we are making forward-looking statements. These forward-looking statements are based upon our present intent, beliefs or expectations, but forward-looking statements are not guaranteed to occur and may not occur. Forward-looking statements in this Quarterly Report on Form 10-Q relate to various aspects of our business, including:

•The duration and severity of the economic downturn resulting from the COVID-19 pandemic and its impact on us and our tenants' and operators' businesses,

•The likelihood and extent to which the COVID-19 pandemic and its aftermath will negatively impact our tenants' and senior living community residents' ability to pay rent,

•Our ability to pay distributions to our shareholders and to sustain the amount of such distributions,

•The ability of Five Star, the manager of our managed senior living communities, to manage our senior living communities during the COVID-19 pandemic and to manage them profitably and maintain or increase our returns from our managed senior living communities, or to limit the extent of decreases in our returns during the COVID-19 pandemic and economic downturn,

•Whether the aging U.S. population and increasing life spans of seniors will increase the demand for senior living communities and other medical and healthcare related properties and healthcare services,

•Our ability to retain our existing tenants, attract new tenants and maintain or increase current rental rates on terms as favorable to us as our prior leases,

•The credit qualities of our tenants,

•Our ability to compete for tenancies and acquisitions effectively,

•Our ability to maintain and increase occupancy, revenues and NOI at our properties, or to limit their decline during the COVID-19 pandemic and economic downturn,

•Our expectations regarding the impact of the COVID-19 pandemic on our tenants, the healthcare sector and our financial condition,

•The expectation that, as a result of the COVID-19 pandemic, overall tenant retention levels may increase,

•Our application for additional funds that may be available under the CARES Act Provider Relief Fund may be denied and we may not receive any additional funding,

•Our acquisitions and sales of properties,

•Our closures of senior living communities,

•Our ability to raise debt or equity capital,

•Our ability to complete our target dispositions,

•The future availability of borrowings under our revolving credit facility,

•Our policies and plans regarding investments, financings and dispositions,

•Our ability to pay interest on and principal of our debt,

•Our ability to appropriately balance our use of debt and equity capital,

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•Our credit ratings,

•Our expectation that we benefit from our relationships with RMR LLC and RMR Inc.,

•Our qualification for taxation as a REIT, and

•Other matters.

Our actual results may differ materially from those contained in or implied by our forward-looking statements. Forward-looking statements involve known and unknown risks, uncertainties and other factors, some of which are beyond our control. Risks, uncertainties and other factors that could have a material adverse effect on our forward-looking statements and upon our business, results of operations, financial condition, FFO attributable to common shareholders, Normalized FFO attributable to common shareholders, NOI, cash flows, liquidity and prospects include, but are not limited to:

•The impact of the COVID-19 pandemic and its aftermath on us and our tenants' and operators' businesses,

•The impact of conditions in the economy and the capital markets on us and our tenants and operators,

•Compliance with, and changes to, federal, state and local laws and regulations, accounting rules, tax laws and similar matters,

•Limitations imposed on our business and our ability to satisfy complex rules in order for us to maintain our qualification for taxation as a REIT for U.S. federal income tax purposes,

•Competition within the healthcare and real estate industries, particularly in those markets in which our properties are located,

•Actual and potential conflicts of interest with our related parties, including our Managing Trustees, Five Star, RMR LLC, RMR Inc. and others affiliated with them, and

•Acts of terrorism, outbreaks of pandemics, including the COVID-19 pandemic, or other manmade or natural disasters beyond our control.

For example:

•If the severity of the COVID-19 pandemic continues for an extended period or if business activity and the economy fail to sufficiently improve if and when the substantial adverse impacts of the COVID-19 pandemic abate, we may realize sustained losses and liquidity challenges. Further, we may incur increased operating expenses, particularly at our senior living communities, for supplies and personnel to address the current COVID-19 pandemic and we may be prevented from accepting additional residents at certain of our senior living communities if we become restricted from doing so due to the COVID-19 pandemic. In addition, under the current economic conditions, our tenants and operators may not be able to profitably operate their businesses at our properties, our tenants may become unable or unwilling to pay rent owed to us, or the manager of our senior living communities may be unable to generate our minimum returns for sustained periods. Additionally, our ability to borrow under our credit facility is subject to us satisfying financial and other covenants, and if we default under our credit facility or other debt obligations due to the impact of the COVID-19 pandemic or otherwise, we may be required to repay our outstanding borrowings and other debt. Further, although we have taken steps to enhance our ability to maintain sufficient liquidity, unanticipated events, such as emergencies in addition to, or as an expansion of, the current impact of the COVID-19 pandemic, may require us to expend amounts not currently planned,

•The Conversion was a significant change in our business arrangements with Five Star and has resulted, and will likely continue to result in the future, in our realizing significantly different operating results from our senior living communities managed by Five Star, including increased variability in such results,

•If Five Star fails to provide quality services at our senior living communities, the NOI generated by these communities may be adversely affected,

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•Five Star, the manager of our managed senior living communities, has experienced significant operating and financial challenges, resulting from a number of factors, some of which are beyond Five Star's control, and which challenges directly impact our operating results from our managed senior living communities, including, but not limited to:

•The impact of the COVID-19 pandemic,

•Increases in Five Star's labor costs or in costs Five Star pays for goods and services,

•Competition within the senior living industry,

•Seniors delaying or forgoing moving into senior living communities or purchasing healthcare services that Five Star provides,

•The impact of changes in the economy and the capital markets on Five Star and its residents and other customers,

•Changes in Medicare or Medicaid policies and regulations or the possible future repeal, replacement or modification of these or other existing or proposed legislation or regulations,

•Increases in compliance costs,

•Continued efforts by third party payers to reduce healthcare costs,

•Increases in tort and insurance liability costs, and

•Five Star's exposure to litigation and regulatory and government proceedings due to the nature of its business.

•If Five Star's other operations are not profitable or if it does not operate our managed senior living communities successfully, it could become insolvent,

•We own a significant number of Five Star common shares and we expect to own these shares for the foreseeable future. However, we may sell some or all of our Five Star common shares, or our ownership interest in Five Star may otherwise be diluted in the future,

•Beginning in the second quarter of 2020, we reduced our quarterly cash distribution rate on our common shares to $0.01 per share ($0.04 per common share annually) due to the operating challenges and uncertain economic challenges as a result of the COVID-19 pandemic. Our distribution rate may be set and reset from time to time by our Board of Trustees. Our Board of Trustees will consider many factors when setting or resetting our distribution rate, including our historical and projected net income, Normalized FFO, our then current and expected needs and availability of cash to pay our obligations, distributions which we may be required to pay to maintain our qualification for taxation as a REIT, limitations in the agreements governing our debt and other factors deemed relevant by our Board of Trustees in its discretion. Further, our projected cash available for distribution may change and may vary from our expectations. Accordingly, future distributions to our shareholders may be increased or decreased and we cannot be sure as to the rate at which future distributions will be paid,

•Our ability to make future distributions to our shareholders and to make payments of principal and interest on our indebtedness depends upon a number of factors, including our future earnings, the capital costs we incur to lease and operate our properties and our working capital requirements. We may be unable to pay our debt obligations or to maintain our current rate of distributions on our common shares and future distributions may be reduced or eliminated,

•We plan to selectively sell certain properties from time to time to fund future acquisitions, subject to limitations on acquisitions in agreements governing our debt, and to strategically update, rebalance and reposition our investment portfolio, which we refer to as our capital recycling program. In addition, to reduce our leverage, we have sold properties and other assets and have identified additional properties to sell. We expect that the pace of our future asset sales will slow considerably because of current market conditions related to the COVID-19 pandemic. We cannot be sure we will sell any of these properties or what the terms or timing of any such sales may be. In addition, in the case of our capital recycling program, we cannot be sure that we will acquire replacement properties that improve the quality of our portfolio or our ability to increase our distributions to shareholders, and, we may sell properties at prices that are less than expected and less than their carrying values and therefore incur losses,

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•We expect to selectively close certain of our senior living communities from time to time to reduce future operating losses. We cannot be sure we will close any of these communities or what the terms or timing of any such closures may be. In addition, we cannot be sure that we will reduce operating losses or otherwise improve the quality of our portfolio through any such closures,

•Contingencies in our acquisition and sale agreements that we may enter may not be satisfied and any acquisitions and sales pursuant to such agreements and any related management arrangements we may expect to enter may not occur, may be delayed or the terms of such transactions or arrangements may change,

•The essential capital investments we are making at our senior living communities and our plan to invest additional capital into our senior living communities to better position them in their respective markets in order to increase our future returns may not be successful and may not achieve our expected results. Our senior living communities may not be competitive, despite these capital investments, or these capital investments may be delayed due to the COVID-19 pandemic,

•Our redevelopment projects may not be successful and may cost more or take longer to complete than we currently expect. In addition, we may not realize the returns we expect from these projects and we may incur losses from these projects,

•We may spend more for capital expenditures than we currently expect,

•Our existing joint venture and any other joint ventures that we may enter may not be successful,

•Our tenants may experience losses and default on their rent obligations to us,

•Some of our tenants may not renew expiring leases, and we may be unable to obtain new tenants to maintain or increase the historical occupancy rates of, or rents from, our properties,

•Our ability to grow our business and maintain or increase our distributions to shareholders depends in large part upon our ability to buy properties and arrange for their profitable operation or lease them for rents, less their property operating expenses, that exceed our capital costs. We may be unable to identify properties that we want to acquire, and are currently subject to limitations from making acquisitions under the agreements governing our debt, and we may fail to reach agreement with the sellers and complete the purchase of any properties we do want to acquire. In addition, any properties we may acquire may not provide us with rents or revenues less property operating costs that exceed our capital costs or achieve our expected returns. If our cash flows are reduced and our leverage increases, we may need to sell additional properties,

•Rents that we can charge at our properties may decline upon renewals or expirations because of changing market conditions or otherwise,

•We expect to enter into additional management arrangements with Five Star for additional senior living communities that we own or may acquire in the future. However, we cannot be sure that we will enter into any additional management or other arrangements with Five Star,

•Continued availability of borrowings under our revolving credit facility is subject to our satisfying certain financial covenants and other credit facility conditions that we may be unable to satisfy,

•Actual costs under our revolving credit facility or other floating rate debt will be higher than LIBOR plus a premium because of fees and expenses associated with such debt,

•The maximum borrowing availability under our revolving credit facility and our $200.0 million term loan may be increased to up to $2.4 billion on a combined basis in certain circumstances. However, increasing the maximum borrowing availability under our revolving credit facility and this term loan is subject to our obtaining additional commitments from lenders, which may not occur,

•We have the option to extend the maturity date of our revolving credit facility upon payment of a fee and meeting other conditions; however, the applicable conditions may not be met,

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•The premiums used to determine the interest rate payable on our revolving credit facility and term loan and the facility fee payable on our revolving credit facility are based on our credit ratings. In March 2020, our issuer credit rating was downgraded as a result of which our revolving credit facility and term loan premiums and facility fee increased,

•We may be unable to repay our debt obligations when they become due,

•We intend to conduct our business activities in a manner that will afford us reasonable access to capital for investment and financing activities. However, we may not succeed in this regard and we may not have reasonable access to capital,

•For the three months ended September 30, 2020, substantially all of our NOI was generated from properties where a majority of the revenues are derived from our tenants' and residents' private resources. This may imply that we will maintain or increase the percentage of our NOI generated from private resources at our senior living communities. However, our residents and patients may become unable to fund our charges with private resources and we may be required or may elect for business reasons to accept or pursue revenues from government sources, which could result in an increased part of our NOI and revenue being generated from government payments and our becoming more dependent on government payments,

•We and Five Star have made a voluntary disclosure to the OIG of certain inadequate documentation Five Star identified related to Medicare billing and other issues at a senior living community Five Star manages for us, and we have accrued a revenue reserve of $4.0 million for Medicare payments we expect to repay and recognized $2.2 million of estimated related penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, with respect to this matter. There can be no assurance that the OIG will agree with the amounts of repayments and penalties which we have estimated. Accordingly, the revenue reserve of $4.0 million and the other related penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, of $2.2 million may be inadequate to resolve these matters, and any increased amounts may be material,

•Circumstances that adversely affect the ability of seniors or their families to pay for our manager's and other operators' services, such as economic downturns, weak housing market conditions, higher levels of unemployment among our residents' family members, lower levels of consumer confidence, stock market volatility and/or changes in demographics generally could affect the profitability of our senior living communities,

•It is difficult to accurately estimate tenant space preparation costs. Our unspent leasing related obligations may cost more or less and may take longer to complete than we currently expect, and we may incur increasing amounts for these and similar purposes in the future,

•Our senior living communities are subject to extensive government regulation, licensure and oversight. We sometimes experience deficiencies in the operation of our senior living communities and some of our communities may be prohibited from admitting new residents or our license to continue operations at a community may be revoked. Also, operating deficiencies or a license revocation at one or more of our senior living communities may have an adverse impact on our ability to obtain licenses for or attract residents to our other communities,

•We believe that our relationships with our related parties, including Five Star, RMR LLC, RMR Inc., ABP Trust and others affiliated with them may benefit us and provide us with competitive advantages in operating and growing our business. However, the advantages we believe we may realize from these relationships may not materialize, and

•The business and property management agreements between us and RMR LLC have continuing 20 year terms. However, those agreements permit early termination in certain circumstances. Accordingly, we cannot be sure that these agreements will remain in effect for continuing 20 year terms.

Currently unexpected results could occur due to many different circumstances, some of which are beyond our control, such as the COVID-19 pandemic and its aftermath, new legislation or regulations affecting our business or the businesses of our tenants or operators, changes in our tenants' or operators' revenues or costs, worsening or lack of improvement of Five Star's financial condition or changes in our other tenants' financial conditions, deficiencies in operations by a tenant or manager of one or more of our senior living communities, changed Medicare or Medicaid rates, acts of terrorism, pandemics, natural disasters or changes in capital markets or the economy generally.

The information contained elsewhere in this Quarterly Report on Form 10-Q or in our other filings with the SEC, including under the caption “Risk Factors”, or incorporated herein or therein, identifies other important factors that could cause

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differences from our forward-looking statements. Our other filings with the SEC are available on the SEC's website at www.sec.gov.

You should not place undue reliance upon our forward-looking statements.

Except as required by law, we do not intend to update or change any forward-looking statements as a result of new information, future events or otherwise.

Statement Concerning Limited Liability

The Amended and Restated Declaration of Trust establishing Diversified Healthcare Trust, dated September 20, 1999, as amended and supplemented, as filed with the State Department of Assessments and Taxation of Maryland, provides that no trustee, officer, shareholder, employee or agent of Diversified Healthcare Trust shall be held to any personal liability, jointly or severally, for any obligation of, or claim against, Diversified Healthcare Trust. All persons dealing with Diversified Healthcare Trust in any way shall look only to the assets of Diversified Healthcare Trust for the payment of any sum or the performance of any obligation.

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PART II.   Other Information

Item 1A. Risk Factors.

Our business faces many risks, a number of which are described under the caption “Risk Factors” in our Annual Report. The COVID-19 pandemic may subject us to additional risks that are described below. The risks described in our Annual Report and below may not be the only risks we face. Other risks of which we are not yet aware, or that we currently believe are not material, may also materially and adversely impact our business operations or financial results. If any of the events or circumstances described in the risk factors contained in our Annual Report or described below occurs, our business, financial condition or results of operations could be adversely impacted and the value of an investment in our securities could decline. Investors and prospective investors should consider the risks described in our Annual Report and below, and the information contained under the caption “Warning Concerning Forward-Looking Statements” and elsewhere in this Quarterly Report on Form 10-Q before deciding whether to invest in our securities.

Our business, operations, financial results and liquidity have been materially and adversely impacted by the COVID-19 pandemic, and it is not known what the duration of this pandemic will be or what its ultimate adverse impact on us and our business will be, but we expect it will be substantial.

COVID-19 has been declared a pandemic by the World Health Organization, and in response to the outbreak, the U.S. Health and Human Services Secretary has declared a public health emergency in the United States. The COVID-19 pandemic has had a substantial adverse impact on the global economy, including the U.S. economy, and has resulted in a global economic recession. These conditions have materially and adversely impacted our and many of our tenants' and our senior living communities' manager's businesses, results of operations and liquidity.

Our senior living communities have experienced increased operating costs. These increased costs result from staffing, including overtime, particularly if a community experiences a reduction in available personnel due to illness or otherwise, the increased need and cost for supplies, including personal protective equipment, adopting enhanced disinfection measures and/or implementing quarantines for residents. In addition, our senior living communities are experiencing downward pressures on occupancy as a result of restrictions on allowing outside persons to enter senior living communities due to social distancing and other containment measures, limitations on prospective residents being able to visit our senior living communities and perceptions that senior living communities are unsafe during a pandemic or other widespread illness. The occupancy at our senior living communities has declined since the start of the pandemic and we expect occupancy to continue to decline as a result of the pandemic and economic downturn, and the costs for operating those senior living communities have increased and we expect they may continue to increase during the COVID-19 pandemic and its aftermath, and these declines in occupancy and increases in operating costs may be significant. Those conditions would reduce the returns we realize from our senior living communities and the fees earned by the manager of our senior living communities, and these conditions may result in residents at our senior living communities being unable or unwilling to pay us rent and resident fees. Further, our manager and tenants may be limited in operating our senior living communities if they are unable to obtain the necessary staffing and supplies, such as a result of illness of staff, shortages of supplies due to supply chain or production challenges, or for other reasons. Additionally, downturns or stagnation in the U.S. housing market as a result of an economic downturn could adversely affect the ability, or perceived ability, of seniors to afford the resident fees and services at our senior living communities as prospective residents may use the proceeds from the sale of their homes to cover the cost of such fees.

In addition, economic downturns and recessions in the United States have historically negatively impacted the commercial office real estate market, including increased tenant defaults, decreased occupancies and reduced rental rates. The current economic conditions have had, and we expect that they will continue to have, similar negative impacts on our Office Portfolio and we expect that the extent of those negative consequences will depend to a large extent on the duration and depth of the economic recession in the United States and the strength and sustainability of any economic recovery that may follow.

We cannot predict the extent and duration of the COVID-19 pandemic or the severity and duration of its economic impact, but we expect it will be substantial.

Further, the extent and strength of any economic recovery after the COVID-19 pandemic ends or otherwise are uncertain and subject to various factors and conditions. Our business, operations and financial position may continue to be negatively impacted after the COVID-19 pandemic ends and may remain at depressed levels compared to prior to the outbreak of the COVID-19 pandemic and those conditions may continue for an extended period.

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We have taken several actions in an attempt to address the operating and financial impact from the COVID-19 pandemic, and we continue to assess and explore other actions, but those actions and plans may not be sufficient to avoid continued and potentially increased substantial harm to our business, operations and financial condition.

We have taken several actions in an attempt to address the operating and financial impact from the COVID-19 pandemic, including:

•we reduced our quarterly cash distribution rate on our common shares to $0.01 per share payable;

•we amended certain financial covenants under our credit and term loan agreements through June 30, 2021 in order to provide us with additional flexibility;

•we have been in regular, frequent contact with our senior living communities' manager to adopt measures to minimize losses, preserve liquidity and maintain operations; and

•we have communicated with many of our medical office, life science and other tenants regarding their operation of or at our properties in the current challenging economic conditions, and we have agreed to provide deferrals of approximately $2.2 million of rent owed to us that are generally required to be repaid in installments beginning later this year.

There can be no assurance that these actions or others that we may take will be successful or that they will enable us to maintain sufficient liquidity and withstand the current economic challenges.

We recently reduced our quarterly cash distribution rate on our common shares to $0.01 per share; future distributions may remain at this level for an indefinite period or be eliminated and the form of payment could change.

Beginning in the second quarter of 2020, we reduced our quarterly cash distributions on our common shares to $0.01 per share. We currently intend to continue to make quarterly distributions to our shareholders at this rate for at least the Amendment Period, subject to applicable REIT tax requirements. However:

•our ability to make or sustain the rate of distributions may continue to be adversely affected by the negative impact of the COVID-19 pandemic and its aftermath on our business, results of operations and liquidity;

•our making of distributions is subject to restrictions contained in our credit and term loan agreements, including being limited to amounts required to maintain our qualification for taxation as a REIT and $0.01 per common share per quarter during the Amendment Period, and may be subject to restrictions in future debt obligations we may incur; during the continuance of any event of default under our credit and term loan agreements, we may be limited or in some cases prohibited from making distributions to our shareholders; and

•the timing and amount of any distributions will be determined at the discretion of our Board of Trustees and will depend on various factors that our Board of Trustees deems relevant, including our historical and projected net income, Normalized FFO, our then current and expected needs and availability of cash to pay our obligations, distributions which we may be required to pay to maintain our qualification for taxation as a REIT, limitations in the agreements governing our debt and other factors deemed relevant by our Board of Trustees in its discretion.

For these reasons, among others, our distribution rate may not increase for an indefinite period and could be eliminated.

In order to preserve liquidity, we may elect to pay distributions to our shareholders, in part, in a form other than cash, such as issuing additional common shares of ours to our shareholders, as permitted by the applicable tax rules.

Our investment activities, other than capital expenditures at our existing properties, have been significantly curtailed and we expect that to continue for an indefinite period.

We are not actively pursuing acquisitions at this time. In addition, we have reduced our expectations for capital spending significantly. In addition, our credit and term loan agreements limit our ability to make acquisitions. As a result, we will be limited in pursuing investments, which may limit our ability to grow and to act upon opportunities we believe would benefit us.

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Further, to the extent we defer capital expenditures, we may be required to make increased capital expenditures in later periods as a result and some of the expenditures may be greater in scope and amount than they may have been if made sooner.

We expect that the sale of assets that we previously announced an intention to sell will be delayed and could be changed or abandoned.

We expect that the sales of some of our assets that we had previously identified for sale will be delayed until 2021 as a result of current market conditions. However, any sales of these assets may be delayed beyond our current expectations, they may not occur or, if they do occur, they may be sold at prices less than previously expected and we may realize losses from those assets. Our ability to sell these assets, and the prices we receive upon a sale, may continue to be affected by the impact of the COVID-19 pandemic, and we may be unable to execute our strategy.

Some of our tenants have requested relief from their obligations to pay rent due to us as a result of market disruptions due to the COVID-19 pandemic and we expect to receive additional similar requests in the future; we have provided certain limited relief in response to these requests and may determine to grant additional relief in the future if we determine it prudent or appropriate to do so.

The current economic conditions resulting from the COVID-19 pandemic have negatively impacted our tenants' businesses, operations and liquidity. As a result of market disruptions due to the COVID-19 pandemic, some of our tenants have requested relief from their obligations to pay rent due to us. As of November 2, 2020, we granted requests for certain of our tenants to defer rent payments totaling $2.2 million. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. We expect to receive additional similar requests in the future, and we may determine to grant additional relief in the future, which may vary from the type of relief we have granted to date, and could include more substantial relief, if we determine it prudent or appropriate to do so. If conditions do not sufficiently and sustainably improve for these tenants, they may be unable to pay deferred or future rent owed to us when due or otherwise. In addition, if our tenants and senior living communities' manager are unable to continue as going concerns as a result of the current economic conditions or otherwise, we will experience a reduction in rents and returns received and we may be unable to find suitable replacement tenants and managers for an extended period or at all and the terms of our agreements with those replacement tenants and managers may not be as favorable to us as the terms of our agreements with our existing tenants and manager.

We may need waivers or amendments from our lenders in order to avoid defaulting under our revolving credit facility.

We may need to obtain waivers or amendments from our lenders under our revolving credit facility in the future in order to avoid failing to satisfy certain financial covenants under our credit and term loan agreements, but our lenders are not required to grant any such waivers and may determine not to do so. If we fail to receive any required waiver, we may default under our credit and term loan agreements and the lenders could terminate the credit facility and require us to pay our then outstanding borrowings under our credit facility. Any future waiver we may obtain may impose restrictions, which may limit our ability to pay distributions to our shareholders, make investments that we believe we should make and could reduce our ability to pursue business opportunities, grow our business and improve our operating results.

We do not expect to reduce our debt leverage in accordance with the timing contemplated by our previous plans and our debt leverage may remain at or above current levels for an indefinite period.

We previously announced an intention to reduce our debt leverage from proceeds from the planned sales of certain of our assets. As noted elsewhere in this Quarterly Report on Form 10-Q, we expect that the sale of some of these assets will be delayed, they may not occur and, if they do occur, they may be sold at prices less than previously expected. We expect the delay in these sales will also delay our ability to reduce our debt leverage. Further, if we realize a lower amount of proceeds from any asset sales than we previously expected, any corresponding reduction in our debt leverage would be similarly reduced. In addition, we may elect to incur additional debt in order to try to ensure that we have sufficient liquidity to manage through the current economic conditions and any extended economic downturn or recession that may result.

The COVID-19 pandemic may have significant impacts on workplace practices and those changes could be detrimental to our business.

Temporary closures of businesses and stay in place orders and the resulting remote working arrangements for nonessential personnel in response to the COVID-19 pandemic may result in long-term changed work practices that could negatively impact us and our business. For example, the increased adoption of and familiarity with remote work practices could result in decreased demand for office space, which could materially adversely impact our Office Portfolio and the values of our office properties. In addition, certain of our tenants' businesses depend on people gathering in close proximity, including fitness

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centers, among others. To the extent that social distancing practices that have been adopted in response to the COVID-19 pandemic become sustained practices, those tenants' businesses may be materially adversely impacted, which will reduce their ability to pay us rent, increase the likelihood they will default in paying us rent and likely reduce the value of those properties.

The high levels of infected COVID-19 patients and deaths at senior living communities and resulting negative publicity may have a long term significant detrimental impact on the senior living industry, including us, even if our senior living communities do not experience similar levels of COVID-19 infections and deaths as others in the industry.

COVID-19 has proven to be particularly harmful to seniors and persons with other pre-existing health conditions. If the senior living industry continues to experience high levels of residents infected with COVID-19 and related deaths, and news accounts emphasize these experiences, seniors may increasingly delay or forgo moving into senior living communities or using other services provided by senior living operators. These trends could be realized across the senior living industry and not discriminate among owners and operators that have higher or lower levels of residents experiencing COVID-19 infections and related deaths. As a result, our operating results from our senior living communities, and the values of those communities, may experience a long term significant detrimental impact.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

    Issuer purchases of equity securities. The following table provides information about our purchases of our equity securities during the quarter ended September 30, 2020:

Calendar Month	Number of Shares Purchased(1)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
September 2020	42,180	$	3.38	—	$	—
Total	42,180	$	3.38	—	$	—

(1) These common share withholdings and purchases were made to satisfy tax withholding and payment obligations of our officers and certain other employees of RMR LLC in connection with the vesting of awards of our common shares. We withheld and purchased these shares at their fair market value based upon the trading price of our common shares at the close of trading on Nasdaq on the purchase date.

Item 6. Exhibits.

Exhibit Number	Description
3.1	Composite Copy of Articles of Amendment and Restatement, dated September 20, 1999, as amended to date. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020.)
3.2	Articles Supplementary, dated May 11, 2000. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2000.)
3.3	Articles Supplementary, dated June 30, 2017. (Incorporated by reference to the Company's Current Report on Form 8-K filed June 30, 2017.)
3.4	Articles Supplementary, dated May 19, 2020. (Incorporated by reference to the Company's Current Report on Form 8-K filed May 20, 2020.)
3.5	Amended and Restated Bylaws of the Company, adopted January 1, 2020. (Incorporated by reference to the Company's Current Report on Form 8-K filed January 2, 2020.)
4.1	Form of Common Share Certificate. (Incorporated by reference to the Company's Current Report on Form 8-K filed January 2, 2020.)
4.2	Indenture, dated as of December 20, 2001, between the Company and State Street Bank and Trust Company. (Incorporated by reference to the Company's Registration Statement on Form S-3, File No. 333-76588.)
4.3	Supplemental Indenture No. 4, dated as of April 9, 2010, between the Company and U.S. Bank National Association, related to 6.75% Senior Notes due 2020, including form thereof. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2010.)

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4.4	Supplemental Indenture No. 6, dated as of December 8, 2011, between the Company and U.S. Bank National Association, related to 6.75% Senior Notes due 2021, including form thereof. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2011.)
4.5	Supplemental Indenture No. 7, dated as of July 20, 2012, between the Company and U.S. Bank National Association, related to 5.625% Senior Notes due 2042, including form thereof (Incorporated by reference to the Company's Registration Statement on Form 8-A filed July 20, 2012.)
4.6	Supplemental Indenture No. 9, dated as of April 28, 2014, between the Company and U.S. Bank National Association, related to 4.75% Senior Notes due 2024, including form thereof. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2014.)
4.7	Indenture, dated as of February 18, 2016, between the Company and U.S. Bank National Association. (Incorporated by reference to the Company's Current Report on Form 8-K filed February 18, 2016.)
4.8	First Supplemental Indenture, dated as of February 18, 2016, between the Company and U.S. Bank National Association, related to 6.25% Senior Notes due 2046, including form thereof. (Incorporated by reference to the Company's Current Report on Form 8-K filed February 18, 2016.)
4.9	Second Supplemental Indenture, dated as of February 12, 2018, between the Company and U.S. Bank National Association, related to 4.75% Senior Notes due 2028, including form thereof. (Incorporated by reference to the Company's Annual Report on Form 10-K for the year ended December 31, 2017.)
4.10	Third Supplemental Indenture, dated as of June 2, 2020, among the Company, certain subsidiaries of the Company named therein as guarantors and U.S. Bank, National Association, related to 9.750% Senior Notes due 2025, including form thereof. (Incorporated by reference to the Company's Current Report on Form 8-K filed June 5, 2020.)
4.11	Registration Rights and Lock-Up Agreement, dated as of June 5, 2015, among the Company, ABP Trust (f/k/a Reit Management & Research Trust) and Adam D. Portnoy. (Incorporated by reference to the Company's Current Report on Form 8-K filed June 8, 2015.)
10.1	Form of Share Award Agreement. (Filed herewith.)
22.1	List of Subsidiary Guarantors. (Incorporated by reference to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2020.)
31.1	Rule 13a-14(a) Certification. (Filed herewith.)
31.2	Rule 13a-14(a) Certification. (Filed herewith.)
31.3	Rule 13a-14(a) Certification. (Filed herewith.)
31.4	Rule 13a-14(a) Certification. (Filed herewith.)
32.1	Section 1350 Certification. (Furnished herewith.)
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document. (Filed herewith.)
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document. (Filed herewith.)
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document. (Filed herewith.)
101.LAB	XBRL Taxonomy Extension Label Linkbase Document. (Filed herewith.)
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document. (Filed herewith.)
104	Cover Page Interactive Data File. (Formatted as Inline XBRL and contained in Exhibit 101.)

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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.

	DIVERSIFIED HEALTHCARE TRUST
	By:	/s/ Jennifer F. (Francis) Mintzer
		Jennifer F. (Francis) Mintzer
		President and Chief Operating Officer
Dated: November 5, 2020
	By:	/s/ Richard W. Siedel, Jr.
		Richard W. Siedel, Jr.
		Chief Financial Officer and Treasurer
		(principal financial and accounting officer)
Dated: November 5, 2020

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EX-10.1

Exhibit 10.1

FORM OF

DIVERSIFIED HEALTHCARE TRUST

Share Award Agreement

This Share Award Agreement (this “Agreement”) is made as of «DATE», 2020, between «NAME» (the “Recipient”) and Diversified Healthcare Trust (the “Company”).

In consideration of the mutual promises and covenants contained in this Agreement, and for other valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

1. Grant of Shares. Subject to the terms and conditions hereinafter set forth and the terms and conditions of the Diversified Healthcare Trust 2012 Equity Compensation Plan, as it may be amended from time to time (the “Plan”), the Company hereby grants to the Recipient, effective as of the date of this Agreement, «NUMBER» of its common shares of beneficial interest, par value $.01 per share (the “Common Shares”). The shares so granted are hereinafter referred to as the “Shares,” which term shall also include any shares of the Company issued to the Recipient by virtue of his or her ownership of the Shares, by share dividend, share split or combination, recapitalization or otherwise.

2. Vesting; Forfeiture of Shares.

(a)    Subject to Sections 2(b) and 2(c) hereof, the Shares shall vest one-fifth of the total number of Shares as of the date hereof and as to a further one-fifth of such total number of Shares on each anniversary of the date hereof for the next four calendar years. Any Shares not vested as of any date are herein referred to as “Unvested Shares.”

(b)    Subject to Section 2(c) hereof, at the option of the Company, in the event the Recipient ceases to render significant services, whether as an employee or otherwise, to (i) the Company, (ii) the entity which is the manager or shared services provider to the Company or an entity controlled by, under common control with or controlling such entity (collectively, the “Manager”), or (iii) an affiliate of the Company (which shall be deemed for such purpose to include any other entity to which the Manager is the manager or shared services provider), all or any portion of the Unvested Shares shall be forfeited by the Recipient on or after the date the Recipient ceases to render all such services, as determined by the Company. The Company may exercise such option by delivering or mailing to the Recipient (or his or her estate), at any time after the Recipient has ceased to render such services, a written notice of exercise of such option. Such notice shall specify the number of Unvested Shares to be forfeited.

(c)    Notwithstanding anything in this Agreement to the contrary, immediately upon the occurrence of an Acceleration Event (as defined below), all of the Unvested Shares shall vest and any forfeiture or other rights of the Company described in Section 2(b) shall lapse in their entirety, and such vesting and lapse of forfeiture or other Company rights shall also immediately apply to each other Common Share previously granted to the Recipient which then remains subject to comparable restrictions and rights. For purposes of this Section 2(c), an Acceleration Event shall be deemed to occur immediately upon the occurrence of any of the following events: a Change in Control, a Termination Event (as each such term is defined in Exhibit A hereto) or the death of the Recipient.

3. Legends. Vested and Unvested Shares granted under this Agreement may bear or contain, as applicable, such legends and notations as may be required by the Plan or the Company’s declaration of trust, any applicable supplement thereto or bylaws, each as in effect from time to time, or as the Company may otherwise determine appropriate.

Promptly following the request of the Recipient with respect to any Shares (or any other Common Shares previously granted to the Recipient), the Company shall take, at its sole cost and expense, all such actions as may be required to permit the Recipient to sell such shares including, as applicable and without limitation, providing to the Company’s transfer agent certificates of officers of the Company, and opinions of counsel and/or filing an appropriate registration statement, and taking all such other actions as may be required to remove the legends set forth above with respect to transfer and vesting restrictions from the certificates evidencing such shares and, if applicable, from the share books and records of the Company. The Company shall reimburse the Recipient, promptly upon the receipt of a request for payment, for all expenses (including legal expenses) reasonably incurred by the Recipient in connection with the enforcement of the Recipient’s rights under this paragraph.

4. Tax Withholding. To the extent required by law, the Company or the Manager shall withhold or cause to be withheld income and other taxes incurred by the Recipient by reason of a grant of Shares, and the Recipient agrees that he or she shall, upon the request of the Company or the Manager, pay to the Company or to the Manager an amount sufficient to satisfy his or her tax withholding obligations from time to time (including as Shares become vested).

5. Miscellaneous.

(a)    Amendments. Neither this Agreement nor any provision hereof may be changed or modified except by an agreement in writing executed by the Recipient and the Company; provided, however, that any change or modification that does not adversely affect the rights hereunder of the Recipient, as they may exist immediately prior to the effective date of such change or modification, may be adopted by the Company without an agreement in writing executed by the Recipient, and the Company shall give the Recipient written notice of such change or modification reasonably promptly following the adoption of such change or modification.

(b)    Binding Effect of the Agreement. This Agreement shall inure to the benefit of, and be binding upon , the Company, the Recipient and their respective estates, heirs, executors, transferees, successors, assigns and legal representatives.

(c)    Provisions Separable. In the event that any of the terms of this Agreement shall be or become or is declared to be illegal or unenforceable by any court or other authority of competent jurisdiction, such terms shall be null and void and shall be deemed deleted from this Agreement, and all the remaining terms of this Agreement shall remain in full force and effect.

(d)    Notices. Any notice in connection with this Agreement shall be deemed to have been properly delivered if it is in writing and is delivered by hand or by facsimile or sent by registered certified mail, postage prepaid, to the party addressed as follows, unless another address has been substituted by notice so given:

To the Recipient:        To the Recipient’s address as set forth on the signature page hereof.

To the Company:        Diversified Healthcare Trust

Two Newton Place

255 Washington Street, Suite 300

Newton, MA 02458

Attn: Secretary

(e)    Construction. The headings and subheadings of this Agreement have been inserted for convenience only, and shall not affect the construction of the provisions hereof. All references to sections of this Agreement shall be deemed to refer as well to all subsections which form a part of such section.

(f)    Employment Agreement. This Agreement shall not be construed as an agreement by the Company, the Manager or any affiliate of the Company or the Manager to employ the Recipient, nor is the Company, the Manager or any affiliate of the Company or the Manager obligated to continue employing the Recipient by reason of this Agreement or the grant of the Shares to the Recipient hereunder.

(g)    Applicable Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Maryland, without giving effect to the principles of conflicts of law of such state.

(h)    Binding Arbitration. Any disputes regarding this Agreement, the granting or vesting of any shares of the Company and/or any related matters shall be settled by binding arbitration in accordance with any Mutual Agreement to Resolve Disputes and Arbitrate Claims between the Recipient and the Manager. In the absence of such an agreement, any such claims or disputes shall be resolved through binding arbitration before one arbitrator conducted under the rules of JAMS in Boston, Massachusetts.

2

IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or caused this Agreement to be executed under seal, as of the date first above written.

DIVERSIFIED HEALTHCARE TRUST

By: ______________________________________

Name: Richard W. Siedel, Jr.

Title: Chief Financial Officer and Treasurer

RECIPIENT:

__________________________________________

«NAME»

«ADDRESS»

«CITY», «ST» «ZIP»

3

Exhibit A

A “Change in Control” shall be deemed to have occurred if any of the events set forth in any one of the following paragraphs shall have occurred:

(a) any Person is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing 50% or more of either the then outstanding common shares of beneficial interest of the Company or the combined voting power of the Company’s then outstanding securities, excluding any Person who becomes such a Beneficial Owner in connection with a transaction described in paragraph (c)(i) below;

(b) the following individuals cease for any reason to constitute a majority of the number of Trustees then serving: individuals who, on the date of the Agreement, constitute the Board and any new Trustee (other than a Trustee whose initial assumption of office is in connection with an actual or threatened election contest, including but not limited to a consent solicitation, relating to the election of Trustees) whose appointment or election by the Board or nomination for election by the Company’s shareholders was approved or recommended by a vote of at least two-thirds (2/3) of the Trustees then in office who either were Trustees on the date of the Agreement or whose appointment, election or nomination for election was previously so approved or recommended;

(c) there is consummated a merger or consolidation of the Company or any direct or indirect subsidiary of the Company with any other entity, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior to such merger or consolidation continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or any parent thereof) at least 50% of the combined voting power of the securities of the Company or such surviving entity or any parent thereof outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation effected to implement a recapitalization of the Company (or similar transaction) in which no Person is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company (not including in the securities Beneficially Owned by such Person any securities acquired directly from the Company or its Affiliates) representing 50% or more of the combined voting power of the Company’s then outstanding securities; or

(d) the shareholders of the Company approve a plan of complete liquidation or dissolution of the Company or there is consummated an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets, other than a sale or disposition by the Company of all or substantially all of the Company’s assets to an entity, at least 50% of the combined voting power of the voting securities of which are owned by shareholders of the Company in substantially the same proportions as their ownership of the Company immediately prior to such sale.

A “Termination Event” shall occur if The RMR Group LLC (or any entity controlled by, under common control with or controlling The RMR Group LLC) ceases to be the manager or shared services provider to the Company.

For purposes of the definitions set forth on this Exhibit A, the following definitions shall apply, with capitalized terms used but not defined in this Exhibit A having the meaning set forth in the Plan:

“Affiliate” shall have the meaning set forth in Rule 12b-2 promulgated under Section 12 of the Exchange Act.

“Agreement” shall mean the Share Award Agreement to which this Exhibit A is attached.

“Beneficial Owner” shall have the meaning set forth in Rule 13d-3 under the Exchange Act.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

“Person” shall have the meaning given in Section 3(a)(9) of the Exchange Act, as modified and used in Sections 13(d) and 14(d) thereof, except that such term shall not include (i) the Company or any of its subsidiaries, (ii) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or any of its Affiliates, (iii) an underwriter temporarily holding securities pursuant to an offering of such securities and (iv) a corporation owned, directly or indirectly, by the shareholders of the Company in substantially the same proportions as their ownership of shares of the Company.

“Trustee” is a member of the Board of Trustees of the Company.

4

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a)

I, Adam D. Portnoy, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Diversified Healthcare Trust;

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.

Date: November 5, 2020	/s/ Adam D. Portnoy
	Adam D. Portnoy
	Managing Trustee

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a)

I, Jennifer B. Clark, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Diversified Healthcare Trust;

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.

Date: November 5, 2020	/s/ Jennifer B. Clark
	Jennifer B. Clark
	Managing Trustee

EX-31.3

Exhibit 31.3

CERTIFICATION PURSUANT TO EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a)

I, Jennifer F. (Francis) Mintzer, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Diversified Healthcare Trust;

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.

Date: November 5, 2020	/s/ Jennifer F. (Francis) Mintzer
	Jennifer F. (Francis) Mintzer
	President and Chief Operating Officer

EX-31.4

Exhibit 31.4

CERTIFICATION PURSUANT TO EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a)

I, Richard W. Siedel, Jr., certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Diversified Healthcare Trust;

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.

Date: November 5, 2020	/s/ Richard W. Siedel, Jr.
	Richard W. Siedel, Jr.
	Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SEC. 1350

    In connection with the filing by Diversified Healthcare Trust (the “Company”) of the Quarterly Report on Form 10-Q for the period ended September 30, 2020 (the “Report”), each of the undersigned hereby certifies, to the best of his or her knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Adam D. Portnoy	/s/ Jennifer F. (Francis) Mintzer
Adam D. Portnoy	Jennifer F. (Francis) Mintzer
Managing Trustee	President and Chief Operating Officer
/s/ Jennifer B. Clark	/s/ Richard W. Siedel, Jr.
Jennifer B. Clark	Richard W. Siedel, Jr.
Managing Trustee	Chief Financial Officer and Treasurer

Date: November 5, 2020

XML

Cover - shares	9 Months Ended
	Sep. 30, 2020	Nov. 02, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	1-15319
Entity Registrant Name	DIVERSIFIED HEALTHCARE TRUST
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	04-3445278
Entity Address, Address Line One	Two Newton Place, 255 Washington Street, Suite 300,
Entity Address, City or Town	Newton
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02458-1634
City Area Code	617
Local Phone Number	796 - 8350
Title of 12(b) Security	Common Shares of Beneficial Interest
Trading Symbol	DHC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		238,268,478
Entity Central Index Key	0001075415
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Senior Notes Due 2042
Entity Information [Line Items]
Title of 12(b) Security	5.625% Senior Notes due 2042
Trading Symbol	DHCNI
Security Exchange Name	NASDAQ
Senior Notes Due 2046
Entity Information [Line Items]
Title of 12(b) Security	6.25% Senior Notes due 2046
Trading Symbol	DHCNL
Security Exchange Name	NASDAQ

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020		Dec. 31, 2019
Real estate properties:
Land	$ 792,343		$ 793,123
Buildings and improvements	6,579,388		6,668,463
Total real estate properties, gross	7,371,731		7,461,586
Accumulated depreciation	(1,651,864)		(1,570,801)
Total real estate properties, net	5,719,867		5,890,785
Assets of properties held for sale	164,363		209,570
Cash and cash equivalents	82,241		37,357
Restricted cash	16,134	[1]	14,867
Acquired real estate leases and other intangible assets, net	298,429		337,875
Other assets, net	254,084		163,372
Total assets	6,535,118		6,653,826
Liabilities and Equity
Unsecured revolving credit facility	0		537,500
Unsecured term loans, net	198,913		448,741
Senior unsecured notes, net	2,606,550		1,820,681
Secured debt and finance leases, net	692,385		694,739
Liabilities of properties held for sale	7,834		6,758
Accrued interest	53,681		24,060
Assumed real estate lease obligations, net	70,046		76,705
Other liabilities	264,003		167,592
Total liabilities	3,893,412		3,776,776
Commitments and contingencies
Equity attributable to common shareholders:
Common shares of beneficial interest, $.01 par value: 300,000,000 shares authorized, 238,268,478 and 237,897,163 shares issued and outstanding, respectively	2,383		2,379
Additional paid in capital	4,613,501		4,612,511
Cumulative net income	1,929,337		2,052,562
Cumulative distributions	(4,031,177)		(3,930,933)
Total equity attributable to common shareholders	2,514,044		2,736,519
Noncontrolling interest:
Total equity attributable to noncontrolling interest	127,662		140,531
Total equity	2,641,706		2,877,050
Total liabilities and equity	$ 6,535,118		$ 6,653,826

[1] Restricted cash consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties and cash held for the operations of one of our life science properties that is owned in a joint venture arrangement in which we own a 55% equity interest.

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares of beneficial interest, shares authorized (in shares)	300,000,000	300,000,000
Common shares of beneficial interest, shares issued (in shares)	238,268,478	237,897,163
Common shares of beneficial interest, shares outstanding (in shares)	238,268,478	237,897,163

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 394,339	$ 255,827	$ 1,247,117	$ 784,116
Expenses:
Property operating expenses	315,650	125,083	934,150	362,498
Depreciation and amortization	67,211	73,368	204,466	219,522
General and administrative	6,988	9,604	23,132	28,287
Acquisition and certain other transaction related costs	53	2,492	803	11,209
Impairment of assets	64,202	33,099	106,611	41,518
Total expenses	454,104	243,646	1,269,162	663,034
(Loss) gain on sale of properties	(211)	4,183	2,403	21,893
Dividend income	0	0	0	1,846
Gains and losses on equity securities, net	12,510	40	14,541	(41,476)
Interest and other income	134	238	8,008	590
Interest expense (including net amortization of debt premiums, discounts and issuance costs of $2,448, $1,421, $5,574 and $4,592, respectively)	(58,091)	(44,817)	(143,715)	(136,840)
Gain on lease termination	0	0	22,896	0
Loss on early extinguishment of debt	0	0	(427)	(17)
Loss from continuing operations before income tax (expense) benefit and equity in earnings of an investee	(105,423)	(28,175)	(118,339)	(32,922)
Income tax (expense) benefit	(365)	146	(1,048)	47
Equity in earnings of an investee	0	83	0	617
Net income (loss)	(105,788)	(27,946)	(119,387)	(32,258)
Net income attributable to noncontrolling interest	(1,100)	(1,444)	(3,838)	(4,279)
Net income (loss) attributable to common shareholders	(106,888)	(29,390)	(123,225)	(36,537)
Other comprehensive (loss) income:
Equity in unrealized (loss) gain of an investee	0	(46)	0	91
Other comprehensive (loss) income	0	(46)	0	91
Comprehensive loss	(105,788)	(27,992)	(119,387)	(32,167)
Comprehensive income attributable to noncontrolling interest	(1,100)	(1,444)	(3,838)	(4,279)
Comprehensive loss attributable to common shareholders	$ (106,888)	$ (29,436)	$ (123,225)	$ (36,446)
Weighted average common shares outstanding (basic) (in shares)	237,752	237,608	237,707	237,585
Weighted average common shares outstanding (diluted) (in shares)	237,752	237,608	237,707	237,585
Per common share amounts (basic and diluted):
Net loss attributable to common shareholders (in dollars per share)	$ (0.45)	$ (0.12)	$ (0.52)	$ (0.15)
Rental income
Revenues:
Revenues	$ 104,238	$ 148,011	$ 320,943	$ 459,349
Residents fees and services
Revenues:
Revenues	$ 290,101	$ 107,816	$ 926,174	$ 324,767

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Amortization of debt issuance costs and debt discounts and premiums	$ 2,448	$ 1,421	$ 5,574	$ 4,592

XML

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional Paid In Capital	Cumulative Net Income	Cumulative Other Comprehensive Income (Loss)	Cumulative Distributions	Total Equity Attributable to Common Shareholders	Total Equity Attributable to Noncontrolling Interest	Five Star	Five Star Shareholders	Five Star Shareholders Cumulative Distributions	Five Star Shareholders Total Equity Attributable to Common Shareholders
Beginning balance (in shares) at Dec. 31, 2018		237,729,900
Beginning balance at Dec. 31, 2018	$ 3,179,870	$ 2,377	$ 4,611,419	$ 2,140,796	$ (266)	$ (3,731,214)	$ 3,023,112	$ 156,758
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	31,504			30,082			30,082	1,422
Other comprehensive (loss) income	66				66		66
Distributions	(92,714)					(92,714)	(92,714)
Share grants	215		215				215
Distributions to noncontrolling interest	(5,503)							(5,503)
Ending balance (in shares) at Mar. 31, 2019		237,729,900
Ending balance at Mar. 31, 2019	3,113,438	$ 2,377	4,611,634	2,170,878	(200)	(3,823,928)	2,960,761	152,677
Beginning balance (in shares) at Dec. 31, 2018		237,729,900
Beginning balance at Dec. 31, 2018	3,179,870	$ 2,377	4,611,419	2,140,796	(266)	(3,731,214)	3,023,112	156,758
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(32,258)
Other comprehensive (loss) income	91
Ending balance (in shares) at Sep. 30, 2019		237,900,277
Ending balance at Sep. 30, 2019	2,968,222	$ 2,379	4,612,264	2,104,259	(175)	(3,895,248)	2,823,479	144,743
Beginning balance (in shares) at Mar. 31, 2019		237,729,900
Beginning balance at Mar. 31, 2019	3,113,438	$ 2,377	4,611,634	2,170,878	(200)	(3,823,928)	2,960,761	152,677
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(35,816)			(37,229)			(37,229)	1,413
Other comprehensive (loss) income	71				71		71
Distributions	(35,659)					(35,659)	(35,659)
Share grants (in shares)		15,000
Share grants	395		395				395
Share repurchases (in shares)		(3,529)
Share repurchases	(33)		(33)				(33)
Share forfeitures (in shares)		(610)
Share forfeitures	(3)		(3)				(3)
Distributions to noncontrolling interest	(5,684)							(5,684)
Ending balance (in shares) at Jun. 30, 2019		237,740,761
Ending balance at Jun. 30, 2019	3,036,709	$ 2,377	4,611,993	2,133,649	(129)	(3,859,587)	2,888,303	148,406
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(27,946)			(29,390)			(29,390)	1,444
Other comprehensive (loss) income	(46)				(46)		(46)
Distributions	(35,661)					(35,661)	(35,661)
Share grants (in shares)		187,500
Share grants	532	$ 2	530				532
Share repurchases (in shares)		(27,984)
Share repurchases	(259)		(259)				(259)
Distributions to noncontrolling interest	(5,107)							(5,107)
Ending balance (in shares) at Sep. 30, 2019		237,900,277
Ending balance at Sep. 30, 2019	$ 2,968,222	$ 2,379	4,612,264	2,104,259	$ (175)	(3,895,248)	2,823,479	144,743
Beginning balance (in shares) at Dec. 31, 2019	237,897,163	237,897,163							10,268,158	16,118,849
Beginning balance at Dec. 31, 2019	$ 2,877,050	$ 2,379	4,612,511	2,052,562		(3,930,933)	2,736,519	140,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	11,143			9,735			9,735	1,408
Distributions	(35,684)					(35,684)	(35,684)
Distribution to common shareholders of the right to receive Five Star Senior Living Inc. common stock										$ (59,801)	$ (59,801)	$ (59,801)
Share grants	249		249				249
Share repurchases (in shares)		(3,438)
Share repurchases	(21)		(21)				(21)
Distributions to noncontrolling interest	(5,767)							(5,767)
Ending balance (in shares) at Mar. 31, 2020		237,893,725
Ending balance at Mar. 31, 2020	$ 2,787,169	$ 2,379	4,612,739	2,062,297		(4,026,418)	2,650,997	136,172
Beginning balance (in shares) at Dec. 31, 2019	237,897,163	237,897,163							10,268,158	16,118,849
Beginning balance at Dec. 31, 2019	$ 2,877,050	$ 2,379	4,612,511	2,052,562		(3,930,933)	2,736,519	140,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(119,387)
Other comprehensive (loss) income	$ 0
Distribution to common shareholders of the right to receive Five Star Senior Living Inc. common stock										$ (59,801)
Ending balance (in shares) at Sep. 30, 2020	238,268,478	238,268,478
Ending balance at Sep. 30, 2020	$ 2,641,706	$ 2,383	4,613,501	1,929,337		(4,031,177)	2,514,044	127,662
Beginning balance (in shares) at Mar. 31, 2020		237,893,725
Beginning balance at Mar. 31, 2020	2,787,169	$ 2,379	4,612,739	2,062,297		(4,026,418)	2,650,997	136,172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(24,742)			(26,072)			(26,072)	1,330
Distributions	(2,379)					(2,379)	(2,379)
Share grants (in shares)		60,000
Share grants	416	$ 1	415				416
Share repurchases (in shares)		(1,757)
Share repurchases	(8)		(8)				(8)
Distributions to noncontrolling interest	(5,616)							(5,616)
Ending balance (in shares) at Jun. 30, 2020		237,951,968
Ending balance at Jun. 30, 2020	2,754,840	$ 2,380	4,613,146	2,036,225		(4,028,797)	2,622,954	131,886
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(105,788)			(106,888)			(106,888)	1,100
Other comprehensive (loss) income	0
Distributions	(2,380)					(2,380)	(2,380)
Share grants (in shares)		360,000
Share grants	506	$ 3	503				506
Share repurchases (in shares)		(42,180)
Share repurchases	(142)		(142)				(142)
Share forfeitures (in shares)		(1,310)
Share forfeitures	(6)		(6)				(6)
Distributions to noncontrolling interest	$ (5,324)							(5,324)
Ending balance (in shares) at Sep. 30, 2020	238,268,478	238,268,478
Ending balance at Sep. 30, 2020	$ 2,641,706	$ 2,383	$ 4,613,501	$ 1,929,337		$ (4,031,177)	$ 2,514,044	$ 127,662

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ (119,387)	$ (32,258)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization	204,466	219,522
Amortization of debt issuance costs and debt discounts and premiums	5,574	4,592
Straight line rental income	(3,029)	(3,550)
Amortization of acquired real estate leases and other intangible assets	(5,559)	(4,922)
Loss on early extinguishment of debt	51	17
Gain on lease termination	(22,896)	0
Impairment of assets	106,611	41,518
Gain on sale of properties	(2,403)	(21,893)
Gains and losses on equity securities, net	(14,541)	41,476
Other non-cash adjustments, net	(1,662)	(2,828)
Equity in earnings of an investee	0	(617)
Change in assets and liabilities:
Other assets	(39,358)	(6,139)
Accrued interest	29,604	4,126
Other liabilities	21,508	(43,374)
Net cash provided by operating activities	158,979	195,670
Cash flows from investing activities:
Real estate acquisitions and deposits	(2,526)	0
Real estate improvements	(118,141)	(175,146)
Proceeds from sale of properties, net	78,244	50,355
Proceeds from sale of RMR Inc. common shares, net	0	98,557
Distributions in excess of earnings from Affiliates Insurance Company	287	0
Net cash used in investing activities	(42,136)	(26,234)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes, net	985,000	0
Proceeds from borrowings on revolving credit facility	430,500	803,000
Repayments of borrowings on revolving credit facility	(968,000)	(353,000)
Repayment of senior unsecured notes	(200,000)	(400,000)
Repayment of unsecured term loan	(250,000)	0
Repayment of other debt	(5,189)	(45,438)
Loss on early extinguishment of debt settled in cash	(376)	0
Payment of debt issuance costs	(5,306)	0
Repurchase of common shares	(171)	(292)
Distributions to noncontrolling interest	(16,707)	(16,294)
Distributions to shareholders	(40,443)	(164,034)
Net cash used in financing activities	(70,692)	(176,058)
Increase (decrease) in cash and cash equivalents and restricted cash	46,151	(6,622)
Cash and cash equivalents and restricted cash at beginning of period	52,224	70,071
Cash and cash equivalents and restricted cash at end of period	98,375	63,449
Supplemental cash flow information:
Interest paid	109,689	129,010
Income taxes paid	381	452
Non-cash investing activities:
Capitalized interest	1,152	$ 888
Five Star
Non-cash investing activities:
Transaction Agreement additional consideration	(75,000)
Five Star
Non-cash investing activities:
Five Star Senior Living Inc. common stock	97,896
Shareholders | Five Star
Non-cash financing activities:
Distribution to common shareholders of the right to receive Five Star Senior Living Inc. common stock	$ (59,801)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020		Dec. 31, 2019	Sep. 30, 2019		Dec. 31, 2018
Cash and cash equivalents	$ 82,241		$ 37,357	$ 49,462
Restricted cash	16,134	[1]	14,867	13,987	[1]
Total cash and cash equivalents and restricted cash shown in our condensed consolidated statements of cash flows	$ 98,375		$ 52,224	$ 63,449		$ 70,071
Joint Venture
Ownership percentage	55.00%

[1] Restricted cash consists of amounts escrowed for real estate taxes, insurance and capital expenditures at certain of our mortgaged properties and cash held for the operations of one of our life science properties that is owned in a joint venture arrangement in which we own a 55% equity interest.

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Basis of Presentation

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements of Diversified Healthcare Trust and its subsidiaries, or we, us, or our, are unaudited. Certain information and disclosures required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements have been condensed or omitted. We believe the disclosures made are adequate to make the information presented not misleading. However, the accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2019, or our Annual Report.

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of results for the interim period have been included. All intercompany transactions and balances with or among our consolidated subsidiaries have been eliminated. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year.

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts. Actual results could differ from those estimates. Significant estimates in our condensed consolidated financial statements include purchase price allocations, useful lives of fixed assets and impairments of real estate and intangible assets. We have made reclassifications to the financial statements of prior periods to conform to the current period presentation. These reclassifications had no effect on net income (loss) or equity.

We have been, are currently, and expect in the future to be involved in claims, lawsuits, and regulatory and other governmental audits, investigations and proceedings arising in the ordinary course of our business, some of which may involve material amounts. Also, the defense and resolution of these claims, lawsuits, and regulatory and other governmental audits, investigations and proceedings may require us to incur significant expense. We account for claims and litigation losses in accordance with FASB ASC Topic 450, Contingencies, or ASC 450. Under ASC 450, loss contingency provisions are recorded for probable and estimable losses at our best estimate of a loss or, when a best estimate cannot be made, at our estimate of the minimum loss. These estimates are often developed prior to knowing the amount of the ultimate loss, require the application of considerable judgment, and are refined as additional information becomes known. Accordingly, we are often initially unable to develop a best estimate of loss and therefore the estimated minimum loss amount, which could be zero, is recorded; and then, as information becomes known, the minimum loss amount is updated, as appropriate. A minimum or best estimate amount may be increased or decreased when events result in a changed expectation.

We have a joint venture arrangement with an institutional investor for one of our life science properties located in Boston, Massachusetts. The investor owns a 45% equity interest in the joint venture, and we own the remaining 55% equity interest in the joint venture. We have determined that this joint venture is a variable interest entity, or VIE, as defined under the Consolidation Topic of the Financial Accounting Standards Board, or FASB, Accounting Standards Codification. We concluded that we must consolidate this VIE because we are the entity with the power to direct the activities that most significantly impact the VIE's economic performance and we have the obligation to absorb losses of, and the right to receive benefits from, the VIE that could be significant to the VIE, and therefore are the primary beneficiary of the VIE. The assets of this VIE were $981,204 and $1,015,661 as of September 30, 2020 and December 31, 2019, respectively, and consist primarily of the net real estate owned by the joint venture. The liabilities of this VIE were $698,667 and $704,344 as of September 30, 2020 and December 31, 2019, respectively, and consist primarily of mortgage debts secured by the property. The investor's interest in this consolidated entity is reflected as a noncontrolling interest in our condensed consolidated financial statements. See Note 7 for further information about this joint venture.

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Recent Events and Accounting Pronouncements

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Recent Events and Accounting Pronouncements

Recent Events and Accounting PronouncementsRecent Events. In March 2020, the World Health Organization declared the outbreak of COVID-19 as a pandemic and, in response to the outbreak, the U.S. Health and Human Services Secretary declared a public health emergency in the United States and many states and municipalities declared public health emergencies. Various governmental and market responses attempting to contain and mitigate the spread of the virus have negatively impacted, and continue to negatively impact, the global economy, including the U.S. economy, and our results of operations, financial position and cash flow. In the United States, individuals are being encouraged to practice social distancing, are generally restricted from gathering in groups and, in

some areas, either have been or are subject to stay at home orders, which restrict or prohibit social gatherings, travel and non-essential activities outside of their homes. We do not know when these restrictions will abate.

Our result of operations and cash flows from our senior living communities are dependent on our operators' ability to generate returns to us. Senior living community operators have experienced disruptions, including limitations on in-person tours and new move-ins, and are experiencing challenges in attracting new residents to our communities. In addition, our operators are experiencing increased expenses due to increased labor costs, including higher health benefits costs, and increased costs and consumption of supplies, including personal protective equipment, which costs reduce our returns.

As a result of the disruptions caused by the pandemic, we have taken various measures to improve our liquidity and financial flexibility. Since March 2020, we have reduced our quarterly cash distribution rate on our common shares to $0.01 per common share, reduced our planned capital expenditures, issued $1,000,000 of senior notes, repaid all amounts outstanding under our $1,000,000 unsecured revolving credit facility, sold assets for aggregate sales prices of $120,776 and entered agreements to sell additional properties for $167,392. In addition, on June 30, 2020, we amended the agreements that govern our revolving credit facility and our $200,000 term loan. Among other things, the amendments require that we maintain $200,000 of unrestricted cash and/or undrawn availability under our revolving credit facility and restrict our ability to incur additional debt (with the exception of borrowings under our revolving credit facility).

Recent Accounting Pronouncements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. We adopted this standard which was effective as of January 1, 2020 using the modified retrospective approach. The implementation of this standard did not have a material impact in our condensed consolidated financial statements.

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Real Estate Properties

9 Months Ended

Sep. 30, 2020

Real Estate [Abstract]

Real Estate Properties

Real Estate Properties

As of September 30, 2020, we owned 407 properties located in 37 states and Washington, D.C., including 22 properties classified as held for sale, 10 properties scheduled for closure and/or sale and one life science property owned in a joint venture arrangement in which we own a 55% equity interest.

We regularly evaluate our assets for indicators of impairment. Impairment indicators may include declining tenant or resident occupancy, weak or declining profitability from the property, decreasing tenant cash flows or liquidity, our decision to dispose of an asset before the end of its estimated useful life, and legislative, market or industry changes that could permanently reduce the value of an asset. If indicators of impairment are present, we evaluate the carrying value of the affected assets by comparing it to the expected future cash flows to be generated from those assets. The future cash flows are subjective and are based in part on assumptions regarding hold periods, market rents and terminal capitalization rates. If the sum of these expected future cash flows is less than the carrying value, we reduce the net carrying value of the asset to its estimated fair value.

Acquisition Activities:

In January 2020, we acquired a vacant land parcel adjacent to a property we own in our portfolio of medical office and life science properties, or our Office Portfolio, segment located in Tempe, Arizona for $2,600, excluding acquisition costs.

Disposition Activities:

During the nine months ended September 30, 2020, we sold 17 properties for an aggregate sales price of $80,601, excluding closing costs, as presented in the table below. The sales of these properties do not represent significant dispositions individually or in the aggregate, nor do we believe they represent a strategic shift in our business. As a result, the results of the

operation for these properties are included in continuing operations through the date of sale of such properties in our condensed consolidated statements of comprehensive income (loss).

Date of Sale	Location	Type of Property	Number of Properties	Square Feet or Number of Units		Sales Price (1)		Gain (loss) on Sale		Impairment of Assets
January 2020	Louisiana	Medical Office	6	40,575	sq. ft.	$	5,925	$	(81)	$	—
February 2020	Pennsylvania	Medical Office	1	50,000	sq. ft.	2,900		—		(47)
March 2020	Texas	Medical Office	1	70,229	sq. ft.	8,779		2,863		—
April 2020	California	Managed Senior Living	3	599	units	47,000		(168)		5,465
June 2020	South Carolina	Medical Office	1	49,242	sq. ft.	3,550		—		2,753
July 2020	Texas	Medical Office	1	6,849	sq. ft.	2,072		(30)		—
July 2020	Connecticut	Medical Office	1	32,162	sq. ft.	625		(25)		267
August 2020	Mississippi	Managed Senior Living	2	116	units	2,500		(42)		227
September 2020	Mississippi	Medical Office	1	78,747	sq. ft.	7,250		(114)		148
			17			$	80,601	$	2,403	$	8,813

(1)Sales price excludes closing costs.

As of September 30, 2020, we had 22 properties classified as held for sale in our condensed consolidated balance sheet as follows:

Type of Property	Number of Properties	Gross Book Value		Impairment of Assets(1)
Managed Senior Living	14	$	52,958	$	33,356
Medical Office	5	69,230		1,524
Triple Net Leased, Senior Living	3	43,603		—
	22	$	165,791	$	34,880

(1)We recorded an aggregate of $34,880 impairment of real estate during the nine months ended September 30, 2020 to adjust the carrying values of certain of these properties to their estimated fair values less costs to sell.

In October and November 2020, the three triple net leased senior living communities and one of the 14 managed senior living communities classified as held for sale in the table above were sold for an aggregate sales price of $49,000, excluding closing costs.

We recorded impairment charges of $3,071 related to six medical office properties and one senior living community that were classified as held for sale during the three months ended March 31, 2020. These properties were subsequently reclassified to held and used as of June 30, 2020.

We also recorded impairment charges of $59,847 during the three and nine months ended September 30, 2020 related to nine of the 10 senior living communities that were scheduled for closure and/or sale as of September 30, 2020.

As of November 2, 2020, we had 21 properties under agreements to sell for an aggregate sales price of approximately $167,392, excluding closing costs. We may not complete the sales of any or all of the properties we currently plan to sell. Also, we may sell some or all of these properties at amounts that are less than currently expected and/or less than the carrying values of such properties and we may incur losses on any such sales as a result.

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Leases

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

Leases

We are a lessor of medical office and life science properties, senior living communities and other healthcare related properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the premises demised under the leases; therefore, we have determined to evaluate our leases as lease arrangements.

Certain of our leases provide for base rent payments and in addition may include variable payments. Rental income from operating leases, including any payments derived by index or market based indices, is recognized on a straight line basis over

the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term.

We increased rental income to record revenue on a straight line basis by $491 and $1,186 for the three months ended September 30, 2020 and 2019, respectively, and $3,029 and $3,550 for the nine months ended September 30, 2020 and 2019, respectively. Rents receivable, excluding properties classified as held for sale, include $102,691 and $99,297 of straight line rent receivables at September 30, 2020 and December 31, 2019, respectively, and are included in other assets, net in our condensed consolidated balance sheets.

We do not include in our measurement of our lease receivables certain variable payments, including changes in the index or market based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. We recognized such payments totaling $18,501 and $19,317 for the three months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $1,428 and $1,506, respectively, and $56,792 and $57,687 for the nine months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $3,522 and $3,906, respectively.

Certain of our tenants have requested relief from their obligations to pay rent due to us in response to the current economic conditions resulting from the COVID-19 pandemic. As of November 2, 2020, we granted requests for certain of our tenants to defer rent payments totaling $2,152. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. We have elected to use the FASB relief package regarding the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. The FASB relief package provides entities with the option to account for lease concessions resulting from the COVID-19 pandemic outside of the existing lease modification guidance if the resulting cash flows from the modified lease are substantially the same as the original lease. Because the majority of the deferred rents referenced above will generally be repaid, the cash flows from the respective leases are substantially the same as before the rent deferrals. These deferred amounts did not negatively impact our operating results for the three and nine months ended September 30, 2020 and, as of September 30, 2020, we recognized $4,467 in our accounts receivable related to these deferred amounts.

Right of Use Asset and Lease Liability. For leases where we are the lessee, we recognized a right of use asset and a lease liability equal to the present value of the minimum lease payments with rental payments being applied to the lease liability and the right of use asset being amortized over the term of the lease. The values of the right of use asset and related liability representing our future obligation under the lease arrangement for which we are the lessee were $4,256 and $4,423, respectively, as of September 30, 2020, and $4,319 and $4,461, respectively, as of December 31, 2019. The right of use asset and related lease liability are included within other assets, net and other liabilities, respectively, within our condensed consolidated balance sheets. In addition, we lease equipment at certain of our managed senior living communities. These leases are short term in nature, are cancelable with no fee or do not result in an annual expense in excess of our capitalization policy and, as a result, are not recorded on our condensed consolidated balance sheets.

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Indebtedness

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Indebtedness

Indebtedness

Our principal debt obligations at September 30, 2020 were: (1) $2,650,000 outstanding principal amount of senior unsecured notes; (2) $200,000 outstanding principal amount under our term loan; and (3) $684,962 aggregate principal amount of mortgage notes (excluding premiums, discounts and net debt issuance costs) secured by seven properties, of which $620,000 is related to a joint venture arrangement in which we own a 55% equity interest. These seven mortgaged properties had a gross book value of $946,037 at September 30, 2020. We also had two properties subject to finance leases with lease obligations totaling $8,084 at September 30, 2020; these two properties had gross book value and accumulated depreciation of $35,611 and $17,429, respectively, at September 30, 2020, and the finance leases expire in 2026.

We have a $1,000,000 unsecured revolving credit facility that is available for general business purposes. The maturity date of our revolving credit facility is January 15, 2022, and, subject to the payment of an extension fee and meeting other conditions, we have the option to extend the maturity date of the facility for an additional year. Our revolving credit facility provides that we can borrow, repay and re-borrow funds available under our revolving credit facility until maturity, and no principal repayment is due until maturity. As of September 30, 2020, our revolving credit facility required interest to be paid on

borrowings at the annual rate of 2.6%, plus a facility fee of 30 basis points per annum on the total amount of lending commitments under the facility.

The weighted average annual interest rates for borrowings under our revolving credit facility were 2.6% and 3.5% for the three months ended September 30, 2020 and 2019, respectively, and 2.2% and 3.5% for the nine months ended September 30, 2020 and 2019, respectively. The interest rate premium and facility fee are each subject to adjustment based upon changes to our credit ratings. As of September 30, 2020 and November 2, 2020, we had no outstanding borrowings and $1,000,000 available for borrowing under our revolving credit facility.

We have a $200,000 unsecured term loan that matures in September 2022 and is prepayable without penalty at any time. At September 30, 2020, the annual interest rate payable on amounts outstanding under this term loan was 2.8%. The weighted average annual interest rate for amounts outstanding under this term loan was 2.7% and 3.6% for the three months ended September 30, 2020 and 2019, respectively, and 2.7% and 3.8% for the nine months ended September 30, 2020 and 2019, respectively. The interest rate premium is subject to adjustment based upon changes to our credit ratings.

In February 2020, we prepaid a mortgage note secured by one of our life science properties with an outstanding principal balance of approximately $1,554, a maturity date in March 2026 and an annual interest rate of 6.25%. As a result of this prepayment, we recorded a loss on early extinguishment of debt of $246 for the nine months ended September 30, 2020. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In April 2020, we redeemed all of our outstanding 6.75% senior notes due 2020 for a redemption price equal to the principal amount of $200,000 plus accrued and unpaid interest of $6,750. We funded this redemption with cash on hand and borrowings under our revolving credit facility.

In May 2020, we prepaid a mortgage note secured by one of our medical office properties with an outstanding principal balance of approximately $1,213, a maturity date in January 2022 and an annual interest rate of 7.49%. As a result of the prepayment of this mortgage note, we recorded a loss on early extinguishment of debt of $155 for the nine months ended September 30, 2020. We prepaid this mortgage using cash on hand and borrowings under our revolving credit facility.

In June 2020, we issued $1,000,000 aggregate principal amount of our 9.75% senior notes due 2025 in an underwritten public offering raising net proceeds of $982,300, after deducting estimated offering expenses and underwriters' discounts. These notes are guaranteed by all of our subsidiaries, except for certain excluded subsidiaries, and require semi-annual interest payments through maturity. Prior to June 15, 2022, we may, at our option, redeem all or a portion of these notes at a redemption price equal to the outstanding principal amount of these notes, plus accrued and unpaid interest, plus the make-whole amount set forth in the indenture which governs these notes, as supplemented, or our 2025 Notes Indenture. Prior to June 15, 2022, we may also, at our option, redeem up to 40% of the aggregate principal amount of these notes with the net proceeds of certain equity offerings at the redemption price set forth in the 2025 Notes Indenture, so long as at least 50% of the original aggregate principal amount of these notes remains outstanding after each such redemption. In addition, we have the option to redeem all or a portion of these notes at any time on or after June 15, 2022 at the redemption prices set forth in the 2025 Notes Indenture. We used the net proceeds from this offering to prepay in full our $250,000 unsecured term loan which was scheduled to mature in June 2020 and to reduce amounts outstanding under our revolving credit facility. The weighted average interest rate under our $250,000 senior unsecured term loan was 2.4% for the period from January 1, 2020 to June 2, 2020. As a result of the repayment of our $250,000 senior unsecured term loan, we recorded a loss on early extinguishment of debt of $26 for the nine months ended September 30, 2020.

In June 2020, we amended the agreements governing our $1,000,000 unsecured revolving credit facility and $200,000 unsecured term loan, or collectively, our credit and term loan agreements. The amendments modify certain of the financial covenants under our credit and term loan agreements through June 30, 2021, or the Amendment Period, during which, subject to certain conditions, we will continue to have access to undrawn amounts under our revolving credit facility. We have the right to terminate the Amendment Period prior to June 30, 2021, subject to certain conditions.

During the Amendment Period:

•our interest rate premium over LIBOR under our revolving credit facility and term loan increased by 50 basis points;

•we will generally be required to apply the net cash proceeds from the disposition of assets, capital markets transactions, debt financings or COVID-19 government stimulus programs, if allowed, to the repayment of outstanding loans under the revolving credit facility, if any;

•we will be subject to certain additional covenants, including additional restrictions on our ability to incur indebtedness (with exceptions for borrowings under our revolving credit facility and certain other categories of secured and unsecured indebtedness), and to acquire real property or make other investments (with exceptions for, among other things, certain categories of capital expenditures and costs);

•we will be required to maintain unrestricted liquidity (unrestricted cash and undrawn availability under our revolving credit facility) of not less than $200,000; and

•our ability to pay distributions on our common shares will be limited to paying a cash dividend of $0.01 per common share per quarter and amounts required to maintain our qualification for taxation as a real estate investment trust, or REIT, and to avoid the payment of certain income and excise taxes.

Our credit and term loan agreements and our senior unsecured notes indentures and their supplements provide for acceleration of payment of all amounts due thereunder upon the occurrence and continuation of certain events of default, such as, in the case of our credit and term loan agreements, a change of control of us, as defined, which includes The RMR Group LLC, or RMR LLC, ceasing to act as our business and property manager. Our credit and term loan agreements and our senior unsecured notes indentures and their supplements also contain covenants, including covenants that restrict our ability to incur debts, and generally require us to maintain certain financial ratios, and our credit and term loan agreements restrict our ability to make distributions under certain circumstances. We believe we were in compliance with the terms and conditions of the respective covenants under our credit and term loan agreements and our senior unsecured notes indentures and their supplements at September 30, 2020. Although we have taken steps to enhance our ability to maintain sufficient liquidity, as noted elsewhere in this Quarterly Report on Form 10-Q, a protracted negative economic impact resulting from the COVID-19 pandemic may cause increased pressure on our ability to satisfy financial and other covenants.

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Fair Value of Assets and Liabilities

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities

Fair Value of Assets and Liabilities

The following table presents certain of our assets that are measured at fair value at September 30, 2020, categorized by the level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset.

			Fair Value at Reporting Date Using
			Quoted Prices in  Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Recurring Fair Value Measurements Assets:
Investment in Five Star (1)	$	54,207	$	54,207	$	—	$	—
Non-Recurring Fair Value Measurements Assets:
Real estate properties held for sale (2)	$	56,673	$	—	$	56,673	$	—
Real estate properties at fair value (3)	$	31,010	$	—	$	—	$	31,010

(1)Our 10,691,658 shares of common stock of Five Star Senior Living Inc., or Five Star, are included in other assets, net in our condensed consolidated balance sheets, and are reported at fair value, which is based upon quoted market prices on The Nasdaq Stock Market LLC, or Nasdaq, (Level 1 inputs). On April 1, 2019, we entered into a transaction agreement with Five Star, or the Transaction Agreement, to restructure our business arrangements with Five Star, or the Restructuring Transaction. Pursuant to the Transaction Agreement, on January 1, 2020, Five Star issued 10,268,158 Five Star common shares to us. The fair value and initial cost basis of the Five Star common shares issued to us on January 1, 2020 was $38,095. Our adjusted cost basis inclusive of the 423,500 Five Star common shares we owned as of December 31, 2019 and the 10,268,158 Five Star common shares issued to us on January 1, 2020 was $44,448 as of September 30, 2020. During the three and nine months ended September 30, 2020, we recorded unrealized gains of $12,510 and $14,541, respectively, which is included in gains and losses on equity securities, net in

our condensed consolidated statements of comprehensive income (loss), to adjust the carrying value of our investment in Five Star common shares to their fair value. See Note 12 for further information about our investment in Five Star.

(2)We have assets in our condensed consolidated balance sheets that are measured at fair value on a nonrecurring basis. During the nine months ended September 30, 2020, we recorded impairment charges of $1,524 to reduce the carrying value of one medical office property that is classified as held for sale to its estimated sales price, less estimated costs to sell of $160, based on the sales price under a purchase and sale agreement that we have entered into with a third party buyer for this medical office property of $3,875. We also recorded impairment charges of $33,356 to reduce the carrying value of 14 senior living communities that are classified as held for sale to their estimated sales price, less estimated costs to sell of $1,142, based on the aggregate sales prices under the purchase and sale agreements that we have entered into with third party buyers for these senior living communities of $54,100. See Note 3 for further information about impairment charges and these and other properties we have classified as held for sale.

(3)We recorded impairment charges of $59,847 to reduce the carrying value of nine of our senior living communities scheduled for closure and/or sale to their estimated fair value of $31,010 based upon a combination of the market approach and the income approach and unobservable inputs such as estimated market rent, operating expense assumptions, vacancy data and capitalization rates. We also engaged an external third party to assist us in our estimation of fair value of these communities. The valuation techniques and significant unobservable inputs used in the valuation of these communities are considered Level 3 inputs as defined in the fair value hierarchy under GAAP.

In addition to the assets described in the table above, our financial instruments at September 30, 2020 and December 31, 2019 included cash and cash equivalents, restricted cash, other assets, our revolving credit facility, term loans, senior unsecured notes, secured debt and finance leases and other unsecured obligations and liabilities. The fair values of these financial instruments approximated their carrying values in our condensed consolidated financial statements as of such dates, except as follows:

	As of September 30, 2020				As of December 31, 2019
Description	Carrying Amount (1)		Estimated Fair Value		Carrying Amount (1)		Estimated Fair Value
Senior unsecured notes	$	2,606,550	$	2,558,483	$	1,820,681	$	1,890,386
Secured debts(2) (3)	692,385		705,503		697,729		697,142
	$	3,298,935	$	3,263,986	$	2,518,410	$	2,587,528

(1)Includes unamortized debt issuance costs, premiums and discounts.

(2)We assumed certain of these secured debts in connection with our acquisition of certain properties. We recorded the assumed mortgage notes at estimated fair value on the date of acquisition and we are amortizing the fair value adjustments, if any, to interest expense over the respective terms of the mortgage notes to adjust interest expense to the estimated market interest rates as of the date of acquisition.

(3)Includes $3,015 of principal mortgage obligations and $25 of unamortized debt issuance costs for properties classified as held for sale as of December 31, 2019. These debts are included in liabilities of properties held for sale in our condensed consolidated balance sheet as of December 31, 2019.

We estimated the fair value of our two issuances of senior unsecured notes due 2042 and 2046 based on the closing price on Nasdaq (Level 1 input) as of September 30, 2020. We estimated the fair values of our four issuances of senior unsecured notes due 2021, 2024, 2025 and 2028 using an average of the bid and ask price on Nasdaq on or about September 30, 2020 (Level 2 inputs as defined in the fair value hierarchy under GAAP). We estimated the fair values of our secured debts by using discounted cash flows analyses and currently prevailing market terms as of the measurement date (Level 3 inputs as defined in the fair value hierarchy under GAAP). Because Level 3 inputs are unobservable, our estimated fair values may differ materially from the actual fair values.

Realized and unrealized gains and losses for our equity securities for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Realized gains and losses on equity securities sold (1)	$	—	$	—	$	—	$	(41,436)
Unrealized gains and losses on equity securities held	12,510		40		14,541		(40)
Gains and losses on equity securities, net	$	12,510	$	40	$	14,541	$	(41,476)

(1)This amount relates to our sale of our former investment in The RMR Group Inc., or RMR Inc., on July 1, 2019. For further information about our former investment in RMR Inc. see our Annual Report.

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Noncontrolling Interest

9 Months Ended

Sep. 30, 2020

Noncontrolling Interest [Abstract]

Noncontrolling Interest

Noncontrolling Interest

We have a joint venture arrangement with an institutional investor for one of our life science properties located in Boston, Massachusetts. The investor owns a 45% equity interest in the joint venture, and we own the remaining 55% equity interest in the joint venture. We continue to control this property and therefore continue to account for this property on a consolidated basis in our condensed consolidated financial statements under the VIE model. The portion of the joint venture's net income and comprehensive income not attributable to us, or $1,100 and $1,444 for the three months ended September 30, 2020 and 2019, respectively, and $3,838 and $4,279 for the nine months ended September 30, 2020 and 2019, respectively, is reported as a noncontrolling interest in our condensed consolidated statements of comprehensive income (loss). The joint venture made aggregate cash distributions to the other joint venture investor of $5,324 and $5,107 for the three months ended September 30, 2020 and 2019, respectively, and $16,707 and $16,294 for the nine months ended September 30, 2020 and 2019, respectively, which are reflected as a decrease in total equity attributable to noncontrolling interest in our condensed consolidated balance sheets. As of September 30, 2020, this joint venture held real estate assets with an aggregate net book value of $710,001, subject to mortgage notes of $620,000.

In assessing whether we have a controlling interest in this joint venture arrangement and are required to consolidate the accounts of the joint venture entity, we considered the members' rights to residual gains and obligations to absorb losses, which activities most significantly impact the economic performance of the entity and which member has the power to direct those activities.

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Shareholders' Equity

9 Months Ended

Sep. 30, 2020

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders' Equity

Common Share Awards:

During the nine months ended September 30, 2020, we awarded our common shares, valued at the closing price of our common shares on Nasdaq on the applicable award date, as follows:

Date Awarded	Number of Shares	Price per Share
May 19, 2020 (1)	60,000	$	2.94
September 17, 2020 (2)	360,000	$	3.77

(1)In accordance with our Trustee compensation arrangements, we awarded to each of our six Trustees 10,000 of our common shares.

(2)We awarded under our equity compensation plan an aggregate of 360,000 of our common shares to our officers and certain other employees of RMR LLC.

Common Share Purchases:

During the nine months ended September 30, 2020, we purchased our common shares from our officers and certain current and former officers and employees of RMR LLC in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares, valued at the closing price of our common shares on Nasdaq on the purchase dates, as follows:

Date Purchased	Number of Shares	Price per Share
January 9, 2020	1,938	$	8.10
March 13, 2020	1,500	$	3.79
June 30, 2020	1,757	$	4.43
September 21, 2020	42,180	$	3.38

Distributions:

During the nine months ended September 30, 2020, we declared and paid quarterly distributions to common shareholders as follows:

Record Date	Payment Date	Distribution Per Share		Total Distributions
January 27, 2020	February 20, 2020	$	0.15	$	35,684
April 13, 2020	May 21, 2020	$	0.01	$	2,379
July 27, 2020	August 20, 2020	$	0.01	$	2,380

On October 15, 2020, we declared a quarterly distribution payable to our common shareholders of record on October 26, 2020 in the amount of $0.01 per share, or approximately $2,382. We expect to pay this distribution on or about November 19, 2020.

As described in Note 10, pursuant to the Transaction Agreement, on January 1, 2020, Five Star issued an aggregate of 16,118,849 of its common shares, with a value of $59,801, to our shareholders of record as of December 13, 2019. We recorded this issuance as a non-cash distribution in our condensed consolidated financial statements.

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Segment Reporting

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Segment Reporting

Segment ReportingWe operate in, and report financial information for, the following two segments: Office Portfolio and senior housing operating portfolio, or SHOP. We aggregate each of these two reporting segments based on their similar operating and economic characteristics. Our Office Portfolio segment consists of medical office properties leased to medical providers and other medical related businesses, as well as life science properties leased to biotech laboratories and other similar tenants. Our

SHOP segment consists of managed senior living communities that provide short term and long term residential living and in some instances care and other services for residents where we pay fees to the operator to manage the communities for our account. In addition, prior to January 1, 2020, our SHOP segment included triple net leased senior living communities that provided short term and long term residential living and in some instances care and other services for residents and from which we received rents from Five Star. Pursuant to the Restructuring Transaction, effective January 1, 2020, our previously existing master leases and management and pooling agreements with Five Star were terminated and replaced with new management and related agreements, or collectively, the New Management Agreements, for all of our senior living communities operated by Five Star. Prior periods have been recast to reflect these reportable segments for all periods presented.

We also report “non-segment” operations, which consists of triple net leased senior living communities, which are leased to operators other than Five Star from which we receive rents, and wellness centers, which we do not consider to be sufficiently material to constitute a separate reporting segment, and any other income or expenses that are not attributable to a specific reporting segment.

	For the Three Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	94,235	$	—	$	10,003	$	104,238
Residents fees and services	—		290,101		—		290,101
Total revenues	94,235		290,101		10,003		394,339
Expenses:
Property operating expenses	33,448		282,202		—		315,650
Depreciation and amortization	32,816		31,570		2,825		67,211
General and administrative	—		—		6,988		6,988
Acquisition and certain other transaction related costs	—		—		53		53
Impairment of assets	1,334		62,868		—		64,202
Total expenses	67,598		376,640		9,866		454,104
Loss on sale of properties	(169)		(42)		—		(211)
Gains on equity securities, net	—		—		12,510		12,510
Interest and other income	—		—		134		134
Interest expense	(6,068)		(552)		(51,471)		(58,091)
Income (loss) from continuing operations before income tax expense	20,400		(87,133)		(38,690)		(105,423)
Income tax expense	—		—		(365)		(365)
Net income (loss)	20,400		(87,133)		(39,055)		(105,788)
Net income attributable to noncontrolling interest	(1,100)		—		—		(1,100)
Net income (loss) attributable to common shareholders	$	19,300	$	(87,133)	$	(39,055)	$	(106,888)

	For the Nine Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	288,515	$	—	$	32,428	$	320,943
Residents fees and services	—		926,174		—		926,174
Total revenues	288,515		926,174		32,428		1,247,117
Expenses:
Property operating expenses	97,047		837,103		—		934,150
Depreciation and amortization	97,213		98,385		8,868		204,466
General and administrative	—		—		23,132		23,132
Acquisition and certain other transaction related costs	—		—		803		803
Impairment of assets	8,090		98,521		—		106,611
Total expenses	202,350		1,034,009		32,803		1,269,162
Gain (loss) on sale of properties	2,613		(210)		—		2,403
Gains on equity securities, net	—		—		14,541		14,541
Interest and other income	—		7,346		662		8,008
Interest expense	(18,140)		(1,676)		(123,899)		(143,715)
Gain on lease termination	—		—		22,896		22,896
Loss on early extinguishment of debt	(401)		—		(26)		(427)
Income (loss) from continuing operations before income tax expense	70,237		(102,375)		(86,201)		(118,339)
Income tax expense	—		—		(1,048)		(1,048)
Net income (loss)	70,237		(102,375)		(87,249)		(119,387)
Net income attributable to noncontrolling interest	(3,838)		—		—		(3,838)
Net income (loss) attributable to common shareholders	$	66,399	$	(102,375)	$	(87,249)	$	(123,225)

(1)Residents fees and services for the nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

Under the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act, the U.S. Department of Health and Human Services, or HHS, established the Provider Relief Fund. Retention and use of the funds received under the CARES Act are subject to certain terms and conditions. The terms and conditions require that the funds be utilized to compensate for lost revenues that are attributable to the COVID-19 pandemic and for eligible costs to prevent, prepare for and respond to the COVID-19 pandemic that are not covered by other sources. Further, fund recipients are required to be participating in Medicare at the time of distribution and are subject to certain other terms and conditions, including quarterly reporting requirements. In addition, fund recipients are required to have billed Medicare during 2019 and to continue to provide care after January 31, 2020 for diagnosis, testing or care for individuals with possible or actual COVID-19 cases. Any funds not used in accordance with the terms and conditions must be returned to HHS. As of September 30, 2020, we had received $15,459 in funds from the Provider Relief Fund to be used to support the operations of our managed senior living communities; we have currently determined that $7,346 of such funds meet the required terms and conditions. We have recognized $7,346 as other income with respect to our SHOP segment for the nine months ended September 30, 2020. We currently expect to return the remaining $8,113 of such funds to HHS in November 2020 unless and to the extent we determine that such funds meet the required terms and conditions and have therefore included that amount in other liabilities in our condensed consolidated financial statements as of September 30, 2020. We have applied for additional funds that may be available under the CARES Act Provider Relief Fund; however, we may not receive any additional funding.

	As of September 30, 2020
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,105,760	$	2,914,966	$	514,392	$	6,535,118

	For the Three Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	100,010	$	32,738	$	15,263	$	148,011
Residents fees and services	—		107,816		—		107,816
Total revenues	100,010		140,554		15,263		255,827
Expenses:
Property operating expenses	34,184		90,899		—		125,083
Depreciation and amortization	33,801		34,901		4,666		73,368
General and administrative	—		—		9,604		9,604
Acquisition and certain other transaction related costs	—		—		2,492		2,492
Impairment of assets	26,037		718		6,344		33,099
Total expenses	94,022		126,518		23,106		243,646
Gain on sale of properties	4,183		—		—		4,183
Gains on equity securities, net	—		—		40		40
Interest and other income	—		—		238		238
Interest expense	(6,239)		(585)		(37,993)		(44,817)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	3,932		13,451		(45,558)		(28,175)
Income tax benefit	—		—		146		146
Equity in earnings of an investee	—		—		83		83
Net income (loss)	3,932		13,451		(45,329)		(27,946)
Net income attributable to noncontrolling interest	(1,444)		—		—		(1,444)
Net income (loss) attributable to common shareholders	$	2,488	$	13,451	$	(45,329)	$	(29,390)

	For the Nine Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	307,616	$	105,451	$	46,282	$	459,349
Residents fees and services	—		324,767		—		324,767
Total revenues	307,616		430,218		46,282		784,116
Expenses:
Property operating expenses	98,886		263,612		—		362,498
Depreciation and amortization	104,939		100,080		14,503		219,522
General and administrative	—		—		28,287		28,287
Acquisition and certain other transaction related costs	—		—		11,209		11,209
Impairment of assets	26,133		9,041		6,344		41,518
Total expenses	229,958		372,733		60,343		663,034
Gain on sale of properties	6,686		15,207		—		21,893
Dividend income	—		—		1,846		1,846
Losses on equity securities, net	—		—		(41,476)		(41,476)
Interest and other income	—		—		590		590
Interest expense	(18,257)		(2,481)		(116,102)		(136,840)
Loss on early extinguishment of debt	—		(17)		—		(17)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	66,087		70,194		(169,203)		(32,922)
Income tax benefit	—		—		47		47
Equity in earnings of an investee	—		—		617		617
Net income (loss)	66,087		70,194		(168,539)		(32,258)
Net income attributable to noncontrolling interest	(4,279)		—		—		(4,279)
Net income (loss) attributable to common shareholders	$	61,808	$	70,194	$	(168,539)	$	(36,537)

	As of December 31, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,165,577	$	3,044,989	$	443,260	$	6,653,826

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Leases and Management Agreements with Five Star

9 Months Ended

Sep. 30, 2020

Risks and Uncertainties [Abstract]

Leases and Management Agreements with Five Star

Leases and Management Agreements with Five Star

As of December 31, 2019, we leased 166 senior living communities to Five Star. As of that date, we also leased to our taxable REIT subsidiaries, or TRSs, 78 communities that we owned and that were managed by Five Star for our account.

Restructuring of our Business Arrangements with Five Star

The Transaction Agreement with Five Star. Pursuant to the Transaction Agreement, effective January 1, 2020, or the Conversion Time:

•our previously existing master leases with Five Star for all of our senior living communities that Five Star leased, as well as our previously existing management agreements and pooling agreements with Five Star for our senior living communities that Five Star managed, were terminated and replaced, or the Conversion, with the New Management Agreements;

•Five Star issued to us 10,268,158 Five Star common shares and an aggregate of 16,118,849 Five Star common shares to our shareholders of record as of December 13, 2019; and

•as consideration for these share issuances, we provided Five Star with $75,000 of additional consideration by assuming certain of Five Star's working capital liabilities and through cash payments, resulting in a gain on lease termination of $22,896 for the nine months ended September 30, 2020 in our condensed consolidated statements of comprehensive income (loss).

Also pursuant to the Transaction Agreement: (1) commencing February 1, 2019, the aggregate amount of monthly minimum rent payable to us by Five Star under our previously existing master leases with Five Star was set at $11,000 as of February 1, 2019, subject to adjustment, and subsequently reduced in accordance with the Transaction Agreement as a result of our subsequent sales of certain of the leased senior living communities, and no additional rent was payable to us by Five Star from such date until the Conversion Time; and (2) as of April 1, 2019, we purchased from Five Star $49,155 of unencumbered Qualifying PP&E (as defined in the Transaction Agreement) related to our senior living communities leased and operated by Five Star.

Pursuant to the New Management Agreements, Five Star receives a management fee equal to 5% of the gross revenues realized at the applicable senior living communities plus reimbursement for its direct costs and expenses related to such communities, as well as an annual incentive fee equal to 15% of the amount by which the annual earnings before interest, taxes, depreciation and amortization, or EBITDA, of all communities on a combined basis exceeds the target EBITDA for all communities on a combined basis for such calendar year, provided that in no event shall the incentive fee be greater than 1.5% of the gross revenues realized at all communities on a combined basis for such calendar year.

The New Management Agreements expire in 2034, subject to Five Star's right to extend for two consecutive five year terms if Five Star achieves certain performance targets for the combined managed communities portfolio, unless earlier terminated. The New Management Agreements also provide us with the right to terminate the New Management Agreement for any community that does not earn 90% of the target EBITDA for such community for two consecutive calendar years or in any two of three consecutive calendar years, with the measurement period commencing January 1, 2021 (and the first termination not possible until the beginning of calendar year 2023), provided we may not in any calendar year terminate communities representing more than 20% of the combined revenues for all communities for the calendar year prior to such termination. Pursuant to a guaranty agreement dated as of January 1, 2020 made by Five Star in favor of our applicable subsidiaries, Five Star has guaranteed the payment and performance of each of its applicable subsidiary's obligations under the applicable New Management Agreements.

On April 1, 2019, we concluded that the Restructuring Transaction constituted a reconsideration event requiring us to assess whether we held a controlling financial interest in Five Star. As a result of this assessment, we determined that Five Star was a VIE effective as of the date of the Transaction Agreement. We determined not to consolidate Five Star in our condensed consolidated financial statements, as we do not have the power to direct the activities of Five Star that most significantly impact Five Star's economic performance and therefore are not the primary beneficiary of Five Star. Effective January 1, 2020, we determined that Five Star is not a VIE and we will account for our 33.9% investment in Five Star using the equity method of accounting because we are deemed to exert significant influence, but not control, over Five Star's most significant activities. We have elected to use the fair value option to account for our investment in Five Star.

Our Senior Living Communities Formerly Leased by Five Star. Prior to the Conversion Time, we leased senior living communities to Five Star pursuant to five master leases with Five Star, each of which was terminated as of January 1, 2020 pursuant to the Transaction Agreement.

Under our previously existing leases with Five Star, Five Star paid us annual rent plus percentage rent equal to 4.0% of the increase in gross revenues at certain of our senior living communities over base year gross revenues as specified in the applicable leases. We recognized rental income payable by Five Star of $32,738 and $105,451 for the three and nine months ended September 30, 2019, respectively. Rental income for the nine months ended September 30, 2019 includes $538 of percentage rent payments we received from Five Star. Rental income from Five Star represented 12.8% and 13.4% of our total revenues for the three and nine months ended September 30, 2019, respectively, and the properties Five Star leased from us represented 27.0%, excluding properties held for sale, of our real estate investments, at cost, as of September 30, 2019. Pursuant to the Transaction Agreement, commencing February 1, 2019, no percentage rent was payable to us by Five Star and annual

rent payable to us by Five Star was adjusted as noted above. We previously determined percentage rent due under these leases annually and recognized it when all contingencies were met, which was typically at year end.

Our previously existing leases with Five Star were “triple net” leases, which generally required Five Star to pay rent and all property operating expenses, to indemnify us from liability which may arise by reason of our ownership of the properties, to maintain the properties at Five Star's expense, to remove and dispose of hazardous substances on the properties in compliance with applicable law and to maintain insurance on the properties for Five Star's and our benefit.

For the nine months ended September 30, 2019, we funded $97,480 of improvements to communities leased to Five Star, including $49,155 of fixed assets and improvements that we purchased pursuant to the Transaction Agreement as discussed above. Also pursuant to the Transaction Agreement, Five Star's rent did not increase as a result of these purchases.

Our Senior Living Communities Managed by Five Star. Five Star managed 239 and 77 senior living communities for our account as of September 30, 2020 and 2019, respectively. We lease our senior living communities that are managed by Five Star to our TRSs, and Five Star manages these communities pursuant to long term management agreements. As described above, pursuant to the Transaction Agreement, effective January 1, 2020, we replaced our long term management and pooling agreements with Five Star with the New Management Agreements, the terms of which are described above.

We incurred management fees payable to Five Star of $15,182 and $3,832 for the three months ended September 30, 2020 and 2019, respectively, and $47,937 and $11,492 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements.

The following table presents residents fees and services revenue disaggregated by type of contract and payer:

	Three Months Ended September 30,				Nine Months Ended September 30,
Revenue from contracts with customers:	2020		2019		2020		2019
Basic housing and support services	$	208,941	$	88,623	$	659,240	$	265,117
Medicare and Medicaid programs	38,882		6,902		131,460		23,333
Private pay and other third party payer SNF services	42,278		12,291		135,474		36,317
Total residents fees and services	$	290,101	$	107,816	$	926,174	$	324,767

In addition to providing management services to us, Five Star also provides certain other services to residents at some of the senior living communities it manages for us, such as rehabilitation services. At senior living communities Five Star manages for us where Five Star provides rehabilitation services on an outpatient basis, the residents, third party payers or government programs pay Five Star for those rehabilitation services. At senior living communities Five Star manages for us where Five Star provides both inpatient and outpatient rehabilitation services, we generally pay Five Star for those rehabilitation services and charges for these services are included in amounts charged to residents, third party payers or government programs. We incurred fees of $5,972 and $1,478 for the three months ended September 30, 2020 and 2019, respectively, and $19,843 and $4,666 for the nine months ended September 30, 2020 and 2019, respectively, with respect to rehabilitation services Five Star provided at senior living communities it manages for us that are payable by us. These amounts are included in property operating expenses in our condensed consolidated statements of comprehensive income (loss).

As a result of routine monitoring protocols that are a part of Five Star's compliance program activities related to Medicare billing, Five Star discovered potentially inadequate documentation at a skilled nursing facility at one of our senior living communities that Five Star manages. This monitoring was not initiated in response to any specific complaint or allegation but rather was of the type that Five Star periodically undertakes to test its compliance with applicable Medicare billing rules. As a result of this discovery, we and Five Star made an initial voluntary disclosure to the United States Department of Health and Human Services, Office of the Inspector General, or the OIG, pursuant to the OIG’s Provider Self-Disclosure Protocol. Five Star has since completed its review and assessment of these matters and we and Five Star will submit a final supplemental disclosure to the OIG in November 2020. At September 30, 2020, we had accrued a revenue reserve of $4,005 for historical Medicare payments we received that we expect to repay as a result of the inadequate documentation Five Star identified. In addition, we have recorded expenses for additional costs incurred or expected to be incurred, including OIG-imposed penalties,

as a result of this matter totaling $2,167 for the three and nine months ended September 30, 2020, of which the entire $2,167 remained accrued and not paid at September 30, 2020.

Since January 1, 2020, we sold certain senior living communities that were then managed by Five Star. We and Five Star terminated our management agreements for these senior living communities in connection with these sales. We have also identified additional senior living communities for sale that are currently managed by Five Star. If these sales are consummated, we and Five Star will terminate the management agreements for these senior living communities. See Note 3 for further information regarding these sales. In addition, we and Five Star have determined to close and/or sell 10 of our senior living communities that Five Star manages.

We lease to Five Star space at certain of our senior living communities that Five Star manages, which it uses to provide certain inpatient and outpatient rehabilitation and wellness services. We recognized a reduction in property operating expenses of $393 and $1,175 for the three and nine months ended September 30, 2020, respectively, with respect to these leases.

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Business and Property Management Agreements with RMR LLC

9 Months Ended

Sep. 30, 2020

Related Party Transactions [Abstract]

Business and Property Management Agreements with RMR LLC

Business and Property Management Agreements with RMR LLC

We have no employees. The personnel and various services we require to operate our business are provided to us by RMR LLC. We have two agreements with RMR LLC to provide management services to us: (1) a business management agreement, which relates to our business generally; and (2) a property management agreement, which relates to the property level operations of our medical office and life science properties. We also have a subsidiary level management agreement with RMR LLC related to one of our life science properties located in Boston, Massachusetts, which we entered in connection with the joint venture arrangement for that life science property. Under that agreement, our subsidiary pays RMR LLC certain business management fees directly, which fees are credited against the business management fees payable by us to RMR LLC. See Note 12 for further information regarding our relationship, agreements and transactions with RMR LLC.

Pursuant to our business management agreement with RMR LLC, we recognized net business management fees of $5,004 and $6,616 for the three months ended September 30, 2020 and 2019, respectively, and $15,614 and $20,917 for the nine months ended September 30, 2020 and 2019, respectively. The net business management fees we recognized include $725 and $2,175 of management fees related to our subsidiary level management agreement with RMR LLC entered in connection with our joint venture arrangement for the three and nine months ended September 30, 2020 and 2019, respectively. Based on our common share total return, as defined in our business management agreement, as of each of September 30, 2020 and 2019, no estimated incentive fees are included in the net business management fees we recognized for the three or nine months ended September 30, 2020 or 2019. The actual amount of annual incentive fees for 2020, if any, will be based on our common share total return as defined in our business management agreement, for the three-year period ending December 31, 2020, and will be payable in 2021. We did not incur any incentive fee payable for the year ended December 31, 2019. We recognize business management and incentive fees in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss).

Pursuant to our property management agreement with RMR LLC, we recognized aggregate net property management and construction supervision fees of $3,477 and $3,289 for the three months ended September 30, 2020 and 2019, respectively, and $10,076 and $9,844 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements.

We are generally responsible for all our operating expenses, including certain expenses incurred or arranged by RMR LLC on our behalf. We are generally not responsible for payment of RMR LLC's employment, office or administrative expenses incurred to provide management services to us, except for the applicable employment and related expenses of RMR LLC's employees assigned to work exclusively or partly at our medical office and life science properties, our share of the wages, benefits and other related costs of RMR LLC's centralized accounting personnel, our share of RMR LLC's costs for providing internal audit services, or as otherwise agreed. Our property level operating expenses are generally incorporated into the rents charged to our tenants, including certain payroll and related costs incurred by RMR LLC. We reimbursed RMR LLC $3,571 and $3,419 for these expenses and costs for the three months ended September 30, 2020 and 2019, respectively, and $10,433 and $10,145 for the nine months ended September 30, 2020 and 2019, respectively. These amounts are included in other operating expenses and general and administrative expenses, as applicable, in our condensed consolidated statements of comprehensive income (loss).

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Related Person Transactions

9 Months Ended

Sep. 30, 2020

Related Party Transactions [Abstract]

Related Person Transactions

Related Person Transactions

We have relationships and historical and continuing transactions with RMR LLC, RMR Inc., Five Star and others related to them, including other companies to which RMR LLC or its subsidiaries provide management services and some of which have trustees, directors or officers who are also our Trustees or officers. RMR Inc. is the managing member of RMR LLC. The Chair of our Board and one of our Managing Trustees, Adam Portnoy, is the sole trustee, an officer and the controlling shareholder of ABP Trust, which is the controlling shareholder of RMR Inc., a managing director and the president and chief executive officer of RMR Inc., an officer and employee of RMR LLC and the chair of the board of directors and a managing director of Five Star. Jennifer Clark, our other Managing Trustee and our Secretary, also serves as a managing director and the executive vice president, general counsel and secretary of RMR Inc., an officer and employee of RMR LLC, an officer of ABP Trust and a managing director and the secretary of Five Star, and each of our officers is also an officer and employee of RMR LLC. Some of our Independent Trustees also serve as independent trustees or independent directors of other public companies to which RMR LLC or its subsidiaries provide management services. Adam Portnoy serves as the chair of the boards of trustees or boards of directors of several of these public companies and as a managing director or managing trustee of these companies. Other officers of RMR LLC, including Ms. Clark and certain of our other officers, serve as managing trustees, managing directors or officers of certain of these companies.

Five Star. We are currently Five Star's largest stockholder. As of September 30, 2020, we owned 10,691,658 Five Star common shares, or approximately 33.9% of Five Star's outstanding common shares. Five Star manages for us most of the senior living communities we own. RMR LLC provides management services to both us and Five Star. Five Star participates in our property insurance program for the senior living communities Five Star owns and leases. The premiums Five Star pays for this coverage are allocated pursuant to a formula based on the profiles of the properties included in the program. Five Star's program cost for the policy year ending June 30, 2021 is $500. See Note 10 for further information regarding our relationships, agreements and transactions with Five Star and Note 6 for further information regarding our investment in Five Star.

As of September 30, 2020, ABP Acquisition LLC, a subsidiary of ABP Trust, the controlling shareholder of RMR Inc., together with ABP Trust, owned approximately 6.4% of Five Star's outstanding common shares. RMR LLC provides management services to both us and Five Star and Adam Portnoy is the chair of the board of directors and a managing director of Five Star. Jennifer Clark is a managing director and the secretary of Five Star. Five Star's president and chief executive officer and executive vice president, chief financial officer and treasurer are officers and employees of RMR LLC.

Our Manager, RMR LLC. We have two agreements with RMR LLC to provide management services to us. RMR LLC also leases office space from us pursuant to a lease agreement that is terminable on 30 days' notice, subject to certain conditions. See Note 11 for further information regarding our management agreements with RMR LLC.

See Note 8 for information relating to the annual share awards we made in September 2020 to our officers and certain other employees of RMR LLC and common shares we purchased from our officers and certain current and former officers and employees of RMR LLC in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares to them. We include amounts recognized as expense for share awards to RMR LLC employees in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss).

AIC. Until its dissolution in February 2020, we, ABP Trust, Five Star and four other companies to which RMR LLC provides management services owned Affiliates Insurance Company, or AIC, an Indiana insurance company, in equal amounts. Certain of our Trustees and certain directors or trustees of the other AIC shareholders served on the board of directors of AIC until its dissolution.

We and the other AIC shareholders historically participated in a combined property insurance program arranged and insured or reinsured in part by AIC. The policies under that program expired on June 30, 2019, and we and the other AIC shareholders elected not to renew the AIC property insurance program; we have instead purchased standalone property insurance coverage with unrelated third party insurance providers.

As of each of September 30, 2020 and December 31, 2019, our investment in AIC had a carrying value of $11 and $298, respectively. These amounts are included in other assets, net in our condensed consolidated balance sheets. In June 2020, we received an additional liquidating distribution of approximately $287 from AIC in connection with its dissolution. We did not recognize any income related to our investment in AIC for the three and nine months ended September 30, 2020 and recognized

$83 and $617 related to our investment in AIC for the three and nine months ended September 30, 2019, respectively. These amounts are presented as equity in earnings of an investee in our condensed consolidated statements of comprehensive income (loss). Our other comprehensive income (loss) included our proportionate share of unrealized gains (losses) on securities that were owned by AIC, related to our investment in AIC.

For further information about these and other such relationships and certain other related person transactions, see our Annual Report.

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Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesWe have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, and, as such, are generally not subject to federal and most state income taxation on our operating income provided we distribute our taxable income to our shareholders and meet certain organization and operating requirements. We do, however, lease our managed senior living communities to our wholly owned TRSs that, unlike most of our subsidiaries, file a separate consolidated federal corporate income tax return and are subject to federal and state income taxes. Our consolidated income tax provision includes the income tax provision related to the operations of our TRSs and certain state income taxes we incur despite our taxation as a REIT. During the three months ended September 30, 2020 and 2019, we recognized income tax expense of $365 and benefit of $146, respectively, and during the nine months ended September 30, 2020 and 2019, we recognized income tax expense of $1,048 and benefit of $47, respectively.

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Weighted Average Common Shares (share amounts in thousands)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Weighted Average Common Shares (share amounts in thousands)	Weighted Average Common Shares (share amounts in thousands)We calculate basic earnings per common share by dividing net income (loss) by the weighted average number of our common shares outstanding during the period. We calculate diluted earnings per share using the more dilutive of the two class method or the treasury stock method. Unvested share awards and other potentially dilutive common shares, and the related impact on earnings, are considered when calculating diluted earnings per share. For the three months ended September 30, 2020 and 2019, 237 and 42 unvested common shares, respectively, and for the nine months ended September 30, 2020 and 2019, 235 and 26 unvested common shares, respectively, were not included in the calculation of diluted earnings per share because to do so would have been antidilutive.

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Recent Events and Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires that entities use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowance for credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. We adopted this standard which was effective as of January 1, 2020 using the modified retrospective approach. The implementation of this standard did not have a material impact in our condensed consolidated financial statements.

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Real Estate Properties (Tables)

9 Months Ended

Sep. 30, 2020

Real Estate [Abstract]

Schedule of Real Estate Properties

Date of Sale	Location	Type of Property	Number of Properties	Square Feet or Number of Units		Sales Price (1)		Gain (loss) on Sale		Impairment of Assets
January 2020	Louisiana	Medical Office	6	40,575	sq. ft.	$	5,925	$	(81)	$	—
February 2020	Pennsylvania	Medical Office	1	50,000	sq. ft.	2,900		—		(47)
March 2020	Texas	Medical Office	1	70,229	sq. ft.	8,779		2,863		—
April 2020	California	Managed Senior Living	3	599	units	47,000		(168)		5,465
June 2020	South Carolina	Medical Office	1	49,242	sq. ft.	3,550		—		2,753
July 2020	Texas	Medical Office	1	6,849	sq. ft.	2,072		(30)		—
July 2020	Connecticut	Medical Office	1	32,162	sq. ft.	625		(25)		267
August 2020	Mississippi	Managed Senior Living	2	116	units	2,500		(42)		227
September 2020	Mississippi	Medical Office	1	78,747	sq. ft.	7,250		(114)		148
			17			$	80,601	$	2,403	$	8,813

(1)Sales price excludes closing costs.

As of September 30, 2020, we had 22 properties classified as held for sale in our condensed consolidated balance sheet as follows:

Type of Property	Number of Properties	Gross Book Value		Impairment of Assets(1)
Managed Senior Living	14	$	52,958	$	33,356
Medical Office	5	69,230		1,524
Triple Net Leased, Senior Living	3	43,603		—
	22	$	165,791	$	34,880

(1)We recorded an aggregate of $34,880 impairment of real estate during the nine months ended September 30, 2020 to adjust the carrying values of certain of these properties to their estimated fair values less costs to sell.

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Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Recurring and Nonrecurring Measured at Fair Value

The following table presents certain of our assets that are measured at fair value at September 30, 2020, categorized by the level of inputs as defined in the fair value hierarchy under GAAP, used in the valuation of each asset.

			Fair Value at Reporting Date Using
			Quoted Prices in  Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total		(Level 1)		(Level 2)		(Level 3)
Recurring Fair Value Measurements Assets:
Investment in Five Star (1)	$	54,207	$	54,207	$	—	$	—
Non-Recurring Fair Value Measurements Assets:
Real estate properties held for sale (2)	$	56,673	$	—	$	56,673	$	—
Real estate properties at fair value (3)	$	31,010	$	—	$	—	$	31,010

(1)Our 10,691,658 shares of common stock of Five Star Senior Living Inc., or Five Star, are included in other assets, net in our condensed consolidated balance sheets, and are reported at fair value, which is based upon quoted market prices on The Nasdaq Stock Market LLC, or Nasdaq, (Level 1 inputs). On April 1, 2019, we entered into a transaction agreement with Five Star, or the Transaction Agreement, to restructure our business arrangements with Five Star, or the Restructuring Transaction. Pursuant to the Transaction Agreement, on January 1, 2020, Five Star issued 10,268,158 Five Star common shares to us. The fair value and initial cost basis of the Five Star common shares issued to us on January 1, 2020 was $38,095. Our adjusted cost basis inclusive of the 423,500 Five Star common shares we owned as of December 31, 2019 and the 10,268,158 Five Star common shares issued to us on January 1, 2020 was $44,448 as of September 30, 2020. During the three and nine months ended September 30, 2020, we recorded unrealized gains of $12,510 and $14,541, respectively, which is included in gains and losses on equity securities, net in

our condensed consolidated statements of comprehensive income (loss), to adjust the carrying value of our investment in Five Star common shares to their fair value. See Note 12 for further information about our investment in Five Star.

(2)We have assets in our condensed consolidated balance sheets that are measured at fair value on a nonrecurring basis. During the nine months ended September 30, 2020, we recorded impairment charges of $1,524 to reduce the carrying value of one medical office property that is classified as held for sale to its estimated sales price, less estimated costs to sell of $160, based on the sales price under a purchase and sale agreement that we have entered into with a third party buyer for this medical office property of $3,875. We also recorded impairment charges of $33,356 to reduce the carrying value of 14 senior living communities that are classified as held for sale to their estimated sales price, less estimated costs to sell of $1,142, based on the aggregate sales prices under the purchase and sale agreements that we have entered into with third party buyers for these senior living communities of $54,100. See Note 3 for further information about impairment charges and these and other properties we have classified as held for sale.

(3)We recorded impairment charges of $59,847 to reduce the carrying value of nine of our senior living communities scheduled for closure and/or sale to their estimated fair value of $31,010 based upon a combination of the market approach and the income approach and unobservable inputs such as estimated market rent, operating expense assumptions, vacancy data and capitalization rates. We also engaged an external third party to assist us in our estimation of fair value of these communities. The valuation techniques and significant unobservable inputs used in the valuation of these communities are considered Level 3 inputs as defined in the fair value hierarchy under GAAP.

Schedule of Carrying Value and Fair Value of the Financial Instruments

The fair values of these financial instruments approximated their carrying values in our condensed consolidated financial statements as of such dates, except as follows:

	As of September 30, 2020				As of December 31, 2019
Description	Carrying Amount (1)		Estimated Fair Value		Carrying Amount (1)		Estimated Fair Value
Senior unsecured notes	$	2,606,550	$	2,558,483	$	1,820,681	$	1,890,386
Secured debts(2) (3)	692,385		705,503		697,729		697,142
	$	3,298,935	$	3,263,986	$	2,518,410	$	2,587,528

(1)Includes unamortized debt issuance costs, premiums and discounts.

(2)We assumed certain of these secured debts in connection with our acquisition of certain properties. We recorded the assumed mortgage notes at estimated fair value on the date of acquisition and we are amortizing the fair value adjustments, if any, to interest expense over the respective terms of the mortgage notes to adjust interest expense to the estimated market interest rates as of the date of acquisition.

(3)Includes $3,015 of principal mortgage obligations and $25 of unamortized debt issuance costs for properties classified as held for sale as of December 31, 2019. These debts are included in liabilities of properties held for sale in our condensed consolidated balance sheet as of December 31, 2019.

Marketable Securities

Realized and unrealized gains and losses for our equity securities for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Realized gains and losses on equity securities sold (1)	$	—	$	—	$	—	$	(41,436)
Unrealized gains and losses on equity securities held	12,510		40		14,541		(40)
Gains and losses on equity securities, net	$	12,510	$	40	$	14,541	$	(41,476)

(1)This amount relates to our sale of our former investment in The RMR Group Inc., or RMR Inc., on July 1, 2019. For further information about our former investment in RMR Inc. see our Annual Report.

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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2020

Stockholders' Equity Note [Abstract]

Schedule of Shares Awards and Purchases

During the nine months ended September 30, 2020, we awarded our common shares, valued at the closing price of our common shares on Nasdaq on the applicable award date, as follows:

Date Awarded	Number of Shares	Price per Share
May 19, 2020 (1)	60,000	$	2.94
September 17, 2020 (2)	360,000	$	3.77

(1)In accordance with our Trustee compensation arrangements, we awarded to each of our six Trustees 10,000 of our common shares.

(2)We awarded under our equity compensation plan an aggregate of 360,000 of our common shares to our officers and certain other employees of RMR LLC.

During the nine months ended September 30, 2020, we purchased our common shares from our officers and certain current and former officers and employees of RMR LLC in satisfaction of tax withholding and payment obligations in connection with the vesting of awards of our common shares, valued at the closing price of our common shares on Nasdaq on the purchase dates, as follows:

Date Purchased	Number of Shares	Price per Share
January 9, 2020	1,938	$	8.10
March 13, 2020	1,500	$	3.79
June 30, 2020	1,757	$	4.43
September 21, 2020	42,180	$	3.38

Schedule of Dividends Declared and Paid

During the nine months ended September 30, 2020, we declared and paid quarterly distributions to common shareholders as follows:

Record Date	Payment Date	Distribution Per Share		Total Distributions
January 27, 2020	February 20, 2020	$	0.15	$	35,684
April 13, 2020	May 21, 2020	$	0.01	$	2,379
July 27, 2020	August 20, 2020	$	0.01	$	2,380

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of segment reporting information

	For the Three Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	94,235	$	—	$	10,003	$	104,238
Residents fees and services	—		290,101		—		290,101
Total revenues	94,235		290,101		10,003		394,339
Expenses:
Property operating expenses	33,448		282,202		—		315,650
Depreciation and amortization	32,816		31,570		2,825		67,211
General and administrative	—		—		6,988		6,988
Acquisition and certain other transaction related costs	—		—		53		53
Impairment of assets	1,334		62,868		—		64,202
Total expenses	67,598		376,640		9,866		454,104
Loss on sale of properties	(169)		(42)		—		(211)
Gains on equity securities, net	—		—		12,510		12,510
Interest and other income	—		—		134		134
Interest expense	(6,068)		(552)		(51,471)		(58,091)
Income (loss) from continuing operations before income tax expense	20,400		(87,133)		(38,690)		(105,423)
Income tax expense	—		—		(365)		(365)
Net income (loss)	20,400		(87,133)		(39,055)		(105,788)
Net income attributable to noncontrolling interest	(1,100)		—		—		(1,100)
Net income (loss) attributable to common shareholders	$	19,300	$	(87,133)	$	(39,055)	$	(106,888)

(1)Residents fees and services for the three months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the three months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

	For the Nine Months Ended September 30, 2020
	Office Portfolio		SHOP (1)		Non-Segment		Consolidated
Revenues:
Rental income	$	288,515	$	—	$	32,428	$	320,943
Residents fees and services	—		926,174		—		926,174
Total revenues	288,515		926,174		32,428		1,247,117
Expenses:
Property operating expenses	97,047		837,103		—		934,150
Depreciation and amortization	97,213		98,385		8,868		204,466
General and administrative	—		—		23,132		23,132
Acquisition and certain other transaction related costs	—		—		803		803
Impairment of assets	8,090		98,521		—		106,611
Total expenses	202,350		1,034,009		32,803		1,269,162
Gain (loss) on sale of properties	2,613		(210)		—		2,403
Gains on equity securities, net	—		—		14,541		14,541
Interest and other income	—		7,346		662		8,008
Interest expense	(18,140)		(1,676)		(123,899)		(143,715)
Gain on lease termination	—		—		22,896		22,896
Loss on early extinguishment of debt	(401)		—		(26)		(427)
Income (loss) from continuing operations before income tax expense	70,237		(102,375)		(86,201)		(118,339)
Income tax expense	—		—		(1,048)		(1,048)
Net income (loss)	70,237		(102,375)		(87,249)		(119,387)
Net income attributable to noncontrolling interest	(3,838)		—		—		(3,838)
Net income (loss) attributable to common shareholders	$	66,399	$	(102,375)	$	(87,249)	$	(123,225)

(1)Residents fees and services for the nine months ended September 30, 2020 for our SHOP segment is net of a $4,005 reserve for an estimated Medicare refund we expect to pay. Property operating expenses for the nine months ended September 30, 2020 for our SHOP segment includes $2,167 of estimated penalties, compliance costs and professional fees, net of management fees reimbursable by Five Star, related to the Medicare refund we expect to pay.

	As of September 30, 2020
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,105,760	$	2,914,966	$	514,392	$	6,535,118

	For the Three Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	100,010	$	32,738	$	15,263	$	148,011
Residents fees and services	—		107,816		—		107,816
Total revenues	100,010		140,554		15,263		255,827
Expenses:
Property operating expenses	34,184		90,899		—		125,083
Depreciation and amortization	33,801		34,901		4,666		73,368
General and administrative	—		—		9,604		9,604
Acquisition and certain other transaction related costs	—		—		2,492		2,492
Impairment of assets	26,037		718		6,344		33,099
Total expenses	94,022		126,518		23,106		243,646
Gain on sale of properties	4,183		—		—		4,183
Gains on equity securities, net	—		—		40		40
Interest and other income	—		—		238		238
Interest expense	(6,239)		(585)		(37,993)		(44,817)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	3,932		13,451		(45,558)		(28,175)
Income tax benefit	—		—		146		146
Equity in earnings of an investee	—		—		83		83
Net income (loss)	3,932		13,451		(45,329)		(27,946)
Net income attributable to noncontrolling interest	(1,444)		—		—		(1,444)
Net income (loss) attributable to common shareholders	$	2,488	$	13,451	$	(45,329)	$	(29,390)

	For the Nine Months Ended September 30, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Revenues:
Rental income	$	307,616	$	105,451	$	46,282	$	459,349
Residents fees and services	—		324,767		—		324,767
Total revenues	307,616		430,218		46,282		784,116
Expenses:
Property operating expenses	98,886		263,612		—		362,498
Depreciation and amortization	104,939		100,080		14,503		219,522
General and administrative	—		—		28,287		28,287
Acquisition and certain other transaction related costs	—		—		11,209		11,209
Impairment of assets	26,133		9,041		6,344		41,518
Total expenses	229,958		372,733		60,343		663,034
Gain on sale of properties	6,686		15,207		—		21,893
Dividend income	—		—		1,846		1,846
Losses on equity securities, net	—		—		(41,476)		(41,476)
Interest and other income	—		—		590		590
Interest expense	(18,257)		(2,481)		(116,102)		(136,840)
Loss on early extinguishment of debt	—		(17)		—		(17)
Income (loss) from continuing operations before income tax benefit and equity in earnings of an investee	66,087		70,194		(169,203)		(32,922)
Income tax benefit	—		—		47		47
Equity in earnings of an investee	—		—		617		617
Net income (loss)	66,087		70,194		(168,539)		(32,258)
Net income attributable to noncontrolling interest	(4,279)		—		—		(4,279)
Net income (loss) attributable to common shareholders	$	61,808	$	70,194	$	(168,539)	$	(36,537)

	As of December 31, 2019
	Office Portfolio		SHOP		Non-Segment		Consolidated
Total assets	$	3,165,577	$	3,044,989	$	443,260	$	6,653,826

XML

Leases and Management Agreements with Five Star (Tables)

9 Months Ended

Sep. 30, 2020

Risks and Uncertainties [Abstract]

Disaggregation of Revenue

The following table presents residents fees and services revenue disaggregated by type of contract and payer:

	Three Months Ended September 30,				Nine Months Ended September 30,
Revenue from contracts with customers:	2020		2019		2020		2019
Basic housing and support services	$	208,941	$	88,623	$	659,240	$	265,117
Medicare and Medicaid programs	38,882		6,902		131,460		23,333
Private pay and other third party payer SNF services	42,278		12,291		135,474		36,317
Total residents fees and services	$	290,101	$	107,816	$	926,174	$	324,767

XML

Basis of Presentation (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) property	Dec. 31, 2019 USD ($)
Basis Of Presentation [Line Items]
Assets	$ 6,535,118	$ 6,653,826
Liabilities	(3,893,412)	(3,776,776)
VIE, Primary Beneficiary
Basis Of Presentation [Line Items]
Assets	981,204	1,015,661
Liabilities	$ (698,667)	$ (704,344)
Joint Venture
Basis Of Presentation [Line Items]
Noncontrolling interest, ownership percentage by parent	45.00%
Ownership percentage	55.00%
Boston, MA | Joint Venture | Life Science Building
Basis Of Presentation [Line Items]
Number of properties included in joint venture agreement | property	1

XML

Recent Events and Accounting Pronouncements (Details) - USD ($)				1 Months Ended	7 Months Ended	9 Months Ended
	Aug. 20, 2020	May 21, 2020	Feb. 20, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Indebtedness
Dividend per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.15	$ 0.01	$ 0.01
Aggregate sales price						$ 78,244,000	$ 50,355,000
Term loan due 2022
Indebtedness
Debt face amount				$ 200,000,000	$ 200,000,000	200,000,000
Senior Unsecured Note Due March 2025
Indebtedness
Debt face amount				1,000,000,000	1,000,000,000	1,000,000,000
Unsecured revolving credit facility
Indebtedness
Unsecured revolving credit facility, maximum borrowing capacity				1,000,000,000	1,000,000,000	$ 1,000,000,000
Aggregate sales price					120,776,000
Sales price, agreement to sell					$ 167,392,000
Unrestricted cash or undrawn availability				$ 200,000,000

XML

Real Estate Properties - Narrative (Details) $ in Thousands		1 Months Ended		3 Months Ended			9 Months Ended
	Nov. 02, 2020 USD ($) property	Nov. 05, 2020 USD ($) trustee	Jan. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) property	Mar. 31, 2020 USD ($) building	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) building property	Sep. 30, 2019 USD ($)	Sep. 30, 2020 state	Sep. 30, 2020	Sep. 30, 2020 building
Real Estate Properties
Number of real estate properties | property				407			407
Number of states in which properties are located | state									37
Number of real estate properties scheduled for closure | property				10			10
Impairment of assets				$ 64,202		$ 33,099	$ 106,611	$ 41,518
Senior Living Community, Schedule For Closure Or Sale
Real Estate Properties
Number of real estate properties scheduled for closure | building											10
Held-for-sale
Real Estate Properties
Number of real estate properties held for sale				22			22				22
Aggregate sale price							$ 80,601
Impairment of assets							34,880
Held-for-sale | Medical Office Buildings
Real Estate Properties
Number of real estate properties | building					6
Number of real estate properties held for sale | building											5
Impairment of assets					$ 3,071		1,524
Held-for-sale | Senior Living Communities
Real Estate Properties
Number of real estate properties | building					1
Number of real estate properties held for sale | building											14
Impairment of assets							33,356
Held-for-sale | Triple Net Leased Senior Living Communities
Real Estate Properties
Number of real estate properties held for sale | building											3
Impairment of assets							0
Held-for-sale | Senior Living Community, Schedule For Closure Or Sale
Real Estate Properties
Number of real estate properties | building											9
Impairment of assets				$ 59,847			$ 59,847
Disposed of by Sale, Not Discontinued Operations
Real Estate Properties
Number of real estate properties sold | building							17
Impairment of assets							$ 8,813
Joint Venture
Real Estate Properties
Ownership percentage										55.00%
Joint Venture | Life Science Building
Real Estate Properties
Number of properties included in joint venture | property				1			1
Tempe, AZ | Land Parcel
Real Estate Properties
Aggregate purchase price			$ 2,600
Subsequent Event
Real Estate Properties
Aggregate sale price	$ 167,392
Number of properties under agreement to sell | property	21
Subsequent Event | Held-for-sale
Real Estate Properties
Aggregate sale price		$ 49,000
Subsequent Event | Held-for-sale | Senior Living Communities
Real Estate Properties
Number of real estate properties sold | trustee		1
Subsequent Event | Held-for-sale | Triple Net Leased Senior Living Communities
Real Estate Properties
Number of real estate properties sold | trustee		3

XML

Real Estate Properties - Schedule of Real Estate Properties (Details) $ in Thousands	1 Months Ended								3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($) building living_unit	Aug. 31, 2020 USD ($) building living_unit	Jul. 31, 2020 USD ($) ft² building	Jun. 30, 2020 USD ($) ft² building	Apr. 30, 2020 USD ($) living_unit building	Mar. 31, 2020 USD ($) ft² building	Feb. 29, 2020 USD ($) ft² building	Jan. 31, 2020 USD ($) ft² building	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) building	Sep. 30, 2019 USD ($)	Sep. 30, 2020 property	Sep. 30, 2020 building
Real Estate [Line Items]
Impairment of Assets									$ 64,202		$ 33,099	$ 106,611	$ 41,518
Disposed of by Sale, Not Discontinued Operations
Real Estate [Line Items]
Number of real estate properties sold | building												17
Gain (loss) on Sale												$ 2,403
Impairment of Assets												8,813
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Louisiana
Real Estate [Line Items]
Number of real estate properties sold | building								6
Square Feet | ft²								40,575
Sales Price								$ 5,925
Gain (loss) on Sale								(81)
Impairment of Assets								$ 0
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Pennsylvania
Real Estate [Line Items]
Number of real estate properties sold | building							1
Square Feet | ft²							50,000
Sales Price							$ 2,900
Gain (loss) on Sale							0
Impairment of Assets							$ (47)
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Texas
Real Estate [Line Items]
Number of real estate properties sold | building			1			1
Square Feet | ft²			6,849			70,229
Sales Price			$ 2,072			$ 8,779
Gain (loss) on Sale			(30)			2,863
Impairment of Assets			$ 0			$ 0
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | South Carolina
Real Estate [Line Items]
Number of real estate properties sold | building				1
Square Feet | ft²				49,242
Sales Price				$ 3,550
Gain (loss) on Sale				0
Impairment of Assets				$ 2,753
Disposed of by Sale, Not Discontinued Operations | Medical Office Buildings | Connecticut
Real Estate [Line Items]
Number of real estate properties sold | building			1
Square Feet | ft²			32,162
Sales Price			$ 625
Gain (loss) on Sale			(25)
Impairment of Assets			$ 267
Disposed of by Sale, Not Discontinued Operations | Senior Living Communities | California
Real Estate [Line Items]
Number of real estate properties sold | building					3
Number of Units | living_unit					599
Sales Price					$ 47,000
Gain (loss) on Sale					(168)
Impairment of Assets					$ 5,465
Disposed of by Sale, Not Discontinued Operations | Senior Living Communities | Mississippi
Real Estate [Line Items]
Number of real estate properties sold | building	1	2
Number of Units | living_unit	78,747	116
Sales Price	$ 7,250	$ 2,500
Gain (loss) on Sale	(114)	(42)
Impairment of Assets	148	$ 227
Held-for-sale
Real Estate [Line Items]
Sales Price												80,601
Impairment of Assets												34,880
Number of real estate properties held for sale														22	22
Gross Book Value	165,791								165,791			165,791
Held-for-sale | Medical Office Buildings
Real Estate [Line Items]
Impairment of Assets										$ 3,071		1,524
Number of real estate properties held for sale | building															5
Gross Book Value	69,230								69,230			69,230
Held-for-sale | Senior Living Communities
Real Estate [Line Items]
Impairment of Assets												33,356
Number of real estate properties held for sale | building															14
Gross Book Value	52,958								52,958			52,958
Held-for-sale | Triple Net Leased Senior Living Communities
Real Estate [Line Items]
Impairment of Assets												0
Number of real estate properties held for sale | building															3
Gross Book Value	$ 43,603								$ 43,603			$ 43,603

XML

Leases Leases - (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Nov. 02, 2020
Lessee, Lease, Description [Line Items]
Straight line rental income	$ 491	$ 1,186	$ 3,029	$ 3,550
Straight line rental income, excluding properties held-for-sale			102,691		$ 99,297
Variable lease, payment	18,501	19,317	56,792	57,687
Reimbursement revenue lease	1,428	$ 1,506	3,522	$ 3,906
Increase in accounts receivable			4,467
Operating lease, right-of-use asset	4,256		4,256		4,319
Operating lease, liability	$ 4,423		$ 4,423		$ 4,461
Subsequent Event
Lessee, Lease, Description [Line Items]
Deferred rent credit						$ 2,152

XML

Indebtedness (Details)				1 Months Ended				3 Months Ended		5 Months Ended	7 Months Ended	9 Months Ended
	Aug. 20, 2020 $ / shares	May 21, 2020 $ / shares	Feb. 20, 2020 $ / shares	Jun. 30, 2020 USD ($) $ / shares	May 31, 2020 USD ($) property	Apr. 30, 2020 USD ($)	Feb. 29, 2020 USD ($) property	Sep. 30, 2020 USD ($) property	Sep. 30, 2019 USD ($)	Jun. 02, 2020	Sep. 30, 2020 USD ($) property $ / shares	Sep. 30, 2020 USD ($) property	Sep. 30, 2019 USD ($)	Nov. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)
Indebtedness
Total real estate properties, gross								$ 7,371,731,000			$ 7,371,731,000	$ 7,371,731,000			$ 7,461,586,000
Real estate property, accumulated depreciation								1,651,864,000			1,651,864,000	1,651,864,000			1,570,801,000
Unsecured revolving credit facility								0			$ 0	0			$ 537,500,000
Loss on early extinguishment of debt								$ 0	$ 0			$ 427,000	$ 17,000
Dividend per share (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.15	$ 0.01							$ 0.01
Joint Venture
Indebtedness
Ownership percentage								55.00%			55.00%	55.00%
LIBOR
Indebtedness
Interest rate premium increase (as a percent)				0.50%
Unsecured revolving credit facility
Indebtedness
Unsecured revolving credit facility, maximum borrowing capacity				$ 1,000,000,000				$ 1,000,000,000			$ 1,000,000,000	$ 1,000,000,000
Line of credit facility, periodic payment, principal												$ 0
Revolving credit facility, interest rate payable (as a percent)								2.60%			2.60%	2.60%
Debt instrument, facility fee (as a percent)												0.30%
Weighted average interest rate on debt (as a percent)								2.60%	3.50%			2.20%	3.50%
Unsecured revolving credit facility				200,000,000				$ 0			$ 0	$ 0
Revolving credit facility, available amount								1,000,000,000			1,000,000,000	1,000,000,000
Unsecured revolving credit facility | Subsequent Event
Indebtedness
Unsecured revolving credit facility														$ 0
Revolving credit facility, available amount														$ 1,000,000,000
Mortgages
Indebtedness
Aggregate principal amount of mortgage debt								$ 684,962,000			$ 684,962,000	$ 684,962,000
Number of properties mortgaged | property								7			7	7
Total real estate properties, gross								$ 946,037,000			$ 946,037,000	$ 946,037,000
Mortgages | Joint Venture
Indebtedness
Aggregate principal amount of mortgage debt								$ 620,000,000			$ 620,000,000	$ 620,000,000
Ownership percentage								55.00%			55.00%	55.00%
Finance Leases
Indebtedness
Number of properties mortgaged | property								2			2	2
Total real estate properties, gross								$ 35,611,000			$ 35,611,000	$ 35,611,000
Lease obligations								8,084,000			8,084,000	8,084,000
Real estate property, accumulated depreciation								17,429,000			17,429,000	17,429,000
Term loan due 2022
Indebtedness
Debt face amount				200,000,000				$ 200,000,000			$ 200,000,000	$ 200,000,000
Weighted average interest rate on debt (as a percent)								2.70%	3.60%			2.70%	3.80%
Interest rate (as a percent)								2.80%			2.80%	2.80%
Term loan due 2020
Indebtedness
Debt face amount				250,000
Weighted average interest rate on debt (as a percent)										2.40%
Loss on early extinguishment of debt												$ 26,000
Senior Unsecured Note Due 2020
Indebtedness
Interest rate (as a percent)						6.75%
Principal amount plus accrued and unpaid interest						$ 200,000,000
Unpaid interest						$ 6,750,000
Mortgage 7.49 Percent Due January 2022 | Medical Office Buildings
Indebtedness
Interest rate (as a percent)					7.49%
Number of properties | property					1
Repayments of debt					$ 1,213,000
Loss on early extinguishment of debt												155,000
Senior Unsecured Note Due March 2025
Indebtedness
Debt face amount				$ 1,000,000,000				$ 1,000,000,000			$ 1,000,000,000	1,000,000,000
Interest rate (as a percent)				9.75%
Proceeds from debt				$ 982,300,000
Redemption percentage, maximum				40.00%
Outstanding percentage, maximum				50.00%
Senior Unsecured Note Due March 2026 | Life Science Building
Indebtedness
Interest rate (as a percent)							6.25%
Number of properties | property							1
Repayments of debt							$ 1,554,000
Loss on early extinguishment of debt												246,000
Unsecured Debt
Indebtedness
Debt face amount								2,650,000,000			2,650,000,000	2,650,000,000
Term Loan
Indebtedness
Debt face amount								$ 200,000,000			$ 200,000,000	$ 200,000,000

XML

Fair Value of Assets and Liabilities - Assets and Liabilities (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) property shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) property shares	Sep. 30, 2019 USD ($)	Jan. 01, 2020 USD ($) shares	Dec. 31, 2019 shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common shares of beneficial interest, shares issued (in shares) | shares	238,268,478		238,268,478			237,897,163
Common shares of beneficial interest, shares outstanding (in shares) | shares	238,268,478		238,268,478			237,897,163
Unrealized gains and losses on equity securities held	$ 12,510	$ 40	$ 14,541	$ (40)
Impairment of assets	$ 64,202	$ 33,099	$ 106,611	$ 41,518
Number of real estate properties | property	407		407
Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common shares of beneficial interest, shares issued (in shares) | shares					10,268,158	10,268,158
Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities investment (in shares) | shares	10,691,658		10,691,658
Initial cost basis	$ 44,448		$ 44,448		$ 38,095
Common shares of beneficial interest, shares outstanding (in shares) | shares						423,500
Unrealized gains and losses on equity securities held	12,510		14,541
Recurring | Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliates, fair value	54,207		54,207
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliates, fair value	54,207		54,207
Recurring | Significant Other Observable Inputs (Level 2) | Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliates, fair value	0		0
Recurring | Significant Unobservable Inputs (Level 3) | Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in affiliates, fair value	0		0
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate properties held for sale	56,673		56,673
Real estate properties at fair value	31,010		31,010
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate properties held for sale	0		0
Real estate properties at fair value	0		0
Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate properties held for sale	56,673		56,673
Real estate properties at fair value	0		0
Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate properties held for sale	0		0
Real estate properties at fair value	$ 31,010		$ 31,010
Common Shares | Five Star
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities investment (in shares) | shares	10,691,658		10,691,658
Medical Office Buildings | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Sale price less estimated cost to sell	$ 3,875		$ 3,875
Medical Office Buildings | Held-for-sale, Not Discontinued Operations | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets			$ 1,524
Number of real estate properties held for sale | property	1		1
Sale price less estimated cost to sell	$ 160		$ 160
Senior Living Communities | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate properties at fair value	31,010		31,010
Impairment of assets			59,847
Sale price less estimated cost to sell	$ 54,100		$ 54,100
Number of real estate properties | property	9		9
Senior Living Communities | Held-for-sale, Not Discontinued Operations | Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets			$ 33,356
Number of real estate properties held for sale | property	14		14
Sale price less estimated cost to sell	$ 1,142		$ 1,142

XML

Fair Value of Assets and Liabilities - Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Secured debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal mortgage obligations		$ 3,015
Debt issuance costs		25
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	$ 3,298,935	2,518,410
Carrying Amount | Senior unsecured notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	2,606,550	1,820,681
Carrying Amount | Secured debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	692,385	697,729
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	3,263,986	2,587,528
Estimated Fair Value | Senior unsecured notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	2,558,483	1,890,386
Estimated Fair Value | Secured debts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure	$ 705,503	$ 697,142

XML

Fair Value of Assets and Liabilities - Narrative (Details)	Sep. 30, 2020 debt_security
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurement, number of debt securities	2
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurement, number of debt securities	4

XML

Fair Value of Assets and Liabilities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Realized gains and losses on equity securities sold	$ 0	$ 0	$ 0	$ (41,436)
Unrealized gains and losses on equity securities held	12,510	40	14,541	(40)
Gains and losses on equity securities, net	$ 12,510	$ 40	$ 14,541	$ (41,476)

XML

Noncontrolling Interest (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) property	Sep. 30, 2019 USD ($)
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interest	$ (1,100)	$ (1,444)	$ (3,838)	$ (4,279)
Cash distribution for joint venture partners	5,324	$ 5,107	16,707	$ 16,294
Variable interest entity, consolidated, carrying amount, real estate assets	710,001		710,001
Variable interest entity, consolidated, carrying amount, mortgage debt	$ 620,000		$ 620,000
Joint Venture
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners	45.00%		45.00%
Ownership percentage	55.00%		55.00%
Boston, MA | Life Science Building | Joint Venture
Noncontrolling Interest [Line Items]
Number of properties included in joint venture agreement | property			1

XML

Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands					9 Months Ended
	Oct. 26, 2020	Aug. 20, 2020	May 21, 2020	Feb. 20, 2020	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distributions to shareholders		$ 2,380	$ 2,379	$ 35,684	$ 40,443	$ 164,034
Common shares issued (in shares)					238,268,478			237,897,163
Common shares value					$ 2,383			$ 2,379
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distributions to common shareholders declared (in dollars per share)	$ 0.01
Distributions to shareholders	$ 2,382
Five Star
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued (in shares)							10,268,158	10,268,158
Shareholders | Five Star
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued (in shares)							16,118,849	16,118,849
Common shares value							$ 59,801

XML

Shareholders' Equity - Share Awards and Purchases (Details)	Sep. 21, 2020 $ / shares shares	Sep. 17, 2020 $ / shares shares	Jun. 30, 2020 $ / shares shares	May 19, 2020 trustee $ / shares shares	Mar. 13, 2020 $ / shares shares	Jan. 09, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares)		360,000		60,000
Price Per Share (in dollars per share) | $ / shares		$ 3.77		$ 2.94
Trustees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares)				10,000
Number of trustees | trustee				6
Employees Of RMR LLC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares)		360,000
Former Employees Of RMR LLC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased during period (in shares)	42,180		1,757		1,500	1,938
Shares purchased for tax withholding and payment obligations (in dollars per share) | $ / shares	$ 3.38		$ 4.43		$ 3.79	$ 8.10

XML

Shareholders' Equity - Schedule of Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended	7 Months Ended	9 Months Ended
	Aug. 20, 2020	May 21, 2020	Feb. 20, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Dividend per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.15	$ 0.01	$ 0.01
Total distributions	$ 2,380	$ 2,379	$ 35,684			$ 40,443	$ 164,034

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Segment Reporting (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment reporting
Number of operating segments | segment							2
Revenues:
Total revenues	$ 394,339			$ 255,827			$ 1,247,117	$ 784,116
Expenses:
Property operating expenses	315,650			125,083			934,150	362,498
Depreciation and amortization	67,211			73,368			204,466	219,522
General and administrative	6,988			9,604			23,132	28,287
Acquisition and certain other transaction related costs	53			2,492			803	11,209
Impairment of assets	64,202			33,099			106,611	41,518
Total expenses	454,104			243,646			1,269,162	663,034
Gain (loss) on sale of properties	(211)			4,183			2,403	21,893
Dividend income	0			0			0	1,846
Gains (loss) on equity securities, net	12,510			40			14,541	(41,476)
Interest and other income	134			238			8,008	590
Interest expense	(58,091)			(44,817)			(143,715)	(136,840)
Gain on lease termination	0			0			22,896	0
Loss on early extinguishment of debt	0			0			(427)	(17)
Income (loss) from continuing operations before income tax expense	(105,423)			(28,175)			(118,339)	(32,922)
Income tax expense (benefit)	(365)			146			(1,048)	47
Equity in earnings of an investee	0			83			0	617
Net income (loss)	(105,788)	$ (24,742)	$ 11,143	(27,946)	$ (35,816)	$ 31,504	(119,387)	(32,258)
Net income attributable to noncontrolling interest	(1,100)			(1,444)			(3,838)	(4,279)
Net income (loss) attributable to common shareholders	(106,888)			(29,390)			(123,225)	(36,537)
Total assets	6,535,118						6,535,118		$ 6,653,826
Operating Segments | Office Portfolio
Revenues:
Total revenues	94,235			100,010			288,515	307,616
Expenses:
Property operating expenses	33,448			34,184			97,047	98,886
Depreciation and amortization	32,816			33,801			97,213	104,939
General and administrative	0			0			0	0
Acquisition and certain other transaction related costs	0			0			0	0
Impairment of assets	1,334			26,037			8,090	26,133
Total expenses	67,598			94,022			202,350	229,958
Gain (loss) on sale of properties	(169)			4,183			2,613	6,686
Dividend income								0
Gains (loss) on equity securities, net	0			0			0	0
Interest and other income	0			0			0	0
Interest expense	(6,068)			(6,239)			(18,140)	(18,257)
Gain on lease termination							0
Loss on early extinguishment of debt							(401)	0
Income (loss) from continuing operations before income tax expense	20,400			3,932			70,237	66,087
Income tax expense (benefit)	0			0			0	0
Equity in earnings of an investee				0				0
Net income (loss)	20,400			3,932			70,237	66,087
Net income attributable to noncontrolling interest	(1,100)			(1,444)			(3,838)	(4,279)
Net income (loss) attributable to common shareholders	19,300			2,488			66,399	61,808
Total assets	3,105,760						3,105,760		3,165,577
Operating Segments | SHOP
Revenues:
Total revenues	290,101			140,554			926,174	430,218
Expenses:
Property operating expenses	282,202			90,899			837,103	263,612
Depreciation and amortization	31,570			34,901			98,385	100,080
General and administrative	0			0			0	0
Acquisition and certain other transaction related costs	0			0			0	0
Impairment of assets	62,868			718			98,521	9,041
Total expenses	376,640			126,518			1,034,009	372,733
Gain (loss) on sale of properties	(42)			0			(210)	15,207
Dividend income								0
Gains (loss) on equity securities, net	0			0			0	0
Interest and other income	0			0			7,346	0
Interest expense	(552)			(585)			(1,676)	(2,481)
Gain on lease termination							0
Loss on early extinguishment of debt							0	(17)
Income (loss) from continuing operations before income tax expense	(87,133)			13,451			(102,375)	70,194
Income tax expense (benefit)	0			0			0	0
Equity in earnings of an investee				0				0
Net income (loss)	(87,133)			13,451			(102,375)	70,194
Net income attributable to noncontrolling interest	0			0			0	0
Net income (loss) attributable to common shareholders	(87,133)			13,451			(102,375)	70,194
Total assets	2,914,966						2,914,966		3,044,989
Provider Relief Fund, CARES Act	15,459						15,459
Provider Relief Fund, expected HHS return, CARES Act	8,113						8,113
Non-Segment
Revenues:
Total revenues	10,003			15,263			32,428	46,282
Expenses:
Property operating expenses	0			0			0	0
Depreciation and amortization	2,825			4,666			8,868	14,503
General and administrative	6,988			9,604			23,132	28,287
Acquisition and certain other transaction related costs	53			2,492			803	11,209
Impairment of assets	0			6,344			0	6,344
Total expenses	9,866			23,106			32,803	60,343
Gain (loss) on sale of properties	0			0			0	0
Dividend income								1,846
Gains (loss) on equity securities, net	12,510			40			14,541	(41,476)
Interest and other income	134			238			662	590
Interest expense	(51,471)			(37,993)			(123,899)	(116,102)
Gain on lease termination							22,896
Loss on early extinguishment of debt							(26)	0
Income (loss) from continuing operations before income tax expense	(38,690)			(45,558)			(86,201)	(169,203)
Income tax expense (benefit)	(365)			146			(1,048)	47
Equity in earnings of an investee				83				617
Net income (loss)	(39,055)			(45,329)			(87,249)	(168,539)
Net income attributable to noncontrolling interest	0			0			0	0
Net income (loss) attributable to common shareholders	(39,055)			(45,329)			(87,249)	(168,539)
Total assets	514,392						514,392		$ 443,260
Rental income
Revenues:
Total revenues	104,238			148,011			320,943	459,349
Rental income | Operating Segments | Office Portfolio
Revenues:
Total revenues	94,235			100,010			288,515	307,616
Rental income | Operating Segments | SHOP
Revenues:
Total revenues	0			32,738			0	105,451
Rental income | Non-Segment
Revenues:
Total revenues	10,003			15,263			32,428	46,282
Residents fees and services
Revenues:
Total revenues	290,101			107,816			926,174	324,767
Residents fees and services | Operating Segments | Office Portfolio
Revenues:
Total revenues	0			0			0	0
Residents fees and services | Operating Segments | SHOP
Revenues:
Total revenues	290,101			107,816			926,174	324,767
Expenses:
Revenue reserve for inadequate documentation	4,005						4,005
Estimated penalties, compliance costs, and professional fees, net of management fees reimbursable	2,167						2,167
Residents fees and services | Non-Segment
Revenues:
Total revenues	$ 0			$ 0			$ 0	$ 0

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Leases and Management Agreements with Five Star - Narrative (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 01, 2019 USD ($)	Sep. 30, 2020 USD ($) property trustee building shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) building property trustee community renewal_option shares	Sep. 30, 2019 USD ($) community	Dec. 31, 2019 community shares	Jan. 01, 2020 shares	Feb. 01, 2019 USD ($)
Common shares of beneficial interest, shares issued (in shares) | shares		238,268,478		238,268,478		237,897,163
Gain on lease termination		$ 0	$ 0	$ 22,896	$ 0
Number of real estate properties scheduled for closure | property		10		10
Rental income		$ 393		$ 1,175
Senior Living Communities
Payments to acquire assets	$ 49,155				49,155
Five Star
Total rental income recognized				$ 75,000
Monthly minimum rent payable								$ 11,000
Management fees as percentage of gross revenues		5.00%		5.00%
Percentage of annual incentive fee		15.00%		15.00%
Percentage of gross revenues realized at all communities		1.50%		1.50%
Number of consecutive renewal terms of agreement | renewal_option				2
Property management agreement, renewal term				5 years
Percentage target EBITDA of new management agreement not earned				90.00%
Percentage target EBITDA of new management agreement not earned for all communities				20.00%
Amount of improvements to communities					$ 97,480
Five Star
Annual rent plus percentage		4.00%		4.00%
Five Star | Senior Living Communities
Number of communities managed by related party | community				239	77
Number of real estate properties inadequate documentation | trustee		1		1
Revenue reserve for inadequate documentation				$ 4,005
Estimated penalties, compliance costs, and professional fees, net of management fees reimbursable		$ 2,167		$ 2,167
Number of real estate properties scheduled for closure | building		10		10
Five Star
Common shares of beneficial interest, shares issued (in shares) | shares						10,268,158	10,268,158
Five Star | Shareholders
Common shares of beneficial interest, shares issued (in shares) | shares						16,118,849	16,118,849
Five Star
Number of communities leased by the company | community						166
Number of communities managed by related party | community						78
Total rental income recognized			32,738		$ 105,451
Investment owned, percentage of total shares outstanding		33.90%		33.90%
Annual rent as a percentage					538
Property management agreement expense		$ 15,182	$ 3,832	$ 47,937	$ 11,492
Five Star | Rental income | Rents from significant lessee | Investment
Percentage of rental income			12.80%		13.40%
Five Star | Rental Property Concentration | Rents from significant lessee | Investment
Percentage of rental income					27.00%
Five Star | Rehabilitation Services
Expenses from transactions with related party		$ 5,972	$ 1,478	$ 19,843	$ 4,666

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Leases and Management Agreements with Five Star - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 394,339	$ 255,827	$ 1,247,117	$ 784,116
Basic housing and support services
Disaggregation of Revenue [Line Items]
Revenues	208,941	88,623	659,240	265,117
Medicare and Medicaid programs
Disaggregation of Revenue [Line Items]
Revenues	38,882	6,902	131,460	23,333
Private pay and other third party payer SNF services
Disaggregation of Revenue [Line Items]
Revenues	42,278	12,291	135,474	36,317
Residents fees and services
Disaggregation of Revenue [Line Items]
Revenues	$ 290,101	$ 107,816	$ 926,174	$ 324,767

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Business and Property Management Agreements with RMR LLC (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) employee management_agreement	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) employee management_agreement	Sep. 30, 2019 USD ($)	Dec. 31, 2020
Related person transactions
Number of employees | employee	0		0
Property management and construction supervision fees	$ 3,477,000	$ 3,289,000	$ 10,076,000	$ 9,844,000
Property management and construction supervision fees paid	3,571,000	3,419,000	10,433,000	10,145,000
RMR LLC
Related person transactions
Business management fees incurred	5,004,000	6,616,000	15,614,000	20,917,000
Related party transaction business management fees related to subsidiary level management	725,000	725,000	2,175,000	2,175,000
Related party transaction business management agreement, annual incentive fee estimate included in management fees	$ 0	$ 0	$ 0	$ 0
Senior Living Communities | RMR Inc
Related person transactions
Number of management agreements | management_agreement	2		2
Subsequent Event | Scenario, Forecast | RMR LLC
Related person transactions
Period of actual amount of incentive fees					3 years

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Related Person Transactions (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) agreement shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) agreement shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Related person transactions
Proceeds from sale of equity method investments				$ 287	$ 0
Equity in earnings of an investee		$ 0	$ 83	$ 0	$ 617
Five Star
Related person transactions
Equity securities investment (in shares) | shares		10,691,658		10,691,658
Investment owned, percentage of total shares outstanding		33.90%		33.90%
RMR LLC
Related person transactions
Number of management agreements | agreement		2		2
AIC
Related person transactions
Equity method investments		$ 11		$ 11		$ 298
Proceeds from sale of equity method investments	$ 287
Equity in earnings of an investee		$ 83		617
Five Star
Related person transactions
Property insurance program costs				$ 500
RMR LLC | Five Star
Related person transactions
Investment owned, percentage of total shares outstanding		6.40%		6.40%

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 365	$ (146)	$ 1,048	$ (47)

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Weighted Average Common Shares (share amounts in thousands) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	237	42	235	26