Exhibit 99.2

CommonWealth REIT

Second Quarter 2010

Supplemental Operating and Financial Data

All amounts in this report are unaudited.

TABLE OF CONTENTS

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WARNING REGARDING

FORWARD LOOKING STATEMENTS

THIS SUPPLEMENTAL OPERATING AND FINANCIAL DATA CONTAINS STATEMENTS WHICH CONSTITUTE FORWARD LOOKING STATEMENTS WITHIN THE MEANING OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 AND OTHER FEDERAL SECURITIES LAWS.  WHENEVER WE USE WORDS SUCH AS “BELIEVE”, “EXPECT”, “ANTICIPATE”, “INTEND”, “PLAN”, “ESTIMATE” OR SIMILAR EXPRESSIONS, WE ARE MAKING FORWARD LOOKING STATEMENTS.  THESE FORWARD LOOKING STATEMENTS AND THEIR IMPLICATIONS ARE BASED UPON OUR PRESENT INTENT, BELIEFS OR EXPECTATIONS, BUT FORWARD LOOKING STATEMENTS AND THEIR IMPLICATIONS ARE NOT GUARANTEED TO OCCUR AND MAY NOT OCCUR.  FORWARD LOOKING STATEMENTS AND THEIR IMPLICATIONS IN THIS REPORT RELATE TO VARIOUS ASPECTS OF OUR BUSINESS, INCLUDING:

·                        THE CREDIT QUALITY OF OUR TENANTS,

·                        THE LIKELIHOOD THAT OUR TENANTS WILL PAY RENT, RENEW LEASES, SIGN NEW LEASES OR BE AFFECTED BY CYCLICAL ECONOMIC CONDITIONS,

·                        OUR ACQUISITIONS AND SALES OF PROPERTIES,

·                        OUR ABILITY TO COMPETE FOR ACQUISITIONS AND TENANCIES EFFECTIVELY,

·                        OUR ABILITY TO PAY INTEREST ON AND PRINCIPAL OF OUR DEBT,

·                        OUR ABILITY TO PAY DISTRIBUTIONS TO SHAREHOLDERS AND THE AMOUNT OF SUCH DISTRIBUTIONS,

·                        OUR POLICIES AND PLANS REGARDING INVESTMENTS AND FINANCINGS,

·                        THE FUTURE AVAILABILITY OF BORROWINGS UNDER, AND OUR ABILITY TO RENEW OR REFINANCE, OUR REVOLVING CREDIT FACILITY,

·                        OUR TAX STATUS AS A REAL ESTATE INVESTMENT TRUST, OR REIT,

·                        OUR ABILITY TO RAISE EQUITY OR DEBT, AND

·                        OTHER MATTERS.

OUR ACTUAL RESULTS MAY DIFFER MATERIALLY FROM THOSE CONTAINED IN OR IMPLIED BY OUR FORWARD LOOKING STATEMENTS AS A RESULT OF VARIOUS FACTORS.  FACTORS THAT COULD HAVE A MATERIAL ADVERSE EFFECT ON OUR FORWARD LOOKING STATEMENTS AND UPON OUR BUSINESS, RESULTS OF OPERATIONS, FINANCIAL CONDITION, FUNDS FROM OPERATIONS, CASH FLOWS, LIQUIDITY AND PROSPECTS INCLUDE, BUT ARE NOT LIMITED TO:

·                        THE IMPACT OF CHANGES IN THE ECONOMY AND THE CAPITAL MARKETS ON US AND OUR TENANTS,

·                        COMPETITION WITHIN THE REAL ESTATE INDUSTRY OR THOSE INDUSTRIES IN WHICH OUR TENANTS OPERATE,

·                        ACTUAL AND POTENTIAL CONFLICTS OF INTEREST WITH OUR MANAGING TRUSTEES AND OUR MANAGER, REIT MANAGEMENT & RESEARCH LLC, OR RMR, AND ITS RELATED ENTITIES AND CLIENTS,

·                        COMPLIANCE WITH, AND CHANGES TO, FEDERAL, STATE AND LOCAL LAWS AND REGULATIONS, ACCOUNTING RULES, TAX RATES AND SIMILAR MATTERS, AND

·                        LIMITATIONS IMPOSED ON OUR BUSINESS AND OUR ABILITY TO SATISFY COMPLEX RULES IN ORDER FOR US TO QUALIFY AS A REIT FOR U.S. FEDERAL INCOME TAX PURPOSES.

FOR EXAMPLE:

·                        IF THE AVAILIBILITY OF DEBT CAPITAL BECOMES MORE RESTRICTED, WE MAY BE UNABLE TO REFINANCE OR REPAY OUR DEBT OBLIGATIONS WHEN THEY BECOME DUE OR ON TERMS WHICH ARE AS FAVORABLE AS WE NOW HAVE,

·                        THE CURRENT HIGH UNEMPLOYMENT RATE IN THE U.S. MAY CONTINUE FOR A LONG TIME OR BECOME WORSE IN THE FUTURE.  SUCH CIRCUMSTANCES MAY FURTHER REDUCE DEMAND FOR LEASING OFFICE AND INDUSTRIAL SPACE.  IF THE DEMAND FOR LEASING OFFICE AND INDUSTRIAL SPACE REMAINS AT CURRENT LEVELS OR BECOMES FURTHER DEPRESSED, OCCUPANCY AND OPERATING RESULTS OF OUR PROPERTIES MAY DECLINE,

·                        SOME OF OUR TENANTS MAY NOT RENEW EXPIRING LEASES, AND WE MAY BE UNABLE TO LOCATE NEW TENANTS TO MAINTAIN THE HISTORICAL OCCUPANCY RATES OF OUR PROPERTIES,

·                        OUR AGREEMENTS TO ACQUIRE AND SELL PROPERTIES ARE SUBJECT TO VARIOUS TERMS AND CONDITIONS, AND THESE TERMS AND CONDITIONS MAY NOT BE MET.  AS A RESULT, SOME OR ALL OF THESE TRANSACTIONS MAY NOT OCCUR OR MAY BE DELAYED,

·                        OUR ABILITY TO MAKE FUTURE DISTRIBUTIONS DEPENDS UPON OUR FUTURE EARNINGS.  WE MAY BE UNABLE TO MAINTAIN OUR CURRENT RATE OF DISTRIBUTIONS AND FUTURE DISTRIBUTIONS MAY BE SUSPENDED OR PAID AT A LESSER RATE THAN THE DISTRIBUTIONS WE NOW PAY,

·                        OUR ABILITY TO GROW OUR BUSINESS AND INCREASE OUR DISTRIBUTIONS DEPENDS IN LARGE PART UPON OUR ABILITY TO BUY PROPERTIES AND LEASE THEM FOR RENTS THAT EXCEED OUR CAPITAL COSTS.  WE MAY BE UNABLE TO IDENTIFY PROPERTIES THAT WE WANT TO ACQUIRE OR TO NEGOTIATE ACCEPTABLE PURCHASE PRICES, ACQUISITION FINANCING OR LEASE TERMS FOR NEW PROPERTIES, AND

·                        THE DISTRIBUTIONS WE RECEIVE FROM OUR SHARES IN GOVERNMENT PROPERTIES INCOME TRUST, OR GOV, MAY DECLINE, OR WE MAY BE UNABLE TO SELL OUR GOV SHARES FOR AN AMOUNT EQUAL TO OUR CARRYING VALUE OF THOSE SHARES.

THESE RESULTS COULD OCCUR DUE TO MANY DIFFERENT CIRCUMSTANCES, SOME OF WHICH ARE BEYOND OUR CONTROL, SUCH AS CHANGES IN OUR TENANTS’ FINANCIAL CONDITIONS OR THE MARKET DEMAND FOR LEASED SPACE, OR CHANGES IN THE CAPITAL MARKETS OR THE ECONOMY GENERALLY.

THE INFORMATION CONTAINED ELSEWHERE IN OUR ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2009, OR OUR ANNUAL REPORT, AND SUBSEQUENT DOCUMENTS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IDENTIFIES OTHER FACTORS THAT COULD CAUSE DIFFERENCES FROM OUR FORWARD LOOKING STATEMENTS.  ALSO, OTHER IMPORTANT FACTORS THAT COULD CAUSE OUR ACTUAL RESULTS TO DIFFER MATERIALLY FROM THOSE IN OUR FORWARD LOOKING STATEMENTS ARE DESCRIBED MORE FULLY UNDER “RISK FACTORS” IN OUR ANNUAL REPORT.

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.

CORPORATE INFORMATION

CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

COMPANY PROFILE

The Company:

CommonWealth REIT, or CWH, is a real estate investment trust, or REIT, which primarily owns office and industrial buildings located throughout the United States.  The majority of our properties are office buildings located in suburban areas and central business districts, or CBDs, of major metropolitan markets.  As of June 30, 2010, we also owned 31.5 million square feet of industrial and other space, including 17.9 million square feet of leased industrial and commercial lands in Oahu, Hawaii.  We have been investment grade rated since 1994 and we are included in a number of financial indices, including the Russell 1000®, the MSCI US REIT Index, the S&P REIT Composite Index and the FTSE NAREIT Composite Index.

Strategy:

Our primary business strategy is to efficiently operate our properties to maintain high occupancies, at market rents, with strong credit quality tenants.  We attempt to maintain an investment portfolio that is balanced between “security” and “growth”.  The security part of our portfolio includes properties that are long term leased or leased to tenants we believe are likely to renew their occupancy, such as our leased lands in Hawaii.  The growth part of our portfolio includes our multi-tenant office buildings, which we believe may generate higher rents and appreciate in value in the future because of their physical qualities and locations.  Although we sometimes sell properties, we generally consider ourselves to be a long term investor and we are more interested in the long term earnings potential of our properties than selling properties for short term gains.  We currently do not have any investments in off balance sheet entities.

Management:

CWH is managed by Reit Management & Research LLC, or RMR.  RMR is a real estate management company which was founded in 1986 to manage public investments in real estate.  As of June 30, 2010, RMR managed one of the largest portfolios of publicly owned real estate in North America, including 1,370 properties, located in 45 states, Washington, DC, Puerto Rico and Ontario, Canada.  RMR has over 600 employees in its headquarters and regional offices located throughout the U.S.  In addition to managing CWH, RMR also manages Hospitality Properties Trust, or HPT, a publicly traded REIT that owns hotels and travel centers, Senior Housing Properties Trust, or SNH, a publicly traded REIT that primarily owns healthcare properties, and Government Properties Income Trust, or GOV, a publicly traded REIT that owns buildings majority leased to government tenants located throughout the U.S.  RMR also provides management services to Five Star Quality Care, Inc., a healthcare services company which is a tenant of SNH, and to TravelCenters of America LLC, an operator of travel centers which is a tenant of HPT.  An affiliate of RMR, RMR Advisors, Inc., is the investment manager of mutual funds which principally invests in securities of unaffiliated real estate companies.  The public companies managed by RMR and its affiliates had combined total gross assets of approximately $17.5 billion as of June 30, 2010.  We believe that being managed by RMR is a competitive advantage for CWH because RMR provides us with a depth and quality of management and experience which may be unequaled in the real estate industry.  We also believe RMR provides management services to CWH at costs that are lower than we would have to pay for similar quality services.

Corporate Headquarters:

400 Centre Street

Newton, MA  02458

(t)  (617) 332-3990

(f)  (617) 332-2261

Stock Exchange Listing:

New York Stock Exchange

NYSE Trading Symbols:

Common Stock — CWH

Preferred Stock Series B — CWH-PB

Preferred Stock Series C — CWH-PC

Preferred Stock Series D — CWH-PD

7.50% Senior Notes due 2019 — CWHN

Senior Unsecured Debt Ratings:

Moody’s — Baa2

Standard & Poor’s — BBB

Portfolio Data (as of 6/30/10) (1):

Portfolio Concentration by Property Type (1)(2):

Portfolio Concentration by Major Market (1)(2):

(1) Excludes properties classified in discontinued operations.

(2) We compute property net operating income, or NOI, as rental income from real estate less property operating expenses; see Exhibit A for the calculation of NOI and a reconciliation of NOI to Net Income.

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CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

INVESTOR INFORMATION

Board of Trustees

Senior Management

Contact Information

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CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

RESEARCH COVERAGE

Equity Research Coverage

CWH is followed by the analysts and its publicly held debt and preferred shares are rated by the rating agencies listed above.  Please note that any opinions, estimates or forecasts regarding CWH’s performance made by these analysts or agencies do not represent opinions, forecasts or predictions of CWH or its management.  CWH does not by its reference above imply its endorsement of or concurrence with any information, conclusions or recommendations provided by any of these analysts or agencies.

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FINANCIAL INFORMATION

CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

KEY FINANCIAL DATA (1)

(amounts in thousands, except per share data)

(1)   Amounts have been adjusted, where applicable, for a 1 for 4 reverse stock split that was effective on 7/1/10.

(2)   As of 6/30/2010, we had 15,180 preferred shares outstanding that were convertible into 7,298 common shares.  See Exhibit E for calculations of diluted net income, funds from operations, or FFO, and weighted average common shares outstanding.

(3)   The amounts stated are based on the amounts paid during the periods.

(4)   Gross book value of real estate assets is real estate properties, at cost, including acquisition costs, purchase price allocations less impairment writedowns, if any.

(5)   Prior periods reflect amounts previously reported and excludes retroactive adjustments for one property reclassified from discontinued operations during the fourth quarter of 2009.

(6)   Property net operating income, or NOI, is defined as rental income from real estate less property operating expenses; see Exhibit A for calculation of NOI and reconciliation of NOI to Net Income.

(7)   See Exhibit B for calculation of EBITDA.

(8)   NOI margin is defined as property net operating income, or NOI, as a percentage of rental income.

(9)   See Exhibit C for calculation of FFO and FFO available for common shareholders.

(10) See Exhibit D for calculation of CAD.

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CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

CONSOLIDATED BALANCE SHEETS

(amounts in thousands, except share data)

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CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

CONSOLIDATED STATEMENTS OF INCOME

(amounts in thousands, except per share data)

(1)   We report rental income on a straight line basis over the terms of the respective leases; rental income and income from discontinued operations includes non-cash straight line rent adjustments. Rental income and income from discontinued operations also includes non-cash amortization of intangible lease assets and liabilities.

(2)   As of 6/30/2010, we had 15,180 series D preferred shares outstanding that were convertible into 7,298 common shares.  See exhibit E for calculations of diluted net income and weighted average common shares outstanding.

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CommonWealth REIT

Supplemental Operating and Financial Data

June 30, 2010

CONSOLIDATED STATEMENTS OF CASH FLOWS

(amounts in thousands)