PART I: FINANCIAL INFORMATION

ITEM 1. Financial Statements

Corporate Office Properties Trust and Subsidiaries
Consolidated Balance Sheets
(Dollars in thousands)
(unaudited)

	June 30,			December 31,
	2006			2005
Assets
Investment in real estate:
Operating properties, net	$	1,743,651		$	1,631,038
Property held for sale, net	10,161			—
Projects under construction or development	310,195			255,617
Total commercial real estate properties, net	2,064,007			1,886,655
Investments in and advances to unconsolidated real estate joint ventures	1,509			1,451
Investment in real estate, net	2,065,516			1,888,106
Cash and cash equivalents	5,748			10,784
Restricted cash	21,073			21,476
Accounts receivable, net	15,446			15,606
Investment in other unconsolidated entity	1,621			1,621
Deferred rent receivable	36,638			32,579
Intangible assets on real estate acquisitions, net	100,132			90,984
Deferred charges, net	34,802			35,046
Prepaid and other assets	21,422			29,255
Furniture, fixtures and equipment, net	5,887			4,302
Fair value of derivatives	833			—
Total assets	$	2,309,118		$	2,129,759
Liabilities and shareholders’ equity
Liabilities:
Mortgage and other loans payable	$	1,433,718		$	1,348,351
Accounts payable and accrued expenses	46,040			41,693
Rents received in advance and security deposits	18,124			14,774
Dividends and distributions payable	17,450			16,703
Deferred revenue associated with acquired operating leases	13,906			12,707
Distributions in excess of investment in unconsolidated real estate joint venture	3,067			3,081
Other liabilities	5,135			4,727
Total liabilities	1,537,440			1,442,036
Minority interests:
Common units in the Operating Partnership	105,452			95,014
Preferred units in the Operating Partnership	8,800			8,800
Other consolidated real estate joint ventures	1,778			1,396
Total minority interests	116,030			105,210
Commitments and contingencies (Note 20)
Shareholders’ equity:
Preferred Shares of beneficial interest ($0.01 par value; shares authorized of 15,000,000, issued and outstanding of 6,775,000) (Note 14)	67			67
Common Shares of beneficial interest ($0.01 par value; 75,000,000 shares authorized, shares issued and outstanding of 42,373,505 at June 30, 2006 and 39,927,316 at December 31, 2005)	421			399
Additional paid-in capital	733,996			657,339
Cumulative distributions in excess of net income	(79,062		)	(67,697		)
Value of unearned restricted common share grants	—			(7,113		)
Accumulated other comprehensive income (loss)	226			(482		)
Total shareholders’ equity	655,648			582,513
Total liabilities and shareholders’ equity	$	2,309,118		$	2,129,759

See accompanying notes to consolidated financial statements.

Corporate Office Properties Trust and Subsidiaries
Consolidated Statements of Operations
(Dollars in thousands, except per share data)
(unaudited)

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005

Revenues
Rental revenue	$	63,308		$	52,483		$	125,534		$	103,740
Tenant recoveries and other real estate operations revenue	9,303			6,529			18,304			13,726
Construction contract revenues	12,156			17,445			26,700			33,173
Other service operations revenues	1,984			1,019			3,749			2,388
Total revenues	86,751			77,476			174,287			153,027
Expenses
Property operating expenses	22,240			17,139			43,944			35,144
Depreciation and other amortization associated with real estate operations	18,603			14,713			37,774			28,685
Construction contract expenses	11,643			17,223			25,669			32,120
Other service operations expenses	1,818			955			3,496			2,246
General and administrative expenses	3,706			3,166			7,669			6,442
Total operating expenses	58,010			53,196			118,552			104,637
Operating income	28,741			24,280			55,735			48,390
Interest expense	(17,536		)	(13,391		)	(35,017		)	(26,246		)
Amortization of deferred financing costs	(609		)	(471		)	(1,168		)	(867		)
Income from continuing operations before equity in loss of unconsolidated entities, income taxes and minority interests	10,596			10,418			19,550			21,277
Equity in loss of unconsolidated entities	(32		)	—			(55		)	—
Income tax expense	(206		)	(213		)	(421		)	(670		)
Income from continuing operations before minority interests	10,358			10,205			19,074			20,607
Minority interests in income from continuing operations
Common units in the Operating Partnership	(1,153		)	(1,256		)	(2,053		)	(2,547		)
Preferred units in the Operating Partnership	(165		)	(165		)	(330		)	(330		)
Other consolidated entities	25			15			58			39
Income from continuing operations	9,065			8,799			16,749			17,769
Income from discontinued operations, net of minority interests	26			152			2,169			203
Income before gain on sales of real estate	9,091			8,951			18,918			17,972
Gain on sales of real estate, net	25			169			135			188
Net income	9,116			9,120			19,053			18,160
Preferred share dividends	(3,653		)	(3,654		)	(7,307		)	(7,308		)
Net income available to common shareholders	$	5,463		$	5,466		$	11,746		$	10,852
Basic earnings per common share
Income from continuing operations	$	0.13		$	0.14		$	0.24		$	0.29
Discontinued operations	—			0.01			0.05			0.01
Net income	$	0.13		$	0.15		$	0.29		$	0.30
Diluted earnings per common share
Income from continuing operations	$	0.13		$	0.14		$	0.23		$	0.28
Discontinued operations	—			—			0.05			—
Net income	$	0.13		$	0.14		$	0.28		$	0.28

See accompanying notes to consolidated financial statements.

Corporate Office Properties Trust and Subsidiaries
Consolidated Statements of Cash Flows
(Dollars in thousands)
(unaudited)

	For the Six Months Ended June 30,
	2006			2005
Cash flows from operating activities
Net income	$	19,053		$	18,160
Adjustments to reconcile net income to net cash provided by operating activities:
Minority interests	2,835			2,934
Depreciation and other amortization	38,087			29,924
Amortization of deferred financing costs	1,168			867
Amortization of deferred market rental revenue	(1,050		)	(261		)
Equity in loss of unconsolidated entities	55			—
Gain on sales of real estate	(2,563		)	(234		)
Changes in operating assets and liabilities:
Increase in deferred rent receivable	(4,586		)	(3,009		)
Decrease in accounts receivable, restricted cash and prepaid and other assets	3,493			235
Increase in accounts payable, accrued expenses, rents received in advance and security deposits	1,964			9,854
Other	1,335			1,647
Net cash provided by operating activities	59,791			60,117
Cash flows from investing activities
Purchases of and additions to commercial real estate properties	(186,597		)	(174,455		)
Proceeds from sales of properties	28,209			2,545
Acquisition of minority interest in consolidated joint venture	—			(1,208		)
Investments in and advances to unconsolidated entities	(372		)	(32		)
Distributions from unconsolidated entities	254			—
Leasing costs paid	(4,232		)	(2,468		)
Other	4,434			(1,593		)
Net cash used in investing activities	(158,304		)	(177,211		)
Cash flows from financing activities
Proceeds from mortgage and other loans payable	234,748			278,455
Repayments of mortgage and other loans payable	(187,660		)	(123,154		)
Deferred financing costs paid	(756		)	(2,173		)
Acquisition of partner interests in consolidated joint ventures	(3,016		)	—
Distributions paid to partners in consolidated joint ventures	(787		)	—
Net proceeds from issuance of common shares	85,054			2,252
Dividends paid	(29,632		)	(25,933		)
Distributions paid	(5,091		)	(4,688		)
Other	617			—
Net cash provided by financing activities	93,477			124,759
Net (decrease) increase in cash and cash equivalents	(5,036		)	7,665
Cash and cash equivalents
Beginning of period	10,784			13,821
End of period	$	5,748		$	21,486

See accompanying notes to consolidated financial statements.

Corporate Office Properties Trust and Subsidiaries

Notes to Consolidated Financial Statements

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

1. Organization

Corporate Office Properties Trust (“COPT”) and subsidiaries (collectively, the “Company”) is a fully-integrated and self-managed real estate investment trust (“REIT”) that focuses on the acquisition, development, ownership, management and leasing of primarily Class A suburban office properties in the Greater Washington, D.C. region and other select submarkets. We have implemented a core customer expansion strategy that is built on meeting, through acquisitions and development, the multi-location requirements of our strategic tenants. As of June 30, 2006, our investments in real estate included the following:

· 170 wholly owned operating properties totaling 14.8 million square feet;

· 17 wholly owned properties under construction or development that we estimate will total approximately 2.1 million square feet upon completion and two wholly owned office properties totaling approximately 115,000 square feet that were under redevelopment;

· wholly owned land parcels totaling 563 acres that we believe are potentially developable into approximately 6.8 million square feet; and

· partial ownership interests in a number of other real estate projects in operations or under development or redevelopment.

We conduct almost all of our operations through our operating partnership, Corporate Office Properties, L.P. (the “Operating Partnership”), of which we are the general partner. The Operating Partnership owns real estate both directly and through subsidiary partnerships and limited liability companies (“LLCs”). A summary of our Operating Partnership’s forms of ownership and the percentage of those securities owned by COPT as of June 30, 2006 follows:

Common Units	82	%
Series E Preferred Units	100	%
Series F Preferred Units	100	%
Series G Preferred Units	100	%
Series H Preferred Units	100	%
Series I Preferred Units	0	%

Two of our trustees controlled, either directly or through ownership by other entities or family members, an additional 14% of the Operating Partnership’s common units.

In addition to owning interests in real estate, the Operating Partnership also owns 100% of Corporate Office Management, Inc. (“COMI”) and owns, either directly or through COMI, 100% of the consolidated subsidiaries that are set forth below (collectively defined as the “Service Companies”):

Entity Name		Type of Service Business
COPT Property Management Services, LLC (“CPM”)		Real Estate Management
COPT Development & Construction Services, LLC (“CDC”)		Construction and Development
Corporate Development Services, LLC (“CDS”)		Construction and Development
Corporate Cooling & Controls, LLC (“CC&C”)		Heating and Air Conditioning

Most of the services that CPM provides are for us. CDC, CDS and CC&C provide services to us and to third parties.

2. Basis of Presentation

The accompanying unaudited interim Consolidated Financial Statements have been prepared in accordance with the rules and regulations for reporting on Form 10-Q. Accordingly, certain information and disclosures

required by accounting principles generally accepted in the United States for complete Consolidated Financial Statements are not included herein. These interim financial statements should be read together with the financial statements and notes thereto included in our 2005 Annual Report on Form 10-K. The interim financial statements on the previous pages reflect all adjustments that we believe are necessary for the fair statement of our financial position and results of operations for the interim periods presented. These adjustments are of a normal recurring nature. The results of operations for such interim periods are not necessarily indicative of the results for a full year.

3. Earnings Per Share (“EPS”)

We present both basic and diluted EPS. We compute basic EPS by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the year. Our computation of diluted EPS is similar except that:

· the denominator is increased to include: (1) the weighted average number of potential additional common shares that would have been outstanding if securities that are convertible into our common shares were converted; and (2) the effect of dilutive potential common shares outstanding during the period attributable to share-based compensation using the treasury stock method; and

· the numerator is adjusted to add back any convertible preferred dividends and any other changes in income or loss that would result from the assumed conversion into common shares.

Our computation of diluted EPS does not assume conversion of securities into our common shares if conversion of those securities would increase our diluted EPS in a given period. A summary of the numerator and denominator for purposes of basic and diluted EPS calculations is set forth below (dollars and shares in thousands, except per share data):

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005
Numerator:
Income from continuing operations	$	9,065		$	8,799		$	16,749		$	17,769
Add: Gain on sales of real estate, net	25			169			135			188
Less: Preferred share dividends	(3,653		)	(3,654		)	(7,307		)	(7,308		)
Numerator for basic and diluted EPS from continuing operations available to common shareholders	5,437			5,314			9,577			10,649
Add: Income from discontinued operations, net	26			152			2,169			203
Numerator for basic and diluted EPS on net income available to common shareholders	$	5,463		$	5,466		$	11,746		$	10,852
Denominator (all weighted averages):
Denominator for basic EPS (common shares)	41,510			36,692			40,594			36,624
Dilutive effect of share-based compensation awards	1,721			1,528			1,801			1,534
Denominator for diluted EPS	43,231			38,220			42,395			38,158

Basic EPS:
Income from continuing operations	$	0.13		$	0.14		$	0.24		$	0.29
Income from discontinued operations	—			0.01			0.05			0.01
Net income available to common shareholders	$	0.13		$	0.15		$	0.29		$	0.30
Diluted EPS:
Income from continuing operations	$	0.13		$	0.14		$	0.23		$	0.28
Income from discontinued operations	—			—			0.05			—
Net income available to common shareholders	$	0.13		$	0.14		$	0.28		$	0.28

Our diluted EPS computations do not include the effects of the following securities since the conversions of such securities would increase diluted EPS for the respective periods:

	Weighted Average Shares in Denominator
	For the Three Months Ended June 30,		For the Six Months Ended June 30,
	2006	2005	2006	2005
Conversion of weighted average common units	8,465	8,676	8,493	8,681
Conversion of weighted average convertible preferred units	176	176	176	176
Share-based compensation awards	—	147	—	149

4. Recent Accounting Pronouncements

See Note 5 for disclosure associated with our implementation of recent accounting pronouncements relating to our accounting for share-based compensation.

In June 2005, the FASB ratified the consensus reached by the Emerging Issues Task Force (“EITF”) regarding EITF 04-05, “Determining Whether a General Partner, or the General Partners as a Group, Controls a Limited Partnership or Similar Entity When the Limited Partners Have Certain Rights.” The conclusion provided a framework for addressing the question of when a general partner, as defined in EITF 04-05, should consolidate a limited partnership. Under the consensus, a general partner is presumed to control a limited partnership (or similar entity) and should consolidate that entity unless the limited partners possess kick-out rights or other substantive participating rights as described in EITF 96-16, “Investor’s Accounting for an Investee When the Investor has a Majority of the Voting Interest but the Minority Shareholder or Shareholders Have Certain Approval or Veto Rights.” This EITF is effective for all new limited partnerships formed and for existing limited partnerships for which the partnership agreements are modified after June 29, 2005, and, as of January 1, 2006, for existing limited partnership agreements. The EITF did not impact us in 2005. The adoption of this EITF in 2006 for existing limited partnership agreements did not have a material effect on our financial position, results of operations or cash flows.

In June 2006, the FASB issued Interpretation No. 48, “Accounting for Uncertainty in Income Taxes — an interpretation of FASB Statement No. 109,” (“FIN 48”). FIN 48 clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements in accordance with FASB Statement No. 109, “Accounting for Income Taxes.” FIN 48 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. FIN 48 also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. FIN 48 is effective for fiscal years beginning after December 15, 2006. We do not expect that the implementation of FIN 48 will have a material effect on our financial position, results of operations or cash flows.

5. Share-Based Compensation

Share-based Compensation Plans

In 1993, we adopted a share option plan for our Trustees under which we have 75,000 common shares reserved for issuance. These options expire ten years after the date of grant and are all exercisable. Shares for this plan are issued under a registration statement on a Form S-8 that became effective upon filing with the Securities and Exchange Commission. As of June 30, 2006, there were no awards available for future grant under this plan.

In March 1998, we adopted a long-term incentive plan for our Trustees and employees. This plan provides for the award of options to acquire our common shares (“share options”), common shares subject to forfeiture restrictions (“restricted shares”) and dividend equivalents. We are authorized to issue awards under the plan amounting to no more than 13% of the total of (1) our common shares outstanding plus (2) the number of shares that would be outstanding upon redemption of all units of the Operating Partnership or other securities that are convertible into our common shares. Trustee options under this plan become exercisable beginning on the first anniversary of their grant. The vesting periods for employees’ options under this plan range from immediately to five years, although they generally, on average, are three years. Restricted shares generally vest annually in the following increments: 16% upon the first anniversary following the date of grant, 18% upon the second anniversary, 20% upon the third anniversary, 22% upon the fourth anniversary and 24% upon the fifth anniversary. Options expire ten years after the date of grant. Shares for this plan are issued under a registration statement filed on a Form

S-8 that became effective upon filing with the Securities and Exchange Commission. As of June 30, 2006, we had 906,517 awards available for future grant under this plan.

The following table summarizes share option transactions under the plans described above for the six months ended June 30, 2006:

	Shares		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2005	2,709,927		$	14.41
Granted	249,739		$	40.69
Forfeited	(27,921	)	$	31.35
Exercised	(205,110	)	$	12.95
Outstanding at June 30, 2006	2,726,635		$	16.75	6	$	69,101
Exercisable at June 30, 2006	2,029,350		$	11.51	5	$	62,038
Options expected to vest	662,421		$	32.00	9	$	6,710

The total intrinsic value of options exercised during the six months ended June 30, 2006 was $5,952.

We received $2,656 in proceeds from the exercise of share options during the six months ended June 30, 2006.

The following table summarizes restricted share transactions under the plans described above for the six months ended June 30, 2006:

	Shares		Weighted Average Grant Date Fair Value
Unvested at December 31, 2005	395,609		$	19.88
Granted	133,420		$	42.06
Forfeited	(20,822	)	$	23.67
Vested	(124,517	)	$	17.16
Unvested at June 30, 2006	383,690		$	28.28
Restricted shares expected to vest	364,506

The total fair value of restricted shares vested during the six months ended June 30, 2006 was $5,319.

We did not realize a windfall tax benefit for the 2006 periods on options exercised and restricted shares vested by employees of our subsidiaries that are subject to income tax due to the existence of a net operating loss carryforward on such subsidiaries.

Adoption of Statement of Financial Accounting Standards No. 123(R)

We have historically issued two forms of share-based compensation: share options and restricted shares. Prior to January 1, 2006, when we adopted Statement of Financial Accounting Standards No. 123(R), “Share-Based Payment” (“SFAS 123(R)”), our general method for accounting for these forms of share-based compensation was as follows:

· Share options: These awards were accounted for using the intrinsic value method. Under this method, we recorded compensation expense only when the exercise price of a grant was less than the market price of our common shares on the option grant date; when this occurred, we recognized compensation expense equal to the difference between the exercise price and the grant-date market price over the service period to which the options related.

· Restricted shares: We computed compensation expense for restricted share grants based on the value of such grants, as determined by the value of our common shares on the applicable measurement date (generally the date of grant). We recognized compensation expense for such grants over the service periods to which the grants related based on the vesting schedules for such grants.

In December 2004, the Financial Accounting Standards Board (“FASB”) issued SFAS 123(R). The statement establishes standards for the accounting for transactions in which an entity exchanges its equity instruments for goods or services, focusing primarily on accounting for transactions in which an entity obtains employee services in share-based payment transactions. The statement requires us to measure the cost of employee services received in exchange for an award of equity instruments based generally on the fair value of the award on the grant date; such cost should then be recognized over the period during which the employee is required to provide service in exchange for the award (generally the vesting period). No compensation cost is recognized for equity instruments for which employees do not render the requisite service. In 2005, the FASB also issued several FASB Staff Positions that clarify certain aspects of SFAS 123(R). SFAS 123(R) became effective for us on January 1, 2006, applying to all awards granted after January 1, 2006 and to awards modified, repurchased or cancelled after that date. We used the modified prospective application approach to adoption provided for under SFAS 123(R); under this approach, we recognized compensation cost on or after January 1, 2006 for the portion of outstanding awards for which the requisite service was not yet rendered, based on the fair value of those awards on the date of grant.

The primary effect of our adoption of SFAS 123(R) on our Consolidated Financial Statements is that beginning January 1, 2006 we are: (1) incurring higher expense associated with share options issued to employees relative to what we would have recognized under the intrinsic value method; (2) recognizing expenses associated with restricted common shares over the life of the grant using a straight line basis methodology over the service period; and (3) reporting the benefits of tax deductions in excess of recognized compensation costs as cash flow from financing activities (such benefits were previously reported as operating cash flows).

Prior to our adoption of SFAS 123(R), we provided disclosures in our financial statements for periods prior to 2006 that summarized what our operating results would have been if we had elected to account for our share-based compensation under the fair value provisions of Statement of Financial Accounting Standards No. 123, “Accounting for Stock-Based Compensation” (“SFAS 123”). In computing the amounts that appeared in these disclosures, we accounted for forfeitures as they occurred. SFAS 123(R) requires that share-based compensation be computed based on awards that are ultimately expected to vest. As a result, future forfeitures of awards are to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. SFAS 123(R) also requires that companies make a one-time cumulative effect adjustment upon adoption of the standard to record the effect that estimated future forfeitures of outstanding awards would have on expenses previously recognized in the companies’ financial statements; we did not record such a cumulative effect adjustment since we determined that the effect of pre-vesting forfeitures on our recorded expense has historically been negligible. The amounts included in our Consolidated Statements of Operations for share-based compensation in the three and six months ended June 30, 2006 reflected an estimate of pre-vesting forfeitures of approximately 5%.

In the disclosures that we provided in our financial statements for periods prior to 2006 that summarized what our operating results would have been if we had elected to account for our share-based compensation under the fair value provisions of SFAS 123, we did not capitalize costs associated with share-based compensation. Effective upon our adoption of SFAS 123(R), we began capitalizing costs associated with share-based compensation.

On November 10, 2005, the FASB issued FASB Staff Position No. FAS 123(R)-3, “Transition Election Related to Accounting for Tax Effects of Share-Based Payment Awards.” We elected to adopt the alternative transition method provided in this FASB Staff Position for calculating the tax effects of share-based compensation pursuant to SFAS 123(R). The alternative transition method includes a simplified method to establish the beginning balance of the additional paid-in capital pool (APIC pool) related to the tax effects of employee share-based compensation, which is available to absorb tax deficiencies recognized subsequent to the adoption of SFAS 123(R).

We compute the fair value of share options under SFAS 123(R) using the Black-Scholes option-pricing model; the weighted average assumptions we used in that model for share options issued during the six months ended June 30, 2006 are set forth below:

Weighted average fair value of grants on grant date	$	5.51
Risk-free interest rate	4.73		%(1)
Expected life-years	7.06
Expected volatility	23.95		%
Expected dividend yield	6.39		%

(1) Ranged from 4.35% to 5.27%.

The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected option life is based on our historical experience of employee exercise behavior. Expected volatility is based on historical volatility of our common shares. Expected dividend yield is based on the average historical dividend yield on our common shares over a period of time ending on the grant date of the options.

The table below sets forth information relating to expenses from share-based compensation included in our Consolidated Statements of Operations for the three and six months ended June 30, 2006:

	For the Three Months Ended June 30, 2006			For the Six Months Ended June 30, 2006
Increase in general and administrative expenses	$	594		$	1,063
Increase in construction contract and other service operations expenses	198			342
Share-based compensation expense	792			1,405
Income taxes	(25		)	(42		)
Minority interests	(134		)	(243		)
Net share-based compensation expense	$	633		$	1,120

Net share-based compensation expense per share
Basic	$	0.02		$	0.03
Diluted	$	0.01		$	0.03

We also capitalized share-based compensation costs of approximately $57 in the three months ended June 30, 2006 and $85 in the six months ended June 30, 2006.

As of June 30, 2006, there was $1,709 of unrecognized compensation cost related to nonvested options that is expected to be recognized over a weighted average period of approximately two years. As of June 30, 2006, there was $8,654 of unrecognized compensation cost related to nonvested restricted shares that is expected to be recognized over a weighted average period of approximately three years.

Disclosure for Periods Prior to 2006, Including Pro Forma Financial Information Under SFAS 123

Expenses from share-based compensation reflected in our Consolidated Statements of Operations for the three and six months ended June 30, 2005 were as follows:

	For the Three Months Ended June 30, 2005		For the Six Months Ended June 30, 2005
Increase in general and administrative expenses	$	510	$	923
Increase in construction contract and other service operations expenses	77		123

The following table summarizes our operating results for the three and six months ended June 30, 2005 as if we elected to account for our share-based compensation under the fair value provisions of SFAS 123 in that period:

	For the Three Months Ended June 30, 2005			For the Six Months Ended June 30, 2005
Net income, as reported	$	9,120		$	18,160
Add: Share-based compensation expense, net of related tax effects and minority interests, included in the determination of net income	448			802
Less: Share-based compensation expense determined under the fair value based method, net of related tax effects and minority interests	(429		)	(768		)
Net income, pro forma	$	9,139		$	18,194
Basic EPS on net income available to common shareholders, as reported	$	0.15		$	0.30
Basic EPS on net income available to common shareholders, pro forma	$	0.15		$	0.30
Diluted EPS on net income available to common shareholders, as reported	$	0.14		$	0.28
Diluted EPS on net income available to common shareholders, pro forma	$	0.14		$	0.29

The share-based compensation expense under the fair value method, as reported in the above table, was computed using the Black-Scholes option-pricing model.

6. Commercial Real Estate Properties

Operating properties consisted of the following:

	June 30, 2006			December 31 2005,

Land	$	335,712		$	314,719
Buildings and improvements	1,602,300			1,491,254
	1,938,012			1,805,973
Less: accumulated depreciation	(194,361		)	(174,935		)
	$	1,743,651		$	1,631,038

At June 30, 2006, we were under contract to sell 710 Route 46, an office property located in Fairfield, New Jersey that we classified as held for sale (Fairfield, New Jersey is located in the Northern/Central New Jersey region). The components associated with this property as of June 30, 2006 included the following:

	June 30, 2006
Land	$	2,154
Buildings and improvements	11,041
	13,195
Less: accumulated depreciation	(3,034		)
	$	10,161

We sold this property on July 26, 2006 for a contract price of $15,750.

Projects we had under construction or pre-construction consisted of the following:

	June 30, 2006		December 31, 2005
Land	$	158,096	$	117,434
Construction in progress	152,099		138,183
	$	310,195	$	255,617

2006 Acquisitions

We acquired the following office properties during the six months ended June 30, 2006:

Project Name	Location	Date of Acquisition	Number of Buildings	Total Rentable Square Feet	Initial Cost
North Creek	Colorado Springs, CO	5/18/2006	3	324,549	$	41,508
1915 & 1925 Aerotech Drive	Colorado Springs, CO	6/8/2006	2	75,892	8,378
7125 Columbia Gateway Drive	Columbia, MD (1)	6/29/2006	1	611,379	73,975
			6	1,011,820	$	123,861

(1) Located in the Baltimore/Washington Corridor.

The table below sets forth the allocation of the acquisition costs of the properties described above:

	North Creek			Aerotech Drive			Columbia Gateway Drive			Total
Land, operating properties	$	2,735		$	1,113		$	17,126		$	20,974
Building and improvements	34,161			6,161			46,771			87,093
Intangible assets on real estate acquisitions	5,694			1,235			11,959			18,888
Total assets	42,590			8,509			75,856			126,955
Deferred revenue associated with acquired operating leases	(1,082		)	(131		)	(1,881		)	(3,094		)
Total acquisition cost	$	41,508		$	8,378		$	73,975		$	123,861

Intangible assets recorded in connection with these acquisitions included the following:

	Cost		Weighted Average Amortization Period
Lease-up value	$	12,867	3
Tenant relationship value	3,345		6
Lease cost portion of deemed cost avoidance	1,825		3
Lease to market value	851		5
	$	18,888	4

During the six months ended June 30, 2006, we also acquired the following:

· a property located in Colorado Springs, Colorado containing a 60,000 square foot building that will be redeveloped and a four-acre parcel of land that we believe can support approximately 30,000 developable square feet for $2,602 on January 19, 2006;

· a 31-acre parcel of land located in San Antonio, Texas that we believe can support up to 375,000 developable square feet for $7,430 on January 20, 2006;

· a six-acre parcel of land located in Hanover, Maryland that we believe can support up to 60,000 developable square feet for $2,142 on February 28, 2006 (Hanover, Maryland is located in the Baltimore/Washington Corridor);

· a 20 acre parcel of land located in Colorado Springs, Colorado that we believe can support up to 300,000 developable square feet for $1,060 on April 21, 2006

· a 13 acre parcel of land located in Colorado Springs, Colorado that we believe can support up to 120,000 developable square feet for $2,254 on May 19, 2006;

· a 178 acre parcel of land located in Annapolis Junction, Maryland, located adjacent to the National Business Park, that we believe can support up to 1.25 million developable square feet for $26,854 on June 29, 2006 (Annapolis Junction, Maryland is located in the Baltimore/Washington Corridor); and

· a 5 acre parcel of land located in Columbia, Maryland that we believe can support up to 120,000 developable square feet for $3,361 on June 29, 2006.

We also acquired a 50% interest in a consolidated joint venture called Commons Office 6-B, LLC that owns a land parcel located in Hanover, Maryland for $1,830 on February 10, 2006. The joint venture is constructing an office property totaling approximately 44,000 square feet on the land parcel.

2006 Construction and Pre-Construction Activities

During 2006, we placed into service a 162,000 square foot building and 59% of a 157,000 square foot building, both of which are located in Annapolis Junction, Maryland.

As of June 30, 2006, we had construction underway on six new buildings in the Baltimore/Washington Corridor (including the one 50% joint venture discussed above), one in Northern Virginia, one in St. Mary’s County, Maryland, one in Colorado Springs, Colorado, one in Suburban Baltimore and one in Richmond, Virginia. We also had pre-construction activities underway on four new buildings located in the Baltimore/Washington Corridor (including one through a 50% joint venture the formation of which was pending at June 30, 2006), one in Suburban Maryland, one in King George County, Virginia, one in Colorado Springs Colorado and one in Suburban Baltimore. In addition, we had redevelopment underway on two wholly owned existing buildings (one is located in the Baltimore/Washington Corridor and the other in Colorado Springs, Colorado) and two buildings owned by a joint venture (one is located in Northern Virginia and the other in the Baltimore/Washington Corridor).

2006 Dispositions

During the six months ended June 30, 2006, we sold the following operating properties:

Project Name	Location	Date of Sale	Number of Buildings	Total Rentable Square Feet	Sale Price		Gain on Sale
Lakeview at the Greens	Laurel, Maryland(1)	2/6/2006	2	141,783	$	17,000	$	2,087
68 Culver Road	Dayton, New Jersey	3/8/2006	1	57,280	9,700		316
			3	199,063	$	26,700	$	2,403

(1) Laurel, Maryland is located in the Suburban Maryland region.

In addition, on January 17, 2006, we sold a newly constructed property in Columbia, Maryland for $2,530. We recognized a gain of $111 on this sale.

7. Real Estate Joint Ventures

Our investments in and advances to unconsolidated real estate joint ventures accounted for using the equity method of accounting included the following:

	Investment Balance at									Total		Maximum
	June 30, 2006			December 31, 2005			Date Acquired	Owner- ship	Nature of Activity	Assets at 6/30/2006		Exposure to Loss (1)
Route 46 Partners	$	1,509	(2)	$	1,451	(2)	3/14/2003	20%	Operates one building(3)	$	22,811	$	1,630
Harrisburg Corporate Gateway Partners, L.P.	(3,067		)(4)	(3,081		)(4)	9/29/2005	20%	Operates 16 buildings(5)	77,237		—

(1) Derived from the sum of our investment balance and maximum additional unilateral capital contributions or loans required from us. Not reported above are additional amounts that we and our partner are required to fund when needed by this joint venture; these funding requirements are proportional to our respective ownership percentages. Also not reported above are additional unilateral contributions or loans from us, the amounts of which are uncertain, that would be due if certain contingent events occurred.

(2) The carrying amount of our investment in this joint venture was lower than our share of the equity in the joint venture by $1,370 at June 30, 2006 and December 31, 2005 due to our deferral of gain on the contribution by us of real estate into the joint venture upon its formation. A difference will continue to exist to the extent the nature of our continuing involvement in the joint venture does not change.

(3) This joint venture’s property is located in Fairfield, New Jersey.

(4) The carrying amount of our investment in this joint venture was lower than our share of the equity in the joint venture by $5,218 at June 30, 2006 and $5,204 at December 31, 2005 due to our deferral of gain on the contribution by us of real estate into the joint venture upon its formation. A difference will continue to exist to the extent the nature of our continuing involvement in the joint venture does not change.

(5) This joint venture’s properties are located in Greater Harrisburg, Pennsylvania.

The following table sets forth condensed balance sheets for our unconsolidated real estate joint ventures:

	June 30, 2006		December 31, 2005
Commercial real estate property	$	94,410	$	94,552
Other assets	5,638		8,006
Total assets	$	100,048	$	102,558

Liabilities	$	81,551	$	82,619
Owners’ equity	18,497		19,939
Total liabilities and owners’ equity	$	100,048	$	102,558

The following table sets forth combined condensed statements of operations for the three and six months ended June 30, 2006 for the two unconsolidated joint ventures we owned as of June 30, 2006:

	For the Three Months Ended June 30, 2006			For the Six Months Ended June 30, 2006
Revenues	$	3,254		$	6,458
Property operating expenses	(1,082		)	(2,187		)
Interest expense	(1,189		)	(2,351		)
Depreciation and amortization expense	(993		)	(1,905		)
Net income	$	(10	)	$	15

Our joint venture partner in Route 46 Partners has preference in receiving distributions of cash flows for a defined return. Once our partner receives its defined return, we are entitled to receive distributions for a defined return. We did not recognize income from our investment in Route 46 Partners in the three and six months ended June 30, 2006 and 2005 since the income earned by the entity in those periods did not exceed our partner’s defined return.

On July 26, 2006, the property owned by Route 46 Partners was sold for a contract price of $27,000, after which the joint venture was dissolved.

Our investments in consolidated real estate joint ventures included the following:

	Date Acquired	Ownership % at 6/30/2006	Nature of Activity	Total Assets at 6/30/2006		Collateralized Assets at 6/30/2006
COPT Opportunity Invest I, LLC	12/20/2005	92.5%	Redeveloping two properties(1)	$	37,647	$	—
Commons Office 6-B, LLC	2/10/2006	50.0%	Developing land parcel(2)	6,146		6,146
MOR Forbes 2 LLC	12/24/2002	50.0%	Operating building(3)	4,250		3,839
				$	48,043	$	9,985

(1) This joint venture owns one property in Northern Virginia and one in the Baltimore/Washington Corridor.

(2) This joint venture’s property is located in Hanover, Maryland (located in the Baltimore/Washington Corridor region).

(3) This joint venture’s property is located in Lanham, Maryland (located in the Suburban Maryland region).

On January 17, 2006 we acquired our partner’s remaining 50% interest in MOR Montpelier 3 LLC, an entity that recently completed the construction of an office property, for $1,186. We then sold the property to a third party for $2,530, as discussed in Note 6.

Our commitments and contingencies pertaining to our real estate joint ventures are disclosed in Note 20.

8. Intangible Assets on Real Estate Acquisitions

Intangible assets on real estate acquisitions consisted of the following:

	June 30, 2006						December 31, 2005
	Gross Carrying		Accumulated		Net Carrying		Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Lease-up value	$	105,687	$	28,220	$	77,467	$	92,812	$	20,824	$	71,988
Lease cost portion of deemed cost avoidance	12,875		4,782		8,093		11,054		3,991		7,063
Lease to market value	10,623		6,102		4,521		9,772		5,277		4,495
Tenant relationship value	9,371		522		8,849		6,349		130		6,219
Market concentration premium	1,333		131		1,202		1,333		114		1,219
	$	139,889	$	39,757	$	100,132	$	121,320	$	30,336	$	90,984

Amortization of the intangible asset categories set forth above totaled approximately $7,608 in the six months ended June 30, 2006 and $3,914 in the six months ended June 30, 2005. The approximate weighted average amortization periods of the categories set forth above follow: lease up value: 6 years; lease cost portion of deemed cost avoidance: 4 years; lease to market value: 2 years; tenant relationship value: 5 years; and market concentration premium: 36 years. The approximate weighted average amortization period for all of the categories combined above is 5 years. Estimated amortization expense associated with the intangible asset categories set forth above for the six months ended December 31, 2006 is $9.6 million, 2007 is $16.0 million, 2008 is $13.5 million, 2009 is $11.5 million, 2010 is $8.5 million and 2011 is 6.7 million.

9. Deferred Charges

Deferred charges consisted of the following:

	June 30,			December 31,
	2006			2005
Deferred leasing costs	$	45,125		$	42,752
Deferred financing costs	22,394			21,574
Goodwill	1,853			1,853
Deferred other	155			155
	69,527			66,334
Accumulated amortization	(34,725		)	(31,288		)
Deferred charges, net	$	34,802		$	35,046

10. Accounts Receivable

Our accounts receivable are reported net of an allowance for bad debts of $452 at June 30, 2006 and $421 at December 31, 2005.

11. Prepaid and Other Assets

Prepaid and other assets consisted of the following:

	June 30,		December 31,
	2006		2005
Construction contract costs incurred in excess of billings	$	12,057	$	15,277
Prepaid expenses	1,894		7,007
Other assets	7,471		6,971
Prepaid and other assets	$	21,422	$	29,255

12. Derivatives

The following table sets forth our derivative contracts at June 30, 2006 and their respective fair values:

							Fair Value at
	Notional		One-Month		Effective	Expiration	June 30,		December 31,
Nature of Derivative	Amount		LIBOR base		Date	Date	2006		2005
Interest rate swap	$	50,000	5.0360	%	3/28/2006	3/30/2009	$	539	N/A
Interest rate swap	25,000		5.2320	%	5/1/2006	5/1/2009	147		N/A
Interest rate swap	25,000		5.2320	%	5/1/2006	5/1/2009	147		N/A
							$	833	$	—

We designated these derivatives as cash flow hedges. These contracts hedge the risk of changes in interest rates on certain of our one-month LIBOR-based variable rate borrowings until their respective maturities.

The table below sets forth our accounting application of changes in derivative fair values:

	For the Three Months Ended June 30,					For the Six Months Ended June 30,
	2006		2005			2006		2005
Increase in fair value applied to accumulated comprehensive income (loss) and minority interests	$	723	$	(4,188	)	$	833	$	(4,188	)

The activity reported in the table above for the three and six months ended June 30, 2005 represents changes in the fair value of a forward starting swap into which we entered to lock in the 10-year LIBOR swap rate in contemplation of our obtaining a long-term, fixed rate financing later in 2005. We obtained this long-term financing in October 2005 and cash settled the swap at that time for a payment to the swap party of $603.

13. Mortgages and Other Loans Payable

Mortgage and other loans payable consisted of the following:

	Maximum							Scheduled
	Principal Amount		Carrying Value at					Maturity
	Under Loans at		June 30,		December 31,		Stated Interest Rates	Dates at
	June 30, 2006		2006		2005		at June 30, 2006	June 30, 2006
Revolving Credit Facility
Wachovia Bank, N.A. Revolving Credit Facility	$	400,000	$	303,000	$	273,000	LIBOR + 1.15% to 1.55%	March 2008 (1)

Mortgage Loans
Fixed rate mortgage loans (2)	N/A		946,979		921,265		3.00% - 9.48 % (3)	2006 - 2034 (4)
Variable rate construction loan facilities	173,701		100,069		70,238		LIBOR + 1.40% to 2.20%	2006 - 2008 (5)
Other variable rate mortgage loans	N/A		82,800		82,800		LIBOR + 1.15% to 1.55% and Prime rate + 2.50%	2006 - 2010
Total mortgage loans			1,129,848		1,074,303

Note payable
Unsecured seller note	N/A		870		1,048		5.95%	May 2007 (6)
Total mortgage and other loans payable, net			$	1,433,718	$	1,348,351

(1) The Revolving Credit Facility may be extended for a one-year period, subject to certain conditions.

(2) Several of the fixed rate mortgages carry interest rates that were above or below market rates upon assumption and therefore are recorded at their fair value based on applicable effective interest rates. The carrying values of these loans reflect net premiums totaling $580 at June 30, 2006 and $1,391 at December 31, 2005.

(3) The weighted average interest rate on these loans was 6.9% at June 30, 2006.

(4) A loan with a balance of $4,928 at June 30, 2006 that matures in 2034 may be repaid in March 2014, subject to certain conditions.

(5) At June 30, 2006, $59,210 in loans scheduled to mature in 2008 may be extended for a one-year period, subject to certain conditions.

(6) This loan is callable within 90 days by the lender.

On July 3, 2006, we exercised our right to increase the borrowing capacity under our Revolving Credit Facility from $400.0 million to $500.0 million.

14. Shareholders’ Equity

Preferred Shares

Preferred shares of beneficial interest (“preferred shares”) consisted of the following:

	June 30, 2006		December 31, 2005
1,265,000 designated as Series E Cumulative Redeemable Preferred Shares of beneficial interest (1,150,000 shares issued with an aggregate liquidation preference of $28,750)	$	11	$	11
1,425,000 designated as Series F Cumulative Redeemable Preferred Shares of beneficial interest (1,425,000 shares issued with an aggregate liquidation preference of $35,625)	14		14


2,200,000 designated as Series G Cumulative Redeemable Preferred Shares of beneficial interest (2,200,000 shares issued with an aggregate liquidation preference of $55,000)	22		22
2,000,000 designated as Series H Cumulative Redeemable Preferred Shares of beneficial interest (2,000,000 shares issued with an aggregate liquidation preference of $50,000)	20		20
Total preferred shares	$	67	$	67

Common Shares

In April 2006, we sold 2.0 million common shares to an underwriter at a net price of $41.31 per share for gross proceeds before offering costs of $82,620. We contributed the net proceeds totaling $82,440 to our Operating Partnership in exchange for 2.0 million common units.

During the six months ended June 30, 2006, we converted 109,317 common units in our Operating Partnership into common shares on the basis of one common share for each common unit.

See Note 5 for disclosure of common share activity pertaining to our share-based compensation plans.

Accumulated Other Comprehensive Income (Loss)

The table below sets forth activity in the accumulated other comprehensive income (loss) component of shareholders’ equity:

	For the Six Months Ended June 30,
	2006			2005
Beginning balance	$	(482	)	$	—
Unrealized gain (loss) on derivatives, net of minority interests	683			(3,358		)
Realized loss on derivatives, net of minority interests	25			—
Ending balance	$	226		$	(3,358	)

The table below sets forth our comprehensive income:

	For the Three Months Ended June 30,					For the Six Months Ended June 30,
	2006		2005			2006		2005
Net income	$	9,116	$	9,120		$	19,053	$	18,160
Unrealized gain (loss) on derivatives, net of minority interests	593		(3,358		)	683		(3,358		)
Realized loss on derivatives, net of minority interests	13		—			25		—
Total comprehensive income	$	9,722	$	5,762		$	19,761	$	14,802

15. Dividends and Distributions

The following table summarizes our dividends and distributions when either the payable dates or record dates occurred during the six months ended June 30, 2006:

	Record Date	Payable Date	Dividend/ Distribution Per Share/Unit		Total Dividend/ Distribution
Series E Preferred Shares:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.6406	$	737
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.6406	$	737
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.6406	$	737

Series F Preferred Shares:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.6172	$	880
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.6172	$	880
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.6172	$	880

Series G Preferred Shares:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.5000	$	1,100
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.5000	$	1,100
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.5000	$	1,100

Series H Preferred Shares:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.4688	$	938
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.4688	$	938
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.4688	$	938

Common Shares:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.2800	$	11,180
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.2800	$	11,268
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.2800	$	11,859

Series I Preferred Units:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.4688	$	165
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.4688	$	165
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.4688	$	165

Common Units:
Fourth Quarter 2005	December 31, 2005	January 13, 2006	$	0.2800	$	2,387
First Quarter 2006	March 31, 2006	April 14, 2006	$	0.2800	$	2,374
Second Quarter 2006	June 30, 2006	July 14, 2006	$	0.2800	$	2,357

16. Supplemental Information to Statements of Cash Flows

	For the Six Months Ended June 30,
	2006		2005
Supplemental schedule of non-cash investing and financing activities:

Increase (decrease) in accrued capital improvements and leasing costs	$	6,557	$	(1,099	)
Amortization of discounts and premiums on mortgage loans to commercial real estate properties	$	87	$	135
Increase (decrease) in fair value of derivatives applied to AOCL and minority interests	$	833	$	(4,188	)
Issuance of common units in connection with acquisition of properties	$	7,497	$	—
Issuance of common units in the Operating Partnership in connection with contribution of properties accounted for under the financing method of accounting	$	—	$	3,687
Adjustments to minority interests resulting from changes in ownership of Operating Partnership by COPT	$	9,643	$	(1,708	)
Dividends/distribution payable	$	17,450	$	14,834
Decrease in minority interests and increase in shareholders’ equity in connection with the conversion of common units into common shares	$	4,691	$	324
Issuance of restricted shares	$	—	$	3,481
Increase in accrued furniture, fixtures and equipment	$	1,584	$	—
Mortgages assumed with acquisitions	$	37,484	$	—

17. Information by Business Segment

As of June 30, 2006, we had nine primary office property segments: Baltimore/Washington Corridor; Northern Virginia; Suburban Baltimore, Maryland; Suburban Maryland; Greater Philadelphia; St. Mary’s and King George Counties; Colorado Springs, Colorado; Northern/Central New Jersey; and San Antonio, Texas. During 2005, we also had an office property segment in Greater Harrisburg, Pennsylvania prior to the contribution of our properties in that region into a real estate joint venture in exchange for cash and a 20% interest in such joint venture on September 29, 2005.

The table below reports segment financial information. Our segment entitled “Other” includes assets and operations not specifically associated with the other defined segments, including corporate assets, investments in unconsolidated entities and elimination entries required in consolidation. We measure the performance of our segments based on total revenues less property operating expenses, a measure we define as net operating income (“NOI”). We believe that NOI is an important supplemental measure of operating performance for a REIT’s operating real estate because it provides a measure of the core operations that is unaffected by depreciation, amortization, financing and general and administrative expenses; this measure is particularly useful in our opinion in evaluating the performance of geographic segments, same-office property groupings and individual properties.

	Baltimore/ Washington Corridor		Northern Virginia		Suburban Baltimore		Colorado Springs		Suburban Maryland		Greater Philadelphia		St. Mary’s & King George Counties		Northern/ Central New Jersey		San Antonio		Greater Harrisburg		Other			Total
Three Months Ended June 30, 2006
Revenues	$	34,797	$	15,796	$	7,230	$	1,963	$	3,785	$	2,506	$	3,037	$	2,386	$	1,797	$	—	$	(219	)	$	73,078
Property operating expenses	10,134		5,804		2,932		616		1,265		40		704		823		319		—		(240		)	22,397
NOI	$	24,663	$	9,992	$	4,298	$	1,347	$	2,520	$	2,466	$	2,333	$	1,563	$	1,478	$	—	$	21		$	50,681
Commercial real estate property expenditures	$	118,873	$	3,765	$	883	$	51,770	$	830	$	277	$	659	$	534	$	906	$	—	$	(390	)	$	178,107


Three Months Ended June 30, 2005
Revenues	$	29,087	$	14,384	$	2,692	$	—	$	3,133	$	2,507	$	3,933	$	3,179	$	—	$	2,167	$	(41	)	$	61,041
Property operating expenses	8,538		4,782		968		—		1,081		37		645		1,524		—		663		(330		)	17,908
NOI	$	20,549	$	9,602	$	1,724	$	—	$	2,052	$	2,470	$	3,288	$	1,655	$	—	$	1,504	$	289		$	43,133
Commercial real estate property expenditures	$	26,286	$	11,239	$	684	$	—	$	41,449	$	209	$	1,209	$	361	$	6,356	$	52	$	34		$	87,879

Six Months Ended June 30, 2006
Revenues	$	69,190	$	31,369	$	14,587	$	3,252	$	7,338	$	5,013	$	6,025	$	5,280	$	3,608	$	—	$	(405	)	$	145,257
Property operating expenses	20,503		11,294		5,772		1,107		2,582		81		1,395		1,808		652		—		(730		)	44,464
NOI	$	48,687	$	20,075	$	8,815	$	2,145	$	4,756	$	4,932	$	4,630	$	3,472	$	2,956	$	—	$	325		$	100,793
Commercial real estate property expenditures	$	150,436	$	6,888	$	1,754	$	57,603	$	1,234	$	615	$	970	$	1,121	$	8,608	$	—	$	(658	)	$	228,571
Segment assets at June 30, 2006	$	1,047,754	$	463,782	$	186,125	$	127,196	$	114,800	$	98,644	$	98,259	$	58,030	$	51,350	$	—	$	63,178		$	2,309,118

Six Months Ended June 30, 2005
Revenues	$	58,766	$	28,803	$	5,354	$	—	$	5,587	$	5,013	$	6,811	$	7,050	$	—	$	4,411	$	(127	)	$	121,668
Property operating expenses	17,952		9,797		2,140		—		2,165		73		1,351		3,033		—		1,407		(1,092		)	36,826
NOI	$	40,814	$	19,006	$	3,214	$	—	$	3,422	$	4,940	$	5,460	$	4,017	$	—	$	3,004	$	965		$	84,842
Commercial real estate property expenditures	$	49,335	$	33,632	$	1,842	$	—	$	41,792	$	416	$	3,954	$	502	$	40,448	$	161	$	(24	)	$	172,058
Segment assets at June 30, 2005	$	809,055	$	446,370	$	60,721	$	—	$	112,637	$	100,230	$	98,520	$	83,083	$	40,448	$	66,973	$	72,411		$	1,890,448

The following table reconciles our segment revenues to total revenues as reported on our Consolidated Statements of Operations:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005
Segment revenues	$	73,078		$	61,041		$	145,257		$	121,668
Construction contract revenues	12,156			17,445			26,700			33,173
Other service operations revenues	1,984			1,019			3,749			2,388
Less: Revenues from discontinued real estate operations (Note 19)	(467		)	(2,029		)	(1,419		)	(4,202		)
Total revenues	$	86,751		$	77,476		$	174,287		$	153,027

The following table reconciles our segment property operating expenses to property operating expenses as reported on our Consolidated Statements of Operations:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005
Segment property operating expenses	$	22,397		$	17,908		$	44,464		$	36,826
Less: Property operating expenses from discontinued real estate operations (Note 19)	(157		)	(769		)	(520		)	(1,682		)
Total property operating expenses	$	22,240		$	17,139		$	43,944		$	35,144

The following table reconciles our NOI for reportable segments to income from continuing operations as reported on our Consolidated Statements of Operations:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005
NOI for reportable segments	$	50,681		$	43,133		$	100,793		$	84,842
Construction contract revenues	12,156			17,445			26,700			33,173
Other service operations revenues	1,984			1,019			3,749			2,388
Equity in loss of unconsolidated entities	(32		)	—			(55		)	—
Income tax expense	(206		)	(213		)	(421		)	(670		)
Less:
Depreciation and other amortization associated with real estate operations	(18,603		)	(14,713		)	(37,774		)	(28,685		)
Construction contract expenses	(11,643		)	(17,223		)	(25,669		)	(32,120		)
Other service operations expenses	(1,818		)	(955		)	(3,496		)	(2,246		)
General and administrative expenses	(3,706		)	(3,166		)	(7,669		)	(6,442		)
Interest expense on continuing operations	(17,536		)	(13,391		)	(35,017		)	(26,246		)
Amortization of deferred financing costs	(609		)	(471		)	(1,168		)	(867		)
Minority interests in continuing operations	(1,293		)	(1,406		)	(2,325		)	(2,838		)
NOI from discontinued operations	(310		)	(1,260		)	(899		)	(2,520		)
Income from continuing operations	$	9,065		$	8,799		$	16,749		$	17,769

The accounting policies of the segments are the same as those previously disclosed for Corporate Office Properties Trust and subsidiaries, where applicable. We did not allocate interest expense, amortization of deferred financing costs and depreciation and other amortization to segments since they are not included in the measure of segment profit reviewed by management. We also did not allocate construction contract revenues, other service operations revenues, construction contract expenses, other service operations expenses, equity in loss of unconsolidated entities, general and administrative expense, income taxes and minority interests because these items represent general corporate items not attributable to segments.

18. Income Taxes

COMI’s provision for income tax expense consisted of the following:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2006		2005		2006		2005
Deferred
Federal	$	169	$	175	$	345	$	549
State	37		38		76		121
Total	$	206	$	213	$	421	$	670

Items contributing to temporary differences that lead to deferred taxes include net operating losses that are not deductible until future periods, depreciation and amortization, certain accrued compensation and compensation paid in the form of contributions to a deferred nonqualified compensation plan.

COMI’s combined Federal and state effective tax rate was 39% for the three and six months ended June 30, 2006 and 2005.

19. Discontinued Operations

Income from discontinued operations includes revenues and expenses associated with the following:

· three properties located in the Northern/Central New Jersey region that were sold on September 8, 2005;

· the two Lakeview at the Greens properties that were sold on February 6, 2006;

· the 68 Culver Road property sold on March 8, 2006; and

· the 710 Route 46 property classified as held for sale at June 30, 2006 that was sold on July 26, 2006.

The table below sets forth the components of income from discontinued operations:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005
Revenue from real estate operations	$	467		$	2,029		$	1,419		$	4,202
Expenses from real estate operations:
Property operating expenses	157			769			520			1,682
Depreciation and amortization	147			545			313			1,239
Interest expense	100			525			334			1,028
Expenses from real estate operations	404			1,839			1,167			3,949
Income from discontinued operations before (loss) gain on sales of real estate and minority interests	63			190			252			253
(Loss) gain on sales of real estate	(32		)	—			2,403			—
Minority interests in discontinued operations	(5		)	(38		)	(486		)	(50		)
Income from discontinued operations, net of minority interests	$	26		$	152		$	2,169		$	203

Interest expense that is specifically identifiable to properties included in discontinued operations is used in the computation of interest expense attributable to discontinued operations. When properties included in the borrowing base to support lines of credit are classified as discontinued operations, we allocate a portion of such credit lines’ interest expense to discontinued operations; we compute this allocation based on the percentage that the related properties represent of all properties included in the borrowing base to support such credit lines.

20. Commitments and Contingencies

In the normal course of business, we are involved in legal actions arising from our ownership and administration of properties. Management does not anticipate that any liabilities that may result will have a materially adverse effect on our financial position, operations or liquidity. We are subject to various Federal, state and local environmental regulations related to our property ownership and operation. We have performed environmental assessments of our properties, the results of which have not revealed any environmental liability that we believe would have a materially adverse effect on our financial position, operations or liquidity.

Acquisitions

As of June 30, 2006, we were under contract to acquire a property in Washington County, Maryland for $9,000, subject to potential reductions ranging from $750 to $4,000; the amount of such decrease, if any, will be determined based on defined levels of job creation resulting from the future development of the property taking place. Upon completion of this acquisition, we will be obligated to incur $7,500 in development and construction costs for the property. We submitted a $500 deposit in connection with this acquisition.

Property Sales

As of June 30, 2006, we were under contract to sell the following properties:

· a two-acre parcel of land located in Linthicum, Maryland for $900 (Linthicum, Maryland is located in the Baltimore/Washington Corridor);

· a 19,468 square foot building located in Monroe Township, New Jersey for $3,000 (Monroe Township, New Jersey is located in the Northern/Central New Jersey region);

· a 107,348 square foot building located in Hunt Valley, Maryland for $13,795 (Hunt Valley, Maryland is located in the Suburban Baltimore region);

· a 101,263 square foot building located in Fairfield, New Jersey for $15,750 (Fairfield, New Jersey is located in the Northern/Central New Jersey region); this sale was completed on July 26, 2006; and

· a 157,394 square foot building owned by an unconsolidated real estate joint venture in which we have a 20% interest located in Fairfield, New Jersey for $27,000; this sale was completed on July 26, 2006.

Joint Ventures

As part of our obligations under the partnership agreement of Harrisburg Corporate Gateway Partners, LP, we may be required to make unilateral payments to fund rent shortfalls on behalf of a tenant that was in bankruptcy at the time the partnership was formed. Our total unilateral commitment under this guaranty is approximately $572; the tenant’s account was current as of June 30, 2006. We also agreed to indemnify the partnership’s lender for 80% of any losses under standard nonrecourse loan guarantees (environmental indemnifications and guarantees against fraud and misrepresentation) during the period of time in which we manage the partnership’s properties; we do not expect to incur any losses under these loan guarantees.

For Route 46 Partners, we were required, as of June 30, 2006, to fund leasing commissions associated with leasing space in this joint venture’s building to the extent such commissions exceeded a defined amount, although no such fundings were required prior to the joint venture’s dissolution in July 2006. In addition, we agreed to unilaterally loan the joint venture an additional $121 in the event that funds were needed by the entity.

We are party to a contribution agreement that formed a joint venture relationship with a limited partnership to develop up to 1.8 million square feet of office space on 63 acres of land located in Hanover, Maryland. Under the contribution agreement, we agreed to fund up to $2,200 in pre-construction costs associated with the property. As we and the joint venture partner agree to proceed with the construction of buildings in the future, we would make additional cash capital contributions into newly-formed entities and our joint venture partner would contribute land into such entities. We will have a 50% interest in this joint venture relationship.

We may need to make our pro rata share of additional investments in our real estate joint ventures (generally based on our percentage ownership) in the event that additional funds are needed. In the event that the other members of these joint ventures do not pay their share of investments when additional funds are needed, we may then need to make even larger investments in these joint ventures.

In two of the consolidated joint ventures that we owned as of June 30, 2006, we would be obligated to acquire the other members’ 50% interests in the joint ventures if defined events were to occur. The amounts we would need to pay for those membership interests are computed based on the amounts that the owners of the interests would receive under the joint venture agreements in the event that office properties owned by the joint ventures were sold for a capitalized fair value (as defined in the agreements) on a defined date. We estimate the aggregate amount we would need to pay for the other members’ membership interests in these joint ventures to be $1,691; however, since the determination of this amount is dependent on the operations of the office properties, which are not both completed and sufficiently occupied, this estimate is preliminary and could be materially different from the actual obligation.

Ground Lease

On March 8, 2006, we entered into a 62 year ground lease agreement on a five-acre land parcel on which we intend to construct a 24,000 square foot property. We paid $118 to the lessor upon lease execution and expect to pay an additional $399 in rent under the lease in 2006; no other rental payments are required over the life of the lease, although we are responsible for expenses associated with the property. We will recognize the total lease payments incurred under the lease evenly over the term of the lease.

On April 4, 2006, we entered into a 62-year ground lease agreement on a six-acre land parcel on which we expect to construct a 110,000 square foot property. We paid $550 to the lessor upon lease execution and expect to pay an additional $1,870 in rent under the lease by 2007. No other rental payments are

required over the life of the lease, although we are responsible for expenses associated with the property. We will recognize the total lease payments incurred under the lease evenly over the term of the lease.

Office Space Operating Leases

We are obligated as lessee under six operating leases for office space. Future minimum rental payments due under the terms of these leases as of June 30, 2006 follow:

2006	$	130
2007	200
2008	197
2009	142
2010	135
Thereafter	57
	$	861

Other Operating Leases

We are obligated under various leases for vehicles and office equipment. Future minimum rental payments due under the terms of these leases as of June 30, 2006 follow:

2006	$	223
2007	365
2008	277
2009	104
2010	6
	$	975

Environmental Indemnity Agreement

We agreed to provide certain environmental indemnifications in connection with a lease of three properties in our New Jersey region. The prior owner of the properties, a Fortune 100 company that is responsible for groundwater contamination at such properties, previously agreed to indemnify us for (1) direct losses incurred in connection with the contamination and (2) its failure to perform remediation activities required by the State of New Jersey, up to the point that the state declares the remediation to be complete. Under the lease agreement, we agreed to the following:

· to indemnify the tenant against losses covered under the prior owner’s indemnity agreement if the prior owner fails to indemnify the tenant for such losses. This indemnification is capped at $5,000 in perpetuity after the State of New Jersey declares the remediation to be complete;

· to indemnify the tenant for consequential damages (e.g., business interruption) at one of the buildings in perpetuity and another of the buildings for 15 years after the tenant’s acquisition of the property from us, if such acquisition occurs. This indemnification is capped at $12,500; and

· to pay 50% of additional costs related to construction and environmental regulatory activities incurred by the tenant as a result of the indemnified environmental condition of the properties. This indemnification is capped at $300 annually and $1,500 in the aggregate.

21. Pro Forma Financial Information (Unaudited)

We accounted for our 2005 and 2006 acquisitions using the purchase method of accounting. We included the results of operations on our acquisitions in our Consolidated Statements of Operations from their respective purchase dates through June 30, 2006.

We prepared our pro forma condensed consolidated financial information presented below for 2005 as if our acquisition of the Hunt Valley/Rutherford portfolios on December 22, 2005 had occurred at the

beginning of that period. The pro forma financial information is unaudited and is not necessarily indicative of the results that actually would have occurred if this acquisition had occurred at the beginning of the period, nor does it purport to indicate our results of operations for future periods.

	For the Six Months Ended June 30, 2005
Pro forma total revenues	$	162,338
Pro forma net income	$	17,025
Pro forma net income available to common shareholders	$	9,717
Pro forma earnings per common share on net income available to common shareholders
Basic	$	0.27
Diluted	$	0.25

22. Subsequent Events

As mentioned above, on July 3, 2006, we exercised our right to increase the borrowing capacity under our Revolving Credit Facility from $400.0 million to $500.0 million.

On July 15, 2006, we redeemed all of the outstanding 10.25% Series E Cumulative Redeemable Preferred Shares of beneficial interest (the “Series E Preferred Shares”) at a price of $25 per share. There were no accrued and unpaid dividends on July 15, 2006. We will recognize a $1.8 million decrease to net income available to common shareholders pertaining to the original issuance costs incurred on these shares at the time of the redemption.

On July 20, 2006, we completed the sale of 3,390,000 7.625% Series J Cumulative Redeemable Preferred Shares of beneficial interest (the “Series J Preferred Shares”) at a price of $25 per share for net proceeds of approximately $82.1 million after payment of the underwriter’s discount but before offering expenses. We contributed the net proceeds to our Operating Partnership in exchange for 3,390,000 Series J Preferred Units. The Series J Preferred Units carry terms that are substantially the same as the Series J Preferred Shares.

As mentioned above, on July 26, 2006, we completed the sale of the following investments in Fairfield, New Jersey:

· a 101,263 square foot building for $15,750; and

· a 157,394 square foot building owned by an unconsolidated real estate joint venture in which we have a 20% interest for $27,000, after which the joint venture was dissolved.

On July 31, 2006, we entered into agreements to put in place the following management changes effective on August 14, 2006:

· Roger A. Waesche, Jr., an Executive Vice President who has been our Chief Financial Officer since March 1999, will be appointed Executive Vice President and Chief Operating Officer and, at the same time, will cease to serve as our Chief Financial Officer; and

· Stephen E. Riffee, age 48, will commence service as our Executive Vice President and Chief Financial Officer.

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

Overview

We are a REIT that focuses on the acquisition, development, ownership, management and leasing of primarily Class A suburban office properties in select, demographically strong submarkets where we can achieve critical mass, operating synergies and key competitive advantages, including attracting high quality tenants and securing acquisition and development opportunities. As of June 30, 2006, our investments in real estate included the following:

· 170 wholly owned operating properties totaling 14.8 million square feet;

· wholly owned land parcels totaling 563 acres that we believe are potentially developable into approximately 6.8 million square feet; and

· partial ownership interests in a number of other real estate projects in operations or under development or redevelopment.

During the six months ended June 30, 2006, we:

· experienced increased revenues, operating expenses and operating income due primarily to the addition of properties through acquisition and construction activities since January 1, 2005;

· finished the period with occupancy for our wholly owned portfolio of properties at 93.6%;

· acquired six operating properties totaling 1.0 million square feet, a building to be redeveloped totaling 60,000 square feet and seven parcels of land that we believe can support up to 2.3 million developable square feet, for $169.6 million;

· placed into service a newly-constructed property totaling 162,000 square feet and 93,000 square feet of another newly constructed property, both properties being in the Baltimore/Washington Corridor;

· sold three operating properties and a newly constructed property for a total of $29.2 million; and

· sold 2.0 million common shares to an underwriter at a net price of $41.31 per share for gross proceeds before offering costs of $82.6 million.

In this section, we discuss our financial condition and results of operations as of and for the three and six months ended June 30, 2006. This section includes discussions on, among other things:

· our results of operations and why various components of our Consolidated Statements of Operations changed for the three and six months ended June 30, 2006 compared to the same periods in 2005;

· how we raised cash for acquisitions and other capital expenditures during the six months ended June 30, 2006;

· our cash flows;

· how we expect to generate cash for short and long-term capital needs;

· our off-balance sheet arrangements in place that are reasonably likely to affect our financial condition, results of operations and liquidity;

· our commitments and contingencies; and

· the computation of our Funds from Operations for the three and six months ended June 30, 2006 and 2005.

You should refer to our Consolidated Financial Statements as you read this section.

This section contains “forward-looking” statements, as defined in the Private Securities Litigation Reform Act of 1995, that are based on our current expectations, estimates and projections about future events and financial trends affecting the financial condition and operations of our business. Forward-looking statements can be identified by the use of words such as “may,” “will,” “should,” “expect,”

“estimate” or other comparable terminology. Forward-looking statements are inherently subject to risks and uncertainties, many of which we cannot predict with accuracy and some of which we might not even anticipate. Although we believe that the expectations, estimates and projections reflected in such forward-looking statements are based on reasonable assumptions at the time made, we can give no assurance that these expectations, estimates and projections will be achieved. Future events and actual results may differ materially from those discussed in the forward-looking statements. Important factors that may affect these expectations, estimates and projections include, but are not limited to:

· our ability to borrow on favorable terms;

· general economic and business conditions, which will, among other things, affect office property demand and rents, tenant creditworthiness, interest rates and financing availability;

· adverse changes in the real estate markets, including, among other things, increased competition with other companies;

· risks of real estate acquisition and development activities, including, among other things, risks that development projects may not be completed on schedule, that tenants may not take occupancy or pay rent or that development and operating costs may be greater than anticipated;

· risks of investing through joint venture structures, including risks that our joint venture partners may not fulfill their financial obligations as investors or may take actions that are inconsistent with our objectives;

· our ability to satisfy and operate effectively under federal income tax rules relating to real estate investment trusts and partnerships;

· governmental actions and initiatives; and

· environmental requirements.

We undertake no obligation to update or supplement forward-looking statements.

Corporate Office Properties Trust and Subsidiaries

Operating Data Variance Analysis

(Dollars for this table are in thousands, except per share data)

	For the Three Months Ended June 30,											For the Six Months Ended June 30,
	2006			2005			Variance			% Change		2006			2005			Variance			% Change
Revenues
Rental revenue	$	63,308		$	52,483		$	10,825		20.6	%	$	125,534		$	103,740		$	21,794		21.0	%
Tenant recoveries and other real estate operations revenue	9,303			6,529			2,774			42.5	%	18,304			13,726			4,578			33.4	%
Construction contract revenues	12,156			17,445			(5,289		)	(30.3	%)	26,700			33,173			(6,473		)	(19.5	%)
Other service operations revenues	1,984			1,019			965			94.7	%	3,749			2,388			1,361			57.0	%
Total revenues	86,751			77,476			9,275			12.0	%	174,287			153,027			21,260			13.9	%
Expenses
Property operating expenses	22,240			17,139			5,101			29.8	%	43,944			35,144			8,800			25.0	%
Depreciation and other amortization associated with real estate operations	18,603			14,713			3,890			26.4	%	37,774			28,685			9,089			31.7	%
Construction contract expenses	11,643			17,223			(5,580		)	(32.4	%)	25,669			32,120			(6,451		)	(20.1	%)
Other service operations expenses	1,818			955			863			90.4	%	3,496			2,246			1,250			55.7	%
General and administrative expense	3,706			3,166			540			17.1	%	7,669			6,442			1,227			19.0	%
Total operating expenses	58,010			53,196			4,814			9.0	%	118,552			104,637			13,915			13.3	%
Operating income	28,741			24,280			4,461			18.4	%	55,735			48,390			7,345			15.2	%
Interest expense and amortization of deferred financing costs	(18,145		)	(13,862		)	(4,283		)	30.9	%	(36,185		)	(27,113		)	(9,072		)	33.5	%
Equity in loss of unconsolidated entities	(32		)	—			(32		)	N/A		(55		)	—			(55		)	N/A
Income tax expense	(206		)	(213		)	7			(3.3	%)	(421		)	(670		)	249			(37.2	%)
Income from continuing operations before minority interests	10,358			10,205			153			1.5	%	19,074			20,607			(1,533		)	(7.4	%)
Minority interests in income from continuing operations	(1,293		)	(1,406		)	113			(8.0	%)	(2,325		)	(2,838		)	513			(18.1	%)
Income from discontinued operations, net	26			152			(126		)	(82.9	%)	2,169			203			1,966			968.5	%
Gain on sales of real estate, net	25			169			(144		)	(85.2	%)	135			188			(53		)	(28.2	%)
Net income	9,116			9,120			(4		)	0.0	%	19,053			18,160			893			4.9	%
Preferred share dividends	(3,653		)	(3,654		)	1			0.0	%	(7,307		)	(7,308		)	1			0.0	%
Net income available to common shareholders	$	5,463		$	5,466		$	(3	)	(0.1	%)	$	11,746		$	10,852		$	894		8.2	%
Basic earnings per common share
Income from continuing operations	$	0.13		$	0.14		$	(0.01	)	(7.1	%)	$	0.24		$	0.29		$	(0.05	)	(17.2	%)
Net income	$	0.13		$	0.15		$	(0.02	)	(13.3	%)	$	0.29		$	0.30		$	(0.01	)	(3.3	%)
Diluted earnings per common share
Income from continuing operations	$	0.13		$	0.14		$	(0.01	)	(7.1	%)	$	0.23		$	0.28		$	(0.05	)	(17.9	%)
Net income	$	0.13		$	0.14		$	(0.01	)	(7.1	%)	$	0.28		$	0.28		$	—		0.0	%

Results of Operations

While reviewing this section, you should refer to the “Operating Data Variance Analysis” table set forth on the preceding page, as it reflects the computation of the variances described in this section.

Occupancy and Leasing

The table below sets forth leasing information pertaining to our portfolio of wholly owned operating properties:

	June 30,			December 31,
	2006			2005
Occupancy rates
Total	93.6		%	94.0		%
Baltimore/Washington Corridor	95.5		%	96.2		%
Northern Virginia	94.1		%	96.4		%
Suburban Baltimore	85.2		%	84.7		%
Suburban Maryland	82.0		%	79.8		%
St. Mary’s and King George Counties	96.7		%	95.4		%
Greater Philadelphia	100.0		%	100.0		%
Northern/Central New Jersey	94.9		%	96.4		%
Colorado Springs, Colorado	87.4		%	85.8		%
San Antonio, Texas	100.0		%	100.0		%

Average contractual annual rental rate per square foot at period end (1)	$	20.44		$	20.28

(1) Includes estimated expense reimbursements.

We renewed 64.0% of the square footage under leases scheduled to expire in the six months ended June 30, 2006 (including the effect of early renewals and excluding the effect of early lease terminations).

The table below sets forth occupancy information pertaining to properties in which we have a partial ownership interest:

			Occupancy Rates at
Geographic Region	Ownership Interest		June 30, 2006		December 31, 2005

Suburban Maryland	50.0	%	47.9	%	47.9	%
Northern Virginia	92.5	%	100.0	%(1)	100.0	%(1)
Greater Harrisburg	20.0	%	89.9	%	89.4	%
Northern/Central New Jersey	20.0	%	86.9	%	80.9	%

(1) Excludes the effect of 62,000 unoccupied square feet undergoing redevelopment at period end.

Revenues from real estate operations and property operating expenses

We typically view our changes in revenues from real estate operations and property operating expenses as being comprised of three main components:

· Changes attributable to the operations of properties owned and 100% operational throughout the two periods being compared. We define these as changes from “Same-Office Properties.” For example, when comparing the second quarters of 2005 and 2006, Same-Office Properties would be properties owned and 100% operational from April 1, 2005 through June 30, 2006.

· Changes attributable to operating properties acquired during the two periods being compared and newly-constructed properties that were placed into service and not 100% operational throughout the two periods being compared. We define these as changes from “Property Additions.”

· Changes attributable to properties sold during the two periods being compared that are not reported as discontinued operations. We define these as changes from “Sold Properties.”

The tables below set forth the components of our changes in revenues from real estate operations and property operating expenses (dollars in thousands):

	Changes From the Three Months Ended June 30, 2005 to 2006
	Property							Sold
	Additions		Same-Office Properties					Properties			Other			Total
	Dollar		Dollar			Percentage		Dollar			Dollar			Dollar
	Change (1)		Change			Change		Change (2)			Change (3)			Change
Revenues from real estate operations
Rental revenue	$	12,746	$	352		0.7	%	$	(1,849	)	$	(424	)	$	10,825
Tenant recoveries and other real estate operations revenue	1,784		1,197			20.1	%	(317		)	110			2,774
Total	$	14,530	$	1,549		2.8	%	$	(2,166	)	$	(314	)	$	13,599

Property operating expenses	$	4,184	$	1,680		10.3	%	$	(654	)	$	(109	)	$	5,101

Straight-line rental revenue adjustments included in rental revenue	$	1,460	$	(500	)	N/A		$	(22	)	$	(208	)	$	730
Amortization of deferred market rental revenue	$	364	$	(60	)	N/A		$	—		$	—		$	304
Number of operating properties included in component category	50		120			N/A		16			1			187

(1) Includes 44 acquired properties and six newly-constructed properties.

(2) Includes sold properties that are not reported as discontinued operations.

(3) Includes, among other things, the effects of amounts eliminated in consolidation. Certain amounts eliminated in consolidation are attributable to the Property Additions and Same-Office Properties.

	Changes From the Six Months Ended June 30, 2005 to 2006
	Property Additions		Same-Office Properties					Sold Properties			Other			Total
	Dollar Change (1)		Dollar Change			Percentage Change		Dollar Change (2)			Dollar Change (3)			Dollar Change
Revenues from real estate operations
Rental revenue	$	24,853	$	1,593		1.6	%	$	(3,734	)	$	(918	)	$	21,794
Tenant recoveries and other real estate operations revenue	3,010		1,924			15.8	%	(682		)	326			$	4,578
Total	$	27,863	$	3,517		3.1	%	$	(4,416	)	$	(592	)	$	26,372

Property operating expenses	$	8,030	$	2,108		6.2	%	$	(1,461	)	$	123		$	8,800

Straight-line rental revenue adjustments included in rental revenue	$	2,568	$	(1,095	)	N/A		$	(49	)	$	(413	)	$	1,011
Amortization of deferred market rental revenue	$	803	$	13		N/A		$	—		$	(27	)	$	789
Number of operating properties included in component category	50		120			N/A		16			1			187

(1) Includes 44 acquired properties and six newly-constructed properties.

(2) Includes sold properties that are not reported as discontinued operations.

As the tables above indicate, our total increase in revenues from real estate operations and property operating expenses was attributable primarily to the Property Additions.

For the three month periods, the increase in revenues from real estate operations for the Same-Office Properties included the following:

· an increase of $953,000, or 2.0%, in rental revenue from the Same-Office Properties attributable primarily to changes in occupancy and rental rates between the two periods; and

· a decrease of $600,000, or 43.5%, in net revenue from the early termination of leases, which included $1.1 million attributable to one lease termination transaction that occurred during the three months ended June 30, 2005, partially offset by $612,000 in additional revenue attributable to two lease terminations that affected the three months ended June 30, 2006. To explain further the concept of net revenue from the early termination of leases, when tenants terminate their lease obligations prior to the end of the agreed lease terms, they typically pay fees to break these obligations. We recognize such fees as revenue and write off against such revenue any (1) deferred rents receivable and (2) deferred revenue and deferred assets that are amortizable into rental revenue associated with the leases; the resulting net amount is the net revenue from the early termination of the leases.

For the six month periods, the increase in revenues from real estate operations for the Same-Office Properties included the following:

· an increase of $2.5 million, or 2.6%, in rental revenue from the Same-Office Properties attributable primarily to changes in occupancy and rental rates between the two periods; and

· a decrease of $922,000, or 41.9%, in net revenue from the early termination of leases, which included $1.1 million attributable to one lease termination transaction that occurred during the six months ended June 30, 2005.

For the three and six month periods, the increases in tenant recoveries and other real estate operations revenue from the Same-Office Properties is attributable primarily to higher tenant billings resulting from our projections for increased property operating expenses in 2006 compared to 2005.

The increase in operating expenses for the Same-Office Properties for the three month periods included the following:

· an increase of $771,000, or 25.6%, in real estate taxes reflecting primarily an increase in the assessed value of many of our properties;

· an increase of $433,000, or 13.3%, in utilities due to (1) rate increases and (2) changes in occupancy and lease structures; and

· an increase of $267,000, or 15.0%, in repairs and maintenance labor due in large part to higher labor hour rates resulting from an increase in the underlying costs for labor.

The increase in operating expenses for the Same-Office Properties for the six month periods included the following:

· an increase of $917,000, or 14.9%, in real estate taxes reflecting an increase in the assessed value of many of our properties;

· an increase of $743,000, or 10.6%, in utilities due to (1) rate increases and (2) changes in occupancy and lease structures;

· an increase of $602,000, or 16.8%, in repairs and maintenance labor due in large part to higher labor hour rates resulting from an increase in the underlying costs for labor;

· an increase of $320,000, or 7.2%, in cleaning expenses due primarily to our assumption of responsibility for payment of such costs at certain properties due to changes in occupancy and lease structures; and

· a decrease of $1.1 million, or 59.7%, due to decreased snow removal expenses.

Construction contract and other service revenues and expenses

The table below sets forth changes in our construction contract and other service revenues and expenses (dollars in thousands):

	Changes Between the Three Month Periods Ended June 30, 2006 and 2005								Changes Between the Six Month Periods Ended June 30, 2006 and 2005
	Construction Contract Dollar Change			Other Service Operations Dollar Change		Total Dollar Change			Construction Contract Dollar Change			Other Service Operations Dollar Change		Total Dollar Change
Service operations
Revenues	$	(5,289	)	$	965	$	(4,324	)	$	(6,473	)	$	1,361	$	(5,112	)
Expenses	(5,580		)	863		(4,717		)	(6,451		)	1,250		(5,201		)
Income from service operations	$	291		$	102	393			$	(22	)	$	111	$	89

The gross revenues and costs associated with these services generally bear little relationship to the level of activity from these operations since a substantial portion of the costs are subcontracted costs that are reimbursed to us by the customer at no mark up. As a result, the operating margins from these operations are small relative to the revenue. We use the net of service operations revenues and expenses to evaluate performance.

Depreciation and amortization

For the three and six month periods, the increases in our depreciation and other amortization associated with real estate operations included in continuing operations was attributable primarily to the Property Additions.

General and administrative expenses

For the three month periods, the increase in general and administrative expenses of $540,000, or 17.1%, included an increase of $586,000, or 22.0%, in compensation expense. The increase in general and administrative expenses of $1.2 million, or 19.0%, for the six month periods included an increase of $1.3 million, or 23.4%, in compensation expense. These increases in compensation expenses are due primarily to additional employee positions to support our growth and increased salaries and bonuses for existing employees.

Interest expense and amortization of deferred financing costs

Our interest expense and amortization of deferred financing costs increased $4.3 million, or 30.9%, between the three month periods which includes the effects of a 14.7% increase in our average outstanding debt balance, resulting primarily from our 2005 and 2006 acquisition and construction activities, and an increase in our weighted average interest rates from 5.7% to 6.4%.

Our interest expense and amortization of deferred financing costs increased $9.1 million, or 33.5%, between the six month periods which includes the effects of a 22.0% increase in our average outstanding debt balance, resulting primarily from our 2005 and 2006 acquisition and construction activities, and an increase in our weighted average interest rates from 5.7% to 6.2%.

Minority interests

Interests in our Operating Partnership are in the form of preferred and common units. The line entitled “minority interests in income from continuing operations” on our Consolidated Statements of Operations includes primarily the allocation of income before minority interests to preferred and common units not owned by us; for the amount of this line attributable to preferred units versus common units, you should refer to our Consolidated Statements of Operations. Income is allocated to minority interest preferred unitholders in an amount equal to the priority return from the Operating Partnership to which they are entitled. Income is allocated to minority interest common unitholders based on the income earned by the Operating Partnership after allocation to preferred unitholders multiplied by the percentage of the common units in the Operating Partnership owned by those common unitholders.

As of June 30, 2006, we owned 95% of the outstanding preferred units and approximately 82% of the outstanding common units. Changes in the percentage of the Operating Partnership owned by minority interests from the six months ended June 30, 2005 to the six months ended June 30, 2006 included the following:

· the issuance of additional units to us as we issued new common shares since January 1, 2005 due to the fact that we receive common units in the Operating Partnership each time we issue common shares;

· the exchange of common units for our common shares by certain minority interest holders of common units; and

· our issuance of common units to third parties in connection with acquisitions during 2005 and 2006.

The decrease in income allocated to minority interest holders of common units included in income from continuing operations was attributable primarily to the following:

· a decrease in the Operating Partnership’s income from continuing operations before minority interests due in large part to the changes described above; and

· a decrease attributable to our increasing ownership of common units (from 80% at December 31, 2004 to 82% at June 30, 2006).

Income from discontinued operations, net of minority interests

For the six month periods, our income from discontinued operations increased due primarily to the sale of three properties in the current period from which we recognized a gain of $2.4 million before allocation to minority interests.

Liquidity and Capital Resources

Cash and cash equivalents

Our cash and cash equivalents balance totaled $5.7 million as of June 30, 2006, a 46.7% decrease from the balance at December 31, 2005. The cash and cash equivalents balances that we carry as of a point in time can vary significantly due in part to the inherent variability of the cash needs of our acquisition and development activities. We maintain sufficient cash and cash equivalents to meet our operating cash requirements and short term investing and financing cash requirements. When we determine that the amount of cash and cash equivalents on hand is more than we need to meet such requirements, we may pay down our Revolving Credit Facility or forgo borrowing under construction loan credit facilities to fund development activities.

Operating Activities

We generated most of our cash from the operations of our properties. Most of the amount by which our revenues from real estate operations exceeded property operating expenses was cash flow; we applied most of this cash flow towards interest expense, scheduled principal amortization on mortgage loans, dividends to our shareholders, distributions to minority interest holders of preferred and common units in the Operating Partnership, capital improvements and leasing costs for our operating properties and general and administrative expenses.

Our cash flow from operations determined in accordance with GAAP decreased $326,000, or 0.5%, when comparing the six months ended June 30, 2006 and 2005. We expect to continue to use cash flow provided by operations to meet our short-term capital needs, including all property operating expenses, general and administrative expenses, interest expense, scheduled principal amortization of mortgage loans, dividends and distributions and capital improvements and leasing costs. We do not anticipate borrowing to meet these requirements.

Investing and Financing Activities During the Six Months Ended June 30, 2006

We acquired six operating properties totaling 1.0 million square feet, a building to be redeveloped totaling 60,000 square feet and seven parcels of land that we believe can support up to 2.3 million developable square feet, for $169.6 million. These acquisitions were financed using the following:

· $93.4 million in borrowings under our Revolving Credit Facility;

· $37.5 million (accounting value) from an assumed mortgage loan;

· $7.5 million (accounting value) from the issuance of common units in the Operating Partnership;

· $2.4 million using an escrow funded by proceeds from one of our property sales discussed below; and

· cash reserves for the balance.

We also acquired a 50% interest in a joint venture owning a land parcel for $1.8 million using cash reserves. The joint venture is constructing an office property totaling approximately 44,000 square feet on the land parcel.

On March 8, 2006, we entered into a 62-year ground lease agreement on a five-acre land parcel on which we intend to construct a 24,000 square foot property. We paid $118,000 to the lessor upon lease execution and expect to pay an additional $399,000 in rent under the lease in 2006; no other rental

payments are required over the life of the lease, although we are responsible for expenses associated with the property.

On April 4, 2006, we entered into a 62-year ground lease agreement on a six-acre land parcel on which we expect to construct a 110,000 square foot property. We paid $550,000 to the lessor upon lease execution and expect to pay an additional $1.9 million in rent under the lease by 2007. No other rental payments are required over the life of the lease, although we are responsible for expenses associated with the property.

During 2006, we placed into service a 162,000 square foot property in the Baltimore/Washington Corridor that was 100% leased at June 30, 2006. Costs incurred on this property through June 30, 2006 totaled $28.7 million, $5.1 million of which was incurred in the six months ended June 30, 2006.

At June 30, 2006, we had construction activities underway on 11 properties totaling 1.3 million square feet that were 64.3% pre-leased, including square feet placed into service of 14,000 in one property and 93,000 in another property; we owned 100% of ten of these properties and 50% of one of these properties. Costs incurred on these properties through June 30, 2006 totaled approximately $145.5 million, of which approximately $40.3 million was incurred during the six months ended June 30, 2006. We have construction loan facilities in place totaling $149.7 million to finance the construction of seven of these properties; borrowings under these facilities totaled $77.1 million at June 30, 2006, $29.9 million of which was borrowed during the six months ended June 30, 2006. The remaining costs incurred during the six months ended June 30, 2006 were funded using primarily borrowings from our Revolving Credit Facility and cash reserves.

The table below sets forth the major components of our additions to the line entitled “Total Commercial Real Estate Properties” on our Consolidated Balance Sheet for 2006 (in thousands):

Acquisitions	$158,034
Construction and development	55,354
Capital improvements on operating properties	9,109
Tenant improvements on operating properties	6,074	(1)
	$228,571

(1) Tenant improvement costs incurred on newly-constructed properties are classified in this table as construction and development.

On January 17, 2006 we acquired the remaining 50% of a joint venture that recently completed the construction of an office property for $1.2 million.

During the six months ended June 30, 2006, we sold three previously operational properties totaling 199,000 square feet and one recently constructed property for a total of $29.2 million. The net proceeds from these sales after transaction costs totaled $28.2 million. We used $2.4 million of these proceeds to fund an escrow subsequently applied towards an acquisition and most of the balance to pay down our Revolving Credit Facility.

During the six months ended June 30, 2006, we borrowed $29.9 million from construction loans to finance construction activities.

During the six months ended June 30, 2006, we entered into three interest rate swaps to hedge the risk of changes in interest rates on certain of our one-month LIBOR-based variable rate borrowings until their respective maturities, information for which is set forth below (dollars in thousands):

Notional	One-Month	Effective	Expiration
Amount	LIBOR base	Date	Date
$50,000	5.0360%	3/28/2006	3/30/2009
25,000	5.2320%	5/1/2006	5/1/2009
25,000	5.2320%	5/1/2006	5/1/2009

In April 2006, we sold 2.0 million common shares to an underwriter at a net price of $41.31 per share for gross proceeds before offering costs of $82.6 million. We contributed the net proceeds totaling $82.4 million to our Operating Partnership in exchange for 2.0 million common units. The proceeds were used primarily to pay down our Revolving Credit Facility.

Certain of our mortgage loans require that we comply with a number of restrictive financial covenants, including leverage ratio, minimum net worth, minimum fixed charge coverage, minimum debt service and maximum secured indebtedness. As of June 30, 2006, we were in compliance with these financial covenants.

Analysis of Cash Flow Associated with Investing and Financing Activities

Our net cash flow used in investing activities decreased $18.9 million, or 10.7% when comparing the six months ended June 30, 2006 and 2005. This decrease was due primarily to the following:

· a $25.7 million increase in proceeds from sales of properties. We generally do not acquire properties with the intent of selling them. We generally attempt to sell a property when we believe that most of the earnings growth potential in that property has been realized, or determine that the property no longer fits within our strategic plans due to its type and/or location. While we expect to reduce or eliminate our real estate investments in certain of our non-core markets in the future, we cannot predict when and if these dispositions will occur. Since our real estate sales activity is driven by transactions unrelated to our core operations, our proceeds from sales of properties are subject to significant fluctuation from period to period and, therefore, we do not believe that the change described above is necessarily indicative of a trend; offset by

· a $12.1 million, or 7.0%, increase in purchases of and additions to commercial real estate. This increase is due primarily to an increase in property acquisitions. Our ability to locate and complete acquisitions is dependent on numerous variables and, as a result, is inherently subject to significant fluctuation from period to period.

Our cash flow provided by financing activities decreased $31.3 million, or 25.1%, when comparing the six months ended June 30, 2006 and 2005. This decrease included the following:

· a $64.5 million, or 52.4%, increase in repayments of mortgage and other loans payable. This increase is attributable primarily to our use of proceeds from the sale of 2.0 million common shares in April 2006 and the sales of properties to pay down our Revolving Credit Facility;

· a $43.7 million, or 15.7%, decrease in proceeds from mortgage and other loans payable. This decrease is due in part to the availability of cash proceeds from common share issuances, as described below, and increased property sales; and

· $82.8 million increase in proceeds from common share issuances completed during the two periods being compared, due primarily to the sale of 2.0 million common shares in April 2006 discussed above.

Off-Balance Sheet Arrangements

We had no significant changes in our off-balance sheet arrangements from those described in the section entitled “Off-Balance Sheet Arrangements” in our 2005 Annual Report on Form 10-K.

Investing and Financing Activities Subsequent to June 30, 2006

On July 3, 2006, we exercised our right to increase the borrowing capacity under our Revolving Credit Facility from $400.0 million to $500.0 million.

On July 15, 2006, we redeemed all of the outstanding 10.25% Series E Preferred Shares at a price of $25 per share. There were no accrued and unpaid dividends on July 15, 2006. We will recognize a $1.8 million decrease to net income available to common shareholders pertaining to the original issuance costs incurred on these shares at the time of the redemption.

On July 20, 2006, we completed the sale of 3,390,000 7.625% Series J Preferred Shares at a price of $25 per share for net proceeds of approximately $82.1 million after payment of the underwriter’s discount but before offering expenses. We contributed the net proceeds to our Operating Partnership in exchange for 3,390,000 Series J Preferred Units. The Series J Preferred Units carry terms that are substantially the same as the Series J Preferred Shares. The proceeds were used primarily to pay down our Revolving Credit Facility.

On July 26, 2006, we completed the sale of the following investments in Fairfield, New Jersey:

· a 101,263 square foot building for $15.8 million. Net proceeds from the transaction after repayment of a $4.8 million mortgage loan on the property and other transactions costs totaled approximately $10.4 million; and

· a 157,394 square foot building, which was owned by an unconsolidated real estate joint venture in which we had a 20% interest, for $27.0 million. Net proceeds to us from the transaction after repayment of a $13.6 million mortgage loan on the property, other transaction costs and allocations to our joint venture partner totaled approximately $2.3 million.

The net proceeds to us from these sales were used primarily to pay down our Revolving Credit Facility.

Other Future Cash Requirements for Investing and Financing Activities

As of June 30, 2006, we were under contract to acquire a property in Washington County, Maryland for $9.0 million, subject to potential reductions ranging from $750,000 to $4.0 million; the amount of such decrease, if any, will be determined based on defined levels of job creation resulting from the future development of the property taking place. Upon completion of this acquisition, we will be obligated to incur $7.5 million in development and construction costs for the property. We submitted a $500,000 deposit in connection with this acquisition. We expect to fund this acquisition using proceeds from our Revolving Credit Facility.

As previously discussed, as of June 30, 2006, we had construction activities underway on 11 properties totaling 1.3 million square feet that were 64.3% pre-leased. We estimate remaining costs to be incurred will total approximately $117.6 million upon completion of these properties; we expect to incur these costs through June 2008. We have $72.6 million remaining to be borrowed under construction loan facilities totaling $149.7 million for seven of these properties. We expect to fund the remaining portion of these costs using primarily borrowings from new construction loan facilities.

As of June 30, 2006, we had pre-construction activities underway on eight new office properties estimated to total 976,750 square feet, one of which is through a joint venture. We estimate that costs for these properties will total approximately $196.8 million. As of June 30, 2006, costs incurred on these properties totaled $14.8 million and the balance is expected to be incurred from 2006 through 2008. We expect to fund most of these costs using borrowings from new construction loan facilities, although we expect our joint venture partner will fund a portion of the costs associated with the one joint venture property.

As of June 30, 2006, we had redevelopment activities underway on four properties totaling 726,527 square feet. Two of these properties are owned by a joint venture in which we own a 92.5% interest. We

estimate that remaining costs of the redevelopment activities will total approximately $47.3 million. We expect to fund most of these costs using borrowings under new construction loan facilities.

During the remainder of 2006 and beyond, we expect to complete other acquisitions of properties and commence construction and pre-construction activities in addition to the ones previously described. We expect to finance these activities as we have in the past, using mostly a combination of borrowings from new loans, borrowings under our Revolving Credit Facility, proceeds from sales of existing properties and additional equity issuances of common and/or preferred shares.

At August 4, 2006, our Revolving Credit Facility had a maximum principal amount of $500.0 million, with a right to further increase the maximum principal amount in the future to $600.0 million, subject to certain conditions. Based on the value of assets identified by us to support repayment of the Revolving Credit Facility, $500.0 million was available as of August 4, 2006, $165.0 million of which was unused.

As of June 30, 2006, we were under contract to sell the following properties:

· a two-acre parcel of land located in Linthicum, Maryland for $900,000;

· a 19,468 square foot building located in Monroe Township, New Jersey for $3.0 million;

· a 107,348 square foot building located in Hunt Valley, Maryland for $13.8 million;

· a 101,263 square foot building located in Fairfield, New Jersey for $15.8 million; as discussed above, this sale was completed on July 26, 2006; and

· a 157,394 square foot building owned by an unconsolidated real estate joint venture in which we have a 20% interest located in Fairfield, New Jersey; as discussed above, this sale was also completed on July 26, 2006.

We expect to redeem the outstanding 9.875% Series F Preferred Shares of beneficial interest in 2006 at a price of $25 per share, or $35.6 million. At the time we complete this redemption, we would recognize a decrease to net income available to common shareholders of approximately $2.1 million pertaining to the original issuance costs incurred on these shares.

Management Changes

On July 31, 2006, we entered into agreements to put in place the following management changes effective on August 14, 2006:

· Stephen E. Riffee, age 48, will commence service as our Executive Vice President and Chief Financial Officer.

Funds From Operations

Funds from operations (“FFO”) is defined as net income computed using GAAP, excluding gains (or losses) from sales of real estate, plus real estate-related depreciation and amortization and after adjustments for unconsolidated partnerships and joint ventures. Gains from sales of newly-developed properties less accumulated depreciation, if any, required under GAAP are included in FFO on the basis that development services are the primary revenue generating activity; we believe that inclusion of these development gains is in accordance with the National Association of Real Estate Investment Trusts (“NAREIT”) definition of FFO, although others may interpret the definition differently.

Accounting for real estate assets using historical cost accounting under GAAP assumes that the value of real estate assets diminishes predictably over time. NAREIT stated in its April 2002 White Paper on Funds from Operations that “since real estate asset values have historically risen or fallen with market conditions, many industry investors have considered presentations of operating results for real estate

companies that use historical cost accounting to be insufficient by themselves.” As a result, the concept of FFO was created by NAREIT for the REIT industry to “address this problem.” We agree with the concept of FFO and believe that FFO is useful to management and investors as a supplemental measure of operating performance because, by excluding gains and losses related to sales of previously depreciated operating real estate properties and excluding real estate-related depreciation and amortization, FFO can help one compare our operating performance between periods. In addition, since most equity REITs provide FFO information to the investment community, we believe that FFO is useful to investors as a supplemental measure for comparing our results to those of other equity REITs. We believe that net income is the most directly comparable GAAP measure to FFO.

Since FFO excludes certain items includable in net income, reliance on the measure has limitations; management compensates for these limitations by using the measure simply as a supplemental measure that is weighed in the balance with other GAAP and non-GAAP measures. FFO is not necessarily an indication of our cash flow available to fund cash needs. Additionally, it should not be used as an alternative to net income when evaluating our financial performance or to cash flow from operating, investing and financing activities when evaluating our liquidity or ability to make cash distributions or pay debt service. The FFO we present may not be comparable to the FFO presented by other REITs since they may interpret the current NAREIT definition of FFO differently or they may not use the current NAREIT definition of FFO.

Basic funds from operations (“Basic FFO”) is FFO adjusted to (1) subtract preferred share dividends and (2) add back GAAP net income allocated to common units in the Operating Partnership not owned by us. With these adjustments, Basic FFO represents FFO available to common shareholders and common unitholders. Common units in the Operating Partnership are substantially similar to our common shares and are exchangeable into common shares, subject to certain conditions. We believe that Basic FFO is useful to investors due to the close correlation of common units to common shares. We believe that net income is the most directly comparable GAAP measure to Basic FFO. Basic FFO has essentially the same limitations as FFO; management compensates for these limitations in essentially the same manner as described above for FFO.

Diluted funds from operations (“Diluted FFO”) is Basic FFO adjusted to add back any convertible preferred share dividends and any other changes in Basic FFO that would result from the assumed conversion of securities that are convertible or exchangeable into common shares. However, the computation of Diluted FFO does not assume conversion of securities that are convertible into common shares if the conversion of those securities would increase Diluted FFO per share in a given period. We believe that Diluted FFO is useful to investors because it is the numerator used to compute Diluted FFO per share, discussed below. In addition, since most equity REITs provide Diluted FFO information to the investment community, we believe Diluted FFO is a useful supplemental measure for comparing us to other equity REITs. We believe that the numerator for diluted EPS is the most directly comparable GAAP measure to Diluted FFO. Since Diluted FFO excludes certain items includable in the numerator to diluted EPS, reliance on the measure has limitations; management compensates for these limitations by using the measure simply as a supplemental measure that is weighed in the balance with other GAAP and non-GAAP measures. Diluted FFO is not necessarily an indication of our cash flow available to fund cash needs. Additionally, it should not be used as an alternative to net income when evaluating our financial performance or to cash flow from operating, investing and financing activities when evaluating our liquidity or ability to make cash distributions or pay debt service. The Diluted FFO that we present may not be comparable to the Diluted FFO presented by other REITs.

Diluted funds from operations per share (“Diluted FFO per share”) is (1) Diluted FFO divided by (2) the sum of the (a) weighted average common shares outstanding during a period, (b) weighted average common units outstanding during a period, (c) weighted average number of potential additional common shares that would have been outstanding during a period if other securities that are convertible or exchangeable into common shares were converted or exchanged and (d) the effect of dilutive potential common shares outstanding during a period attributable to share-based compensation using the treasury stock method. However, the computation of Diluted FFO per share does not assume conversion of securities that are convertible into common shares if the conversion of those securities would increase Diluted FFO per share in a given period. We believe that Diluted FFO per share is useful to investors

because it provides investors with a further context for evaluating our FFO results in the same manner that investors use earnings per share (“EPS”) in evaluating net income available to common shareholders. In addition, since most equity REITs provide Diluted FFO per share information to the investment community, we believe Diluted FFO per share is a useful supplemental measure for comparing us to other equity REITs. We believe that diluted EPS is the most directly comparable GAAP measure to Diluted FFO per share. Diluted FFO per share has most of the same limitations as Diluted FFO (described above); management compensates for these limitations in essentially the same manner as described above for Diluted FFO.

Our Basic FFO, Diluted FFO and Diluted FFO per share for the three and six months ended June 30, 2006 and 2005 and reconciliations of (1) net income to FFO, (2) the numerator for diluted EPS to diluted FFO and (3) the denominator for diluted EPS to the denominator for diluted FFO per share are set forth in the following table (dollars and shares in thousands, except per share data):

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2006			2005			2006			2005

Net income	$	9,116		$	9,120		$	19,053		$	18,160
Add: Real estate-related depreciation and amortization	18,490			15,087			37,558			29,592
Add: Depreciation and amortization on unconsolidated
real estate entities	109			—			203			—
Less: Depreciation and amortization allocable to minority interests in other consolidated entities	(44		)	(30		)	(86		)	(62		)
Add (less): (Loss) gain on sales of real estate, excluding development portion(1)	6			(24		)	(2,453		)	(48		)
Funds from operations (“FFO”)	27,677			24,153			54,275			47,642
Add: Minority interests-common units in the Operating
Partnership	1,157			1,335			2,563			2,643
Less: Preferred share dividends	(3,653		)	(3,654		)	(7,307		)	(7,308		)
Funds from Operations - basic and diluted (“Basic and Diluted FFO”)	$	25,181		$	21,834		$	49,531		$	42,977
Weighted average common shares	41,510			36,692			40,594			36,624
Conversion of weighted average common units	8,465			8,676			8,493			8,681
Weighted average common shares/units - basic FFO	49,975			45,368			49,087			45,305
Dilutive effect of share-based compensation awards	1,721			1,528			1,801			1,534
Weighted average common shares/units - diluted FFO	51,696			46,896			50,888			46,839

Diluted FFO per common share	$	0.49		$	0.47		$	0.97		$	0.92

Numerator for diluted EPS	$	5,463		$	5,466		$	11,746		$	10,852
Add: Minority interests-common units in the Operating Partnership	1,157			1,335			2,563			2,643
Add: Real estate-related depreciation and amortization	18,490			15,087			37,558			29,592
Add: Depreciation and amortization on unconsolidated
real estate entities	109			—			203			—
Less: Depreciation and amortization allocable to minority interests in other consolidated entities	(44		)	(30		)	(86		)	(62		)
Add (less): (Loss) gain on sales of real estate, excluding development portion(1)	6			(24		)	(2,453		)	(48		)
Diluted FFO	$	25,181		$	21,834		$	49,531		$	42,977
Denominator for diluted EPS	43,231			38,220			42,395			38,158
Weighted average common units	8,465			8,676			8,493			8,681
Denominator for Diluted FFO per share	51,696			46,896			50,888			46,839

(1) Gains from the sale of real estate that are attributable to sales of non-operating properties are included in FFO. Gains from newly-developed or re-developed properties less accumulated depreciation, if any, required under GAAP are also included in FFO on the basis that development services are the primary revenue generating activity; we believe that inclusion of these development gains is in compliance with the NAREIT definition of FFO, although others may interpret the definition differently.

Inflation

We were not significantly affected by inflation during the periods presented in this report due primarily to the relatively low inflation rates in our markets. Most of our tenants are obligated to pay their share of a building’s operating expenses to the extent such expenses exceed amounts established in their leases, based on historical expense levels. In addition, some of our tenants are obligated to pay their full share of a building’s operating expenses. These arrangements somewhat reduce our exposure to increases in such costs resulting from inflation.

Our costs associated with constructing buildings and completing renovation and tenant improvement work increased due to higher cost of materials. We expect to recover a portion of these costs through higher tenant rents and reimbursements for tenant improvements. The additional costs that we do not recover increase depreciation expense as projects are completed and placed into service.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to certain market risks, the most predominant of which is change in interest rates. Increases in interest rates can result in increased interest expense under our Revolving Credit Facility and our other mortgage loans payable carrying variable interest rate terms. Increases in interest rates can also result in increased interest expense when our loans payable carrying fixed interest rate terms mature and need to be refinanced. Our debt strategy favors long-term, fixed-rate, secured debt over variable-rate debt to minimize the risk of short-term increases in interest rates. As of June 30, 2006, 66.1% of our mortgage and other loans payable balance carried fixed interest rates and 92.7% of our fixed-rate loans were scheduled to mature after 2006. As of June 30, 2006, the percentage of variable-rate loans relative to total assets was 21.0%.

The following table sets forth our long-term debt obligations, principal cash flows by scheduled maturity and weighted average interest rates at June 30, 2006 (dollars in thousands):

	For the Periods Ended December 31,
	2006			2007			2008			2009			2010			Thereafter			Total
Long term debt:
Fixed rate (1)	$	68,785		$	86,899		$	155,916		$	61,791		$	73,128		$	500,749		$	947,268
Average interest rate	6.81		%	6.66		%	6.66		%	6.20		%	5.98		%	7.09		%	6.87		%
Variable rate	$	42,940		$	76,699		$	363,551		$	1,340		$	1,340		—			$	485,870
Average interest rate	8.17		%	6.97		%	7.72		%	10.05		%	10.05		%	—			8.05		%

(1) Represents scheduled principal maturities only and therefore excludes a net premium of $580,000.

The fair market value of our mortgage and other loans payable was approximately $1.408 billion at June 30, 2006.

The following table sets forth information pertaining to our derivative contracts in place as of June 30, 2006 and their fair values (dollars in thousands):

							Fair Value at
	Notional		One-Month		Effective	Expiration	June 30,
Nature of Derivative	Amount		LIBOR base		Date	Date	2006
Interest rate swap	$	50,000	5.0360	%	3/28/2006	3/30/2009	$	539
Interest rate swap	25,000		5.2320	%	5/1/2006	5/1/2009	147
Interest rate swap	25,000		5.2320	%	5/1/2006	5/1/2009	147

Based on our variable-rate debt balances, our interest expense would have increased by $1.7 million during the six months ended June 30, 2006 if interest rates were 1% higher.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) as of June 30, 2006. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of June 30, 2006 are functioning effectively to provide reasonable assurance that the information required to be disclosed by us in reports filed or submitted under the Securities Exchange Act of 1934 is (i) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and (ii) accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b) Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II

Item 1. Legal Proceedings

Jim Lemon and Robin Biser, as plaintiffs, initiated a suit on May 12, 2005, in The United States District Court for the District of Columbia (Case No. 1:05CV00949), against The Secretary of the United States Army, PenMar Development Corporation (“PMDC”) and the Company, as defendants, in connection with the pending acquisition by the Company of the former army base known as Fort Ritchie located in Cascade, Maryland. The Company has been under contract to acquire the property from PenMar Development Corporation since July 26, 2004. The plaintiffs allege violations of several federal statutes (National Environmental Policy Act, National Historic Preservation Act) and have requested, among other things, for the Court to enjoin the transfer of the property from the United States government to PMDC and the subsequent transfer to the Company.

We are not currently involved in any other material litigation nor, to our knowledge, is any material litigation currently threatened against the Company (other than routine litigation arising in the ordinary course of business, substantially all of which is expected to be covered by liability insurance).

Item 1A. Risk Factors

Not applicable

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

(a) During the three months ended June 30, 2006, 65,892 of the Operating Partnership’s common units were exchanged for 65,892 common shares in accordance with the Operating Partnership’s Second Amended and Restated Limited Partnership Agreement, as amended. The issuance of these common shares was effected in reliance upon the exemption from registration under Section 4(2) of the Securities Act of 1933, as amended.

(b) Not applicable

Item 3. Defaults Upon Senior Securities

(a) Not applicable

(b) Not applicable

Item 4. Submission of Matters to a Vote of Security Holders

On May 18, 2006, we held our annual meeting of shareholders. At the annual meeting, the shareholders voted on the election of three trustees, each for a three-year term. The voting results at the annual meeting were as follows:

Name of Nominee	Votes For	Votes Withheld
Thomas F. Brady	35,644,765	224,609
Steven D. Kesler	34,044,227	1,825,147
Kenneth D. Wethe	31,718,973	4,150,401

The terms of Jay H. Shidler, Clay W. Hamlin, III, Randall M. Griffin, Robert L. Denton and Kenneth S. Sweet, Jr. as trustees continued after the annual meeting.

Item 5. Other Information

Not applicable

Item 6. Exhibits

(a) Exhibits:

EXHIBIT NO.		DESCRIPTION
10.1		Amendment to Employment Agreement, dated May 30, 2006, between Corporate Office Properties, L.P., Corporate Office Properties Trust, and Randall M. Griffin (filed with the Company’s Current Report on Form 8-K dated June 1, 2006 and incorporated herein by reference).

10.2		Second Amendment to Employment Agreement, dated May 30, 2006, between Corporate Office Properties, L.P., Corporate Office Properties Trust, and Roger A. Waesche, Jr. (filed with the Company’s Current Report on Form 8-K dated June 1, 2006 and incorporated herein by reference).

EXHIBIT NO.		DESCRIPTION
10.3		Twentieth Amendment to Second Amended and Restated Limited Partnership Agreement of Corporate Office Properties, L.P., dated June 29, 2006 (filed with the Company’s Current Report on Form 8-K dated July 6, 2006 and incorporated herein by reference).

10.4		Twenty First Amendment to Second Amended and Restated Limited Partnership Agreement of Corporate Office Properties, L.P., dated July 20, 2006 (filed with the Company’s Current Report on Form 8-K dated July 26, 2006 and incorporated herein by reference).

10.5		Third Amendment to Employment Agreement, dated July 31, 2006, between Corporate Office Properties, L.P., Corporate Office Properties Trust, and Roger A. Waesche, Jr. (filed with the Company’s Current Report on Form 8-K dated August 1, 2006 and incorporated herein by reference).

10.6		Employment Agreement, dated July 31, 2006, between Corporate Office Properties, L.P., Corporate Office Properties Trust, and Stephen E. Riffee (filed with the Company’s Current Report on Form 8-K dated August 1, 2006 and incorporated herein by reference).

31.1		Certification of the Chief Executive Officer of Corporate Office Properties Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended (filed herewith).

31.2		Certification of the Chief Financial Officer of Corporate Office Properties Trust required by Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended (filed herewith).

32.1		Certification of the Chief Executive Officer of Corporate Office Properties Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Exchange Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.) (Furnished herewith.)

32.2		Certification of the Chief Financial Officer of Corporate Office Properties Trust required by Rule 13a-14(b) under the Securities Exchange Act of 1934, as amended. (This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Further, this exhibit shall not be deemed to be incorporated by reference into any filing under the Securities Exchange Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.) (Furnished herewith.)

(Mark one)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2006

or

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

Maryland		23-2947217
(State or other jurisdiction of		(IRS Employer
incorporation or organization)		Identification No.)

6711 Columbia Gateway Drive, Suite 300, Columbia MD		21046
(Address of principal executive offices)		(Zip Code)

		PAGE
PART I: FINANCIAL INFORMATION

Item 1:	Financial Statements:
	Consolidated Balance Sheets as of June 30, 2006 and December 31, 2005 (unaudited)	3
	Consolidated Statements of Operations for the three and six months ended June 30, 2006 and 2005 (unaudited)	4
	Consolidated Statements of Cash Flows for the six months ended June 30, 2006 and 2005 (unaudited)	5
	Notes to Consolidated Financial Statements	6
Item 2:	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Item 3:	Quantitative and Qualitative Disclosures About Market Risk	44
Item 4:	Controls and Procedures	45

PART II: OTHER INFORMATION

Item 1:	Legal Proceedings	45
Item 1A:	Risk Factors	45
Item 2:	Unregistered Sales of Equity Securities and Use of Proceeds	45
Item 3:	Defaults Upon Senior Securities	46
Item 4:	Submission of Matters to a Vote of Security Holders	46
Item 5:	Other Information	46
Item 6:	Exhibits	46


SIGNATURES		48

	CORPORATE OFFICE PROPERTIES TRUST


Date: August 9, 2006	By:	/s/ Randall M. Griffin
		Randall M. Griffin
		President and Chief Executive Officer


Date: August 9, 2006	By:	/s/ Roger A. Waesche, Jr.
		Roger A. Waesche, Jr.
		Executive Vice President and Chief Financial Officer