10-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)
þ	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 2011
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from          to

Commission File Number: 1-12675 (Kilroy Realty Corporation)

Commission File Number: 000-54005 (Kilroy Realty, L.P.)

KILROY REALTY CORPORATION

KILROY REALTY, L.P.

(Exact name of registrant as specified in its charter)

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

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

12200 W. Olympic Boulevard, Suite 200, Los Angeles, California 90064
(Address of principal executive offices) (Zip Code)

(310) 481-8400

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

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

Kilroy Realty Corporation  Yes þ     No o

Kilroy Realty, L. P.  Yes þ     No o

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

Kilroy Realty Corporation  Yes þ     No o

Kilroy Realty, L.P.  Yes þ     No o

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

Kilroy Realty Corporation

     Large accelerated filer þ Accelerated filer o Non-accelerated filer o Smaller reporting company o

(Do not check if a smaller reporting company)

Kilroy Realty, L.P.

     Large accelerated filer o Accelerated filer o Non-accelerated filer þ Smaller reporting company o

(Do not check if a smaller reporting company)

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

Kilroy Realty Corporation  Yes o     No þ

Kilroy Realty, L.P.  Yes o     No þ

As of July 25, 2011, 58,464,412 shares of Kilroy Realty Corporation common stock, par value $.01 per share, were outstanding.

EXPLANATORY NOTE

This report combines the quarterly reports on Form 10-Q for the period ended June 30, 2011 of Kilroy Realty Corporation and Kilroy Realty, L.P. Unless stated otherwise or the context otherwise requires, references to “Kilroy Realty Corporation” or the “Company” mean Kilroy Realty Corporation, a Maryland corporation, and its controlled and consolidated subsidiaries, and references to “Kilroy Realty, L.P.” or the “Operating Partnership” mean Kilroy Realty, L.P., a Delaware limited partnership, and its controlled and consolidated subsidiaries. The terms “the Company,” “we,” “our,” and “us” refer to the Company or the Company and the Operating Partnership together, as the context requires.

The Company is a real estate investment trust, or REIT, and the general partner of the Operating Partnership. As of June 30, 2011, the Company owned an approximate 97.1% common general partnership interest in the Operating Partnership. The remaining approximate 2.9% common limited partnership interests are owned by non-affiliated investors and certain directors and officers of the Company. As the sole general partner of the Operating Partnership, the Company exercises exclusive and complete discretion over the Operating Partnership’s day-to-day management and control and can cause it to enter into certain major transactions including acquisitions, dispositions, and refinancings and cause changes in its line of business, capital structure, and distribution policies.

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

Noncontrolling interests and stockholders’ equity and partners’ capital are the main areas of difference between the consolidated financial statements of the Company and those of the Operating Partnership. The common limited partnership interests in the Operating Partnership are accounted for as partners’ capital in the Operating Partnership’s financial statements and as noncontrolling interests in the Company’s financial statements. The Operating Partnership’s financial statements reflect the noncontrolling interest in Kilroy Realty Finance Partnership, L.P. This noncontrolling interest represents the Company’s 1% indirect general partnership interest in Kilroy Realty Finance Partnership, L.P., which is directly held by Kilroy Realty Finance, Inc., a wholly-owned subsidiary of the Company. The differences between stockholders’ equity, partners’ capital and noncontrolling interests result from the differences in the equity issued at the Company and the Operating Partnership levels and in the Company’s noncontrolling interest in Kilroy Realty Finance Partnership, L.P.

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

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

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

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

2

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

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

•   consolidated financial statements;

•   the following notes to the consolidated financial statements:

•   Note 5, Secured and Unsecured Debt of the Operating Partnership;

•   Note 6, Noncontrolling Interests on the Company’s Consolidated Financial Statements;

•   Note 7, Stockholders’ Equity of the Company;

•   Note 8, Partners’ Capital of the Operating Partnership;

•   Note 14, Net (Loss) Income Available to Common Stockholders per Share of the Company;

•   Note 15, Net (Loss) Income Available to Common Unitholders per Unit of the Operating Partnership;

•   Note 17, Pro Forma Results of the Company; and

•   Note 18, Pro Forma Results of the Operating Partnership.

This report also includes separate sections under Part I, Item 4. Controls and Procedures and separate Exhibit 31 and Exhibit 32 certifications for each of the Company and the Operating Partnership to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Company and Operating Partnership are compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and 18 U.S.C. § 1350.

3

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

QUARTERLY REPORT FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2011

TABLE OF CONTENTS

			Page
PART I—FINANCIAL INFORMATION
	Item 1.	FINANCIAL STATEMENTS OF KILROY REALTY CORPORATION		5
		Consolidated Balance Sheets as of June 30, 2011 (unaudited) and December 31, 2010		5
		Consolidated Statements of Operations for the Three and Six Months ended June 30, 2011 and 2010 (unaudited)		6
		Consolidated Statements of Equity for the Six Months ended June 30, 2011 and 2010 (unaudited)		7
		Consolidated Statements of Cash Flows for the Six Months ended June 30, 2011 and 2010 (unaudited)		8
	Item 1.	FINANCIAL STATEMENTS OF KILROY REALTY, L.P.		9
		Consolidated Balance Sheets as of June 30, 2011 (unaudited) and December 31, 2010		9
		Consolidated Statements of Operations for the Three and Six Months ended June 30, 2011 and 2010 (unaudited)		10
		Consolidated Statements of Capital for the Six Months ended June 30, 2011 and 2010 (unaudited)		11
		Consolidated Statements of Cash Flows for the Six Months ended June 30, 2011 and 2010 (unaudited)		12
		Notes to Consolidated Financial Statements		13
	Item 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS		34
	Item 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK		55
	Item 4.	CONTROLS AND PROCEDURES (KILROY REALTY CORPORATION AND KILROY REALTY, L.P.)		55
PART II—OTHER INFORMATION
	Item 1.	LEGAL PROCEEDINGS		56
	Item 1A	RISK FACTORS		56
	Item 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS		56
	Item 3.	DEFAULTS UPON SENIOR SECURITIES		56
	Item 4.	(REMOVED AND RESERVED)		56
	Item 5.	OTHER INFORMATION		56
	Item 6.	EXHIBITS		57
SIGNATURES				58
EX-31.1
EX-31.2
EX-31.3
EX-31.4
EX-32.1
EX-32.2
EX-32.3
EX-32.4
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

4

PART I—FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS OF KILROY REALTY CORPORATION

KILROY REALTY CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	June 30,			December 31,
	2011			2010
	(unaudited)
ASSETS
REAL ESTATE ASSETS:
Land and improvements (Note 2)	$	528,082		$	491,333
Buildings and improvements (Note 2)		2,820,766			2,435,173
Undeveloped land and construction in progress		303,998			290,365
Total real estate held for investment		3,652,846			3,216,871
Accumulated depreciation and amortization		(720,864	)		(672,429	)
Total real estate assets, net		2,931,982			2,544,442
CASH AND CASH EQUIVALENTS		25,412			14,840
RESTRICTED CASH		1,349			1,461
MARKETABLE SECURITIES (Note 12)		5,654			4,902
CURRENT RECEIVABLES, NET (Note 4)		4,732			6,258
DEFERRED RENT RECEIVABLES, NET (Note 4)		97,958			89,052
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)		153,231			131,066
DEFERRED FINANCING COSTS, NET (Note 5)		18,910			16,447
PREPAID EXPENSES AND OTHER ASSETS, NET		25,559			8,097
TOTAL ASSETS	$	3,264,787		$	2,816,565
LIABILITIES, NONCONTROLLING INTEREST AND EQUITY
LIABILITIES:
Secured debt, net (Notes 5 and 12)	$	475,820		$	313,009
Exchangeable senior notes, net (Notes 5 and 12)		303,374			299,964
Unsecured senior notes, net (Notes 5 and 12)		655,929			655,803
Unsecured line of credit (Notes 5 and 12)		245,000			159,000
Accounts payable, accrued expenses and other liabilities		66,664			68,525
Accrued distributions (Note 16)		22,563			20,385
Deferred revenue and acquisition-related intangible liabilities, net (Note 3)		90,149			79,322
Rents received in advance and tenant security deposits		28,117			29,189
Total liabilities		1,887,616			1,625,197
COMMITMENTS AND CONTINGENCIES (Note 11)
NONCONTROLLING INTEREST (Note 6):
7.45% Series A Cumulative Redeemable Preferred units of the Operating Partnership		73,638			73,638
EQUITY:
Stockholders’ Equity (Note 7):
Preferred stock, $.01 par value, 30,000,000 shares authorized:
7.45% Series A Cumulative Redeemable Preferred stock, $.01 par value, 1,500,000 shares authorized, none issued and outstanding		—			—
7.80% Series E Cumulative Redeemable Preferred stock, $.01 par value, 1,610,000 shares authorized, issued and outstanding ($40,250 liquidation preference)		38,425			38,425
7.50% Series F Cumulative Redeemable Preferred stock, $.01 par value, 3,450,000 shares authorized, issued and outstanding ($86,250 liquidation preference)		83,157			83,157
Common stock, $.01 par value, 150,000,000 shares authorized, 58,464,412 and 52,349,670 shares issued and outstanding, respectively		585			523
Additional paid-in capital		1,433,951			1,211,498
Distributions in excess of earnings		(285,916	)		(247,252	)
Total stockholders’ equity		1,270,202			1,086,351
Noncontrolling interest:
Common units of the Operating Partnership (Note 6)		33,331			31,379
Total equity		1,303,533			1,117,730
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND EQUITY	$	3,264,787		$	2,816,565

See accompanying notes to consolidated financial statements.

5

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

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

							Six Months Ended
	Three Months Ended June 30,						June 30,
	2011			2010			2011			2010
REVENUES:
Rental income	$	83,452		$	65,038		$	163,742		$	125,694
Tenant reimbursements		7,510			6,483			13,932			12,201
Other property income		1,102			895			2,515			1,340
Total revenues		92,064			72,416			180,189			139,235
EXPENSES:
Property expenses		17,583			14,543			35,272			26,563
Real estate taxes		8,413			6,482			16,582			12,518
Provision for bad debts		120			(12	)		146			14
Ground leases (Note 11)		424			370			763			312
General and administrative expenses		7,440			6,728			14,000			13,823
Acquisition-related expenses		1,194			957			1,666			1,270
Depreciation and amortization		32,248			23,722			61,559			44,660
Total expenses		67,422			52,790			129,988			99,160
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (losses) (Note 12)		58			(18	)		242			366
Interest expense (Note 5)		(21,228	)		(13,088	)		(42,104	)		(25,044	)
Loss on early extinguishment of debt		—			(4,564	)		—			(4,564	)
Total other (expenses) income		(21,170	)		(17,670	)		(41,862	)		(29,242	)
NET INCOME		3,472			1,956			8,339			10,833
Net loss (income) attributable to noncontrolling common units of the Operating Partnership		10			60			(24	)		(132	)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION		3,482			2,016			8,315			10,701
PREFERRED DISTRIBUTIONS AND DIVIDENDS:
Distributions to noncontrolling cumulative redeemable preferred units of the Operating Partnership		(1,397	)		(1,397	)		(2,794	)		(2,794	)
Preferred dividends		(2,402	)		(2,402	)		(4,804	)		(4,804	)
Total preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	$	(317	)	$	(1,783	)	$	717		$	3,103
Net (loss) income available to common stockholders per share-basic (Note 14)	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Net (loss) income available to common stockholders per share-diluted (Note 14)	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Weighted average common shares outstanding-basic (Note 14)		57,685,710			50,296,643			55,008,765			46,674,494
Weighted average common shares outstanding-diluted (Note 14)		57,685,710			50,296,643			55,384,729			46,677,850
Dividends declared per common share	$	0.35		$	0.35		$	0.70		$	0.70

See accompanying notes to consolidated financial statements.

6

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF EQUITY

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

																	Noncontrol-
																	ling Interests
			Common Stock											Total			– Common
								Additional			Distributions			Stock-			Units of the
	Preferred		Number of			Common		Paid-in			in Excess of			holders’			Operating			Total
	Stock		Shares			Stock		Capital			Earnings			Equity			Partnership			Equity
BALANCE AS OF DECEMBER 31, 2009	$	121,582		43,148,762		$	431	$	913,657		$	(180,722	)	$	854,948		$	28,890		$	883,838
Net income												10,701			10,701			132			10,833
Issuance of common stock				9,200,000			92		299,755						299,847						299,847
Issuance of share-based compensation awards				3,239					1,660						1,660						1,660
Noncash amortization of share-based compensation									3,361						3,361						3,361
Exercise of stock options				4,000					83						83						83
Repurchase of common stock and restricted stock units				(59,782	)				(2,121	)					(2,121	)					(2,121	)
Allocation to the equity component of cash paid upon repurchase of 3.25% Exchangeable Notes									(2,694	)					(2,694	)					(2,694	)
Adjustment for noncontrolling interest									(4,985	)					(4,985	)		4,985			—
Preferred distributions and dividends												(7,598	)		(7,598	)					(7,598	)
Dividends declared per common share and common unit ($0.70 per share/ unit)												(33,936	)		(33,936	)		(1,207	)		(35,143	)
BALANCE AS OF JUNE 30, 2010	$	121,582		52,296,219		$	523	$	1,208,716		$	(211,555	)	$	1,119,266		$	32,800		$	1,152,066
																	Noncontrol-
																	ling Interests
			Common Stock											Total			– Common
								Additional			Distributions			Stock-			Units of the
	Preferred		Number of			Common		Paid-in			in Excess of			holders’			Operating			Total
	Stock		Shares			Stock		Capital			Earnings			Equity			Partnership			Equity
BALANCE AS OF DECEMBER 31, 2010	$	121,582		52,349,670		$	523	$	1,211,498		$	(247,252	)	$	1,086,351		$	31,379		$	1,117,730
Net income												8,315			8,315			24			8,339
Issuance of common stock (Note 7)				6,037,500			61		220,954						221,015						221,015
Issuance of share-based compensation awards (Note 9)				68,727			1		2,155						2,156						2,156
Noncash amortization of share-based compensation									2,813						2,813						2,813
Exercise of stock options				15,000					395						395						395
Repurchase of common stock and restricted stock units (Note 9)				(11,485	)				(732	)					(732	)					(732	)
Exchange of common units of the Operating Partnership				5,000					91						91			(91	)		—
Adjustment for noncontrolling interest									(3,223	)					(3,223	)		3,223			—
Preferred distributions and dividends												(7,598	)		(7,598	)					(7,598	)
Dividends declared per common share and common unit ($0.70 per share/ unit)												(39,381	)		(39,381	)		(1,204	)		(40,585	)
BALANCE AS OF JUNE 30, 2011	$	121,582		58,464,412		$	585	$	1,433,951		$	(285,916	)	$	1,270,202		$	33,331		$	1,303,533

See accompanying notes to consolidated financial statements.

7

KILROY REALTY CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	8,339		$	10,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of building and improvements and leasing costs		61,029			44,229
Increase in provision for bad debts		146			14
Depreciation of furniture, fixtures and equipment		530			431
Noncash amortization of share-based compensation awards		2,239			3,519
Noncash amortization of deferred financing costs and debt discounts and premiums		6,884			5,750
Noncash amortization of above/(below) market rents (Note 3)		1,398			32
Loss on early extinguishment of debt		—			4,564
Noncash amortization of deferred revenue related to tenant-funded tenant improvements		(4,668	)		(4,775	)
Changes in operating assets and liabilities:
Marketable securities		(752	)		(635	)
Current receivables		1,380			483
Deferred rent receivables		(8,906	)		(5,421	)
Other deferred leasing costs		398			(2,594	)
Prepaid expenses and other assets		(3,519	)		(2,991	)
Accounts payable, accrued expenses and other liabilities		(6,384	)		(4,177	)
Deferred revenue		(577	)		507
Rents received in advance and tenant security deposits		(1,072	)		7,619
Net cash provided by operating activities		56,465			57,388
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties (Note 2)		(378,554	)		(373,574	)
Expenditures for operating properties		(28,230	)		(33,593	)
Expenditures for development and redevelopment properties and undeveloped land		(12,347	)		(8,113	)
Net increase in escrow deposits		(16,500	)		—
Decrease in restricted cash		112			1,096
Receipt of principal payments on note receivable		—			76
Net cash used in investing activities		(435,519	)		(414,108	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 7)		221,015			299,847
Borrowings on unsecured line of credit		302,000			288,000
Repayments on unsecured line of credit		(216,000	)		(235,000	)
Principal payments on secured debt		(3,403	)		(100,104	)
Repurchase of exchangeable senior notes		—			(151,097	)
Proceeds from issuance of secured debt (Note 5)		135,000			71,000
Proceeds from issuance of unsecured debt		—			247,870
Financing costs		(5,201	)		(4,643	)
Decrease in loan deposits		2,027			1,420
Repurchase of common stock and restricted stock units		(732	)		(2,121	)
Proceeds from exercise of stock options		395			83
Dividends and distributions paid to common stockholders and common unitholders		(37,877	)		(31,392	)
Dividends and distributions paid to preferred stockholders and preferred unitholders		(7,598	)		(7,598	)
Net cash provided by financing activities		389,626			376,265
Net increase in cash and cash equivalents		10,572			19,545
Cash and cash equivalents, beginning of period		14,840			9,883
Cash and cash equivalents, end of period	$	25,412		$	29,428
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $3,327 and $4,055 as of June 30, 2011 and 2010, respectively	$	34,568		$	18,634
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	$	9,966		$	11,378
Tenant improvements funded directly by tenants to third parties	$	3,027		$	1,946
Assumption of secured debt with property acquisition (Notes 2 and 5)	$	30,042		$	51,079
Assumption of other liabilities with property acquisitions (Note 2)	$	4,438		$	6,369
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	$	21,064		$	18,907
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	$	1,909		$	1,909
Issuance of share-based compensation awards (Note 9)	$	7,216		$	5,418
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$	91		$	—

See accompanying notes to consolidated financial statements.

8

ITEM 1: FINANCIAL STATEMENTS OF KILROY REALTY, L.P.

KILROY REALTY, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except unit data)

	June 30,			December 31,
	2011			2010
	(unaudited)
ASSETS
REAL ESTATE ASSETS:
Land and improvements (Note 2)	$	528,082		$	491,333
Buildings and improvements (Note 2)		2,820,766			2,435,173
Undeveloped land and construction in progress		303,998			290,365
Total real estate held for investment		3,652,846			3,216,871
Accumulated depreciation and amortization		(720,864	)		(672,429	)
Total real estate assets, net		2,931,982			2,544,442
CASH AND CASH EQUIVALENTS		25,412			14,840
RESTRICTED CASH		1,349			1,461
MARKETABLE SECURITIES (Note 12)		5,654			4,902
CURRENT RECEIVABLES, NET (Note 4)		4,732			6,258
DEFERRED RENT RECEIVABLES, NET (Note 4)		97,958			89,052
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)		153,231			131,066
DEFERRED FINANCING COSTS, NET (Note 5)		18,910			16,447
PREPAID EXPENSES AND OTHER ASSETS, NET		25,559			8,097
TOTAL ASSETS	$	3,264,787		$	2,816,565
LIABILITIES, NONCONTROLLING INTEREST AND CAPITAL
LIABILITIES:
Secured debt, net (Notes 5 and 12)	$	475,820		$	313,009
Exchangeable senior notes, net (Notes 5 and 12)		303,374			299,964
Unsecured senior notes, net (Notes 5 and 12)		655,929			655,803
Unsecured line of credit (Notes 5 and 12)		245,000			159,000
Accounts payable, accrued expenses and other liabilities		66,664			68,525
Accrued distributions (Note 16)		22,563			20,385
Deferred revenue and acquisition-related intangible liabilities, net (Note 3)		90,149			79,322
Rents received in advance and tenant security deposits		28,117			29,189
Total liabilities		1,887,616			1,625,197
COMMITMENTS AND CONTINGENCIES (Note 11)
7.45% SERIES A CUMULATIVE REDEEMABLE PREFERRED UNITS		73,638			73,638
CAPITAL:
Partners’ Capital (Note 8):
7.80% Series E Cumulative Redeemable Preferred units, 1,610,000 units issued and outstanding ($40,250 liquidation preference)		38,425			38,425
7.50% Series F Cumulative Redeemable Preferred units, 3,450,000 units issued and outstanding ($86,250 liquidation preference)		83,157			83,157
Common units, 58,464,412 and 52,349,670 held by the general partner and 1,718,131 and 1,723,131 held by common limited partners issued and outstanding, respectively		1,180,249			994,511
Total partners’ capital		1,301,831			1,116,093
Noncontrolling interest in consolidated subsidiaries		1,702			1,637
Total capital		1,303,533			1,117,730
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND CAPITAL	$	3,264,787		$	2,816,565

See accompanying notes to consolidated financial statements.

9

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
REVENUES:
Rental income	$	83,452			65,038		$	163,742		$	125,694
Tenant reimbursements		7,510			6,483			13,932			12,201
Other property income		1,102			895			2,515			1,340
Total revenues		92,064			72,416			180,189			139,235
EXPENSES:
Property expenses		17,583			14,543			35,272			26,563
Real estate taxes		8,413			6,482			16,582			12,518
Provision for bad debts		120			(12	)		146			14
Ground leases (Note 11)		424			370			763			312
General and administrative expenses		7,440			6,728			14,000			13,823
Acquisition-related expenses		1,194			957			1,666			1,270
Depreciation and amortization		32,248			23,722			61,559			44,660
Total expenses		67,422			52,790			129,988			99,160
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (losses) (Note 12)		58			(18	)		242			366
Interest expense (Note 5)		(21,228	)		(13,088	)		(42,104	)		(25,044	)
Loss on early extinguishment of debt		—			(4,564	)		—			(4,564	)
Total other (expenses) income		(21,170	)		(17,670	)		(41,862	)		(29,242	)
NET INCOME		3,472			1,956			8,339			10,833
Net income attributable to noncontrolling interests in consolidated subsidiaries		(32	)		(51	)		(65	)		(96	)
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.		3,440			1,905			8,274			10,737
PREFERRED DISTRIBUTIONS		(3,799	)		(3,799	)		(7,598	)		(7,598	)
NET (LOSS) INCOME AVAILABLE TO COMMON UNITHOLDERS	$	(359	)	$	(1,894	)	$	676		$	3,139
Net (loss) income available to common unitholders per unit-basic (Note 15)	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Net (loss) income available to common unitholders per unit-diluted (Note 15)	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Weighted average common units outstanding-basic (Note 15)		59,407,687			52,019,774			56,731,316			48,397,625
Weighted average common units outstanding-diluted (Note 15)		59,407,687			52,019,774			57,107,280			48,400,981
Distributions declared per common unit	$	0.35		$	0.35		$	0.70		$	0.70

See accompanying notes to consolidated financial statements.

10

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CAPITAL

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

	Partners’											Noncontrolling
	Capital											Interests
			Number of						Total			in
	Preferred		Common			Common			Partners’			Consolidated			Total
	Units		Units			Units			Capital			Subsidiaries			Capital
BALANCE AS OF DECEMBER 31, 2009	$	121,582		44,871,893		$	760,756		$	882,338		$	1,500		$	883,838
Net income							10,737			10,737			96			10,833
Issuance of common units				9,200,000			299,847			299,847						299,847
Issuance of share-based compensation awards				3,239			1,660			1,660						1,660
Noncash amortization of share-based compensation							3,361			3,361						3,361
Exercise of stock options				4,000			83			83						83
Repurchase of common units and restricted stock units				(59,782	)		(2,121	)		(2,121	)					(2,121	)
Allocation to the equity component of cash paid upon repurchase of 3.25% Exchangeable Notes							(2,694	)		(2,694	)					(2,694	)
Other							20			20			(20	)		—
Preferred distributions							(7,598	)		(7,598	)					(7,598	)
Distributions declared per common unit ($0.70 per unit)							(35,143	)		(35,143	)					(35,143	)
BALANCE AS OF JUNE 30, 2010	$	121,582		54,019,350		$	1,028,908		$	1,150,490		$	1,576		$	1,152,066

	Partners’											Noncontrolling
	Capital											Interests
			Number of						Total			in
	Preferred		Common			Common			Partners’			Consolidated		Total
	Units		Units			Units			Capital			Subsidiaries		Capital
BALANCE AS OF DECEMBER 31, 2010	$	121,582		54,072,801		$	994,511		$	1,116,093		$	1,637	$	1,117,730
Net income							8,274			8,274			65		8,339
Issuance of common units (Note 8)				6,037,500			221,015			221,015					221,015
Issuance of share-based compensation awards (Note 9)				68,727			2,156			2,156					2,156
Noncash amortization of share-based compensation							2,813			2,813					2,813
Exercise of stock options				15,000			395			395					395
Repurchase of common units and restricted stock units (Note 9)				(11,485	)		(732	)		(732	)				(732	)
Preferred distributions							(7,598	)		(7,598	)				(7,598	)
Distributions declared per common unit ($0.70 per unit)							(40,585	)		(40,585	)				(40,585	)
BALANCE AS OF JUNE 30, 2011	$	121,582		60,182,543		$	1,180,249		$	1,301,831		$	1,702	$	1,303,533

See accompanying notes to consolidated financial statements.

11

KILROY REALTY, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Six Months Ended June 30,
	2011			2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	8,339		$	10,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of building and improvements and leasing costs		61,029			44,229
Increase in provision for bad debts		146			14
Depreciation of furniture, fixtures and equipment		530			431
Noncash amortization of share-based compensation awards		2,239			3,519
Noncash amortization of deferred financing costs and debt discounts and premiums		6,884			5,750
Noncash amortization of above/(below) market rents (Note 3)		1,398			32
Loss on early extinguishment of debt		—			4,564
Noncash amortization of deferred revenue related to tenant-funded tenant improvements		(4,668	)		(4,775	)
Changes in operating assets and liabilities:
Marketable securities		(752	)		(635	)
Current receivables		1,380			483
Deferred rent receivables		(8,906	)		(5,421	)
Other deferred leasing costs		398			(2,594	)
Prepaid expenses and other assets		(3,519	)		(2,991	)
Accounts payable, accrued expenses and other liabilities		(6,384	)		(4,177	)
Deferred revenue		(577	)		507
Rents received in advance and tenant security deposits		(1,072	)		7,619
Net cash provided by operating activities		56,465			57,388
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties (Note 2)		(378,554	)		(373,574	)
Expenditures for operating properties		(28,230	)		(33,593	)
Expenditures for development and redevelopment properties and undeveloped land		(12,347	)		(8,113	)
Net increase in escrow deposits		(16,500	)		—
Decrease in restricted cash		112			1,096
Receipt of principal payments on note receivable		—			76
Net cash used in investing activities		(435,519	)		(414,108	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common units (Note 8)		221,015			299,847
Borrowings on unsecured line of credit		302,000			288,000
Repayments on unsecured line of credit		(216,000	)		(235,000	)
Principal payments on secured debt		(3,403	)		(100,104	)
Repurchase of exchangeable senior notes		—			(151,097	)
Proceeds from issuance of secured debt (Note 5)		135,000			71,000
Proceeds from issuance of unsecured debt		—			247,870
Financing costs		(5,201	)		(4,643	)
Decrease in loan deposits		2,027			1,420
Repurchase of common units and restricted stock units		(732	)		(2,121	)
Proceeds from exercise of stock options		395			83
Distributions paid to common unitholders		(37,877	)		(31,392	)
Distributions paid to preferred unitholders		(7,598	)		(7,598	)
Net cash provided by financing activities		389,626			376,265
Net increase in cash and cash equivalents		10,572			19,545
Cash and cash equivalents, beginning of period		14,840			9,883
Cash and cash equivalents, end of period	$	25,412		$	29,428
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $3,327 and $4,055 as of June 30, 2011 and 2010, respectively	$	34,568		$	18,634
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	$	9,966		$	11,378
Tenant improvements funded directly by tenants to third parties	$	3,027		$	1,946
Assumption of secured debt with property acquisitions (Notes 2 and 5)	$	30,042		$	51,079
Assumption of other liabilities with property acquisitions (Note 2)	$	4,438		$	6,369
NONCASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders	$	21,064			18,907
Accrual of distributions payable to preferred unitholders	$	1,909		$	1,909
Issuance of share-based compensation awards (Note 9)	$	7,216		$	5,418

See accompanying notes to consolidated financial statements.

12

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Six Months Ended June 30, 2011 and 2010

(unaudited)

1.   Organization and Basis of Presentation

Organization

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in office and industrial submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego, greater Seattle and the San Francisco Bay Area, which we believe have strategic advantages and strong barriers to entry. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the term “Kilroy Realty Corporation” or the “Company” refers to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The terms “the Company,” “we,” “our,” and “us” refer to the Company or the Company and the Operating Partnership together, as the context requires. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

The following table of office buildings (the “Office Properties”) and industrial buildings (the “Industrial Properties”) summarizes our stabilized portfolio of operating properties as of June 30, 2011. As of June 30, 2011, all of our properties and all of our business is currently conducted in the state of California with the exception of the operation of six office properties located in the state of Washington.

	Number of		Rentable		Number of
	Buildings		Square Feet		Tenants		Percentage Occupied
Office Properties(1)		107		11,465,821		416		87.9	%
Industrial Properties		40		3,605,407		62		97.6	%
Total Stabilized Portfolio		147		15,071,228		478		90.2	%

(1) Includes eight office properties acquired during the six months ended June 30, 2011 for a total amount of $413.0 million (see Note 2 for additional information).

Our stabilized portfolio excludes undeveloped land, development and redevelopment properties currently under construction or committed for construction, “lease-up” properties, and one property that we are in the process of repositioning for residential use. As of June 30, 2011, we had one office redevelopment property encompassing approximately 300,000 rentable square feet under construction and we had one office redevelopment property encompassing approximately 98,000 rentable square feet which we removed from the stabilized portfolio since it was committed for redevelopment. We define “lease-up” properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. We had no “lease-up” properties as of June 30, 2011.

As of June 30, 2011, the Company owned a 97.1% general partnership interest in the Operating Partnership. The remaining 2.9% common limited partnership interest in the Operating Partnership as of June 30, 2011 was owned by non-affiliated investors and certain of our directors and officers (see Note 6). Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. The number of common units held by the Company is at all times equivalent to the number of outstanding shares of the Company’s common stock, and the entitlements of all the common units to quarterly distributions and payments in liquidation mirror those of the the Company’s common stockholders. The common limited partners have certain redemption

13

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

rights as provided in the Operating Partnership’s Fifth Amended and Restated Agreement of Limited Partnership (as amended, the “Partnership Agreement”) (see Note 6).

Kilroy Realty Finance, Inc., our wholly-owned subsidiary, is the sole general partner of the Finance Partnership and owns a 1.0% general partnership interest. The Operating Partnership owns the remaining 99.0% limited partnership interest. Kilroy Services, LLC (“KSLLC”), which is a wholly-owned subsidiary of the Operating Partnership, is the entity through which we conduct substantially all of our development activities. With the exception of the Operating Partnership, all of our subsidiaries, which include Kilroy Realty TRS, Inc., Kilroy Realty Management, L.P., Kilroy RB, LLC, Kilroy RB II, LLC, Kilroy Realty Northside Drive, LLC, and Kilroy Realty 303, LLC, are wholly-owned.

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, and all of our wholly-owned subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, and all wholly-owned subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

The consolidated financial statements of the Company and the Operating Partnership also include variable interest entities (“VIE”) in which we are deemed to be the primary beneficiary. As of June 30, 2011, we had one bankruptcy-remote VIE, Kilroy Realty Northside Drive, LLC, which was formed in 2010 to hold three properties that secure the debt we assumed when we acquired the properties in 2010. The assets held by this entity are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

Change in Reportable Segments from Form 10-K for the year ended December 31, 2010

Our chief operating decision-makers internally evaluate the operating performance and financial results of our portfolio based on Net Operating Income for the following two segments of commercial real estate property: Office Properties and Industrial Properties. We define “Net Operating Income” as operating revenues (rental income, tenant reimbursements, and other property income) less operating expenses (property expenses, real estate taxes, provision for bad debts, and ground leases).

During the three and six months ended June 30, 2011, the amount of revenues and Net Operating Income generated by our Industrial Properties, in relation to our total consolidated operating portfolio revenues and Net Operating Income, had fallen below the required 10% quantitative reporting thresholds for the Industrial Properties to be considered a reportable segment under GAAP. Therefore, for the three and six months ended June 30, 2011,

14

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

our only reportable segment is our Office Properties segment. See Note 13 for a reconciliation of our Office Properties segment to our consolidated revenues, Net Operating Income, net income and consolidated assets.

2.   Acquisitions

During the six months ended June 30, 2011, we acquired the eight office properties listed below from unrelated third parties. Unless otherwise noted, we funded these acquisitions principally with the net proceeds from the Company’s public offering of common stock (see Note 7), and borrowings under the unsecured line of credit (see Note 5).

							Percentage
							Occupied
					Rentable		as of			Purchase
	Property	Date of	Number of		Square		June 30,			Price
Property	Type	Acquisition	Buildings		Feet		2011			(in millions)(1)
250 Brannan Street San Francisco, CA	Office	January 28, 2011		1		90,742		76.7	%	$	33.0
10210, 10220, and 10230 NE Points Drive; 3933 Lake Washington Boulevard NE Kirkland, WA(2)	Office	April 21, 2011		4		279,924		87.3	%		100.1
10770 Wateridge Circle San Diego, CA	Office	May 12, 2011		1		174,310		97.5	%		32.7
601 108th Avenue N.E. Bellevue, WA	Office	June 3, 2011		1		488,470		89.8	%		215.0
4040 Civic Center Drive San Rafael, CA	Office	June 9, 2011		1		126,787		93.1	%		32.2
Total				8		1,160,233				$	413.0

(1)	Excludes acquisition-related costs.
(2)	In connection with this acquisition, we assumed secured debt with an outstanding principal balance of $30.0 million and a premium of $1.0 million as a result of recording this debt at fair value on the acquisition date (see Note 5).

15

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The related assets, liabilities, and results of operations of all acquired properties are included in the consolidated financial statements as of the date of acquisition. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the respective acquisition dates:

	601 108th Avenue		All Other
	N.E., Bellevue, WA(1)		Acquisitions(2)		Total
	(in thousands)
Assets
Land(3)	$	—	$	36,740	$	36,740
Buildings and improvements(4)		214,095		143,545		357,640
Undeveloped land		—		2,560		2,560
Deferred leasing costs and acquisition-related intangible assets(5)		13,790		17,500		31,290
Total assets acquired		227,885		200,345		428,230
Liabilities
Deferred revenue and acquisition-related intangible liabilities(6)		12,850		1,390		14,240
Secured debt(7)		—		30,997		30,997
Accounts payable, accrued expenses and other liabilities		2,380		2,059		4,439
Total liabilities assumed		15,230		34,446		49,676
Net assets and liabilities acquired(8)	$	212,655	$	165,899	$	378,554

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The purchase price of all other acquisitions completed during the six months ended June 30, 2011 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2010.
(3)	In connection with the acquisition of 601 108th Avenue N.E., Bellevue, WA,, we assumed the lessee obligations under a noncancellable ground lease that is scheduled to expire in November 2093 (see Notes 3 and 11).
(4)	Represents buildings, building improvements, and tenant improvements.
(5)	Represents in-place leases (approximately $18.9 million with a weighted average amortization period of 4.1 years), above-market leases (approximately $6.6 million with a weighted average amortization period of 4.5 years), and unamortized leasing commissions (approximately $5.7 million with a weighted average amortization period of 2.8 years).
(6)	Represents below-market leases (approximately $9.0 million with a weighted average amortization period of 4.3 years) and an above-market ground lease obligation (approximately $5.2 million with a weighted average amortization period of 82.5 years), under which we are the lessee.
(7)	Represents the mortgage loan, which includes an unamortized premium of approximately $1.0 million, assumed in connection with the properties acquired in April 2011 (see Note 5).
(8)	Reflects the purchase price net of assumed secured debt and other lease-related obligations.

16

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

3.   Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net

The following table summarizes our identified deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market leases, and in-place leases) and intangible liabilities (acquired value of below-market leases and above-market ground lease obligation) as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net(1):
Deferred leasing costs	$	131,098		$	128,980
Accumulated amortization		(43,921	)		(45,869	)
Deferred leasing costs, net		87,177			83,111
Above-market leases		27,922			21,321
Accumulated amortization		(4,747	)		(2,163	)
Above-market leases, net		23,175			19,158
In-place leases		50,915			36,964
Accumulated amortization		(8,036	)		(8,167	)
In-place leases, net		42,879			28,797
Total deferred leasing costs and acquisition-related intangible assets, net	$	153,231		$	131,066
Acquisition-related Intangible Liabilities, net(1)(2):
Below-market leases	$	27,152		$	21,938
Accumulated amortization		(2,462	)		(5,094	)
Below-market leases, net		24,690			16,844
Above-market ground lease obligation		5,200			—
Accumulated amortization		(5	)		—
Above-market ground lease obligation, net		5,195			—
Total acquisition-related intangible liabilities, net	$	29,885		$	16,844

(1)

Balances and accumulated amortization amounts at June 30, 2011 reflect the write-off of the following fully amortized amounts at January 1, 2011: deferred leasing costs (approximately $10.4 million), in-place leases (approximately $5.0 million), and below-market leases (approximately $3.8 million). Our accounting policy is to write-off the asset and corresponding accumulated amortization for fully amortized balances on January 1st of each fiscal year.

(2)

Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

17

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended
	June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Deferred leasing costs(1)	$	3,970	$	2,968	$	7,738	$	5,673
Net above-market leases(2)		745		60		1,398		32
In-place leases(1)		2,686		267		4,859		285
Above-market ground lease obligation(3)		5		—		5		—
Total	$	7,406	$	3,295	$	14,000	$	5,990

(1)	The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
(2)	The amortization of net above-market leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.
(3)	The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of June 30, 2011 for future periods:

								Above-Market
	Deferred Leasing		Net Above-/(Below)-			In-Place		Ground Lease
Year Ending	Costs		Market Leases(1)			Leases		Obligation
	(in thousands)
Remaining 2011	$	8,946	$	706		$	6,165	$	32
2012		16,558		1,303			10,766		63
2013		14,751		1,062			8,682		63
2014		13,042		324			6,922		63
2015		9,859		(220	)		3,991		63
Thereafter		24,021		(4,690	)		6,353		4,911
Total	$	87,177	$	(1,515	)	$	42,879	$	5,195

(1) Represents estimated annual net amortization related to above-/(below)-market leases. Amounts shown for 2011-2014 represent net above-market leases which will be recorded as a decrease to rental income in the consolidated statement of operations, and amounts shown for the periods 2015 and thereafter represent net below-market leases which will be recorded as an increase to rental income in the consolidated statement of operations.

18

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

4.   Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Current receivables	$	7,655		$	9,077
Allowance for uncollectible tenant receivables		(2,923	)		(2,819	)
Current receivables, net	$	4,732		$	6,258

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred rent receivables	$	101,780		$	92,883
Allowance for deferred rent receivables		(3,822	)		(3,831	)
Deferred rent receivables, net	$	97,958		$	89,052

5.   Secured and Unsecured Debt of the Operating Partnership

Secured Debt

In January 2011, the Operating Partnership borrowed $135.0 million under a mortgage loan that is scheduled to mature on February 1, 2018. The mortgage loan is secured by our 303 Second Street property in San Francisco, bears interest at an annual rate of 4.27%, and requires interest-only payments for the first two years with a 30-year amortization schedule thereafter. We used a portion of the proceeds to repay borrowings under the Operating Partnership’s unsecured line of credit (the “Credit Facility”).

In April 2011, in connection with the acquisition of four office buildings in Kirkland, Washington, the Operating Partnership assumed a mortgage loan that is secured by the project. The assumed mortgage loan had a principal balance of $30.0 million at the acquisition date and is scheduled to mature on April 15, 2015. This mortgage loan was recorded at fair value on the date of the acquisition resulting in a premium of approximately $1.0 million. This premium will be accreted on a straight-line basis, which approximates the effective interest method, as a reduction to interest expense from the acquisition date through the maturity date of the mortgage loan. The loan bears contractual interest at an annual rate of 4.94% and requires monthly principal and interest payments based on a 30-year amortization period.

Although both new mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments, and environmental liabilities.

19

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Exchangeable Senior Notes

The following table summarizes the balance and significant terms of the Company’s 3.25% Exchangeable Notes due 2012 (the “3.25% Exchangeable Notes”) and 4.25% Exchangeable Notes due 2014 (the “4.25% Exchangeable Notes” and together with the 3.25% Exchangeable Notes, the “Exchangeable Notes”) outstanding as of June 30, 2011 and December 31, 2010:

	3.25% Exchangeable Notes						4.25% Exchangeable Notes
	June 30,			December 31,			June 30,			December 31,
	2011			2010			2011			2010
	(in thousands)
Principal amount	$	148,000		$	148,000		$	172,500		$	172,500
Unamortized discount		(2,485	)		(4,004	)		(14,641	)		(16,532	)
Net carrying amount of liability component	$	145,515		$	143,996		$	157,859		$	155,968
Carrying amount of equity component	$33,675						$19,835
Maturity date	April 2012						November 2014
Stated coupon rate	3.25%(1)						4.25%(2)
Effective interest rate(3)	5.45%						7.13%
Exchange rate per $1,000 principal value of the Exchangeable Notes, as adjusted(4)	11.3636						27.8307
Exchange price, as adjusted(4)	$88.00						$35.93
Number of shares on which the aggregate consideration to be delivered on conversion is determined(4)	1,681,813						4,800,796

(1)	Interest on the 3.25% Exchangeable Notes is payable semi-annually in arrears on April 15th and October 15th of each year.
(2)	Interest on the 4.25% Exchangeable Notes is payable semi-annually in arrears on May 15th and November 15th of each year.
(3)	The rate at which we record interest expense for financial reporting purposes, which reflects the amortization of the discounts on the Exchangeable Notes. This rate represents our conventional debt borrowing rate at the date of issuance.
(4)	The exchange rate, exchange price, and the number of shares to be delivered upon conversion are subject to adjustment under certain circumstances including increases in our common dividends.

Capped Call Transactions

In connection with the offerings of the Exchangeable Notes, we entered into capped call option transactions (“capped calls”) to mitigate the dilutive impact of the potential exchange of the Exchangeable Notes. The following table summarizes our capped call option positions as of both June 30, 2011 and December 31, 2010:

	3.25% Exchangeable Notes(1)		4.25% Exchangeable Notes(2)
Referenced shares of common stock		1,121,201		4,800,796
Exchange price including effect of capped calls		$102.72		$42.81

(1)	The capped calls mitigate the dilutive impact to us of the potential exchange of two-thirds of the 3.25% Exchangeable Notes into shares of common stock.
(2)	The capped calls mitigate the dilutive impact to us of the potential exchange of all of the 4.25% Exchangeable Notes into shares of common stock.

For the three and six months ended June 30, 2011, the per share average trading price of the Company’s common stock on the New York Stock Exchange (“NYSE”) was higher than the $35.93 exchange price for the 4.25% Exchangeable Notes, as presented below:

	Three Months Ended		Six Months Ended
	June 30, 2011		June 30, 2011
Average Trading Price of the Company’s Stock	$	39.90	$	38.94

As a result, even though there would be no dilutive economic impact to our earnings until the Company’s share price exceeded $42.81, which is the exchange price after the impact of the capped calls, and even though the 4.25%

20

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Exchangeable Notes were not convertible as of June 30, 2011, we are required to include the dilutive impact of the 4.25% Exchangeable Notes based on the average share price in our diluted earnings per share and per unit calculations for the six months ended June 30, 2011 (see Notes 14 and 15). We are not required to include the the dilutive impact of the 4.25% Exchangeable Notes in our diluted earnings per share and per unit calculations for the three months ended June 30, 2011, since we had a net loss available to common stockholders and unitholders during this period and the effect would be anti-dilutive (see Notes 14 and 15). If the 4.25% Exchangeable Notes were able to be converted as of June 30, 2011, the approximate fair value of the shares upon conversion at that date would have been equal to approximately $191.4 million, which would exceed the $172.5 million principal amount of the 4.25% Exchangeable Notes by approximately $18.9 million.

Interest Expense for the Exchangeable Notes

The unamortized discount on the Exchangeable Notes is accreted as additional interest expense from the date of issuance through the maturity date of the applicable Exchangeable Notes. The following table summarizes the total interest expense attributable to the Exchangeable Notes based on the effective interest rates set forth above, before the effect of capitalized interest, for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Contractual interest payments	$	3,035	$	4,241	$	6,070	$	8,495
Amortization of discount		1,722		2,372		3,410		4,679
Interest expense attributable to the Exchangeable Notes	$	4,757	$	6,613	$	9,480	$	13,174

Unsecured Line of Credit

In June 2011, we amended the terms of our Credit Facility to extend the maturity date, and reduce the interest rate and facility fee. The following table summarizes the terms of our Credit Facility as of December 31, 2010 and as amended as of June 30, 2011:

	June 30,		December 31,
	2011		2010
	(in thousands)
Outstanding borrowings	$	245,000	$	159,000
Remaining borrowing capacity		255,000		341,000
Total borrowing capacity(1)	$	500,000	$	500,000
Interest rate(2)		2.87%		2.99%
Facility fee-annual rate(3)		0.350%		0.575%
Maturity date(4)		August 2015		August 2013

(1)	We may elect to borrow, subject to lender approval, up to an additional $200 million under an accordion feature under the terms of the Credit Facility.
(2)	The Credit Facility interest rate included interest at an annual rate of LIBOR plus 1.750% and 2.675% as of June 30, 2011 and December 31, 2010, respectively.
(3)	The facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we also incurred debt origination and legal costs of approximately $5.0 million when we entered into the Credit Facility in 2010 and an additional $3.3 million when we amended the Credit Facility in 2011. The unamortized balance of these costs will be amortized as additional interest expense over the extended term of the Credit Facility.
(4)	Under the terms of the Credit Facility, we may exercise an option to extend the maturity date by one year.

The Company intends to borrow amounts under the Credit Facility from time to time for general corporate purposes, to fund potential acquisitions, to finance development and redevelopment expenditures, and to potentially repay long-term debt.

21

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Debt Covenants and Restrictions

The Credit Facility, the unsecured senior notes, and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio, and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full or partial principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of June 30, 2011.

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments, excluding debt discounts and premiums, as of June 30, 2011:

Year Ending	(in thousands)
Remaining 2011	$	72,262
2012		305,303
2013		6,373
2014		262,443
2015		602,382
Thereafter		450,028
Total	$	1,698,791	(1)

(1) Includes gross principal balance of outstanding debt before impact of all debt discounts and premiums.

Capitalized Interest and Loan Fees

The following table sets forth our gross interest expense, including debt discount/premium and loan cost amortization, net of capitalized interest, for the three and six months ended June 30, 2011 and 2010. The capitalized amounts are a cost of development and redevelopment, and increase the carrying value of undeveloped land and construction in progress.

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Gross interest expense	$	23,293		$	15,897		$	46,148		$	30,437
Capitalized interest		(2,065	)		(2,809	)		(4,044	)		(5,393	)
Interest expense	$	21,228		$	13,088		$	42,104		$	25,044

6.   Noncontrolling Interests on the Company’s Consolidated Financial Statements

7.45% Series A Cumulative Redeemable Preferred Units of the Operating Partnership

As of both June 30, 2011 and December 31, 2010, the Operating Partnership had outstanding 1,500,000 7.45% Series A Cumulative Redeemable Preferred Units representing preferred limited partnership interests in the Operating Partnership with a redemption value of $50.00 per unit. There were no changes to this noncontrolling interest during the three and six months ended June 30, 2011 and 2010.

Common Units of the Operating Partnership

The Company owned a 97.1%, 96.8% and 96.7% common general partnership interest in the Operating Partnership as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. The remaining 2.9%, 3.2%

22

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

and 3.3% common limited partnership interest as of June 30, 2011, December 31, 2010 and June 30, 2010, respectively, was owned in the form of common units by non-affiliate investors and certain of our executive officers and directors. There were 1,718,131 and 1,723,131 common units outstanding held by these investors, executive officers and directors as of June 30, 2011 and December 31, 2010, respectively.

The noncontrolling common units may be redeemed by unitholders for cash. We, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. Whether satisfied in cash or shares of the Company’s common stock, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $66.6 million and $61.4 million as of June 30, 2011 and December 31, 2010, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the amount payable with respect to each share of the Company’s common stock.

7.   Stockholders’ Equity of the Company

Issuance of Common Stock

In April 2011, the Company completed an underwritten public offering of 6,037,500 shares of its common stock. The net offering proceeds, after deducting underwriting discounts and commissions and offering expenses, were approximately $221.0 million. We have used or, intend to use a portion of the net proceeds from the offering to fund acquisitions and for general corporate purposes.

8.   Partners’ Capital of the Operating Partnership

Issuance of Common Units

In April 2011, the Company completed an underwritten public offering of 6,037,500 shares of its common stock as discussed in Note 7. The net offering proceeds of approximately $221.0 million were contributed by the Company to the Operating Partnership in exchange for 6,037,500 common units.

Common Units Outstanding

The Company owned 58,464,412, 52,349,670, and 52,296,219 common units representing a 97.1%, 96.8%, and 96.7% common general partnership interest in the Operating Partnership as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. The remaining 2.9%, 3.2%, and 3.3% common limited partnership interest as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively, was owned by non-affiliate investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 1,718,131, 1,723,131, and 1,723,131 common units outstanding held by these investors, executive officers and directors as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. For a further discussion of the noncontrolling common units as of June 30, 2011 and December 31, 2010, please refer to Note 6.

9.   Share-Based Compensation

Stockholder Approved Equity Compensation Plans

As of June 30, 2011, we had one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan as amended (the “2006 Plan”). As of June 30, 2011, 3,821,041 shares were available for grant under the 2006 Plan. The number of shares that remains available for grant is calculated using the weighted share counting provisions set forth in the 2006 Plan, which are based on the type of awards that are granted. The maximum number

23

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

of shares available for grant subject to full value awards (which generally include equity awards other than options and stock appreciation rights) was 1,308,576 shares as of June 30, 2011.

Summary of Nonvested Shares

A summary of our nonvested shares activity from January 1, 2011 through June 30, 2011 is presented below:

				Weighted-
				Average
				Grant Date
				Fair Value
Nonvested Shares	Shares			Per Share
Outstanding at January 1, 2011		50,032		$	58.40
Granted		68,727			37.83
Vested(1)		(9,474	)		56.76
Outstanding as of June 30, 2011		109,285		$	45.61

(1) The total shares vested include 2,198 shares that were then tendered to satisfy minimum statutory tax withholding requirements related to the restricted shares that have vested in accordance with the terms of the 2006 Plan. We accept the return of shares at the current quoted market price of the Company’s common stock to satisfy tax obligations.

A summary of our nonvested and vested shares activity for the six months ended June 30, 2011 and 2010 is presented below:

	Shares Granted				Shares Vested
			Weighted-Average
			Grant Date					Total Vest Date
	Non-Vested Shares		Fair Value					Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested Shares			(in thousands)
2011		68,727	$	37.83		(9,474	)	$	370
2010		3,239		30.88		(16,358	)		474

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

Summary of Restricted Stock Units

A summary of our restricted stock unit (“RSU”) activity from January 1, 2011 through June 30, 2011 is presented below:

	Nonvested RSUs
				Weighted-Average
				Grant Date
				Fair Value
	Amount			Per Share		Vested RSUs			Total RSUs
Outstanding at January 1, 2011		125,754		$	29.88		588,068			713,822
Granted		107,673			37.94		—			107,673
Vested		(23,035	)		30.57		23,035			—
Issuance of dividend equivalents(1)							13,494			13,494
Canceled(2)							(8,448	)		(8,448	)
Outstanding as of June 30, 2011		210,392		$	33.93		616,149			826,541

(1)	RSUs issued as dividend equivalents are vested upon issuance.
(2)	We accept the return of RSUs, at the current quoted market price of the Company’s common stock, to satisfy minimum statutory tax-withholding requirements related to either RSUs that have vested or RSU dividend equivalents in accordance with the terms of the 2006 Plan.

24

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

A summary of our RSU activity for the six months ended June 30, 2011 and 2010 is presented below:

	RSUs Granted				RSUs Vested
			Weighted-Average
			Grant Date				Total Vest-Date
	Non-Vested RSUs		Fair Value				Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested RSUs		(in thousands)
2011		107,673	$	37.94		23,035	$	897
2010		159,606		30.24		23,564		740

(1) Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $1.4 million and $2.2 million for the three months ended June 30, 2011 and 2010, respectively, and $2.8 million and $4.3 million for the six months ended June 30, 2011 and 2010, respectively. Of the total share-based compensation cost, $0.3 million was capitalized as part of real estate assets for the three months ended June 30, 2011 and 2010, and $0.6 million and $0.7 million was capitalized as part of real estate assets for the six months ended June 30, 2011 and 2010, respectively. As of June 30, 2011, there was approximately $7.1 million of total unrecognized compensation cost related to nonvested incentive awards granted under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 1.6 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to June 30, 2011.

10.   Future Minimum Rent

We have operating leases with tenants that expire at various dates through 2027 and are either subject to scheduled fixed increases or adjustments in rent based on the Consumer Price Index. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases as of June 30, 2011 for future periods is summarized as follows:

Year Ending	(in thousands)
Remaining 2011	$	153,705
2012		313,019
2013		293,621
2014		263,342
2015		210,150
Thereafter		658,754
Total	$	1,892,591

11.   Commitments and Contingencies

Ground Leases

We have noncancellable ground lease obligations at one building in Bellevue, Washington which expires in November 2093 and at Kilroy Airport Center Phases I, II, and III in Long Beach, California which expires in July 2084.

25

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The minimum commitment under our ground leases as of June 30, 2011 for five years and thereafter was as follows:

Year Ending	(in thousands)
Remaining 2011	$	1,041
2012		1,926
2013		1,926
2014		1,870
2015		1,830
Thereafter(1)(2)		133,212
Total	$	141,805

(1)

One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of June 30, 2011.

(2)

One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. Currently gross income does not exceed the threshold requiring us to pay percentage rent. The contractual obligations for that ground lease included above assumes the annual lease rental obligation in effect as of June 30, 2011.

Non-refundable Escrow Deposits

As of June 30, 2011, we had $16.0 million in non-refundable escrow deposits related to potential future acquisitions. These potential future acquisitions are currently anticipated to close in 2011 and are subject to customary closing conditions.

12.   Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets and liabilities we record at fair value in our consolidated financial statements are the marketable securities and related deferred compensation plan liability, both of which are related to our Deferred Compensation Plan. The following table sets forth the fair value of our marketable securities and related deferred compensation plan liability as of June 30, 2011 and December 31, 2010:

	Fair Value (Level 1)(1)
Description	June 30, 2011		December 31, 2010
	(in thousands)
Marketable securities(2)	$	5,654	$	4,902
Deferred compensation plan liability(3)	$	5,560	$	4,809

(1)	Based on quoted prices in active markets for identical securities.
(2)	The marketable securities are held in a limited rabbi trust.
(3)	The deferred compensation liability is reported on our consolidated balance sheets in accounts payable, accrued expenses, and other liabilities.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment gains (losses) in the consolidated statements of operations. We adjust the deferred compensation plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to

26

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

compensation cost for the period. The following table sets forth the related amounts recorded during the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
Description	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
	(in thousands)
Other net investments gains (losses)	$	26		$	(322	)	$	213		$	(121	)
Compensation cost		(26	)		359			(213	)		158

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of June 30, 2011 and December 31, 2010:

	June 30, 2011				December 31, 2010
	Carrying		Fair		Carrying		Fair
Description	Value		Value		Value		Value
	(in thousands)
Liabilities
Secured debt	$	475,820	$	493,185	$	313,009	$	329,456
Exchangeable notes		303,374		324,322		299,964		312,598
Unsecured senior notes		655,929		705,220		655,803		661,644
Credit Facility		245,000		244,757		159,000		159,659

27

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

13.   Segment Disclosure

We have one reportable segment which is our Office Properties segment and we have one non-reportable segment which is our Industrial Properties segment. We also have certain corporate level activities including legal administration, accounting, finance, management information systems, and acquisitions, which are not considered separate operating segments.

We evaluate the performance of our segments based upon Net Operating Income. “Net Operating Income” is defined as operating revenues (rental income, tenant reimbursements, and other property income) less property and related expenses (property expenses, real estate taxes, ground leases, and provisions for bad debts) and excludes other non-property related income and expenses such as interest income and interest expense, depreciation and amortization, acquisition-related expenses and corporate general and administrative expenses. There is no intersegment activity.

The following tables reconcile our reportable segment activity to our consolidated net income for the three and six months ended June 30, 2011 and 2010 and the assets by segment to the to consolidated assets as of June 30, 2011 and December 31, 2010.

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
				(in thousands)
Reportable Segment—Office Properties
Operating revenues(1)	$	84,560		$	64,718		$	165,379		$	124,321
Property and related expenses		24,729			19,503			47,639			35,757
Net Operating Income		59,831			45,215			117,740			88,564
Non-Reportable Segment—Industrial Properties
Operating revenues(1)		7,504			7,698			14,810			14,914
Property and related expenses		1,811			1,880			5,124			3,650
Net Operating Income		5,693			5,818			9,686			11,264
Total Segments:
Operating revenues(1)		92,064			72,416			180,189			139,235
Property and related expenses		26,540			21,383			52,763			39,407
Net Operating Income	$	65,524		$	51,033		$	127,426		$	99,828
Reconciliation to Consolidated Net Income:
Total Net Operating Income for segments	$	65,524		$	51,033		$	127,426		$	99,828
Unallocated (expenses) income:
General and administrative expenses		(7,440	)		(6,728	)		(14,000	)		(13,823	)
Acquisition-related expenses		(1,194	)		(957	)		(1,666	)		(1,270	)
Depreciation and amortization		(32,248	)		(23,722	)		(61,559	)		(44,660	)
Interest income and other net investment gains (losses)		58			(18	)		242			366
Interest expense		(21,228	)		(13,088	)		(42,104	)		(25,044	)
Loss on early extinguishment of debt		—			(4,564	)		—			(4,564	)
Net income	$	3,472		$	1,956		$	8,339		$	10,833

(1) All operating revenues are comprised of amounts received from third-party tenants.

28

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

	June 30, 2011		December 31, 2010
	(in thousands)
Assets:
Reportable Segment — Office Properties
Land, buildings, and improvements, net	$	2,481,829	$	2,108,019
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,027,731		2,611,206
Non-Reportable Segment — Industrial Properties
Land, buildings, and improvements, net		146,155		146,058
Total assets(1)		160,172		159,612
Total Segments
Land, buildings, and improvements, net		2,627,984		2,254,077
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,187,903		2,770,818
Reconciliation to Consolidated Assets:
Total assets allocated to segments	$	3,187,903	$	2,770,818
Other unallocated assets:
Cash and cash equivalents		25,412		14,840
Restricted cash		1,349		1,461
Marketable securities		5,654		4,902
Deferred financing costs, net		18,910		16,447
Prepaid expenses and other assets, net		25,559		8,097
Total consolidated assets	$	3,264,787	$	2,816,565

(1) Includes land, buildings, and improvements, undeveloped land and construction in progress, current receivables, deferred rent receivables deferred leasing costs, and acquisition-related intangible assets, all shown on a net basis.

29

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

14.   Net (Loss) Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net (loss) income available to common stockholders for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except share and per share amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	3,482		$	2,016		$	8,315		$	10,701
Preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common stockholders		(317	)		(1,783	)		717			3,103
Allocation to participating securities (nonvested shares and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common stockholders	$	(644	)	$	(2,088	)	$	68		$	2,499
Denominator:
Basic weighted average vested shares outstanding		57,685,710			50,296,643			55,008,765			46,674,494
Effect of dilutive securities- Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested shares and common share equivalents outstanding		57,685,710			50,296,643			55,384,729			46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

The effect of the 4.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three and six months ended June 30, 2010 and the effect of the 3.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three and six months ended June 30, 2011 and 2010. The average trading price of the Company’s common stock on the NYSE was below the Exchangeable Notes exchange price for these periods; therefore, these instruments were not considered to be in the money for the purposes of our diluted earnings per share calculation for these periods (See Note 5). Additionally, the effect of the assumed exchange of the 4.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three months ended June 30, 2011 as it was anti-dilutive as a result of the net loss available to common stockholders.

30

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

15.   Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net (loss) income available to common unitholders for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	3,440		$	1,905		$	8,274		$	10,737
Preferred distributions		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common unitholders		(359	)		(1,894	)		676			3,139
Allocation to participating securities (nonvested units and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common unitholders	$	(686	)	$	(2,199	)	$	27		$	2,535
Denominator:
Basic weighted average vested units outstanding		59,407,687			52,019,774			56,731,316			48,397,625
Effect of dilutive securities-Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested units and common unit equivalents outstanding		59,407,687			52,019,774			57,107,280			48,400,981
Basic earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

The effect of the 4.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three and six months ended June 30, 2010 and the effect of the 3.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three and six months ended June 30, 2011 and 2010. The average trading price of the Company’s common stock on the NYSE was below the Exchangeable Notes exchange price for these periods; therefore, these instruments were not considered to be in the money for the purposes of the Operating Partnership’s diluted earnings per unit calculation for these periods (See Note 5). Additionally, the effect of the assumed exchange of the 4.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three months ended June 30, 2011 as it was anti-dilutive as a result of the net loss available to common unitholders.

16.   Subsequent Events

On July 15, 2011, aggregate dividends, distributions, and dividend equivalents of $21.4 million were paid to common stockholders and common unitholders of record on June 30, 2011 and RSU holders of record on July 15, 2011.

In July 2011, the Operating Partnership issued unsecured senior notes in a public offering with an aggregate principal balance of $325.0 million that are scheduled to mature in July 2018. The unsecured senior notes require

31

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

semi-annual interest payments each January and July based on a stated annual interest rate of 4.80%. The Company used the net proceeds from this offering for general corporate purposes, including the repayment of borrowings under the Credit Facility.

In July 2011, the Company commenced a “continuous equity” offering program under which it may sell up to an aggregate of $200 million of its common stock from time to time in one or more “at the market” offerings. The Company may sell common stock under this program in amounts and at times to be determined by the Company and the Company has no obligation to sell common stock under this program.

17.   Pro Forma Results of the Company

The following pro forma consolidated results of operations of the Company for the three and six months ended June 30, 2011 and 2010 assumes that the acquisition of 601 108th Avenue N.E., Bellevue, WA, was completed as of January 1, 2010. Pro forma data may not be indicative of the results that would have been reported had the acquisition actually occurred as of January 1, 2010, nor does it intend to be a projection of future results.

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common stockholders(2)(3)	$	(585	)	$	(1,544	)	$	(645	)	$	3,876
Net (loss) income available to common stockholders per share—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common stockholders per share—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

The following table summarizes the results of operations for the property at 601 108th Avenue N.E., Bellevue, WA, from June 3, 2011, the date of acquisition, through June 30, 2011:

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

32

KILROY REALTY CORPORATION AND KILROY REALTY, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

18.   Pro Forma Results of the Operating Partnership

The following pro forma consolidated results of operations of the Operating Partnership for the three and six months ended June 30, 2011 and 2010 assumes that the acquisition of 601 108th Avenue N.E., Bellevue, WA, was completed as of January 1, 2010. Pro forma data may not be indicative of the results that would have been reported had the acquisition actually occurred as of January 1, 2010, nor does it intend to be a projection of future results.

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common unitholders(2)(3)	$	(632	)	$	(1,650	)	$	(713	)	$	3,932
Net (loss) income available to common unitholders per unit—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common unitholders per unit—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

The following table summarizes the results of operations for the property at 601 108th Avenue N.E., Bellevue, WA, from June 3, 2011, the date of acquisition, through June 30, 2011:

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

33

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

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

Statements contained in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations” that are not historical facts may be forward-looking statements. Such statements are subject to certain risks and uncertainties, which could cause actual results to differ materially from those projected. Some of the information presented is forward-looking in nature, including information concerning projected future occupancy rates, rental rate increases, property development and redevelopment timing and costs, and investment amounts. Numerous factors could affect our actual results, some of which are beyond our control. These include the breadth and duration of the current slowness of economic growth and its impact on our tenants, the strength of commercial and industrial real estate markets, market conditions affecting tenants, our ability to complete and successfully integrate pending and recent acquisitions, competitive market conditions, interest rate levels, volatility in the trading prices of the Company’s securities, and capital market conditions. You are cautioned not to place undue reliance on this information, which speaks only as of the date of this report. We assume no obligation to update publicly any forward-looking information, whether as a result of new information, future events, or otherwise, except to the extent we are required to do so in connection with our ongoing requirements under federal securities laws to disclose material information. For a discussion of important risks related to our business, and related to investing in our securities, including risks that could cause actual results and events to differ materially from results and events referred to in the forward-looking information, see “Item 1A: Risk Factors” in the Company’s and the Operating Partnership’s annual report on Form 10-K for the year ended December 31, 2010, and the discussion below under the captions “—Factors That May Influence Future Results of Operations,” “—Liquidity and Capital Resources of the Company,” and “—Liquidity and Capital Resources of the Operating Partnership”. In light of these risks, uncertainties, and assumptions, the forward-looking events discussed in this report might not occur.

Overview and Background

We are a self-administered REIT active in office and industrial submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A real estate properties in the coastal regions of Los Angeles, Orange County, San Diego, greater Seattle and the San Francisco Bay Area, which we believe have strategic advantages and strong barriers to entry. We own our interests in all of our properties through the Operating Partnership and the Finance Partnership, and conduct substantially all of our operations through the Operating Partnership. We owned a 97.1%, 96.8%, and 96.7% general partnership interest in the Operating Partnership as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. All our properties are held in fee except for the seven office buildings located at Kilroy Airport Center in Long Beach, California which are held subject to leases for the land that expire in 2084 and one office building located in Bellevue, Washington which is held subject to a lease for the land that expires in 2093.

Factors That May Influence Future Results of Operations

Acquisitions.  During the six months ended June 30, 2011, we acquired eight office buildings in five transactions for approximately $413.0 million (see Note 2 to our consolidated financial statements included in this report for more information), and during 2010 we acquired ten office buildings in eight transactions for approximately $697.8 million. We generally finance our acquisitions through debt and equity offerings and borrowings under our unsecured line of credit.

As a key component of our growth strategy, we continually evaluate property acquisition opportunities as they arise. As a result, at any point in time we may have one or more potential acquisitions under consideration that are in varying stages of evaluation, negotiation or due diligence review, including potential acquisitions under contract. Although, as of the date of this report we are a party to agreements to acquire properties, and in the future may enter into additional agreements to acquire properties, those agreements are and will be subject to the satisfaction of

34

closing conditions. We cannot provide assurance that we will enter into any additional agreements to acquire properties or that the acquisitions contemplated by the agreements to which we were a party as of the date of this report or any additional agreements we may enter into in the future will be completed. Costs associated with acquisitions are expensed as incurred and we may be unable to complete an acquisition after making a nonrefundable deposit or incurring acquisition-related costs. In addition, acquisitions are subject to various other risks and uncertainties. During the three and six months ended June 30, 2011, we incurred approximately $1.2 million and $1.7 million, respectively, of third-party acquisition costs and we anticipate that we will incur additional third-party acquisition costs throughout 2011 as we pursue other potential acquisitions.

Leasing Activity and Changes in Rental Rates.  The amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space, newly developed or redeveloped properties, newly acquired properties with vacant space, and space available from unscheduled lease terminations. The amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets. Negative trends in one or more of these factors could adversely affect our rental income in future periods. The following tables set forth certain information regarding leases that commenced during the three and six months ended June 30, 2011.

Lease Commencement Information
For Leases That Commenced During the Three Months Ended June 30, 2011

									2nd Generation(1)
	1st & 2nd Generation(1)																	Weighted
	Number of				Rentable							Changes						Average
	Leases(2)				Square Feet(2)				Changes in			in Cash			Retention			Lease Term
	New		Renewal		New		Renewal		Rents(3)			Rents(4)			Rates(5)			(in months)
Office Properties		22		7		199,540		45,373		1.1	%		(6.6	)%		11.6	%		47
Industrial Properties		3		1		60,481		54,795		(23.8	)%		(31.7	)%		100.0	%		81
Total portfolio		25		8		260,021		100,168		(4.2	)%		(11.8	)%		22.4	%		64

Lease Commencement Information
For Leases That Commenced During the Six Months Ended June 30, 2011

									2nd Generation(1)
	1st & 2nd Generation(1)																	Weighted
	Number of				Rentable							Changes						Average
	Leases(2)				Square Feet(2)				Changes in			in Cash			Retention			Lease Term
	New		Renewal		New		Renewal		Rents(3)			Rents(4)			Rates(5)			(in months)
Office Properties		37		17		367,449		119,329		(12.0	)%		(17.1	)%		23.6	%		55
Industrial Properties		5		2		145,270		91,766		(17.4	)%		(23.6	)%		93.9	%		84
Total portfolio		42		19		512,719		211,095		(12.7	)%		(17.9	)%		35.0	%		68

(1)	First generation leasing includes space where we have made capital expenditures that result in additional revenue generated when the space is re-leased. Second generation leasing includes space where we have made capital expenditures to maintain the current market revenue stream.
(2)	Represents leasing activity for leases that commenced during the period, including first and second generation space, net of month-to-month leases. Excludes development and redevelopment leasing.
(3)	Calculated as the change between GAAP rents for new/renewed leases and the expiring GAAP rents for the same space. Excludes leases for which the space was vacant longer than one year, or vacant when the property was acquired.
(4)	Calculated as the change between stated rents for new/renewed leases and the expiring stated rents for the same space. Excludes leases for which the space was vacant longer than one year, or vacant when the property was acquired.
(5)	Calculated as the percentage of space either renewed or expanded into by existing tenants or subtenants at lease expiration.

The changes in rents and changes in cash rents reported above exclude leases of approximately 229,900 and 376,300 rentable square feet for the three and six months ended June 30, 2011, for which the space was vacant longer than one year or we are leasing the space for the first time. We exclude space vacant for more than one year in our change in rents calculations to provide a meaningful market comparison. Retention rates for the three and six

35

months ended June 30, 2011 reflects 205,000 rentable square feet that was vacated by a single tenant upon lease expiration.

During the second quarter of 2011, we executed 39 leases for an aggregate of approximately 359,000 rentable square feet. The weighted average change in rents as compared to the expiring rents for the same space for these new leases was a 0.3% increase in GAAP rents and a 6.8% decrease in cash rents, excluding leases for which the space was vacant longer than one year. As of June 30, 2011, we believe that the weighted average cash rental rates for our overall portfolio, including recently acquired properties, are approximately 10% above the current average market rental rates, although individual properties within any particular submarket presently may be leased either above, below, or at the current market rates within that submarket, and the average rental rates for individual submarkets may be above, below, or at the average cash rental rate of our portfolio.

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

Scheduled Lease Expirations.  The following table sets forth certain information regarding our lease expirations for the remainder of 2011 and the next five years.

Lease Expirations⁽¹⁾

										Percentage of
			Net Rentable		Percentage of					Annualized			Average Annualized
			Area		Leased			Annualized Base		Base Rental			Base Rental
			Subject		Square Feet			Rental Revenue		Revenue			Revenue Per
	Number of		to Expiring		Represented by			Under		Represented			Square Foot Under
	Expiring		Leases		Expiring			Expiring Leases		by Expiring			Expiring Leases
Year of Lease Expiration	Leases		(Sq. Ft.)		Leases			(000’s)(2)		Leases(2)			(000’s)(2)
Office Properties:
Remainder of 2011		21		131,454		1.0	%	$	3,355		1.0	%	$	25.52
2012		83		847,738		6.3	%		23,085		7.0	%		27.23
2013		84		1,085,761		8.1	%		30,575		9.3	%		28.16
2014		78		1,331,446		9.9	%		35,427		10.8	%		26.61
2015		112		1,901,249		14.2	%		58,942		17.9	%		31.00
2016		48		584,546		4.4	%		14,500		4.4	%		24.81
Total Office		426		5,882,194		43.9	%		165,884		50.4	%	$	28.20
Industrial Properties:
Remainder of 2011		1		78,605		0.6	%		733		0.2	%	$	9.33
2012		11		452,557		3.4	%		2,647		0.8	%		5.85
2013		9		628,386		4.7	%		4,671		1.4	%		7.43
2014		17		568,386		4.2	%		4,528		1.4	%		7.97
2015		10		544,864		4.1	%		3,839		1.2	%		7.05
2016		5		317,198		2.4	%		3,695		1.1	%		11.65
Total Industrial		53		2,589,996		19.4	%		20,113		6.1	%	$	7.77
Total		479		8,472,190		63.3	%	$	185,997		56.5	%	$	21.95

(1)

The information presented reflects leasing activity through June 30, 2011. For leases that have been renewed early or space that has been re-leased to a new tenant, the expiration date and annualized base rent information presented takes into consideration the renewed or re-leased lease terms. Excludes space leased under month-to-month leases and vacant space as of June 30, 2011.

(2)

Reflects annualized contractual base rent calculated on a straight-line basis in accordance with GAAP excluding the amortization of deferred revenue related to tenant-funded tenant improvements and expense reimbursement revenue. Additionally, the underlying leases contain various expense structures including full service gross, modified gross and triple net. Amounts represent percentage of total portfolio annualized contractual base rental revenue.

36

In addition to the 1.5 million rentable square feet, or 9.8%, of currently available space in our stabilized portfolio, leases representing approximately 1.6% and 9.7% of the occupied square footage of our stabilized portfolio are scheduled to expire during the remainder of 2011 and in 2012, respectively. The leases scheduled to expire during the remainder of 2011 and in 2012 represent approximately 1.0 million rentable square feet of office space, or 8.0% of our total annualized base rental revenue, and 0.5 million rentable square feet of industrial space, or 1.0% of our total annualized base rental revenue, respectively. We believe that the weighted average cash rental rates are approximately 10% to 15% above the current average quoted market rates for leases scheduled to expire during the remainder of 2011 and 2012, although individual properties within any particular submarket presently may be leased either above, below, or at the current quoted market rates within that submarket, and the average rental rates for individual submarkets may be above, below, or at the average cash rental rate of our overall portfolio. Our ability to re-lease available space depends upon both general market conditions and the market conditions in the specific regions in which individual properties are located.

Development and Redevelopment Programs.  We believe that a portion of our long-term future potential growth will continue to come from our development pipeline and redevelopment opportunities within our existing portfolio. Redevelopment opportunities are those projects in which we spend significant development and construction costs on existing buildings pursuant to a formal plan, the intended result of which is a higher economic return on the property. In recent periods we have delayed the timing and reduced the scope of our development program, which impacts the average development and redevelopment asset balances qualifying for interest and other carry cost capitalization. During the second quarter of 2011, we did not capitalize interest on seven of our eight development pipeline properties with an aggregate cost basis of approximately $157.7 million, as it was determined these projects did not qualify for interest and other carry cost capitalization under GAAP. As of June 30, 2011, our development pipeline included 117.8 gross acres of land with an aggregate cost basis of approximately $274.9 million. While in recent periods we have delayed the timing and reduced the scope of our development program activity as a result of economic conditions in our submarkets, we continue to proactively evaluate development and redevelopment opportunities throughout the West Coast.

In the third quarter of 2010 we commenced the redevelopment of one of our buildings in the El Segundo submarket of Los Angeles County which encompasses approximately 300,000 rentable square feet. We are currently upgrading and modernizing the building and adjacent common areas since it was previously occupied by the Boeing Company and its predecessors for more than 25 years. The redevelopment project has a total estimated investment of approximately $52.4 million and is currently expected to be completed in the third quarter of 2011.

At June 30, 2011, we had one office property in the Long Beach submarket of Los Angeles encompassing approximately 98,000 rentable square feet which we removed from the stabilized portfolio since it was committed for redevelopment. We are currently upgrading and modernizing the building and adjacent common areas since the property was occupied by a single tenant for approximately 20 years. The redevelopment will occur in two phases and the existing tenant will occupy approximately 50% of the property during redevelopment. The redevelopment project has a total estimated investment of approximately $19.4 million and construction is currently expected to be completed in the second quarter of 2012.

We also plan to continue to evaluate redevelopment opportunities for certain other of our properties, which have been occupied by long-term tenants and require significant capital expenditures to upgrade and modernize the buildings. In addition, we plan to continue to focus on enhancing the entitlements for our existing development land pipeline, and performing additional activities to prepare for the time when development will again be economically attractive.

Incentive Compensation.  Our Executive Compensation Committee determines compensation, including equity and cash incentive programs, for our executive officers. The programs approved by the Executive Compensation Committee have historically provided for equity and cash compensation to be earned by our executive officers based on certain performance measures, including financial, operating, and development targets. Incentive compensation for our executive officers for 2011 has been structured to allow the Executive Compensation Committee to evaluate a variety of key factors and metrics at the end of the year and make a determination of incentive compensation for executive officers based on the Company and management’s overall performance. As a result, accrued incentive compensation and compensation expense for future incentive

37

compensation awards will be affected by our operating and development performance, financial results, the performance of the trading price of the Company’s common stock, and market conditions. Consequently, we cannot predict the amounts that will be recorded in future periods related to such incentive compensation.

Share-Based Compensation.  As of June 30, 2011, there was $7.1 million of total unrecognized compensation cost related to outstanding nonvested shares of restricted common stock and nonvested RSUs issued under share-based compensation arrangements. That cost is expected to be recognized over a weighted-average period of 1.6 years. The $7.1 million of unrecognized compensation cost does not reflect the future compensation cost for any potential share-based awards that may be issued based on the Company’s and management’s performance in 2011. Share-based compensation expense for future incentive compensation awards will be affected by our operating and development performance, financial results, the performance of the trading price of the Company’s common stock, and market conditions. Consequently, we cannot predict the amounts that will be recorded in future periods for such share-based awards. See Note 9 to our consolidated financial statements included in this report for additional information regarding our share-based incentive compensation plan.

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Stabilized Portfolio Information

The following table reconciles the changes in the rentable square feet in our stabilized portfolio of operating properties from June 30, 2010 to June 30, 2011:

	Office Properties						Industrial Properties						Total
	Number of			Rentable			Number of			Rentable			Number of			Rentable
	Buildings			Square Feet			Buildings			Square Feet			Buildings			Square Feet
Total as of June 30, 2010		100			10,088,803			41			3,654,463			141			13,743,266
Acquisitions		11			1,852,726									11			1,852,726
Properties moved to the redevelopment portfolio		(2	)		(384,394	)								(2	)		(384,394	)
Dispositions		(2	)		(106,791	)		(1	)		(51,567	)		(3	)		(158,358	)
Remeasurement					15,477						2,511			—			17,988
Total as of June 30, 2011		107			11,465,821			40			3,605,407			147			15,071,228

Occupancy Information

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

Stabilized Portfolio Occupancy

	Number of		Square Feet		Occupancy at(1)
Region	Buildings		Total		6/30/2011			3/31/2011			12/31/2010
Office Properties:
Los Angeles and Ventura Counties		28		2,976,006		82.9	%		90.7	%		89.3	%
San Diego		64		5,640,608		88.4			87.8			86.4
Orange County		5		540,656		92.5			93.9			93.1
San Francisco Bay Area		4		1,418,054		93.1			87.0			84.3
Greater Seattle		6		890,497		90.4			100.0			100.0
		107		11,465,821		87.9			89.0			87.5
Industrial Properties:
Los Angeles County		1		192,053		100.0			100.0			100.0
Orange County		39		3,413,354		97.4			95.6			93.5
		40		3,605,407		97.6			95.9			93.9
Total Stabilized Portfolio		147		15,071,228		90.2	%		90.8	%		89.1	%

	Average Occupancy for
	Three Months Ended
	June 30,
	Stabilized						Core
	Portfolio(1)						Portfolio(2)
	2011			2010			2011			2010
Office Properties		88.1	%		84.6	%		87.4	%		84.5	%
Industrial Properties		97.0	%		85.0	%		97.0	%		84.7	%
Total Portfolio		90.2	%		84.7	%		90.3	%		84.6	%

	Average Occupancy for
	Six Months Ended
	June 30,
	Stabilized
	Portfolio(1)						Core Portfolio(2)
	2011			2010			2011			2010
Office Properties		88.4	%		82.8	%		88.2	%		82.9	%
Industrial Properties		95.7	%		85.1	%		95.7	%		84.9	%
Total Portfolio		90.2	%		83.5	%		90.5	%		83.5	%

(1)	Occupancy percentages reported are based on our stabilized portfolio as of the end of the period presented.
(2)	Occupancy percentages reported are based on Office Properties and Industrial Properties owned and stabilized as of January 1, 2010 and still owned and stabilized as of June 30, 2011.

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As of June 30, 2011, the Office Properties and Industrial Properties represented approximately 92.1% and 7.9%, respectively, of our total annualized base rental revenue. During the three months ended June 30, 2011, the Office and Industrial Properties represented approximately 91.3% and 8.7%, respectively, of our total Net Operating Income, as defined. During the six months ended June 30, 2011, the Office Properties and Industrial Properties represented approximately 92.4% and 7.6%, respectively, of our total Net Operating Income, as defined.

Current Regional Information

Although real estate fundamentals continue to be challenging in many of our regional submarkets, we have started to see a general increase in occupancy across our portfolio, and we have generally seen a modest decrease in vacancy rates across many of our regional submarkets as well as a stabilization in rental rates and lease concession packages.

Los Angeles and Ventura Counties.  Our Los Angeles and Ventura Counties stabilized office portfolio of 3.0 million rentable square feet was 82.9% occupied with approximately 508,200 available rentable square feet as of June 30, 2011 compared to 89.3% occupied with approximately 328,800 available rentable square feet as of December 31, 2010. The decrease in occupancy is primarily attributable to 205,000 of rentable square feet related to a lease with one tenant in buildings along the 101-Corridor in Ventura County. The tenant vacated the properties upon expiration of the lease.

As of June 30, 2011, an aggregate of approximately 114,700 and 175,100 rentable square feet are scheduled to expire in this region during the remainder of 2011 and in 2012, respectively. The aggregate rentable square feet scheduled to expire in this region during the remainder of 2011 and in 2012 represents approximately 2.2% of our occupied rentable square feet and 2.5% of our annualized base rental revenues in our total stabilized portfolio. As of June 30, 2011, we have leased approximately 87,300 rentable square feet in this region that was vacant at June 30, 2011. The new leases are scheduled to commence during the remainder of 2011.

San Diego County.  Our San Diego County stabilized office portfolio of 5.6 million rentable square feet was 88.4% occupied with approximately 655,300 available rentable square feet as of June 30, 2011 compared to 86.4% occupied with approximately 744,300 available rentable square feet as of December 31, 2010. As of June 30, 2011, we have leased approximately 144,800 rentable square feet in this region that was available at June 30, 2011. The new leases are scheduled to commence during the remainder of 2011.

As of June 30, 2011, leases representing an aggregate of approximately 9,200 and 475,700 rentable square feet are scheduled to expire during the remainder of 2011 and in 2012, respectively, in this region. The aggregate rentable square feet scheduled to expire in this region during the remainder of 2011 and in 2012 represents approximately 3.6% of our occupied rentable square feet and 3.9% of our annualized base rental revenues in our total stabilized portfolio.

Orange County.  As of June 30, 2011, our Orange County stabilized industrial portfolio was 97.4% occupied with approximately 88,300 available rentable square feet compared to 93.5% occupied with approximately 220,100 available rentable square feet as of December 31, 2010. The increase in occupancy is primarily attributable to two leases with a total of approximately 123,300 rentable square feet that commenced during the first half of 2011.

Our Orange County stabilized office portfolio of approximately 540,700 rentable square feet was 92.5% occupied with approximately 40,300 available rentable square feet as of June 30, 2011 compared to 93.1% occupied with approximately 37,300 available rentable square feet as of December 31, 2010.

As of June 30, 2011, leases representing an aggregate of approximately 83,100 and 513,000 rentable square feet are scheduled to expire during the remainder of 2011 and in 2012, respectively, in this region. The aggregate rentable square feet scheduled to expire during the remainder of 2011 and in 2012 represents approximately 4.4% of our occupied rentable square feet and 1.5% of our annualized base rental revenues in our total stabilized portfolio. Of the 596,100 rentable square feet scheduled to expire during the remainder of 2011 and in 2012, approximately 531,200 rentable square feet is industrial space. As of June 30, 2011, we have leased approximately 73,500 rentable square feet of the 128,600 rentable square feet that was available in this region as of June 30, 2011. The new leases are expected to commence during the remainder of 2011.

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San Francisco Bay Area.  As of June 30, 2011, our San Francisco Bay Area stabilized office portfolio was 93.1% occupied with approximately 97,500 available rentable square feet as of June 30, 2011 compared to 84.3% occupied with approximately 188,900 available rentable square feet as of December 31, 2010. The increase in occupancy is primarily attributable to one lease encompassing approximately 83,700 of rentable square feet that commenced in the second quarter of 2011.

No leases are scheduled to expire during the remainder of 2011 and leases representing an aggregate of approximately 83,800 rentable square feet are scheduled to expire in 2012. The aggregate rentable square feet scheduled to expire in this region during 2012 represents approximately 0.6% of our occupied rentable square feet and 0.8% of our annualized base rental revenues in our total stabilized portfolio. As of June 30, 2011, we have leased approximately 45,600 rentable square feet in this region that was available at June 30, 2011. The new leases are scheduled to commence during the third quarter of 2011.

Greater Seattle.  As of June 30, 2011, our Greater Seattle stabilized office portfolio was 90.4% occupied with approximately 85,500 available rentable square feet as of June 30, 2011 compared to 100.0% occupied as of December 31, 2010. The decrease in occupancy is primarily attributable to the acquisitions of five office buildings encompassing approximately 768,400 rentable square feet during the six months ended June 30, 2011. These five buildings were 88.9% occupied as of June 30, 2011.

As of June 30, 2011, leases representing an aggregate of approximately 3,100 and 52,600 rentable square feet are scheduled to expire during the remainder of 2011 and in 2012. The aggregate rentable square feet scheduled to expire in this region during the remainder of 2011 and in 2012 represents approximately 0.4% of our occupied rentable square feet and 0.4% of our annualized base rental revenues in our total stabilized portfolio.

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Results of Operations

Management internally evaluates the operating performance and financial results of our portfolio based on Net Operating Income for the consolidated portfolio. We define “Net Operating Income” as operating revenues (rental income, tenant reimbursements, and other property income) less operating expenses (property expenses, real estate taxes, provision for bad debts, and ground leases). The Net Operating Income information presented within this Management’s Discussion and Analysis of Financial Condition and Results of Operations is the same Net Operating Income information disclosed in our segment information in Note 13 to our consolidated financial statements.

Comparison of the Three Months Ended June 30, 2011 to the Three Months Ended June 30, 2010

The following table reconciles our Net Operating Income, as defined, to our net income for the three months ended June 30, 2011 and 2010.

	Three Months Ended June 30,						Dollar			Percentage
	2011			2010			Change			Change
	($ in thousands)
Net Operating Income, as defined	$	65,524		$	51,033		$	14,491			28.4	%
Unallocated (expense) income:
General and administrative expenses		(7,440	)		(6,728	)		(712	)		10.6
Acquisition-related expenses		(1,194	)		(957	)		(237	)		24.8
Depreciation and amortization		(32,248	)		(23,722	)		(8,526	)		35.9
Interest income and other net investment gains (losses)		58			(18	)		76			422.2
Interest expense		(21,228	)		(13,088	)		(8,140	)		62.2
Loss on early extinguishment of debt		—			(4,564	)		4,564			100.0
Net income	$	3,472		$	1,956		$	1,516			77.5	%

Rental Operations

The following tables summarize the Net Operating Income, as defined, for our total portfolio for the three months ended June 30, 2011 and 2010.

	2011									2010
	Core		Acquisitions					Total		Core			Acquisitions				Total
	Portfolio(1)		Portfolio(2)		Other			Portfolio		Portfolio(1)			Portfolio(2)		Other		Portfolio
	(in thousands)									(in thousands)
Operating revenues:
Rental income	$	62,182	$	20,908	$	362		$	83,452	$	59,929		$	3,252	$	1,857	$	65,038
Tenant reimbursements		5,779		1,697		34			7,510		5,855			64		564		6,483
Other property income		1,082		20		—			1,102		694			1		200		895
Total		69,043		22,625		396			92,064		66,478			3,317		2,621		72,416
Property and related expenses:
Property expenses		12,094		5,180		309			17,583		13,082			813		648		14,543
Real estate taxes		5,762		2,285		366			8,413		5,701			355		426		6,482
Provision for bad debts		120		—		—			120		(12	)		—		—		(12	)
Ground leases		330		60		34			424		334			—		36		370
Total		18,306		7,525		709			26,540		19,105			1,168		1,110		21,383
Net Operating Income, as defined	$	50,737	$	15,100	$	(313	)	$	65,524	$	47,373		$	2,149	$	1,511	$	51,033

(1)	Properties owned and stabilized as of January 1, 2010 and still owned and stabilized as of June 30, 2011.
(2)	Includes results, from the dates of acquisition through the periods presented, for the ten office buildings we acquired during 2010 and the eight office buildings we acquired during the first half of 2011.

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	Three Months Ended June 30, 2011
	As Compared to the Three Months Ended June 30, 2010
	Core Portfolio						Acquisitions Portfolio					Total Portfolio
	Dollar			Percentage			Dollar		Percentage			Dollar		Percentage
	Change			Change			Change		Change			Change		Change
	($ in thousands)
Operating revenues:
Rental income	$	2,253			3.8	%	$	17,656		542.9	%	$	18,414		28.3	%
Tenant reimbursements		(76	)		(1.3	)		1,633		2,551.6			1,027		15.8
Other property income		388			55.9			19		1,900.0			207		23.1
Total		2,565			3.9			19,308		582.1			19,648		27.1
Property and related expenses:
Property expenses		(988	)		(7.6	)		4,367		537.1			3,040		20.9
Real estate taxes		61			1.1			1,930		543.7			1,931		29.8
Provision for bad debts		132			1,100.0			—		—			132		1,100.0
Ground leases		(4	)		(1.2	)		60		100.0			54		14.6
Total		(799	)		(4.2	)		6,357		544.3			5,157		24.1
Net Operating Income, as defined	$	3,364			7.1	%	$	12,951		602.7	%	$	14,491		28.4	%

Net Operating Income increased $14.5 million, or 28.4%, for the three months ended June 30, 2011 as compared to the three months ended June 30, 2010 primarily resulting from:

•   An increase of $13.0 million attributable to the ten office buildings we acquired during 2010 and the eight office buildings we acquired during the first half of 2011 (the “Acquisitions Portfolio”) as presented in the tables above;

•   An increase of $3.4 million attributable to the properties owned and stabilized as of January 1, 2010 and still owned and stabilized as of June 30, 2011 (the “Core Portfolio”) primarily as a result of:

•   An increase in rental income of $2.3 million primarily resulting from an increase in average occupancy of 5.7%, from 84.6% for the three months ended June 30, 2010, to 90.3% for the three months ended June 30, 2011; and

•   A decrease in property expenses of $1.0 million primarily as a result of lower nonreimbursable legal fees and consulting costs; and

•   An offsetting decrease of $1.7 million generated by one office building that was moved from the stabilized portfolio to the redevelopment portfolio during the third quarter of 2010 upon the expiration of the lease for that building and one office building that was moved to the redevelopment portfolio during the second quarter of 2011 as it was committed for redevelopment (the “Redevelopment Properties”).

Other Expenses and Income

General and Administrative Expenses

General and administrative expenses increased $0.7 million, or 10.6%, for the three months ended June 30, 2011 compared to the three months ended June 30, 2010 primarily due to the growth of the company as a result of the ongoing acquisition activities.

Depreciation and Amortization

Depreciation and amortization increased by $8.5 million, or 35.9%, for the three months ended June 30, 2011 compared to the three months ended June 30, 2010, primarily related to the Acquisitions Portfolio.

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Interest Expense

The following table sets forth our gross interest expense, including debt discounts/premiums and loan cost amortization, net of capitalized interest for the three months ended June 30, 2011 and 2010:

							Dollar		Percentage
	2011			2010			Change		Change
	($ in thousands)
Gross interest expense	$	23,293		$	15,897		$	7,396		46.5	%
Capitalized interest		(2,065	)		(2,809	)		744		(26.5	)%
Interest expense	$	21,228		$	13,088		$	8,140		62.2	%

Gross interest expense, before the effect of capitalized interest, increased $7.4 million, or 46.5%, for the three months ended June 30, 2011 compared to the three months ended June 30, 2010 resulting from an increase in our average outstanding debt balances primarily as a result of our acquisition activity.

Capitalized interest decreased $0.7 million, or 26.5%, for the three months ended June 30, 2011 compared to the three months ended June 30, 2010 primarily as of a result of a decrease in our average development and redevelopment asset balances qualifying for interest capitalization.

Comparison of the Six Months Ended June 30, 2011 to the Six Months Ended June 30, 2010

The following table reconciles our Net Operating Income, as defined to our net income for the six months ended June 30, 2011 and 2010.

	Six Months Ended June 30,						Dollar			Percentage
	2011			2010			Change			Change
	($ in thousands)
Net Operating Income, as defined	$	127,426		$	99,828		$	27,598			27.6	%
Unallocated (expense) income:
General and administrative expenses		(14,000	)		(13,823	)		(177	)		1.3
Acquisition-related expenses		(1,666	)		(1,270	)		(396	)		31.2
Depreciation and amortization		(61,559	)		(44,660	)		(16,899	)		37.8
Interest income and other net investment gains		242			366			(124	)		(33.9	)
Interest expense		(42,104	)		(25,044	)		(17,060	)		68.1
Loss on early extinguishment of debt		—			(4,564	)		4,564			100.0
Net income	$	8,339		$	10,833		$	(2,494	)		(23.0	)%

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The following tables summarize the Net Operating Income, as defined, for our total portfolio for the six months ended June 30, 2011 and 2010.

	2011									2010
	Core		Acquisitions					Total		Core		Acquisitions					Total
	Portfolio(1)		Portfolio(2)		Other			Portfolio		Portfolio(1)		Portfolio(2)		Other			Portfolio
	(in thousands)									(in thousands)
Operating revenues:
Rental income	$	124,274	$	38,738	$	730		$	163,742	$	118,636	$	3,334	$	3,724		$	125,694
Tenant reimbursements		11,166		2,712		54			13,932		11,101		66		1,034			12,201
Other property income		2,440		44		31			2,515		1,139		1		200			1,340
Total		137,880		41,494		815			180,189		130,876		3,401		4,958			139,235
Property and related expenses:
Property expenses		25,122		9,531		619			35,272		24,464		850		1,249			26,563
Real estate taxes		11,579		4,272		731			16,582		11,299		367		852			12,518
Provision for bad debts		146		—		—			146		14		—		—			14
Ground leases		632		60		71			763		373		—		(61	)		312
Total		37,479		13,863		1,421			52,763		36,150		1,217		2,040			39,407
Net Operating Income, as defined	$	100,401	$	27,631	$	(606	)	$	127,426	$	94,726	$	2,184	$	2,918		$	99,828

(1)	Properties owned and stabilized as of January 1, 2010 and still owned and stabilized as of June 30, 2011.
(2)	Includes results, from the dates of acquisition through the periods presented, for the ten office buildings we acquired during 2010 and the eight office buildings we acquired during the first half of 2011.

The following table compares the Net Operating Income, as defined, for our total portfolio for the six months ended June 30, 2011 and 2010.

	Six Months Ended June 30, 2011 As Compared to the Six Months Ended June 30, 2010
	Core Portfolio					Acquisitions Portfolio					Total Portfolio
	Dollar		Percentage			Dollar		Percentage			Dollar		Percentage
	Change		Change			Change		Change			Change		Change
	($ in thousands)
Operating revenues:
Rental income	$	5,638		4.8	%	$	35,404		1,061.9	%	$	38,048		30.3	%
Tenant reimbursements		65		0.6			2,646		4,009.1			1,731		14.2
Other property income		1,301		114.2			43		4,300.0			1,175		87.7
Total		7,004		5.4			38,093		1,120.1			40,954		29.4
Property and related expenses:
Property expenses		658		2.7			8,681		1,021.3			8,709		32.8
Real estate taxes		280		2.5			3,905		1,064.0			4,064		32.5
Provision for bad debts		132		942.9			—		—			132		942.9
Ground leases		259		69.4			60		100.0			451		144.6
Total		1,329		3.7			12,646		1,039.1			13,356		33.9
Net Operating Income, as defined	$	5,675		6.0	%	$	25,447		1,165.2	%	$	27,598		27.6	%

Net Operating Income increased $27.6 million, or 27.6%, for the six months ended June 30, 2011 as compared to the six months ended June 30, 2010 primarily resulting from:

•   An increase of $25.4 million attributable to the Acquisitions Portfolio, as presented in the tables above;

•   An increase of $5.7 million attributable to the Core Portfolio primarily as a result of:

•   An increase in rental income of $5.6 million primarily resulting from an increase in average occupancy of 7.0%, from 83.5% for the six months ended June 30, 2010, to 90.5% for the six months ended June 30, 2011;

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•   An increase in other property income of $1.3 million. Other property income for both periods consisted primarily of lease termination fees and other miscellaneous income;

•   An offsetting increase in property expenses of $0.7 million primarily as a result of an increase in certain recurring operating costs such as property management expenses and janitorial and other service-related costs primarily as a result of an increase in average occupancy, as discussed above; and

•   An offsetting increase in ground leases of $0.3 million primarily as a result of a ground rent expense adjustment in 2010 for our Kilroy Airport Center, Long Beach project. We were successful in negotiating a lower rental rate under the terms of the ground lease retroactive to January 1, 2006 which resulted in a lower ground rent expense for the six months ended June 30, 2010; and

•   An offsetting decrease of $3.3 million attributable to the Redevelopment Properties.

Other Expenses and Income

Depreciation and Amortization

Depreciation and amortization increased by $16.9 million, or 37.8%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010, primarily related to the Acquisitions Portfolio.

Interest Expense

The following table sets forth our gross interest expense, including debt discounts/premiums and loan cost amortization, net of capitalized interest, for the six months ended June 30, 2011 and 2010:

							Dollar		Percentage
	2011			2010			Change		Change
	($ in thousands)
Gross interest expense	$	46,148		$	30,437		$	15,711		51.6	%
Capitalized interest		(4,044	)		(5,393	)		1,349		(25.0	)%
Interest expense	$	42,104		$	25,044		$	17,060		68.1	%

Gross interest expense, before the effect of capitalized interest, increased $15.7 million, or 51.6%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010 resulting from an increase in our average outstanding debt balances primarily as a result of our acquisition activity.

Capitalized interest decreased $1.3 million, or 25.0%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010 primarily attributable to a decrease in our average development and redevelopment asset balances qualifying for interest capitalization.

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Liquidity and Capital Resources of the Company

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

The Company’s business is operated primarily through the Operating Partnership. Distributions from the Operating Partnership are the Company’s source of capital. The Company believes the Operating Partnership’s sources of working capital, specifically its cash flow from operations and borrowings available under its Credit Facility, are adequate for it to make its distribution payments to the Company and, in turn, for the Company to make its dividend payments to its preferred and common shareholders. Cash flows from operating activities generated by the Operating Partnership for the three and six months ended June 30, 2011 were sufficient to cover the Company’s payment of cash dividends to its shareholders. However, there can be no assurance that the Operating Partnership’s sources of capital will continue to be available at all or in amounts sufficient to meet its needs, including its ability to make distributions to the Company. The unavailability of capital could adversely affect the Operating Partnership’s ability to make distributions to the Company, which would in turn, adversely affect the Company’s ability to pay cash dividends to its shareholders.

The Company is a well-known seasoned issuer with an effective shelf registration statement for the public issuance of preferred or common equity securities and guarantees of debt securities, and for the public issuance by the Operating Partnership of debt securities. As circumstances warrant, the Company may issue securities from time to time on an opportunistic basis, depending upon market conditions and available pricing. When the Company receives proceeds from preferred or common equity issuances, it is required by the Operating Partnership’s partnership agreement to contribute the proceeds from its equity issuances to the Operating Partnership in exchange for corresponding interest in preferred or common partnership units of the Operating Partnership. The Operating Partnership may use the proceeds to repay debt, including borrowings under its Credit Facility, develop new or existing properties, to make acquisitions of properties, portfolios of properties, or for general corporate purposes.

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

Distribution Requirements

The Company is required to distribute 90% of its taxable income (excluding capital gains) on an annual basis to maintain qualification as a REIT for federal income tax purposes, and is required to pay tax at regular corporate rates to the extent it distributes less than 100% of its taxable income (including capital gains). While historically the Company has satisfied its distribution requirement by making cash distributions to its shareholders, for distributions with respect to taxable years ending on or before December 31, 2011, IRS guidance allows the Company to satisfy up to 90% of this requirement through the distribution of shares of the Company’s common stock, if certain conditions are met. The Company intends to continue to make, but has not committed to make, regular quarterly cash distributions to common stockholders and common unitholders from cash flow from operating activities. All such distributions are at the discretion of the board of directors. The Company has historically distributed amounts in excess of our taxable income resulting in a return of capital to its stockholders and the Company currently believes it has the ability to maintain distributions at the 2010 levels to meet its REIT requirements for 2011. The Company considers market factors and its performance in addition to REIT requirements in determining our distribution levels. In addition, one of the covenants contained within the Credit Facility prohibits the Company from paying dividends in excess of 95% of Funds From Operations (“FFO”).

On May 24, 2011, the Board of Directors declared a regular quarterly cash dividend of $0.35 per common share and common unit payable on July 15, 2011 to common stockholders and common unitholders of record on

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June 30, 2011 and caused a $0.35 per Operating Partnership unit cash distribution to be paid in respect of the Operating Partnership’s common limited partnership interests, including those owned by the Company.

On May 24, 2011, the Board of Directors declared a dividend of $0.4875 per share on the Company’s Series E Preferred Stock and a dividend of $0.46875 per share on the Company’s Series F Preferred Stock for the period commencing on and including May 15, 2011 and ending on and including August 14, 2011. The Company is also required to make quarterly cash distributions to the 7.45% Series A Preferred unitholders of $0.7 million, payable on August 15, 2011.

Capitalization

As of June 30, 2011, our total debt as a percentage of total market capitalization was 39.6% and the total debt and liquidation value of our preferred equity as a percentage of total market capitalization was 44.3%, which was calculated based on the closing price per share of the Company’s common stock of $39.49 on June 30, 2011 as shown in the table below.

			Aggregate
			Principal
	Shares/Units		Amount or		% of Total
	at June 30,		$ Value		Market
	2011		Equivalent		Capitalization
	($ in thousands)
Debt:
Credit Facility			$	245,000		5.7	%
3.25% Exchangeable Notes due 2012(1)				148,000		3.5
4.25% Exchangeable Notes due 2014(1)				172,500		4.0
Unsecured Senior Notes due 2014				83,000		1.9
Unsecured Senior Notes due 2015(1)				325,000		7.6
Unsecured Senior Notes due 2020(1)				250,000		5.8
Secured debt(1)				475,291		11.1
Total debt(2)			$	1,698,791		39.6
Equity and Noncontrolling Interest:
7.450% Series A Cumulative Redeemable Preferred units(3)		1,500,000	$	75,000		1.8	%
7.800% Series E Cumulative Redeemable Preferred stock(4)		1,610,000		40,250		0.9
7.500% Series F Cumulative Redeemable Preferred stock(4)		3,450,000		86,250		2.0
Common units outstanding(5)(6)		1,718,131		67,849		1.6
Common shares outstanding(6)		58,464,412		2,308,760		54.1
Total equity and noncontrolling interests				2,578,109		60.4
Total Market Capitalization			$	4,276,900		100.0	%

(1)	Represents gross aggregate principal amount due at maturity, before the effect of the unamortized discounts and premiums as of June 30, 2011.
(2)	In July 2011, the Operating Partnership issued unsecured senior notes with an aggregate principal balance of $325.0 million that are scheduled to mature in July 2018. The unsecured senior notes require semi-annual interest payments each January and July based on a stated annual interest rate of 4.80%.
(3)	Value based on $50.00 per unit liquidation preference.
(4)	Value based on $25.00 per share liquidation preference.
(5)	Represents common units not owned by the Company.
(6)	Value based on closing price per share of our common stock of $39.49 as of June 30, 2011.

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Liquidity and Capital Resources of the Operating Partnership

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

General

Our primary liquidity sources and uses are as follows:

Liquidity Sources

•   Net cash flow from operations;

•   Borrowings under the Credit Facility;

•   Proceeds from additional secured or unsecured debt financings;

•   Proceeds from public or private issuance of debt or equity securities; and

•   Proceeds from the disposition of nonstrategic assets.

Liquidity Uses

•   Property or undeveloped land acquisitions;

•   Property operating and corporate expenses;

•   Capital expenditures, tenant improvement and leasing costs;

•   Debt service and principal payments, including debt maturities;

•   Distributions to common and preferred security holders;

•   Development and redevelopment costs; and

•   Outstanding debt repurchases.

General Strategy

Our general strategy is to maintain a conservative balance sheet with a top credit profile and to maintain a capital structure that allows for financial flexibility and diversification of capital resources. We manage our capital structure to reflect a long-term investment approach and utilize multiple sources of capital to meet our long-term capital requirements. We believe that our current projected liquidity requirements for the next twelve-month period, as set forth above under the caption “—Liquidity Uses,” will be satisfied using a combination of the liquidity sources listed above. We believe our conservative leverage and staggered debt maturities provide us with financial flexibility and enhances our ability to obtain additional sources of liquidity if necessary, and, therefore, we are well-positioned to refinance or repay maturing debt and to pursue our strategy of seeking attractive acquisition opportunities, which we may finance, as necessary, with future public and private issuances of debt and equity securities or dispositions of non-strategic assets.

2011 Financing Activities

•   In July 2011, we commenced a “continuous equity” offering program under which we may sell up to an aggregate of $200 million of the Company’s common stock from time to time in one or more “at the market” offerings. (See Liquidity Sources section for additional information).

•   In July 2011, the Operating Partnership issued $325.0 million in aggregate principal amount of 4.80% unsecured senior notes due 2018 (see Note 16 to our consolidated financial statements included in this report for additional information).

•   In June 2011, the Operating Partnership amended the terms of the Credit Facility to extend the maturity date to August 2015, reduce the interest rate to an annual rate of LIBOR plus 1.750% and reduce the

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facility fee to an annual rate of 0.35% (see Note 5 to our consolidated financial statements included in this report for additional information).

•   In April 2011, the Operating Partnership assumed secured debt with a principal balance of $30.0 million in conjunction with the acquisition of four office buildings in Kirkland, Washington (see Note 5 to our consolidated financial statements included in this report for additional information).

•   In April 2011, the Company completed an underwritten public offering of 6,037,500 shares of its common stock. The net offering proceeds, after deducting underwriting discounts and commissions and offering expenses, of approximately $221.0 million were contributed to the Operating Partnership (see Notes 7 and 8 to our consolidated financial statements included in this report for additional information).

•   In January 2011, the Operating Partnership borrowed $135.0 million under a mortgage loan. The mortgage loan is secured by one property in San Francisco, bears interest at an annual rate of 4.27%, requires interest-only payments for the first two years with a 30-year amortization schedule thereafter, and is scheduled to mature on February 1, 2018 (see Note 5 to our consolidated financial statements included in this report for additional information).

Liquidity Sources

Credit Facility

In June 2011, we amended the terms of our Credit Facility to extend the maturity date and reduce the interest rate and facility fee. The following table summarizes the terms of our Credit Facility as of December 31, 2010 and as amended as of June 30, 2011:

	June 30,			December 31,
	2011			2010
	(In thousands)
Outstanding borrowings	$	245,000		$	159,000
Remaining borrowing capacity		255,000			341,000
Total borrowing capacity(1)	$	500,000		$	500,000
Interest rate(2)		2.87	%		2.99	%
Facility fee—annual rate(3)		0.350	%		0.575	%
Maturity date(4)		August 2015			August 2013

(1)	We may elect to borrow, subject to lender approval, up to an additional $200 million under an accordion feature under the terms of the Credit Facility.
(2)	The Credit Facility interest rate included interest at an annual rate of LIBOR plus 1.750% and 2.675% as of June 30, 2011 and December 31, 2010, respectively.
(3)	The facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we also incurred debt origination and legal costs of approximately $5.0 million when we entered into the Credit Facility in 2010 and an additional $3.3 million when we amended the Credit Facility in 2011. The unamortized balance of these costs will be amortized as additional interest expense over the extended term of the Credit Facility.
(4)	Under the terms of the Credit Facility, we may exercise an option to extend the maturity date by one year.

At the Market Program

In July 2011, we commenced a periodic stock offering program under which we may sell up to $200 million aggregate gross sales price of the Company’s common stock from time to time. Sales of the shares, if any, made through our agents, as sales agents, under the program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange at market prices prevailing at the time of sale or negotiated transactions or as otherwise agreed by the Company and the applicable agent. Sales of shares, if any, may also be sold to any of the agents, as principal, at a price per share to be agreed upon at the time of sale. As of the date of this report, no shares have been sold under the program. Actual sales will depend upon a variety of factors including but not limited to market conditions, the trading price of the Company’s common stock, and our capital needs. We have no obligation to sell shares under this program.

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Possible Dispositions

As part of our ongoing capital recycling program, we are evaluating the possible disposition of office and industrial properties with an aggregate sales price of approximately $175 million to $200 million and we could potentially dispose of additional properties as part of our capital recycling program over the next 12 to 18 months, depending upon market conditions. However, we cannot provide assurance that we will consummate any of these possible dispositions or, if we do, that the amount of proceeds from those dispositions will not be less, perhaps substantially, than the foregoing amounts.

Exchangeable Notes, Unsecured Senior Notes, and Secured Debt

The aggregate principal amount of our Exchangeable Notes, unsecured senior notes, and secured debt of the Operating Partnership outstanding as of June 30, 2011 was as follows:

	Aggregate
	Principal
	Amount
	Outstanding
	(In thousands)
3.25% Exchangeable Notes due 2012(1)	$	148,000
4.25% Exchangeable Notes due 2014(1)		172,500
Unsecured Senior Notes due 2014		83,000
Unsecured Senior Notes due 2015(1)		325,000
Unsecured Senior Notes due 2020(1)		250,000
Secured Debt(1)		475,291
Total Exchangeable Notes, Unsecured Senior Notes, and Secured Debt(2)	$	1,453,791

(1)	Represents gross aggregate principal amount before the effect of the unamortized discounts and premiums as of June 30, 2011.
(2)	In July 2011, the Operating Partnership issued unsecured senior notes with an aggregate principal balance of $325.0 million that are scheduled to mature in July 2018. The unsecured senior notes    require semi-annual interest payments each January and July based on a contractual annual interest rate of 4.80%.

Debt Composition

The composition of the Operating Partnership’s aggregate debt balances between secured and unsecured and fixed-rate and variable-rate debt as of June 30, 2011 and December 31, 2010 was as follows:

	Percentage of Total Debt						Weighted Average Interest Rate
	June 30,			December 31,			June 30,			December 31,
	2011			2010			2011			2010
Secured vs. unsecured:
Unsecured(1)		72.0	%		78.4	%		4.7	%		4.8	%
Secured		28.0			21.6			5.4			6.0
Variable-rate vs. fixed-rate:
Variable-rate		14.4			11.0			2.9			2.9
Fixed-rate(1)		85.6			89.0			5.2			5.3
Stated interest rate(1)								4.9			5.1
Interest rate including loan costs(1)								5.4			5.7
GAAP effective rate(2)								5.9	%		6.3	%

(1)	Excludes the impact of the amortization of the noncash debt discounts related to the accounting required for our Exchangeable Notes.
(2)	Includes the impact of the amortization of the noncash debt discounts related to the accounting required for our Exchangeable Notes.

Liquidity Uses

Contractual Obligations

The following table provides information with respect to the Operating Partnership’s contractual obligations as of June 30, 2011. The table includes the changes in our contractual obligations as result of transactions that occurred during the six months ended June 30, 2011, including the debt and ground lease obligations assumed with property

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acquisitions (see Note 2 to our consolidated financial statements for more information) and the amendment of the Credit Facility which extended the maturity date by two years. The table: (i) indicates the maturities and scheduled principal repayments of our secured debt, Exchangeable Notes, unsecured senior notes, and Credit Facility; (ii) indicates the scheduled interest payments of our fixed-rate and variable-rate debt as of June 30, 2011; (iii) provides information about the minimum commitments due in connection with our ground lease obligations and other lease and contractual commitments; and (iv) provides estimated redevelopment commitments as of June 30, 2011. Note that the table does not reflect our available debt maturity extension options and reflects gross aggregate principal amounts before the effect of unamortized discounts/premiums.

	Payment Due by Period
	Less than
	1 Year						More than
	(Remainder		1-3 Years		3-5 Years		5 Years
	of 2011)		(2012-2013)		(2014-2015)		(After 2015)		Total
Principal payments—secured debt(1)	$	72,262	$	163,676	$	39,325	$	200,028	$	475,291
Principal payments—Exchangeable Notes(2)				148,000		172,500				320,500
Principal payments—unsecured senior notes(3)(4)						408,000		250,000		658,000
Principal payments—Credit Facility						245,000				245,000
Interest payments—fixed-rate debt(5)		38,381		121,555		96,959		92,961		349,856
Interest payments—variable-rate debt(6)		2,879		11,516		9,117				23,512
Ground lease obligations(7)		1,041		3,852		3,700		133,212		141,805
Lease and contractual commitments(8)		35,910		4,183		4,021				44,114
Redevelopment Commitments(9)		13,000								13,000
Total	$	163,473	$	452,782	$	978,622	$	676,201	$	2,271,078

(1)	Includes the $52.0 million gross aggregate principal amount of the loan due in April 2012 before the effect of the unamortized discount of approximately $0.4 million as of June 30, 2011. Also includes the $30.0 million gross aggregate principal amount of the loan due in April 2015 before the effect of the unamortized premium of approximately $0.9 million as of June 30, 2011.
(2)	Represents gross aggregate principal amount before the effect of the unamortized discount of approximately $17.1 million as of June 30, 2011.
(3)	Represents gross aggregate principal amount before the effect of the unamortized discount of approximately $2.1 million as of June 30, 2011.
(4)	In July 2011, we issued unsecured senior notes with an aggregate principal balance of $325.0 million that are scheduled to mature in July 2018. These senior notes are not included in the table presented above. The unsecured senior notes require semi-annual interest payments each January and July based on a stated annual interest rate of 4.80%.
(5)	As of June 30, 2011, 85.6% of our debt was contractually fixed. The information in the table above reflects our projected interest rate obligations for these fixed-rate payments based on the contractual interest rates, interest payment dates, and scheduled maturity dates.
(6)	As of June 30, 2011, 14.4% of our debt bore interest at variable rates. The variable interest rate payments are based on LIBOR plus a spread of 1.750% as of June 30, 2011. The information in the table above reflects our projected interest rate obligations for these variable-rate payments based on outstanding principal balances and the effective interest rates as of June 30, 2011, the scheduled interest payment dates, and the contractual maturity dates.
(7)	One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of June 30, 2011. Another one of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. Currently gross income does not exceed the threshold requiring us to pay percentage rent. The contractual obligations for that ground lease included above assumes the annual lease rental obligation in effect as of June 30, 2011.
(8)	Amounts represent commitments under signed leases and contracts for operating properties, excluding tenant-funded tenant improvements. The timing of these expenditures may fluctuate.
(9)	Amounts represent contractual commitments for redevelopment projects under construction at June 30, 2011. The timing of these expenditures may fluctuate based on the ultimate progress of construction.

Distribution Requirements

For a discussion of our dividend and distribution requirements, please see the Distribution Requirements discussion under Liquidity and Capital Resources of the Company.

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Other Potential Liquidity Uses

In 2010 we acquired ten properties for approximately $637.6 million in cash and to date in 2011 we have acquired eight properties for approximately $378.6 million in cash, all of which we funded through various capital raising activities. We continually evaluate property acquisition opportunities as they arise. As a result, at any point in time we may have one or more potential acquisitions under consideration that are in varying stages of evaluation, negotiation or due diligence review, including potential acquisitions under contract. We expect that any material acquisitions will be funded with borrowings under our Credit Facility, the public or private issuance of new debt or equity securities, or potentially through the disposition of assets under our capital recycling program.

We may seek to repurchase Exchangeable Notes depending on prevailing market conditions, our liquidity requirements, and other factors.

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

We continue to evaluate sources of financing for our business activities, including borrowings under the Credit Facility, issuance of public and private unsecured debt, fixed-rate secured mortgage financing, and offerings of the Company’s common stock. However, the Operating Partnership’s ability to obtain new financing or refinance existing borrowings on favorable terms could be impacted by various factors including the state of economic conditions, significant tenant defaults, a decline in the demand for office or industrial properties, a decrease in market rental rates or market values of real estate assets in our submarkets, and the amount of future borrowings. These events could result in the following:

•   Decreases in our cash flows from operations, which could create further dependence on our Credit Facility;

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

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

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

Debt Covenants

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

				Actual Performance at
	Covenant Level			June 30, 2011
Credit Facility (as defined in the Credit Agreement):
Total debt to total asset value		less than 60	%		39	%
Fixed charge coverage ratio		greater than 1.5	x		2.5	x
Unsecured debt ratio		greater than 1.67	x		2.35	x
Unencumbered asset pool debt service coverage		greater than 2.0	x		3.8	x
Unsecured Senior Notes due 2015 and 2020 (as defined in the Indentures):
Total debt to total asset value		less than 60	%		44	%
Interest coverage		greater than 1.5	x		3.0	x
Secured debt to total asset value		less than 40	%		12	%
Unencumbered asset pool value to unsecured debt		greater than 150	%		240	%

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The Operating Partnership was in compliance with all its debt covenants as of June 30, 2011. Our current expectation is that the Operating Partnership will continue to meet the requirements of its debt covenants in both the short and long term. However, in the event of a renewed economic slow down and continued volatility in the credit markets, there is no certainty that the Operating Partnership will be able to continue to satisfy all the covenant requirements.

Consolidated Historical Cash Flow Summary

Our historical cash flow activity for the six months ended June 30, 2011 as compared to the six months ended June 30, 2010 is as follows:

	Six Months Ended June 30,
							Dollar			Percentage
	2011			2010			Change			Change
	($ in thousands)
Net cash provided by operating activities	$	56,465		$	57,388		$	(923	)		(1.6	)%
Net cash used in investing activities		(435,519	)		(414,108	)		(21,411	)		5.2	%
Net cash provided by financing activities		389,626			376,265			13,361			3.6	%

Operating Activities

Our cash flows from operations depends on numerous factors including the occupancy level of our portfolio, the rental rates achieved on our leases, the collectability of rent and recoveries from our tenants, the level of operating expenses, the impact of property acquisitions and related financing activities, and other general and administrative costs. Our net cash provided by operating activities decreased by $0.9 million, or 1.6%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010 primarily due to increased interest expense attributable to the increase in our average outstanding debt balances as a result of our acquisition activity partially offset by an increase in Net Operating Income generated primarily from our Acquisitions Portfolio. See additional information under the caption “-Rental Operations.”

Investing Activities

Our net cash used in investing activities is generally used to fund property acquisitions, recurring and nonrecurring capital expenditures for our operating properties, and development and redevelopment projects. Our net cash used in investing activities increased $21.4 million, or 5.2%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010. This net increase was primarily attributable to our increased acquisition activity and the $16.5 million in escrow deposits paid for potential future acquisitions.

Financing Activities

Our net cash provided by financing activities is generally impacted by our capital raising activities net of dividends and distributions paid to common and preferred security holders. Net cash provided by financing activities increased by $13.4 million, or 3.6%, for the six months ended June 30, 2011 compared to the six months ended June 30, 2010, and was primarily attributable to the following:

•   A net increase of approximately $17.5 million attributable to our various capital raising activities;

•   An offsetting decrease of $6.5 million as a result of the dividends paid on the 6.0 million common shares we issued in our April 2011 equity offering.

Consolidated Off-Balance Sheet Arrangements

As of June 30, 2011 and as of the date this report was filed, we did not have any off-balance sheet transactions, arrangements, or obligations, including contingent obligations.

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Non-GAAP Supplemental Financial Measure: Funds From Operations

We calculate FFO in accordance with the White Paper on FFO approved by the Board of Governors of NAREIT. The White Paper defines FFO as net income or loss calculated in accordance with GAAP, excluding extraordinary items, as defined by GAAP, and gains and losses from sales of depreciable operating property, plus real estate-related depreciation and amortization (excluding amortization of deferred financing costs and depreciation of non-real estate assets), and after adjustment for unconsolidated partnerships and joint ventures.

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

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

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

The following table presents our FFO for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011		2010
	(in thousands)
Net (loss) income available to common stockholders	$	(317	)	$	(1,783	)	$	717	$	3,103
Adjustments:
Net (loss) income attributable to noncontrolling common units of the Operating Partnership		(10	)		(60	)		24		132
Depreciation and amortization of real estate assets		31,970			23,501			61,029		44,229
Funds From Operations(1)	$	31,643		$	21,658		$	61,770	$	47,464

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

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ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our exposures to market risk have not changed materially since December 31, 2010. For a discussion of quantitative and qualitative disclosures about market risk, see “Item 7A: Quantitative and Qualitative Disclosures About Market Risk” in the Company’s and the Operating Partnership’s annual report on Form 10-K for the year ended December 31, 2010.

ITEM 4.  CONTROLS AND PROCEDURES

Kilroy Realty Corporation

The Company maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended) that are designed to ensure that information required to be disclosed in the Company’s reports under the Securities Exchange Act of 1934, as amended, is processed, recorded, summarized, and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Company carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures as of June 30, 2011, the end of the period covered by this report. Based on the foregoing, the Company’s Chief Executive Officer and Chief Financial Officer concluded, as of that time, that disclosure controls and procedures were effective at the reasonable assurance level.

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

Kilroy Realty, L.P.

The Operating Partnership maintains disclosure controls and procedures (as defined in Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended) that are designed to ensure that information required to be disclosed in the Operating Partnership’s reports under the Securities Exchange Act of 1934, as amended, is processed, recorded, summarized, and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

As required by SEC Rule 13a-15(b), the Operating Partnership carried out an evaluation, under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures as of June 30, 2011, the end of the period covered by this report. Based on the foregoing, the Operating Partnership’s Chief Executive Officer and Chief Financial Officer concluded, as of that time, that disclosure controls and procedures were effective at the reasonable assurance level.

There have been no significant changes that occurred during the quarter covered by this report in the Operating Partnership’s internal control over financial reporting identified in connection with the evaluation referenced above that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

56

PART II—OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

We are not defendants in, and our properties are not subject to, any legal proceedings that, if determined adversely to us, would have a material adverse effect upon our financial condition, results of operations, or cash flows.

ITEM 1A.  RISK FACTORS

There have been no material changes to the risk factors included in the Company’s and the Operating Partnership’s annual report on Form 10-K for the year ended December 31, 2010.

ITEM 2.  UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS-None

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES-None

ITEM 4. (REMOVED and RESERVED)

ITEM 5.  OTHER INFORMATION-None

57

ITEM 6.  EXHIBITS

Exhibit
Number			Description
	3	.(i)1	Kilroy Realty Corporation Articles of Restatement(1)
	3	.(i)2	Certificate of Limited Partnership of Kilroy Realty, L.P.(2)
	3	.(i)3	Amendment to the Certificate of Limited Partnership of Kilroy Realty, L.P.(2)
	3	.(ii)1	Second Amended and Restated Bylaws of Kilroy Realty Corporation(3)
	3	.(ii)2	Amendment No. 1 to Second Amended and Restated Bylaws of Kilroy Realty Corporation(4)
	4	.1	Supplemental Indenture, dated July 5, 2011, among Kilroy Realty, L.P., as issuer, Kilroy Realty Corporation, as guarantor, and U.S. Bank National Association, as trustee(5)
	10	.1	First Amendment to Revolving Credit Agreement, dated June 22, 20116)
	31	.1*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty Corporation
	31	.2*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty Corporation
	31	.3*	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer of Kilroy Realty, L.P.
	31	.4*	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer of Kilroy Realty, L.P.
	32	.1*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty Corporation
	32	.2*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty Corporation
	32	.3*	Section 1350 Certification of Chief Executive Officer of Kilroy Realty, L.P.
	32	.4*	Section 1350 Certification of Chief Financial Officer of Kilroy Realty, L.P.
	101	.1	The following Kilroy Realty Corporation and Kilroy Realty, L.P. financial information for the quarter ended June 30, 2011, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets (unaudited), (ii) Consolidated Statements of Operations (unaudited), (iii) Consolidated Statements of Equity (unaudited), (iv) Consolidated Statements of Capital (v) Consolidated Statements of Cash Flows (unaudited) and(vi) Notes to Consolidated Financial Statements (unaudited).(7)

*	Filed herewith
(1)	Previously filed by Kilroy Realty Corporation as an exhibit on Form 10-K for the year ended December 31, 2009.
(2)	Previously filed by Kilroy Realty, L.P. as an exhibit to the General Form for Registration of Securities on Form 10 as filed with the Securities and Exchange Commission on August 18, 2010.
(3)	Previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on December 12, 2008.
(4)	Previously filed by Kilroy Realty Corporation as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on May 27, 2009.
(5)	Previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on July 6, 2011.
(6)	Previously filed by Kilroy Realty Corporation and Kilroy Realty, L.P. as an exhibit on Form 8-K as filed with the Securities and Exchange Commission on June 23, 2011.
(7)	Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933 or Section 18 of the Securities Exchange Act of 1934 and otherwise are not subject to liability under these sections.

58

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on July 26, 2011.

Kilroy Realty Corporation

By:  /s/  John B. Kilroy, Jr.

John B. Kilroy, Jr.

President and Chief Executive

Officer (Principal Executive Officer)

By:  /s/  Tyler H. Rose

Tyler H. Rose

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

By:  /s/  Heidi R. Roth

Heidi R. Roth

Senior Vice President and Controller

(Principal Accounting Officer)

59

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on July 26, 2011.

Kilroy Realty, L.P.

BY:  Kilroy Realty Corporation

Its general partner

By:  /s/  John B. Kilroy, Jr.

John B. Kilroy, Jr.

President and Chief Executive

Officer (Principal Executive Officer)

By:  /s/  Tyler H. Rose

Tyler H. Rose

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

By:  /s/  Heidi R. Roth

Heidi R. Roth

Senior Vice President and Controller

(Principal Accounting Officer)

60

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John B. Kilroy, Jr., certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Kilroy Realty Corporation;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John B. Kilroy, Jr.  

John B. Kilroy, Jr. 

President and Chief Executive Officer 

Date: July 26, 2011 

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Kilroy Realty Corporation;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Tyler H. Rose  

Tyler H. Rose 

Executive Vice President and
Chief Financial Officer 

Date: July 26, 2011 

EX-31.3

Exhibit 31.3

Certification of Chief Executive Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, John B. Kilroy, Jr., certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Kilroy Realty, L.P. ;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ John B. Kilroy, Jr.  

John B. Kilroy, Jr. 

President and Chief Executive Officer
Kilroy Realty Corporation, sole general partner of
    Kilroy Realty, L.P. 

Date: July 26, 2011 

EX-31.4

Exhibit 31.4

Certification of Chief Financial Officer
Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Tyler H. Rose , certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Kilroy Realty, L.P. ;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Tyler H. Rose  

Tyler H. Rose 

Executive Vice President and
Chief Financial Officer
Kilroy Realty Corporation, sole general partner of
   Kilroy Realty, L.P. 

Date: July 26, 2011 

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

     Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i)	the accompanying Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and
(ii)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ John B. Kilroy, Jr.  

John B. Kilroy, Jr. 

President and Chief Executive Officer 

Date: July 26, 2011 

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

     Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation (the “Company”) hereby certifies, to his knowledge, that:

(i)	the accompanying Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and
(ii)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Tyler H. Rose  

Tyler H. Rose 

Executive Vice President and
Chief Financial Officer 

Date: July 26, 2011 

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of the Company or Kilroy Realty, L.P. under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of Chief Executive Officer

     Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the “Operating Partnership”), hereby certifies, to his knowledge, that:

(i)	the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarter ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and
(ii)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ John B. Kilroy, Jr.  

John B. Kilroy, Jr. 

President and Chief Executive Officer
Kilroy Realty Corporation, sole general partner of
   Kilroy Realty, L.P.

Date: July 26, 2011 

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of Chief Financial Officer

     Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Kilroy Realty Corporation, the sole general partner of Kilroy Realty, L.P. (the “Operating Partnership”), hereby certifies, to his knowledge, that:

(i)	the accompanying Quarterly Report on Form 10-Q of the Operating Partnership for the quarter ended June 30, 2011 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and
(ii)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Operating Partnership.

/s/ Tyler H. Rose  

Tyler H. Rose 

Executive Vice President and  
Chief Financial Officer
Kilroy Realty Corporation, sole general partner of
   Kilroy Realty, L.P.

Date: July 26, 2011 

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350, is not being filed as part of the Report or as a separate disclosure document, and is not being incorporated by reference into any filing of Kilroy Realty Corporation or the Operating Partnership under the Securities Act of 1933, as amended, or the Securities Act of 1934, as amended, (whether made before or after the date of the Report) irrespective of any general incorporation language contained in such filing. The signed original of this written statement required by Section 906 has been provided to the Operating Partnership and will be retained by the Operating Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

XML



Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Jul. 25, 2011
Entity Registrant Name	KILROY REALTY CORP
Entity Central Index Key	0001025996
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		58,464,412
Kilroy Realty, L.P. [Member]
Entity Registrant Name	Kilroy Realty, L.P.
Entity Central Index Key	0001493976
Document Type	10-Q
Document Period End Date	Jun. 30, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer

XML



Consolidated Statements of Capital (KILROY REALTY, L.P.) (Kilroy Realty, L.P. [Member], USD $) In Thousands, except Share data	6 Months Ended						6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Partners Capital Preferred Units [Member]	Dec. 31, 2010 Partners Capital Preferred Units [Member]	Jun. 30, 2010 Partners Capital Preferred Units [Member]	Dec. 31, 2009 Partners Capital Preferred Units [Member]	Jun. 30, 2011 Partners Capital Common Unit [Member]	Jun. 30, 2010 Partners Capital Common Unit [Member]	Jun. 30, 2011 Total Partners Capital [Member]	Jun. 30, 2010 Total Partners Capital [Member]	Jun. 30, 2011 Noncontrolling Interest In Consolidated Subsidiaries [Member]	Jun. 30, 2010 Noncontrolling Interest In Consolidated Subsidiaries [Member]
Beginning Balance	$ 1,117,730	$ 883,838	$ 121,582	$ 121,582	$ 121,582	$ 121,582	$ 994,511	$ 760,756	$ 1,116,093	$ 882,338	$ 1,637	$ 1,500
Beginning Balance units							54,072,801	44,871,893
Net income	8,339	10,833					8,274	10,737	8,274	10,737	65	96
Issuance of common units, units (Note 8)							6,037,500	9,200,000
Issuance of common units (Note 8)	221,015	299,847					221,015	299,847	221,015	299,847
Issuance of share-based compensation awards, shares (Note 9)							68,727	3,239
Issuance of share-based compensation awards (Note 9)	2,156	1,660					2,156	1,660	2,156	1,660
Noncash amortization of share-based compensation	2,813	3,361					2,813	3,361	2,813	3,361
Exercise of stock options	395	83					395	83	395	83
Exercise of stock options, units							15,000	4,000
Repurchase of common units and restricted stock units, units (Note 9)							(11,485)	(59,782)
Repurchase of common units and restricted stock units (Note 9)	(732)	(2,121)					(732)	(2,121)	(732)	(2,121)
Allocation to the equity component of cash paid upon repurchase of 3.25% Exchangeable Notes		(2,694)						(2,694)		(2,694)
Other								20		20		(20)
Preferred distributions and dividends	(7,598)	(7,598)					(7,598)	(7,598)	(7,598)	(7,598)
Distributions declared per common unit ($0.70 per unit)	(40,585)	(35,143)					(40,585)	(35,143)	(40,585)	(35,143)
Ending Balance	$ 1,303,533	$ 1,152,066	$ 121,582	$ 121,582	$ 121,582	$ 121,582	$ 1,180,249	$ 1,028,908	$ 1,301,831	$ 1,150,490	$ 1,702	$ 1,576
Ending Balance units							60,182,543	54,019,350

XML



Consolidated Statements of Capital (KILROY REALTY, L.P.) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Interest rate on exchangeable notes		3.25%
Kilroy Realty, L.P. [Member]
Interest rate on exchangeable notes		3.25%
Distributions declared per common unit	$ 0.70	$ 0.70
Kilroy Realty, L.P. [Member] | Partner's Capital Common Unit [Member]
Interest rate on exchangeable notes		3.25%
Distributions declared per common unit	$ 0.70	$ 0.70
Kilroy Realty, L.P. [Member] | Total Partners Capital [Member]
Interest rate on exchangeable notes		3.25%
Distributions declared per common unit	$ 0.70	$ 0.70

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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,339	$ 10,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of building and improvements and leasing costs	61,029	44,229
Increase in provision for bad debts	146	14
Depreciation of furniture, fixtures and equipment	530	431
Noncash amortization of share-based compensation awards	2,239	3,519
Noncash amortization of deferred financing costs and debt discounts and premiums	6,884	5,750
Noncash amortization of above/(below) market rents (Note 3)	1,398	32
Loss on early extinguishment of debt		4,564
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(4,668)	(4,775)
Changes in operating assets and liabilities:
Marketable securities	(752)	(635)
Current receivables	1,380	483
Deferred rent receivables	(8,906)	(5,421)
Other deferred leasing costs	398	(2,594)
Prepaid expenses and other assets	(3,519)	(2,991)
Accounts payable, accrued expenses and other liabilities	(6,384)	(4,177)
Deferred revenue	(577)	507
Rents received in advance and tenant security deposits	(1,072)	7,619
Net cash provided by operating activities	56,465	57,388
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties (Note 2)	(378,554)	(373,574)
Expenditures for operating properties	(28,230)	(33,593)
Expenditures for development and redevelopment properties and undeveloped land	(12,347)	(8,113)
Net increase in escrow deposits	(16,500)
Decrease in restricted cash	112	1,096
Receipt of principal payments on note receivable		76
Net cash used in investing activities	(435,519)	(414,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock (Note 7)	221,015	299,847
Borrowings on unsecured line of credit	302,000	288,000
Repayments on unsecured line of credit	(216,000)	(235,000)
Principal payments on secured debt	(3,403)	(100,104)
Repurchase of exchangeable senior notes		(151,097)
Proceeds from issuance of secured debt (Note 5)	135,000	71,000
Proceeds from issuance of unsecured debt		247,870
Financing costs	(5,201)	(4,643)
Decrease in loan deposits	2,027	1,420
Repurchase of common stock and restricted stock units	(732)	(2,121)
Proceeds from exercise of stock options	395	83
Dividends and distributions paid to common stockholders and common unitholders	(37,877)	(31,392)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(7,598)	(7,598)
Net cash provided by financing activities	389,626	376,265
Net increase in cash and cash equivalents	10,572	19,545
Cash and cash equivalents, beginning of period	14,840	9,883
Cash and cash equivalents, end of period	25,412	29,428
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $3,327 and $4,055 as of June 30, 2011 and 2010, respectively	34,568	18,634
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	9,966	11,378
Tenant improvements funded directly by tenants to third parties	3,027	1,946
Assumption of secured debt with property acquisition (Notes 2 and 5)	30,042	51,079
Assumption of other liabilities with property acquisitions (Note 2)	4,438	6,369
NONCASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders	21,064	18,907
Accrual of dividends and distributions payable to preferred stockholders and preferred unitholders	1,909	1,909
Issuance of share-based compensation awards (Note 9)	7,216	5,418
Exchange of common units of the Operating Partnership into shares of the Company's common stock	$ 91

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Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, capitalized interest	$ 3,327	$ 4,055

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Consolidated Statements of Cash Flows (KILROY REALTY, L.P.) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,339	$ 10,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of building and improvements and leasing costs	61,029	44,229
Increase in provision for bad debts	146	14
Depreciation of furniture, fixtures and equipment	530	431
Noncash amortization of share-based compensation awards	2,239	3,519
Noncash amortization of deferred financing costs and debt discounts and premiums	6,884	5,750
Noncash amortization of above/(below) market rents (Note 3)	1,398	32
Loss on early extinguishment of debt		4,564
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(4,668)	(4,775)
Changes in operating assets and liabilities:
Marketable securities	(752)	(635)
Current receivables	1,380	483
Deferred rent receivables	(8,906)	(5,421)
Other deferred leasing costs	398	(2,594)
Prepaid expenses and other assets	(3,519)	(2,991)
Accounts payable, accrued expenses and other liabilities	(6,384)	(4,177)
Deferred revenue	(577)	507
Rents received in advance and tenant security deposits	(1,072)	7,619
Net cash provided by operating activities	56,465	57,388
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties (Note 2)	(378,554)	(373,574)
Expenditures for operating properties	(28,230)	(33,593)
Expenditures for development and redevelopment properties and undeveloped land	(12,347)	(8,113)
Net increase in escrow deposits	(16,500)
Decrease in restricted cash	112	1,096
Receipt of principal payments on note receivable		76
Net cash used in investing activities	(435,519)	(414,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on unsecured line of credit	302,000	288,000
Repayments on unsecured line of credit	(216,000)	(235,000)
Principal payments on secured debt	(3,403)	(100,104)
Repurchase of exchangeable senior notes		(151,097)
Proceeds from issuance of secured debt (Note 5)	135,000	71,000
Proceeds from issuance of unsecured debt		247,870
Financing costs	(5,201)	(4,643)
Decrease in loan deposits	2,027	1,420
Repurchase of common stock and restricted stock units	(732)	(2,121)
Proceeds from exercise of stock options	395	83
Dividends and distributions paid to common stockholders and common unitholders	(37,877)	(31,392)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(7,598)	(7,598)
Net cash provided by financing activities	389,626	376,265
Net increase in cash and cash equivalents	10,572	19,545
Cash and cash equivalents, beginning of period	14,840	9,883
Cash and cash equivalents, end of period	25,412	29,428
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $3,327 and $4,055 as of June 30, 2011 and 2010, respectively	34,568	18,634
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	9,966	11,378
Tenant improvements funded directly by tenants to third parties	3,027	1,946
Assumption of secured debt with property acquisition (Notes 2 and 5)	30,042	51,079
Assumption of other liabilities with property acquisitions (Note 2)	4,438	6,369
NONCASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders	21,064	18,907
Accrual of distributions payable to preferred unitholders	1,909	1,909
Issuance of share-based compensation awards (Note 9)	7,216	5,418
Kilroy Realty, L.P. [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	8,339	10,833
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of building and improvements and leasing costs	61,029	44,229
Increase in provision for bad debts	146	14
Depreciation of furniture, fixtures and equipment	530	431
Noncash amortization of share-based compensation awards	2,239	3,519
Noncash amortization of deferred financing costs and debt discounts and premiums	6,884	5,750
Noncash amortization of above/(below) market rents (Note 3)	1,398	32
Loss on early extinguishment of debt		4,564
Noncash amortization of deferred revenue related to tenant-funded tenant improvements	(4,668)	(4,775)
Changes in operating assets and liabilities:
Marketable securities	(752)	(635)
Current receivables	1,380	483
Deferred rent receivables	(8,906)	(5,421)
Other deferred leasing costs	398	(2,594)
Prepaid expenses and other assets	(3,519)	(2,991)
Accounts payable, accrued expenses and other liabilities	(6,384)	(4,177)
Deferred revenue	(577)	507
Rents received in advance and tenant security deposits	(1,072)	7,619
Net cash provided by operating activities	56,465	57,388
CASH FLOWS FROM INVESTING ACTIVITIES:
Expenditures for acquisition of operating properties (Note 2)	(378,554)	(373,574)
Expenditures for operating properties	(28,230)	(33,593)
Expenditures for development and redevelopment properties and undeveloped land	(12,347)	(8,113)
Net increase in escrow deposits	(16,500)
Decrease in restricted cash	112	1,096
Receipt of principal payments on note receivable		76
Net cash used in investing activities	(435,519)	(414,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common units (Note 8)	221,015	299,847
Borrowings on unsecured line of credit	302,000	288,000
Repayments on unsecured line of credit	(216,000)	(235,000)
Principal payments on secured debt	(3,403)	(100,104)
Repurchase of exchangeable senior notes		(151,097)
Proceeds from issuance of secured debt (Note 5)	135,000	71,000
Proceeds from issuance of unsecured debt		247,870
Financing costs	(5,201)	(4,643)
Decrease in loan deposits	2,027	1,420
Repurchase of common stock and restricted stock units	(732)	(2,121)
Proceeds from exercise of stock options	395	83
Dividends and distributions paid to common stockholders and common unitholders	(37,877)	(31,392)
Dividends and distributions paid to preferred stockholders and preferred unitholders	(7,598)	(7,598)
Net cash provided by financing activities	389,626	376,265
Net increase in cash and cash equivalents	10,572	19,545
Cash and cash equivalents, beginning of period	14,840	9,883
Cash and cash equivalents, end of period	25,412	29,428
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $3,327 and $4,055 as of June 30, 2011 and 2010, respectively	34,568	18,634
NONCASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	9,966	11,378
Tenant improvements funded directly by tenants to third parties	3,027	1,946
Assumption of secured debt with property acquisition (Notes 2 and 5)	30,042	51,079
Assumption of other liabilities with property acquisitions (Note 2)	4,438	6,369
NONCASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders	21,064	18,907
Accrual of distributions payable to preferred unitholders	1,909	1,909
Issuance of share-based compensation awards (Note 9)	$ 7,216	$ 5,418

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Consolidated Statements of Cash Flows (KILROY REALTY, L.P.) (Parenthetical) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, capitalized interest	$ 3,327	$ 4,055
Kilroy Realty, L.P. [Member]
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, capitalized interest	$ 3,327	$ 4,055

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Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2011

Organization and Basis of Presentation [Abstract]

Organization and Basis of Presentation

1.   Organization and Basis of Presentation

Organization

Kilroy Realty Corporation (the “Company”) is a self-administered real estate investment trust (“REIT”) active in office and industrial submarkets along the West Coast. We own, develop, acquire and manage real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego, greater Seattle and the San Francisco Bay Area, which we believe have strategic advantages and strong barriers to entry. We qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). The Company’s common stock is publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “KRC.”

We own our interests in all of our real estate assets through Kilroy Realty, L.P. (the “Operating Partnership”) and Kilroy Realty Finance Partnership, L.P. (the “Finance Partnership”). We conduct substantially all of our operations through the Operating Partnership. Unless stated otherwise or the context indicates otherwise, the term “Kilroy Realty Corporation” or the “Company” refers to Kilroy Realty Corporation and its consolidated subsidiaries and the term “Operating Partnership” refers to Kilroy Realty, L.P. and its consolidated subsidiaries. The terms “the Company,” “we,” “our,” and “us” refer to the Company or the Company and the Operating Partnership together, as the context requires. The descriptions of our business, employees, and properties apply to both the Company and the Operating Partnership.

The following table of office buildings (the “Office Properties”) and industrial buildings (the “Industrial Properties”) summarizes our stabilized portfolio of operating properties as of June 30, 2011. As of June 30, 2011, all of our properties and all of our business is currently conducted in the state of California with the exception of the operation of six office properties located in the state of Washington.

	Number of		Rentable		Number of
	Buildings		Square Feet		Tenants		Percentage Occupied
Office Properties(1)		107		11,465,821		416		87.9	%
Industrial Properties		40		3,605,407		62		97.6	%
Total Stabilized Portfolio		147		15,071,228		478		90.2	%

(1) Includes eight office properties acquired during the six months ended June 30, 2011 for a total amount of $413.0 million (see Note 2 for additional information).

Our stabilized portfolio excludes undeveloped land, development and redevelopment properties currently under construction or committed for construction, “lease-up” properties, and one property that we are in the process of repositioning for residential use. As of June 30, 2011, we had one office redevelopment property encompassing approximately 300,000 rentable square feet under construction and we had one office redevelopment property encompassing approximately 98,000 rentable square feet which we removed from the stabilized portfolio since it was committed for redevelopment. We define “lease-up” properties as properties we recently developed or redeveloped that have not yet reached 95% occupancy and are within one year following cessation of major construction activities. We had no “lease-up” properties as of June 30, 2011.

As of June 30, 2011, the Company owned a 97.1% general partnership interest in the Operating Partnership. The remaining 2.9% common limited partnership interest in the Operating Partnership as of June 30, 2011 was owned by non-affiliated investors and certain of our directors and officers (see Note 6). Both the general and limited common partnership interests in the Operating Partnership are denominated in common units. The number of common units held by the Company is at all times equivalent to the number of outstanding shares of the Company’s common stock, and the entitlements of all the common units to quarterly distributions and payments in liquidation mirror those of the the Company’s common stockholders. The common limited partners have certain redemption rights as provided in the Operating Partnership’s Fifth Amended and Restated Agreement of Limited Partnership (as amended, the “Partnership Agreement”) (see Note 6).

Kilroy Realty Finance, Inc., our wholly-owned subsidiary, is the sole general partner of the Finance Partnership and owns a 1.0% general partnership interest. The Operating Partnership owns the remaining 99.0% limited partnership interest. Kilroy Services, LLC (“KSLLC”), which is a wholly-owned subsidiary of the Operating Partnership, is the entity through which we conduct substantially all of our development activities. With the exception of the Operating Partnership, all of our subsidiaries, which include Kilroy Realty TRS, Inc., Kilroy Realty Management, L.P., Kilroy RB, LLC, Kilroy RB II, LLC, Kilroy Realty Northside Drive, LLC, and Kilroy Realty 303, LLC, are wholly-owned.

Basis of Presentation

The consolidated financial statements of the Company include the consolidated financial position and results of operations of the Company, the Operating Partnership, the Finance Partnership, KSLLC, and all of our wholly-owned subsidiaries. The consolidated financial statements of the Operating Partnership include the consolidated financial position and results of operations of the Operating Partnership, the Finance Partnership, KSLLC, and all wholly-owned subsidiaries of the Operating Partnership. All intercompany balances and transactions have been eliminated in the consolidated financial statements.

The consolidated financial statements of the Company and the Operating Partnership also include variable interest entities (“VIE”) in which we are deemed to be the primary beneficiary. As of June 30, 2011, we had one bankruptcy-remote VIE, Kilroy Realty Northside Drive, LLC, which was formed in 2010 to hold three properties that secure the debt we assumed when we acquired the properties in 2010. The assets held by this entity are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

The accompanying interim financial statements have been prepared by management in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in conjunction with the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures required for annual financial statements have been condensed or excluded pursuant to SEC rules and regulations. Accordingly, the interim financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying interim financial statements reflect all adjustments of a normal and recurring nature that are considered necessary for a fair presentation of the results for the interim periods presented. However, the results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. The interim financial statements for the Company and the Operating Partnership should be read in conjunction with the audited consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2010.

Change in Reportable Segments from Form 10-K for the year ended December 31, 2010

Our chief operating decision-makers internally evaluate the operating performance and financial results of our portfolio based on Net Operating Income for the following two segments of commercial real estate property: Office Properties and Industrial Properties. We define “Net Operating Income” as operating revenues (rental income, tenant reimbursements, and other property income) less operating expenses (property expenses, real estate taxes, provision for bad debts, and ground leases).

During the three and six months ended June 30, 2011, the amount of revenues and Net Operating Income generated by our Industrial Properties, in relation to our total consolidated operating portfolio revenues and Net Operating Income, had fallen below the required 10% quantitative reporting thresholds for the Industrial Properties to be considered a reportable segment under GAAP. Therefore, for the three and six months ended June 30, 2011, our only reportable segment is our Office Properties segment. See Note 13 for a reconciliation of our Office Properties segment to our consolidated revenues, Net Operating Income, net income and consolidated assets.

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Acquisitions

6 Months Ended

Jun. 30, 2011

Acquisitions [Abstract]

Acquisitions

2.   Acquisitions

During the six months ended June 30, 2011, we acquired the eight office properties listed below from unrelated third parties. Unless otherwise noted, we funded these acquisitions principally with the net proceeds from the Company’s public offering of common stock (see Note 7), and borrowings under the unsecured line of credit (see Note 5).

							Percentage
							Occupied
					Rentable		as of			Purchase
	Property	Date of	Number of		Square		June 30,			Price
Property	Type	Acquisition	Buildings		Feet		2011			(in millions)(1)
250 Brannan Street San Francisco, CA	Office	January 28, 2011		1		90,742		76.7	%	$	33.0
10210, 10220, and 10230 NE Points Drive; 3933 Lake Washington Boulevard NE Kirkland, WA(2)	Office	April 21, 2011		4		279,924		87.3	%		100.1
10770 Wateridge Circle San Diego, CA	Office	May 12, 2011		1		174,310		97.5	%		32.7
601 108th Avenue N.E. Bellevue, WA	Office	June 3, 2011		1		488,470		89.8	%		215.0
4040 Civic Center Drive San Rafael, CA	Office	June 9, 2011		1		126,787		93.1	%		32.2
Total				8		1,160,233				$	413.0

(1)	Excludes acquisition-related costs.
(2)	In connection with this acquisition, we assumed secured debt with an outstanding principal balance of $30.0 million and a premium of $1.0 million as a result of recording this debt at fair value on the acquisition date (see Note 5).

The related assets, liabilities, and results of operations of all acquired properties are included in the consolidated financial statements as of the date of acquisition. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the respective acquisition dates:

	601 108th Avenue		All Other
	N.E., Bellevue, WA(1)		Acquisitions(2)		Total
	(in thousands)
Assets
Land(3)	$	—	$	36,740	$	36,740
Buildings and improvements(4)		214,095		143,545		357,640
Undeveloped land		—		2,560		2,560
Deferred leasing costs and acquisition-related intangible assets(5)		13,790		17,500		31,290
Total assets acquired		227,885		200,345		428,230
Liabilities
Deferred revenue and acquisition-related intangible liabilities(6)		12,850		1,390		14,240
Secured debt(7)		—		30,997		30,997
Accounts payable, accrued expenses and other liabilities		2,380		2,059		4,439
Total liabilities assumed		15,230		34,446		49,676
Net assets and liabilities acquired(8)	$	212,655	$	165,899	$	378,554

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The purchase price of all other acquisitions completed during the six months ended June 30, 2011 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2010.
(3)	In connection with the acquisition of 601 108th Avenue N.E., Bellevue, WA,, we assumed the lessee obligations under a noncancellable ground lease that is scheduled to expire in November 2093 (see Notes 3 and 11).
(4)	Represents buildings, building improvements, and tenant improvements.
(5)	Represents in-place leases (approximately $18.9 million with a weighted average amortization period of 4.1 years), above-market leases (approximately $6.6 million with a weighted average amortization period of 4.5 years), and unamortized leasing commissions (approximately $5.7 million with a weighted average amortization period of 2.8 years).
(6)	Represents below-market leases (approximately $9.0 million with a weighted average amortization period of 4.3 years) and an above-market ground lease obligation (approximately $5.2 million with a weighted average amortization period of 82.5 years), under which we are the lessee.
(7)	Represents the mortgage loan, which includes an unamortized premium of approximately $1.0 million, assumed in connection with the properties acquired in April 2011 (see Note 5).
(8)	Reflects the purchase price net of assumed secured debt and other lease-related obligations.

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Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net

6 Months Ended

Jun. 30, 2011

Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net [Abstract]

Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net

3.   Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net

The following table summarizes our identified deferred leasing costs and acquisition-related intangible assets (acquired value of leasing costs, above-market leases, and in-place leases) and intangible liabilities (acquired value of below-market leases and above-market ground lease obligation) as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net(1):
Deferred leasing costs	$	131,098		$	128,980
Accumulated amortization		(43,921	)		(45,869	)
Deferred leasing costs, net		87,177			83,111
Above-market leases		27,922			21,321
Accumulated amortization		(4,747	)		(2,163	)
Above-market leases, net		23,175			19,158
In-place leases		50,915			36,964
Accumulated amortization		(8,036	)		(8,167	)
In-place leases, net		42,879			28,797
Total deferred leasing costs and acquisition-related intangible assets, net	$	153,231		$	131,066
Acquisition-related Intangible Liabilities, net(1)(2):
Below-market leases	$	27,152		$	21,938
Accumulated amortization		(2,462	)		(5,094	)
Below-market leases, net		24,690			16,844
Above-market ground lease obligation		5,200			—
Accumulated amortization		(5	)		—
Above-market ground lease obligation, net		5,195			—
Total acquisition-related intangible liabilities, net	$	29,885		$	16,844

(1)

Balances and accumulated amortization amounts at June 30, 2011 reflect the write-off of the following fully amortized amounts at January 1, 2011: deferred leasing costs (approximately $10.4 million), in-place leases (approximately $5.0 million), and below-market leases (approximately $3.8 million). Our accounting policy is to write-off the asset and corresponding accumulated amortization for fully amortized balances on January 1st of each fiscal year.

(2)

Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

The following table sets forth amortization related to deferred leasing costs and acquisition-related intangibles for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended
	June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Deferred leasing costs(1)	$	3,970	$	2,968	$	7,738	$	5,673
Net above-market leases(2)		745		60		1,398		32
In-place leases(1)		2,686		267		4,859		285
Above-market ground lease obligation(3)		5		—		5		—
Total	$	7,406	$	3,295	$	14,000	$	5,990

(1)	The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
(2)	The amortization of net above-market leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.
(3)	The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

The following table sets forth the estimated annual amortization expense related to deferred leasing costs and acquisition-related intangibles as of June 30, 2011 for future periods:

								Above-Market
	Deferred Leasing		Net Above-/(Below)-			In-Place		Ground Lease
Year Ending	Costs		Market Leases(1)			Leases		Obligation
	(in thousands)
Remaining 2011	$	8,946	$	706		$	6,165	$	32
2012		16,558		1,303			10,766		63
2013		14,751		1,062			8,682		63
2014		13,042		324			6,922		63
2015		9,859		(220	)		3,991		63
Thereafter		24,021		(4,690	)		6,353		4,911
Total	$	87,177	$	(1,515	)	$	42,879	$	5,195

(1) Represents estimated annual net amortization related to above-/(below)-market leases. Amounts shown for 2011-2014 represent net above-market leases which will be recorded as a decrease to rental income in the consolidated statement of operations, and amounts shown for the periods 2015 and thereafter represent net below-market leases which will be recorded as an increase to rental income in the consolidated statement of operations.

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Receivables

6 Months Ended

Jun. 30, 2011

Receivables [Abstract]

Receivables

4.   Receivables

Current Receivables, net

Current receivables, net is primarily comprised of contractual rents and other lease-related obligations due from tenants. The balance consisted of the following as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Current receivables	$	7,655		$	9,077
Allowance for uncollectible tenant receivables		(2,923	)		(2,819	)
Current receivables, net	$	4,732		$	6,258

Deferred Rent Receivables, net

Deferred rent receivables, net consisted of the following as of June 30, 2011 and December 31, 2010:

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred rent receivables	$	101,780		$	92,883
Allowance for deferred rent receivables		(3,822	)		(3,831	)
Deferred rent receivables, net	$	97,958		$	89,052

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Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
REAL ESTATE ASSETS:
Land and improvements (Note 2)	$ 528,082	$ 491,333
Buildings and improvements (Note 2)	2,820,766	2,435,173
Undeveloped land and construction in progress	303,998	290,365
Total real estate held for investment	3,652,846	3,216,871
Accumulated depreciation and amortization	(720,864)	(672,429)
Total real estate assets, net	2,931,982	2,544,442
CASH AND CASH EQUIVALENTS	25,412	14,840
RESTRICTED CASH	1,349	1,461
MARKETABLE SECURITIES (Note 12)	5,654	4,902
CURRENT RECEIVABLES, NET (Note 4)	4,732	6,258
DEFERRED RENT RECEIVABLES, NET (Note 4)	97,958	89,052
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)	153,231	131,066
DEFERRED FINANCING COSTS, NET (Note 5)	18,910	16,447
PREPAID EXPENSES AND OTHER ASSETS, NET	25,559	8,097
TOTAL ASSETS	3,264,787	2,816,565
LIABILITIES:
Secured debt, net (Notes 5 and 12)	475,820	313,009
Exchangeable senior notes, net (Notes 5 and 12)	303,374	299,964
Unsecured senior notes, net (Notes 5 and 12)	655,929	655,803
Unsecured line of credit (Notes 5 and 12)	245,000	159,000
Accounts payable, accrued expenses and other liabilities	66,664	68,525
Accrued distributions (Note 16)	22,563	20,385
Deferred revenue and acquisition-related intangible liabilities, net (Note 3)	90,149	79,322
Rents received in advance and tenant security deposits	28,117	29,189
Total liabilities	1,887,616	1,625,197
COMMITMENTS AND CONTINGENCIES (Note 11)
NONCONTROLLING INTEREST (Note 6):
7.45% Series A Cumulative Redeemable Preferred units of the Operating Partnership	73,638	73,638
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Common stock, $.01 par value, 150,000,000 shares authorized, 58,464,412 and 52,349,670 shares issued and outstanding, respectively	585	523
Additional paid-in capital	1,433,951	1,211,498
Distributions in excess of earnings	(285,916)	(247,252)
Total stockholders' equity	1,270,202	1,086,351
Noncontrolling interest :
Common units of the Operating Partnership ( Note 6 )	33,331	31,379
Total equity	1,303,533	1,117,730
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND EQUITY	3,264,787	2,816,565
Series A Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Cumulative Redeemable Preferred stock	0	0
Series E Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Cumulative Redeemable Preferred stock	38,425	38,425
Series F Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Cumulative Redeemable Preferred stock	$ 83,157	$ 83,157

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Secured and Unsecured Debt of the Operating Partnership

6 Months Ended

Jun. 30, 2011

Secured and Unsecured Debt of the Operating Partnership [Abstract]

Secured and Unsecured Debt of the Operating Partnership

5.   Secured and Unsecured Debt of the Operating Partnership

Secured Debt

In January 2011, the Operating Partnership borrowed $135.0 million under a mortgage loan that is scheduled to mature on February 1, 2018. The mortgage loan is secured by our 303 Second Street property in San Francisco, bears interest at an annual rate of 4.27%, and requires interest-only payments for the first two years with a 30-year amortization schedule thereafter. We used a portion of the proceeds to repay borrowings under the Operating Partnership’s unsecured line of credit (the “Credit Facility”).

In April 2011, in connection with the acquisition of four office buildings in Kirkland, Washington, the Operating Partnership assumed a mortgage loan that is secured by the project. The assumed mortgage loan had a principal balance of $30.0 million at the acquisition date and is scheduled to mature on April 15, 2015. This mortgage loan was recorded at fair value on the date of the acquisition resulting in a premium of approximately $1.0 million. This premium will be accreted on a straight-line basis, which approximates the effective interest method, as a reduction to interest expense from the acquisition date through the maturity date of the mortgage loan. The loan bears contractual interest at an annual rate of 4.94% and requires monthly principal and interest payments based on a 30-year amortization period.

Although both new mortgage loans are secured and non-recourse to the Company and the Operating Partnership, the Company provides limited customary secured debt guarantees for items such as voluntary bankruptcy, fraud, misapplication of payments, and environmental liabilities.

Exchangeable Senior Notes

The following table summarizes the balance and significant terms of the Company’s 3.25% Exchangeable Notes due 2012 (the “3.25% Exchangeable Notes”) and 4.25% Exchangeable Notes due 2014 (the “4.25% Exchangeable Notes” and together with the 3.25% Exchangeable Notes, the “Exchangeable Notes”) outstanding as of June 30, 2011 and December 31, 2010:

	3.25% Exchangeable Notes						4.25% Exchangeable Notes
	June 30,			December 31,			June 30,			December 31,
	2011			2010			2011			2010
	(in thousands)
Principal amount	$	148,000		$	148,000		$	172,500		$	172,500
Unamortized discount		(2,485	)		(4,004	)		(14,641	)		(16,532	)
Net carrying amount of liability component	$	145,515		$	143,996		$	157,859		$	155,968
Carrying amount of equity component	$33,675						$19,835
Maturity date	April 2012						November 2014
Stated coupon rate	3.25%(1)						4.25%(2)
Effective interest rate(3)	5.45%						7.13%
Exchange rate per $1,000 principal value of the Exchangeable Notes, as adjusted(4)	11.3636						27.8307
Exchange price, as adjusted(4)	$88.00						$35.93
Number of shares on which the aggregate consideration to be delivered on conversion is determined(4)	1,681,813						4,800,796

(1)	Interest on the 3.25% Exchangeable Notes is payable semi-annually in arrears on April 15th and October 15th of each year.
(2)	Interest on the 4.25% Exchangeable Notes is payable semi-annually in arrears on May 15th and November 15th of each year.
(3)	The rate at which we record interest expense for financial reporting purposes, which reflects the amortization of the discounts on the Exchangeable Notes. This rate represents our conventional debt borrowing rate at the date of issuance.
(4)	The exchange rate, exchange price, and the number of shares to be delivered upon conversion are subject to adjustment under certain circumstances including increases in our common dividends.

Capped Call Transactions

In connection with the offerings of the Exchangeable Notes, we entered into capped call option transactions (“capped calls”) to mitigate the dilutive impact of the potential exchange of the Exchangeable Notes. The following table summarizes our capped call option positions as of both June 30, 2011 and December 31, 2010:

	3.25% Exchangeable Notes(1)		4.25% Exchangeable Notes(2)
Referenced shares of common stock		1,121,201		4,800,796
Exchange price including effect of capped calls		$102.72		$42.81

(1)	The capped calls mitigate the dilutive impact to us of the potential exchange of two-thirds of the 3.25% Exchangeable Notes into shares of common stock.
(2)	The capped calls mitigate the dilutive impact to us of the potential exchange of all of the 4.25% Exchangeable Notes into shares of common stock.

For the three and six months ended June 30, 2011, the per share average trading price of the Company’s common stock on the New York Stock Exchange (“NYSE”) was higher than the $35.93 exchange price for the 4.25% Exchangeable Notes, as presented below:

	Three Months Ended		Six Months Ended
	June 30, 2011		June 30, 2011
Average Trading Price of the Company’s Stock	$	39.90	$	38.94

As a result, even though there would be no dilutive economic impact to our earnings until the Company’s share price exceeded $42.81, which is the exchange price after the impact of the capped calls, and even though the 4.25% Exchangeable Notes were not convertible as of June 30, 2011, we are required to include the dilutive impact of the 4.25% Exchangeable Notes based on the average share price in our diluted earnings per share and per unit calculations for the six months ended June 30, 2011 (see Notes 14 and 15). We are not required to include the the dilutive impact of the 4.25% Exchangeable Notes in our diluted earnings per share and per unit calculations for the three months ended June 30, 2011, since we had a net loss available to common stockholders and unitholders during this period and the effect would be anti-dilutive (see Notes 14 and 15). If the 4.25% Exchangeable Notes were able to be converted as of June 30, 2011, the approximate fair value of the shares upon conversion at that date would have been equal to approximately $191.4 million, which would exceed the $172.5 million principal amount of the 4.25% Exchangeable Notes by approximately $18.9 million.

Interest Expense for the Exchangeable Notes

The unamortized discount on the Exchangeable Notes is accreted as additional interest expense from the date of issuance through the maturity date of the applicable Exchangeable Notes. The following table summarizes the total interest expense attributable to the Exchangeable Notes based on the effective interest rates set forth above, before the effect of capitalized interest, for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Contractual interest payments	$	3,035	$	4,241	$	6,070	$	8,495
Amortization of discount		1,722		2,372		3,410		4,679
Interest expense attributable to the Exchangeable Notes	$	4,757	$	6,613	$	9,480	$	13,174

Unsecured Line of Credit

In June 2011, we amended the terms of our Credit Facility to extend the maturity date, and reduce the interest rate and facility fee. The following table summarizes the terms of our Credit Facility as of December 31, 2010 and as amended as of June 30, 2011:

	June 30,		December 31,
	2011		2010
	(in thousands)
Outstanding borrowings	$	245,000	$	159,000
Remaining borrowing capacity		255,000		341,000
Total borrowing capacity(1)	$	500,000	$	500,000
Interest rate(2)		2.87%		2.99%
Facility fee-annual rate(3)		0.350%		0.575%
Maturity date(4)		August 2015		August 2013

(1)	We may elect to borrow, subject to lender approval, up to an additional $200 million under an accordion feature under the terms of the Credit Facility.
(2)	The Credit Facility interest rate included interest at an annual rate of LIBOR plus 1.750% and 2.675% as of June 30, 2011 and December 31, 2010, respectively.
(3)	The facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we also incurred debt origination and legal costs of approximately $5.0 million when we entered into the Credit Facility in 2010 and an additional $3.3 million when we amended the Credit Facility in 2011. The unamortized balance of these costs will be amortized as additional interest expense over the extended term of the Credit Facility.
(4)	Under the terms of the Credit Facility, we may exercise an option to extend the maturity date by one year.

The Company intends to borrow amounts under the Credit Facility from time to time for general corporate purposes, to fund potential acquisitions, to finance development and redevelopment expenditures, and to potentially repay long-term debt.

Debt Covenants and Restrictions

The Credit Facility, the unsecured senior notes, and certain other secured debt arrangements contain covenants and restrictions requiring us to meet certain financial ratios and reporting requirements. Some of the more restrictive financial covenants include a maximum ratio of total debt to total asset value, a minimum fixed-charge coverage ratio, a minimum unsecured debt ratio, and a minimum unencumbered asset pool debt service coverage ratio. Noncompliance with one or more of the covenants and restrictions could result in the full or partial principal balance of the associated debt becoming immediately due and payable. We believe we were in compliance with all of our debt covenants as of June 30, 2011.

Debt Maturities

The following table summarizes the stated debt maturities and scheduled amortization payments, excluding debt discounts and premiums, as of June 30, 2011:

Year Ending	(in thousands)
Remaining 2011	$	72,262
2012		305,303
2013		6,373
2014		262,443
2015		602,382
Thereafter		450,028
Total	$	1,698,791	(1)

(1) Includes gross principal balance of outstanding debt before impact of all debt discounts and premiums.

Capitalized Interest and Loan Fees

The following table sets forth our gross interest expense, including debt discount/premium and loan cost amortization, net of capitalized interest, for the three and six months ended June 30, 2011 and 2010. The capitalized amounts are a cost of development and redevelopment, and increase the carrying value of undeveloped land and construction in progress.

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Gross interest expense	$	23,293		$	15,897		$	46,148		$	30,437
Capitalized interest		(2,065	)		(2,809	)		(4,044	)		(5,393	)
Interest expense	$	21,228		$	13,088		$	42,104		$	25,044

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Noncontrolling Interests on the Company's Consolidated Financial Statements

6 Months Ended

Jun. 30, 2011

Noncontrolling Interests on the Company's Consolidated Financial Statements [Abstract]

Noncontrolling Interests on the Company's Consolidated Financial Statements

6.   Noncontrolling Interests on the Company’s Consolidated Financial Statements

7.45% Series A Cumulative Redeemable Preferred Units of the Operating Partnership

As of both June 30, 2011 and December 31, 2010, the Operating Partnership had outstanding 1,500,000 7.45% Series A Cumulative Redeemable Preferred Units representing preferred limited partnership interests in the Operating Partnership with a redemption value of $50.00 per unit. There were no changes to this noncontrolling interest during the three and six months ended June 30, 2011 and 2010.

Common Units of the Operating Partnership

The Company owned a 97.1%, 96.8% and 96.7% common general partnership interest in the Operating Partnership as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. The remaining 2.9%, 3.2% and 3.3% common limited partnership interest as of June 30, 2011, December 31, 2010 and June 30, 2010, respectively, was owned in the form of common units by non-affiliate investors and certain of our executive officers and directors. There were 1,718,131 and 1,723,131 common units outstanding held by these investors, executive officers and directors as of June 30, 2011 and December 31, 2010, respectively.

The noncontrolling common units may be redeemed by unitholders for cash. We, at our option, may satisfy the cash redemption obligation with shares of the Company’s common stock on a one-for-one basis. Whether satisfied in cash or shares of the Company’s common stock, the value for each noncontrolling common unit upon redemption is the amount equal to the average of the closing quoted price per share of the Company’s common stock, par value $.01 per share, as reported on the NYSE for the ten trading days immediately preceding the applicable redemption date. The aggregate value upon redemption of the then-outstanding noncontrolling common units was $66.6 million and $61.4 million as of June 30, 2011 and December 31, 2010, respectively. This redemption value does not necessarily represent the amount that would be distributed with respect to each common unit in the event of our termination or liquidation. In the event of our termination or liquidation, it is expected in most cases that each common unit would be entitled to a liquidating distribution equal to the amount payable with respect to each share of the Company’s common stock.

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Stockholders' Equity of the Company

6 Months Ended

Jun. 30, 2011

Stockholders' Equity of the Company [Abstract]

Stockholders' Equity of the Company

7.   Stockholders’ Equity of the Company

Issuance of Common Stock

In April 2011, the Company completed an underwritten public offering of 6,037,500 shares of its common stock. The net offering proceeds, after deducting underwriting discounts and commissions and offering expenses, were approximately $221.0 million. We have used or, intend to use a portion of the net proceeds from the offering to fund acquisitions and for general corporate purposes.

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Partners' Capital of the Operating Partnership

6 Months Ended

Jun. 30, 2011

Partners' Capital of the Operating Partnership [Abstract]

Partners' Capital of the Operating Partnership

8.   Partners’ Capital of the Operating Partnership

Issuance of Common Units

In April 2011, the Company completed an underwritten public offering of 6,037,500 shares of its common stock as discussed in Note 7. The net offering proceeds of approximately $221.0 million were contributed by the Company to the Operating Partnership in exchange for 6,037,500 common units.

Common Units Outstanding

The Company owned 58,464,412, 52,349,670, and 52,296,219 common units representing a 97.1%, 96.8%, and 96.7% common general partnership interest in the Operating Partnership as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. The remaining 2.9%, 3.2%, and 3.3% common limited partnership interest as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively, was owned by non-affiliate investors and certain of our executive officers and directors in the form of noncontrolling common units. There were 1,718,131, 1,723,131, and 1,723,131 common units outstanding held by these investors, executive officers and directors as of June 30, 2011, December 31, 2010, and June 30, 2010, respectively. For a further discussion of the noncontrolling common units as of June 30, 2011 and December 31, 2010, please refer to Note 6.

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Share-Based Compensation

6 Months Ended

Jun. 30, 2011

Share-Based Compensation [Abstract]

Share-Based Compensation

9.   Share-Based Compensation

Stockholder Approved Equity Compensation Plans

As of June 30, 2011, we had one share-based incentive compensation plan, the Kilroy Realty 2006 Incentive Award Plan as amended (the “2006 Plan”). As of June 30, 2011, 3,821,041 shares were available for grant under the 2006 Plan. The number of shares that remains available for grant is calculated using the weighted share counting provisions set forth in the 2006 Plan, which are based on the type of awards that are granted. The maximum number of shares available for grant subject to full value awards (which generally include equity awards other than options and stock appreciation rights) was 1,308,576 shares as of June 30, 2011.

Summary of Nonvested Shares

A summary of our nonvested shares activity from January 1, 2011 through June 30, 2011 is presented below:

				Weighted-
				Average
				Grant Date
				Fair Value
Nonvested Shares	Shares			Per Share
Outstanding at January 1, 2011		50,032		$	58.40
Granted		68,727			37.83
Vested(1)		(9,474	)		56.76
Outstanding as of June 30, 2011		109,285		$	45.61

(1) The total shares vested include 2,198 shares that were then tendered to satisfy minimum statutory tax withholding requirements related to the restricted shares that have vested in accordance with the terms of the 2006 Plan. We accept the return of shares at the current quoted market price of the Company’s common stock to satisfy tax obligations.

A summary of our nonvested and vested shares activity for the six months ended June 30, 2011 and 2010 is presented below:

	Shares Granted				Shares Vested
			Weighted-Average
			Grant Date					Total Vest Date
	Non-Vested Shares		Fair Value					Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested Shares			(in thousands)
2011		68,727	$	37.83		(9,474	)	$	370
2010		3,239		30.88		(16,358	)		474

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

Summary of Restricted Stock Units

A summary of our restricted stock unit (“RSU”) activity from January 1, 2011 through June 30, 2011 is presented below:

	Nonvested RSUs
				Weighted-Average
				Grant Date
				Fair Value
	Amount			Per Share		Vested RSUs			Total RSUs
Outstanding at January 1, 2011		125,754		$	29.88		588,068			713,822
Granted		107,673			37.94		—			107,673
Vested		(23,035	)		30.57		23,035			—
Issuance of dividend equivalents(1)							13,494			13,494
Canceled(2)							(8,448	)		(8,448	)
Outstanding as of June 30, 2011		210,392		$	33.93		616,149			826,541

(1)	RSUs issued as dividend equivalents are vested upon issuance.
(2)	We accept the return of RSUs, at the current quoted market price of the Company’s common stock, to satisfy minimum statutory tax-withholding requirements related to either RSUs that have vested or RSU dividend equivalents in accordance with the terms of the 2006 Plan.

A summary of our RSU activity for the six months ended June 30, 2011 and 2010 is presented below:

	RSUs Granted				RSUs Vested
			Weighted-Average
			Grant Date				Total Vest-Date
	Non-Vested RSUs		Fair Value				Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested RSUs		(in thousands)
2011		107,673	$	37.94		23,035	$	897
2010		159,606		30.24		23,564		740

(1) Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

Compensation Cost Recorded During the Period

The total compensation cost for all share-based compensation programs was $1.4 million and $2.2 million for the three months ended June 30, 2011 and 2010, respectively, and $2.8 million and $4.3 million for the six months ended June 30, 2011 and 2010, respectively. Of the total share-based compensation cost, $0.3 million was capitalized as part of real estate assets for the three months ended June 30, 2011 and 2010, and $0.6 million and $0.7 million was capitalized as part of real estate assets for the six months ended June 30, 2011 and 2010, respectively. As of June 30, 2011, there was approximately $7.1 million of total unrecognized compensation cost related to nonvested incentive awards granted under share-based compensation arrangements that is expected to be recognized over a weighted-average period of 1.6 years. The remaining compensation cost related to these nonvested incentive awards had been recognized in periods prior to June 30, 2011.

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Future Minimum Rent

6 Months Ended

Jun. 30, 2011

Future Minimum Rent [Abstract]

Future Minimum Rent

10.   Future Minimum Rent

We have operating leases with tenants that expire at various dates through 2027 and are either subject to scheduled fixed increases or adjustments in rent based on the Consumer Price Index. Generally, the leases grant tenants renewal options. Leases also provide for additional rents based on certain operating expenses. Future contractual minimum rent under operating leases as of June 30, 2011 for future periods is summarized as follows:

Year Ending	(in thousands)
Remaining 2011	$	153,705
2012		313,019
2013		293,621
2014		263,342
2015		210,150
Thereafter		658,754
Total	$	1,892,591

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies [Abstract]

Commitments and Contingencies

11.   Commitments and Contingencies

Ground Leases

We have noncancellable ground lease obligations at one building in Bellevue, Washington which expires in November 2093 and at Kilroy Airport Center Phases I, II, and III in Long Beach, California which expires in July 2084.

The minimum commitment under our ground leases as of June 30, 2011 for five years and thereafter was as follows:

Year Ending	(in thousands)
Remaining 2011	$	1,041
2012		1,926
2013		1,926
2014		1,870
2015		1,830
Thereafter(1)(2)		133,212
Total	$	141,805

(1)

One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of June 30, 2011.

(2)

One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. Currently gross income does not exceed the threshold requiring us to pay percentage rent. The contractual obligations for that ground lease included above assumes the annual lease rental obligation in effect as of June 30, 2011.

Non-refundable Escrow Deposits

As of June 30, 2011, we had $16.0 million in non-refundable escrow deposits related to potential future acquisitions. These potential future acquisitions are currently anticipated to close in 2011 and are subject to customary closing conditions.

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Fair Value Measurements and Disclosures

6 Months Ended

Jun. 30, 2011

Fair Value Measurements and Disclosures [Abstract]

Fair Value Measurements and Disclosures

12.   Fair Value Measurements and Disclosures

Assets and Liabilities Reported at Fair Value

The only assets and liabilities we record at fair value in our consolidated financial statements are the marketable securities and related deferred compensation plan liability, both of which are related to our Deferred Compensation Plan. The following table sets forth the fair value of our marketable securities and related deferred compensation plan liability as of June 30, 2011 and December 31, 2010:

	Fair Value (Level 1)(1)
Description	June 30, 2011		December 31, 2010
	(in thousands)
Marketable securities(2)	$	5,654	$	4,902
Deferred compensation plan liability(3)	$	5,560	$	4,809

(1)	Based on quoted prices in active markets for identical securities.
(2)	The marketable securities are held in a limited rabbi trust.
(3)	The deferred compensation liability is reported on our consolidated balance sheets in accounts payable, accrued expenses, and other liabilities.

We report the change in the fair value of the marketable securities at the end of each accounting period in interest income and other net investment gains (losses) in the consolidated statements of operations. We adjust the deferred compensation plan liability to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, which results in a corresponding increase or decrease to compensation cost for the period. The following table sets forth the related amounts recorded during the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
Description	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
	(in thousands)
Other net investments gains (losses)	$	26		$	(322	)	$	213		$	(121	)
Compensation cost		(26	)		359			(213	)		158

Financial Instruments Disclosed at Fair Value

The following table sets forth the carrying value and the fair value of our other financial instruments as of June 30, 2011 and December 31, 2010:

	June 30, 2011				December 31, 2010
	Carrying		Fair		Carrying		Fair
Description	Value		Value		Value		Value
	(in thousands)
Liabilities
Secured debt	$	475,820	$	493,185	$	313,009	$	329,456
Exchangeable notes		303,374		324,322		299,964		312,598
Unsecured senior notes		655,929		705,220		655,803		661,644
Credit Facility		245,000		244,757		159,000		159,659

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Segment Disclosure

6 Months Ended

Jun. 30, 2011

Segment Disclosure [Abstract]

Segment Disclosure

13.   Segment Disclosure

We have one reportable segment which is our Office Properties segment and we have one non-reportable segment which is our Industrial Properties segment. We also have certain corporate level activities including legal administration, accounting, finance, management information systems, and acquisitions, which are not considered separate operating segments.

We evaluate the performance of our segments based upon Net Operating Income. “Net Operating Income” is defined as operating revenues (rental income, tenant reimbursements, and other property income) less property and related expenses (property expenses, real estate taxes, ground leases, and provisions for bad debts) and excludes other non-property related income and expenses such as interest income and interest expense, depreciation and amortization, acquisition-related expenses and corporate general and administrative expenses. There is no intersegment activity.

The following tables reconcile our reportable segment activity to our consolidated net income for the three and six months ended June 30, 2011 and 2010 and the assets by segment to the to consolidated assets as of June 30, 2011 and December 31, 2010.

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
				(in thousands)
Reportable Segment—Office Properties
Operating revenues(1)	$	84,560		$	64,718		$	165,379		$	124,321
Property and related expenses		24,729			19,503			47,639			35,757
Net Operating Income		59,831			45,215			117,740			88,564
Non-Reportable Segment—Industrial Properties
Operating revenues(1)		7,504			7,698			14,810			14,914
Property and related expenses		1,811			1,880			5,124			3,650
Net Operating Income		5,693			5,818			9,686			11,264
Total Segments:
Operating revenues(1)		92,064			72,416			180,189			139,235
Property and related expenses		26,540			21,383			52,763			39,407
Net Operating Income	$	65,524		$	51,033		$	127,426		$	99,828
Reconciliation to Consolidated Net Income:
Total Net Operating Income for segments	$	65,524		$	51,033		$	127,426		$	99,828
Unallocated (expenses) income:
General and administrative expenses		(7,440	)		(6,728	)		(14,000	)		(13,823	)
Acquisition-related expenses		(1,194	)		(957	)		(1,666	)		(1,270	)
Depreciation and amortization		(32,248	)		(23,722	)		(61,559	)		(44,660	)
Interest income and other net investment gains (losses)		58			(18	)		242			366
Interest expense		(21,228	)		(13,088	)		(42,104	)		(25,044	)
Loss on early extinguishment of debt		—			(4,564	)		—			(4,564	)
Net income	$	3,472		$	1,956		$	8,339		$	10,833

(1) All operating revenues are comprised of amounts received from third-party tenants.

	June 30, 2011		December 31, 2010
	(in thousands)
Assets:
Reportable Segment — Office Properties
Land, buildings, and improvements, net	$	2,481,829	$	2,108,019
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,027,731		2,611,206
Non-Reportable Segment — Industrial Properties
Land, buildings, and improvements, net		146,155		146,058
Total assets(1)		160,172		159,612
Total Segments
Land, buildings, and improvements, net		2,627,984		2,254,077
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,187,903		2,770,818
Reconciliation to Consolidated Assets:
Total assets allocated to segments	$	3,187,903	$	2,770,818
Other unallocated assets:
Cash and cash equivalents		25,412		14,840
Restricted cash		1,349		1,461
Marketable securities		5,654		4,902
Deferred financing costs, net		18,910		16,447
Prepaid expenses and other assets, net		25,559		8,097
Total consolidated assets	$	3,264,787	$	2,816,565

(1) Includes land, buildings, and improvements, undeveloped land and construction in progress, current receivables, deferred rent receivables deferred leasing costs, and acquisition-related intangible assets, all shown on a net basis.

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Net (Loss) Income Available to Common Stockholders Per Share of the Company

6 Months Ended

Jun. 30, 2011

Net (Loss) Income Available to Common Stockholders Per Share of the Company [Abstract]

Net (Loss) Income Available to Common Stockholders Per Share of the Company

14.   Net (Loss) Income Available to Common Stockholders Per Share of the Company

The following table reconciles the numerator and denominator in computing the Company’s basic and diluted per-share computations for net (loss) income available to common stockholders for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except share and per share amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	3,482		$	2,016		$	8,315		$	10,701
Preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common stockholders		(317	)		(1,783	)		717			3,103
Allocation to participating securities (nonvested shares and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common stockholders	$	(644	)	$	(2,088	)	$	68		$	2,499
Denominator:
Basic weighted average vested shares outstanding		57,685,710			50,296,643			55,008,765			46,674,494
Effect of dilutive securities- Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested shares and common share equivalents outstanding		57,685,710			50,296,643			55,384,729			46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

The effect of the 4.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three and six months ended June 30, 2010 and the effect of the 3.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three and six months ended June 30, 2011 and 2010. The average trading price of the Company’s common stock on the NYSE was below the Exchangeable Notes exchange price for these periods; therefore, these instruments were not considered to be in the money for the purposes of our diluted earnings per share calculation for these periods (See Note 5). Additionally, the effect of the assumed exchange of the 4.25% Exchangeable Notes was not included in the Company’s diluted earnings per share calculation for the three months ended June 30, 2011 as it was anti-dilutive as a result of the net loss available to common stockholders.

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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	58,464,412	52,349,670
Common stock, shares outstanding	58,464,412	52,349,670
Series A Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Preferred stock dividend rate percentage	7.45%	7.45%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series E Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Preferred stock dividend rate percentage	7.80%	7.80%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,610,000	1,610,000
Preferred stock, shares issued	1,610,000	1,610,000
Preferred stock, shares outstanding	1,610,000	1,610,000
Preferred Stock Liquidation preference	$ 40,250	$ 40,250
Series F Cumulative Redeemable Preferred Stock
Preferred stock, $.01 par value, 30,000,000 shares authorized:
Preferred stock dividend rate percentage	7.50%	7.50%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,450,000	3,450,000
Preferred stock, shares issued	3,450,000	3,450,000
Preferred stock, shares outstanding	3,450,000	3,450,000
Preferred Stock Liquidation preference	$ 86,250	$ 86,250

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Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership

6 Months Ended

Jun. 30, 2011

Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership [Abstract]

Net (Loss) Income Available to Common Unitholders per Unit of the Operating Partnership

15.   Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership

The following table reconciles the numerator and denominator in computing the Operating Partnership’s basic and diluted per-unit computations for net (loss) income available to common unitholders for the three and six months ended June 30, 2011 and 2010:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	3,440		$	1,905		$	8,274		$	10,737
Preferred distributions		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common unitholders		(359	)		(1,894	)		676			3,139
Allocation to participating securities (nonvested units and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common unitholders	$	(686	)	$	(2,199	)	$	27		$	2,535
Denominator:
Basic weighted average vested units outstanding		59,407,687			52,019,774			56,731,316			48,397,625
Effect of dilutive securities-Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested units and common unit equivalents outstanding		59,407,687			52,019,774			57,107,280			48,400,981
Basic earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

The effect of the 4.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three and six months ended June 30, 2010 and the effect of the 3.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three and six months ended June 30, 2011 and 2010. The average trading price of the Company’s common stock on the NYSE was below the Exchangeable Notes exchange price for these periods; therefore, these instruments were not considered to be in the money for the purposes of the Operating Partnership’s diluted earnings per unit calculation for these periods (See Note 5). Additionally, the effect of the assumed exchange of the 4.25% Exchangeable Notes was not included in the Operating Partnership’s diluted earnings per unit calculation for the three months ended June 30, 2011 as it was anti-dilutive as a result of the net loss available to common unitholders.

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Subsequent Events

6 Months Ended

Jun. 30, 2011

Subsequent Events [Abstract]

Subsequent Events

16.   Subsequent Events

On July 15, 2011, aggregate dividends, distributions, and dividend equivalents of $21.4 million were paid to common stockholders and common unitholders of record on June 30, 2011 and RSU holders of record on July 15, 2011.

In July 2011, the Operating Partnership issued unsecured senior notes in a public offering with an aggregate principal balance of $325.0 million that are scheduled to mature in July 2018. The unsecured senior notes require semi-annual interest payments each January and July based on a stated annual interest rate of 4.80%. The Company used the net proceeds from this offering for general corporate purposes, including the repayment of borrowings under the Credit Facility.

In July 2011, the Company commenced a “continuous equity” offering program under which it may sell up to an aggregate of $200 million of its common stock from time to time in one or more “at the market” offerings. The Company may sell common stock under this program in amounts and at times to be determined by the Company and the Company has no obligation to sell common stock under this program.

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Pro Forma Results of the Company

6 Months Ended

Jun. 30, 2011

Acquisitions [Abstract]

Pro Forma Results of the Company

17.   Pro Forma Results of the Company

The following pro forma consolidated results of operations of the Company for the three and six months ended June 30, 2011 and 2010 assumes that the acquisition of 601 108th Avenue N.E., Bellevue, WA, was completed as of January 1, 2010. Pro forma data may not be indicative of the results that would have been reported had the acquisition actually occurred as of January 1, 2010, nor does it intend to be a projection of future results.

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common stockholders(2)(3)	$	(585	)	$	(1,544	)	$	(645	)	$	3,876
Net (loss) income available to common stockholders per share—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common stockholders per share—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

The following table summarizes the results of operations for the property at 601 108th Avenue N.E., Bellevue, WA, from June 3, 2011, the date of acquisition, through June 30, 2011:

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

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Pro Forma Results of the Operating Partnership

6 Months Ended

Jun. 30, 2011

Business Acquisition, Equity Interests Issued or Issuable [Line Items]

Pro Forma Results of the Operating Partnership

17.   Pro Forma Results of the Company

The following pro forma consolidated results of operations of the Company for the three and six months ended June 30, 2011 and 2010 assumes that the acquisition of 601 108th Avenue N.E., Bellevue, WA, was completed as of January 1, 2010. Pro forma data may not be indicative of the results that would have been reported had the acquisition actually occurred as of January 1, 2010, nor does it intend to be a projection of future results.

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common stockholders(2)(3)	$	(585	)	$	(1,544	)	$	(645	)	$	3,876
Net (loss) income available to common stockholders per share—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common stockholders per share—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

The following table summarizes the results of operations for the property at 601 108th Avenue N.E., Bellevue, WA, from June 3, 2011, the date of acquisition, through June 30, 2011:

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

Kilroy Realty, L.P. [Member]

Business Acquisition, Equity Interests Issued or Issuable [Line Items]

Pro Forma Results of the Operating Partnership

18.   Pro Forma Results of the Operating Partnership

The following pro forma consolidated results of operations of the Operating Partnership for the three and six months ended June 30, 2011 and 2010 assumes that the acquisition of 601 108th Avenue N.E., Bellevue, WA, was completed as of January 1, 2010. Pro forma data may not be indicative of the results that would have been reported had the acquisition actually occurred as of January 1, 2010, nor does it intend to be a projection of future results.

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common unitholders(2)(3)	$	(632	)	$	(1,650	)	$	(713	)	$	3,932
Net (loss) income available to common unitholders per unit—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common unitholders per unit—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

The following table summarizes the results of operations for the property at 601 108th Avenue N.E., Bellevue, WA, from June 3, 2011, the date of acquisition, through June 30, 2011:

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

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Organization and Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2011

Organization and Basis of Presentation [Abstract]

Consolidation variable interest entities

The consolidated financial statements of the Company and the Operating Partnership also include variable interest entities (“VIE”) in which we are deemed to be the primary beneficiary. As of June 30, 2011, we had one bankruptcy-remote VIE, Kilroy Realty Northside Drive, LLC, which was formed in 2010 to hold three properties that secure the debt we assumed when we acquired the properties in 2010. The assets held by this entity are not available to satisfy the debts and other obligations of the Company or the Operating Partnership.

Segment reporting

Our chief operating decision-makers internally evaluate the operating performance and financial results of our portfolio based on Net Operating Income for the following two segments of commercial real estate property: Office Properties and Industrial Properties. We define “Net Operating Income” as operating revenues (rental income, tenant reimbursements, and other property income) less operating expenses (property expenses, real estate taxes, provision for bad debts, and ground leases).

During the three and six months ended June 30, 2011, the amount of revenues and Net Operating Income generated by our Industrial Properties, in relation to our total consolidated operating portfolio revenues and Net Operating Income, had fallen below the required 10% quantitative reporting thresholds for the Industrial Properties to be considered a reportable segment under GAAP. Therefore, for the three and six months ended June 30, 2011, our only reportable segment is our Office Properties segment. See Note 13 for a reconciliation of our Office Properties segment to our consolidated revenues, Net Operating Income, net income and consolidated assets.

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Organization and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2011

Organization and Basis of Presentation [Abstract]

Summary of stabilized portfolio of operating properties

	Number of		Rentable		Number of
	Buildings		Square Feet		Tenants		Percentage Occupied
Office Properties(1)		107		11,465,821		416		87.9	%
Industrial Properties		40		3,605,407		62		97.6	%
Total Stabilized Portfolio		147		15,071,228		478		90.2	%

(1) Includes eight office properties acquired during the six months ended June 30, 2011 for a total amount of $413.0 million (see Note 2 for additional information).

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Acquisitions (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions [Abstract]

Acquired operating properties from unrelated third parties

							Percentage
							Occupied
					Rentable		as of			Purchase
	Property	Date of	Number of		Square		June 30,			Price
Property	Type	Acquisition	Buildings		Feet		2011			(in millions)(1)
250 Brannan Street San Francisco, CA	Office	January 28, 2011		1		90,742		76.7	%	$	33.0
10210, 10220, and 10230 NE Points Drive; 3933 Lake Washington Boulevard NE Kirkland, WA(2)	Office	April 21, 2011		4		279,924		87.3	%		100.1
10770 Wateridge Circle San Diego, CA	Office	May 12, 2011		1		174,310		97.5	%		32.7
601 108th Avenue N.E. Bellevue, WA	Office	June 3, 2011		1		488,470		89.8	%		215.0
4040 Civic Center Drive San Rafael, CA	Office	June 9, 2011		1		126,787		93.1	%		32.2
Total				8		1,160,233				$	413.0

(1)	Excludes acquisition-related costs.
(2)	In connection with this acquisition, we assumed secured debt with an outstanding principal balance of $30.0 million and a premium of $1.0 million as a result of recording this debt at fair value on the acquisition date (see Note 5).

Fair values of assets acquired and liabilities assumed

	601 108th Avenue		All Other
	N.E., Bellevue, WA(1)		Acquisitions(2)		Total
	(in thousands)
Assets
Land(3)	$	—	$	36,740	$	36,740
Buildings and improvements(4)		214,095		143,545		357,640
Undeveloped land		—		2,560		2,560
Deferred leasing costs and acquisition-related intangible assets(5)		13,790		17,500		31,290
Total assets acquired		227,885		200,345		428,230
Liabilities
Deferred revenue and acquisition-related intangible liabilities(6)		12,850		1,390		14,240
Secured debt(7)		—		30,997		30,997
Accounts payable, accrued expenses and other liabilities		2,380		2,059		4,439
Total liabilities assumed		15,230		34,446		49,676
Net assets and liabilities acquired(8)	$	212,655	$	165,899	$	378,554

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The purchase price of all other acquisitions completed during the six months ended June 30, 2011 were individually less than 5% and in aggregate less than 10% of the Company’s total assets as of December 31, 2010.
(3)	In connection with the acquisition of 601 108th Avenue N.E., Bellevue, WA,, we assumed the lessee obligations under a noncancellable ground lease that is scheduled to expire in November 2093 (see Notes 3 and 11).
(4)	Represents buildings, building improvements, and tenant improvements.
(5)	Represents in-place leases (approximately $18.9 million with a weighted average amortization period of 4.1 years), above-market leases (approximately $6.6 million with a weighted average amortization period of 4.5 years), and unamortized leasing commissions (approximately $5.7 million with a weighted average amortization period of 2.8 years).
(6)	Represents below-market leases (approximately $9.0 million with a weighted average amortization period of 4.3 years) and an above-market ground lease obligation (approximately $5.2 million with a weighted average amortization period of 82.5 years), under which we are the lessee.
(7)	Represents the mortgage loan, which includes an unamortized premium of approximately $1.0 million, assumed in connection with the properties acquired in April 2011 (see Note 5).
(8)	Reflects the purchase price net of assumed secured debt and other lease-related obligations.

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Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net (Tables)

6 Months Ended

Jun. 30, 2011

Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net [Abstract]

Summary of identified deferred leasing costs and acquisition-related intangible assets

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred Leasing Costs and Acquisition-related Intangible Assets, net(1):
Deferred leasing costs	$	131,098		$	128,980
Accumulated amortization		(43,921	)		(45,869	)
Deferred leasing costs, net		87,177			83,111
Above-market leases		27,922			21,321
Accumulated amortization		(4,747	)		(2,163	)
Above-market leases, net		23,175			19,158
In-place leases		50,915			36,964
Accumulated amortization		(8,036	)		(8,167	)
In-place leases, net		42,879			28,797
Total deferred leasing costs and acquisition-related intangible assets, net	$	153,231		$	131,066
Acquisition-related Intangible Liabilities, net(1)(2):
Below-market leases	$	27,152		$	21,938
Accumulated amortization		(2,462	)		(5,094	)
Below-market leases, net		24,690			16,844
Above-market ground lease obligation		5,200			—
Accumulated amortization		(5	)		—
Above-market ground lease obligation, net		5,195			—
Total acquisition-related intangible liabilities, net	$	29,885		$	16,844

(1)

Balances and accumulated amortization amounts at June 30, 2011 reflect the write-off of the following fully amortized amounts at January 1, 2011: deferred leasing costs (approximately $10.4 million), in-place leases (approximately $5.0 million), and below-market leases (approximately $3.8 million). Our accounting policy is to write-off the asset and corresponding accumulated amortization for fully amortized balances on January 1st of each fiscal year.

(2)

Included in deferred revenue and acquisition-related intangible liabilities, net in the consolidated balance sheets.

Amortization for the period related to deferred leasing costs and acquisition-related intangibles

	Three Months Ended
	June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Deferred leasing costs(1)	$	3,970	$	2,968	$	7,738	$	5,673
Net above-market leases(2)		745		60		1,398		32
In-place leases(1)		2,686		267		4,859		285
Above-market ground lease obligation(3)		5		—		5		—
Total	$	7,406	$	3,295	$	14,000	$	5,990

(1)	The amortization of deferred leasing costs and in-place leases is recorded to depreciation and amortization expense in the consolidated statements of operations for the periods presented.
(2)	The amortization of net above-market leases is recorded as a decrease to rental income in the consolidated statements of operations for the periods presented.
(3)	The amortization of the above-market ground lease obligation is recorded as a decrease to ground lease expense in the consolidated statements of operations for the periods presented.

Estimated annual amortization related to deferred leasing costs and acquisition-related intangibles

								Above-Market
	Deferred Leasing		Net Above-/(Below)-			In-Place		Ground Lease
Year Ending	Costs		Market Leases(1)			Leases		Obligation
	(in thousands)
Remaining 2011	$	8,946	$	706		$	6,165	$	32
2012		16,558		1,303			10,766		63
2013		14,751		1,062			8,682		63
2014		13,042		324			6,922		63
2015		9,859		(220	)		3,991		63
Thereafter		24,021		(4,690	)		6,353		4,911
Total	$	87,177	$	(1,515	)	$	42,879	$	5,195

(1) Represents estimated annual net amortization related to above-/(below)-market leases. Amounts shown for 2011-2014 represent net above-market leases which will be recorded as a decrease to rental income in the consolidated statement of operations, and amounts shown for the periods 2015 and thereafter represent net below-market leases which will be recorded as an increase to rental income in the consolidated statement of operations.

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Receivables (Tables)

6 Months Ended

Jun. 30, 2011

Receivables [Abstract]

Current Receivables, net

	June 30,			December 31,
	2011			2010
	(in thousands)
Current receivables	$	7,655		$	9,077
Allowance for uncollectible tenant receivables		(2,923	)		(2,819	)
Current receivables, net	$	4,732		$	6,258

Deferred Rent Receivables, net

	June 30,			December 31,
	2011			2010
	(in thousands)
Deferred rent receivables	$	101,780		$	92,883
Allowance for deferred rent receivables		(3,822	)		(3,831	)
Deferred rent receivables, net	$	97,958		$	89,052

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Secured and Unsecured Debt of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2011

Secured and Unsecured Debt of the Operating Partnership [Abstract]

Balance and significant terms of the exchangeable notes outstanding

	3.25% Exchangeable Notes						4.25% Exchangeable Notes
	June 30,			December 31,			June 30,			December 31,
	2011			2010			2011			2010
	(in thousands)
Principal amount	$	148,000		$	148,000		$	172,500		$	172,500
Unamortized discount		(2,485	)		(4,004	)		(14,641	)		(16,532	)
Net carrying amount of liability component	$	145,515		$	143,996		$	157,859		$	155,968
Carrying amount of equity component	$33,675						$19,835
Maturity date	April 2012						November 2014
Stated coupon rate	3.25%(1)						4.25%(2)
Effective interest rate(3)	5.45%						7.13%
Exchange rate per $1,000 principal value of the Exchangeable Notes, as adjusted(4)	11.3636						27.8307
Exchange price, as adjusted(4)	$88.00						$35.93
Number of shares on which the aggregate consideration to be delivered on conversion is determined(4)	1,681,813						4,800,796

(1)	Interest on the 3.25% Exchangeable Notes is payable semi-annually in arrears on April 15th and October 15th of each year.
(2)	Interest on the 4.25% Exchangeable Notes is payable semi-annually in arrears on May 15th and November 15th of each year.
(3)	The rate at which we record interest expense for financial reporting purposes, which reflects the amortization of the discounts on the Exchangeable Notes. This rate represents our conventional debt borrowing rate at the date of issuance.
(4)	The exchange rate, exchange price, and the number of shares to be delivered upon conversion are subject to adjustment under certain circumstances including increases in our common dividends.

Capped call Transactions

	3.25% Exchangeable Notes(1)		4.25% Exchangeable Notes(2)
Referenced shares of common stock		1,121,201		4,800,796
Exchange price including effect of capped calls		$102.72		$42.81

(1)	The capped calls mitigate the dilutive impact to us of the potential exchange of two-thirds of the 3.25% Exchangeable Notes into shares of common stock.
(2)	The capped calls mitigate the dilutive impact to us of the potential exchange of all of the 4.25% Exchangeable Notes into shares of common stock.

Per share average trading price of Company's common stock on New York Stock Exchange

	Three Months Ended		Six Months Ended
	June 30, 2011		June 30, 2011
Average Trading Price of the Company’s Stock	$	39.90	$	38.94

Interest expense for the exchangeable notes

	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands)
Contractual interest payments	$	3,035	$	4,241	$	6,070	$	8,495
Amortization of discount		1,722		2,372		3,410		4,679
Interest expense attributable to the Exchangeable Notes	$	4,757	$	6,613	$	9,480	$	13,174

Terms of the Credit Facility

	June 30,		December 31,
	2011		2010
	(in thousands)
Outstanding borrowings	$	245,000	$	159,000
Remaining borrowing capacity		255,000		341,000
Total borrowing capacity(1)	$	500,000	$	500,000
Interest rate(2)		2.87%		2.99%
Facility fee-annual rate(3)		0.350%		0.575%
Maturity date(4)		August 2015		August 2013

(1)	We may elect to borrow, subject to lender approval, up to an additional $200 million under an accordion feature under the terms of the Credit Facility.
(2)	The Credit Facility interest rate included interest at an annual rate of LIBOR plus 1.750% and 2.675% as of June 30, 2011 and December 31, 2010, respectively.
(3)	The facility fee is paid on a quarterly basis and is calculated based on the total borrowing capacity. In addition to the facility fee, we also incurred debt origination and legal costs of approximately $5.0 million when we entered into the Credit Facility in 2010 and an additional $3.3 million when we amended the Credit Facility in 2011. The unamortized balance of these costs will be amortized as additional interest expense over the extended term of the Credit Facility.
(4)	Under the terms of the Credit Facility, we may exercise an option to extend the maturity date by one year.

Stated debt maturities and scheduled amortization payments, excluding debt discounts

Year Ending	(in thousands)
Remaining 2011	$	72,262
2012		305,303
2013		6,373
2014		262,443
2015		602,382
Thereafter		450,028
Total	$	1,698,791	(1)

(1) Includes gross principal balance of outstanding debt before impact of all debt discounts and premiums.

Capitalized interest and loan fees

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(in thousands)
Gross interest expense	$	23,293		$	15,897		$	46,148		$	30,437
Capitalized interest		(2,065	)		(2,809	)		(4,044	)		(5,393	)
Interest expense	$	21,228		$	13,088		$	42,104		$	25,044

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Consolidated Balance Sheets (KILROY REALTY, L.P.) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
REAL ESTATE ASSETS:
Land and improvements (Note 2)	$ 528,082	$ 491,333
Buildings and improvements (Note 2)	2,820,766	2,435,173
Undeveloped land and construction in progress	303,998	290,365
Total real estate held for investment	3,652,846	3,216,871
Accumulated depreciation and amortization	(720,864)	(672,429)
Total real estate assets, net	2,931,982	2,544,442
CASH AND CASH EQUIVALENTS	25,412	14,840
RESTRICTED CASH	1,349	1,461
MARKETABLE SECURITIES (Note 12)	5,654	4,902
CURRENT RECEIVABLES, NET (Note 4)	4,732	6,258
DEFERRED RENT RECEIVABLES, NET (Note 4)	97,958	89,052
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)	153,231	131,066
DEFERRED FINANCING COSTS, NET (Note 5)	18,910	16,447
PREPAID EXPENSES AND OTHER ASSETS, NET	25,559	8,097
TOTAL ASSETS	3,264,787	2,816,565
LIABILITIES:
Secured debt, net (Notes 5 and 12)	475,820	313,009
Exchangeable senior notes, net (Notes 5 and 12)	303,374	299,964
Unsecured senior notes, net (Notes 5 and 12)	655,929	655,803
Unsecured line of credit (Notes 5 and 12)	245,000	159,000
Accounts payable, accrued expenses and other liabilities	66,664	68,525
Accrued distributions (Note 16)	22,563	20,385
Deferred revenue and acquisition-related intangible liabilities, net (Note 3)	90,149	79,322
Rents received in advance and tenant security deposits	28,117	29,189
Total liabilities	1,887,616	1,625,197
COMMITMENTS AND CONTINGENCIES (Note 11)
7.45% SERIES A CUMULATIVE REDEEMABLE PREFERRED UNITS	73,638	73,638
Partners' Capital (Note 8):
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND EQUITY/CAPITAL	3,264,787	2,816,565
Kilroy Realty, L.P. [Member]
REAL ESTATE ASSETS:
Land and improvements (Note 2)	528,082	491,333
Buildings and improvements (Note 2)	2,820,766	2,435,173
Undeveloped land and construction in progress	303,998	290,365
Total real estate held for investment	3,652,846	3,216,871
Accumulated depreciation and amortization	(720,864)	(672,429)
Total real estate assets, net	2,931,982	2,544,442
CASH AND CASH EQUIVALENTS	25,412	14,840
RESTRICTED CASH	1,349	1,461
MARKETABLE SECURITIES (Note 12)	5,654	4,902
CURRENT RECEIVABLES, NET (Note 4)	4,732	6,258
DEFERRED RENT RECEIVABLES, NET (Note 4)	97,958	89,052
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Notes 2 and 3)	153,231	131,066
DEFERRED FINANCING COSTS, NET (Note 5)	18,910	16,447
PREPAID EXPENSES AND OTHER ASSETS, NET	25,559	8,097
TOTAL ASSETS	3,264,787	2,816,565
LIABILITIES:
Secured debt, net (Notes 5 and 12)	475,820	313,009
Exchangeable senior notes, net (Notes 5 and 12)	303,374	299,964
Unsecured senior notes, net (Notes 5 and 12)	655,929	655,803
Unsecured line of credit (Notes 5 and 12)	245,000	159,000
Accounts payable, accrued expenses and other liabilities	66,664	68,525
Accrued distributions (Note 16)	22,563	20,385
Deferred revenue and acquisition-related intangible liabilities, net (Note 3)	90,149	79,322
Rents received in advance and tenant security deposits	28,117	29,189
Total liabilities	1,887,616	1,625,197
COMMITMENTS AND CONTINGENCIES (Note 11)
7.45% SERIES A CUMULATIVE REDEEMABLE PREFERRED UNITS	73,638	73,638
Partners' Capital (Note 8):
Common units, 58,464,412 and 52,349,670 held by the general partner and 1,718,131 and 1,723,131 held by common limited partners issued and outstanding, respectively	1,180,249	994,511
Total Partners' Capital	1,301,831	1,116,093
Noncontrolling interests in consolidated subsidiaries	1,702	1,637
Total capital	1,303,533	1,117,730
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND EQUITY/CAPITAL	3,264,787	2,816,565
Kilroy Realty, L.P. [Member] | Series E Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):
Cumulative Redeemable Preferred stock	38,425	38,425
Kilroy Realty, L.P. [Member] | Series F Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):
Cumulative Redeemable Preferred stock	83,157	83,157
Series E Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):
Cumulative Redeemable Preferred stock	38,425	38,425
Series F Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):
Cumulative Redeemable Preferred stock	$ 83,157	$ 83,157

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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Share-Based Compensation [Abstract]

Summary of nonvested shares

				Weighted-
				Average
				Grant Date
				Fair Value
Nonvested Shares	Shares			Per Share
Outstanding at January 1, 2011		50,032		$	58.40
Granted		68,727			37.83
Vested(1)		(9,474	)		56.76
Outstanding as of June 30, 2011		109,285		$	45.61

(1) The total shares vested include 2,198 shares that were then tendered to satisfy minimum statutory tax withholding requirements related to the restricted shares that have vested in accordance with the terms of the 2006 Plan. We accept the return of shares at the current quoted market price of the Company’s common stock to satisfy tax obligations.

Summary of nonvested and vested shares

	Shares Granted				Shares Vested
			Weighted-Average
			Grant Date					Total Vest Date
	Non-Vested Shares		Fair Value					Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested Shares			(in thousands)
2011		68,727	$	37.83		(9,474	)	$	370
2010		3,239		30.88		(16,358	)		474

(1) Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

Summary of Restricted Stock Units

	Nonvested RSUs
				Weighted-Average
				Grant Date
				Fair Value
	Amount			Per Share		Vested RSUs			Total RSUs
Outstanding at January 1, 2011		125,754		$	29.88		588,068			713,822
Granted		107,673			37.94		—			107,673
Vested		(23,035	)		30.57		23,035			—
Issuance of dividend equivalents(1)							13,494			13,494
Canceled(2)							(8,448	)		(8,448	)
Outstanding as of June 30, 2011		210,392		$	33.93		616,149			826,541

(1)	RSUs issued as dividend equivalents are vested upon issuance.
(2)	We accept the return of RSUs, at the current quoted market price of the Company’s common stock, to satisfy minimum statutory tax-withholding requirements related to either RSUs that have vested or RSU dividend equivalents in accordance with the terms of the 2006 Plan.

Summary of Nonvested and Vested Restricted Stock Units

A summary of our RSU activity for the six months ended June 30, 2011 and 2010 is presented below:

	RSUs Granted				RSUs Vested
			Weighted-Average
			Grant Date				Total Vest-Date
	Non-Vested RSUs		Fair Value				Fair Value(1)
Six Months Ended June 30,	Issued		Per Share		Vested RSUs		(in thousands)
2011		107,673	$	37.94		23,035	$	897
2010		159,606		30.24		23,564		740

(1) Total fair value of RSUs vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the day of vesting.

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Future Minimum Rent (Tables)

6 Months Ended

Jun. 30, 2011

Future Minimum Rent [Abstract]

Future contractual minimum rent under operating lease

Year Ending	(in thousands)
Remaining 2011	$	153,705
2012		313,019
2013		293,621
2014		263,342
2015		210,150
Thereafter		658,754
Total	$	1,892,591

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies [Abstract]

Summary of minimum commitment

Year Ending	(in thousands)
Remaining 2011	$	1,041
2012		1,926
2013		1,926
2014		1,870
2015		1,830
Thereafter(1)(2)		133,212
Total	$	141,805

(1)

One of our ground lease obligations is subject to a fair market value adjustment every five years; however, the lease includes ground rent subprotection and infrastructure rent credits which currently limit our annual rental obligations to $1.0 million. The contractual obligations for that ground lease included above assumes the lesser of $1.0 million or annual lease rental obligation in effect as of June 30, 2011.

(2)

One of our ground lease obligations includes a component which is based on the percentage of gross income that exceeds the minimum ground rent. The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years. Currently gross income does not exceed the threshold requiring us to pay percentage rent. The contractual obligations for that ground lease included above assumes the annual lease rental obligation in effect as of June 30, 2011.

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Fair Value Measurements and Disclosures (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value Measurements and Disclosures [Abstract]

Fair value of the company's marketable securities

	Fair Value (Level 1)(1)
Description	June 30, 2011		December 31, 2010
	(in thousands)
Marketable securities(2)	$	5,654	$	4,902
Deferred compensation plan liability(3)	$	5,560	$	4,809

(1)	Based on quoted prices in active markets for identical securities.
(2)	The marketable securities are held in a limited rabbi trust.
(3)	The deferred compensation liability is reported on our consolidated balance sheets in accounts payable, accrued expenses, and other liabilities.

Fair value adjustment of marketable securities and deferred compensation plan liability

	Three Months Ended						Six Months Ended
Description	June 30, 2011			June 30, 2010			June 30, 2011			June 30, 2010
	(in thousands)
Other net investments gains (losses)	$	26		$	(322	)	$	213		$	(121	)
Compensation cost		(26	)		359			(213	)		158

Carrying value and fair value of company's remaining financial assets and liabilities

	June 30, 2011				December 31, 2010
	Carrying		Fair		Carrying		Fair
Description	Value		Value		Value		Value
	(in thousands)
Liabilities
Secured debt	$	475,820	$	493,185	$	313,009	$	329,456
Exchangeable notes		303,374		324,322		299,964		312,598
Unsecured senior notes		655,929		705,220		655,803		661,644
Credit Facility		245,000		244,757		159,000		159,659

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Segment Disclosure (Tables)

6 Months Ended

Jun. 30, 2011

Segment Disclosure [Abstract]

Reconciliation of operating profit loss to consolidated and segment information by segment

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
				(in thousands)
Reportable Segment—Office Properties
Operating revenues(1)	$	84,560		$	64,718		$	165,379		$	124,321
Property and related expenses		24,729			19,503			47,639			35,757
Net Operating Income		59,831			45,215			117,740			88,564
Non-Reportable Segment—Industrial Properties
Operating revenues(1)		7,504			7,698			14,810			14,914
Property and related expenses		1,811			1,880			5,124			3,650
Net Operating Income		5,693			5,818			9,686			11,264
Total Segments:
Operating revenues(1)		92,064			72,416			180,189			139,235
Property and related expenses		26,540			21,383			52,763			39,407
Net Operating Income	$	65,524		$	51,033		$	127,426		$	99,828
Reconciliation to Consolidated Net Income:
Total Net Operating Income for segments	$	65,524		$	51,033		$	127,426		$	99,828
Unallocated (expenses) income:
General and administrative expenses		(7,440	)		(6,728	)		(14,000	)		(13,823	)
Acquisition-related expenses		(1,194	)		(957	)		(1,666	)		(1,270	)
Depreciation and amortization		(32,248	)		(23,722	)		(61,559	)		(44,660	)
Interest income and other net investment gains (losses)		58			(18	)		242			366
Interest expense		(21,228	)		(13,088	)		(42,104	)		(25,044	)
Loss on early extinguishment of debt		—			(4,564	)		—			(4,564	)
Net income	$	3,472		$	1,956		$	8,339		$	10,833

(1) All operating revenues are comprised of amounts received from third-party tenants.

	June 30, 2011		December 31, 2010
	(in thousands)
Assets:
Reportable Segment — Office Properties
Land, buildings, and improvements, net	$	2,481,829	$	2,108,019
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,027,731		2,611,206
Non-Reportable Segment — Industrial Properties
Land, buildings, and improvements, net		146,155		146,058
Total assets(1)		160,172		159,612
Total Segments
Land, buildings, and improvements, net		2,627,984		2,254,077
Undeveloped land and construction in progress		303,998		290,365
Total assets(1)		3,187,903		2,770,818
Reconciliation to Consolidated Assets:
Total assets allocated to segments	$	3,187,903	$	2,770,818
Other unallocated assets:
Cash and cash equivalents		25,412		14,840
Restricted cash		1,349		1,461
Marketable securities		5,654		4,902
Deferred financing costs, net		18,910		16,447
Prepaid expenses and other assets, net		25,559		8,097
Total consolidated assets	$	3,264,787	$	2,816,565

(1) Includes land, buildings, and improvements, undeveloped land and construction in progress, current receivables, deferred rent receivables deferred leasing costs, and acquisition-related intangible assets, all shown on a net basis.

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Net (Loss) Income Available to Common Stockholders Per Share of the Company (Tables)

6 Months Ended

Jun. 30, 2011

Net (Loss) Income Available to Common Stockholders Per Share of the Company [Abstract]

Net (loss) income available to common stockholders

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except share and per share amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	3,482		$	2,016		$	8,315		$	10,701
Preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common stockholders		(317	)		(1,783	)		717			3,103
Allocation to participating securities (nonvested shares and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common stockholders	$	(644	)	$	(2,088	)	$	68		$	2,499
Denominator:
Basic weighted average vested shares outstanding		57,685,710			50,296,643			55,008,765			46,674,494
Effect of dilutive securities- Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested shares and common share equivalents outstanding		57,685,710			50,296,643			55,384,729			46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

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Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2011

Net Income Available To Common Unitholders [Line Items]

Net (loss) income available to common stockholders

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except share and per share amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	3,482		$	2,016		$	8,315		$	10,701
Preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common stockholders		(317	)		(1,783	)		717			3,103
Allocation to participating securities (nonvested shares and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common stockholders	$	(644	)	$	(2,088	)	$	68		$	2,499
Denominator:
Basic weighted average vested shares outstanding		57,685,710			50,296,643			55,008,765			46,674,494
Effect of dilutive securities- Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested shares and common share equivalents outstanding		57,685,710			50,296,643			55,384,729			46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

Operating Partnership [Member]

Net Income Available To Common Unitholders [Line Items]

Net (loss) income available to common stockholders

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	3,440		$	1,905		$	8,274		$	10,737
Preferred distributions		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common unitholders		(359	)		(1,894	)		676			3,139
Allocation to participating securities (nonvested units and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common unitholders	$	(686	)	$	(2,199	)	$	27		$	2,535
Denominator:
Basic weighted average vested units outstanding		59,407,687			52,019,774			56,731,316			48,397,625
Effect of dilutive securities-Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested units and common unit equivalents outstanding		59,407,687			52,019,774			57,107,280			48,400,981
Basic earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

XML



Pro Forma Results of the Company (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions [Abstract]

Pro forma consolidated results of operations of the company

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common stockholders(2)(3)	$	(585	)	$	(1,544	)	$	(645	)	$	3,876
Net (loss) income available to common stockholders per share—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common stockholders per share—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

Actual results for certain operating data for the property

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

XML



Pro Forma Results of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2011

Pro forma results of the operating partnership

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common stockholders(2)(3)	$	(585	)	$	(1,544	)	$	(645	)	$	3,876
Net (loss) income available to common stockholders per share—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common stockholders per share—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

Actual results for certain operating data for the property

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

Kilroy Realty, L.P. [Member]

Pro forma results of the operating partnership

	Three Months Ended(1)						Six Months Ended(1)
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands except per share amounts)
Revenues	$	95,050		$	76,981		$	187,478		$	148,282
Net (loss) income available to common unitholders(2)(3)	$	(632	)	$	(1,650	)	$	(713	)	$	3,932
Net (loss) income available to common unitholders per unit—basic(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07
Net (loss) income available to common unitholders per unit—diluted(2)(3)	$	(0.02	)	$	(0.04	)	$	(0.02	)	$	0.07

(1)	The purchase of 601 108th Avenue N.E., Bellevue, WA, represents the largest acquisition and 52.1% of the total aggregate purchase price of the properties acquired during the six months ended June 30, 2011.
(2)	The pro forma earnings for the three and six months ended June 30, 2011 were adjusted to exclude non-recurring, acquisition-related expenses of $0.3 million incurred in 2011 for 601 108th Avenue N.E., Bellevue, WA. The pro forma data for the three and six months ended June 30, 2010 were adjusted to include these charges.
(3)	The pro forma earnings for all periods presented includes incremental interest expense associated with the pro forma borrowings under the Credit Facility. The pro forma interest expense estimate is calculated based on the applicable interest rate. Actual funding of the acquisition may be from different sources and the pro forma borrowing and related pro forma interest expense estimate assumed herein are not indicative of actual results.

Actual results for certain operating data for the property

	(in thousands)
Revenues	$	1,425
Net income(1)		7

(1) Reflects the net operating income less depreciation for this property and amortization of acquisition-related intangibles.

XML



Organization and Basis of Presentation (Details)	Jun. 30, 2011
Summary of stabilized portfolio of operating properties
Number of Buildings	8
Stabilized Portfolio [Member]
Summary of stabilized portfolio of operating properties
Number of Buildings	147
Rentable square feet	15,071,228
Number of Tenants	478
Percentage Occupied	90.20%
Stabilized Portfolio [Member] | Industrial Properties [Member]
Summary of stabilized portfolio of operating properties
Number of Buildings	40
Rentable square feet	3,605,407
Number of Tenants	62
Percentage Occupied	97.60%
Stabilized Portfolio [Member] | Office Properties [Member]
Summary of stabilized portfolio of operating properties
Number of Buildings	107
Rentable square feet	11,465,821
Number of Tenants	416
Percentage Occupied	87.90%
Office Properties [Member]
Summary of stabilized portfolio of operating properties
Number of Buildings	8

XML



Consolidated Balance Sheets (KILROY REALTY, L.P.) (Parenthetical) (Kilroy Realty, L.P. [Member], USD $) In Thousands, except Share data, unless otherwise specified			6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Series E Cumulative Redeemable Preferred Stock	Dec. 31, 2010 Series E Cumulative Redeemable Preferred Stock	Jun. 30, 2011 Series F Cumulative Redeemable Preferred Stock	Dec. 31, 2010 Series F Cumulative Redeemable Preferred Stock
Partners' Capital (Note 8):
Preferred stock dividend rate percentage			7.80%	7.80%	7.50%	7.50%
Preferred stock, shares outstanding			1,610,000	1,610,000	3,450,000	3,450,000
Preferred Stock Liquidation preference			$ 40,250	$ 40,250	$ 86,250	$ 86,250
General partner, units issued	58,464,412	52,349,670
General partners, units outstanding	58,464,412	52,349,670
Limited partners, units issued	1,718,131	1,723,131
Limited partnership units outstanding	1,718,131	1,723,131

XML



Organization and Basis of Presentation (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Buildings	8	8
Organization and Basis of Presentation Details (Textuals) [Abstract]
Cost of Buildings	$ 413.0	$ 413.0
Number of properties of the company in Washington	6	6
Stabilized Occupancy		95.00%
Lease-up properties	0	0
Years single tenant occupied property under redevelopment		25 years
Office space under redevelopment		300,000
Office space under committed redevelopment	98,000	98,000
Percentage of general partnership interest owned by the company in the Operating Partnership	97.10%	97.10%	96.80%	96.70%
Percentage of Common limited partnership interest owned by certain non-affiliated investors and certain directors and officers of the Company in the Operating Partnership	2.90%	2.90%	3.20%	3.30%
Percentage of General partnership interest owned by wholly-owned subsidiary of the Company	1.00%	1.00%
Percentage of limited partnership interest owned by Operating Partnership	99.00%	99.00%
Threshhold limits for segment reporting	10.00%	10.00%
2355, 2365, 2375 Northside Drive San Diego, CA [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Buildings	3	3
Office Properties [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of Buildings	8	8

XML



Acquisitions (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Acquired operating properties from unrelated third parties
Number of Buildings	8
Rentable Square Feet	1,160,233
Purchase Price	$ 413,000,000
Assets
Buildings and improvements	357,640,000
Land	36,740,000
Undeveloped land	2,560,000
Deferred leasing costs and acquisition-related intangible assets	31,290,000
Total assets acquired	428,230,000
Liabilities
Deferred revenue and acquisition-related intangible liabilities	14,240,000
Secured debt	30,997,000
Accounts payable, accrued expenses and other liabilities	4,439,000
Total liabilities assumed	49,676,000
Net assets and liabilities acquired	378,554,000
Office Properties [Member]
Acquired operating properties from unrelated third parties
Number of Buildings	8
Office Properties [Member] | 250 Brannan Street San Francisco, CA [Member]
Acquired operating properties from unrelated third parties
Date of Acquisition	January 28, 2011
Number of Buildings	1
Rentable Square Feet	90,742
Percentage Occupied	76.70%
Purchase Price	33,000,000
Office Properties [Member] | 10210, 10220, and 1023 NE Points Drive; 3933 Lake Washington Boulevard NE Kirkland, WA [Member]
Acquired operating properties from unrelated third parties
Date of Acquisition	April 21, 2011
Number of Buildings	4
Rentable Square Feet	279,924
Percentage Occupied	87.30%
Purchase Price	100,100,000
Office Properties [Member] | 10770 Wateridge Circle San Diego, CA [Member]
Acquired operating properties from unrelated third parties
Date of Acquisition	May 12, 2011
Number of Buildings	1
Rentable Square Feet	174,310
Percentage Occupied	97.50%
Purchase Price	32,700,000
Office Properties [Member] | 601 108th Avenue N.E Bellevue, WA [Member]
Acquired operating properties from unrelated third parties
Date of Acquisition	June 3, 2011
Number of Buildings	1
Rentable Square Feet	488,470
Percentage Occupied	89.80%
Purchase Price	215,000,000
Office Properties [Member] | 4040 Civic Center Drive San Rafael, CA [Member]
Acquired operating properties from unrelated third parties
Date of Acquisition	June 9, 2011
Number of Buildings	1
Rentable Square Feet	126,787
Percentage Occupied	93.10%
Purchase Price	32,200,000
601 108th Avenue N.E Bellevue, WA [Member]
Assets
Buildings and improvements	214,095,000
Land	0
Undeveloped land	0
Deferred leasing costs and acquisition-related intangible assets	13,790,000
Total assets acquired	227,885,000
Liabilities
Deferred revenue and acquisition-related intangible liabilities	12,850,000
Secured debt	0
Accounts payable, accrued expenses and other liabilities	2,380,000
Total liabilities assumed	15,230,000
Net assets and liabilities acquired	212,655,000
All Other Acquisitions [Member]
Assets
Buildings and improvements	143,545,000
Land	36,740,000
Undeveloped land	2,560,000
Deferred leasing costs and acquisition-related intangible assets	17,500,000
Total assets acquired	200,345,000
Liabilities
Deferred revenue and acquisition-related intangible liabilities	1,390,000
Secured debt	30,997,000
Accounts payable, accrued expenses and other liabilities	2,059,000
Total liabilities assumed	34,446,000
Net assets and liabilities acquired	$ 165,899,000

XML



Acquisitions (Details Textuals) (USD $)	6 Months Ended
	Jun. 30, 2011
Aquisitions (Textuals) [Abstract]
Deferred revenue and acquisition-related intangible liabilities	$ 14,240,000
Purchase price for acquisitions of 601 108th Avenue N.E. Bellevue, WA as percentage of total purchase price of all acquisitions	52.10%
Deferred leasing costs and acquisition-related intangible assets	31,290,000
Assumed noncancellable ground lease expiration	Nov. 30, 2093
4.94%Mortgage Payable due April 15, 2015 [Member]
Aquisitions (Textuals) [Abstract]
Secured debt, net (Notes 5 and 12)	30,000,000
Initial premium on outstanding amount of secured debt	1,000,000
Leases Acquired In Place [Member]
Aquisitions (Textuals) [Abstract]
Deferred leasing costs and acquisition-related intangible assets	18,900,000
Weighted average amortization period in years	4.1
Leases Acquired in Place Above Market Adjustment [Member]
Aquisitions (Textuals) [Abstract]
Deferred leasing costs and acquisition-related intangible assets	6,600,000
Weighted average amortization period in years	4.5
Deferred Leasing Costs [Member]
Aquisitions (Textuals) [Abstract]
Deferred leasing costs and acquisition-related intangible assets	5,700,000
Weighted average amortization period in years	2.8
Leases Acquired In Place Below Market Adjustment [Member]
Aquisitions (Textuals) [Abstract]
Deferred revenue and acquisition-related intangible liabilities	9,000,000
Weighted average amortization period in years	4.3
Above Market Ground Lease [Member]
Aquisitions (Textuals) [Abstract]
Deferred revenue and acquisition-related intangible liabilities	5,200,000
Weighted average amortization period in years	82.5
All Other Acquisitions [Member]
Aquisitions (Textuals) [Abstract]
Deferred revenue and acquisition-related intangible liabilities	1,390,000
Initial premium on outstanding amount of secured debt	1,000,000
Purchase price of each acquisition as percentage of company's total assets	Less than 5%
Purchase price of each acquisition as percentage of company's total assets	Less than 10%
Deferred leasing costs and acquisition-related intangible assets	$ 17,500,000

XML



Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisitions-related intangible liabilities, net	$ 29,885	$ 16,844
Total deferred leasing costs and acquisition-related intangible assets, net	153,231	131,066
Deferred Leasing Costs [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisiition-related intangible liabilities, net	131,098	128,980
Accumulated amortization	(43,921)	(45,869)
Finite-lived intangible assets, net	87,177	83,111
Leases Acquired in Place Above Market Adjustment [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisiition-related intangible liabilities, net	27,922	21,321
Accumulated amortization	(4,747)	(2,163)
Finite-lived intangible assets, net	23,175	19,158
Leases Acquired In Place [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisiition-related intangible liabilities, net	50,915	36,964
Accumulated amortization	(8,036)	(8,167)
Finite-lived intangible assets, net	42,879	28,797
Leases Acquired In Place Above Market Ground Leases Adjustment [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisiition-related intangible liabilities, net	5,200	0
Accumulated amortization	(5)	0
Finite-lived intangible assets, net	5,195	0
Leases Acquired In Place Below Market Adjustment [Member]
Deferred Leasing Costs and Acquisition-related Intangible Assets
Total acquisiition-related intangible liabilities, net	27,152	21,938
Accumulated amortization	(2,462)	(5,094)
Finite-lived intangible assets, net	$ 24,690	$ 16,844

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Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net (Details 1) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	$ 7,406	$ 3,295	$ 14,000	$ 5,990
Deferred Leasing Costs [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	3,970	2,968	7,738	5,673
Estimated annual amortization related to acquisition-related intangibles
Remaining 2011			8,946
2012			16,558
2013			14,751
2014			13,042
2015			9,859
Thereafter			24,021
Total			87,177
Net Above (Below)-Market Leases [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	745	60	1,398	32
Estimated annual amortization related to acquisition-related intangibles
Remaining 2011			706
2012			1,303
2013			1,062
2014			324
2015			(220)
Thereafter			(4,690)
Total			(1,515)
Leases Acquired In Place [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	2,686	267	4,859	285
Estimated annual amortization related to acquisition-related intangibles
Remaining 2011			6,165
2012			10,766
2013			8,682
2014			6,922
2015			3,991
Thereafter			6,353
Total			42,879
Leases Acquired In Place Above Market Ground Leases Adjustment [Member]
Amortization for the period related to deferred leasing costs and acquisition-related intangibles
Amortization for the period related to deferred leasing costs and acquisition-related intangibles	5	0	5	0
Estimated annual amortization related to acquisition-related intangibles
Remaining 2011			32
2012			63
2013			63
2014			63
2015			63
Thereafter			4,911
Total			$ 5,195

XML



Deferred Leasing Costs and Acquisition-related Intangibles Assets and Liabilities, net (Details Textuals) (USD $) In Millions	Jun. 30, 2011
Deferred Leasing Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Fully amortized deferred leasing costs and intangibles	$ 10.4
Leases Acquired In Place [Member]
Finite-Lived Intangible Assets [Line Items]
Fully amortized deferred leasing costs and intangibles	5.0
Leases Acquired In Place Below Market Adjustment [Member]
Finite-Lived Intangible Assets [Line Items]
Fully amortized deferred leasing costs and intangibles	$ 3.8

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Receivables (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current Receivables, net
Current receivables	$ 7,655	$ 9,077
Allowance for uncollectible tenant receivables	(2,923)	(2,819)
Current receivables, net	4,732	6,258
Deferred Rent Receivables, net
Deferred rent receivables	101,780	92,883
Allowance for deferred rent receivables	(3,822)	(3,831)
Deferred rent receivables, net	$ 97,958	$ 89,052

XML



Secured and Unsecured Debt of the Operating Partnership (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Balance and significant terms of the Exchangeable Notes outstanding
Net carrying amount of liability component	$ 303,374,000	$ 303,374,000	$ 299,964,000
Maturity Date			Nov. 15, 2014
Interest rate on exchangeable notes				3.25%
Exchange price, as adjusted	$ 35.93	$ 35.93		$ 35.93
Per share average trading price of Company's common stock on New York Stock Exchange
Average Trading Price of the Company's Stock	$ 39.90	$ 38.94
Exchangeable Notes [Member] | Operating Partnership [Member] | 3.25% Exchangeable Notes [Member]
Balance and significant terms of the Exchangeable Notes outstanding
Principal amount	148,000,000	148,000,000	148,000,000
Unamortized discount	(2,485,000)	(2,485,000)	(4,004,000)
Net carrying amount of liability component	145,515,000	145,515,000	143,996,000
Carrying amount of equity component	33,675,000	33,675,000	33,675,000
Maturity Date		Apr. 15, 2012	Apr. 15, 2012
Interest rate on exchangeable notes	3.25%	3.25%	3.25%
Effective interest rate	5.45%	5.45%	5.45%
Exchange rate per $1,000 principal value of the Exchangeable Notes, as adjusted		11.3636	11.3636
Exchange price, as adjusted	$ 88.00	$ 88.00	$ 88.00
Number of Shares on which aggregate consideration to be delivered upon conversion is determined		1,681,813	1,681,813
Exchangeable Notes [Member] | Operating Partnership [Member] | 4.25% Exchangeable Notes [Member]
Balance and significant terms of the Exchangeable Notes outstanding
Principal amount	172,500,000	172,500,000	172,500,000
Unamortized discount	(14,641,000)	(14,641,000)	(16,532,000)
Net carrying amount of liability component	157,859,000	157,859,000	155,968,000
Carrying amount of equity component	19,835,000	19,835,000	19,835,000
Maturity Date		Nov. 15, 2014	Nov. 15, 2014
Interest rate on exchangeable notes	4.25%	4.25%	4.25%
Effective interest rate	7.13%	7.13%	7.13%
Exchange rate per $1,000 principal value of the Exchangeable Notes, as adjusted		27.8307	27.8307
Exchange price, as adjusted	$ 35.93	$ 35.93	$ 35.93
Number of Shares on which aggregate consideration to be delivered upon conversion is determined		4,800,796	4,800,796
Operating Partnership [Member]
Balance and significant terms of the Exchangeable Notes outstanding
Principal amount	1,698,791,000	1,698,791,000
Operating Partnership [Member] | 3.25% Exchangeable Notes [Member]
Balance and significant terms of the Exchangeable Notes outstanding
Interest rate on exchangeable notes	3.25%	3.25%	3.25%
Capped call option positions
Referenced shares of common stock under capped call options	1,121,201	1,121,201	1,121,201
Exchange price including effect of capped calls	102.72	102.72	102.72
Operating Partnership [Member] | 4.25% Exchangeable Notes [Member]
Balance and significant terms of the Exchangeable Notes outstanding
Principal amount	$ 172,500,000	$ 172,500,000
Interest rate on exchangeable notes	4.25%	4.25%	4.25%
Capped call option positions
Referenced shares of common stock under capped call options	4,800,796	4,800,796	4,800,796
Exchange price including effect of capped calls	42.81	42.81	42.81

XML



Secured and Unsecured Debt of the Operating Partnership (Details 1) (USD $) In Thousands, unless otherwise specified			6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Operating Partnership [Member]	Dec. 31, 2010 Operating Partnership [Member]	Jun. 30, 2011 Exchangeable Notes [Member]	Jun. 30, 2010 Exchangeable Notes [Member]	Jun. 30, 2011 Exchangeable Notes [Member]	Jun. 30, 2010 Exchangeable Notes [Member]
Interest Expense for the Exchangeable Notes
Contractual interest payments					$ 3,035	$ 4,241	$ 6,070	$ 8,495
Amortization of discount					1,722	2,372	3,410	4,679
Interest expense attributable to the Exchangeable Notes					4,757	6,613	9,480	13,174
Terms of the Credit Facility
Outstanding borrowings	245,000	159,000	245,000	159,000
Remaining borrowing capacity			255,000	341,000
Total borrowing capacity			$ 500,000	$ 500,000
Interest rate			2.87%	2.99%
Facility Fee			0.35%	0.575%
Maturity date			August 2015	August 2013

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Secured and Unsecured Debt of the Operating Partnership (Details 2) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Capitalized interest and loan fees
Interest expense	$ 21,228	$ 13,088	$ 42,104	$ 25,044
Operating Partnership [Member]
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Remaining 2011	72,262		72,262
2012	305,303		305,303
2013	6,373		6,373
2014	262,443		262,443
2015	602,382		602,382
Thereafter	450,028		450,028
Total	1,698,791		1,698,791
Capitalized interest and loan fees
Gross interest expense	23,293	15,897	46,148	30,437
Capitalized interest	(2,065)	(2,809)	(4,044)	(5,393)
Interest expense	21,228	13,088	42,104	25,044
Operating Partnership [Member] | 4.25% Exchangeable Notes [Member]
Stated debt maturities and scheduled amortization payments, excluding debt discounts
Total	$ 172,500		$ 172,500

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Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
REVENUES:
Rental income	$ 83,452	$ 65,038	$ 163,742	$ 125,694
Tenant reimbursements	7,510	6,483	13,932	12,201
Other property income	1,102	895	2,515	1,340
Total revenues	92,064	72,416	180,189	139,235
EXPENSES:
Property expenses	17,583	14,543	35,272	26,563
Real estate taxes	8,413	6,482	16,582	12,518
Provision for bad debts	120	(12)	146	14
Ground leases (Note 11)	424	370	763	312
General and administrative expenses	7,440	6,728	14,000	13,823
Acquisition-related expenses	1,194	957	1,666	1,270
Depreciation and amortization	32,248	23,722	61,559	44,660
Total expenses	67,422	52,790	129,988	99,160
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (losses) (Note 12)	58	(18)	242	366
Interest expense (Note 5)	(21,228)	(13,088)	(42,104)	(25,044)
Loss on early extinguishment of debt		(4,564)		(4,564)
Total other (expenses) income	(21,170)	(17,670)	(41,862)	(29,242)
NET INCOME	3,472	1,956	8,339	10,833
Net loss (income) attributable to noncontrolling common units of the Operating Partnership	10	60	(24)	(132)
NET INCOME ATTRIBUTABLE TO KILROY REALTY CORPORATION	3,482	2,016	8,315	10,701
PREFERRED DISTRIBUTIONS AND DIVIDENDS:
Distributions to noncontrolling cumulative redeemable preferred units of the Operating Partnership	(1,397)	(1,397)	(2,794)	(2,794)
Preferred dividends	(2,402)	(2,402)	(4,804)	(4,804)
Total preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ (317)	$ (1,783)	$ 717	$ 3,103
Net (loss) income available to common stockholders per share-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Net (loss) income available to common stockholders per share-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Weighted average common shares outstanding - basic (Note 14)	57,685,710	50,296,643	55,008,765	46,674,494
Weighted average common shares outstanding - diluted (Note 14)	57,685,710	50,296,643	55,384,729	46,677,850
Dividends declared per common share	$ 0.35	$ 0.35	$ 0.70	$ 0.70

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Secured and Unsecured Debt of the Operating Partnership (Details 3) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Maturity Date			Nov. 15, 2014
Annual interest rate (mortgage loan)				3.25%
Number of Buildings	8	8
Exchange price per share average trading price	$ 35.93	$ 35.93		$ 35.93
Average Trading Price of the Company's Stock	$ 39.90	$ 38.94
Operating Partnership [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Principal amount	$ 1,698,791,000	$ 1,698,791,000
Additional line of credit under Credit Facility		200,000,000
Credit facility spread	1.75%	1.75%	2.675%
Operating Partnership [Member] | 3.25% Exchangeable Notes [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Annual interest rate (mortgage loan)	3.25%	3.25%	3.25%
Exchange price including effect of capped calls	102.72	102.72	102.72
Operating Partnership [Member] | 4.25% Exchangeable Notes [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Annual interest rate (mortgage loan)	4.25%	4.25%	4.25%
Principal amount	172,500,000	172,500,000
Exchange price including effect of capped calls	42.81	42.81	42.81
Fair value of the shares upon conversion if Exchangeable Notes were converted on specified date	191,400,000	191,400,000
Amount by which fair value of the shares upon conversion exceeds principal amount of the Exchangeable Notes on the specified date		18,900,000
Operating Partnership [Member] | 4.94%Mortgage Payable due April 15, 2015 [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Number of Buildings	4	4
New Amendment to Credit Facility [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Amount incurred in debt origination and legals costs		3,300,000
Prior Credit Facility [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Amount incurred in debt origination and legal costs		5,000,000
4.27% Mortgage Payable due Feb 1, 2018 [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Principal amount of unsecured senior notes	135,000,000	135,000,000
Maturity Date		Feb. 01, 2018
Annual interest rate (mortgage loan)	4.27%	4.27%
Debt Amortization Period in Number of Years		30
4.94% Mortgage Payable due April 15, 2015 [Member]
Secured and Unsecured Debt of the Operating Partnership (Textuals) (Abstract)
Principal amount of unsecured senior notes	30,000,000	30,000,000
Maturity Date		Apr. 15, 2015
Annual interest rate (mortgage loan)	4.94%	4.94%
Debt Amortization Period in Number of Years		30
Debt premium	$ 1,000,000	$ 1,000,000

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Noncontrolling Interests on the Company's Consolidated Financial Statements (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Noncontrolling Interest (Textuals) [Abstract]
Changes to noncontrolling interest	$ 0	$ 0	$ 0	$ 0
Percentage of general partnership interest owned by the company in the Operating Partnership	97.10%	96.70%	97.10%	96.70%	96.80%
Common limited partnership interest rate	2.90%	3.30%	2.90%	3.30%	3.20%
Common units outstanding	1,718,131	1,723,131	1,718,131	1,723,131	1,723,131
Conversion ratio of common units for common stock	1		1
Common stock, par value	$ 0.01		$ 0.01		$ 0.01
Number of trading days			10
Aggregate value upon redemption of outstanding noncontrolling common units	$ 66.6		$ 66.6		$ 61.4
Series A Preferred Units [Member]
Temporary Equity [Line Items]
7.45% Series A cumulative redeemable preferred units of the Operating Partnership issued	1,500,000		1,500,000		1,500,000
7.45% Series A cumulative redeemable preferred units of the Operating Partnership outstanding	1,500,000		1,500,000		1,500,000
Preferred units redemption value per unit	$ 50.00		$ 50.00		$ 50.00

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Stockholders' Equity of the Company (Details) (USD $) In Thousands, except Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Stockholders' Equity of the Company [Abstract]
Underwritten public offering of common stock, shares	6,037,500
Proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering expenses	$ 221,015	$ 299,847

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Partners' Capital of the Operating Partnership (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Partners' Capital of the Operating Partnership [Abstract]
Underwritten public offering of common stock, shares	6,037,500
Proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering expenses	$ 221,015	$ 299,847
Issuance of common units, units (Note 8)	6,037,500
Common units in Operating Partnership	58,464,412	52,296,219	52,349,670
Common general partnership interest in operating partnership	97.10%	96.70%	96.80%
Common limited partnership interest rate	2.90%	3.30%	3.20%
Limited partnership units outstanding	1,718,131	1,723,131	1,723,131

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Share Based Compensation (Details) (USD $) In Thousands, except Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Summary of Nonvested Shares
Outstanding at January 1, 2011 , Shares	50,032
Outstanding at January 1, 2011, Weighted Average Grant Date Fair Value	$ 58.40
Granted, Non-Vested Shares	68,727	3,239
Granted, Weighted Average Grant Date Fair Value	$ 37.83	$ 30.88
Vested, Shares	(9,474)	(16,358)
Vested, Weighted Average Grant Date Fair Value	$ 56.76
Outstanding as June 30, 2011, Shares	109,285
Outstanding as of June 30, 2011, Weighted Average Grant Date Fair Value	$ 45.61
Summary of Nonvested and Vested Shares
Granted, Non-Vested Shares	68,727	3,239
Granted, Weighted Average Grant Date Fair Value	$ 37.83	$ 30.88
Vested, Shares	(9,474)	(16,358)
Vested shares, total fair value	$ 370	$ 474

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Share Based Compensation (Details 1) (USD $) In Thousands, except Share data	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Summary of restricted stock units
Outstanding at January 1, 2011 , Shares	50,032
Outstanding at January 1, 2011, Weighted Average Grant Date Fair Value	$ 58.40
Granted, Non-Vested Shares	68,727	3,239
Granted, Weighted Average Grant Date Fair Value	$ 37.83	$ 30.88
Vested, Shares	(9,474)	(16,358)
Vested, Weighted Average Grant Date Fair Value	$ 56.76
Outstanding as June 30, 2011, Shares	109,285
Outstanding as of June 30, 2011, Weighted Average Grant Date Fair Value	$ 45.61
Summary of Nonvested and Vested Restricted Stock Units
Granted, Non-Vested Shares	68,727	3,239
Granted, Weighted Average Grant Date Fair Value	$ 37.83	$ 30.88
Vested, Shares	(9,474)	(16,358)
Vested shares, total fair value	$ 370	$ 474
Nonvested Restricted Stock Units RSU [Member]
Summary of restricted stock units
Outstanding at January 1, 2011 , Shares	125,754
Outstanding at January 1, 2011, Weighted Average Grant Date Fair Value	$ 29.88
Granted, Non-Vested Shares	107,673	159,606
Granted, Weighted Average Grant Date Fair Value	$ 37.94	$ 30.24
Vested, Shares	(23,035)
Vested, Weighted Average Grant Date Fair Value	$ 30.57
Issuance of dividend equivalents	0
Cancelled	0
Outstanding as June 30, 2011, Shares	210,392
Outstanding as of June 30, 2011, Weighted Average Grant Date Fair Value	$ 33.93
Summary of Nonvested and Vested Restricted Stock Units
Granted, Non-Vested Shares	107,673	159,606
Granted, Weighted Average Grant Date Fair Value	$ 37.94	$ 30.24
Vested, Shares	(23,035)
Vested Restricted Stock Units RSU [Member]
Summary of restricted stock units
Outstanding at January 1, 2011, Vested RSUs and Total RSUs	588,068
Granted, Non-Vested Shares	0
Vested, Shares	23,035	23,564
Issuance of dividend equivalents	13,494
Cancelled	(8,448)
Outstanding as of June 30, 2011,Vested RSUs and Total RSUs	616,149
Summary of Nonvested and Vested Restricted Stock Units
Granted, Non-Vested Shares	0
Vested, Shares	23,035	23,564
Vested shares, total fair value	$ 897	$ 740
Restricted Stock Units (RSUs) [Member]
Summary of restricted stock units
Outstanding at January 1, 2011, Vested RSUs and Total RSUs	713,822
Granted, Non-Vested Shares	107,673
Vested, Shares	0
Issuance of dividend equivalents	13,494
Cancelled	(8,448)
Outstanding as of June 30, 2011,Vested RSUs and Total RSUs	826,541
Summary of Nonvested and Vested Restricted Stock Units
Granted, Non-Vested Shares	107,673
Vested, Shares	0

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Share Based Compensation (Details Textuals) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Share-Based Compensation (Textuals) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	3,821,041		3,821,041
Share based compensation available for grant full value awards subject to full value awards	1,308,576		1,308,576
Share-based compensation programs, total compensation cost	$ 1.4	$ 2.2	$ 2.8	$ 4.3
Share-based compensation cost capitalized as part of real estate assets	0.3	0.3	0.6	0.7
Total unrecognized compensation cost related to nonvested incentive awards granted	$ 7.1		$ 7.1
Total unrecognized compensation cost weighted-average period			1.6
Number of shares that were tendered to satisfy minimum statutory tax withholding requirements			2,198

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Future Minimum Rent (Details) (USD $) In Thousands	Jun. 30, 2011
Future contractual minimum rent under operating lease
Remaining 2011	$ 153,705
2012	313,019
2013	293,621
2014	263,342
2015	210,150
Thereafter	658,754
Total	$ 1,892,591

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Commitments and Contingencies (Details) (USD $) In Thousands	Jun. 30, 2011
Summary of minimum commitment
Remaining 2011	$ 1,041
2012	1,926
2013	1,926
2014	1,870
2015	1,830
Thereafter	133,212
Total	$ 141,805

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Commitments and Contingencies (Details 1) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Commitments and Contingencies (Textuals) [Abstract]
Period after which Ground lease rentals are adjusted based on fair market value and the Consumer Price Index	5 years
Annual ground lease rental obligations	$ 1.0
Contractual obligations for ground lease including annual rental obligation	The minimum rent is subject to increases every five years based on 50% of the average annual percentage rent for the previous five years
Non-refundable escrow deposits related to potential future acquisitions	$ 16.0

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Consolidated Statements of Operations (KILROY REALTY, L.P.) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
REVENUES:
Rental income	$ 83,452	$ 65,038	$ 163,742	$ 125,694
Tenant reimbursements	7,510	6,483	13,932	12,201
Other property income	1,102	895	2,515	1,340
Total revenues	92,064	72,416	180,189	139,235
EXPENSES:
Property expenses	17,583	14,543	35,272	26,563
Real estate taxes	8,413	6,482	16,582	12,518
Provision for bad debts	120	(12)	146	14
Ground leases (Note 11)	424	370	763	312
General and administrative expenses	7,440	6,728	14,000	13,823
Acquisition-related expenses	1,194	957	1,666	1,270
Depreciation and amortization	32,248	23,722	61,559	44,660
Total expenses	67,422	52,790	129,988	99,160
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (losses) (Note 12)	58	(18)	242	366
Interest expense (Note 5)	(21,228)	(13,088)	(42,104)	(25,044)
Loss on early extinguishment of debt		(4,564)		(4,564)
Total other (expenses) income	(21,170)	(17,670)	(41,862)	(29,242)
NET INCOME	3,472	1,956	8,339	10,833
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	3,482	2,016	8,315	10,701
Preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	(317)	(1,783)	717	3,103
Net (loss) income available to common unitholders per unit-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Net (loss) income available to common unitholders per unit-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Weighted average common units outstanding - basic (Note 15)	57,685,710	50,296,643	55,008,765	46,674,494
Weighted average common units outstanding - diluted (Note 15)	57,685,710	50,296,643	55,384,729	46,677,850
Kilroy Realty, L.P. [Member]
REVENUES:
Rental income	83,452	65,038	163,742	125,694
Tenant reimbursements	7,510	6,483	13,932	12,201
Other property income	1,102	895	2,515	1,340
Total revenues	92,064	72,416	180,189	139,235
EXPENSES:
Property expenses	17,583	14,543	35,272	26,563
Real estate taxes	8,413	6,482	16,582	12,518
Provision for bad debts	120	(12)	146	14
Ground leases (Note 11)	424	370	763	312
General and administrative expenses	7,440	6,728	14,000	13,823
Acquisition-related expenses	1,194	957	1,666	1,270
Depreciation and amortization	32,248	23,722	61,559	44,660
Total expenses	67,422	52,790	129,988	99,160
OTHER (EXPENSES) INCOME:
Interest income and other net investment gains (losses) (Note 12)	58	(18)	242	366
Interest expense (Note 5)	(21,228)	(13,088)	(42,104)	(25,044)
Loss on early extinguishment of debt		(4,564)		(4,564)
Total other (expenses) income	(21,170)	(17,670)	(41,862)	(29,242)
NET INCOME	3,472	1,956	8,339	10,833
Net income attributable to noncontrolling interests in consolidated subsidiaries	(32)	(51)	(65)	(96)
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	3,440	1,905	8,274	10,737
Preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ (359)	$ (1,894)	$ 676	$ 3,139
Net (loss) income available to common unitholders per unit-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Net (loss) income available to common unitholders per unit-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Weighted average common units outstanding - basic (Note 15)	59,407,687	52,019,774	56,731,316	48,397,625
Weighted average common units outstanding - diluted (Note 15)	59,407,687	52,019,774	57,107,280	48,400,981
Distributions declared per common unit	$ 0.35	$ 0.35	$ 0.70	$ 0.70

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Fair Value Measurements and Disclosures (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Fair value of the Company's marketable securities
Marketable securities	$ 5,654		$ 5,654		$ 4,902
Fair value adjustment of marketable securities and deferred compensation plan liability
Other net investments gains	26	(322)	213	(121)
Compensation cost	(26)	359	(213)	158
Fair Value (Level 1) [Member]
Fair value of the Company's marketable securities
Marketable securities	5,654		5,654		4,902
Deferred compensation plan liability	$ 5,560		$ 5,560		$ 4,809

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Fair Value Measurements and Disclosures (Details 1) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Liabilities
Unamortized premium on Mortgage loan	$ 475,820	$ 313,009
Exchangeable notes	303,374	299,964
Unsecured senior notes	655,929	655,803
Outstanding borrowings	245,000	159,000
Carrying Value [Member]
Liabilities
Unamortized premium on Mortgage loan	475,820	313,009
Exchangeable notes	303,374	299,964
Unsecured senior notes	655,929	655,803
Outstanding borrowings	245,000	159,000
Fair Value [Member]
Liabilities
Unamortized premium on Mortgage loan	493,185	329,456
Exchangeable notes	324,322	312,598
Unsecured senior notes	705,220	661,644
Outstanding borrowings	$ 244,757	$ 159,659

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Segment Disclosure (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Consolidated net income
Operating revenues	$ 92,064	$ 72,416	$ 180,189	$ 139,235
Property and related expenses	26,540	21,383	52,763	39,407
Net Operating Income	65,524	51,033	127,426	99,828
Assets:
Land, buildings, and improvements, net	2,627,984		2,627,984		2,254,077
Undeveloped land and construction in progress	303,998		303,998		290,365
Total Assets	3,264,787		3,264,787		2,816,565
Reportable Segment-Office Properties [Member]
Consolidated net income
Operating revenues	84,560	64,718	165,379	124,321
Property and related expenses	24,729	19,503	47,639	35,757
Net Operating Income	59,831	45,215	117,740	88,564
Assets:
Land, buildings, and improvements, net	2,481,829		2,481,829		2,108,019
Undeveloped land and construction in progress	303,998		303,998		290,365
Total Assets	3,027,731		3,027,731		2,611,206
Non-Reportable Segment-Industrial Properties [Member]
Consolidated net income
Operating revenues	7,504	7,698	14,810	14,914
Property and related expenses	1,811	1,880	5,124	3,650
Net Operating Income	5,693	5,818	9,686	11,264
Assets:
Land, buildings, and improvements, net	146,155		146,155		146,058
Total Assets	160,172		160,172		159,612
Total Segments [Member]
Assets:
Total Assets	$ 3,187,903		$ 3,187,903		$ 2,770,818

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Segment Disclosure (Details 1) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Reconciliation to Consolidated Net Income:
Total Net Operating Income for segments	$ 65,524	$ 51,033	$ 127,426	$ 99,828
Unallocated (expenses) income:
General and administrative expenses	(7,440)	(6,728)	(14,000)	(13,823)
Acquisition-related expenses	(1,194)	(957)	(1,666)	(1,270)
Depreciation and amortization	(32,248)	(23,722)	(61,559)	(44,660)
Interest income and other net investment gains (losses)	58	(18)	242	366
Interest expense (Note 5)	(21,228)	(13,088)	(42,104)	(25,044)
Loss on early extinguishment of debt		(4,564)		(4,564)
NET INCOME	$ 3,472	$ 1,956	$ 8,339	$ 10,833

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Segment Disclosure (Details 2) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Reconciliation to Consolidated Assets:
Total assets for reportable segments	$ 3,264,787	$ 2,816,565
Other unallocated asset:
Cash and cash equivalents	25,412	14,840	29,428	9,883
Restricted cash	1,349	1,461
Marketable securities	5,654	4,902
Deferred financing costs, net	18,910	16,447
Prepaid expenses and other assets, net	25,559	8,097
Total Assets	3,264,787	2,816,565
Total Segments [Member]
Reconciliation to Consolidated Assets:
Total assets for reportable segments	3,187,903	2,770,818
Other unallocated asset:
Total Assets	$ 3,187,903	$ 2,770,818

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Net (Loss) Income Available to Common Stockholders Per Share of the Company (Details) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Numerator:
Net income attributable to Kilroy Realty Corporation	$ 3,482	$ 2,016	$ 8,315	$ 10,701
Preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	(317)	(1,783)	717	3,103
Allocation to participating securities (nonvested units and RSUs)	(327)	(305)	(649)	(604)
Numerator for basic and diluted net (loss) income available to common stockholders	$ (644)	$ (2,088)	$ 68	$ 2,499
Denominator:
Weighted average common shares outstanding - basic (Note 14)	57,685,710	50,296,643	55,008,765	46,674,494
Effect of dilutive securities - Exchangeable Notes and stock options			375,964	3,356
Diluted weighted average vested shares and common share equivalents outstanding	57,685,710	50,296,643	55,384,729	46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05

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Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership (Details) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Numerator:
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	$ 3,482	$ 2,016	$ 8,315	$ 10,701
Preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	(317)	(1,783)	717	3,103
Allocation to participating securities (nonvested units and RSUs)	(327)	(305)	(649)	(604)
Numerator for basic and diluted net (loss) available to common unitholders	(644)	(2,088)	68	2,499
Denominator:
Weighted average common units outstanding - basic (Note 15)	57,685,710	50,296,643	55,008,765	46,674,494
Effect of dilutive securities - Exchangeable Notes and stock options			375,964	3,356
Weighted average common units outstanding - diluted (Note 15)	57,685,710	50,296,643	55,384,729	46,677,850
Basic earnings per unit:
Net (loss) income available to common unitholders per unit-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Operating Partnership [Member]
Numerator:
NET INCOME ATTRIBUTABLE TO KILROY REALTY, L.P.	3,440	1,905	8,274	10,737
Preferred distributions and dividends	(3,799)	(3,799)	(7,598)	(7,598)
NET (LOSS) INCOME AVAILABLE TO COMMON STOCKHOLDERS	(359)	(1,894)	676	3,139
Allocation to participating securities (nonvested units and RSUs)	(327)	(305)	(649)	(604)
Numerator for basic and diluted net (loss) available to common unitholders	$ (686)	$ (2,199)	$ 27	$ 2,535
Denominator:
Weighted average common units outstanding - basic (Note 15)	59,407,687	52,019,774	56,731,316	48,397,625
Effect of dilutive securities - Exchangeable Notes and stock options			375,964	3,356
Weighted average common units outstanding - diluted (Note 15)	59,407,687	52,019,774	57,107,280	48,400,981
Basic earnings per unit:
Net (loss) income available to common unitholders per unit-basic	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit-diluted	$ (0.01)	$ (0.04)	$ 0.00	$ 0.05

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Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jul. 31, 2011	Jul. 15, 2011	Jun. 30, 2010
Subsequent Events (Textuals) [Abstract]
Annual interest rate (mortgage loan)			3.25%
Aggregate dividends, distributions, and dividend equivalents paid to common stockholders and common unitholders		$ 21.4
At Market Stock Offering Program Aggregate Value Of Common Stock	200
Operating Partnership [Member]
Subsequent Events (Textuals) [Abstract]
Principal amount of unsecured senior notes	$ 325.0
Annual interest rate (mortgage loan)	4.80%

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Pro Forma Results of the Company (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Pro Forma Results of the Company (Textuals) [Abstract]
Percentage of purhcase price for largest acquisition in whole purchase price	52.10%	52.10%		52.10%
Non-recurring acquisition-related expanses		$ 1,194	$ 957	$ 1,666	$ 1,270
Profroma Results of the Company [Member]
Pro forma consolidated results of operations of the company
Revenues		95,050	76,981	187,478	148,282
Net (loss) income available to common stockholders		(585)	(1,544)	(645)	3,876
Net (loss) income available to common stockholders per share - basic		$ (0.02)	$ (0.04)	$ (0.02)	$ 0.07
Net (loss) income available to common stockholders per share - diluted		$ (0.02)	$ (0.04)	$ (0.02)	$ 0.07
Actual results for certain operating data for the property
Revenues	1,425
Net Income	7
Pro Forma Results of the Company (Textuals) [Abstract]
Percentage of purhcase price for largest acquisition in whole purchase price	52.10%	52.10%		52.10%
Non-recurring acquisition-related expanses		$ 300		$ 300

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Pro Forma Results of the Operating Partnership (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Pro Forma Results of the Operating Partnership (Textuals) [Abstract]
Percentage of purhcase price for largest acquisition in whole purchase price	52.10%	52.10%		52.10%
Kilroy Realty, L.P. [Member]
Pro Forma Results of the Operating Partnership
Revenues		$ 95,050,000	$ 76,981,000	$ 187,478,000	$ 148,282,000
Net (loss) income available to common unitholders		(632,000)	(1,650,000)	(713,000)	3,932,000
Net (loss) income available to common unitholders per unit - basic		$ (0.02)	$ (0.04)	$ (0.02)	$ 0.07
Net (loss) income available to common unitholders per unit - diluted		$ (0.02)	$ (0.04)	$ (0.02)	$ 0.07
Actual results for certain operating data for the property
Revenues	1,425,000
Net Income	7,000
Pro Forma Results of the Operating Partnership (Textuals) [Abstract]
Percentage of purhcase price for largest acquisition in whole purchase price	52.10%	52.10%		52.10%
Acquisiton Related Expenses Excluded		$ 300,000		$ 300,000

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Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Preferred Stock	Common stock	Common Stock Additional Paid-in Capital	Common Stock Distributions in Excess of Earnings	Total Stockholders' Equity	Noncontrolling Interests - Common Units of the Operating Partnership
Beginning Balance at Dec. 31, 2009	$ 883,838	$ 121,582	$ 431	$ 913,657	$ (180,722)	$ 854,948	$ 28,890
Beginning Balance, shares at Dec. 31, 2009			43,148,762
Net income	10,833				10,701	10,701	132
Issuance of common stock (Note 7)	299,847		92	299,755		299,847
Issuance of common stock, shares (Note 7)			9,200,000
Issuance of share-based compensation awards, shares (Note 9)			3,239
Issuance of share-based compensation awards (Note 9)	1,660			1,660		1,660
Noncash amortization of share-based compensation	3,361			3,361		3,361
Exercise of stock options	83			83		83
Exercise of stock options, shares			4,000
Repurchase of common stock and restricted stock units (Note9)	(2,121)			(2,121)		(2,121)
Repurchase of common stock and restricted stock units,share (Note9)			(59,782)
Allocation to the equity component of cash paid upon repurchase of 3.25% Exchangeable Notes	(2,694)			(2,694)		(2,694)
Adjustment for noncontrolling interest				(4,985)		(4,985)	4,985
Preferred distributions and dividends	(7,598)				(7,598)	(7,598)
Dividends declared per common share and common unit ($0.70 per share/ unit)	(35,143)				(33,936)	(33,936)	(1,207)
Ending Balance at Jun. 30, 2010	1,152,066	121,582	523	1,208,716	(211,555)	1,119,266	32,800
Ending Balance, shares at Jun. 30, 2010			52,296,219
Beginning Balance at Dec. 31, 2010	1,117,730	121,582	523	1,211,498	(247,252)	1,086,351	31,379
Beginning Balance, shares at Dec. 31, 2010	52,349,670		52,349,670
Net income	8,339				8,315	8,315	24
Issuance of common stock (Note 7)	221,015		61	220,954		221,015
Issuance of common stock, shares (Note 7)	6,037,500		6,037,500
Issuance of share-based compensation awards, shares (Note 9)			68,727
Issuance of share-based compensation awards (Note 9)	2,156		1	2,155		2,156
Noncash amortization of share-based compensation	2,813			2,813		2,813
Exercise of stock options	395			395		395
Exercise of stock options, shares			15,000
Repurchase of common stock and restricted stock units (Note9)	(732)			(732)		(732)
Repurchase of common stock and restricted stock units,share (Note9)			(11,485)
Exchange of common units of the Operating Partnership				91		91	(91)
Exchange of common units of the Operating Partnership, shares			5,000
Adjustment for noncontrolling interest				(3,223)		(3,223)	3,223
Preferred distributions and dividends	(7,598)				(7,598)	(7,598)
Dividends declared per common share and common unit ($0.70 per share/ unit)	(40,585)				(39,381)	(39,381)	(1,204)
Ending Balance at Jun. 30, 2011	$ 1,303,533	$ 121,582	$ 585	$ 1,433,951	$ (285,916)	$ 1,270,202	$ 33,331
Ending Balance, shares at Jun. 30, 2011	58,464,412		58,464,412

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Consolidated Statements of Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Interest rate on exchangeable notes	3.25%		3.25%
Dividends declared, per common share and common unit	$ 0.35	$ 0.70	$ 0.70
Common Stock Additional Paid-in Capital
Interest rate on exchangeable notes	3.25%		3.25%
Common Stock Distributions in Excess of Earnings
Dividends declared, per common share and common unit		$ 0.70	$ 0.70
Total Stockholders' Equity
Interest rate on exchangeable notes	3.25%		3.25%
Dividends declared, per common share and common unit		$ 0.70	$ 0.70
Noncontrolling Interests - Common Units of the Operating Partnership
Dividends declared, per common share and common unit		$ 0.70	$ 0.70