Kilroy Realty, L.P.

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 95-4598246 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) Kilroy Realty, L.P. Delaware 95-4612685 (State or other jurisdiction of incorporation or organization) (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 is a shell company (as defined in Rule 12b-2 of the Exchange Act). Kilroy Realty Corporation Yes ☐ No ☑ Kilroy Realty, L.P. Yes ☐ No ☑ As of October 20, 2026, 116,308,988 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 September 30, 2026 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," "we," "our,"and"us" 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 Company is a real estate investment trust, or REIT, and the general partner of the Operating Partnership. As of September 30, 2026, the Company owned an approximate 99.0% common general partnership interest in the Operating Partnership and the remaining approximate 1.0% common limited partnership interest was owned by non-affiliated investors. 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. 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 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 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 generally contributes to the Operating Partnership in exchange for units of partnership interest, the Operating Partnership generates the capital required by the Company's business through the Operating Partnership's operations, the incurrence of indebtedness, or the issuance of units of partnership interest. The presentation of noncontrolling interests, 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 differences between stockholders' equity, partners' capital, and noncontrolling interests result from the differences in the equity issued by the Company and the Operating Partnership. 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: • Better reflects how management and the analyst community view the business as a single operating unit; • Enhances 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; • Creates efficiencies for the Company and the Operating Partnership and results in savings in time, effort, and expense; and • Creates efficiencies for investors by reducing duplicative disclosure and providing a single document for their review.

KILROY REALTY CORPORATION AND KILROY REALTY, L.P. QUARTERLY REPORT FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2026 TABLE OF CONTENTS

Page PART I - FINANCIAL INFORMATION Item 1. FINANCIAL STATEMENTS (UNAUDITED) OF KILROY REALTY CORPORATION 1 Consolidated Balance Sheets as of September 30, 2026 and December 31, 2025 1 Consolidated Statements of Operations for the Three and Nine Months ended Se ptember 30, 2026 and 2025 2 Consolidated Statements of Equity for the Three and Nine Months ended September 30, 2026 and 2025 3 Consolidated Statements of Cash Flows for the Nine Months ended September 30, 2026 and 2025 5 Item 1. FINANCIAL STATEMENTS (UNAUDITED) OF KILROY REALTY, L.P. 6 Consolidated Balance Sheets as of S e ptember 30, 2026 and December 31, 2025 6 Consolidated Statements of Operations for the Three and Nine Months ended September 30, 2026 and 2025 7 Consolidated Statements of Capital for the Three and Nine Months ended September 30, 2026 and 2025 8 Consolidated Statements of Cash Flows for the Nine Months ended September 30, 2026 and 2025 10 Notes to Unaudited Consolidated Financial Statements 11 Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 24 Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK 51 Item 4. CONTROLS AND PROCEDURES (KILROY REALTY CORPORATION AND KILROY REALTY, L.P.) 51 PART II - OTHER INFORMATION Item 1. LEGAL PROCEEDINGS 52 Item 1A. RISK FACTORS 52 Item 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS 52 Item 3. DEFAULTS UPON SENIOR SECURITIES 52 Item 4. MINE SAFETY DISCLOSURES 52 Item 5. OTHER INFORMATION 52 Item 6. EXHIBITS 53