UNITED STATES SECURITIES AND EXCHANGE COMMISSION For the quarterly period ended June 30, 2019 Washington, D.C. 20549 OR FORM 10-Q ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Mark One) For the transition period from to Commission File Number: 1-12675 (Kilroy Realty Corporation) Commission File Number: 000-54005 (Kilroy Realty, L.P.) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Exact name of registrant as specified i ...

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 March 31, 2019 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 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ¨ 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. ...