X0508 4 2026-02-05 0 0001025996 KILROY REALTY CORP NYSE: KRC 0001565262 Smart Justin William C/O KILROY REALTY CORPORATION 12200 W. OLYMPIC BLVD., SUITE 200 LOS ANGELES CA 90064 0 1 0 0 President 0 Common stock, par value $0.01 per share 2026-02-05 4 A 0 20482 0 A 396638.22 D Common stock, par value $0.01 per share 2026-02-05 4 M 0 134097 0 A 530735.22 D Common stock, par value $0.01 per share 2026-02-05 4 F 0 7223 34.31 D 523512.22 D Restricted Stock Units 2026-02-05 4 A 0 87163.5131 0 A Common Stock 87163.5131 183673.9429 D Restricted Stock Units 2026-02-05 4 A 0 47008.9501 0 A Common Stock 47008.9501 230682.893 D Restricted Stock Units 2026-02-05 4 M 0 134097 0 D Common Stock 134097 96585.893 D Award of restricted stock units granted pursuant to the Kilroy Realty 2006 Incentive Award Plan. Each restricted stock unit carries with it a right to receive dividend equivalents in respect of the share of stock underlying such restricted stock unit. Restricted stock units tendered to pay tax withholding. Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. The reporting person was awarded performance units in 2023 covering a three-year performance period ending December 31, 2025. The reporting person previously reported the minimum number of units subject to the award eligible to vest based on 2023 performance. The number of units reported reflects the additional number of units that vested based on 2024 and 2025 performance. The reporting person was awarded performance units in 2025 covering a three-year performance period ending December 31, 2027. The number of units reported reflects the minimum number of units eligible to vest based on 2025 performance. The units remain subject to additional time-based vesting requirements. Up to an additional 94,017.90 units may vest for the three-year performance period based on the Issuer's performance for that three-year period. The performance units were awarded in 2023 and the final number of units subject to the award (as adjusted for dividend equivalents through January 31, 2026) was determined based on a three-year performance period ending December 31, 2025. The units are payable in shares of the Issuer's common stock. /s/ Heidi R. Roth, as attorney-in-fact for Justin William Smart 2026-02-09