X0508 4 2025-11-16 0001130144 SIERRA BANCORP BSRR 0001349140 McPhaill Kevin J 86 N. MAIN STREET PORTERVILLE CA 93257 1 President/CEO 0 Common Stock 2025-11-16 4 F 0 1122 29.38 D 62172 D Common Stock 2025-11-18 4 F 0 993 28.59 D 61179 D Common Stock 2025-11-18 4 F 0 3693 28.59 D 57486 D Common Stock 20699 D Withholding of shares of common stock to satisfy tax withholding obligations in connection with the vesting of previously awarded shares of restricted stock. Withholding of shares of common stock to satisfy tax withholding obligations in connection with the vesting of previously awarded shares of restricted stock. The performance awards issued on November 18, 2022, included 5,864 target shares and 2,931 excess shares for exceeding performance targets. The performance awards vesting on November 18, 2025, included 1,406 shares of the 2,931 total excess performance shares granted. The remaining 1,525 shares of excess performance awards granted were not earned and did not vest because the remaining performance criteria were not achieved and thus, those 1,525 shares were forfeited on November 18, 2025 /s/ Kevin J. McPhaill 2025-11-19