X0508 4 2025-11-16 0001130144 SIERRA BANCORP BSRR 0001630922 Olague Michael 86 N MAIN STREET PORTERVILLE CA 93257 1 EVP/Chief Banking Officer 0 Common Stock 2025-11-16 4 F 0 673 29.38 D 24241 D Common Stock 2025-11-18 4 F 0 596 28.59 D 23645 D Common Stock 2025-11-18 4 F 0 2216 28.59 D 21429 D Common Stock 8809 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 3,517 target shares and 1,759 excess shares for exceeding performance targets. The performance awards vesting on November 18, 2025, included 844 shares of the 1,759 total excess performance shares granted. The remaining 915 shares of excess performance awards granted were not earned and did not vest because the remaining performance criteria were not achieved and thus, those 915 shares were forfeited on November 18, 2025. /s/ Michael Olague 2025-11-19