X0508 4 2026-03-04 0000946673 BANNER CORP BANR 0001838575 Brown Janet M 10 S. FIRST AVENUE WALLA WALLA WA 99362 1 Executive VP, Banner Bank 0 Common Stock, $0.01 par value per share 2026-03-04 4 A 0 1969 60.87 A 18414 D Common Stock, $0.01 par value per share 2026-03-04 4 F 0 587 60.87 D 17827 D This award for 2,737 performance shares was originally reported on April 3, 2023 at the maximum performance criteria. This supplements that filing to note the actual number of shares that vested based on the performance results as determined by Banner Corporation's Compensation Committee. Market price on March 4, 2026. Shares relinquished to cover tax obligations on vesting of 1,969 shares of restricted stock pursuant to the 2018 Omnibus Incentive Plan. /s/ Richard C. Arnold, attorney-in-fact for Ms. Brown 2026-03-05