X0508 4 2026-03-04 0000946673 BANNER CORP BANR 0001568808 Reed James T Jr 10 SOUTH 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 1566 60.87 A 32154 D Common Stock, $0.01 par value per share 2026-03-04 4 F 0 478 60.87 D 31676 D This award for 2,176 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. Includes direct ownership of 825 shares through IRA. Shares relinquished to cover tax obligations on vesting of 1,566 performance shares pursuant to 2018 Omnibus Incentive Plan. /s/ Richard C. Arnold, attorney-in-fact for Mr. Reed 2026-03-05