X0306 4 2023-03-07 0000946673 BANNER CORP BANR 0001655207 Larsen Kenneth A 10 SOUTH FIRST AVENUE WALLA WALLA WA 99362 1 Executive VP, Banner Bank Common Stock, $0.01 par value per share 2023-03-07 4 A 0 1773 62.01 A 17623 D Common Stock, $0.01 par value per share 2023-03-07 4 F 0 479 62.01 D 17144 D This award for 2,110 performance shares was originally reported on March 27, 2020 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 7, 2023. Includes direct ownership of 2,709 shares through Deferred Compensation Plan and 225 shares through an IRA. Shares relinquished to cover tax obligations on vesting of 1,773 performance shares pursuant to 2018 Omnibus Incentive Plan. /s/ Kenneth A. Larsen 2023-03-09