X0306 4 2021-02-26 0000946673 BANNER CORP BANR 0001568830 Quillin M Kirk 10 SOUTH FIRST AVENUE WALLA WALLA WA 99362 1 Executive VP, Banner Bank Common Stock, $0.01 par value per share 2021-02-26 4 A 0 1176 52.22 A 21679 D Common Stock, $0.01 par value per share 2021-02-26 4 F 0 353 52.22 D 21326 D This award for 1,800 performance shares was originally reported on April 2, 2018 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 February 26, 2021 used for administrative purposes. Includes direct ownership of 2,000 shares through a 401(k) rollover account and 444 shares through 401(k) Plan. Shares relinquished to cover tax obligation on vesting of 1,176 shares of restricted stock pursuant to 2014 Omnibus Incentive Plan. /s/ M. Kirk Quillin 2021-03-02