X0306 4 2021-02-26 0000946673 BANNER CORP BANR 0001414635 Rust Steven W 10 SOUTH 1ST AVENUE WALLA WALLA WA 99362 1 Executive VP, Banner Bank Common Stock, $0.01 par value per share 2021-02-26 4 A 0 1190 52.22 A 14222 D Common Stock, $0.01 par value per share 2021-02-26 4 F 0 436 52.22 D 13786 D This award for 1,824 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 423 shares through Deferred Compensation Plan. Shares relinquished to cover tax obligation on vesting of 1,190 shares of restricted stock pursuant to 2014 Omnibus Incentive Plan. /s/ Steven W. Rust 2021-03-02