X0609 4 2026-04-01 0000946673 BANNER CORP BANR 0001187861 PURCELL CYNTHIA D false 10 SOUTH FIRST AVENUE WALLA WALLA WA 99362 1 Executive VP, Banner Bank 0 Common Stock, $0.01 par value per share 2026-04-01 4 A 0 3138 61.40 A 48147 D Common Stock, $0.01 par value per share 2026-04-01 4 A 0 4707 61.40 A 52854 D Common Stock, $0.01 par value per share 2026-04-01 4 F 0 502 61.34 D 52352 D Common Stock, $0.01 par value per share 2026-04-01 4 F 0 370 61.34 D 51982 D Represents award pursuant to 2023 Omnibus Incentive Plan; shares vest ratably over a three-year period beginning on April 1, 2026 and ending on the third anniversary thereof. Each restricted stock unit represents the right to receive one share of the Issuer's Common Stock upon vesting. These restricted stock units are subject to forfeiture and to limits on transferability until they vest. Closing price on April 1, 2026. Includes direct ownership of 4 shares through Deferred Compensation Plan, and 1,099 shares through 401(k) Plan. Represents award pursuant to 2023 Omnibus Incentive Plan and is subject to the achievement of specified corporate and individual performance goals over a period that began on January 1, 2026 and ends on December 31, 2028. The extent to which the award vests, if at all, depends on the extent to which the performance goals are satisfied. Each restricted stock unit represents the right to receive one share of the Issuer's Common Stock upon vesting. These restricted stock units are subject to forfeiture and to limits on transferability until they vest. Shares relinquished to cover tax obligation on vesting of 1,274 shares of restricted stock pursuant to 2018 Omnibus Incentive Plan. Market price on April 1, 2026. Shares relinquished to cover tax obligations on vesting of 939 performance shares pursuant to 2018 Omnibus Incentive Plan. /s/ Richard C. Arnold, attorney-in-fact for Ms. Purcell 2026-04-02