X0508 4 2025-08-01 0000946673 BANNER CORP BANR 0001583207 Costa James M 10 SOUTH FIRST AVENUE WALLA WALLA 99362 1 Executive VP, Banner Bank 0 Common Stock, $0.01 par value per share 2025-08-01 4 A 0 4646 61.08 A 35912 D Represents award pursuant to 2023 Omnibus Incentive Plan; shares vest ratably over a three-year period beginning on August 1, 2025 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 August 1, 2025. /s/ James M. Costa 2025-08-05