$COLB (COLUMBIA BANKING SYSTEM) — 8-K: Columbia Banking System Co-President Torran Nixon to transition to senior advisor by July 1, 2027

Nixon will step down as Bank Co-President and Senior Executive Vice President of the Company as of July 1, 2027, or another mutually agreed date, then serve as a senior advisor through December 31, 2027. During his remaining time as Bank Co-President, he remains eligible for a 2027 equity grant with a target grant date fair value no less than his 2026 grant. As an advisor, he keeps health and welfare benefits, continues vesting in outstanding equity awards, and receives salary at his annual rate as of the Transition Date. He is eligible for a prorated 2027 annual incentive payout based on actual performance through the Transition Date.

Nixon will step down as Bank Co-President and Senior Executive Vice President of the Company as of July 1, 2027, or another mutually agreed date, then serve as a senior advisor through December 31, 20