Moore Devine David plan to sell securities of COLUMBIA BANKING SYSTEM, INC. under Form 144

Moore Devine David filed Form 144 to notify SEC of plan to sell 3872 units of COLUMBIA BANKING SYSTEM, INC. securities around 2026-06-08, with aggregate market value of $115,288.50. The total outstanding units is 289490366.0. The amount planned to be sold represents 0.00% of total outstanding units;