InsiderTrades

Form 4 for COLB COLUMBIA BANKING SYSTEM, INC.

Accepted 2026-01-22 00:00:00 ET · period of report 2026-01-20 · accession 0000887343-26-000014 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
2026-01-22 2026-01-20 COLB Merrywell Christopher Senior Executive VP F - Tax $28.35 -3,496 38.3K -8% -$99.1K
2026-01-22 2026-01-20 COLB Merrywell Christopher Senior Executive VP D - Sale to Iss $0.00 -1,560 41.8K -4% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-01-20 F D 3,496 $28.35 38,336 D — — (F2) Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the vesting of previously issued restricted stock units.
2 Common Common Stock 2026-01-20 D D 1,560 $0.00 41,832 D — — (F1) Shares forfeited pursuant to the terms of the performance restricted stock units granted on February 21, 2023 and reported on the reporting person's Form 4 filed on February 21, 2023 (in accordance with Rule 16b-3(e)) due to the issuer's total shareholder return performance target not being met at target.