InsiderTrades

Form 4 for COLB COLUMBIA BANKING SYSTEM, INC.

Accepted 2026-02-04 00:00:00 ET · period of report 2026-02-02 · accession 0000887343-26-000028 · 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
2026-02-04 2026-02-02 COLB BARUFFI KUMI YAMAMOTO EVP GC, Corp Sec F - Tax $29.69 -2,110 55.1K -4% -$62.6K
2026-02-04 2026-02-02 COLB BARUFFI KUMI YAMAMOTO EVP GC, Corp Sec A - Grant $29.69 +5,093 57.2K +10% +$151.2K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-02-02 F D 2,110 $29.69 55,106 D — — (F2) Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the shares granted pursuant to the terms of the performance restricted stock units vesting.
2 Common Common Stock 2026-02-02 A A 5,093 $29.69 57,216 D — — (F1) Shares granted pursuant to the terms of the performance restricted stock units granted on February 21, 2023, which vested on February 2, 2026 based on to the issuer's relative return on tangible common equity for fiscal years 2023-2025 compared to a Compensation Committee approved group of peers.