InsiderTrades

Form 4 for COLB COLUMBIA BANKING SYSTEM, INC.

Accepted 2026-02-18 00:00:00 ET · period of report 2026-02-15 · accession 0000887343-26-000057 · 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
2026-02-18 2026-02-15 COLB Namdar Frank EVP Chief Credit Off F - Tax $31.49 -1,169 32.3K -3% -$36.8K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-02-15 F D 1,169 $31.49 32,278 D — —