InsiderTrades

Form 4 for COLB COLUMBIA BANKING SYSTEM, INC.

Accepted 2026-07-02 17:17:10 ET · period of report 2026-06-30 · accession 0000887343-26-000161 · 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
2026-07-02 17:17 2026-06-30 COLB Deer Aaron James EVP Chief Strategy, Innov Offcr P - Purchase $25.37 +886 42.8K +2% +$22.5K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-06-30 P A 886 $25.37 42,761 D — — (F1) ESPP Purchase