InsiderTrades

Form 4 for COLB COLUMBIA BANKING SYSTEM, INC.

Accepted 2026-05-18 17:17:04 ET · period of report 2026-05-14 · accession 0001481735-26-000003 · 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
2026-05-18 17:17 2026-05-14 COLB Terry Hilliard C. III Dir A - Grant $0.00 +3,949 55.5K +8% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-05-14 A A 3,949 $0.00 55,514 D — —