| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| SCHULTZ JOHN F | Director | C/O COLUMBIA BANKING SYSTEM, INC., PO BOX 2156, MS 3100, TACOMA | /s/ Lisa M. White, Attorney-in-fact | 16 May 2025 | 0001548933 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | COLB | Common Stock | Award | $0 | +3.38K | +7.34% | $0.00 | 49.4K | 15 May 2025 | Direct |