| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Giem Judi | Chief Human Resources Officer | C/O COLUMBIA BANKING SYSTEM, INC., PO BOX 2156, MS 3100, TACOMA | /s/ Lisa M. White, Attorney-in-fact | 09 Jun 2025 | 0001813483 |
No securities are beneficially owned.
Exhibit 24 - Power of Attorney