SEC Form 4 · accession 0000887343-26-000178
COLUMBIA BANKING SYSTEM, INC. · COLB
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Luis Machuca
Director
Period of report
Sep 14, 2026
Accepted (ET)
Sep 15, 2026 · 4:55 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000887343
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Deferred Compensation Phantom StockF1 | — | Sep 14, 2026 | A | 594 | A | — | — | Common | 594 | 49,560 | I |
Explanation of responses
- F1The deferred compensation plan phantom stock was accrued under the Registrant's deferred compensation plan and will be settled in accordance with the terms of the deferred compensation plan following the reporting person's cessation of service as a director of the Registrant.