SEC Form 4 · accession 0001084960-26-000007
COLUMBIA BANKING SYSTEM, INC. · COLB
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Simone Lagomarsino
Director
Period of report
Sep 2, 2026
Accepted (ET)
Sep 4, 2026 · 4:41 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000887343
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Sep 2, 2026 | A | 2,670 | $0.00 | A | 2,670 | D | |
| Common Stock | holding | — | — | — | 32,931 | I | by family trust | |
| Common Stock | holding | — | — | — | 7 | I | by IRA |
Table II — derivative securities
No Table II lines on this filing.