SEC Form 4 · accession 0000887343-26-000161
COLUMBIA BANKING SYSTEM, INC. · COLB
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Aaron James Deer
Officer — EVP Chief Strategy/Innov Offcr
Period of report
Jun 30, 2026
Accepted (ET)
Jul 2, 2026 · 5:17 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 StockF1 | Jun 30, 2026 | P | 886 | $25.37 | A | 42,761 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1ESPP Purchase