Updated Jul 16, 2026 · Last SEC filing 2026-07-02
COLUMBIA BANKING SYSTEM, INC. (COLB) has filed 13 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-02. 4 Form 8-K material event filings were reported by COLB in the last 90 days. 1 Form 144 notices of proposed sale were filed for COLB stock. InsiderAlpha tracks every COLB SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0000887343 |
|---|
| Form 4 filings (90d) | 13 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Deer Aaron James | EVP Chief Strategy/Innov Offcr | P — Open-market purchase | 886 | $25.37 | $22K | SEC | |
| Moore Devine David | EVP Chief Marketing Officer | S — Open-market sale | 3.8K | $29.77 | $114K | SEC | |
| Moore Devine David | EVP Chief Marketing Officer | S — Open-market sale | 60 | $29.77 | $2K | SEC | |
| MACHUCA LUIS | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| SCHULTZ JOHN F | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Lund Randal Lee | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| STUDENMUND JAYNIE M | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Forrest Eric | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Varnado Anddria | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Terry Hilliard C. III | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Finkelstein Mark A | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| MITCHELL M CHRISTIAN | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| SEATON ELIZABETH WHITEHEAD | Director | A — Grant or award | 3.9K | $0.00 | — | SEC | |
| Lakely Brock | EVP, Chief Accounting Officer | F — Tax withholding / forfeiture | 396 | $29.10 | $12K | SEC | |
| Namdar Frank | EVP Chief Credit Officer | M — Option exercise | 2.8K | $26.23 | $74K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for COLUMBIA BANKING SYSTEM, INC. (COLB). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Moore Devine David | 2 | $115K |
| MACHUCA LUIS | 2 | $18K |
| Varnado Anddria | 1 | — |
| SCHULTZ JOHN F | 1 | — |
| STUDENMUND JAYNIE M | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in COLB insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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