28 insiders reported 138 Form 4 transactions for COLUMBIA BANKING SYSTEM, INC. (COLB) over the past 18 months (most recent 2026-08-18). Recent activity: Giem Judi (EVP CHRO) Buy 2,393 shares, Giem Judi (EVP CHRO) Sell 643 shares, Deer Aaron James (EVP Chief Strategy/Innov Offcr) Buy 886 shares, Moore Devine David (EVP Chief Marketing Officer) Sell 3,812 shares, Moore Devine David (EVP Chief Marketing Officer) Sell 60 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-18 | Giem Judi | EVP CHRO | Buy | 2,393 | $78,227 |
| 2026-08-18 | Giem Judi | EVP CHRO | Sell | 643 | $21,020 |
| 2026-07-02 | Deer Aaron James | EVP Chief Strategy/Innov Offcr | Buy | 886 | $22,478 |
| 2026-06-10 | Moore Devine David | EVP Chief Marketing Officer | Sell | 3,812 | $113,502 |
| 2026-06-10 | Moore Devine David | EVP Chief Marketing Officer | Sell | 60 | $1,786 |
| 2026-05-18 | MACHUCA LUIS | Director | Buy | 3,949 | $0 |
| 2026-05-18 | STUDENMUND JAYNIE M | Director | Buy | 3,949 | $0 |
| 2026-05-18 | MITCHELL M CHRISTIAN | Director | Buy | 3,949 | $0 |
| 2026-05-18 | Terry Hilliard C. III | Director | Buy | 3,949 | $0 |
| 2026-05-18 | Finkelstein Mark A | Director | Buy | 3,949 | $0 |
| 2026-05-18 | SCHULTZ JOHN F | Director | Buy | 3,949 | $0 |
| 2026-05-18 | SEATON ELIZABETH WHITEHEAD | Director | Buy | 3,949 | $0 |
| 2026-05-18 | Lund Randal Lee | Director | Buy | 3,949 | $0 |
| 2026-05-18 | Varnado Anddria | Director | Buy | 3,949 | $0 |
| 2026-05-18 | Forrest Eric | Director | Buy | 3,949 | $0 |
| 2026-04-16 | Lakely Brock | EVP, Chief Accounting Officer | Sell | 396 | $11,524 |
| 2026-03-20 | BARUFFI KUMI YAMAMOTO | EVP General Counsel, Corp Sec | Sell | 937 | $24,578 |
| 2026-03-20 | Lakely Brock | EVP, Chief Accounting Officer | Sell | 211 | $5,535 |
| 2026-03-17 | OGNALL ANDREW H | EVP Chief Risk Officer | Buy | 2,381 | $62,454 |
| 2026-03-17 | Moore Devine David | EVP Chief Marketing Officer | Buy | 940 | $24,656 |
| 2026-03-17 | Moore Devine David | EVP Chief Marketing Officer | Sell | 376 | $9,862 |
| 2026-03-17 | Namdar Frank | EVP Chief Credit Officer | Buy | 2,820 | $73,969 |
| 2026-03-17 | Namdar Frank | EVP Chief Credit Officer | Sell | 1,367 | $35,856 |
| 2026-03-17 | Lakely Brock | EVP, Chief Accounting Officer | Buy | 846 | $22,191 |
| 2026-03-17 | Lakely Brock | EVP, Chief Accounting Officer | Sell | 211 | $5,535 |
Source: SEC Form 4 filings · as of 2026-08-18