Columbia Banking System, Inc (COLB) insider trading
Every open-market stock purchase and sale by Columbia Banking System, Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Insiders sold $677K over the last 12 months (5 sales). No open-market buys.
- Last insider buy: Elizabeth Whitehead Seaton (Director), $49.6K, 2 years ago.
Last 12 months: insiders bought $0 (0 buys) and sold $677K (5 sales). Last close $29.95 on Sep 17, 2026.
Recent COLB insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Sep 14, 2026 | Luis Machuca (Director) | Bought (not open market) | $18.1K |
| Sep 4, 2026 | Steven R Gardner (Director) | Bought (not open market) | — |
| Sep 2, 2026 | Simone Lagomarsino (Director) | Bought (not open market) | — |
| Aug 14, 2026 | Judi Giem (VP) | Sold (not open market) | $21K |
| Aug 14, 2026 | Judi Giem (VP) | Bought (not open market) | — |
| Jun 15, 2026 | Luis Machuca (Director) | Bought (not open market) | $17.9K |
| Jun 8, 2026 | Devine David Moore (C-suite exec) | Sold | $114K |
| Jun 8, 2026 | Devine David Moore (C-suite exec) | Sold | $1.8K |
| May 14, 2026 | Eric Forrest (Director) | Bought (not open market) | — |
| May 14, 2026 | Anddria Varnado (Director) | Bought (not open market) | — |
| May 14, 2026 | Mark A Finkelstein (Director) | Bought (not open market) | — |
| May 14, 2026 | Luis Machuca (Director) | Bought (not open market) | — |
| May 14, 2026 | Elizabeth Whitehead Seaton (Director) | Bought (not open market) | — |
| May 14, 2026 | M Christian Mitchell (Director) | Bought (not open market) | — |
| May 14, 2026 | Jaynie M Studenmund (Director) | Bought (not open market) | — |
| May 14, 2026 | Hilliard C. Terry III (Director) | Bought (not open market) | — |
| May 14, 2026 | John F Schultz (Director) | Bought (not open market) | — |
| May 14, 2026 | Randal Lee Lund (Director) | Bought (not open market) | — |
| Apr 15, 2026 | Brock Lakely (C-suite exec) | Sold (not open market) | $11.5K |
| Mar 16, 2026 | Luis Machuca (Director) | Bought (not open market) | $17.7K |
| Mar 13, 2026 | Clint Stein (CEO) | Sold (not open market) | $188K |
| Mar 13, 2026 | Torran B Nixon (VP) | Sold (not open market) | $52.5K |
| Mar 13, 2026 | Christopher Merrywell (VP) | Sold (not open market) | $51.8K |
| Mar 13, 2026 | Frank Namdar (C-suite exec) | Sold (not open market) | $35.9K |
| Mar 13, 2026 | Drew K Anderson (C-suite exec) | Sold (not open market) | $31.9K |
Who's trading COLB
- Luis Machuca, Director: other filings, last Sep 14, 2026
- Steven R Gardner, Director: sold $404K (1 sale), last Sep 4, 2026
- Simone Lagomarsino, Director: other filings, last Sep 2, 2026
- Judi Giem, VP: other filings, last Aug 14, 2026
- Devine David Moore, C-suite exec: sold $115K (2 sales), last Jun 8, 2026
- Elizabeth Whitehead Seaton, Director: other filings, last May 14, 2026
- John F Schultz, Director: other filings, last May 14, 2026
- Mark A Finkelstein, Director: other filings, last May 14, 2026
- Eric Forrest, Director: other filings, last May 14, 2026
- Randal Lee Lund, Director: other filings, last May 14, 2026
- M Christian Mitchell, Director: other filings, last May 14, 2026
- Anddria Varnado, Director: other filings, last May 14, 2026
- Hilliard C. Terry III, Director: other filings, last May 14, 2026
- Jaynie M Studenmund, Director: other filings, last May 14, 2026
- Brock Lakely, C-suite exec: sold $5.5K (1 sale), last Apr 15, 2026
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