Dudediligence.

Columbia Banking System, Inc

COLBNASDAQ · State Commercial Banks
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$647,148

4 notices · 22,078 sh

Oct 2025 to Oct 2026

Reported ·

$677,279

7 sales · 0 buys

Oct 2025 to Jun 2026

The two figures cover different periods.

2 of 7 reported sales carry the 10b5-1 box. Together they are under 0.01% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-06-08: Moore Devine David, Form 1442026-03-04: Nixon Torran B, Form 1442026-03-03: Nixon Torran B, Form 1442026-01-30: GARDNER STEVEN R, Form 1442026-01-30: GARDNER STEVEN R, sold2026-03-03: Nixon Torran B, sold2026-03-13: BARUFFI KUMI YAMAMOTO, sold2026-03-13: Lakely Brock, sold2026-06-08: Moore Devine David, sold
under a no plan named▼ salesize is dollars

Form 144 notices, newest first

2026-06-08Moore Devine David, EVP Chief Marketing Officer$115,289
3,872 shno plan date144 ↗
Form 4, 2026-06-10: sold 3,872 at $29.78 Form 4 ↗
2026-03-04Nixon Torran B, Senior Executive VP$64,624
2,240 shplan 2025-11-25no Form 4 on file144 ↗
2026-03-03Nixon Torran B, Senior Executive VP$63,308
2,241 shplan 2025-11-25144 ↗
Form 4, 2026-03-05: sold 4,481 at $28.55 Form 4 ↗
2026-01-30GARDNER STEVEN R, Director$403,927
13,725 shno plan date144 ↗
Form 4, 2026-02-03: sold 13,725 at $29.43 Form 4 ↗