CoverageForm 410-K10-Q8-K13D13G13F

Columbia Banking System, Inc.

COLBCIK 0000887343 · Every Form 4 filed by insiders at this issuer. See financials →

Annual report (10-K)

Latest 10-K filed Feb 26, 2026. Sentiment + YoY language diff vs prior year. Read sections →

Signal:Neutral
Risk Factors:tone -0.0333Δ+0.000395% similar+17/-12
MD&A:tone -0.0035Δ+0.004478% similar+129/-126

Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.

Recent 8-K announcements

Per-item disclosure feed. Item 2.02 is the earnings release.

Top insiders

Most active reporters at Columbia Banking System, Inc.

NameRolesFilings
Baruffi Kumi Yamamoto
Officer
25
Merrywell Christopher
Officer
23
Stein Clint
OfficerDirector
23
Deer Aaron James
Officer
21
Moore Devine David
Officer
21

Showing 1-5 of 41

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Top performers

Insiders ranked by realized 90-day signed return on their open-market trades at Columbia Banking System, Inc.. Minimum 3 scored trades. Returns are signed - a sale followed by a rally counts against the insider.

#InsiderTradesWin rateAvgMedianBestWorst
1Baruffi Kumi Yamamoto30%-13.8%-7.7%-3.2%-30.4%
2Numata S Mae Fujita30%-10.1%-10.1%-10.1%-10.1%
3Stein Clint30%-10.1%-10.1%-10.1%-10.1%
4Eerkes Craig D617%-7.4%-10.1%+6.8%-10.4%
5Deer Aaron James450%-3.6%-1.0%+4.5%-16.9%
6Nixon Torran B425%-0.4%-2.0%+9.1%-6.7%

All filings

379 Form 4 / 4-A filings, newest first

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