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Columbia Banking System, Inc. (NASDAQ:COLB)
US · Delayed Price · Currency is USD
Financial Services · Banks - Regional
31.06+0.20 (+0.66%)
Insider Score
––Not scored
COLB Insider Score
Insiders here have filed 4 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
COLB Stock Insider Trading Activity
COLB stock’s insider trading shows 1 purchase for an estimated $22.48K and 2 sales on the open market for an estimated $115.31K by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| GARDNER STEVEN R Director | Award | 2,577 | — | — | New | 2,577 | Sep 4, 2026 | — | Form 4 |
| LAGOMARSINO SIMONE Director | Award | 2,670 | — | — | New | 2,670 | Sep 2, 2026 | — | Form 4 |
| Giem Judi Other | Option exercise | 2,393 | $32.69 | $78.23K | New | 2,393 | Aug 14, 2026 | — | Form 4 |
| Giem Judi Other | Tax withheld | 643 | $32.69 | $21.02K | 26.9% | 1,750 | Aug 14, 2026 | — | Form 4 |
| Deer Aaron James Other | Buy | 886 | $25.37 | $22.48K | 2.1% | 42,761 | Jun 30, 2026 | DFirst BuyExec BuyDilution | Form 4 |
| Moore Devine David Other | Sell | 3,812 | $29.78 | $113.52K | 17.0% | 18,636 | Jun 8, 2026 | — | Form 4 |
| Moore Devine David Other | Sell | 60 | $29.77 | $1.79K | 0.3% | 22,448 | Jun 8, 2026 | — | Form 4 |
| SEATON ELIZABETH WHITEHEAD Director | Award | 3,949 | — | — | New | 3,949 | May 14, 2026 | — | Form 4 |
| SCHULTZ JOHN F Director | Award | 3,949 | — | — | 8.5% | 50,384 | May 14, 2026 | — | Form 4 |
| MITCHELL M CHRISTIAN Director | Award | 3,949 | — | — | 10.4% | 41,909 | May 14, 2026 | — | Form 4 |
| MACHUCA LUIS Director | Award | 3,949 | — | — | 15.2% | 29,953 | May 14, 2026 | — | Form 4 |
| Terry Hilliard C. III Director | Award | 3,949 | — | — | 7.7% | 55,514 | May 14, 2026 | — | Form 4 |
| Forrest Eric Director | Award | 3,949 | — | — | 12.2% | 36,351 | May 14, 2026 | — | Form 4 |
| Finkelstein Mark A Director | Award | 3,949 | — | — | 12.5% | 35,554 | May 14, 2026 | — | Form 4 |
| Varnado Anddria Director | Award | 3,949 | — | — | 14.7% | 30,894 | May 14, 2026 | — | Form 4 |
| Lund Randal Lee Director | Award | 3,949 | — | — | 16.7% | 27,663 | May 14, 2026 | — | Form 4 |
| STUDENMUND JAYNIE M Director | Award | 3,949 | — | — | 22.1% | 21,807 | May 14, 2026 | — | Form 4 |
| Lakely Brock Other | Tax withheld | 396 | $29.10 | $11.52K | 3.6% | 10,708 | Apr 15, 2026 | — | Form 4 |
| Anderson Drew K Other | Tax withheld | 1,215 | $26.23 | $31.87K | 5.2% | 21,969 | Mar 13, 2026 | — | Form 4 |
| Moore Devine David Other | Option exercise | 940 | $26.23 | $24.66K | 4.3% | 22,884 | Mar 13, 2026 | — | Form 4 |
| Anderson Drew K Other | Option exercise | 2,506 | $26.23 | $65.73K | 12.1% | 23,184 | Mar 13, 2026 | — | Form 4 |
| BARUFFI KUMI YAMAMOTO Other | Sell | 937 | $26.23 | $24.58K | 1.7% | 53,715 | Mar 13, 2026 | — | Form 4 |
| BARUFFI KUMI YAMAMOTO Other | Option exercise | 2,381 | $26.23 | $62.45K | 4.6% | 54,652 | Mar 13, 2026 | — | Form 4 |
| Nixon Torran B Other | Option exercise | 5,013 | $26.23 | $131.49K | 5.1% | 103,242 | Mar 13, 2026 | — | Form 4 |
| Nixon Torran B Other | Tax withheld | 2,002 | $26.23 | $52.51K | 1.9% | 101,240 | Mar 13, 2026 | — | Form 4 |
| OGNALL ANDREW H Other | Option exercise | 2,381 | $26.23 | $62.45K | 3.3% | 75,083 | Mar 13, 2026 | — | Form 4 |
| OGNALL ANDREW H Other | Tax withheld | 951 | $26.23 | $24.94K | 1.3% | 74,132 | Mar 13, 2026 | — | Form 4 |
| Merrywell Christopher Other | Option exercise | 5,013 | $26.23 | $131.49K | 12.2% | 46,040 | Mar 13, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.