Columbia Banking System (NASDAQ: COLB) insider transactions
In the twelve months to 10 November 2026, executives and directors of Columbia Banking System reported 14 open-market sales of 33,748 shares ($1.0m) and 1 open-market purchase of 886 shares ($22,478), by 6 people, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −484 | $31.22 | 12,615 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −100 | $31.22 | 12,515 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −5,012 | $31.23 | 7,503 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −200 | $31.23 | 7,303 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −2,151 | $31.24 | 5,152 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −322 | $31.24 | 4,830 | Form 4 |
| 29 October 2026 | Gardner Steven R | Director | Open-market sale | −2,253 | $31.25 | 2,577 | Form 4 |
| 4 September 2026 | Gardner Steven R | Director | Grant or award | +2,577 | — | 2,577 | Form 4 |
| 2 September 2026 | Lagomarsino Simone | Director | Grant or award | +2,670 | — | 2,670 | Form 4 |
| 14 August 2026 | Giem Judi | EVP Chro | Option exercise | +2,393 | $32.69 | 2,393 | Form 4 |
| 14 August 2026 | Giem Judi | EVP Chro | Shares withheld for tax | −643 | $32.69 | 1,750 | Form 4 |
| 30 June 2026 | Deer Aaron James | EVP Chief Strategy/Innov Offcr | Open-market purchase | +886 | $25.37 | 42,761 | Form 4 |
| 8 June 2026 | Moore Devine David | EVP Chief Marketing Officer | Open-market sale | −60 | $29.77 | 22,448 | Form 4 |
| 8 June 2026 | Moore Devine David | EVP Chief Marketing Officer | Open-market sale | −3,812 | $29.78 | 18,636 | Form 4 |
| 14 May 2026 | Schultz John F | Director | Grant or award | +3,949 | — | 50,384 | Form 4 |
| 14 May 2026 | Varnado Anddria | Director | Grant or award | +3,949 | — | 30,894 | Form 4 |
| 14 May 2026 | Machuca Luis | Director | Grant or award | +3,949 | — | 29,953 | Form 4 |
| 14 May 2026 | Studenmund Jaynie M | Director | Grant or award | +3,949 | — | 21,807 | Form 4 |
| 14 May 2026 | Mitchell M Christian | Director | Grant or award | +3,949 | — | 41,909 | Form 4 |
| 14 May 2026 | Terry Hilliard C. III | Director | Grant or award | +3,949 | — | 55,514 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Columbia Banking System page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.