As of the latest Form 4 filed Jul 2, 2026.
What Columbia Banking System Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 46 most recent filings for COLB.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-02 | 2026-06-30 | Deer Aaron James EVP Chief Strategy/Innov Offcr | PPurchase | +886.00 | $25.37 | $22.5K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Moore Devine David EVP Chief Marketing Officer | SSale | −3.81K | $29.78 | $114K | No | Form 4 ↗ |
| 2026-06-10 | 2026-06-08 | Moore Devine David, EVP Chief Marketing Officer | SSale | −60.00 | $29.77 | $1.79K | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Lund Randal Lee Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Forrest Eric Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | SEATON ELIZABETH WHITEHEAD Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Finkelstein Mark A Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Terry Hilliard C. III Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | MITCHELL M CHRISTIAN Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | STUDENMUND JAYNIE M Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | MACHUCA LUIS Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Varnado Anddria Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | SCHULTZ JOHN F Director | AAward | +3.95K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Lakely Brock EVP, Chief Accounting Officer | FTax | −396.00 | $29.10 | $11.5K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Anderson Drew K EVP Chief Admin Officer | FTax | −1.22K | $26.23 | $31.9K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Anderson Drew K, EVP Chief Admin Officer | MExercise | +2.51K | $26.23 | $65.7K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Deer Aaron James EVP Chief Strategy/Innov Offcr | FTax | −617.00 | $26.23 | $16.2K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Deer Aaron James, EVP Chief Strategy/Innov Offcr | MExercise | +1.57K | $26.23 | $41.1K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Moore Devine David EVP Chief Marketing Officer | FTax | −376.00 | $26.23 | $9.86K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Moore Devine David, EVP Chief Marketing Officer | MExercise | +940.00 | $26.23 | $24.7K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Merrywell Christopher Senior Executive VP | FTax | −1.97K | $26.23 | $51.8K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Merrywell Christopher, Senior Executive VP | MExercise | +5.01K | $26.23 | $131K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Namdar Frank EVP Chief Credit Officer | FTax | −1.37K | $26.23 | $35.9K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Namdar Frank, EVP Chief Credit Officer | MExercise | +2.82K | $26.23 | $74.0K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Lakely Brock EVP, Chief Accounting Officer | SSale | −211.00 | $26.23 | $5.53K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Lakely Brock, EVP, Chief Accounting Officer | MExercise | +846.00 | $26.23 | $22.2K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Nixon Torran B Senior Executive VP | FTax | −2.00K | $26.23 | $52.5K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Nixon Torran B, Senior Executive VP | MExercise | +5.01K | $26.23 | $131K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | BARUFFI KUMI YAMAMOTO EVP General Counsel, Corp Sec | SSale | −937.00 | $26.23 | $24.6K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | BARUFFI KUMI YAMAMOTO, EVP General Counsel, Corp Sec | MExercise | +2.38K | $26.23 | $62.5K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | OGNALL ANDREW H EVP Chief Risk Officer | FTax | −951.00 | $26.23 | $24.9K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | OGNALL ANDREW H, EVP Chief Risk Officer | MExercise | +2.38K | $26.23 | $62.5K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Stein Clint Chair, CEO, President | FTax | −7.15K | $26.23 | $188K | No | Form 4 ↗ |
| 2026-03-17 | 2026-03-13 | Stein Clint, Chair, CEO, President | MExercise | +18.2K | $26.23 | $477K | No | Form 4 ↗ |
| 2026-03-05 | 2026-03-04 | Nixon Torran B Senior Executive VP | SSale | −2.24K | $28.85 | $64.6K | Yes (planned) | Form 4 ↗ |
| 2026-03-05 | 2026-03-03 | Nixon Torran B, Senior Executive VP | SSale | −2.24K | $28.25 | $63.3K | Yes (planned) | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Deer Aaron James EVP Chief Strategy/Innov Offcr | FTax | −918.00 | $28.45 | $26.1K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Namdar Frank EVP Chief Credit Officer | FTax | −1.81K | $28.45 | $51.4K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Nixon Torran B Senior Executive VP | FTax | −2.98K | $28.45 | $84.8K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Stein Clint Chair, President, CEO | FTax | −9.79K | $28.45 | $278K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | OGNALL ANDREW H EVP Chief Risk Officer | FTax | −1.30K | $28.45 | $37.1K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Merrywell Christopher Senior Executive VP | FTax | −3.23K | $28.45 | $91.9K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Lakely Brock EVP, Chief Accounting Officer | FTax | −391.00 | $28.45 | $11.1K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Moore Devine David EVP Chief Marketing Officer | FTax | −838.00 | $28.45 | $23.8K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | BARUFFI KUMI YAMAMOTO EVP General Counsel, Corp Sec | FTax | −1.80K | $28.45 | $51.2K | No | Form 4 ↗ |
| 2026-03-02 | 2026-03-01 | Anderson Drew K EVP Chief Admin Officer | FTax | −1.81K | $28.45 | $51.4K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also COLB’s full analysis or the market-wide insider trading feed. The tabs above jump to COLB’s other SEC data.
Source: SEC Form 4 filings for COLB, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.