COLB insider buying and SEC filings, explained
Columbia Banking System, Inc. · CIK 887343
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$22K
Insiders who bought
1
Sold (not marked 10b5-1)
$848K
Planned sales (10b5-1)
$128K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 29, 2026 | Sale | Steven R. Gardner (Director) sold 10,522 shares at about $31.23 ($329K). Holdings down 80% to 2,577 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Oct 30, 2026, 6:48 PM ET |
| Jun 30, 2026 | Purchase (code P) | Aaron James Deer (EVP Chief Strategy/Innov Offcr) bought 886 shares at $25.37 ($22K), reported as a purchase (code P). Holdings up 2% to 42,761 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jul 2, 2026 |
| Jun 8, 2026 | Sale | Devine David Moore (EVP Chief Marketing Officer) sold 3,872 shares at about $29.78 ($115K). Holdings down 17% to 18,636 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 10, 2026 |
| Mar 3–4, 2026 | Planned (10b5-1) | Torran B Nixon (Senior Executive VP) sold 4,481 shares between Mar 3 and Mar 4 at about $28.55 ($128K), marked as a 10b5-1 plan trade. Holdings down 4% to 98,229 shares. | SEC filing Filed Mar 5, 2026 |
| Jan 30, 2026 | Sale | Steven R. Gardner (Director) sold 13,725 shares indirectly (by retirement or benefit plan) at $29.43 ($404K). Holdings by retirement or benefit plan down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 3, 2026 |
81 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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