COLUMBIA BANKING SYSTEM, INC. (COLB) has 5 SEC Form 4 insider filings on record in the last 90 days. That includes 1 insider purchase totalling $22K. Most recent filing: Sept. 15, 2026.
| Date | Insider | Value | Shares | Stake | Pre-planned | Links |
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| Sept. 15, 2026 filed Sept. 14, 2026 | MACHUCA LUIS Director | $18,105 | 594 | 0% | No | |
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| Sept. 8, 2026 filed Sept. 4, 2026 | GARDNER STEVEN R Director | $0 | 2,577 | New | No | |
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| Sept. 4, 2026 filed Sept. 2, 2026 | LAGOMARSINO SIMONE Director | $0 | 2,670 | New | No | |
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| Aug. 18, 2026 filed Aug. 14, 2026 | Giem Judi EVP CHRO | — | +1,750 | +15% | No | |
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| July 2, 2026 filed June 30, 2026 | Deer Aaron James EVP Chief Strategy/Innov Offcr | +$22,478 | 886 | +2% | No | |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
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