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Buy COLB
Columbia Banking System Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be positive at 33.01. In total, the insiders bought 365.4K and sold 103.13K COLB shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.
Insider Power
|
33.01 |
| ● Buy | 365.4K shares |
| ● Sell | 103.13K shares |
|
55% Buy Activity
Negligible or No Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
Jun 15, 2026 Buy |
Machuca Luis Director |
563 Value: $17.4K |
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|
Jun 08, 2026 Sell |
Moore Devine David EVP Chief Marketing Officer |
60 Value: $2K |
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Jun 08, 2026 Sell |
Moore Devine David EVP Chief Marketing Officer |
3 812 Value: $113.5K |
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May 14, 2026 Buy |
Finkelstein Mark A Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Forrest Eric Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Lund Randal Lee Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Machuca Luis Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Mitchell M Christian Director |
3 949 Value: $115.0K |
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|
May 14, 2026 Buy |
Schultz John F Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Seaton Elizabeth Whitehead Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Studenmund Jaynie M Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Terry Hilliard C. Iii Director |
3 949 Value: $115.0K |
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May 14, 2026 Buy |
Varnado Anddria Director |
3 949 Value: $115.0K |
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Apr 15, 2026 Sell |
Lakely Brock EVP, Chief Accounting Officer |
396 Value: $11.5K |
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Mar 16, 2026 Buy |
Machuca Luis Director |
659 Value: $17.4K |
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|
Mar 13, 2026 Sell |
Baruffi Kumi Yamamoto EVP General Counsel, Corp Sec |
937 Value: $24.6K |
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Mar 13, 2026 Sell |
Lakely Brock EVP, Chief Accounting Officer |
211 Value: $6K |
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Mar 13, 2026 Sell |
Ognall Andrew H EVP Chief Risk Officer |
951 Value: $24.9K |
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Mar 13, 2026 Buy |
Ognall Andrew H EVP Chief Risk Officer |
2 381 Value: $62.5K |
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Mar 13, 2026 Sell |
Stein Clint Chair, CEO, President |
7 151 Value: $187.6K |
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Mar 13, 2026 Buy |
Stein Clint Chair, CEO, President |
18 171 Value: $476.6K |
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Mar 13, 2026 Buy |
Stein Clint Chair, CEO, President |
18 171 Value: $476.6K |
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Mar 13, 2026 Buy |
Anderson Drew K EVP Chief Admin Officer |
2 506 Value: $65.7K |
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Mar 13, 2026 Sell |
Deer Aaron James EVP Chief Strategy/innov Offcr |
617 Value: $16.2K |
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Mar 13, 2026 Buy |
Deer Aaron James EVP Chief Strategy/innov Offcr |
1 567 Value: $41.1K |
About Insider Power
Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.
It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.
While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.
* October 6th, 2025 - Tested on 5562 stocks
