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Buy TMO
Thermo Fisher Scientific Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -21.38. In total, the insiders bought 8.71M and sold 26.14M TMO 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
|
-21.38 |
| ● Buy | 8.71M shares |
| ● Sell | 26.14M shares |
|
44% Buy Activity
Moderate Negative Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
May 20, 2026 Buy |
Chandy Ruby R Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Chai Nelson Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Keith R. Alexandra Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Weisler Dion J Director |
499 Value: $225.4K |
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|
May 20, 2026 Sell |
Weisler Dion J Director |
80 Value: $36.3K |
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May 20, 2026 Buy |
Sperling Scott M Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Spar Debora L Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Lynch Karen S Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Harris C Martin Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Jacks Tyler Director |
499 Value: $225.4K |
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May 20, 2026 Buy |
Johnson Jennifer M Director |
499 Value: $225.4K |
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|
Apr 27, 2026 Sell |
Pettiti Gianluca President & COO |
400 Value: $185.1K |
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Mar 28, 2026 Buy |
Sperling Scott M Director |
90 Value: $42.6K |
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Mar 28, 2026 Buy |
Keith R. Alexandra Director |
66 Value: $31.3K |
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Mar 28, 2026 Buy |
Johnson Jennifer M Director |
66 Value: $31.3K |
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Mar 28, 2026 Buy |
Weisler Dion J Director |
79 Value: $37.5K |
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Mar 28, 2026 Buy |
Lynch Karen S Director |
66 Value: $31.3K |
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Mar 11, 2026 Sell |
Shafer Michael D Executive Vice President |
1 607 Value: $802.5K |
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Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
264 Value: $137.2K |
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Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
516 Value: $267.9K |
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Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
570 Value: $293.4K |
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Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
20 Value: $10.1K |
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Mar 05, 2026 Buy |
Casper Marc N Chairman & CEO |
4 000 Value: $1.24M |
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Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
214 Value: $109.5K |
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|
Mar 05, 2026 Sell |
Casper Marc N Chairman & CEO |
99 Value: $50.5K |
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
