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Buy MRK
Merck Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be positive at 25.72. In total, the insiders bought 9.46B and sold 82.67K MRK 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
|
25.72 |
| ● Buy | 9.46B shares |
| ● Sell | 82.67K shares |
|
82% Buy Activity
Weak Negative Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
May 29, 2026 Buy |
Karsanbhai Surendralal Lanca Director |
1 853 Value: $220.0K |
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|
May 29, 2026 Buy |
Thulin Inge G Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Seidman Christine E Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Rothman Paul Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Lavizzo-mourey Risa J Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Baker Douglas M Jr Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Craig Pamela J. Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Glocer Thomas H Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Mayo Stephen Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Russo Patricia F Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Coe Mary Ellen Director |
1 853 Value: $220.0K |
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May 29, 2026 Buy |
Warden Kathy J Director |
1 853 Value: $220.0K |
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May 05, 2026 Buy |
Maraldo David R. EVP & Pres. Mmd |
7 424 Value: $840.1K |
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May 05, 2026 Buy |
Oosthuizen Johannes Jacobus EVP, Oncology & Int?l |
10 605 Value: $1.20M |
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May 05, 2026 Buy |
Smart Dalton E. Iii SVP Fin. - Global Controller |
2 298 Value: $260.0K |
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May 05, 2026 Buy |
Guindo Chirfi EVP, Access, Policy & Comms |
6 628 Value: $750.0K |
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May 05, 2026 Buy |
Li Dean Y Executive Vp & President, Mrl |
58 207 Value: $6.59M |
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May 05, 2026 Buy |
Larson Betty D EVP, Chief Hr Officer |
23 283 Value: $2.63M |
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May 05, 2026 Buy |
Deluca Richard R. EVP&pres, Merck Animal Heallth |
34 924 Value: $3.95M |
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May 05, 2026 Buy |
Davis Robert M Chairman, CEO & President |
139 697 Value: $15.8M |
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May 05, 2026 Buy |
Davis Robert M Chairman, CEO & President |
47 724 Value: $5.40M |
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May 05, 2026 Buy |
Foard Brian EVP, Specialty, Pharma, & Id |
35 351 Value: $4.00M |
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May 05, 2026 Buy |
Foard Brian EVP, Specialty, Pharma, & Id |
31 044 Value: $3.51M |
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May 05, 2026 Buy |
Williams David Michael EVP,chief Info&digital Officer |
4 640 Value: $525.1K |
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May 05, 2026 Buy |
Zachary Jennifer EVP, General Counsel |
35 312 Value: $4.00M |
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
