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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 |
|---|---|---|---|---|
|
Apr 29, 2026 Buy |
Williams David Michael EVP,chief Info&digital Officer |
1 377 Value: $152.9K |
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|
Apr 29, 2026 Buy |
Smart Dalton E. Iii SVP Fin. - Global Controller |
944 Value: $103.9K |
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Apr 29, 2026 Sell |
Smart Dalton E. Iii SVP Fin. - Global Controller |
324 Value: $35.6K |
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Apr 29, 2026 Buy |
Li Dean Y Executive Vp & President, Mrl |
4 722 Value: $519.6K |
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Apr 29, 2026 Buy |
Li Dean Y Executive Vp & President, Mrl |
4 722 Value: $524.2K |
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|
Apr 29, 2026 Sell |
Zachary Jennifer EVP, General Counsel |
1 454 Value: $160.0K |
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Apr 29, 2026 Buy |
Larson Betty D EVP, Chief Hr Officer |
2 085 Value: $231.5K |
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Apr 29, 2026 Sell |
Litchfield Caroline EVP & CFO |
1 938 Value: $213.2K |
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Apr 29, 2026 Buy |
Davis Robert M Chairman, CEO & President |
13 300 Value: $1.46M |
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Apr 29, 2026 Buy |
Davis Robert M Chairman, CEO & President |
13 300 Value: $1.48M |
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Apr 29, 2026 Buy |
Oosthuizen Johannes Jacobus EVP, Oncology & Int?l |
1 377 Value: $152.9K |
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Mar 31, 2026 Buy |
Seidman Christine E Director |
68 Value: $8K |
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Mar 31, 2026 Buy |
Glocer Thomas H Director |
405 Value: $48.8K |
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Mar 31, 2026 Buy |
Coe Mary Ellen Director |
249 Value: $30.0K |
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Mar 02, 2026 Buy |
Foard Brian Officer |
0 Value: $0 |
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Feb 12, 2026 Sell |
Guindo Chirfi Chief Marketing Officer |
10 000 Value: $1.21M |
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Feb 10, 2026 Sell |
Li Dean Y Executive Vp & President, Mrl |
10 235 Value: $1.20M |
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Feb 09, 2026 Sell |
Zachary Jennifer EVP, General Counsel |
38 835 Value: $4.63M |
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Feb 09, 2026 Buy |
Zachary Jennifer EVP, General Counsel |
25 946 Value: $3.09M |
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Feb 09, 2026 Buy |
Zachary Jennifer EVP, General Counsel |
38 835 Value: $4.63M |
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Feb 09, 2026 Buy |
Zachary Jennifer EVP, General Counsel |
56 792 Value: $6.77M |
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Apr 30, 2025 Buy |
Maraldo David R. EVP & Pres. Mmd |
8 789 Value: $1.14M |
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May 02, 2024 Buy |
Maraldo David R. EVP & Pres. Mmd |
8 990 Value: $1.06M |
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May 03, 2023 Buy |
Maraldo David R. EVP & Pres. Mmd |
9 709 Value: $845.7K |
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May 04, 2022 Buy |
Maraldo David R. EVP & Pres. Mmd |
9 465 Value: $697.9K |
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
