NYSE:MRK

Merck Stock Insider Trading

Healthcare > Drug Manufacturers - General

Buy MRK

*Your capital is at risk

$120.78

+1.69 (+1.41%)

At Close: Jun 11, 2026

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 (Last 100 transactions)	25.72
● Buy	9.46B shares
● Sell	82.67K shares
82% Buy Activity Weak Negative Correlation
Buy Signal Medium Confidence May 05, 2026 Analysis Breakdown: Supported by a positive Insider Power Score of 25.72. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (82% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Apr 30, 2026 Buy	Restricted Stock Unit M-Exempt	Larson Betty D EVP, Chief Hr Officer	Officer	11 350 Value: $1.24M
Apr 29, 2026 Buy	Restricted Stock Unit	Maraldo David R. EVP & Pres. Mmd	Officer	2 361 Value: $262.1K
Apr 29, 2026 Buy	Stock Option (Right to Buy)	Maraldo David R. EVP & Pres. Mmd	Officer	8 060 Value: $682.8K
Apr 29, 2026 Sell	Common Stock F-InKind	Oosthuizen Johannes Jacobus EVP, Oncology & Int?l	Officer	679 Value: $74.7K
Apr 29, 2026 Buy	Common Stock M-Exempt	Oosthuizen Johannes Jacobus EVP, Oncology & Int?l	Officer	1 377 Value: $151.5K
Apr 29, 2026 Sell	Common Stock F-InKind	Davis Robert M Chairman, CEO & President	CEO / President	6 551 Value: $720.8K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Litchfield Caroline EVP & CFO	C-Suite Officer	3 935 Value: $436.9K
Apr 29, 2026 Buy	Common Stock M-Exempt	Litchfield Caroline EVP & CFO	C-Suite Officer	3 935 Value: $433.0K
Apr 29, 2026 Sell	Common Stock F-InKind	Larson Betty D EVP, Chief Hr Officer	Officer	715 Value: $78.7K
Apr 29, 2026 Buy	Common Stock M-Exempt	Larson Betty D EVP, Chief Hr Officer	Officer	2 085 Value: $229.4K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Zachary Jennifer EVP, General Counsel	Officer	2 951 Value: $327.6K
Apr 29, 2026 Buy	Common Stock M-Exempt	Zachary Jennifer EVP, General Counsel	Officer	2 951 Value: $324.7K
Apr 29, 2026 Sell	Common Stock F-InKind	Li Dean Y Executive Vp & President, Mrl	CEO / President	2 326 Value: $255.9K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Smart Dalton E. Iii SVP Fin. - Global Controller	Officer	944 Value: $104.8K
Apr 29, 2026 Sell	Common Stock F-InKind	Williams David Michael EVP,chief Info&digital Officer	Officer	679 Value: $74.7K
Apr 29, 2026 Buy	Common Stock M-Exempt	Williams David Michael EVP,chief Info&digital Officer	Officer	1 377 Value: $151.5K
Apr 29, 2026 Sell	Common Stock F-InKind	Chattopadhyay Sanat Exe V-p & Pres. Mmd	Officer	1 130 Value: $124.3K
Apr 29, 2026 Buy	Common Stock M-Exempt	Chattopadhyay Sanat Exe V-p & Pres. Mmd	Officer	2 597 Value: $285.7K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Guindo Chirfi EVP, Access, Policy & Comms	Officer	1 967 Value: $218.4K
Apr 29, 2026 Sell	Common Stock F-InKind	Guindo Chirfi EVP, Access, Policy & Comms	Officer	969 Value: $106.6K
Apr 29, 2026 Buy	Common Stock M-Exempt	Guindo Chirfi EVP, Access, Policy & Comms	Officer	1 967 Value: $216.4K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Chattopadhyay Sanat Exe V-p & Pres. Mmd	Officer	2 597 Value: $288.3K
Apr 29, 2026 Buy	Common Stock M-Exempt	Deluca Richard R. EVP&pres, Merck Animal Heallth	Officer	2 518 Value: $277.1K
Apr 29, 2026 Sell	Common Stock F-InKind	Deluca Richard R. EVP&pres, Merck Animal Heallth	Officer	1 241 Value: $136.5K
Apr 29, 2026 Buy	Restricted Stock Unit M-Exempt	Deluca Richard R. EVP&pres, Merck Animal Heallth	Officer	2 518 Value: $279.5K

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

ABOUT MERCK & COMPANY INC

Merck & Co., Inc. operates as a healthcare company worldwide. It operates through two segments, Pharmaceutical and Animal Health. The Pharmaceutical segment offers human health pharmaceutical products in the areas of oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, and diabetes, as well as vaccine products, such as preventive pediatric, adolescent, and adult vaccines. The Animal Health segment discovers, develops...

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