Institutional shares held 1.95 Billion
28.3M calls
29.6M puts
Total value of holdings $157B
$2.28B calls
$2.38B puts
Market Cap $203B
2,533,280,000 Shares Out.
Institutional ownership 77.13%
# of Institutions 3,828


Latest Institutional Activity in MRK

Top Purchases

Q2 2025
Dld Asset Management, LP Shares Held: 36.5M ($2.93B)
Q2 2025
Norges Bank Shares Held: 36.1M ($2.9B)
Q2 2025
Franklin Resources Inc Shares Held: 27M ($2.17B)
Q2 2025
Arrowstreet Capital, Limited Partnership Shares Held: 19.5M ($1.56B)
Q2 2025
Charles Schwab Investment Management Inc Shares Held: 53.9M ($4.33B)

Top Sells

Q2 2025
Raymond James Financial Inc Shares Held: 7.64M ($613M)
Q2 2025
Wellington Management Group LLP Shares Held: 76.9M ($6.17B)
Q2 2025
Ubs Group Ag Shares Held: 16.9M ($1.36B)
Q2 2025
Bank Of America Corp Shares Held: 28M ($2.25B)
Q2 2025
Nuveen, LLC Shares Held: 8.02M ($644M)

About MRK

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, manufactures, and markets veterinary pharmaceuticals, vaccines, and health management solutions and services, as well as digitally connected identification, traceability, and monitoring products. It serves drug wholesalers and retailers, hospitals, and government agencies; managed health care providers, such as health maintenance organizations, pharmacy benefit managers, and other institutions; and physicians and physician distributors, veterinarians, and animal producers. The company has collaborations with AstraZeneca PLC; Bayer AG; Eisai Co., Ltd.; Ridgeback Biotherapeutics; and Gilead Sciences, Inc. to jointly develop and commercialize long-acting treatments in HIV. Merck & Co., Inc. was founded in 1891 and is headquartered in Kenilworth, New Jersey.


Insider Transactions at MRK

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
398K Shares
From 19 Insiders
Open market or private purchase 17.8K shares
Grant, award, or other acquisition 289K shares
Exercise of conversion of derivative security 90.6K shares
Sell / Disposition
62.6K Shares
From 10 Insiders
Payment of exercise price or tax liability 41.4K shares
Open market or private sale 21.1K shares

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