Institutional shares held 1.93 Billion
26.2M calls
23.5M puts
Total value of holdings $156B
$2.12B calls
$1.9B puts
Market Cap $205B
2,533,280,000 Shares Out.
Institutional ownership 76.23%
# of Institutions 3,897


Latest Institutional Activity in MRK

Top Purchases

Q2 2025
Sage Capital Advisors,Llc Shares Held: 51.1K ($4.13M)
Q2 2025
Cullen Investment Group, Ltd. Shares Held: 120K ($9.75M)
Q2 2025
Hbw Advisory Services LLC Shares Held: 33K ($2.67M)
Q2 2025
Kera Capital Partners, Inc. Shares Held: 8.27K ($669K)
Q2 2025
City Center Advisors, LLC Shares Held: 3K ($243K)

Top Sells

Q2 2025
Neville Rodie & Shaw Inc Shares Held: 143K ($11.5M)
Q2 2025
Arvest Investments, Inc. Shares Held: 40K ($3.24M)
Q2 2025
Garde Capital, Inc. Shares Held: 2.21K ($179K)
Q2 2025
Harbor Investment Advisory, LLC Shares Held: 16.5K ($1.34M)
Q2 2025
Jacobs & CO Shares Held: 111K ($8.98M)

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
381K Shares
From 18 Insiders
Open market or private purchase 17.8K shares
Grant, award, or other acquisition 289K shares
Exercise of conversion of derivative security 73.5K shares
Sell / Disposition
53.4K Shares
From 9 Insiders
Payment of exercise price or tax liability 32.2K shares
Open market or private sale 21.1K shares

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