O'Brien Greene & Co. Inc Merck & Co., Inc. Transaction History
O'Brien Greene & Co. Inc
- $306 Million
- Q3 2025
A detailed history of O'Brien Greene & Co. Inc transactions in Merck & Co., Inc. stock. As of the latest transaction made, O'Brien Greene & Co. Inc holds 4,482 shares of MRK stock, worth $416,198. This represents 0.12% of its overall portfolio holdings.
Number of Shares
4,482
Previous 4,661
3.84%
Holding current value
$416,198
Previous $368,000
2.17%
% of portfolio
0.12%
Previous 0.13%
Shares
16 transactions
Others Institutions Holding MRK
# of Institutions
3,878Shares Held
1.9BCall Options Held
31.1MPut Options Held
28.5M-
Vanguard Group Inc Valley Forge, PA252MShares$23.4 Billion0.33% of portfolio
-
Black Rock Inc. New York, NY207MShares$19.2 Billion0.59% of portfolio
-
State Street Corp Boston, MA118MShares$11 Billion0.35% of portfolio
-
Wellington Management Group LLP Boston, MA75.3MShares$6.99 Billion1.16% of portfolio
-
Geode Capital Management, LLC Boston, MA59.8MShares$5.55 Billion0.33% of portfolio
About Merck & Co., Inc.
- Ticker MRK
- Exchange NYSE
- Sector Healthcare
- Industry Drug Manufacturers—General
- Shares Outstandng 2,533,280,000
- Market Cap $235B
- Description
- 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, ...