Logo image of MRK

MERCK & CO. INC. (MRK) Stock Ownership and Short Interest

USA - NYSE:MRK - US58933Y1055 - Common Stock

88.585 USD
+0.96 (+1.1%)
Last: 10/22/2025, 12:46:10 PM
MRK Ownership Chart.MRK Ownership Chart: showing Insider, Institutional ownership and shares available to the public.MRK Ownership.InsiderInstitutionalPublic



Shares Outstanding2.50B
Float2.50B
Float Short Interest Percentage1.11%
Owners (insider)0.05%
Owners (institutional)80.53%
Owners (insider) change0.38%
Owners (institutional) change0.01%
MRK Institutional Ownership HistoryMRK Institutional Ownership HistoryMRK Institutional Ownership History Sep 2021 Mar 2022 Sep 2022 Mar 2023 Sep 2023 Mar 2024 Sep 2024 Mar 2025 Sep 2025 1B 2B 3B
MRK Historical Insider Transactions ChartMRK Historical Insider Buy and Sell Transactions ChartMRK Historical Insider Transactions Nov 2024 Dec 2024 Jan 2025 Feb 2025 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 0 100K 200K
Date Name Type Shares Price Amount
May 3, 2025 Smart Dalton Option Excercise 2050 83.18 $ 170,519.00
May 3, 2025 Smart Dalton Option Excercise 844 83.18 $ 70,203.92
Apr 30, 2025 Smart Dalton Option Excercise 290 84.06 $ 24,375.95
Apr 30, 2025 Romanelli Joseph Option Excercise 4325 83.95 $ 363,090.85
Apr 30, 2025 Romanelli Joseph Option Excercise 2132 83.95 $ 178,984.97
Apr 30, 2025 Larson Betty D Option Excercise 11350 84.71 $ 961,458.50
Apr 30, 2025 Larson Betty D Option Excercise 5153 84.71 $ 436,510.63
Apr 30, 2025 Smart Dalton Option Excercise 845 84.06 $ 71,027.50
Apr 25, 2025 Smart Dalton Option Excercise 5000 58.08 $ 290,400.00
Apr 25, 2025 Smart Dalton Open Market Sale 4262 82.76 $ 352,723.12
Feb 19, 2025 Oosthuizen Johannes Jacobus Open Market Sale 8500 84.09 $ 714,744.60
Feb 13, 2025 Williams David Michael Open Market Sale 6000 85.34 $ 512,056.80
Feb 8, 2025 Oosthuizen Johannes Jacobus Option Excercise 13002 87.28 $ 1,134,814.56
Feb 8, 2025 Oosthuizen Johannes Jacobus Option Excercise 6404 87.28 $ 558,941.12
Feb 6, 2025 Downing Cristal N Open Market Sale 2361 88.76 $ 209,550.79
Feb 6, 2025 THULIN INGE G Open Market Purchase 2833 88.25 $ 250,012.25
Feb 5, 2025 BAKER DOUGLAS M JR Open Market Purchase 15000 88.50 $ 1,327,500.00
Jan 27, 2025 Li Dean Y Grant 32621 97.94 $ 3,194,900.74
Jan 27, 2025 Downing Cristal N Grant 9446 97.94 $ 925,141.24
Jan 27, 2025 DeLuca Richard R. Grant 25438 97.94 $ 2,491,397.72
Jan 27, 2025 Davis Robert M Grant 95275 97.94 $ 9,331,233.50
Jan 27, 2025 Chattopadhyay Sanat Grant 28136 97.94 $ 2,755,639.84
Jan 27, 2025 Guindo Chirfi Grant 28158 97.94 $ 2,757,794.52
Jan 27, 2025 Zachary Jennifer Grant 25423 97.94 $ 2,489,928.62
Jan 27, 2025 Williams David Michael Grant 10246 97.94 $ 1,003,493.24
Jan 27, 2025 Smart Dalton Grant 2586 97.94 $ 253,272.84
Jan 27, 2025 Oosthuizen Johannes Jacobus Grant 8664 97.94 $ 848,552.16
Jan 27, 2025 Litchfield Caroline Grant 23432 97.94 $ 2,294,930.08