MERCK & CO. INC. (MRK) Stock Ownership

NYSE:MRK • US58933Y1055

124.41 USD
+0.59 (+0.48%)
Last: Feb 24, 2026, 01:53 PM
MRK Ownership Chart.MRK Ownership Chart: showing Insider, Institutional ownership and shares available to the public.MRK Ownership.InsiderInstitutionalPublic



Shares Outstanding2.48B
Float2.48B
Float Short Interest Percentage1.16%
Owners (insider)0.05%
Owners (institutional)80.32%
Owners (insider) change-0.69%
Owners (institutional) change-1.74%
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 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 0 100K -100K -200K -300K
Date Name Type Shares Price Amount
Feb 12, 2026 Guindo Chirfi Open Market Sale 10000 121.46 $ 1,214,562.00
Feb 10, 2026 Li Dean Y Open Market Sale 10235 117.52 $ 1,202,843.81
Feb 9, 2026 Guindo Chirfi Open Market Sale 10000 118.41 $ 1,184,101.00
Feb 9, 2026 Zachary Jennifer Option Excercise 121573 119.15 $ 14,485,690.41
Feb 9, 2026 Zachary Jennifer Open Market Sale 121573 119.15 $ 14,485,690.41
Feb 6, 2026 Williams David Michael Option Excercise 5000 77.62 $ 388,100.00
Feb 6, 2026 Williams David Michael Open Market Sale 5000 121.91 $ 609,525.00
Feb 6, 2026 Oosthuizen Johannes Jacobus Open Market Sale 15000 121.87 $ 1,827,991.50
Feb 6, 2026 DeLuca Richard R. Open Market Sale 37685 120.92 $ 4,557,024.71
Feb 5, 2026 Guindo Chirfi Open Market Sale 20000 121.88 $ 2,437,676.00
Feb 4, 2026 Smart Dalton Option Excercise 4000 62.07 $ 248,280.00
Feb 4, 2026 Smart Dalton Open Market Sale 6400 119.68 $ 765,920.00
Feb 4, 2026 Litchfield Caroline Option Excercise 41997 53.06 $ 2,228,360.82
Feb 4, 2026 Litchfield Caroline Open Market Sale 41997 119.61 $ 5,023,311.57
Feb 4, 2026 Li Dean Y Option Excercise 15087 56.04 $ 845,475.48
Feb 4, 2026 Li Dean Y Open Market Sale 15087 118.77 $ 1,791,824.15
Feb 4, 2026 Davis Robert M Open Market Sale 47434 118.04 $ 5,599,327.27
Jan 26, 2026 Davis Robert M Grant 47434 107.40 $ 5,094,411.60
Jan 26, 2026 Chattopadhyay Sanat Grant 13880 107.40 $ 1,490,712.00
Jan 26, 2026 Williams David Michael Grant 6112 107.40 $ 656,428.80
Jan 26, 2026 Smart Dalton Grant 1066 107.40 $ 114,488.40
Jan 26, 2026 Romanelli Joseph Grant 5703 107.40 $ 612,502.20
Jan 26, 2026 Oosthuizen Johannes Jacobus Grant 5026 107.40 $ 539,792.40
Jan 26, 2026 Litchfield Caroline Grant 15852 107.40 $ 1,702,504.80
Jan 26, 2026 Li Dean Y Grant 20469 107.40 $ 2,198,370.60
Jan 26, 2026 Guindo Chirfi Grant 9865 107.40 $ 1,059,501.00
Jan 26, 2026 DeLuca Richard R. Grant 12264 107.40 $ 1,317,153.60
Jan 26, 2026 Zachary Jennifer Grant 11583 107.40 $ 1,244,014.20
Nov 10, 2025 Downing Cristal N Open Market Sale 7085 87.00 $ 616,395.00
Nov 3, 2025 Williams David Michael Open Market Sale 8614 83.59 $ 720,039.95
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 845 84.06 $ 71,027.50
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 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