MERCK & CO. INC. (MRK) Institutional Ownership Changes & 13F Activity

MERCK & CO. INC. (MRK). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Kahn Brothers Group, Causeway Capital Management, Sequoia Financial Advisors, Cullen Value Fund, and Dodge & Cox Stock Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2021Sound Shore ManagementSell-90,1531,258,593$97,025
Q1 2021Fairfax Financial HoldingsBuy50,000172,900$13,329
Q1 2021Dodge & Cox Stock FundSell-28,078247,086$19,048
Q1 2021Matrix Advisors Value FundBuy20,941141,878$10,937
Q1 2021Hancock Classic ValueSell-17,0528,546$659
Q1 2021Sequoia Financial AdvisorsBuy13,37460,053$4,629
Q1 2021Hillman Value FundBuy9,09767,978$5,240
Q1 2021Mairs & Power Growth FundSell-5,89875,873$5,849
Q1 2021Matrix Private Capital GroupBuy2,42810,590$823
Q1 2021Gardner Russo & QuinnSell-863,858$297
Q1 2021Semper Augustus Investments GroupBuy2944,073$3,398
Q4 2020Berkshire HathawayBuy6,294,33328,697,435$2,347,450
Q4 2020Renaissance Technologies LLCSell-1,195,52428,215$2,308
Q4 2020Sound Shore ManagementBuy299,7901,348,746$110,327
Q4 2020Fairfax Financial HoldingsBuy110,900122,900$10,053
Q4 2020Dodge & Cox Stock FundSell-32,565275,164$22,508
Q4 2020Hillman Value FundBuy20,41458,881$4,816
Q4 2020Matrix Advisors Value FundBuy7,550120,937$9,893
Q4 2020Mairs & Power Growth FundBuy2,65681,771$6,689
Q4 2020Torray FundSell-1,00114,198$1,161
Q4 2020Sequoia Financial AdvisorsSell-8246,679$3,818
Q4 2020Matrix Private Capital GroupSell-528,162$673
Q4 2020Gardner Russo & QuinnBuy93,944$323
Q3 2020Berkshire HathawayBuy22,403,10222,403,102$1,858,337
Q3 2020Renaissance Technologies LLCSell-2,516,6901,223,739$101,509
Q3 2020Sound Shore ManagementSell-441,0551,048,956$87,011
Q3 2020Sequoia Financial AdvisorsBuy46,76146,761$3,879
Q3 2020Dodge & Cox Stock FundSell-38,250307,729$25,526
Q3 2020Matrix Advisors Value FundSell-16,748113,387$9,405
Q3 2020Mairs & Power Growth FundSell-1,71579,115$6,563

Frequently asked questions about MRK activity

  • Which institutional owners are buying MRK?

    Institutional owners buying MRK include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MRK activity?

    "Buy" means an investor increased their reported position in MRK compared to the prior reporting period. This reflects growing exposure to MERCK & CO. INC. (MRK) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MRK increasing?

    Institutional interest in MRK can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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