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
Q2 2025Cullen Value FundBuy10,237120,426$9,532,899
Q2 2025Mairs & Power Growth FundBuy3,71256,871$4,501,908
Q2 2025Kahn Brothers GroupSell-1,810490,465$38,825,234
Q2 2025Matrix Private Capital GroupSell-5917,440$594,977
Q2 2025Hancock Classic ValueBuy4263,324$263,128
Q2 2025Dodge & Cox Stock FundBuy231157,300$12,451,868
Q2 2025Matrix Advisors Value FundSell-312,915$230,751
Q1 2025Renaissance Technologies LLCSell-1,159,944221,692$19,899,292
Q1 2025Causeway Capital ManagementBuy313,396897,869$80,592,684
Q1 2025Sequoia Financial AdvisorsSell-80,987280,446$25,172,820
Q1 2025Kahn Brothers GroupSell-16,633492,275$44,187,086
Q1 2025Cullen Value FundBuy12,128110,189$9,890,599
Q1 2025Mairs & Power Growth FundSell-74153,159$4,771,552
Q1 2025Matrix Private Capital GroupSell-3408,031$727,368
Q1 2025Dodge & Cox Stock FundSell-282157,069$14,098,513
Q1 2025Gardner Russo & QuinnSell-1632,763$248,013
Q1 2025Matrix Advisors Value FundBuy842,946$264,433
Q4 2024Renaissance Technologies LLCBuy295,7581,381,636$137,444,775
Q4 2024Causeway Capital ManagementSell-229,601584,473$58,143,366
Q4 2024Kahn Brothers GroupSell-71,580508,908$50,626,737
Q4 2024Sequoia Financial AdvisorsBuy32,726361,433$35,955,403
Q4 2024Hancock Classic ValueSell-3,5272,898$288,293
Q4 2024Cullen Value FundBuy2,08498,061$9,755,135
Q4 2024Dodge & Cox Stock FundSell-900157,351$15,653,277
Q4 2024Mairs & Power Growth FundBuy51353,900$5,361,972
Q4 2024Gardner Russo & QuinnSell-1612,926$291,104
Q3 2024Renaissance Technologies LLCBuy1,080,9631,085,878$123,312,541
Q3 2024Sequoia Financial AdvisorsBuy150,432328,707$37,337,217
Q3 2024Sound Shore ManagementBuy16,528547,423$62,165,356
Q3 2024Kahn Brothers GroupSell-11,423580,488$65,920,748

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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