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 13F filings (Q1 2026). 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
Q3 2024Cullen Value FundBuy3,03695,977$10,899,175
Q3 2024Mairs & Power Growth FundSell-1,46453,387$6,062,628
Q3 2024Dodge & Cox Stock FundSell-625158,251$17,970,984
Q3 2024Gardner Russo & QuinnSell-3593,087$350,548
Q2 2024Renaissance Technologies LLCSell-195,2874,915$609,688
Q2 2024Sound Shore ManagementSell-162,397530,895$65,724,801
Q2 2024Torray FundSell-31,3561,705$211,079
Q2 2024Kahn Brothers GroupSell-21,904591,911$73,278,768
Q2 2024Sequoia Financial AdvisorsBuy19,179178,275$22,078,435
Q2 2024Mairs & Power Growth FundSell-2,16654,851$6,790,554
Q2 2024Dodge & Cox Stock FundSell-1,619158,876$19,668,849
Q2 2024Cullen Value FundBuy75192,941$11,506,129
Q2 2024Meritage GroupBuy1592,292$283,750
Q2 2024Matrix Private Capital GroupBuy728,371$1,042,775
Q2 2024Gardner Russo & QuinnSell-673,446$426,592
Q1 2024Renaissance Technologies LLCBuy80,378200,202$26,417
Q1 2024Torray FundBuy31,02033,061$224,975
Q1 2024Sequoia Financial AdvisorsSell-10,864159,096$21,000,389
Q1 2024Kahn Brothers GroupSell-10,726613,815$80,992,904
Q1 2024Sound Shore ManagementSell-8,431693,292$91,479,880
Q1 2024Mairs & Power Growth FundSell-4,96757,017$7,523,393
Q1 2024Cullen Value FundBuy2,64592,190$12,017,030
Q1 2024Eagle Capital ManagementBuy1,5911,591$210
Q1 2024Meritage GroupSell-7402,133$281
Q1 2024Dodge & Cox Stock FundSell-450160,495$21,177,315
Q1 2024Matrix Advisors Value FundSell-4252,862$377,641
Q1 2024Gardner Russo & QuinnSell-2933,513$463,550
Q1 2024Matrix Private Capital GroupSell-1648,299$1,101,443
Q1 2024Semper Augustus Investments GroupSell-13244,443$5,864,254
Q4 2023Renaissance Technologies LLCSell-247,819119,824$13,063

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.

Related MRK insights