REGENERON PHARMACEUTICALS (REGN) Institutional Ownership Changes & 13F Activity

REGENERON PHARMACEUTICALS (REGN) 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 Dodge & Cox Stock Fund, Renaissance Technologies LLC, Longleaf Partners, Sound Shore Management, and Parnassus Endeavor Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2019ARK InvestBuy11,48040,073$11,116
Q2 2019Parnassus Endeavor FundBuy465,000625,000$195,625
Q2 2019Renaissance Technologies LLCBuy129,700337,962$105,782
Q2 2019Polen Capital ManagementSell-17,4481,585,113$496,140
Q2 2019ARK InvestBuy15,35628,593$8,950
Q1 2019Parnassus Endeavor FundBuy160,000160,000$65,699
Q1 2019Renaissance Technologies LLCSell-141,600208,262$85,517
Q1 2019Polen Capital ManagementBuy117,3061,602,561$658,044
Q1 2019ARK InvestSell-68413,237$5,435
Q4 2018Renaissance Technologies LLCBuy81,800349,862$130,673
Q4 2018ARK InvestSell-9,31913,921$5,199
Q4 2018Polen Capital ManagementSell-3,2371,485,255$554,743
Q3 2018Renaissance Technologies LLCSell-214,408268,062$108,308
Q3 2018Polen Capital ManagementBuy4,8581,488,492$601,410
Q3 2018ARK InvestBuy4,65823,240$9,390
Q2 2018Polen Capital ManagementBuy64,4931,483,634$511,839
Q2 2018ARK InvestBuy15,25718,582$6,411
Q1 2018Renaissance Technologies LLCSell-97,092482,470$166,143
Q1 2018Polen Capital ManagementBuy29,5961,419,141$488,695
Q1 2018ARK InvestBuy5643,325$1,145
Q4 2017Renaissance Technologies LLCBuy485,600579,562$217,892
Q4 2017Polen Capital ManagementBuy15,9311,389,545$522,413
Q4 2017ARK InvestBuy5302,761$1,038
Q3 2017Polen Capital ManagementSell-212,7061,373,614$614,170
Q3 2017Renaissance Technologies LLCSell-138,11493,962$42,012
Q3 2017ARK InvestBuy9972,231$998
Q3 2017Sequoia Financial AdvisorsSell-153559$250
Q2 2017Polen Capital ManagementBuy108,4131,586,320$779,105
Q2 2017ARK InvestBuy5441,234$606
Q2 2017Sequoia Financial AdvisorsBuy12712$350

Frequently asked questions about REGN activity

  • Which institutional owners are buying REGN?

    Institutional owners buying REGN 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 REGN activity?

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

  • Is institutional interest in REGN increasing?

    Institutional interest in REGN 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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