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
Q2 2023ARK InvestSell-1,33832,253$23,175,199
Q2 2023Sequoia Financial AdvisorsSell-261,200$862,248
Q1 2023Dodge & Cox Stock FundBuy161,6422,384,701$1,959,437,271
Q1 2023Renaissance Technologies LLCSell-76,541114,900$94,410
Q1 2023ARK InvestSell-46233,591$27,600,717
Q1 2023Sequoia Financial AdvisorsBuy1741,226$1,007,368
Q4 2022Dodge & Cox Stock FundSell-63,4502,223,059$1,603,914,838
Q4 2022Renaissance Technologies LLCSell-16,959191,441$138,123
Q4 2022ARK InvestSell-2,88834,053$24,568,899
Q4 2022Sequoia Financial AdvisorsBuy6681,052$758,906
Q3 2022Renaissance Technologies LLCSell-374,662208,400$143,561
Q3 2022Dodge & Cox Stock FundBuy21,1752,286,509$1,575,107
Q3 2022ARK InvestSell-18,87036,941$25,448
Q3 2022Hancock Classic ValueSell-325794$547
Q3 2022Sequoia Financial AdvisorsSell-94384$265
Q2 2022Renaissance Technologies LLCBuy303,200583,062$344,665
Q2 2022Dodge & Cox Stock FundBuy28,2712,265,334$1,339,107
Q2 2022ARK InvestSell-1,96255,811$37,100
Q2 2022Hancock Classic ValueBuy1951,119$661
Q2 2022Sequoia Financial AdvisorsSell-17478$283
Q1 2022Dodge & Cox Stock FundBuy1,957,9412,237,063$1,562,410
Q1 2022ARK InvestSell-15,22057,773$40,350
Q1 2022Renaissance Technologies LLCSell-3,100279,862$195,461
Q1 2022Polen Capital ManagementSell-5551,383$966
Q1 2022Sequoia Financial AdvisorsBuy93495$346
Q1 2022Hancock Classic ValueBuy20924$645
Q4 2021ARK InvestSell-355,15472,993$46,097
Q4 2021Dodge & Cox Stock FundBuy279,122279,122$176,271
Q4 2021Renaissance Technologies LLCBuy181,700282,962$178,696
Q4 2021Polen Capital ManagementSell-2171,938$1,224

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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