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
Q1 2025Dodge & Cox Stock FundBuy2,7692,324,085$1,474,004,430
Q1 2025ARK InvestBuy50213,694$8,685,055
Q1 2025Sequoia Financial AdvisorsSell-1341,615$1,024,475
Q4 2024Renaissance Technologies LLCBuy36,320247,743$176,474,771
Q4 2024Dodge & Cox Stock FundBuy9,3812,321,316$1,653,543,026
Q4 2024ARK InvestSell-1,95913,192$9,397,287
Q4 2024Sequoia Financial AdvisorsBuy91,749$1,245,990
Q3 2024Viking Global InvestorsSell-1,030,81249,870$52,425,339
Q3 2024Renaissance Technologies LLCBuy26,261211,423$222,256,315
Q3 2024Dodge & Cox Stock FundSell-3,7512,311,935$2,430,398,549
Q3 2024ARK InvestSell-71415,151$15,927,779
Q3 2024Sequoia Financial AdvisorsBuy2181,740$1,829,107
Q2 2024Dodge & Cox Stock FundSell-44,1782,315,686$2,433,855,457
Q2 2024Renaissance Technologies LLCBuy19,800185,162$194,610,817
Q2 2024ARK InvestSell-2,34815,865$16,674,439
Q2 2024Sequoia Financial AdvisorsBuy731,522$1,599,774
Q1 2024Renaissance Technologies LLCSell-77,700165,362$159,159
Q1 2024ARK InvestSell-9,51818,213$17,529,940
Q1 2024Dodge & Cox Stock FundSell-7,8162,359,864$2,271,345,501
Q1 2024Sequoia Financial AdvisorsSell-6501,449$1,394,617
Q4 2023Renaissance Technologies LLCBuy81,000243,062$213,479
Q4 2023Dodge & Cox Stock FundSell-5,3182,367,680$2,079,509,667
Q4 2023Sequoia Financial AdvisorsBuy9002,099$1,843,811
Q4 2023ARK InvestSell-927,731$24,355,445
Q3 2023Renaissance Technologies LLCBuy73,862162,062$133,371
Q3 2023Dodge & Cox Stock FundSell-21,3572,372,998$1,952,882,434
Q3 2023ARK InvestSell-4,51327,740$22,829,049
Q3 2023Sequoia Financial AdvisorsSell-11,199$986,943
Q2 2023Renaissance Technologies LLCSell-26,70088,200$63,375
Q2 2023Dodge & Cox Stock FundBuy9,6542,394,355$1,720,439,842

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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