ALNYLAM PHARMACEUTICALS INC (ALNY) Institutional Ownership Changes & 13F Activity

ALNYLAM PHARMACEUTICALS INC (ALNY) 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, Parnassus Endeavor Fund, Sequoia Financial Advisors, Polen Capital Management, and First Eagle U.S. Value.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2023Dodge & Cox Stock FundSell-696,2473,894,535$780,153,251
Q4 2022Dodge & Cox Stock FundSell-298,5154,590,782$1,090,999,342
Q4 2022Sequoia Financial AdvisorsBuy934934$221,933
Q3 2022Dodge & Cox Stock FundSell-369,6594,889,297$978,642
Q3 2022Parnassus Endeavor FundSell-32,06825,970$5,198
Q2 2022Dodge & Cox Stock FundSell-216,7125,258,956$767,019
Q2 2022Parnassus Endeavor FundSell-19,54958,038$8,465
Q1 2022Dodge & Cox Stock FundBuy44,6005,475,668$894,122
Q4 2021Dodge & Cox Stock FundBuy58,9685,431,068$921,001
Q3 2021Dodge & Cox Stock FundSell-41,9015,372,100$1,014,306
Q2 2021Dodge & Cox Stock FundBuy1,092,3745,414,001$917,781
Q1 2021Dodge & Cox Stock FundSell-318,2864,321,627$610,171
Q4 2020Parnassus Endeavor FundBuy77,58777,587$10,084
Q4 2020Dodge & Cox Stock FundSell-37,7004,639,913$603,049
Q3 2020Dodge & Cox Stock FundSell-26,0584,677,613$681,060
Q2 2020Dodge & Cox Stock FundSell-389,6754,703,671$696,661
Q1 2020Dodge & Cox Stock FundSell-157,9755,093,346$554,411
Q1 2020First Eagle U.S. ValueBuy26,50026,500$2,885
Q4 2019Dodge & Cox Stock FundSell-60,4805,251,321$604,795
Q3 2019Dodge & Cox Stock FundBuy70,3005,311,801$427,175
Q2 2019Dodge & Cox Stock FundBuy243,5005,241,501$380,323
Q1 2019Dodge & Cox Stock FundBuy307,7504,998,001$467,063
Q4 2018Dodge & Cox Stock FundBuy34,6004,690,251$341,966
Q3 2018Renaissance Technologies LLCSell-171,00064,400$5,636
Q3 2018Dodge & Cox Stock FundBuy9504,655,651$407,463
Q2 2018Dodge & Cox Stock FundSell-38,1404,654,701$458,442
Q2 2018ARK InvestBuy8,25019,362$1,907
Q1 2018Dodge & Cox Stock FundSell-3,538,7544,692,841$558,917
Q1 2018Renaissance Technologies LLCBuy227,300235,400$28,036
Q1 2018ARK InvestBuy9,01411,112$1,323

Frequently asked questions about ALNY activity

  • Which institutional owners are buying ALNY?

    Institutional owners buying ALNY 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 ALNY activity?

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

  • Is institutional interest in ALNY increasing?

    Institutional interest in ALNY 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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