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 Form 13F filings. 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
Q4 2017Dodge & Cox Stock FundSell-909,9008,231,595$1,045,824
Q4 2017Renaissance Technologies LLCSell-43,0008,100$1,029
Q4 2017ARK InvestSell-6,9762,098$267
Q3 2017Dodge & Cox Stock FundSell-44,3259,141,495$1,074,034
Q3 2017ARK InvestBuy3,7989,074$1,066
Q2 2017Dodge & Cox Stock FundSell-213,4259,185,820$732,661
Q2 2017ARK InvestSell-9485,276$421
Q1 2017Dodge & Cox Stock FundBuy194,2959,399,245$481,711
Q1 2017ARK InvestSell-117,5066,224$319
Q1 2017Renaissance Technologies LLCBuy32,42751,100$2,619
Q4 2016Dodge & Cox Stock FundBuy3,928,8829,204,950$344,633
Q4 2016ARK InvestBuy123,730123,730$4,632
Q3 2016Dodge & Cox Stock FundBuy2,759,3995,276,068$357,612
Q2 2016Dodge & Cox Stock FundBuy2,516,6692,516,669$139,650
Q2 2016Renaissance Technologies LLCSell-195,32718,673$1,036
Q1 2016Renaissance Technologies LLCBuy111,601214,000$13,433
Q4 2015Mairs & Power Growth FundBuy1002,300$217
Q2 2015Renaissance Technologies LLCSell-56,301102,399$12,275
Q4 2014Mairs & Power Growth FundBuy2,2002,200$213
Q1 2014Renaissance Technologies LLCBuy158,700158,700$10,655

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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