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
Q1 2026Dodge & Cox Stock FundSell-35,1621,929,253$638,331,940
Q1 2026Parnassus Endeavor FundBuy4,43148,991$16,209,652
Q1 2026Sequoia Financial AdvisorsBuy3484,560$1,508,649
Q4 2025Dodge & Cox Stock FundSell-356,8151,964,415$781,149,625
Q4 2025Parnassus Endeavor FundBuy7,54644,560$17,719,284
Q4 2025Sequoia Financial AdvisorsSell-944,212$1,674,715
Q3 2025Dodge & Cox Stock FundSell-875,8662,321,230$1,058,480,880
Q3 2025Polen Capital ManagementBuy693693$316,008
Q3 2025Parnassus Endeavor FundSell-39837,014$16,878,384
Q3 2025Sequoia Financial AdvisorsBuy3894,306$1,963,393
Q2 2025Dodge & Cox Stock FundSell-154,6663,197,096$1,042,541,035
Q2 2025Parnassus Endeavor FundSell-1,33637,412$12,199,679
Q2 2025Sequoia Financial AdvisorsBuy5223,917$1,277,403
Q1 2025Dodge & Cox Stock FundSell-188,5003,351,762$905,042,775
Q1 2025Sequoia Financial AdvisorsBuy993,395$916,797
Q4 2024Dodge & Cox Stock FundSell-82,2733,540,262$833,059,051
Q4 2024Sequoia Financial AdvisorsBuy1673,296$775,683
Q3 2024Dodge & Cox Stock FundSell-157,6503,622,535$996,305,801
Q3 2024Sequoia Financial AdvisorsSell-1793,129$860,569
Q2 2024Dodge & Cox Stock FundSell-31,2953,780,185$918,584,955
Q2 2024Sequoia Financial AdvisorsBuy3983,308$803,844
Q1 2024Dodge & Cox Stock FundBuy137,1703,811,480$569,625,686
Q1 2024Sequoia Financial AdvisorsSell-4,8042,910$434,900
Q4 2023Dodge & Cox Stock FundSell-72,8453,674,310$703,299,677
Q4 2023Sequoia Financial AdvisorsBuy4,9117,714$1,476,537
Q3 2023Dodge & Cox Stock FundSell-42,3703,747,155$663,621,151
Q3 2023Parnassus Endeavor FundBuy12,77838,748$6,862,271
Q3 2023Sequoia Financial AdvisorsSell-1482,803$496,412
Q2 2023Dodge & Cox Stock FundSell-105,0103,789,525$719,782,379
Q2 2023Sequoia Financial AdvisorsBuy2,0172,951$560,514

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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