BIOGEN INC (BIIB) Institutional Ownership Changes & 13F Activity

BIOGEN INC (BIIB). 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 Causeway Capital Management, Renaissance Technologies LLC, Hillman Value Fund, Sequoia Financial Advisors, and Parnassus Endeavor Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2024Hillman Value FundBuy16235,954$8,334,856
Q1 2024Renaissance Technologies LLCBuy126,098884,704$190,769
Q1 2024Hillman Value FundBuy1,31635,792$7,717,829
Q1 2024Sequoia Financial AdvisorsSell-3272,341$504,790
Q4 2023Renaissance Technologies LLCSell-327,791758,606$196,304
Q4 2023Sequoia Financial AdvisorsBuy6252,668$690,399
Q4 2023Hillman Value FundBuy17034,476$8,921,355
Q3 2023Parnassus Endeavor FundBuy54,934360,742$92,714,301
Q3 2023Renaissance Technologies LLCSell-23,1401,086,397$279,215
Q3 2023Hillman Value FundBuy4,89534,306$8,816,985
Q3 2023Mairs & Power Growth FundSell-75950$244,160
Q3 2023Sequoia Financial AdvisorsBuy452,043$525,072
Q2 2023Renaissance Technologies LLCSell-154,3001,109,537$316,052
Q2 2023Hancock Classic ValueSell-7661,618$460,887
Q2 2023Sequoia Financial AdvisorsBuy2341,998$569,131
Q2 2023Hillman Value FundSell-12529,411$8,377,723
Q1 2023Renaissance Technologies LLCBuy263,5611,263,837$351,385
Q1 2023Hillman Value FundSell-54029,536$8,211,894
Q1 2023Sequoia Financial AdvisorsBuy151,764$490,445
Q4 2022Renaissance Technologies LLCSell-154,2311,000,276$276,996
Q4 2022Parnassus Endeavor FundSell-41,943305,808$84,684,351
Q4 2022Sequoia Financial AdvisorsSell-12,1471,749$484,333
Q4 2022Hillman Value FundSell-1,67830,076$8,328,646
Q3 2022Renaissance Technologies LLCSell-391,5001,154,507$308,253
Q3 2022Parnassus Endeavor FundSell-104,302347,751$92,850
Q3 2022Hillman Value FundSell-11,26531,754$8,479
Q2 2022Renaissance Technologies LLCBuy501,8001,546,007$315,293
Q2 2022Hillman Value FundBuy34043,019$8,774
Q1 2022Renaissance Technologies LLCSell-29,6001,044,207$219,910
Q1 2022Longleaf PartnersSell-15,561842,962$177,528

Frequently asked questions about BIIB activity

  • Which institutional owners are buying BIIB?

    Institutional owners buying BIIB 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 BIIB activity?

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

  • Is institutional interest in BIIB increasing?

    Institutional interest in BIIB 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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