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Biogen (BIIB) Institutional Ownership

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$146.57 -3.04 (-2.03%)
Closing price 10/10/2025 04:00 PM Eastern
Extended Trading
$143.87 -2.70 (-1.84%)
As of 10/10/2025 07:59 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Biogen (NASDAQ:BIIB)

Current
Institutional Ownership
Percentage
87.93%
Number of
Institutional Buyers
(last 12 months)
599
Total
Institutional Inflows
(last 12 months)
$4.39B
Number of
Institutional Sellers
(last 12 months)
402
Total
Institutional Outflows
(last 12 months)
$2.66B
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BIIB Institutional Buying and Selling by Quarter

Biogen Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/10/2025Fluent Financial LLC25,543$3.58M1.4%N/A0.017%
10/10/2025Lineweaver Wealth Advisors LLC2,209$309K0.0%N/A0.002%
10/10/2025Wedge Capital Management L L P NC192,872$27.02M0.5%N/A0.132%
10/10/2025Flputnam Investment Management Co.2,121$297K0.0%+12.2%0.001%
10/9/2025 Board of the Pension Protection Fund1,400$196K0.2%N/A0.001%
10/9/2025 Voya Investment Management LLC63,289$8.87M0.0%-9.9%0.043%
10/8/2025 Wedmont Private Capital2,680$408K0.0%+22.4%0.002%
10/8/2025 Czech National Bank37,238$5.22M0.0%+4.0%0.025%
10/7/2025 Assenagon Asset Management S.A.6,913$968K0.0%-36.8%0.005%
10/2/2025 GAMMA Investing LLC4,343$608K0.0%+21.1%0.003%
10/1/2025 Farmers Trust Co.25,971$3.64M0.6%-12.0%0.018%
10/1/2025 Praxis Investment Management Inc.3,450$483K0.0%-39.4%0.002%
9/26/2025Corient Private Wealth LLC34,331$4.31M0.0%+15.2%0.023%
9/24/2025Texas Permanent School Fund Corp10,121$1.27M0.0%-35.1%0.007%
9/22/2025Caldwell Trust Co401$50K0.0%N/A0.000%
9/12/2025Valeo Financial Advisors LLC1,794$225K0.0%N/A0.001%
9/4/2025Osaic Holdings Inc.8,735$1.10M0.0%+12.1%0.006%
8/28/2025Lavaca Capital LLC447$56K0.0%+56.8%0.000%
8/28/2025China Universal Asset Management Co. Ltd.32,757$4.11M0.4%-0.9%0.022%
8/27/2025Orion Porfolio Solutions LLC8,587$1.08M0.0%+15.0%0.006%
8/26/2025Thrivent Financial for Lutherans18,195$2.29M0.0%+24.2%0.012%
8/25/2025Neuberger Berman Group LLC11,116$1.40M0.0%+61.3%0.008%
8/22/2025Cim Investment Management Inc.5,764$803K0.2%+99.7%0.004%
8/20/2025Kentucky Retirement Systems9,333$1.17M0.0%-6.2%0.006%
8/20/2025Kentucky Retirement Systems Insurance Trust Fund3,961$497K0.0%-6.5%0.003%
8/19/2025B. Riley Wealth Advisors Inc.1,991$250K0.0%N/A0.001%
8/19/2025State of Wyoming3,379$424K0.1%+31.9%0.002%
8/19/2025Pitcairn Co.7,454$936K0.1%N/A0.005%
8/18/2025Hudson Bay Capital Management LP267,740$33.63M0.1%+33.5%0.183%
8/18/2025CYBER HORNET ETFs LLC373$47K0.0%N/A0.000%
8/16/2025Public Sector Pension Investment Board11,252$1.41M0.0%-44.0%0.008%
8/16/2025Evergreen Capital Management LLC1,932$243K0.0%-36.5%0.001%
8/16/2025Headlands Technologies LLC22,791$2.86M0.3%-8.0%0.016%
8/15/2025CANADA LIFE ASSURANCE Co130,933$16.46M0.0%+4.3%0.089%
8/15/2025Tower Research Capital LLC TRC 2,914$366K0.0%-64.6%0.002%
8/15/2025MUFG Securities EMEA plc431$54K0.0%N/A0.000%
8/15/2025Corient Private Wealth LLC34,653$4.35M0.0%+16.3%0.024%
8/15/2025Auxier Asset Management10,232$1.29M0.2%-24.5%0.007%
8/15/2025State of Tennessee Department of Treasury36,544$4.59M0.0%-17.9%0.025%
8/15/2025E Fund Management Co. Ltd.13,810$1.73M0.1%+3.2%0.009%
8/15/2025Captrust Financial Advisors14,595$1.83M0.0%+16.0%0.010%
8/15/2025WFA of San Diego LLC253$32K0.0%N/A0.000%
8/15/2025Vident Advisory LLC5,064$636K0.0%-25.9%0.003%
8/15/2025Tidal Investments LLC21,984$2.76M0.0%+10.7%0.015%
8/15/2025Smartleaf Asset Management LLC202$25K0.0%-38.2%0.000%
8/15/2025Royal London Asset Management Ltd.67,746$8.51M0.0%-3.6%0.046%
8/15/2025Rafferty Asset Management LLC180,440$22.66M0.1%-0.2%0.123%
8/15/2025Orion Investment Co32,901$4.13M1.5%+3.9%0.022%
8/15/2025Orion Porfolio Solutions LLC517,275$64.97M0.5%+6,828.4%0.353%
8/15/2025MML Investors Services LLC8,560$1.08M0.0%+7.8%0.006%
8/15/2025Man Group plc793,282$99.63M0.2%+3.7%0.541%
8/15/2025Lazard Asset Management LLC58,131$7.30M0.0%-0.8%0.040%
8/15/2025HRT Financial LP38,276$4.81M0.0%-78.5%0.026%
8/15/2025Hillman Capital Management Inc.41,972$5.27M2.9%-4.7%0.029%
8/15/2025Hudson Bay Capital Management LP267,740$33.63M0.1%+33.5%0.183%
8/15/2025Humankind Investments LLC3,039$382K0.1%-13.1%0.002%
8/15/2025Great Valley Advisor Group Inc.2,076$261K0.0%-36.9%0.001%
8/15/2025EP Wealth Advisors LLC4,614$579K0.0%+5.2%0.003%
8/15/2025Engineers Gate Manager LP33,008$4.15M0.1%-57.1%0.023%
8/15/2025BI Asset Management Fondsmaeglerselskab A S6,626$832K0.0%+25.4%0.005%
8/15/2025Boothbay Fund Management LLC10,922$1.37M0.0%+503.4%0.007%
8/15/2025BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp23,034$2.89M0.0%-17.4%0.016%
8/15/2025Brevan Howard Capital Management LP13,456$1.69M0.0%+59.9%0.009%
8/15/2025Balyasny Asset Management L.P.831,905$104.48M0.2%+5.8%0.567%
8/15/2025Adage Capital Partners GP L.L.C.247,937$31.14M0.1%+250.4%0.169%
8/15/2025Ameriprise Financial Inc.126,056$15.83M0.0%+22.9%0.086%
8/15/2025AQR Capital Management LLC1,364,805$171.41M0.1%-0.3%0.931%
8/14/2025PDT Partners LLC31,664$3.98M0.2%N/A0.022%
8/14/2025California State Teachers Retirement System238,691$29.98M0.0%+3.5%0.163%
8/14/2025Raymond James Financial Inc.51,997$6.53M0.0%+23.9%0.035%
8/14/2025Canada Pension Plan Investment Board255,183$32.05M0.0%+10.6%0.174%
8/14/2025Quantinno Capital Management LP54,166$6.80M0.0%+223.8%0.037%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.139,832$17.56M0.0%-3.3%0.095%
8/14/2025DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main147,482$18.52M0.0%+11.0%0.101%
8/14/2025Alliancebernstein L.P.231,108$29.03M0.0%+0.9%0.158%
8/14/2025Caption Management LLC11,000$1.38M0.0%N/A0.008%
8/14/2025Ieq Capital LLC112,251$14.10M0.1%+61.0%0.077%
8/14/2025Treasurer of the State of North Carolina68,242$8.57M0.0%+2.4%0.047%
8/14/2025The Manufacturers Life Insurance Company 107,753$13.53M0.0%-9.6%0.073%
8/14/2025Investment House LLC1,730$217K0.0%-46.3%0.001%
8/14/2025Sei Investments Co.22,028$2.77M0.0%-31.9%0.015%
8/14/2025NewEdge Advisors LLC2,673$336K0.0%+13.4%0.002%
8/14/2025Investment Management Corp of Ontario6,078$763K0.0%-7.6%0.004%
8/14/2025iSAM Funds UK Ltd4,525$568K0.1%N/A0.003%
8/14/2025AXA S.A.108,572$13.64M0.0%-29.5%0.074%
8/14/2025Lombard Odier Asset Management Switzerland SA16,430$2.06M0.1%-22.0%0.011%
8/14/2025State Street Corp7,468,807$938.01M0.0%+1.0%5.094%
8/14/2025Daiwa Securities Group Inc.39,128$4.91M0.0%-9.8%0.027%
8/14/2025CoreFirst Bank & Trust894$112K0.1%N/A0.001%
8/14/2025Natixis34,781$4.37M0.0%+16.3%0.024%
8/14/2025Ossiam50,487$6.34M0.1%-3.2%0.034%
8/14/2025California Public Employees Retirement System339,050$42.58M0.0%-12.0%0.231%
8/14/2025Cerity Partners LLC46,552$5.85M0.0%+15.3%0.032%
8/14/2025Federated Hermes Inc.120,277$15.11M0.0%+16.5%0.082%
8/13/2025Jump Financial LLC8,169$1.03M0.0%-88.8%0.006%
8/13/2025Avestar Capital LLC2,797$351K0.0%+28.6%0.002%
8/13/2025Cresset Asset Management LLC87,650$11.01M0.0%-332.2%0.060%
8/13/2025Amundi579,797$77.22M0.0%-55.9%0.395%
8/13/2025Marshall Wace LLP165,955$20.84M0.0%+2,712.8%0.113%
8/13/2025Baird Financial Group Inc.4,673$587K0.0%-51.7%0.003%
(Data available from 1/1/2016 forward)

BIIB Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of BIIB shares?

During the previous two years, 995 institutional investors and hedge funds held shares of Biogen. The most heavily invested institutionals were Vanguard Group Inc. ($2.17B), Primecap Management Co. CA ($1.98B), State Street Corp ($938.01M), International Assets Investment Management LLC ($695.87M), Wellington Management Group LLP ($639.38M), Geode Capital Management LLC ($490.09M), and Morgan Stanley ($383.75M).Learn more on Biogen's institutional investors.

What percentage of Biogen's stock is owned by institutional investors?

87.93% of Biogen's stock is owned by institutional investors. Learn more on BIIB's institutional investor holdings.

Which institutional investors have been buying Biogen's stock?

Of the 849 institutional investors that purchased Biogen's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Norges Bank ($6.05M), Vanguard Group Inc. ($4.99M), Pacer Advisors Inc. ($2.66M), Van ECK Associates Corp ($1.75M), AQR Capital Management LLC ($1.34M), First Trust Advisors LP ($936.99K), and Invesco Ltd. ($879.76K).

How much institutional buying is happening at Biogen?

Institutional investors have bought a total of 29,696,145 shares in the last 24 months. This purchase volume represents approximately $4.39B in transactions.

Which of Biogen's major shareholders have been selling company stock?

Of the 401 institutional investors that sold Biogen's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: T. Rowe Price Investment Management Inc. ($1.60M), Pacer Advisors Inc. ($1.31M), Ameriprise Financial Inc. ($1.01M), Van ECK Associates Corp ($823.82K), Price T Rowe Associates Inc. MD ($782.52K), Amundi ($736.15K), and SG Americas Securities LLC ($684.72K).

How much institutional selling is happening at Biogen?

Institutional investors have sold a total of 18,098,457 shares in the last 24 months. This volume of shares sold represents approximately $2.66B in transactions.


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This page (NASDAQ:BIIB) was last updated on 10/11/2025 by MarketBeat.com Staff
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