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Biogen (BIIB) Institutional Ownership

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$221.56 +9.01 (+4.24%)
Closing price 08/19/2026 04:00 PM Eastern
Extended Trading
$219.81 -1.75 (-0.79%)
As of 08/19/2026 07:45 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 Massive. 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)
591
Total
Institutional Inflows
(last 12 months)
$11.18B
Number of
Institutional Sellers
(last 12 months)
321
Total
Institutional Outflows
(last 12 months)
$2.24B
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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
8/20/2026 Northwestern Mutual Wealth Management Co.7,299$1.58M0.0%+3.6%0.005%
8/20/2026 Wedbush Securities Inc.1,164$251K0.0%+5.1%0.001%
8/20/2026 Greenleaf Trust6,491$1.40M0.0%+1.9%0.004%
8/19/2026 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC1,255,168$271.19M0.0%-8.9%0.850%
8/19/2026 New Mexico Educational Retirement Board7,224$1.56M0.0%+5.9%0.005%
8/19/2026 Royal London Asset Management Ltd.64,751$13.99M0.0%+0.8%0.044%
8/19/2026 Mufg Securities Americas Inc.4,447$961K0.0%+9.5%0.003%
8/19/2026 Investors Asset Management of Georgia Inc. GA ADV1,032$223K0.1%N/A0.001%
8/19/2026 Van ECK Associates Corp98,109$21.20M0.0%-90.9%0.066%
8/19/2026 Nissay Asset Management Corp Japan185,301$40.04M0.2%+522.6%0.125%
8/19/2026 Wellington Management Group LLP3,117,469$673.56M0.1%+5.3%2.110%
8/19/2026Kingsview Wealth Management LLC1,171$253K0.0%N/A0.001%
8/18/2026 Beacon Pointe Advisors LLC4,544$981K0.0%N/A0.003%
8/18/2026 Pin Oak Investment Advisors Inc.821$177K0.1%N/A0.001%
8/18/2026 Livforsakringsbolaget Skandia Omsesidigt1,330$287K0.0%N/A0.001%
8/18/2026 Rakuten Investment Management Inc.24,097$5.22M0.0%N/A0.016%
8/18/2026 Palo Alto Investors LP140,279$30.31B4.2%N/A0.095%
8/18/2026 Empowered Funds LLC21,948$4.74M0.0%N/A0.015%
8/18/2026 United Capital Financial Advisors LLC7,017$1.52M0.0%N/A0.005%
8/18/2026Jefferies Financial Group Inc.27,463$5.93M0.0%N/A0.019%
8/18/2026 Public Employees Retirement System of Ohio45,608$9.85M0.0%N/A0.031%
8/17/2026 Proficio Capital Partners LLC2,701$584K0.0%N/A0.002%
8/17/2026 Pure Financial Advisors LLC1,438$311K0.0%N/A0.001%
8/17/2026 Corient Private Wealth LP163,315$10.56M0.0%N/A0.111%
8/17/2026 Parallax Volatility Advisers L.P.2,291$495K0.0%N/A0.002%
8/17/2026 Artia Global Partners LP18,437$3.98M0.7%N/A0.012%
8/17/2026 Bank of America Corp DE1,116,228$241.17M0.0%N/A0.755%
8/15/2026 Freestone Grove Partners LP83,853$18.12M0.1%N/A0.057%
8/15/2026 Caisse de depot et placement du Quebec510,194$110.23M0.2%N/A0.345%
8/15/2026 Man Group plc196,222$42.40M0.1%N/A0.133%
8/15/2026 Roberts Glore & Co. Inc. IL3,001$648K0.2%N/A0.002%
8/15/2026 Jupiter Topco LLC19,831$4.28M0.0%N/A0.013%
8/14/2026 ADAR1 Capital Management LLC17,900$3.87M0.2%N/A0.012%
8/14/2026 EFG International AG4,582$990K0.0%N/A0.003%
8/14/2026 Primecap Management Co. CA15,154,606$3.27B1.9%N/A10.257%
8/14/2026 Canada Pension Plan Investment Board13,602$2.94M0.0%N/A0.009%
8/14/2026 Legal & General Group Plc1,493,289$322.64M0.1%N/A1.011%
8/14/2026 The Manufacturers Life Insurance Company 90,784$19.62M0.0%N/A0.061%
8/14/2026 Aberdeen Wealth Management LLC265$57K0.0%N/A0.000%
8/14/2026 Trail Ridge Investment Advisors LLC1,807$390K0.2%N/A0.001%
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8/13/2026 Cibc World Market Inc.7,424$1.60M0.0%N/A0.005%
8/13/2026 OMERS ADMINISTRATION Corp23,421$5.06M0.0%N/A0.016%
8/13/2026 Osmosis Investment Management UK Ltd3,629$784K0.0%N/A0.002%
8/13/2026 Sanctuary Advisors LLC5,838$1.26M0.0%N/A0.004%
8/13/2026 Polymer Capital Management HK LTD38,665$8.35M0.4%N/A0.026%
8/13/2026 Connor Clark & Lunn Investment Management Ltd.3,948$853K0.0%N/A0.003%
8/13/2026 Bank of Nova Scotia16,446$3.55M0.0%N/A0.011%
8/12/2026 Elevation Point Wealth Partners LLC3,519$760K0.0%N/A0.002%
8/12/2026 Daiichi Life Insurance Co. Ltd.5,397$1.17M0.0%N/A0.004%
8/12/2026 Commerce Bank11,672$2.52M0.0%N/A0.008%
8/12/2026 Northwestern Mutual Wealth Management Co.7,299$1.58M0.0%N/A0.005%
8/12/2026 Evolve Private Wealth LLC2,032$439K0.0%N/A0.001%
8/12/2026 Westpac Banking Corp1,843$398K0.0%N/A0.001%
8/12/2026 TRB Wealth Management LLC1,097$237K0.0%N/A0.001%
8/12/2026 Sumitomo Life Insurance Co.1,648$356K0.0%N/A0.001%
8/12/2026 Korea Investment CORP33,574$7.25M0.0%N/A0.023%
8/12/2026 EP Wealth Advisors LLC2,024$437K0.0%N/A0.001%
8/12/2026 Ieq Capital LLC132,142$28.55M0.1%N/A0.089%
8/12/2026 Callan Family Office LLC6,183$1.34M0.0%N/A0.004%
8/12/2026 Keebeck Wealth Management1,395$301K0.0%N/A0.001%
8/11/2026 Keating Financial Advisory Services Inc.268$58K0.0%N/A0.000%
8/11/2026 Encore Global Management LP500$108K0.1%N/A0.000%
8/11/2026 Allworth Financial LP8,033$1.74M0.0%N/A0.005%
8/11/2026 B. Metzler seel. Sohn & Co. AG12,258$2.65M0.0%N/A0.008%
8/11/2026 Advisors Capital Management LLC1,020$220K0.0%N/A0.001%
8/11/2026 Vise Technologies Inc.6,627$1.43M0.0%N/A0.004%
8/11/2026 OVERSEA CHINESE BANKING Corp Ltd13,000$2.81M0.1%N/A0.009%
8/11/2026 OVERSEA CHINESE BANKING Corp Ltd18,867$4.08M0.1%N/A0.013%
8/11/2026 E Fund Management Co. Ltd.4,174$902K0.0%N/A0.003%
8/11/2026 Edmond DE Rothschild Holding S.A.56,064$12.11M0.2%N/A0.038%
8/10/2026 Tocqueville Asset Management L.P.4,486$969K0.0%N/A0.003%
8/10/2026 Mmbg Investment Advisors CO.1,248$270K0.0%N/A0.001%
8/10/2026 Great Lakes Advisors LLC9,477$2.05M0.0%N/A0.006%
8/10/2026 Danske Bank A S66,365$14.34M0.0%N/A0.045%
8/8/2026 Wealthfront Advisers LLC16,529$3.57M0.0%N/A0.011%
8/8/2026 Aljian Capital Management LLC2,475$535K0.1%N/A0.002%
8/8/2026 Meeder Advisory Services Inc.4,608$996K0.0%N/A0.003%
8/7/2026 Citizens Financial Group Inc. RI3,282$709K0.0%N/A0.002%
8/7/2026 K.J. Harrison & Partners Inc10,000$2.16M0.3%N/A0.007%
8/7/2026 BlackRock Inc.15,985,736$3.45B0.1%N/A10.819%
8/7/2026 Pallas Capital Advisors LLC12,859$2.78M0.1%N/A0.009%
8/7/2026 Deutsche Bank AG894,035$193.17M0.1%N/A0.605%
8/7/2026 Perigon Wealth Management LLC1,761$380K0.0%N/A0.001%
8/7/2026 Trust Co. of Vermont389$84K0.0%N/A0.000%
8/7/2026 Mitsubishi UFJ Asset Management Co. Ltd.358,823$77.53M0.0%N/A0.243%
8/7/2026 OneDigital Investment Advisors LLC1,283$277K0.0%N/A0.001%
8/7/2026 Plato Investment Management Ltd6,938$1.49M0.1%N/A0.005%
8/7/2026 Bell Investment Advisors Inc127$27K0.0%N/A0.000%
8/7/2026 Simplicity Wealth LLC2,259$488K0.0%N/A0.002%
8/6/2026 Nippon Life Global Investors Americas Inc.137,220$29.65M1.2%N/A0.093%
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8/6/2026 Flputnam Investment Management Co.1,861$402K0.0%N/A0.001%
8/6/2026 Global Retirement Partners LLC1,085$234K0.0%N/A0.001%
8/6/2026 Bank of New York Mellon Corp773,619$167.15M0.0%N/A0.524%
8/6/2026 Focus Partners Advisor Solutions LLC7,689$1.66M0.0%N/A0.005%
8/6/2026 State of Wyoming2,923$632K0.1%N/A0.002%
8/6/2026 Stoneridge Investment Partners LLC3,414$693K0.5%N/A0.002%
8/6/2026 One Wealth Advisors LLC1,599$345K0.0%N/A0.001%
8/5/2026 Bridgewater Advisors Inc.1,241$248K0.0%N/A0.001%
8/3/2026 Oppenheimer Asset Management Inc.2,207$477K0.0%N/A0.001%
7/10/2026 Investors Research Corp1,641$355K0.1%-11.3%0.001%


BIIB Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,005 institutional investors and hedge funds held shares of Biogen. The most heavily invested institutionals were Palo Alto Investors LP ($30.31B), BlackRock Inc. ($3.45B), Primecap Management Co. CA ($3.27B), Vanguard Group Inc. ($3.07B), State Street Corp ($1.26B), Geode Capital Management LLC ($736.44M), and International Assets Investment Management LLC ($695.87M).Learn more on Biogen's institutional investors.

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

Of the 900 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: BlackRock Inc. ($15.99M), Primecap Management Co. CA ($15.15M), Norges Bank ($7.23M), Pacer Advisors Inc. ($2.78M), Legal & General Group Plc ($1.80M), AQR Capital Management LLC ($1.74M), and Boston Partners ($1.72M).

Institutional investors have bought a total of 55,860,275 shares in the last 24 months. This purchase volume represents approximately $11.18B in transactions.

Of the 320 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: Wellington Management Group LLP ($1.25M), Primecap Management Co. CA ($1.04M), Van ECK Associates Corp ($990.95K), Invesco Ltd. ($762.69K), Renaissance Technologies LLC ($761.01K), Pacer Advisors Inc. ($625.48K), and Man Group plc ($578.74K).

Institutional investors have sold a total of 13,243,740 shares in the last 24 months. This volume of shares sold represents approximately $2.24B in transactions.


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Institutional ownership data for NASDAQ:BIIB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/20/2026. New 13F filings are added each quarter as they're published.
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