Biogen Inc.
BIIB- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0000875045
In the last 90 days, Biogen Inc. insiders filed 0 open-market purchases and 1 sale; 1,047 institutions reported holding it in 13F filings for Q2 2026, worth $30.7B in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Biogen Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 867
- −3 vs. Q1 2025
- Shares held
- 130.1M
- +498.1K (+0.4%) vs. Q1 2025
- Total value
- $16.3B
- −$1.38B (−7.8%) vs. Q1 2025
- New holders
- 96
- 342 more added
- Sold out
- 99
- 263 more reduced
12 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting BIIB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,047 | $30.7B |
| Q1 2026 | 1,015 | $24.7B |
| Q4 2025 | 1,002 | $24.6B |
| Q3 2025 | 909 | $18.4B |
| Q2 2025 | 867 | $16.3B |
| Q1 2025 | 882 | $17.7B |
| Q4 2024 | 879 | $20.2B |
| Q3 2024 | 921 | $25.1B |
| Q2 2024 | 947 | $29.9B |
| Q1 2024 | 955 | $28.0B |
| Q4 2023 | 1,005 | $33.3B |
| Q3 2023 | 966 | $32.2B |
| Q2 2023 | 1,009 | $36.1B |
| Q1 2023 | 1,004 | $35.0B |
| Q4 2022 | 1,033 | $34.6B |
| Q3 2022 | 987 | $33.0B |
| Q2 2022 | 930 | $25.0B |
| Q1 2022 | 954 | $25.9B |
| Q4 2021 | 1,014 | $29.7B |
| Q3 2021 | 1,044 | $35.1B |
| Q2 2021 | 1,107 | $43.6B |
| Q1 2021 | 1,096 | $35.7B |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Adage Capital Partners GP, L.L.C. | 247,937 | $31.1M | 0.05% | +177,170+250.4% | Added |
| LSV Asset Management | 251,959 | $31.6M | 0.07% | +9,983+4.1% | Added |
| Canada Pension Plan Investment Board | 255,183 | $32.0M | 0.03% | +24,379+10.6% | Added |
| Hudson Bay Capital Management LP | 267,740 | $33.6M | 0.22% | +67,220+33.5% | Added |
| National Pension Service | 273,055 | $34.3M | 0.03% | +1,572+0.6% | Added |
| Fisher Asset Management, LLC | 289,137 | $36.3M | 0.01% | −9,893−3.3% | Reduced |
| State of Michigan Retirement System | 291,303 | $36.6M | 0.19% | +251,600+633.7% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 294,269 | $37.0M | 0.03% | +20,721+7.6% | Added |
| Rhumbline Advisers | 300,147 | $37.7M | 0.03% | +3,853+1.3% | Added |
| Patient Capital Management, LLC | 320,466 | $40.2M | 1.82% | −135,139−29.7% | Reduced |
| Thompson Siegel & Walmsley LLC | 323,018 | $40.6M | 0.68% | +65,562+25.5% | Added |
| California Public Employees Retirement System | 339,050 | $42.6M | 0.03% | −46,044−12.0% | Reduced |
| Nuveen, LLC | 341,659 | $42.9M | 0.01% | +195,228+133.3% | Added |
| Prudential Financial Inc | 387,829 | $48.7M | 0.06% | −32,820−7.8% | Reduced |
| BNP Paribas Arbitrage, SA | 394,999 | $49.6M | 0.04% | +28,818+7.9% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 414,830 | $52.1M | 0.03% | −2,130−0.5% | Reduced |
| HSBC Holdings PLC | 443,269 | $55.6M | 0.04% | −40,760−8.4% | Reduced |
| Swiss National Bank | 443,100 | $55.6M | 0.03% | +32,100+7.8% | Added |
| UBS Group AG | 445,684 | $56.0M | 0.01% | −200,463−31.0% | Reduced |
| Robeco Institutional Asset Management B.V. | 448,757 | $56.4M | 0.09% | −4,772−1.1% | Reduced |
| Two Sigma Advisers, LP | 455,500 | $57.2M | 0.12% | −221,900−32.8% | Reduced |
| Causeway Capital Management LLC | 493,355 | $62.0M | 0.98% | +59,838+13.8% | Added |
| Royal Bank of Canada | 496,152 | $62.3M | 0.01% | +165,590+50.1% | Added |
| Two Sigma Investments, LP | 507,539 | $63.7M | 0.11% | −371,791−42.3% | Reduced |
| Alyeska Investment Group, L.P. | 508,773 | $63.9M | 0.23% | +508,773 | New |
| Allianz Asset Management GmbH | 527,060 | $66.2M | 0.09% | −140,707−21.1% | Reduced |
| Susquehanna International Group, LLP | 594,099 | $74.6M | 0.11% | +325,727+121.4% | Added |
| Citadel Advisors LLC | 608,590 | $76.4M | 0.07% | +66,826+12.3% | Added |
| Amundi | 579,797 | $77.2M | 0.03% | −736,150−55.9% | Reduced |
| Arrowstreet Capital, Limited Partnership | 624,371 | $78.4M | 0.06% | +409,591+190.7% | Added |
| Goldman Sachs Group Inc | 670,852 | $84.3M | 0.01% | +66,155+10.9% | Added |
| Millennium Management LLC | 675,502 | $84.8M | 0.08% | +251,505+59.3% | Added |
| Employees Provident Fund Board | 704,196 | $88.4M | 0.76% | 00.0% | Unchanged |
| Massachusetts Financial Services Co | 717,631 | $90.1M | 0.03% | +9,216+1.3% | Added |
| AustralianSuper Pty Ltd | 739,416 | $92.9M | 0.47% | +341,719+85.9% | Added |
| Qube Research & Technologies Ltd | 743,309 | $93.4M | 0.13% | −483,400−39.4% | Reduced |
| Man Group plc | 793,282 | $99.6M | 0.22% | +27,961+3.7% | Added |
| Barclays PLC | 797,655 | $100.2M | 0.04% | −120,698−13.1% | Reduced |
| Balyasny Asset Management LLC | 831,905 | $104.5M | 0.24% | +45,686+5.8% | Added |
| Price T Rowe Associates Inc | 833,927 | $104.7M | 0.01% | −317,265−27.6% | Reduced |
| First Trust Advisors LP | 873,823 | $109.7M | 0.09% | +212,403+32.1% | Added |
| Bank of New York Mellon Corp | 904,054 | $113.5M | 0.02% | −49,757−5.2% | Reduced |
| Dimensional Fund Advisors LP | 928,496 | $116.6M | 0.03% | −58,223−5.9% | Reduced |
| JPMorgan Chase & Co | 1,002,502 | $125.9M | 0.01% | −461,218−31.5% | Reduced |
| Renaissance Technologies LLC | 1,045,106 | $131.3M | 0.17% | +240,600+29.9% | Added |
| Bank of America Corp | 1,063,391 | $133.6M | 0.01% | +333,535+45.7% | Added |
| Van Eck Associates Corp | 1,074,811 | $135.0M | 0.15% | +1,189+0.1% | Added |
| Charles Schwab Investment Management Inc | 1,075,757 | $135.1M | 0.02% | +56,538+5.5% | Added |
| Deutsche Bank AG | 1,123,178 | $141.1M | 0.05% | +182,126+19.4% | Added |
| Pacer Advisors, Inc. | 1,319,991 | $165.8M | 0.42% | −32,569−2.4% | Reduced |
| AQR Capital Management LLC | 1,364,805 | $171.4M | 0.14% | −4,037−0.3% | Reduced |
| D. E. Shaw & Co., Inc. | 1,366,207 | $171.6M | 0.17% | −219,365−13.8% | Reduced |
| T. Rowe Price Investment Management, Inc. | 1,394,476 | $175.1M | 0.11% | −1,265,814−47.6% | Reduced |
| Legal & General Group Plc | 1,446,816 | $181.7M | 0.05% | +161,789+12.6% | Added |
| Northern Trust Corp | 1,536,980 | $193.0M | 0.03% | +35,893+2.4% | Added |
| FMR LLC | 1,674,220 | $210.3M | 0.01% | +365,392+27.9% | Added |
| UBS Asset Management Americas Inc | 1,743,209 | $218.9M | 0.04% | +232,823+15.4% | Added |
| Morgan Stanley | 1,956,210 | $245.7M | 0.02% | −34,458−1.7% | Reduced |
| Norges Bank | 2,264,177 | $284.4M | 0.04% | +110,791+5.1% | Added |
| Invesco Ltd. | 2,320,126 | $291.4M | 0.05% | +55,119+2.4% | Added |
| Point72 Asset Management, L.P. | 3,831,727 | $481.2M | 1.14% | +3,424,470+840.9% | Added |
| Geode Capital Management, LLC | 3,918,150 | $490.1M | 0.03% | +71,286+1.9% | Added |
| Wellington Management Group LLP | 4,798,420 | $602.6M | 0.11% | +125,983+2.7% | Added |
| State Street Corp | 7,468,807 | $938.0M | 0.04% | +71,897+1.0% | Added |
| BlackRock, Inc. | 13,555,466 | $1.70B | 0.03% | −1,655,570−10.9% | Reduced |
| Primecap Management Co | 15,802,122 | $1.98B | 1.57% | −141,137−0.9% | Reduced |
| Vanguard Group Inc | 17,290,651 | $2.17B | 0.04% | +257,812+1.5% | Added |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −134,489−100.0% | Sold out |
| Cutter Capital Management, LP | 0 | $0 | 0.00% | −113,500−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −64,253−100.0% | Sold out |
| Worldquant Millennium Advisors LLC | 0 | $0 | 0.00% | −57,013−100.0% | Sold out |
| Banco Santander, S.A. | 0 | $0 | 0.00% | −54,991−100.0% | Sold out |
| Tredje AP-fonden | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Factory Mutual Insurance Co | 0 | $0 | 0.00% | −49,200−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −44,254−100.0% | Sold out |
| Altrinsic Global Advisors LLC | 0 | $0 | 0.00% | −37,698−100.0% | Sold out |
| Kirr Marbach & Co LLC | 0 | $0 | 0.00% | −33,444−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −24,991−100.0% | Sold out |
| Delta Global Management LP | 0 | $0 | 0.00% | −17,872−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −16,743−100.0% | Sold out |
| Level Four Advisory Services, LLC | 0 | $0 | 0.00% | −16,154−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −15,802−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −14,365−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −12,159−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −11,191−100.0% | Sold out |
| SIH Partners, LLLP | 0 | $0 | 0.00% | −10,414−100.0% | Sold out |
| AG2R la Mondiale Gestion D'Actifs | 0 | $0 | 0.00% | −7,641−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −5,599−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −5,275−100.0% | Sold out |
| Camelot Portfolios, LLC | 0 | $0 | 0.00% | −4,950−100.0% | Sold out |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 0 | $0 | 0.00% | −4,763−100.0% | Sold out |
| Agf Management Ltd | 0 | $0 | 0.00% | −4,686−100.0% | Sold out |
| Allstate Corp | 0 | $0 | 0.00% | −4,589−100.0% | Sold out |
| Hillsdale Investment Management Inc. | 0 | $0 | 0.00% | −4,210−100.0% | Sold out |
| Machina Capital S.A.S. | 0 | $0 | 0.00% | −4,146−100.0% | Sold out |
| Wealthedge Investment Advisors, LLC | 0 | $0 | 0.00% | −3,873−100.0% | Sold out |
| United Services Automobile Association | 0 | $0 | 0.00% | −3,604−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −3,081−100.0% | Sold out |
| Ramiah Investment Group | 0 | $0 | 0.00% | −3,073−100.0% | Sold out |
| TownSquare Capital, LLC | 0 | $0 | 0.00% | −2,985−100.0% | Sold out |