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; 1,046 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 | 1,046 | $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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 17,290,651 | $2.17B | 0.04% | +257,812+1.5% | Added |
| Primecap Management Co | 15,802,122 | $1.98B | 1.57% | −141,137−0.9% | Reduced |
| BlackRock, Inc. | 13,555,466 | $1.70B | 0.03% | −1,655,570−10.9% | Reduced |
| State Street Corp | 7,468,807 | $938.0M | 0.04% | +71,897+1.0% | Added |
| Wellington Management Group LLP | 4,798,420 | $602.6M | 0.11% | +125,983+2.7% | Added |
| Geode Capital Management, LLC | 3,918,150 | $490.1M | 0.03% | +71,286+1.9% | Added |
| Point72 Asset Management, L.P. | 3,831,727 | $481.2M | 1.14% | +3,424,470+840.9% | Added |
| Invesco Ltd. | 2,320,126 | $291.4M | 0.05% | +55,119+2.4% | Added |
| Norges Bank | 2,264,177 | $284.4M | 0.04% | +110,791+5.1% | Added |
| Morgan Stanley | 1,956,210 | $245.7M | 0.02% | −34,458−1.7% | Reduced |
| UBS Asset Management Americas Inc | 1,743,209 | $218.9M | 0.04% | +232,823+15.4% | Added |
| FMR LLC | 1,674,220 | $210.3M | 0.01% | +365,392+27.9% | Added |
| Northern Trust Corp | 1,536,980 | $193.0M | 0.03% | +35,893+2.4% | Added |
| Legal & General Group Plc | 1,446,816 | $181.7M | 0.05% | +161,789+12.6% | Added |
| T. Rowe Price Investment Management, Inc. | 1,394,476 | $175.1M | 0.11% | −1,265,814−47.6% | Reduced |
| D. E. Shaw & Co., Inc. | 1,366,207 | $171.6M | 0.17% | −219,365−13.8% | Reduced |
| AQR Capital Management LLC | 1,364,805 | $171.4M | 0.14% | −4,037−0.3% | Reduced |
| Pacer Advisors, Inc. | 1,319,991 | $165.8M | 0.42% | −32,569−2.4% | Reduced |
| Deutsche Bank AG | 1,123,178 | $141.1M | 0.05% | +182,126+19.4% | Added |
| Charles Schwab Investment Management Inc | 1,075,757 | $135.1M | 0.02% | +56,538+5.5% | Added |
| Van Eck Associates Corp | 1,074,811 | $135.0M | 0.15% | +1,189+0.1% | Added |
| Bank of America Corp | 1,063,391 | $133.6M | 0.01% | +333,535+45.7% | Added |
| Renaissance Technologies LLC | 1,045,106 | $131.3M | 0.17% | +240,600+29.9% | Added |
| JPMorgan Chase & Co | 1,002,502 | $125.9M | 0.01% | −461,218−31.5% | Reduced |
| Dimensional Fund Advisors LP | 928,496 | $116.6M | 0.03% | −58,223−5.9% | Reduced |
| Bank of New York Mellon Corp | 904,054 | $113.5M | 0.02% | −49,757−5.2% | Reduced |
| First Trust Advisors LP | 873,823 | $109.7M | 0.09% | +212,403+32.1% | Added |
| Price T Rowe Associates Inc | 833,927 | $104.7M | 0.01% | −317,265−27.6% | Reduced |
| Balyasny Asset Management LLC | 831,905 | $104.5M | 0.24% | +45,686+5.8% | Added |
| Barclays PLC | 797,655 | $100.2M | 0.04% | −120,698−13.1% | Reduced |
| Man Group plc | 793,282 | $99.6M | 0.22% | +27,961+3.7% | Added |
| Qube Research & Technologies Ltd | 743,309 | $93.4M | 0.13% | −483,400−39.4% | Reduced |
| AustralianSuper Pty Ltd | 739,416 | $92.9M | 0.47% | +341,719+85.9% | Added |
| Massachusetts Financial Services Co | 717,631 | $90.1M | 0.03% | +9,216+1.3% | Added |
| Employees Provident Fund Board | 704,196 | $88.4M | 0.76% | 00.0% | Unchanged |
| Millennium Management LLC | 675,502 | $84.8M | 0.08% | +251,505+59.3% | Added |
| Goldman Sachs Group Inc | 670,852 | $84.3M | 0.01% | +66,155+10.9% | Added |
| Arrowstreet Capital, Limited Partnership | 624,371 | $78.4M | 0.06% | +409,591+190.7% | Added |
| Amundi | 579,797 | $77.2M | 0.03% | −736,150−55.9% | Reduced |
| Citadel Advisors LLC | 608,590 | $76.4M | 0.07% | +66,826+12.3% | Added |
| Susquehanna International Group, LLP | 594,099 | $74.6M | 0.11% | +325,727+121.4% | Added |
| Allianz Asset Management GmbH | 527,060 | $66.2M | 0.09% | −140,707−21.1% | Reduced |
| Alyeska Investment Group, L.P. | 508,773 | $63.9M | 0.23% | +508,773 | New |
| Two Sigma Investments, LP | 507,539 | $63.7M | 0.11% | −371,791−42.3% | Reduced |
| Royal Bank of Canada | 496,152 | $62.3M | 0.01% | +165,590+50.1% | Added |
| Causeway Capital Management LLC | 493,355 | $62.0M | 0.98% | +59,838+13.8% | Added |
| Two Sigma Advisers, LP | 455,500 | $57.2M | 0.12% | −221,900−32.8% | Reduced |
| Robeco Institutional Asset Management B.V. | 448,757 | $56.4M | 0.09% | −4,772−1.1% | Reduced |
| UBS Group AG | 445,684 | $56.0M | 0.01% | −200,463−31.0% | Reduced |
| Swiss National Bank | 443,100 | $55.6M | 0.03% | +32,100+7.8% | Added |
| HSBC Holdings PLC | 443,269 | $55.6M | 0.04% | −40,760−8.4% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 414,830 | $52.1M | 0.03% | −2,130−0.5% | Reduced |
| BNP Paribas Arbitrage, SA | 394,999 | $49.6M | 0.04% | +28,818+7.9% | Added |
| Prudential Financial Inc | 387,829 | $48.7M | 0.06% | −32,820−7.8% | Reduced |
| Nuveen, LLC | 341,659 | $42.9M | 0.01% | +195,228+133.3% | Added |
| California Public Employees Retirement System | 339,050 | $42.6M | 0.03% | −46,044−12.0% | Reduced |
| Thompson Siegel & Walmsley LLC | 323,018 | $40.6M | 0.68% | +65,562+25.5% | Added |
| Patient Capital Management, LLC | 320,466 | $40.2M | 1.82% | −135,139−29.7% | Reduced |
| Rhumbline Advisers | 300,147 | $37.7M | 0.03% | +3,853+1.3% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 294,269 | $37.0M | 0.03% | +20,721+7.6% | Added |
| State of Michigan Retirement System | 291,303 | $36.6M | 0.19% | +251,600+633.7% | Added |
| Fisher Asset Management, LLC | 289,137 | $36.3M | 0.01% | −9,893−3.3% | Reduced |
| National Pension Service | 273,055 | $34.3M | 0.03% | +1,572+0.6% | Added |
| Hudson Bay Capital Management LP | 267,740 | $33.6M | 0.22% | +67,220+33.5% | Added |
| Canada Pension Plan Investment Board | 255,183 | $32.0M | 0.03% | +24,379+10.6% | Added |
| LSV Asset Management | 251,959 | $31.6M | 0.07% | +9,983+4.1% | Added |
| Adage Capital Partners GP, L.L.C. | 247,937 | $31.1M | 0.05% | +177,170+250.4% | Added |
| FIL Ltd | 244,332 | $30.7M | 0.03% | +124,332+103.6% | Added |
| Russell Investments Group, Ltd. | 242,053 | $30.4M | 0.04% | +34,404+16.6% | Added |
| California State Teachers Retirement System | 238,691 | $30.0M | 0.03% | +8,156+3.5% | Added |
| ProShare Advisors LLC | 238,558 | $30.0M | 0.06% | +13,903+6.2% | Added |
| Alliancebernstein L.P. | 231,108 | $29.0M | 0.01% | +2,054+0.9% | Added |
| Pictet Asset Management Holding SA | 229,342 | $28.9M | 0.03% | +11,812+5.4% | Added |
| Franklin Resources Inc | 229,010 | $28.8M | 0.01% | −359,107−61.1% | Reduced |
| Citigroup Inc | 223,240 | $28.0M | 0.02% | −79,375−26.2% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 217,738 | $27.3M | 0.10% | −60,096−21.6% | Reduced |
| Swedbank AB | 213,719 | $26.8M | 0.03% | +213,719 | New |
| Palo Alto Investors LP | 205,759 | $25.8M | 5.50% | +836+0.4% | Added |
| Logos Global Management LP | 200,000 | $25.1M | 3.36% | +200,000 | New |
| Acadian Asset Management LLC | 199,462 | $25.0M | 0.05% | +181,905+1,036.1% | Added |
| Rafferty Asset Management, LLC | 180,440 | $22.7M | 0.07% | −335−0.2% | Reduced |
| KLP Kapitalforvaltning AS | 166,577 | $20.9M | 0.09% | +10,500+6.7% | Added |
| Wells Fargo & Company | 165,962 | $20.8M | 0.00% | +11,477+7.4% | Added |
| Marshall Wace, LLP | 165,955 | $20.8M | 0.02% | +160,055+2,712.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 163,630 | $20.6M | 0.05% | +11,037+7.2% | Added |
| Gotham Asset Management, LLC | 163,489 | $20.5M | 0.12% | +64,261+64.8% | Added |
| Candriam Luxembourg S.C.A. | 163,315 | $20.5M | 0.12% | −23,465−12.6% | Reduced |
| Principal Financial Group Inc | 159,761 | $20.1M | 0.01% | −5,075−3.1% | Reduced |
| Standard Life Aberdeen plc | 156,755 | $19.7M | 0.03% | +9,942+6.8% | Added |
| Suvretta Capital Management, LLC | 151,890 | $19.1M | 0.72% | +31,154+25.8% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 149,128 | $18.7M | 0.03% | −8,333−5.3% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 147,482 | $18.5M | 0.02% | +14,591+11.0% | Added |
| National Bank of Canada | 143,212 | $18.0M | 0.02% | −58,321−28.9% | Reduced |
| TD Asset Management Inc | 143,027 | $18.0M | 0.02% | −141,349−49.7% | Reduced |
| New York State Common Retirement Fund | 140,245 | $17.6M | 0.02% | +9,099+6.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 139,832 | $17.6M | 0.03% | −4,761−3.3% | Reduced |
| State Board of Administration of Florida Retirement System | 134,847 | $16.9M | 0.03% | +1,300+1.0% | Added |
| Great West Life Assurance Co | 130,933 | $16.5M | 0.03% | +5,426+4.3% | Added |
| ExodusPoint Capital Management, LP | 129,491 | $16.3M | 0.20% | +120,009+1,265.7% | Added |
| Ameriprise Financial Inc | 126,056 | $15.8M | 0.00% | +23,505+22.9% | Added |