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 2026
Institutional positions in Biogen Inc. as of Jun 30, 2026. 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
- 1,046
- +42 vs. Q1 2026
- Shares held
- 142.3M
- +7.45M (+5.5%) vs. Q1 2026
- Total value
- $30.7B
- +$6.00B (+24.3%) vs. Q1 2026
- New holders
- 126
- 427 more added
- Sold out
- 84
- 296 more reduced
11 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 18,217,239 | $3.94B | 0.17% | +5,409,698+42.2% | Added |
| BlackRock, Inc. | 15,985,736 | $3.45B | 0.05% | +11,135+0.1% | Added |
| Primecap Management Co | 15,154,606 | $3.27B | 1.94% | +396,999+2.7% | Added |
| Vanguard Capital Management LLC | 9,651,117 | $2.09B | 0.04% | +113,700+1.2% | Added |
| State Street Corp | 7,344,327 | $1.59B | 0.05% | +176,405+2.5% | Added |
| Vanguard Portfolio Management LLC | 6,604,936 | $1.43B | 0.06% | +73,209+1.1% | Added |
| Geode Capital Management, LLC | 4,449,295 | $957.9M | 0.05% | +106,693+2.5% | Added |
| Wellington Management Group LLP | 3,117,469 | $673.6M | 0.12% | +155,828+5.3% | Added |
| Norges Bank | 2,580,033 | $557.4M | 0.06% | +2,580,033 | New |
| Morgan Stanley | 2,411,271 | $521.0M | 0.03% | +240,331+11.1% | Added |
| AQR Capital Management LLC | 1,936,859 | $416.9M | 0.15% | +13,302+0.7% | Added |
| JPMorgan Chase & Co | 1,823,140 | $394.9M | 0.02% | −192,869−9.6% | Reduced |
| Invesco Ltd. | 1,803,944 | $389.8M | 0.03% | +58,689+3.4% | Added |
| Amundi | 1,516,831 | $327.7M | 0.08% | +726,004+91.8% | Added |
| Legal & General Group Plc | 1,493,289 | $322.6M | 0.07% | +143,457+10.6% | Added |
| Northern Trust Corp | 1,429,490 | $308.9M | 0.04% | −17,089−1.2% | Reduced |
| Boston Partners | 1,263,429 | $272.8M | 0.24% | −436,649−25.7% | Reduced |
| UBS Asset Management Americas Inc | 1,255,168 | $271.2M | 0.05% | −122,400−8.9% | Reduced |
| Goldman Sachs Group Inc | 1,230,390 | $265.8M | 0.03% | +179,296+17.1% | Added |
| Dimensional Fund Advisors LP | 1,148,568 | $248.2M | 0.04% | +69,449+6.4% | Added |
| Pacer Advisors, Inc. | 1,122,981 | $242.6M | 0.63% | +462,573+70.0% | Added |
| Charles Schwab Investment Management Inc | 1,117,663 | $241.5M | 0.03% | −31,731−2.8% | Reduced |
| Bank of America Corp | 1,116,228 | $241.2M | 0.02% | −40,141−3.5% | Reduced |
| UBS Group AG | 1,030,150 | $222.6M | 0.04% | +506,700+96.8% | Added |
| Alyeska Investment Group, L.P. | 932,374 | $201.4M | 0.52% | +127,324+15.8% | Added |
| Deutsche Bank AG | 894,035 | $193.2M | 0.06% | −169,793−16.0% | Reduced |
| Pictet Asset Management Holding SA | 851,819 | $184.1M | 0.18% | −61,509−6.7% | Reduced |
| Vanguard Fiduciary Trust Co | 829,318 | $179.2M | 0.04% | +3,787+0.5% | Added |
| Robeco Institutional Asset Management B.V. | 791,092 | $170.9M | 0.21% | +27,918+3.7% | Added |
| Fred Alger Management, LLC | 788,307 | $170.3M | 0.57% | +55,113+7.5% | Added |
| Price T Rowe Associates Inc | 774,283 | $167.3M | 0.02% | +101,856+15.1% | Added |
| Bank of New York Mellon Corp | 773,619 | $167.1M | 0.03% | −14,904−1.9% | Reduced |
| Massachusetts Financial Services Co | 744,892 | $163.1M | 0.05% | +24,263+3.4% | Added |
| Citigroup Inc | 734,517 | $158.7M | 0.07% | +234,010+46.8% | Added |
| Royal Bank of Canada | 708,562 | $153.1M | 0.03% | +177,185+33.3% | Added |
| Employees Provident Fund Board | 704,196 | $152.1M | 0.87% | 00.0% | Unchanged |
| First Trust Advisors LP | 682,021 | $147.4M | 0.09% | +8,063+1.2% | Added |
| AustralianSuper Pty Ltd | 672,723 | $145.3M | 0.63% | +56,530+9.2% | Added |
| Artemis Investment Management LLP | 570,974 | $123.4M | 1.10% | −597−0.1% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 540,001 | $116.7M | 0.22% | +17,846+3.4% | Added |
| HSBC Holdings PLC | 527,866 | $114.0M | 0.05% | +64,214+13.8% | Added |
| Caisse de Depot Et Placement du Quebec | 510,194 | $110.2M | 0.16% | −8,500−1.6% | Reduced |
| LSV Asset Management | 444,049 | $95.9M | 0.17% | +110,310+33.1% | Added |
| Citadel Advisors LLC | 418,356 | $90.4M | 0.05% | +280,263+203.0% | Added |
| Swiss National Bank | 413,900 | $89.4M | 0.05% | −16,700−3.9% | Reduced |
| National Pension Service | 406,064 | $87.7M | 0.06% | +4,397+1.1% | Added |
| BNP Paribas Arbitrage, SA | 387,542 | $83.7M | 0.04% | −83,526−17.7% | Reduced |
| Candriam Luxembourg S.C.A. | 384,326 | $83.0M | 0.37% | +2,558+0.7% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 358,823 | $77.5M | 0.04% | +24,410+7.3% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 346,617 | $74.9M | 0.04% | −9,674−2.7% | Reduced |
| Victory Capital Management Inc | 343,419 | $74.2M | 0.04% | +22,634+7.1% | Added |
| FIL Ltd | 342,623 | $74.0M | 0.05% | +24,567+7.7% | Added |
| Fisher Asset Management, LLC | 338,018 | $73.0M | 0.02% | +25,400+8.1% | Added |
| Vanguard Global Advisers, LLC | 335,936 | $72.6M | 0.03% | −7,832−2.3% | Reduced |
| California Public Employees Retirement System | 329,106 | $71.1M | 0.04% | −11,797−3.5% | Reduced |
| Swedbank AB | 320,622 | $69.3M | 0.06% | +30,782+10.6% | Added |
| Nuveen, LLC | 317,204 | $68.5M | 0.02% | −41,634−11.6% | Reduced |
| Vanguard Asset Management, Ltd | 284,376 | $61.4M | 0.04% | +34,598+13.9% | Added |
| Patient Capital Management, LLC | 283,697 | $61.3M | 2.04% | −96,044−25.3% | Reduced |
| Gotham Asset Management, LLC | 279,900 | $60.5M | 0.14% | −18,537−6.2% | Reduced |
| KBC Group NV | 278,652 | $60.2M | 0.13% | +43,960+18.7% | Added |
| Causeway Capital Management LLC | 278,283 | $60.1M | 0.65% | −2,500−0.9% | Reduced |
| Perceptive Advisors LLC | 276,173 | $59.7M | 0.93% | +276,173 | New |
| Balyasny Asset Management LLC | 265,090 | $57.3M | 0.10% | −384,956−59.2% | Reduced |
| Rhumbline Advisers | 262,979 | $56.8M | 0.04% | −12,459−4.5% | Reduced |
| Barclays PLC | 247,157 | $53.4M | 0.02% | −304,317−55.2% | Reduced |
| Voya Investment Management LLC | 246,782 | $53.3M | 0.05% | +192,221+352.3% | Added |
| Kames Capital plc | 241,101 | $52.1M | 0.56% | −17,634−6.8% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 234,138 | $50.6M | 0.05% | +18,702+8.7% | Added |
| California State Teachers Retirement System | 220,009 | $47.5M | 0.04% | −678−0.3% | Reduced |
| KLP Kapitalforvaltning AS | 199,177 | $43.0M | 0.14% | 00.0% | Unchanged |
| Man Group plc | 196,222 | $42.4M | 0.08% | −122,523−38.4% | Reduced |
| Panagora Asset Management Inc | 186,929 | $40.4M | 0.12% | +44,864+31.6% | Added |
| Nissay Asset Management Corp | 185,301 | $40.0M | 0.17% | +155,539+522.6% | Added |
| Principal Financial Group Inc | 184,450 | $39.9M | 0.02% | −2,609−1.4% | Reduced |
| Alliancebernstein L.P. | 214,975 | $39.4M | 0.01% | +2,078+1.0% | Added |
| Allianz Asset Management GmbH | 180,079 | $38.9M | 0.04% | +2,030+1.1% | Added |
| Jupiter Asset Management Ltd | 160,057 | $34.6M | 0.17% | +152,916+2,141.4% | Added |
| Quantinno Capital Management LP | 151,977 | $32.8M | 0.04% | +35,603+30.6% | Added |
| Treasurer of the State of North Carolina | 148,629 | $32.1M | 0.08% | +73,450+97.7% | Added |
| Letko, Brosseau & Associates Inc | 146,562 | $31.7M | 0.47% | −4,303−2.9% | Reduced |
| Portolan Capital Management, LLC | 142,856 | $30.9M | 1.16% | +24,375+20.6% | Added |
| Palo Alto Investors LP | 140,279 | $30.3M | 4.19% | −440−0.3% | Reduced |
| Walleye Trading LLC | 139,253 | $30.1M | 0.42% | +39,721+39.9% | Added |
| Creative Planning | 138,613 | $29.9M | 0.02% | +21,377+18.2% | Added |
| O'Shaughnessy Asset Management, LLC | 138,260 | $29.9M | 0.14% | −3,064−2.2% | Reduced |
| Franklin Resources Inc | 137,436 | $29.7M | 0.01% | −7,012−4.9% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 137,220 | $29.6M | 1.18% | +103,650+308.8% | Added |
| Russell Investments Group, Ltd. | 133,894 | $29.0M | 0.03% | −1,947−1.4% | Reduced |
| Ieq Capital, LLC | 132,142 | $28.6M | 0.13% | −19,934−13.1% | Reduced |
| Thompson Siegel & Walmsley LLC | 130,512 | $28.2M | 0.51% | −117,831−47.4% | Reduced |
| Lord, Abbett & Co. LLC | 130,184 | $28.1M | 0.08% | +130,184 | New |
| Acadian Asset Management LLC | 129,878 | $28.1M | 0.03% | −118,611−47.7% | Reduced |
| Adage Capital Partners GP, L.L.C. | 129,599 | $28.0M | 0.04% | −203,858−61.1% | Reduced |
| Wells Fargo & Company | 128,664 | $27.8M | 0.00% | +1,530+1.2% | Added |
| Standard Life Aberdeen plc | 128,227 | $27.7M | 0.04% | −22,917−15.2% | Reduced |
| Bank of Montreal | 124,267 | $26.8M | 0.01% | +31,558+34.0% | Added |
| Great West Life Assurance Co | 122,258 | $26.4M | 0.04% | +535+0.4% | Added |
| State Board of Administration of Florida Retirement System | 121,311 | $26.2M | 0.04% | −2,901−2.3% | Reduced |
| American Century Companies Inc | 114,152 | $24.7M | 0.01% | +9,369+8.9% | Added |