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, Q3 2025
Institutional positions in Biogen Inc. as of Sep 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
- 909
- +52 vs. Q2 2025
- Shares held
- 131.3M
- +3.52M (+2.8%) vs. Q2 2025
- Total value
- $18.4B
- +$2.32B (+14.5%) vs. Q2 2025
- New holders
- 125
- 323 more added
- Sold out
- 73
- 268 more reduced
10 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Qube Research & Technologies Ltd | 121,607 | $17.0M | 0.02% | −621,702−83.6% | Reduced |
| Nomura Holdings Inc | 122,902 | $17.2M | 0.08% | +2,087+1.7% | Added |
| Federated Hermes, Inc. | 124,922 | $17.5M | 0.03% | +4,645+3.9% | Added |
| Bank of Montreal | 125,255 | $17.5M | 0.01% | +21,941+21.2% | Added |
| Nordea Investment Management AB | 132,583 | $18.2M | 0.02% | +6,648+5.3% | Added |
| Parkman Healthcare Partners LLC | 130,165 | $18.2M | 2.00% | +130,165 | New |
| State Board of Administration of Florida Retirement System | 131,389 | $18.4M | 0.03% | −3,458−2.6% | Reduced |
| Great West Life Assurance Co | 135,657 | $18.8M | 0.03% | +4,724+3.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 136,860 | $19.2M | 0.03% | −2,972−2.1% | Reduced |
| Ieq Capital, LLC | 138,281 | $19.4M | 0.06% | +26,030+23.2% | Added |
| Banco Bilbao Vizcaya Argentaria, S.A. | 138,654 | $19.4M | 0.15% | +23,782+20.7% | Added |
| Standard Life Aberdeen plc | 138,865 | $19.5M | 0.03% | −17,890−11.4% | Reduced |
| Russell Investments Group, Ltd. | 141,348 | $19.8M | 0.02% | −100,705−41.6% | Reduced |
| New York State Common Retirement Fund | 143,465 | $20.1M | 0.03% | +3,220+2.3% | Added |
| Ameriprise Financial Inc | 145,409 | $20.4M | 0.00% | +19,353+15.4% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 147,644 | $20.7M | 0.03% | −1,484−1.0% | Reduced |
| Principal Financial Group Inc | 157,842 | $22.1M | 0.01% | −1,919−1.2% | Reduced |
| Rafferty Asset Management, LLC | 158,627 | $22.2M | 0.07% | −21,813−12.1% | Reduced |
| Candriam Luxembourg S.C.A. | 158,821 | $22.2M | 0.12% | −4,494−2.8% | Reduced |
| TD Asset Management Inc | 161,195 | $22.6M | 0.02% | +18,168+12.7% | Added |
| KLP Kapitalforvaltning AS | 166,577 | $23.3M | 0.09% | 00.0% | Unchanged |
| Suvretta Capital Management, LLC | 168,190 | $23.6M | 0.71% | +16,300+10.7% | Added |
| Wells Fargo & Company | 176,264 | $24.7M | 0.01% | +10,302+6.2% | Added |
| Palo Alto Investors LP | 185,661 | $26.0M | 4.81% | −20,098−9.8% | Reduced |
| Los Angeles Capital Management LLC | 191,364 | $26.8M | 0.09% | +147,006+331.4% | Added |
| Wedge Capital Management L L P | 192,872 | $27.0M | 0.46% | +192,872 | New |
| Acadian Asset Management LLC | 195,251 | $27.3M | 0.05% | −4,211−2.1% | Reduced |
| Kames Capital plc | 195,635 | $27.4M | 0.32% | +195,635 | New |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 196,903 | $27.6M | 0.07% | +33,273+20.3% | Added |
| ProShare Advisors LLC | 197,164 | $27.6M | 0.06% | −41,394−17.4% | Reduced |
| Citigroup Inc | 202,299 | $28.3M | 0.02% | −20,941−9.4% | Reduced |
| Two Sigma Investments, LP | 205,233 | $28.7M | 0.04% | −302,306−59.6% | Reduced |
| Victory Capital Management Inc | 212,962 | $29.8M | 0.02% | +89,530+72.5% | Added |
| Freestone Grove Partners LP | 218,866 | $30.7M | 0.23% | +107,862+97.2% | Added |
| Franklin Resources Inc | 229,156 | $32.1M | 0.01% | +146+0.1% | Added |
| Swedbank AB | 232,439 | $32.6M | 0.03% | +18,720+8.8% | Added |
| California State Teachers Retirement System | 234,818 | $32.9M | 0.03% | −3,873−1.6% | Reduced |
| Alliancebernstein L.P. | 237,275 | $33.2M | 0.01% | +6,167+2.7% | Added |
| Canada Pension Plan Investment Board | 239,380 | $33.5M | 0.02% | −15,803−6.2% | Reduced |
| Hudson Bay Capital Management LP | 253,151 | $35.5M | 0.22% | −14,589−5.4% | Reduced |
| Gotham Asset Management, LLC | 270,498 | $37.9M | 0.16% | +107,009+65.5% | Added |
| Vestal Point Capital, LP | 275,000 | $38.5M | 1.75% | +275,000 | New |
| Fisher Asset Management, LLC | 277,285 | $38.8M | 0.01% | −11,852−4.1% | Reduced |
| National Pension Service | 285,202 | $40.0M | 0.03% | +12,147+4.4% | Added |
| Rhumbline Advisers | 289,206 | $40.5M | 0.03% | −10,941−3.6% | Reduced |
| Thompson Siegel & Walmsley LLC | 306,442 | $42.9M | 0.70% | −16,576−5.1% | Reduced |
| LSV Asset Management | 306,839 | $43.0M | 0.09% | +54,880+21.8% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 307,379 | $43.1M | 0.03% | +13,110+4.5% | Added |
| FIL Ltd | 307,997 | $43.1M | 0.03% | +63,665+26.1% | Added |
| Schonfeld Strategic Advisors LLC | 320,154 | $44.8M | 0.31% | +256,165+400.3% | Added |
| Adage Capital Partners GP, L.L.C. | 332,132 | $46.5M | 0.07% | +84,195+34.0% | Added |
| Nuveen, LLC | 332,457 | $46.6M | 0.01% | −9,202−2.7% | Reduced |
| California Public Employees Retirement System | 343,786 | $48.2M | 0.03% | +4,736+1.4% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 348,404 | $48.8M | 0.11% | +282,084+425.3% | Added |
| Citadel Advisors LLC | 372,728 | $52.2M | 0.04% | −235,862−38.8% | Reduced |
| Arrowstreet Capital, Limited Partnership | 380,791 | $53.3M | 0.03% | −243,580−39.0% | Reduced |
| BNP Paribas Arbitrage, SA | 395,938 | $55.5M | 0.04% | +939+0.2% | Added |
| Patient Capital Management, LLC | 396,649 | $55.6M | 2.22% | +76,183+23.8% | Added |
| Allianz Asset Management GmbH | 396,803 | $55.6M | 0.07% | −130,257−24.7% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 415,609 | $58.2M | 0.03% | +779+0.2% | Added |
| Swiss National Bank | 422,400 | $59.2M | 0.03% | −20,700−4.7% | Reduced |
| Prudential Financial Inc | 439,109 | $61.5M | 0.07% | +51,280+13.2% | Added |
| Susquehanna International Group, LLP | 441,082 | $61.8M | 0.09% | −153,017−25.8% | Reduced |
| HSBC Holdings PLC | 447,518 | $62.6M | 0.04% | +4,249+1.0% | Added |
| D. E. Shaw & Co., Inc. | 477,924 | $66.9M | 0.05% | −888,283−65.0% | Reduced |
| Royal Bank of Canada | 498,120 | $69.8M | 0.01% | +1,968+0.4% | Added |
| Causeway Capital Management LLC | 567,518 | $79.5M | 1.05% | +74,163+15.0% | Added |
| Caisse de Depot Et Placement du Quebec | 569,253 | $79.7M | 0.14% | +499,676+718.2% | Added |
| UBS Group AG | 638,965 | $89.5M | 0.02% | +193,281+43.4% | Added |
| Robeco Institutional Asset Management B.V. | 671,054 | $94.0M | 0.14% | +222,297+49.5% | Added |
| Amundi | 618,309 | $95.3M | 0.03% | +38,512+6.6% | Added |
| Employees Provident Fund Board | 704,196 | $98.6M | 0.79% | 00.0% | Unchanged |
| Massachusetts Financial Services Co | 729,316 | $102.2M | 0.03% | +11,685+1.6% | Added |
| AustralianSuper Pty Ltd | 751,386 | $105.3M | 0.50% | +11,970+1.6% | Added |
| Pictet Asset Management Holding SA | 770,855 | $107.7M | 0.10% | +541,513+236.1% | Added |
| First Trust Advisors LP | 840,557 | $117.7M | 0.09% | −33,266−3.8% | Reduced |
| Alyeska Investment Group, L.P. | 845,277 | $118.4M | 0.36% | +336,504+66.1% | Added |
| Dimensional Fund Advisors LP | 873,094 | $122.3M | 0.03% | −55,402−6.0% | Reduced |
| Bank of New York Mellon Corp | 884,701 | $123.9M | 0.02% | −19,353−2.1% | Reduced |
| Marshall Wace, LLP | 887,661 | $124.3M | 0.14% | +721,706+434.9% | Added |
| Man Group plc | 918,025 | $128.6M | 0.25% | +124,743+15.7% | Added |
| Renaissance Technologies LLC | 964,406 | $135.1M | 0.18% | −80,700−7.7% | Reduced |
| Price T Rowe Associates Inc | 965,457 | $135.2M | 0.01% | +131,530+15.8% | Added |
| Goldman Sachs Group Inc | 1,063,586 | $149.0M | 0.02% | +392,734+58.5% | Added |
| Van Eck Associates Corp | 1,066,931 | $149.5M | 0.14% | −7,880−0.7% | Reduced |
| T. Rowe Price Investment Management, Inc. | 1,067,482 | $149.5M | 0.09% | −326,994−23.4% | Reduced |
| Millennium Management LLC | 1,111,190 | $155.7M | 0.12% | +435,688+64.5% | Added |
| Charles Schwab Investment Management Inc | 1,123,349 | $157.4M | 0.03% | +47,592+4.4% | Added |
| Bank of America Corp | 1,220,018 | $170.9M | 0.01% | +156,627+14.7% | Added |
| Deutsche Bank AG | 1,231,302 | $172.5M | 0.06% | +108,124+9.6% | Added |
| Balyasny Asset Management LLC | 1,234,149 | $172.9M | 0.35% | +402,244+48.4% | Added |
| JPMorgan Chase & Co | 1,268,350 | $177.7M | 0.01% | +265,848+26.5% | Added |
| FMR LLC | 1,287,760 | $180.4M | 0.01% | −386,460−23.1% | Reduced |
| Barclays PLC | 1,359,424 | $190.4M | 0.07% | +561,769+70.4% | Added |
| UBS Asset Management Americas Inc | 1,439,208 | $201.6M | 0.04% | −304,001−17.4% | Reduced |
| Pacer Advisors, Inc. | 1,451,249 | $203.3M | 0.52% | +131,258+9.9% | Added |
| Northern Trust Corp | 1,499,332 | $210.0M | 0.03% | −37,648−2.4% | Reduced |
| Legal & General Group Plc | 1,593,399 | $223.2M | 0.05% | +146,583+10.1% | Added |
| AQR Capital Management LLC | 1,783,581 | $248.8M | 0.16% | +418,776+30.7% | Added |
| Morgan Stanley | 2,251,535 | $315.4M | 0.02% | +295,325+15.1% | Added |