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, 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 | 1,046 | $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, 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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 17,289,235 | $2.42B | 0.04% | −1,4160.0% | Reduced |
| Primecap Management Co | 14,954,697 | $2.09B | 1.60% | −847,425−5.4% | Reduced |
| BlackRock, Inc. | 14,763,952 | $2.07B | 0.04% | +1,208,486+8.9% | Added |
| State Street Corp | 7,319,749 | $1.03B | 0.04% | −149,058−2.0% | Reduced |
| Wellington Management Group LLP | 4,246,504 | $594.9M | 0.10% | −551,916−11.5% | Reduced |
| Geode Capital Management, LLC | 4,068,781 | $567.7M | 0.04% | +150,631+3.8% | Added |
| Point72 Asset Management, L.P. | 3,872,901 | $542.5M | 1.18% | +41,174+1.1% | Added |
| Invesco Ltd. | 2,418,127 | $338.7M | 0.05% | +98,001+4.2% | Added |
| Morgan Stanley | 2,251,535 | $315.4M | 0.02% | +295,325+15.1% | Added |
| AQR Capital Management LLC | 1,783,581 | $248.8M | 0.16% | +418,776+30.7% | Added |
| Legal & General Group Plc | 1,593,399 | $223.2M | 0.05% | +146,583+10.1% | Added |
| Northern Trust Corp | 1,499,332 | $210.0M | 0.03% | −37,648−2.4% | Reduced |
| Pacer Advisors, Inc. | 1,451,249 | $203.3M | 0.52% | +131,258+9.9% | Added |
| UBS Asset Management Americas Inc | 1,439,208 | $201.6M | 0.04% | −304,001−17.4% | Reduced |
| Barclays PLC | 1,359,424 | $190.4M | 0.07% | +561,769+70.4% | Added |
| FMR LLC | 1,287,760 | $180.4M | 0.01% | −386,460−23.1% | Reduced |
| JPMorgan Chase & Co | 1,268,350 | $177.7M | 0.01% | +265,848+26.5% | Added |
| Balyasny Asset Management LLC | 1,234,149 | $172.9M | 0.35% | +402,244+48.4% | Added |
| Deutsche Bank AG | 1,231,302 | $172.5M | 0.06% | +108,124+9.6% | Added |
| Bank of America Corp | 1,220,018 | $170.9M | 0.01% | +156,627+14.7% | Added |
| Charles Schwab Investment Management Inc | 1,123,349 | $157.4M | 0.03% | +47,592+4.4% | Added |
| Millennium Management LLC | 1,111,190 | $155.7M | 0.12% | +435,688+64.5% | Added |
| T. Rowe Price Investment Management, Inc. | 1,067,482 | $149.5M | 0.09% | −326,994−23.4% | Reduced |
| Van Eck Associates Corp | 1,066,931 | $149.5M | 0.14% | −7,880−0.7% | Reduced |
| Goldman Sachs Group Inc | 1,063,586 | $149.0M | 0.02% | +392,734+58.5% | Added |
| Price T Rowe Associates Inc | 965,457 | $135.2M | 0.01% | +131,530+15.8% | Added |
| Renaissance Technologies LLC | 964,406 | $135.1M | 0.18% | −80,700−7.7% | Reduced |
| Man Group plc | 918,025 | $128.6M | 0.25% | +124,743+15.7% | Added |
| Marshall Wace, LLP | 887,661 | $124.3M | 0.14% | +721,706+434.9% | Added |
| Bank of New York Mellon Corp | 884,701 | $123.9M | 0.02% | −19,353−2.1% | Reduced |
| Dimensional Fund Advisors LP | 873,094 | $122.3M | 0.03% | −55,402−6.0% | Reduced |
| Alyeska Investment Group, L.P. | 845,277 | $118.4M | 0.36% | +336,504+66.1% | Added |
| First Trust Advisors LP | 840,557 | $117.7M | 0.09% | −33,266−3.8% | Reduced |
| Pictet Asset Management Holding SA | 770,855 | $107.7M | 0.10% | +541,513+236.1% | Added |
| AustralianSuper Pty Ltd | 751,386 | $105.3M | 0.50% | +11,970+1.6% | Added |
| Massachusetts Financial Services Co | 729,316 | $102.2M | 0.03% | +11,685+1.6% | Added |
| Employees Provident Fund Board | 704,196 | $98.6M | 0.79% | 00.0% | Unchanged |
| Amundi | 618,309 | $95.3M | 0.03% | +38,512+6.6% | Added |
| Robeco Institutional Asset Management B.V. | 671,054 | $94.0M | 0.14% | +222,297+49.5% | Added |
| UBS Group AG | 638,965 | $89.5M | 0.02% | +193,281+43.4% | Added |
| Caisse de Depot Et Placement du Quebec | 569,253 | $79.7M | 0.14% | +499,676+718.2% | Added |
| Causeway Capital Management LLC | 567,518 | $79.5M | 1.05% | +74,163+15.0% | Added |
| Royal Bank of Canada | 498,120 | $69.8M | 0.01% | +1,968+0.4% | Added |
| D. E. Shaw & Co., Inc. | 477,924 | $66.9M | 0.05% | −888,283−65.0% | Reduced |
| HSBC Holdings PLC | 447,518 | $62.6M | 0.04% | +4,249+1.0% | Added |
| Susquehanna International Group, LLP | 441,082 | $61.8M | 0.09% | −153,017−25.8% | Reduced |
| Prudential Financial Inc | 439,109 | $61.5M | 0.07% | +51,280+13.2% | Added |
| Swiss National Bank | 422,400 | $59.2M | 0.03% | −20,700−4.7% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 415,609 | $58.2M | 0.03% | +779+0.2% | Added |
| Allianz Asset Management GmbH | 396,803 | $55.6M | 0.07% | −130,257−24.7% | Reduced |
| Patient Capital Management, LLC | 396,649 | $55.6M | 2.22% | +76,183+23.8% | Added |
| BNP Paribas Arbitrage, SA | 395,938 | $55.5M | 0.04% | +939+0.2% | Added |
| Arrowstreet Capital, Limited Partnership | 380,791 | $53.3M | 0.03% | −243,580−39.0% | Reduced |
| Citadel Advisors LLC | 372,728 | $52.2M | 0.04% | −235,862−38.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 348,404 | $48.8M | 0.11% | +282,084+425.3% | Added |
| California Public Employees Retirement System | 343,786 | $48.2M | 0.03% | +4,736+1.4% | Added |
| Nuveen, LLC | 332,457 | $46.6M | 0.01% | −9,202−2.7% | Reduced |
| Adage Capital Partners GP, L.L.C. | 332,132 | $46.5M | 0.07% | +84,195+34.0% | Added |
| Schonfeld Strategic Advisors LLC | 320,154 | $44.8M | 0.31% | +256,165+400.3% | Added |
| FIL Ltd | 307,997 | $43.1M | 0.03% | +63,665+26.1% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 307,379 | $43.1M | 0.03% | +13,110+4.5% | Added |
| LSV Asset Management | 306,839 | $43.0M | 0.09% | +54,880+21.8% | Added |
| Thompson Siegel & Walmsley LLC | 306,442 | $42.9M | 0.70% | −16,576−5.1% | Reduced |
| Rhumbline Advisers | 289,206 | $40.5M | 0.03% | −10,941−3.6% | Reduced |
| National Pension Service | 285,202 | $40.0M | 0.03% | +12,147+4.4% | Added |
| Fisher Asset Management, LLC | 277,285 | $38.8M | 0.01% | −11,852−4.1% | Reduced |
| Vestal Point Capital, LP | 275,000 | $38.5M | 1.75% | +275,000 | New |
| Gotham Asset Management, LLC | 270,498 | $37.9M | 0.16% | +107,009+65.5% | Added |
| Hudson Bay Capital Management LP | 253,151 | $35.5M | 0.22% | −14,589−5.4% | Reduced |
| Canada Pension Plan Investment Board | 239,380 | $33.5M | 0.02% | −15,803−6.2% | Reduced |
| Alliancebernstein L.P. | 237,275 | $33.2M | 0.01% | +6,167+2.7% | Added |
| California State Teachers Retirement System | 234,818 | $32.9M | 0.03% | −3,873−1.6% | Reduced |
| Swedbank AB | 232,439 | $32.6M | 0.03% | +18,720+8.8% | Added |
| Franklin Resources Inc | 229,156 | $32.1M | 0.01% | +146+0.1% | Added |
| Freestone Grove Partners LP | 218,866 | $30.7M | 0.23% | +107,862+97.2% | Added |
| Victory Capital Management Inc | 212,962 | $29.8M | 0.02% | +89,530+72.5% | Added |
| Two Sigma Investments, LP | 205,233 | $28.7M | 0.04% | −302,306−59.6% | Reduced |
| Citigroup Inc | 202,299 | $28.3M | 0.02% | −20,941−9.4% | Reduced |
| ProShare Advisors LLC | 197,164 | $27.6M | 0.06% | −41,394−17.4% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 196,903 | $27.6M | 0.07% | +33,273+20.3% | Added |
| Kames Capital plc | 195,635 | $27.4M | 0.32% | +195,635 | New |
| Acadian Asset Management LLC | 195,251 | $27.3M | 0.05% | −4,211−2.1% | Reduced |
| Wedge Capital Management L L P | 192,872 | $27.0M | 0.46% | +192,872 | New |
| Los Angeles Capital Management LLC | 191,364 | $26.8M | 0.09% | +147,006+331.4% | Added |
| Palo Alto Investors LP | 185,661 | $26.0M | 4.81% | −20,098−9.8% | Reduced |
| Wells Fargo & Company | 176,264 | $24.7M | 0.01% | +10,302+6.2% | Added |
| Suvretta Capital Management, LLC | 168,190 | $23.6M | 0.71% | +16,300+10.7% | Added |
| KLP Kapitalforvaltning AS | 166,577 | $23.3M | 0.09% | 00.0% | Unchanged |
| TD Asset Management Inc | 161,195 | $22.6M | 0.02% | +18,168+12.7% | Added |
| Candriam Luxembourg S.C.A. | 158,821 | $22.2M | 0.12% | −4,494−2.8% | Reduced |
| Rafferty Asset Management, LLC | 158,627 | $22.2M | 0.07% | −21,813−12.1% | Reduced |
| Principal Financial Group Inc | 157,842 | $22.1M | 0.01% | −1,919−1.2% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 147,644 | $20.7M | 0.03% | −1,484−1.0% | Reduced |
| Ameriprise Financial Inc | 145,409 | $20.4M | 0.00% | +19,353+15.4% | Added |
| New York State Common Retirement Fund | 143,465 | $20.1M | 0.03% | +3,220+2.3% | Added |
| Russell Investments Group, Ltd. | 141,348 | $19.8M | 0.02% | −100,705−41.6% | Reduced |
| Standard Life Aberdeen plc | 138,865 | $19.5M | 0.03% | −17,890−11.4% | Reduced |
| Banco Bilbao Vizcaya Argentaria, S.A. | 138,654 | $19.4M | 0.15% | +23,782+20.7% | Added |
| Ieq Capital, LLC | 138,281 | $19.4M | 0.06% | +26,030+23.2% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 136,860 | $19.2M | 0.03% | −2,972−2.1% | Reduced |