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, Q4 2025
Institutional positions in Biogen Inc. as of Dec 31, 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
- 1,002
- +109 vs. Q3 2025
- Shares held
- 139.7M
- +8.71M (+6.6%) vs. Q3 2025
- Total value
- $24.6B
- +$6.26B (+34.1%) vs. Q3 2025
- New holders
- 191
- 323 more added
- Sold out
- 82
- 295 more reduced
16 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ameriprise Financial Inc | 131,761 | $23.2M | 0.01% | −13,648−9.4% | Reduced |
| Federated Hermes, Inc. | 131,168 | $23.1M | 0.04% | +6,246+5.0% | Added |
| Eurizon Capital SGR S.p.A. | 130,813 | $23.0M | 0.07% | +130,813 | New |
| Letko, Brosseau & Associates Inc | 129,780 | $22.8M | 0.37% | +9,160+7.6% | Added |
| State Board of Administration of Florida Retirement System | 125,750 | $22.1M | 0.04% | −5,639−4.3% | Reduced |
| Aviva PLC | 124,898 | $22.0M | 0.04% | +9,192+7.9% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 123,736 | $21.8M | 0.04% | −23,908−16.2% | Reduced |
| Perceptive Advisors LLC | 124,000 | $21.8M | 0.40% | +124,000 | New |
| Wells Fargo & Company | 119,338 | $21.0M | 0.00% | −56,926−32.3% | Reduced |
| Russell Investments Group, Ltd. | 119,087 | $21.0M | 0.02% | −22,261−15.7% | Reduced |
| Braidwell LP | 115,700 | $20.4M | 0.65% | +115,700 | New |
| Bank of Montreal | 113,684 | $20.0M | 0.01% | −11,571−9.2% | Reduced |
| New York State Teachers Retirement System | 111,203 | $19.6M | 0.04% | +1,009+0.9% | Added |
| O'Shaughnessy Asset Management, LLC | 110,268 | $19.4M | 0.11% | +50,279+83.8% | Added |
| Schonfeld Strategic Advisors LLC | 107,068 | $18.8M | 0.09% | −213,086−66.6% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 106,114 | $18.7M | 0.29% | +106,114 | New |
| Manufacturers Life Insurance Company, The | 105,736 | $18.6M | 0.02% | −15,115−12.5% | Reduced |
| Great West Life Assurance Co | 103,100 | $18.2M | 0.03% | −32,557−24.0% | Reduced |
| Woodline Partners LP | 102,318 | $18.0M | 0.07% | +5,652+5.8% | Added |
| Integral Health Asset Management, LLC | 100,000 | $17.6M | 0.89% | +100,000 | New |
| New York State Common Retirement Fund | 99,245 | $17.5M | 0.02% | −44,220−30.8% | Reduced |
| Quantinno Capital Management LP | 98,333 | $17.3M | 0.03% | +30,481+44.9% | Added |
| National Bank of Canada | 96,542 | $17.0M | 0.02% | +23,425+32.0% | Added |
| Walleye Trading LLC | 95,522 | $16.8M | 0.27% | +95,522 | New |
| Sphera Funds Management Ltd. | 94,738 | $16.7M | 3.48% | +12,000+14.5% | Added |
| Rhenman & Partners Asset Management AB | 92,350 | $16.3M | 1.52% | +37,350+67.9% | Added |
| Creative Planning | 90,002 | $15.8M | 0.01% | +21,419+31.2% | Added |
| LPL Financial LLC | 89,537 | $15.8M | 0.00% | +19,373+27.6% | Added |
| American Century Companies Inc | 85,824 | $15.1M | 0.01% | +15,431+21.9% | Added |
| Sector Gamma AS | 85,475 | $15.0M | 3.43% | +10,000+13.2% | Added |
| Portolan Capital Management, LLC | 84,990 | $15.0M | 0.80% | +84,990 | New |
| Handelsbanken Fonder AB | 84,228 | $14.8M | 0.04% | −15,088−15.2% | Reduced |
| Raymond James Financial Inc | 83,714 | $14.7M | 0.00% | +30,372+56.9% | Added |
| Illinois Municipal Retirement Fund | 81,398 | $14.3M | 0.18% | −1,722−2.1% | Reduced |
| APG Asset Management N.V. | 95,072 | $14.2M | 0.04% | −3,202−3.3% | Reduced |
| Eversept Partners, LP | 77,944 | $13.7M | 0.77% | +26,179+50.6% | Added |
| Credit Agricole S A | 76,775 | $13.5M | 0.04% | +39,323+105.0% | Added |
| Cresset Asset Management, LLC | 76,379 | $13.4M | 0.06% | −12,943−14.5% | Reduced |
| State of Wisconsin Investment Board | 75,944 | $13.4M | 0.03% | −1,955−2.5% | Reduced |
| Silverarc Capital Management, LLC | 75,412 | $13.3M | 1.92% | −5,007−6.2% | Reduced |
| Chevy Chase Trust Holdings, Inc. | 74,724 | $13.2M | 0.04% | −447−0.6% | Reduced |
| Privium Fund Management B.V. | 73,480 | $12.9M | 2.38% | +21,555+41.5% | Added |
| State of Tennessee, Treasury Department | 71,467 | $12.9M | 0.04% | −13,996−16.4% | Reduced |
| Treasurer of the State of North Carolina | 72,614 | $12.8M | 0.04% | +6,932+10.6% | Added |
| Banque Pictet & Cie SA | 71,358 | $12.6M | 0.13% | −305−0.4% | Reduced |
| Mackenzie Financial Corp | 71,075 | $12.5M | 0.01% | +7,321+11.5% | Added |
| Brevan Howard Capital Management LP | 71,017 | $12.5M | 0.24% | +37,506+111.9% | Added |
| Cerity Partners LLC | 68,366 | $12.0M | 0.02% | −13,882−16.9% | Reduced |
| Asset Management One Co.,Ltd. | 67,453 | $11.9M | 0.03% | −454−0.7% | Reduced |
| Nomura Asset Management Co Ltd | 67,351 | $11.9M | 0.03% | −180.0% | Reduced |
| Edmond de Rothschild Holding S.A. | 66,970 | $11.8M | 0.17% | 00.0% | Unchanged |
| Mitsubishi UFJ Trust & Banking Corp | 65,318 | $11.5M | 0.03% | −19,342−22.8% | Reduced |
| Contrarius Group Holdings Ltd | 64,952 | $11.4M | 0.55% | +64,952 | New |
| Royal London Asset Management Ltd | 64,565 | $11.4M | 0.02% | −1,406−2.1% | Reduced |
| Voya Investment Management LLC | 62,695 | $11.0M | 0.01% | −594−0.9% | Reduced |
| Ossiam | 62,263 | $11.0M | 0.22% | −3,340−5.1% | Reduced |
| SEI Investments Co | 59,496 | $10.5M | 0.01% | +36,665+160.6% | Added |
| Envestnet Asset Management Inc | 58,819 | $10.4M | 0.00% | +5,429+10.2% | Added |
| Empowered Funds, LLC | 57,961 | $10.2M | 0.17% | +48,918+540.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 57,836 | $10.2M | 0.02% | −79,024−57.7% | Reduced |
| Schroder Investment Management Group | 57,272 | $10.1M | 0.01% | −4,849−7.8% | Reduced |
| Weiss Asset Management LP | 55,560 | $9.78M | 0.14% | +55,560 | New |
| Korea Investment CORP | 53,907 | $9.49M | 0.02% | −6,501−10.8% | Reduced |
| D. E. Shaw & Co., Inc. | 53,754 | $9.46M | 0.01% | −424,170−88.8% | Reduced |
| KBC Group NV | 53,398 | $9.40M | 0.02% | +17,939+50.6% | Added |
| Caption Management, LLC | 53,000 | $9.33M | 0.41% | +48,000+960.0% | Added |
| Mariner, LLC | 52,475 | $9.24M | 0.01% | +4,961+10.4% | Added |
| Cinctive Capital Management LP | 52,173 | $9.18M | 0.53% | −13,664−20.8% | Reduced |
| Stifel Financial Corp | 51,246 | $9.02M | 0.01% | +13,655+36.3% | Added |
| Toronto Dominion Bank | 49,173 | $8.65M | 0.02% | −9,811−16.6% | Reduced |
| Erste Asset Management GmbH | 48,734 | $8.62M | 0.07% | +3,149+6.9% | Added |
| State of New Jersey Common Pension Fund D | 48,945 | $8.61M | 0.03% | 00.0% | Unchanged |
| CWM, LLC | 48,890 | $8.60M | 0.02% | +1,435+3.0% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 48,725 | $8.58M | 0.04% | +417+0.9% | Added |
| Ethic Inc. | 48,591 | $8.55M | 0.13% | +4,095+9.2% | Added |
| Rafferty Asset Management, LLC | 48,559 | $8.55M | 0.03% | −110,068−69.4% | Reduced |
| Danske Bank A/S | 48,415 | $8.52M | 0.02% | +3,705+8.3% | Added |
| Gateway Investment Advisers LLC | 48,161 | $8.48M | 0.08% | +5,835+13.8% | Added |
| Public Employees Retirement System of Ohio | 47,370 | $8.34M | 0.03% | −1,659−3.4% | Reduced |
| Nomura Asset Management International Inc. | 46,340 | $8.15M | 0.01% | +46,340 | New |
| Lazard Asset Management LLC | 46,123 | $8.12M | 0.01% | −10,713−18.8% | Reduced |
| Dakota Wealth Management | 45,897 | $8.08M | 0.14% | +37,220+429.0% | Added |
| Arrowstreet Capital, Limited Partnership | 45,349 | $7.98M | 0.00% | −335,442−88.1% | Reduced |
| Resona Asset Management Co.,Ltd. | 45,186 | $7.96M | 0.04% | −2,074−4.4% | Reduced |
| Adams Diversified Equity Fund, Inc. | 44,300 | $7.80M | 0.26% | +44,300 | New |
| Generali Investments CEE, investicni spolecnost, a.s. | 43,552 | $7.66M | 0.54% | +4,797+12.4% | Added |
| State of Michigan Retirement System | 43,103 | $7.59M | 0.04% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 42,742 | $7.52M | 0.01% | −5,205−10.9% | Reduced |
| Mercer Global Advisors Inc | 42,475 | $7.45M | 0.01% | +1,940+4.8% | Added |
| ProShare Advisors LLC | 41,496 | $7.30M | 0.01% | −155,668−79.0% | Reduced |
| CI Private Wealth, LLC | 41,149 | $7.25M | 0.01% | +6,287+18.0% | Added |
| Wealth Enhancement Advisory Services, LLC | 37,948 | $7.20M | 0.01% | +5,041+15.3% | Added |
| Citadel Advisors LLC | 40,424 | $7.11M | 0.00% | −332,304−89.2% | Reduced |
| Arizona State Retirement System | 40,220 | $7.08M | 0.04% | −3,199−7.4% | Reduced |
| IFM Investors Pty Ltd | 39,855 | $7.01M | 0.06% | +2,365+6.3% | Added |
| Orion Investment Co | 39,404 | $6.93M | 2.12% | −25−0.1% | Reduced |
| The PNC Financial Services Group, Inc. | 38,718 | $6.81M | 0.00% | −984−2.5% | Reduced |
| Czech National Bank | 38,683 | $6.81M | 0.04% | +1,445+3.9% | Added |
| JustInvest LLC | 38,593 | $6.79M | 0.07% | −81−0.2% | Reduced |
| Nisa Investment Advisors, LLC | 38,435 | $6.76M | 0.02% | −9,121−19.2% | Reduced |