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
- 1,001
- +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
- 322 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 |
|---|---|---|---|---|---|
| Bridger Management, LLC | 36,065 | $6.35M | 4.08% | +36,065 | New |
| Nisa Investment Advisors, LLC | 38,435 | $6.76M | 0.02% | −9,121−19.2% | Reduced |
| JustInvest LLC | 38,593 | $6.79M | 0.07% | −81−0.2% | Reduced |
| Czech National Bank | 38,683 | $6.81M | 0.04% | +1,445+3.9% | Added |
| The PNC Financial Services Group, Inc. | 38,718 | $6.81M | 0.00% | −984−2.5% | Reduced |
| Orion Investment Co | 39,404 | $6.93M | 2.12% | −25−0.1% | Reduced |
| IFM Investors Pty Ltd | 39,855 | $7.01M | 0.06% | +2,365+6.3% | Added |
| Arizona State Retirement System | 40,220 | $7.08M | 0.04% | −3,199−7.4% | Reduced |
| Citadel Advisors LLC | 40,424 | $7.11M | 0.00% | −332,304−89.2% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 37,948 | $7.20M | 0.01% | +5,041+15.3% | Added |
| CI Private Wealth, LLC | 41,149 | $7.25M | 0.01% | +6,287+18.0% | Added |
| ProShare Advisors LLC | 41,496 | $7.30M | 0.01% | −155,668−79.0% | Reduced |
| Mercer Global Advisors Inc | 42,475 | $7.45M | 0.01% | +1,940+4.8% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 42,742 | $7.52M | 0.01% | −5,205−10.9% | Reduced |
| State of Michigan Retirement System | 43,103 | $7.59M | 0.04% | 00.0% | Unchanged |
| Generali Investments CEE, investicni spolecnost, a.s. | 43,552 | $7.66M | 0.54% | +4,797+12.4% | Added |
| Adams Diversified Equity Fund, Inc. | 44,300 | $7.80M | 0.26% | +44,300 | New |
| Resona Asset Management Co.,Ltd. | 45,186 | $7.96M | 0.04% | −2,074−4.4% | Reduced |
| Arrowstreet Capital, Limited Partnership | 45,349 | $7.98M | 0.00% | −335,442−88.1% | Reduced |
| Dakota Wealth Management | 45,897 | $8.08M | 0.14% | +37,220+429.0% | Added |
| Lazard Asset Management LLC | 46,123 | $8.12M | 0.01% | −10,713−18.8% | Reduced |
| Nomura Asset Management International Inc. | 46,340 | $8.15M | 0.01% | +46,340 | New |
| Public Employees Retirement System of Ohio | 47,370 | $8.34M | 0.03% | −1,659−3.4% | Reduced |
| Gateway Investment Advisers LLC | 48,161 | $8.48M | 0.08% | +5,835+13.8% | Added |
| Danske Bank A/S | 48,415 | $8.52M | 0.02% | +3,705+8.3% | Added |
| Rafferty Asset Management, LLC | 48,559 | $8.55M | 0.03% | −110,068−69.4% | Reduced |
| Ethic Inc. | 48,591 | $8.55M | 0.13% | +4,095+9.2% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 48,725 | $8.58M | 0.04% | +417+0.9% | Added |
| CWM, LLC | 48,890 | $8.60M | 0.02% | +1,435+3.0% | Added |
| State of New Jersey Common Pension Fund D | 48,945 | $8.61M | 0.03% | 00.0% | Unchanged |
| Erste Asset Management GmbH | 48,734 | $8.62M | 0.07% | +3,149+6.9% | Added |
| Toronto Dominion Bank | 49,173 | $8.65M | 0.02% | −9,811−16.6% | Reduced |
| Stifel Financial Corp | 51,246 | $9.02M | 0.01% | +13,655+36.3% | Added |
| Cinctive Capital Management LP | 52,173 | $9.18M | 0.53% | −13,664−20.8% | Reduced |
| Mariner, LLC | 52,475 | $9.24M | 0.01% | +4,961+10.4% | Added |
| Caption Management, LLC | 53,000 | $9.33M | 0.41% | +48,000+960.0% | Added |
| KBC Group NV | 53,398 | $9.40M | 0.02% | +17,939+50.6% | Added |
| D. E. Shaw & Co., Inc. | 53,754 | $9.46M | 0.01% | −424,170−88.8% | Reduced |
| Korea Investment CORP | 53,907 | $9.49M | 0.02% | −6,501−10.8% | Reduced |
| Weiss Asset Management LP | 55,560 | $9.78M | 0.14% | +55,560 | New |
| Schroder Investment Management Group | 57,272 | $10.1M | 0.01% | −4,849−7.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 57,836 | $10.2M | 0.02% | −79,024−57.7% | Reduced |
| Empowered Funds, LLC | 57,961 | $10.2M | 0.17% | +48,918+540.9% | Added |
| Envestnet Asset Management Inc | 58,819 | $10.4M | 0.00% | +5,429+10.2% | Added |
| SEI Investments Co | 59,496 | $10.5M | 0.01% | +36,665+160.6% | Added |
| Ossiam | 62,263 | $11.0M | 0.22% | −3,340−5.1% | Reduced |
| Voya Investment Management LLC | 62,695 | $11.0M | 0.01% | −594−0.9% | Reduced |
| Royal London Asset Management Ltd | 64,565 | $11.4M | 0.02% | −1,406−2.1% | Reduced |
| Contrarius Group Holdings Ltd | 64,952 | $11.4M | 0.55% | +64,952 | New |
| Mitsubishi UFJ Trust & Banking Corp | 65,318 | $11.5M | 0.03% | −19,342−22.8% | Reduced |
| Edmond de Rothschild Holding S.A. | 66,970 | $11.8M | 0.17% | 00.0% | Unchanged |
| Nomura Asset Management Co Ltd | 67,351 | $11.9M | 0.03% | −180.0% | Reduced |
| Asset Management One Co.,Ltd. | 67,453 | $11.9M | 0.03% | −454−0.7% | Reduced |
| Cerity Partners LLC | 68,366 | $12.0M | 0.02% | −13,882−16.9% | Reduced |
| Brevan Howard Capital Management LP | 71,017 | $12.5M | 0.24% | +37,506+111.9% | Added |
| Mackenzie Financial Corp | 71,075 | $12.5M | 0.01% | +7,321+11.5% | Added |
| Banque Pictet & Cie SA | 71,358 | $12.6M | 0.13% | −305−0.4% | Reduced |
| Treasurer of the State of North Carolina | 72,614 | $12.8M | 0.04% | +6,932+10.6% | Added |
| State of Tennessee, Treasury Department | 71,467 | $12.9M | 0.04% | −13,996−16.4% | Reduced |
| Privium Fund Management B.V. | 73,480 | $12.9M | 2.38% | +21,555+41.5% | Added |
| Chevy Chase Trust Holdings, Inc. | 74,724 | $13.2M | 0.04% | −447−0.6% | Reduced |
| Silverarc Capital Management, LLC | 75,412 | $13.3M | 1.92% | −5,007−6.2% | Reduced |
| State of Wisconsin Investment Board | 75,944 | $13.4M | 0.03% | −1,955−2.5% | Reduced |
| Cresset Asset Management, LLC | 76,379 | $13.4M | 0.06% | −12,943−14.5% | Reduced |
| Credit Agricole S A | 76,775 | $13.5M | 0.04% | +39,323+105.0% | Added |
| Eversept Partners, LP | 77,944 | $13.7M | 0.77% | +26,179+50.6% | Added |
| APG Asset Management N.V. | 95,072 | $14.2M | 0.04% | −3,202−3.3% | Reduced |
| Illinois Municipal Retirement Fund | 81,398 | $14.3M | 0.18% | −1,722−2.1% | Reduced |
| Raymond James Financial Inc | 83,714 | $14.7M | 0.00% | +30,372+56.9% | Added |
| Handelsbanken Fonder AB | 84,228 | $14.8M | 0.04% | −15,088−15.2% | Reduced |
| Portolan Capital Management, LLC | 84,990 | $15.0M | 0.80% | +84,990 | New |
| Sector Gamma AS | 85,475 | $15.0M | 3.43% | +10,000+13.2% | Added |
| American Century Companies Inc | 85,824 | $15.1M | 0.01% | +15,431+21.9% | Added |
| LPL Financial LLC | 89,537 | $15.8M | 0.00% | +19,373+27.6% | Added |
| Creative Planning | 90,002 | $15.8M | 0.01% | +21,419+31.2% | Added |
| Rhenman & Partners Asset Management AB | 92,350 | $16.3M | 1.52% | +37,350+67.9% | Added |
| Sphera Funds Management Ltd. | 94,738 | $16.7M | 3.48% | +12,000+14.5% | Added |
| Walleye Trading LLC | 95,522 | $16.8M | 0.27% | +95,522 | New |
| National Bank of Canada | 96,542 | $17.0M | 0.02% | +23,425+32.0% | Added |
| Quantinno Capital Management LP | 98,333 | $17.3M | 0.03% | +30,481+44.9% | Added |
| New York State Common Retirement Fund | 99,245 | $17.5M | 0.02% | −44,220−30.8% | Reduced |
| Integral Health Asset Management, LLC | 100,000 | $17.6M | 0.89% | +100,000 | New |
| Woodline Partners LP | 102,318 | $18.0M | 0.07% | +5,652+5.8% | Added |
| Great West Life Assurance Co | 103,100 | $18.2M | 0.03% | −32,557−24.0% | Reduced |
| Manufacturers Life Insurance Company, The | 105,736 | $18.6M | 0.02% | −15,115−12.5% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 106,114 | $18.7M | 0.29% | +106,114 | New |
| Schonfeld Strategic Advisors LLC | 107,068 | $18.8M | 0.09% | −213,086−66.6% | Reduced |
| O'Shaughnessy Asset Management, LLC | 110,268 | $19.4M | 0.11% | +50,279+83.8% | Added |
| New York State Teachers Retirement System | 111,203 | $19.6M | 0.04% | +1,009+0.9% | Added |
| Bank of Montreal | 113,684 | $20.0M | 0.01% | −11,571−9.2% | Reduced |
| Braidwell LP | 115,700 | $20.4M | 0.65% | +115,700 | New |
| Russell Investments Group, Ltd. | 119,087 | $21.0M | 0.02% | −22,261−15.7% | Reduced |
| Wells Fargo & Company | 119,338 | $21.0M | 0.00% | −56,926−32.3% | Reduced |
| Perceptive Advisors LLC | 124,000 | $21.8M | 0.40% | +124,000 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 123,736 | $21.8M | 0.04% | −23,908−16.2% | Reduced |
| Aviva PLC | 124,898 | $22.0M | 0.04% | +9,192+7.9% | Added |
| State Board of Administration of Florida Retirement System | 125,750 | $22.1M | 0.04% | −5,639−4.3% | Reduced |
| Letko, Brosseau & Associates Inc | 129,780 | $22.8M | 0.37% | +9,160+7.6% | Added |
| Eurizon Capital SGR S.p.A. | 130,813 | $23.0M | 0.07% | +130,813 | New |
| Federated Hermes, Inc. | 131,168 | $23.1M | 0.04% | +6,246+5.0% | Added |