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, Q1 2026
Institutional positions in Biogen Inc. as of Mar 31, 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
- 1,015
- +33 vs. Q4 2025
- Shares held
- 135.0M
- +15.4M (+12.9%) vs. Q4 2025
- Total value
- $24.7B
- +$3.70B (+17.6%) vs. Q4 2025
- New holders
- 138
- 402 more added
- Sold out
- 105
- 290 more reduced
20 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State Board of Administration of Florida Retirement System | 124,212 | $22.8M | 0.04% | −1,538−1.2% | Reduced |
| Great West Life Assurance Co | 121,723 | $22.4M | 0.04% | +18,623+18.1% | Added |
| Portolan Capital Management, LLC | 118,481 | $21.7M | 1.16% | +33,491+39.4% | Added |
| Creative Planning | 117,236 | $21.5M | 0.01% | +27,234+30.3% | Added |
| Quantinno Capital Management LP | 116,374 | $21.3M | 0.04% | +18,041+18.3% | Added |
| LMR Partners LLP | 116,131 | $21.3M | 0.20% | +107,501+1,245.7% | Added |
| Canada Pension Plan Investment Board | 114,938 | $21.1M | 0.01% | −23,140−16.8% | Reduced |
| DekaBank Deutsche Girozentrale | 108,721 | $20.7M | 0.03% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 111,830 | $20.5M | 0.30% | +5,716+5.4% | Added |
| New York State Teachers Retirement System | 111,303 | $20.4M | 0.04% | +100+0.1% | Added |
| Rhenman & Partners Asset Management AB | 109,100 | $20.0M | 2.47% | +16,750+18.1% | Added |
| Woodline Partners LP | 109,032 | $20.0M | 0.08% | +6,714+6.6% | Added |
| American Century Companies Inc | 104,783 | $19.2M | 0.01% | +18,959+22.1% | Added |
| Adams Diversified Equity Fund, Inc. | 100,300 | $18.4M | 0.65% | +56,000+126.4% | Added |
| New York State Common Retirement Fund | 99,845 | $18.3M | 0.03% | +600+0.6% | Added |
| Walleye Trading LLC | 99,532 | $18.2M | 0.38% | +4,010+4.2% | Added |
| Federated Hermes, Inc. | 97,279 | $17.8M | 0.03% | −33,889−25.8% | Reduced |
| Aviva PLC | 96,864 | $17.8M | 0.03% | −28,034−22.4% | Reduced |
| Raymond James Financial Inc | 96,699 | $17.7M | 0.01% | +12,985+15.5% | Added |
| Defilade Capital Management, L.P. | 96,289 | $17.7M | 2.48% | −65,703−40.6% | Reduced |
| Manufacturers Life Insurance Company, The | 95,108 | $17.4M | 0.01% | −10,628−10.1% | Reduced |
| Millennium Management LLC | 93,964 | $17.2M | 0.01% | −1,031,622−91.7% | Reduced |
| Bank of Montreal | 92,709 | $17.0M | 0.01% | −20,975−18.5% | Reduced |
| Sphera Funds Management Ltd. | 92,526 | $17.0M | 2.92% | −2,212−2.3% | Reduced |
| Sector Gamma AS | 90,096 | $16.5M | 3.90% | +4,621+5.4% | Added |
| Illinois Municipal Retirement Fund | 89,303 | $16.4M | 0.21% | +7,905+9.7% | Added |
| Handelsbanken Fonder AB | 82,726 | $15.2M | 0.05% | −1,502−1.8% | Reduced |
| LPL Financial LLC | 81,720 | $15.0M | 0.00% | −7,817−8.7% | Reduced |
| National Bank of Canada | 78,880 | $14.5M | 0.01% | −17,662−18.3% | Reduced |
| State of Wisconsin Investment Board | 78,564 | $14.4M | 0.03% | +2,620+3.4% | Added |
| Cerity Partners LLC | 76,644 | $14.1M | 0.02% | +8,278+12.1% | Added |
| Treasurer of the State of North Carolina | 75,179 | $13.8M | 0.04% | +2,565+3.5% | Added |
| Korea Investment CORP | 73,988 | $13.6M | 0.03% | +20,081+37.3% | Added |
| Vanguard Investments Australia, Ltd. | 73,268 | $13.4M | 0.04% | +73,268 | New |
| APG Asset Management N.V. | 84,047 | $13.4M | 0.04% | −11,025−11.6% | Reduced |
| Chevy Chase Trust Holdings, Inc. | 72,645 | $13.3M | 0.04% | −2,079−2.8% | Reduced |
| Mariner, LLC | 72,036 | $13.2M | 0.02% | +19,561+37.3% | Added |
| SEI Investments Co | 71,513 | $13.1M | 0.01% | +12,017+20.2% | Added |
| Mackenzie Financial Corp | 71,432 | $13.1M | 0.02% | +357+0.5% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 68,243 | $12.6M | 0.02% | −55,493−44.8% | Reduced |
| Cresset Asset Management, LLC | 67,503 | $12.4M | 0.05% | −8,876−11.6% | Reduced |
| Banque Pictet & Cie SA | 66,061 | $12.1M | 0.14% | −5,297−7.4% | Reduced |
| Mitsubishi UFJ Trust & Banking Corp | 65,094 | $11.9M | 0.03% | −224−0.3% | Reduced |
| Envestnet Asset Management Inc | 64,693 | $11.9M | 0.00% | +5,874+10.0% | Added |
| Royal London Asset Management Ltd | 64,266 | $11.8M | 0.02% | −299−0.5% | Reduced |
| Asset Management One Co.,Ltd. | 64,100 | $11.8M | 0.03% | −3,353−5.0% | Reduced |
| Nomura Asset Management Co Ltd | 62,978 | $11.5M | 0.03% | −4,373−6.5% | Reduced |
| OrbiMed Advisors LLC | 61,600 | $11.3M | 0.26% | +61,600 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 60,776 | $11.1M | 0.02% | +2,940+5.1% | Added |
| Integral Health Asset Management, LLC | 60,000 | $11.0M | 0.58% | −40,000−40.0% | Reduced |
| Toroso Investments, LLC | 58,586 | $10.9M | 0.03% | +28,108+92.2% | Added |
| Schroder Investment Management Group | 58,828 | $10.8M | 0.01% | +1,556+2.7% | Added |
| Glenview Capital Management, LLC | 57,019 | $10.5M | 0.28% | −233,586−80.4% | Reduced |
| Edmond de Rothschild Holding S.A. | 56,970 | $10.4M | 0.15% | −10,000−14.9% | Reduced |
| CWM, LLC | 55,175 | $10.1M | 0.03% | +6,285+12.9% | Added |
| Voya Investment Management LLC | 54,561 | $10.0M | 0.01% | −8,134−13.0% | Reduced |
| Erste Asset Management GmbH | 53,142 | $9.97M | 0.09% | +4,408+9.0% | Added |
| Andra AP-fonden | 52,000 | $9.53M | 0.12% | +49,500+1,980.0% | Added |
| Silverarc Capital Management, LLC | 50,967 | $9.34M | 1.10% | −24,445−32.4% | Reduced |
| Gateway Investment Advisers LLC | 50,923 | $9.34M | 0.10% | +2,762+5.7% | Added |
| State of New Jersey Common Pension Fund D | 50,137 | $9.19M | 0.04% | +1,192+2.4% | Added |
| HighTower Advisors, LLC | 49,851 | $9.14M | 0.01% | +37,892+316.8% | Added |
| Schonfeld Strategic Advisors LLC | 48,828 | $8.95M | 0.07% | −58,240−54.4% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 47,807 | $8.76M | 0.05% | −918−1.9% | Reduced |
| Danske Bank A/S | 47,417 | $8.69M | 0.02% | −998−2.1% | Reduced |
| Nomura Asset Management International Inc. | 47,333 | $8.68M | 0.01% | +993+2.1% | Added |
| Ethic Inc. | 47,293 | $8.67M | 0.14% | −1,298−2.7% | Reduced |
| Resona Asset Management Co.,Ltd. | 46,261 | $8.52M | 0.04% | +1,075+2.4% | Added |
| Tredje AP-fonden | 46,370 | $8.50M | 0.05% | +46,370 | New |
| Public Employees Retirement System of Ohio | 46,062 | $8.44M | 0.03% | −1,308−2.8% | Reduced |
| Dakota Wealth Management | 45,587 | $8.36M | 0.18% | −310−0.7% | Reduced |
| Contravisory Investment Management, Inc. | 44,677 | $8.19M | 1.68% | +44,677 | New |
| Privium Fund Management B.V. | 43,800 | $8.03M | 1.67% | −29,680−40.4% | Reduced |
| Generali Investments CEE, investicni spolecnost, a.s. | 43,552 | $7.98M | 0.42% | 00.0% | Unchanged |
| Toronto Dominion Bank | 43,371 | $7.95M | 0.02% | −5,802−11.8% | Reduced |
| State of Michigan Retirement System | 43,003 | $7.88M | 0.04% | −100−0.2% | Reduced |
| Banco Bilbao Vizcaya Argentaria, S.A. | 42,471 | $7.77M | 0.05% | −104,480−71.1% | Reduced |
| CIBC Bancorp USA Inc. | 41,902 | $7.68M | 0.01% | +41,902 | New |
| SEB Asset Management AB | 41,869 | $7.68M | 0.03% | +41,869 | New |
| Natixis Advisors, L.P. | 41,272 | $7.57M | 0.01% | +7,936+23.8% | Added |
| Ossiam | 40,960 | $7.51M | 0.13% | −21,303−34.2% | Reduced |
| Stifel Financial Corp | 40,938 | $7.51M | 0.01% | −10,308−20.1% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 40,238 | $7.38M | 0.02% | +5,131+14.6% | Added |
| Czech National Bank | 39,969 | $7.33M | 0.05% | +1,286+3.3% | Added |
| Arizona State Retirement System | 39,863 | $7.31M | 0.04% | −357−0.9% | Reduced |
| Orion Investment Co | 39,610 | $7.26M | 2.31% | +206+0.5% | Added |
| The PNC Financial Services Group, Inc. | 39,484 | $7.24M | 0.00% | +766+2.0% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 39,303 | $7.21M | 0.04% | +12,750+48.0% | Added |
| State of Tennessee, Treasury Department | 39,265 | $7.20M | 0.02% | −32,202−45.1% | Reduced |
| Mercer Global Advisors Inc | 38,600 | $7.08M | 0.01% | −3,875−9.1% | Reduced |
| IFM Investors Pty Ltd | 38,521 | $7.06M | 0.06% | −1,334−3.3% | Reduced |
| Oversea-Chinese Banking CORP Ltd | 37,465 | $6.87M | 0.20% | +3,099+9.0% | Added |
| USS Investment Management Ltd | 37,217 | $6.82M | 0.03% | +3,001+8.8% | Added |
| CI Private Wealth, LLC | 36,952 | $6.75M | 0.01% | −4,197−10.2% | Reduced |
| Martingale Asset Management L P | 36,735 | $6.73M | 0.17% | +36,735 | New |
| JustInvest LLC | 36,413 | $6.68M | 0.07% | −2,180−5.6% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 62,530 | $6.65M | 0.01% | +24,582+64.8% | Added |
| Squarepoint Ops LLC | 36,053 | $6.61M | 0.01% | −110,355−75.4% | Reduced |
| ProShare Advisors LLC | 35,926 | $6.59M | 0.01% | −5,570−13.4% | Reduced |
| Nisa Investment Advisors, LLC | 35,820 | $6.57M | 0.02% | −2,615−6.8% | Reduced |