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, 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
- 1,014
- +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
- 401 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 | 1,046 | $30.7B |
| Q1 2026 | 1,014 | $24.7B |
| Q4 2025 | 1,001 | $24.6B |
| Q3 2025 | 908 | $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 |
|---|---|---|---|---|---|
| Ensign Peak Advisors, Inc | 33,710 | $6.18M | 0.01% | +23,034+215.8% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,186 | $6.27M | 0.03% | +62+0.2% | Added |
| Generali Asset Management SPA SGR | 34,194 | $6.27M | 0.13% | +7,013+25.8% | Added |
| MetLife Investment Management | 34,279 | $6.28M | 0.03% | −876−2.5% | Reduced |
| Grimes & Company, Inc. | 34,684 | $6.36M | 0.18% | +840+2.5% | Added |
| CWA Asset Management Group, LLC | 34,830 | $6.39M | 0.22% | +2,296+7.1% | Added |
| North Growth Management Ltd. | 35,000 | $6.39M | 0.98% | +1,000+2.9% | Added |
| Ritholtz Wealth Management | 34,943 | $6.41M | 0.11% | +6,568+23.1% | Added |
| Tang Capital Management LLC | 35,000 | $6.42M | 0.33% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 35,018 | $6.42M | 0.03% | −13,541−27.9% | Reduced |
| CIBC Asset Management Inc | 35,196 | $6.45M | 0.02% | +749+2.2% | Added |
| Walleye Capital LLC | 35,339 | $6.48M | 0.04% | +33,764+2,143.7% | Added |
| Los Angeles Capital Management LLC | 35,358 | $6.48M | 0.03% | −169,782−82.8% | Reduced |
| Calamos Advisors LLC | 35,527 | $6.51M | 0.03% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 35,820 | $6.57M | 0.02% | −2,615−6.8% | Reduced |
| ProShare Advisors LLC | 35,926 | $6.59M | 0.01% | −5,570−13.4% | Reduced |
| Squarepoint Ops LLC | 36,053 | $6.61M | 0.01% | −110,355−75.4% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 62,530 | $6.65M | 0.01% | +24,582+64.8% | Added |
| JustInvest LLC | 36,413 | $6.68M | 0.07% | −2,180−5.6% | Reduced |
| Martingale Asset Management L P | 36,735 | $6.73M | 0.17% | +36,735 | New |
| CI Private Wealth, LLC | 36,952 | $6.75M | 0.01% | −4,197−10.2% | Reduced |
| USS Investment Management Ltd | 37,217 | $6.82M | 0.03% | +3,001+8.8% | Added |
| Oversea-Chinese Banking CORP Ltd | 37,465 | $6.87M | 0.20% | +3,099+9.0% | Added |
| IFM Investors Pty Ltd | 38,521 | $7.06M | 0.06% | −1,334−3.3% | Reduced |
| Mercer Global Advisors Inc | 38,600 | $7.08M | 0.01% | −3,875−9.1% | Reduced |
| State of Tennessee, Treasury Department | 39,265 | $7.20M | 0.02% | −32,202−45.1% | Reduced |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 39,303 | $7.21M | 0.04% | +12,750+48.0% | Added |
| The PNC Financial Services Group, Inc. | 39,484 | $7.24M | 0.00% | +766+2.0% | Added |
| Orion Investment Co | 39,610 | $7.26M | 2.31% | +206+0.5% | Added |
| Arizona State Retirement System | 39,863 | $7.31M | 0.04% | −357−0.9% | Reduced |
| Czech National Bank | 39,969 | $7.33M | 0.05% | +1,286+3.3% | Added |
| Mirae Asset Global Investments Co., Ltd. | 40,238 | $7.38M | 0.02% | +5,131+14.6% | Added |
| Stifel Financial Corp | 40,938 | $7.51M | 0.01% | −10,308−20.1% | Reduced |
| Ossiam | 40,960 | $7.51M | 0.13% | −21,303−34.2% | Reduced |
| Natixis Advisors, L.P. | 41,272 | $7.57M | 0.01% | +7,936+23.8% | Added |
| SEB Asset Management AB | 41,869 | $7.68M | 0.03% | +41,869 | New |
| CIBC Bancorp USA Inc. | 41,902 | $7.68M | 0.01% | +41,902 | New |
| Banco Bilbao Vizcaya Argentaria, S.A. | 42,471 | $7.77M | 0.05% | −104,480−71.1% | Reduced |
| State of Michigan Retirement System | 43,003 | $7.88M | 0.04% | −100−0.2% | Reduced |
| Toronto Dominion Bank | 43,371 | $7.95M | 0.02% | −5,802−11.8% | Reduced |
| Generali Investments CEE, investicni spolecnost, a.s. | 43,552 | $7.98M | 0.42% | 00.0% | Unchanged |
| Privium Fund Management B.V. | 43,800 | $8.03M | 1.67% | −29,680−40.4% | Reduced |
| Contravisory Investment Management, Inc. | 44,677 | $8.19M | 1.68% | +44,677 | New |
| Dakota Wealth Management | 45,587 | $8.36M | 0.18% | −310−0.7% | Reduced |
| Public Employees Retirement System of Ohio | 46,062 | $8.44M | 0.03% | −1,308−2.8% | Reduced |
| Tredje AP-fonden | 46,370 | $8.50M | 0.05% | +46,370 | New |
| Resona Asset Management Co.,Ltd. | 46,261 | $8.52M | 0.04% | +1,075+2.4% | Added |
| Ethic Inc. | 47,293 | $8.67M | 0.14% | −1,298−2.7% | Reduced |
| Nomura Asset Management International Inc. | 47,333 | $8.68M | 0.01% | +993+2.1% | Added |
| Danske Bank A/S | 47,417 | $8.69M | 0.02% | −998−2.1% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 47,807 | $8.76M | 0.05% | −918−1.9% | Reduced |
| Schonfeld Strategic Advisors LLC | 48,828 | $8.95M | 0.07% | −58,240−54.4% | Reduced |
| HighTower Advisors, LLC | 49,851 | $9.14M | 0.01% | +37,892+316.8% | Added |
| State of New Jersey Common Pension Fund D | 50,137 | $9.19M | 0.04% | +1,192+2.4% | Added |
| Gateway Investment Advisers LLC | 50,923 | $9.34M | 0.10% | +2,762+5.7% | Added |
| Silverarc Capital Management, LLC | 50,967 | $9.34M | 1.10% | −24,445−32.4% | Reduced |
| Andra AP-fonden | 52,000 | $9.53M | 0.12% | +49,500+1,980.0% | Added |
| Erste Asset Management GmbH | 53,142 | $9.97M | 0.09% | +4,408+9.0% | Added |
| Voya Investment Management LLC | 54,561 | $10.0M | 0.01% | −8,134−13.0% | Reduced |
| CWM, LLC | 55,175 | $10.1M | 0.03% | +6,285+12.9% | Added |
| Edmond de Rothschild Holding S.A. | 56,970 | $10.4M | 0.15% | −10,000−14.9% | Reduced |
| Glenview Capital Management, LLC | 57,019 | $10.5M | 0.28% | −233,586−80.4% | Reduced |
| Schroder Investment Management Group | 58,828 | $10.8M | 0.01% | +1,556+2.7% | Added |
| Toroso Investments, LLC | 58,586 | $10.9M | 0.03% | +28,108+92.2% | Added |
| Integral Health Asset Management, LLC | 60,000 | $11.0M | 0.58% | −40,000−40.0% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 60,776 | $11.1M | 0.02% | +2,940+5.1% | Added |
| OrbiMed Advisors LLC | 61,600 | $11.3M | 0.26% | +61,600 | New |
| Nomura Asset Management Co Ltd | 62,978 | $11.5M | 0.03% | −4,373−6.5% | Reduced |
| Asset Management One Co.,Ltd. | 64,100 | $11.8M | 0.03% | −3,353−5.0% | Reduced |
| Royal London Asset Management Ltd | 64,266 | $11.8M | 0.02% | −299−0.5% | Reduced |
| Envestnet Asset Management Inc | 64,693 | $11.9M | 0.00% | +5,874+10.0% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 65,094 | $11.9M | 0.03% | −224−0.3% | Reduced |
| Banque Pictet & Cie SA | 66,061 | $12.1M | 0.14% | −5,297−7.4% | Reduced |
| Cresset Asset Management, LLC | 67,503 | $12.4M | 0.05% | −8,876−11.6% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 68,243 | $12.6M | 0.02% | −55,493−44.8% | Reduced |
| Mackenzie Financial Corp | 71,432 | $13.1M | 0.02% | +357+0.5% | Added |
| SEI Investments Co | 71,513 | $13.1M | 0.01% | +12,017+20.2% | Added |
| Mariner, LLC | 72,036 | $13.2M | 0.02% | +19,561+37.3% | Added |
| Chevy Chase Trust Holdings, Inc. | 72,645 | $13.3M | 0.04% | −2,079−2.8% | Reduced |
| APG Asset Management N.V. | 84,047 | $13.4M | 0.04% | −11,025−11.6% | Reduced |
| Vanguard Investments Australia, Ltd. | 73,268 | $13.4M | 0.04% | +73,268 | New |
| Korea Investment CORP | 73,988 | $13.6M | 0.03% | +20,081+37.3% | Added |
| Treasurer of the State of North Carolina | 75,179 | $13.8M | 0.04% | +2,565+3.5% | Added |
| Cerity Partners LLC | 76,644 | $14.1M | 0.02% | +8,278+12.1% | Added |
| State of Wisconsin Investment Board | 78,564 | $14.4M | 0.03% | +2,620+3.4% | Added |
| National Bank of Canada | 78,880 | $14.5M | 0.01% | −17,662−18.3% | Reduced |
| LPL Financial LLC | 81,720 | $15.0M | 0.00% | −7,817−8.7% | Reduced |
| Handelsbanken Fonder AB | 82,726 | $15.2M | 0.05% | −1,502−1.8% | Reduced |
| Illinois Municipal Retirement Fund | 89,303 | $16.4M | 0.21% | +7,905+9.7% | Added |
| Sector Gamma AS | 90,096 | $16.5M | 3.90% | +4,621+5.4% | Added |
| Sphera Funds Management Ltd. | 92,526 | $17.0M | 2.92% | −2,212−2.3% | Reduced |
| Bank of Montreal | 92,709 | $17.0M | 0.01% | −20,975−18.5% | Reduced |
| Millennium Management LLC | 93,964 | $17.2M | 0.01% | −1,031,622−91.7% | Reduced |
| Manufacturers Life Insurance Company, The | 95,108 | $17.4M | 0.01% | −10,628−10.1% | Reduced |
| Defilade Capital Management, L.P. | 96,289 | $17.7M | 2.48% | −65,703−40.6% | Reduced |
| Raymond James Financial Inc | 96,699 | $17.7M | 0.01% | +12,985+15.5% | Added |
| Aviva PLC | 96,864 | $17.8M | 0.03% | −28,034−22.4% | Reduced |
| Federated Hermes, Inc. | 97,279 | $17.8M | 0.03% | −33,889−25.8% | Reduced |
| Walleye Trading LLC | 99,532 | $18.2M | 0.38% | +4,010+4.2% | Added |
| New York State Common Retirement Fund | 99,845 | $18.3M | 0.03% | +600+0.6% | Added |