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 |
|---|---|---|---|---|---|
| Calamos Advisors LLC | 35,527 | $6.51M | 0.03% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 35,358 | $6.48M | 0.03% | −169,782−82.8% | Reduced |
| Walleye Capital LLC | 35,339 | $6.48M | 0.04% | +33,764+2,143.7% | Added |
| CIBC Asset Management Inc | 35,196 | $6.45M | 0.02% | +749+2.2% | Added |
| Rafferty Asset Management, LLC | 35,018 | $6.42M | 0.03% | −13,541−27.9% | Reduced |
| Tang Capital Management LLC | 35,000 | $6.42M | 0.33% | 00.0% | Unchanged |
| Ritholtz Wealth Management | 34,943 | $6.41M | 0.11% | +6,568+23.1% | Added |
| North Growth Management Ltd. | 35,000 | $6.39M | 0.98% | +1,000+2.9% | Added |
| CWA Asset Management Group, LLC | 34,830 | $6.39M | 0.22% | +2,296+7.1% | Added |
| Grimes & Company, Inc. | 34,684 | $6.36M | 0.18% | +840+2.5% | Added |
| MetLife Investment Management | 34,279 | $6.28M | 0.03% | −876−2.5% | Reduced |
| Generali Asset Management SPA SGR | 34,194 | $6.27M | 0.13% | +7,013+25.8% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,186 | $6.27M | 0.03% | +62+0.2% | Added |
| Ensign Peak Advisors, Inc | 33,710 | $6.18M | 0.01% | +23,034+215.8% | Added |
| Farmers Trust Co | 33,610 | $6.16M | 0.97% | +425+1.3% | Added |
| Nippon Life Global Investors Americas, Inc. | 33,570 | $6.15M | 0.28% | +7,080+26.7% | Added |
| Leuthold Group, LLC | 33,143 | $6.08M | 0.65% | +554+1.7% | Added |
| QRG Capital Management, Inc. | 33,002 | $6.05M | 0.06% | +29,207+769.6% | Added |
| Fifth Third Bancorp | 32,716 | $6.00M | 0.01% | +23,504+255.1% | Added |
| Lighthouse Investment Partners, LLC | 32,632 | $5.98M | 0.22% | +26,844+463.8% | Added |
| Swiss Life Asset Management Ltd | 31,288 | $5.74M | 0.03% | +6,092+24.2% | Added |
| US Bancorp | 31,223 | $5.72M | 0.01% | +4,466+16.7% | Added |
| DnB Asset Management AS | 31,221 | $5.72M | 0.02% | +2,492+8.7% | Added |
| Retirement Systems of Alabama | 31,166 | $5.71M | 0.02% | −44−0.1% | Reduced |
| Baader Bank INC | 30,801 | $5.64M | 0.56% | −1,690−5.2% | Reduced |
| Nissay Asset Management Corp | 29,762 | $5.46M | 0.03% | +3,476+13.2% | Added |
| Amalgamated Bank | 29,762 | $5.46M | 0.04% | −523−1.7% | Reduced |
| Kentucky Retirement Systems | 19,502 | $5.46M | 0.41% | +10,331+112.6% | Added |
| B. Metzler seel. Sohn & Co. AG | 29,725 | $5.45M | 0.05% | −246−0.8% | Reduced |
| Hillman Capital Management, Inc. | 29,540 | $5.42M | 3.76% | −976−3.2% | Reduced |
| Insight Wealth Strategies, LLC | 29,346 | $5.38M | 0.60% | +386+1.3% | Added |
| Impax Asset Management Group plc | 28,728 | $5.27M | 0.04% | −3,396−10.6% | Reduced |
| PEAK6 LLC | 28,166 | $5.16M | 0.15% | +28,166 | New |
| Daiwa Securities Group Inc. | 27,136 | $4.97M | 0.01% | +859+3.3% | Added |
| Xponance, Inc. | 26,456 | $4.85M | 0.03% | +3,418+14.8% | Added |
| Leonteq Securities AG | 26,454 | $4.85M | 0.29% | −1,506−5.4% | Reduced |
| Guggenheim Capital LLC | 26,382 | $4.84M | 0.04% | +2,362+9.8% | Added |
| China Universal Asset Management Co., Ltd. | 26,044 | $4.77M | 0.36% | +2,139+8.9% | Added |
| CAPROCK Group, Inc. | 25,651 | $4.70M | 0.11% | +2,198+9.4% | Added |
| Atom Investors LP | 24,749 | $4.54M | 0.32% | +3,029+13.9% | Added |
| Jones Financial Companies LLLP | 24,554 | $4.51M | 0.00% | +11,729+91.5% | Added |
| Old North State Wealth Management, LLC | 24,595 | $4.51M | 2.09% | +786+3.3% | Added |
| NorthCrest Asset Manangement, LLC | 25,012 | $4.44M | 0.14% | −8,775−26.0% | Reduced |
| Munich Reinsurance Co Stock Corp in Munich | 23,942 | $4.39M | 0.11% | +23,942 | New |
| Public Sector Pension Investment Board | 23,792 | $4.36M | 0.01% | +4,602+24.0% | Added |
| Utah Retirement Systems | 23,714 | $4.35M | 0.04% | −282−1.2% | Reduced |
| Mn Services Vermogensbeheer B.V. | 23,300 | $4.27M | 0.03% | 00.0% | Unchanged |
| Credit Agricole S A | 22,985 | $4.21M | 0.01% | −53,790−70.1% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 22,926 | $4.20M | 0.00% | −1,993−8.0% | Reduced |
| Leo Wealth, LLC | 22,737 | $4.17M | 0.30% | +4,604+25.4% | Added |
| Natixis | 22,585 | $4.14M | 0.02% | −6,519−22.4% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 22,477 | $4.12M | 0.04% | +106+0.5% | Added |
| Cetera Investment Advisers | 22,444 | $4.11M | 0.00% | −1,059−4.5% | Reduced |
| Rakuten Investment Management, Inc. | 21,778 | $4.08M | 0.01% | +2,483+12.9% | Added |
| New York Life Investment Management LLC | 21,905 | $4.02M | 0.03% | +595+2.8% | Added |
| Jefferies Financial Group Inc. | 21,902 | $4.02M | 0.05% | −10,611−32.6% | Reduced |
| Empowered Funds, LLC | 21,775 | $3.99M | 0.03% | −36,186−62.4% | Reduced |
| SummitTX Capital, L.P. | 21,656 | $3.97M | 0.13% | +21,656 | New |
| Teacher Retirement System of Texas | 21,299 | $3.90M | 0.02% | −2,190−9.3% | Reduced |
| Colony Group, LLC | 20,982 | $3.85M | 0.00% | +6,401+43.9% | Added |
| Meitav Dash Investments Ltd | 20,972 | $3.84M | 0.04% | −12,490−37.3% | Reduced |
| Kovitz Investment Group Partners, LLC | 20,940 | $3.84M | 0.09% | −193−0.9% | Reduced |
| NEOS Investment Management LLC | 20,840 | $3.82M | 0.02% | +4,306+26.0% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 20,489 | $3.76M | 0.03% | +67+0.3% | Added |
| Bank of Nova Scotia | 20,436 | $3.75M | 0.01% | −2,259−10.0% | Reduced |
| British Columbia Investment Management Corp | 20,217 | $3.71M | 0.02% | −5,743−22.1% | Reduced |
| Omers Administration Corp | 20,149 | $3.69M | 0.02% | +3,341+19.9% | Added |
| Krensavage Asset Management, LLC | 20,000 | $3.67M | 1.43% | +10,000+100.0% | Added |
| Canal Insurance CO | 20,000 | $3.67M | 0.79% | +20,000 | New |
| Inspire Trust Co, N.A. | 20,000 | $3.67M | 0.57% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 19,581 | $3.59M | 0.01% | +7,233+58.6% | Added |
| Captrust Financial Advisors | 19,577 | $3.59M | 0.01% | +2,202+12.7% | Added |
| Cinctive Capital Management LP | 19,349 | $3.55M | 0.23% | −32,824−62.9% | Reduced |
| Morningstar Investment Management LLC | 19,344 | $3.55M | 0.22% | +565+3.0% | Added |
| Janus Henderson Group PLC | 18,975 | $3.48M | 0.00% | −1,277−6.3% | Reduced |
| Artia Global Partners LP | 18,437 | $3.38M | 0.76% | +18,437 | New |
| Commonwealth Equity Services, LLC | 18,102 | $3.32M | 0.00% | −292−1.6% | Reduced |
| Kinneret Advisory, LLC | 17,946 | $3.29M | 0.31% | −796−4.2% | Reduced |
| Elo Mutual Pension Insurance Co | 17,727 | $3.25M | 0.05% | +585+3.4% | Added |
| MH & Associates Securities Management Corp | 17,717 | $3.25M | 2.83% | +119+0.7% | Added |
| Fieldview Capital Management, LLC | 17,659 | $3.24M | 0.95% | +3,387+23.7% | Added |
| Allstate Corp | 17,555 | $3.22M | 0.03% | +7,883+81.5% | Added |
| State of Alaska, Department of Revenue | 17,507 | $3.21M | 0.03% | +320+1.9% | Added |
| Ilmarinen Mutual Pension Insurance Co | 17,400 | $3.19M | 0.03% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 16,935 | $3.10M | 0.01% | −29,188−63.3% | Reduced |
| Oregon Public Employees Retirement Fund | 16,841 | $3.09M | 0.04% | +100+0.6% | Added |
| Nomura Holdings Inc | 16,730 | $3.07M | 0.03% | −130,531−88.6% | Reduced |
| M&T Bank Corp | 16,224 | $2.97M | 0.01% | −537−3.2% | Reduced |
| Systematic Financial Management LP | 16,220 | $2.97M | 0.07% | −420−2.5% | Reduced |
| Nordea Investment Management AB | 16,586 | $2.96M | 0.00% | +2,564+18.3% | Added |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 15,973 | $2.93M | 0.10% | −2,900−15.4% | Reduced |
| Dark Forest Capital Management LP | 15,736 | $2.88M | 0.26% | +15,736 | New |
| Wealthfront Advisers LLC | 15,679 | $2.87M | 0.01% | +128+0.8% | Added |
| Mutual of America Capital Management LLC | 15,656 | $2.87M | 0.03% | −137−0.9% | Reduced |
| UniSuper Management Pty Ltd | 15,572 | $2.85M | 0.02% | −855−5.2% | Reduced |
| Clark Estates Inc | 15,300 | $2.80M | 0.67% | 00.0% | Unchanged |
| OP Asset Management Ltd | 15,263 | $2.80M | 0.03% | −983−6.1% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 15,239 | $2.79M | 0.01% | +340+2.3% | Added |
| Yousif Capital Management, LLC | 15,206 | $2.79M | 0.03% | −714−4.5% | Reduced |
| Sivik Global Healthcare LLC | 15,000 | $2.75M | 2.09% | −5,000−25.0% | Reduced |