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 |
|---|---|---|---|---|---|
| Advisor Group Holdings, Inc. | 12,005 | $2.20M | 0.00% | −2,442−16.9% | Reduced |
| Beacon Investment Advisory Services, Inc. | 12,314 | $2.26M | 0.09% | −360−2.8% | Reduced |
| Triglav Skladi, D.O.O. | 12,428 | $2.28M | 0.16% | +298+2.5% | Added |
| Blair William & Co | 12,854 | $2.36M | 0.01% | +4,411+52.2% | Added |
| GWM Advisors LLC | 13,031 | $2.39M | 0.01% | −8,017−38.1% | Reduced |
| Convergence Investment Partners, LLC | 13,557 | $2.49M | 0.41% | +1,401+11.5% | Added |
| Vontobel Holding Ltd. | 13,710 | $2.51M | 0.01% | +3,869+39.3% | Added |
| Evoke Wealth, LLC | 13,831 | $2.54M | 0.05% | +288+2.1% | Added |
| Gabelli Funds LLC | 14,100 | $2.58M | 0.02% | −1,300−8.4% | Reduced |
| Horizon Investments, LLC | 14,244 | $2.61M | 0.03% | −3,138−18.1% | Reduced |
| Boothbay Fund Management, LLC | 14,268 | $2.62M | 0.06% | +14,268 | New |
| Avanza Fonder AB | 14,621 | $2.68M | 0.07% | −122−0.8% | Reduced |
| Pathstone Holdings, LLC | 14,908 | $2.73M | 0.01% | +1,100+8.0% | Added |
| Dymon Asia Capital (Singapore) Pte. Ltd. | 15,000 | $2.75M | 0.60% | +15,000 | New |
| Sivik Global Healthcare LLC | 15,000 | $2.75M | 2.09% | −5,000−25.0% | Reduced |
| Yousif Capital Management, LLC | 15,206 | $2.79M | 0.03% | −714−4.5% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 15,239 | $2.79M | 0.01% | +340+2.3% | Added |
| OP Asset Management Ltd | 15,263 | $2.80M | 0.03% | −983−6.1% | Reduced |
| Clark Estates Inc | 15,300 | $2.80M | 0.67% | 00.0% | Unchanged |
| UniSuper Management Pty Ltd | 15,572 | $2.85M | 0.02% | −855−5.2% | Reduced |
| Mutual of America Capital Management LLC | 15,656 | $2.87M | 0.03% | −137−0.9% | Reduced |
| Wealthfront Advisers LLC | 15,679 | $2.87M | 0.01% | +128+0.8% | Added |
| Dark Forest Capital Management LP | 15,736 | $2.88M | 0.26% | +15,736 | New |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 15,973 | $2.93M | 0.10% | −2,900−15.4% | Reduced |
| Nordea Investment Management AB | 16,586 | $2.96M | 0.00% | +2,564+18.3% | Added |
| Systematic Financial Management LP | 16,220 | $2.97M | 0.07% | −420−2.5% | Reduced |
| M&T Bank Corp | 16,224 | $2.97M | 0.01% | −537−3.2% | Reduced |
| Nomura Holdings Inc | 16,730 | $3.07M | 0.03% | −130,531−88.6% | Reduced |
| Oregon Public Employees Retirement Fund | 16,841 | $3.09M | 0.04% | +100+0.6% | Added |
| Lazard Asset Management LLC | 16,935 | $3.10M | 0.01% | −29,188−63.3% | Reduced |
| Ilmarinen Mutual Pension Insurance Co | 17,400 | $3.19M | 0.03% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 17,507 | $3.21M | 0.03% | +320+1.9% | Added |
| Allstate Corp | 17,555 | $3.22M | 0.03% | +7,883+81.5% | Added |
| Fieldview Capital Management, LLC | 17,659 | $3.24M | 0.95% | +3,387+23.7% | Added |
| MH & Associates Securities Management Corp | 17,717 | $3.25M | 2.83% | +119+0.7% | Added |
| Elo Mutual Pension Insurance Co | 17,727 | $3.25M | 0.05% | +585+3.4% | Added |
| Kinneret Advisory, LLC | 17,946 | $3.29M | 0.31% | −796−4.2% | Reduced |
| Commonwealth Equity Services, LLC | 18,102 | $3.32M | 0.00% | −292−1.6% | Reduced |
| Artia Global Partners LP | 18,437 | $3.38M | 0.76% | +18,437 | New |
| Janus Henderson Group PLC | 18,975 | $3.48M | 0.00% | −1,277−6.3% | Reduced |
| Morningstar Investment Management LLC | 19,344 | $3.55M | 0.22% | +565+3.0% | Added |
| Cinctive Capital Management LP | 19,349 | $3.55M | 0.23% | −32,824−62.9% | Reduced |
| Captrust Financial Advisors | 19,577 | $3.59M | 0.01% | +2,202+12.7% | Added |
| Federation des caisses Desjardins du Quebec | 19,581 | $3.59M | 0.01% | +7,233+58.6% | Added |
| Inspire Trust Co, N.A. | 20,000 | $3.67M | 0.57% | 00.0% | Unchanged |
| 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 |
| Omers Administration Corp | 20,149 | $3.69M | 0.02% | +3,341+19.9% | Added |
| British Columbia Investment Management Corp | 20,217 | $3.71M | 0.02% | −5,743−22.1% | Reduced |
| Bank of Nova Scotia | 20,436 | $3.75M | 0.01% | −2,259−10.0% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 20,489 | $3.76M | 0.03% | +67+0.3% | Added |
| NEOS Investment Management LLC | 20,840 | $3.82M | 0.02% | +4,306+26.0% | Added |
| Kovitz Investment Group Partners, LLC | 20,940 | $3.84M | 0.09% | −193−0.9% | Reduced |
| Meitav Dash Investments Ltd | 20,972 | $3.84M | 0.04% | −12,490−37.3% | Reduced |
| Colony Group, LLC | 20,982 | $3.85M | 0.00% | +6,401+43.9% | Added |
| Teacher Retirement System of Texas | 21,299 | $3.90M | 0.02% | −2,190−9.3% | Reduced |
| SummitTX Capital, L.P. | 21,656 | $3.97M | 0.13% | +21,656 | New |
| Empowered Funds, LLC | 21,775 | $3.99M | 0.03% | −36,186−62.4% | Reduced |
| Jefferies Financial Group Inc. | 21,902 | $4.02M | 0.05% | −10,611−32.6% | Reduced |
| New York Life Investment Management LLC | 21,905 | $4.02M | 0.03% | +595+2.8% | Added |
| Rakuten Investment Management, Inc. | 21,778 | $4.08M | 0.01% | +2,483+12.9% | Added |
| Cetera Investment Advisers | 22,444 | $4.11M | 0.00% | −1,059−4.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 22,477 | $4.12M | 0.04% | +106+0.5% | Added |
| Natixis | 22,585 | $4.14M | 0.02% | −6,519−22.4% | Reduced |
| Leo Wealth, LLC | 22,737 | $4.17M | 0.30% | +4,604+25.4% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 22,926 | $4.20M | 0.00% | −1,993−8.0% | Reduced |
| Credit Agricole S A | 22,985 | $4.21M | 0.01% | −53,790−70.1% | Reduced |
| Mn Services Vermogensbeheer B.V. | 23,300 | $4.27M | 0.03% | 00.0% | Unchanged |
| Utah Retirement Systems | 23,714 | $4.35M | 0.04% | −282−1.2% | Reduced |
| Public Sector Pension Investment Board | 23,792 | $4.36M | 0.01% | +4,602+24.0% | Added |
| Munich Reinsurance Co Stock Corp in Munich | 23,942 | $4.39M | 0.11% | +23,942 | New |
| NorthCrest Asset Manangement, LLC | 25,012 | $4.44M | 0.14% | −8,775−26.0% | Reduced |
| Old North State Wealth Management, LLC | 24,595 | $4.51M | 2.09% | +786+3.3% | Added |
| Jones Financial Companies LLLP | 24,554 | $4.51M | 0.00% | +11,729+91.5% | Added |
| Atom Investors LP | 24,749 | $4.54M | 0.32% | +3,029+13.9% | Added |
| CAPROCK Group, Inc. | 25,651 | $4.70M | 0.11% | +2,198+9.4% | Added |
| China Universal Asset Management Co., Ltd. | 26,044 | $4.77M | 0.36% | +2,139+8.9% | Added |
| Guggenheim Capital LLC | 26,382 | $4.84M | 0.04% | +2,362+9.8% | Added |
| Leonteq Securities AG | 26,454 | $4.85M | 0.29% | −1,506−5.4% | Reduced |
| Xponance, Inc. | 26,456 | $4.85M | 0.03% | +3,418+14.8% | Added |
| Daiwa Securities Group Inc. | 27,136 | $4.97M | 0.01% | +859+3.3% | Added |
| PEAK6 LLC | 28,166 | $5.16M | 0.15% | +28,166 | New |
| Impax Asset Management Group plc | 28,728 | $5.27M | 0.04% | −3,396−10.6% | Reduced |
| Insight Wealth Strategies, LLC | 29,346 | $5.38M | 0.60% | +386+1.3% | Added |
| Hillman Capital Management, Inc. | 29,540 | $5.42M | 3.76% | −976−3.2% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 29,725 | $5.45M | 0.05% | −246−0.8% | Reduced |
| 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 |
| Nissay Asset Management Corp | 29,762 | $5.46M | 0.03% | +3,476+13.2% | Added |
| Baader Bank INC | 30,801 | $5.64M | 0.56% | −1,690−5.2% | Reduced |
| Retirement Systems of Alabama | 31,166 | $5.71M | 0.02% | −44−0.1% | Reduced |
| DnB Asset Management AS | 31,221 | $5.72M | 0.02% | +2,492+8.7% | Added |
| US Bancorp | 31,223 | $5.72M | 0.01% | +4,466+16.7% | Added |
| Swiss Life Asset Management Ltd | 31,288 | $5.74M | 0.03% | +6,092+24.2% | Added |
| Lighthouse Investment Partners, LLC | 32,632 | $5.98M | 0.22% | +26,844+463.8% | Added |
| Fifth Third Bancorp | 32,716 | $6.00M | 0.01% | +23,504+255.1% | Added |
| QRG Capital Management, Inc. | 33,002 | $6.05M | 0.06% | +29,207+769.6% | Added |
| Leuthold Group, LLC | 33,143 | $6.08M | 0.65% | +554+1.7% | Added |
| Nippon Life Global Investors Americas, Inc. | 33,570 | $6.15M | 0.28% | +7,080+26.7% | Added |
| Farmers Trust Co | 33,610 | $6.16M | 0.97% | +425+1.3% | Added |