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
- 1,002
- +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
- 323 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 |
|---|---|---|---|---|---|
| Yousif Capital Management, LLC | 15,920 | $2.63M | 0.03% | −1,156−6.8% | Reduced |
| Element Squared LLC | 15,051 | $2.65M | 1.44% | +15,051 | New |
| Clark Estates Inc | 15,300 | $2.69M | 0.65% | 00.0% | Unchanged |
| Gabelli Funds LLC | 15,400 | $2.71M | 0.02% | +1,300+9.2% | Added |
| Wealthfront Advisers LLC | 15,551 | $2.74M | 0.01% | +4,227+37.3% | Added |
| Mutual of America Capital Management LLC | 15,793 | $2.78M | 0.03% | −136−0.9% | Reduced |
| OP Asset Management Ltd | 16,246 | $2.86M | 0.03% | 00.0% | Unchanged |
| Entropy Technologies, LP | 16,312 | $2.87M | 0.16% | +13,899+576.0% | Added |
| UniSuper Management Pty Ltd | 16,427 | $2.89M | 0.02% | −3,574−17.9% | Reduced |
| NEOS Investment Management LLC | 16,534 | $2.91M | 0.02% | −40,767−71.1% | Reduced |
| Systematic Financial Management LP | 16,640 | $2.93M | 0.07% | +11,970+256.3% | Added |
| Oregon Public Employees Retirement Fund | 16,741 | $2.95M | 0.04% | 00.0% | Unchanged |
| M&T Bank Corp | 16,761 | $2.95M | 0.01% | +2,106+14.4% | Added |
| Omers Administration Corp | 16,808 | $2.96M | 0.02% | +11,628+224.5% | Added |
| Elo Mutual Pension Insurance Co | 17,142 | $3.02M | 0.05% | −4,460−20.6% | Reduced |
| State of Alaska, Department of Revenue | 17,187 | $3.02M | 0.03% | −995−5.5% | Reduced |
| Captrust Financial Advisors | 17,375 | $3.06M | 0.01% | +843+5.1% | Added |
| Horizon Investments, LLC | 17,382 | $3.06M | 0.04% | −43,667−71.5% | Reduced |
| Ilmarinen Mutual Pension Insurance Co | 17,400 | $3.06M | 0.02% | −6,600−27.5% | Reduced |
| Hourglass Capital, LLC | 17,550 | $3.09M | 0.67% | −420−2.3% | Reduced |
| MH & Associates Securities Management Corp | 17,598 | $3.10M | 2.53% | +17,598 | New |
| Leo Wealth, LLC | 18,133 | $3.19M | 0.23% | +21+0.1% | Added |
| Commonwealth Equity Services, LLC | 18,394 | $3.24M | 0.00% | +377+2.1% | Added |
| Verition Fund Management LLC | 18,523 | $3.26M | 0.02% | −11,514−38.3% | Reduced |
| Kinneret Advisory, LLC | 18,742 | $3.30M | 0.28% | −512−2.7% | Reduced |
| Morningstar Investment Management LLC | 18,779 | $3.31M | 0.20% | 00.0% | Unchanged |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 18,873 | $3.32M | 0.12% | +18,873 | New |
| IMC-Chicago, LLC | 19,011 | $3.35M | 0.06% | +19,011 | New |
| Fluent Financial, LLC | 19,144 | $3.37M | 1.28% | −6,399−25.1% | Reduced |
| Public Sector Pension Investment Board | 19,190 | $3.38M | 0.01% | +6,344+49.4% | Added |
| Rakuten Investment Management, Inc. | 19,295 | $3.41M | 0.01% | −179,277−90.3% | Reduced |
| Comerica Bank | 19,475 | $3.43M | 0.01% | −14,195−42.2% | Reduced |
| Inspire Trust Co, N.A. | 20,000 | $3.52M | 0.58% | 00.0% | Unchanged |
| Sivik Global Healthcare LLC | 20,000 | $3.52M | 1.72% | +20,000 | New |
| Janus Henderson Group PLC | 20,252 | $3.56M | 0.00% | +1,992+10.9% | Added |
| CIBC World Markets Corp | 20,403 | $3.59M | 0.02% | +20,403 | New |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 20,422 | $3.59M | 0.03% | +401+2.0% | Added |
| GWM Advisors LLC | 21,048 | $3.70M | 0.01% | +11,910+130.3% | Added |
| Kovitz Investment Group Partners, LLC | 21,133 | $3.72M | 0.08% | −1,816−7.9% | Reduced |
| Capula Management Ltd | 21,295 | $3.75M | 0.02% | +11,087+108.6% | Added |
| New York Life Investment Management LLC | 21,310 | $3.75M | 0.03% | −174−0.8% | Reduced |
| Atom Investors LP | 21,720 | $3.82M | 0.30% | +19,498+877.5% | Added |
| NLB Skladi, upravljanje premozenja, d.o.o. | 22,007 | $3.87M | 0.18% | +22,007 | New |
| Police & Firemen's Retirement System of New Jersey | 22,371 | $3.94M | 0.03% | −1,228−5.2% | Reduced |
| Bank of Nova Scotia | 22,695 | $3.99M | 0.01% | −1,656−6.8% | Reduced |
| Xponance, Inc. | 23,038 | $4.05M | 0.03% | +1,714+8.0% | Added |
| Mn Services Vermogensbeheer B.V. | 23,300 | $4.10M | 0.03% | −3,300−12.4% | Reduced |
| CAPROCK Group, Inc. | 23,453 | $4.13M | 0.09% | +17,842+318.0% | Added |
| Teacher Retirement System of Texas | 23,489 | $4.13M | 0.01% | −14,304−37.8% | Reduced |
| Cetera Investment Advisers | 23,503 | $4.14M | 0.00% | +2,615+12.5% | Added |
| Jane Street Group, LLC | 23,539 | $4.14M | 0.00% | +18,199+340.8% | Added |
| Old North State Wealth Management, LLC | 23,809 | $4.19M | 1.97% | +1,540+6.9% | Added |
| China Universal Asset Management Co., Ltd. | 23,905 | $4.21M | 0.32% | −5,665−19.2% | Reduced |
| Utah Retirement Systems | 23,996 | $4.22M | 0.04% | 00.0% | Unchanged |
| Guggenheim Capital LLC | 24,020 | $4.23M | 0.03% | −38,643−61.7% | Reduced |
| ADAR1 Capital Management, LLC | 24,300 | $4.28M | 0.32% | +6,300+35.0% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 24,919 | $4.39M | 0.00% | −88,634−78.1% | Reduced |
| Swiss Life Asset Management Ltd | 25,196 | $4.43M | 0.02% | −15,249−37.7% | Reduced |
| British Columbia Investment Management Corp | 25,960 | $4.57M | 0.02% | +4,902+23.3% | Added |
| Mubadala Investment Co PJSC | 26,236 | $4.62M | 0.03% | +26,236 | New |
| Daiwa Securities Group Inc. | 26,277 | $4.62M | 0.02% | −17,798−40.4% | Reduced |
| Nissay Asset Management Corp | 26,286 | $4.63M | 0.02% | −19,186−42.2% | Reduced |
| Macquarie Group Ltd | 26,409 | $4.65M | 0.02% | −27,352−50.9% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 26,490 | $4.66M | 0.19% | +26,490 | New |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 26,553 | $4.67M | 0.04% | −2,400−8.3% | Reduced |
| US Bancorp | 26,757 | $4.71M | 0.01% | +5,324+24.8% | Added |
| Generali Asset Management SPA SGR | 27,181 | $4.78M | 0.10% | −13,744−33.6% | Reduced |
| Forsta Ap-Fonden | 27,300 | $4.80M | 0.03% | +2,100+8.3% | Added |
| Leonteq Securities AG | 27,960 | $4.92M | 0.26% | +4,843+20.9% | Added |
| Ritholtz Wealth Management | 28,375 | $4.99M | 0.09% | +16,695+142.9% | Added |
| DnB Asset Management AS | 28,729 | $5.06M | 0.02% | +511+1.8% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 28,748 | $5.06M | 0.02% | −335−1.2% | Reduced |
| Insight Wealth Strategies, LLC | 28,960 | $5.10M | 0.58% | +28,960 | New |
| Natixis | 29,104 | $5.12M | 0.02% | +5,068+21.1% | Added |
| B. Metzler seel. Sohn & Co. AG | 29,971 | $5.27M | 0.05% | +17,489+140.1% | Added |
| Amalgamated Bank | 30,285 | $5.33M | 0.04% | +2,503+9.0% | Added |
| Toroso Investments, LLC | 30,478 | $5.36M | 0.02% | +5,442+21.7% | Added |
| Hillman Capital Management, Inc. | 30,516 | $5.37M | 3.38% | −7,838−20.4% | Reduced |
| Simplex Trading, LLC | 30,878 | $5.43M | 0.15% | +29,762+2,666.8% | Added |
| Retirement Systems of Alabama | 31,210 | $5.49M | 0.02% | −65−0.2% | Reduced |
| Impax Asset Management Group plc | 32,124 | $5.65M | 0.04% | −932−2.8% | Reduced |
| Baader Bank INC | 32,491 | $5.71M | 0.48% | −23,483−42.0% | Reduced |
| Jefferies Financial Group Inc. | 32,513 | $5.72M | 0.05% | +1,913+6.3% | Added |
| CWA Asset Management Group, LLC | 32,534 | $5.73M | 0.21% | +2,841+9.6% | Added |
| Leuthold Group, LLC | 32,589 | $5.74M | 0.62% | +9,072+38.6% | Added |
| Farmers Trust Co | 33,185 | $5.84M | 0.95% | +7,214+27.8% | Added |
| Natixis Advisors, L.P. | 33,336 | $5.87M | 0.01% | −6,180−15.6% | Reduced |
| Meitav Dash Investments Ltd | 33,462 | $5.89M | 0.07% | +62+0.2% | Added |
| AMF Pensionsforsakring AB | 33,479 | $5.89M | 0.04% | 00.0% | Unchanged |
| NorthCrest Asset Manangement, LLC | 33,787 | $5.90M | 0.13% | +1,151+3.5% | Added |
| Grimes & Company, Inc. | 33,844 | $5.96M | 0.14% | −1,453−4.1% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,124 | $6.01M | 0.03% | −1,084−3.1% | Reduced |
| North Growth Management Ltd. | 34,000 | $6.02M | 0.94% | 00.0% | Unchanged |
| USS Investment Management Ltd | 34,216 | $6.02M | 0.03% | +2,346+7.4% | Added |
| Oversea-Chinese Banking CORP Ltd | 34,366 | $6.05M | 0.17% | −11,837−25.6% | Reduced |
| CIBC Asset Management Inc | 34,447 | $6.06M | 0.01% | −10,666−23.6% | Reduced |
| Tang Capital Management LLC | 35,000 | $6.16M | 0.30% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 35,107 | $6.18M | 0.02% | −31,903−47.6% | Reduced |
| MetLife Investment Management | 35,155 | $6.19M | 0.03% | −1,210−3.3% | Reduced |
| Parkman Healthcare Partners LLC | 35,425 | $6.23M | 0.59% | −94,740−72.8% | Reduced |