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 |
|---|---|---|---|---|---|
| Bridger Management, LLC | 36,065 | $6.35M | 4.08% | +36,065 | New |
| Calamos Advisors LLC | 35,527 | $6.25M | 0.03% | −1,443−3.9% | Reduced |
| Parkman Healthcare Partners LLC | 35,425 | $6.23M | 0.59% | −94,740−72.8% | Reduced |
| MetLife Investment Management | 35,155 | $6.19M | 0.03% | −1,210−3.3% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 35,107 | $6.18M | 0.02% | −31,903−47.6% | Reduced |
| Tang Capital Management LLC | 35,000 | $6.16M | 0.30% | 00.0% | Unchanged |
| CIBC Asset Management Inc | 34,447 | $6.06M | 0.01% | −10,666−23.6% | Reduced |
| Oversea-Chinese Banking CORP Ltd | 34,366 | $6.05M | 0.17% | −11,837−25.6% | Reduced |
| USS Investment Management Ltd | 34,216 | $6.02M | 0.03% | +2,346+7.4% | Added |
| North Growth Management Ltd. | 34,000 | $6.02M | 0.94% | 00.0% | Unchanged |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,124 | $6.01M | 0.03% | −1,084−3.1% | Reduced |
| Grimes & Company, Inc. | 33,844 | $5.96M | 0.14% | −1,453−4.1% | Reduced |
| NorthCrest Asset Manangement, LLC | 33,787 | $5.90M | 0.13% | +1,151+3.5% | Added |
| AMF Pensionsforsakring AB | 33,479 | $5.89M | 0.04% | 00.0% | Unchanged |
| Meitav Dash Investments Ltd | 33,462 | $5.89M | 0.07% | +62+0.2% | Added |
| Natixis Advisors, L.P. | 33,336 | $5.87M | 0.01% | −6,180−15.6% | Reduced |
| Farmers Trust Co | 33,185 | $5.84M | 0.95% | +7,214+27.8% | Added |
| Leuthold Group, LLC | 32,589 | $5.74M | 0.62% | +9,072+38.6% | Added |
| CWA Asset Management Group, LLC | 32,534 | $5.73M | 0.21% | +2,841+9.6% | Added |
| Jefferies Financial Group Inc. | 32,513 | $5.72M | 0.05% | +1,913+6.3% | Added |
| Baader Bank INC | 32,491 | $5.71M | 0.48% | −23,483−42.0% | Reduced |
| Impax Asset Management Group plc | 32,124 | $5.65M | 0.04% | −932−2.8% | Reduced |
| Retirement Systems of Alabama | 31,210 | $5.49M | 0.02% | −65−0.2% | Reduced |
| Simplex Trading, LLC | 30,878 | $5.43M | 0.15% | +29,762+2,666.8% | Added |
| Hillman Capital Management, Inc. | 30,516 | $5.37M | 3.38% | −7,838−20.4% | Reduced |
| Toroso Investments, LLC | 30,478 | $5.36M | 0.02% | +5,442+21.7% | Added |
| Amalgamated Bank | 30,285 | $5.33M | 0.04% | +2,503+9.0% | Added |
| B. Metzler seel. Sohn & Co. AG | 29,971 | $5.27M | 0.05% | +17,489+140.1% | Added |
| Natixis | 29,104 | $5.12M | 0.02% | +5,068+21.1% | Added |
| Insight Wealth Strategies, LLC | 28,960 | $5.10M | 0.58% | +28,960 | New |
| Skandinaviska Enskilda Banken AB (publ) | 28,748 | $5.06M | 0.02% | −335−1.2% | Reduced |
| DnB Asset Management AS | 28,729 | $5.06M | 0.02% | +511+1.8% | Added |
| Ritholtz Wealth Management | 28,375 | $4.99M | 0.09% | +16,695+142.9% | Added |
| Leonteq Securities AG | 27,960 | $4.92M | 0.26% | +4,843+20.9% | Added |
| Forsta Ap-Fonden | 27,300 | $4.80M | 0.03% | +2,100+8.3% | Added |
| Generali Asset Management SPA SGR | 27,181 | $4.78M | 0.10% | −13,744−33.6% | Reduced |
| US Bancorp | 26,757 | $4.71M | 0.01% | +5,324+24.8% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 26,553 | $4.67M | 0.04% | −2,400−8.3% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 26,490 | $4.66M | 0.19% | +26,490 | New |
| Macquarie Group Ltd | 26,409 | $4.65M | 0.02% | −27,352−50.9% | Reduced |
| Nissay Asset Management Corp | 26,286 | $4.63M | 0.02% | −19,186−42.2% | Reduced |
| Daiwa Securities Group Inc. | 26,277 | $4.62M | 0.02% | −17,798−40.4% | Reduced |
| Mubadala Investment Co PJSC | 26,236 | $4.62M | 0.03% | +26,236 | New |
| British Columbia Investment Management Corp | 25,960 | $4.57M | 0.02% | +4,902+23.3% | Added |
| Swiss Life Asset Management Ltd | 25,196 | $4.43M | 0.02% | −15,249−37.7% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 24,919 | $4.39M | 0.00% | −88,634−78.1% | Reduced |
| ADAR1 Capital Management, LLC | 24,300 | $4.28M | 0.32% | +6,300+35.0% | Added |
| Guggenheim Capital LLC | 24,020 | $4.23M | 0.03% | −38,643−61.7% | Reduced |
| Utah Retirement Systems | 23,996 | $4.22M | 0.04% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 23,905 | $4.21M | 0.32% | −5,665−19.2% | Reduced |
| Old North State Wealth Management, LLC | 23,809 | $4.19M | 1.97% | +1,540+6.9% | Added |
| Jane Street Group, LLC | 23,539 | $4.14M | 0.00% | +18,199+340.8% | Added |
| Cetera Investment Advisers | 23,503 | $4.14M | 0.00% | +2,615+12.5% | Added |
| Teacher Retirement System of Texas | 23,489 | $4.13M | 0.01% | −14,304−37.8% | Reduced |
| CAPROCK Group, Inc. | 23,453 | $4.13M | 0.09% | +17,842+318.0% | Added |
| Mn Services Vermogensbeheer B.V. | 23,300 | $4.10M | 0.03% | −3,300−12.4% | Reduced |
| Xponance, Inc. | 23,038 | $4.05M | 0.03% | +1,714+8.0% | Added |
| Bank of Nova Scotia | 22,695 | $3.99M | 0.01% | −1,656−6.8% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 22,371 | $3.94M | 0.03% | −1,228−5.2% | Reduced |
| NLB Skladi, upravljanje premozenja, d.o.o. | 22,007 | $3.87M | 0.18% | +22,007 | New |
| Atom Investors LP | 21,720 | $3.82M | 0.30% | +19,498+877.5% | Added |
| New York Life Investment Management LLC | 21,310 | $3.75M | 0.03% | −174−0.8% | Reduced |
| Capula Management Ltd | 21,295 | $3.75M | 0.02% | +11,087+108.6% | Added |
| Kovitz Investment Group Partners, LLC | 21,133 | $3.72M | 0.08% | −1,816−7.9% | Reduced |
| GWM Advisors LLC | 21,048 | $3.70M | 0.01% | +11,910+130.3% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 20,422 | $3.59M | 0.03% | +401+2.0% | Added |
| CIBC World Markets Corp | 20,403 | $3.59M | 0.02% | +20,403 | New |
| Janus Henderson Group PLC | 20,252 | $3.56M | 0.00% | +1,992+10.9% | Added |
| Sivik Global Healthcare LLC | 20,000 | $3.52M | 1.72% | +20,000 | New |
| Inspire Trust Co, N.A. | 20,000 | $3.52M | 0.58% | 00.0% | Unchanged |
| Comerica Bank | 19,475 | $3.43M | 0.01% | −14,195−42.2% | Reduced |
| Rakuten Investment Management, Inc. | 19,295 | $3.41M | 0.01% | −179,277−90.3% | Reduced |
| Public Sector Pension Investment Board | 19,190 | $3.38M | 0.01% | +6,344+49.4% | Added |
| Fluent Financial, LLC | 19,144 | $3.37M | 1.28% | −6,399−25.1% | Reduced |
| IMC-Chicago, LLC | 19,011 | $3.35M | 0.06% | +19,011 | New |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 18,873 | $3.32M | 0.12% | +18,873 | New |
| Morningstar Investment Management LLC | 18,779 | $3.31M | 0.20% | 00.0% | Unchanged |
| Kinneret Advisory, LLC | 18,742 | $3.30M | 0.28% | −512−2.7% | Reduced |
| Verition Fund Management LLC | 18,523 | $3.26M | 0.02% | −11,514−38.3% | Reduced |
| Commonwealth Equity Services, LLC | 18,394 | $3.24M | 0.00% | +377+2.1% | Added |
| Leo Wealth, LLC | 18,133 | $3.19M | 0.23% | +21+0.1% | Added |
| MH & Associates Securities Management Corp | 17,598 | $3.10M | 2.53% | +17,598 | New |
| Hourglass Capital, LLC | 17,550 | $3.09M | 0.67% | −420−2.3% | Reduced |
| Ilmarinen Mutual Pension Insurance Co | 17,400 | $3.06M | 0.02% | −6,600−27.5% | Reduced |
| Horizon Investments, LLC | 17,382 | $3.06M | 0.04% | −43,667−71.5% | Reduced |
| Captrust Financial Advisors | 17,375 | $3.06M | 0.01% | +843+5.1% | Added |
| State of Alaska, Department of Revenue | 17,187 | $3.02M | 0.03% | −995−5.5% | Reduced |
| Elo Mutual Pension Insurance Co | 17,142 | $3.02M | 0.05% | −4,460−20.6% | Reduced |
| Omers Administration Corp | 16,808 | $2.96M | 0.02% | +11,628+224.5% | Added |
| M&T Bank Corp | 16,761 | $2.95M | 0.01% | +2,106+14.4% | Added |
| Oregon Public Employees Retirement Fund | 16,741 | $2.95M | 0.04% | 00.0% | Unchanged |
| Systematic Financial Management LP | 16,640 | $2.93M | 0.07% | +11,970+256.3% | Added |
| NEOS Investment Management LLC | 16,534 | $2.91M | 0.02% | −40,767−71.1% | Reduced |
| UniSuper Management Pty Ltd | 16,427 | $2.89M | 0.02% | −3,574−17.9% | Reduced |
| Entropy Technologies, LP | 16,312 | $2.87M | 0.16% | +13,899+576.0% | Added |
| OP Asset Management Ltd | 16,246 | $2.86M | 0.03% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 15,793 | $2.78M | 0.03% | −136−0.9% | Reduced |
| Wealthfront Advisers LLC | 15,551 | $2.74M | 0.01% | +4,227+37.3% | Added |
| Gabelli Funds LLC | 15,400 | $2.71M | 0.02% | +1,300+9.2% | Added |
| Clark Estates Inc | 15,300 | $2.69M | 0.65% | 00.0% | Unchanged |