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
- 1,014
- +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 | 1,047 | $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 |
|---|---|---|---|---|---|
| Colonial Trust Co | 3 | $550 | 0.00% | 00.0% | Unchanged |
| Fairman Group, LLC | 3 | $550 | 0.00% | 00.0% | Unchanged |
| Country Trust Bank | 2 | $367 | 0.00% | 00.0% | Unchanged |
| Davis Capital Management | 2 | $367 | 0.00% | 00.0% | Unchanged |
| Seneschal Advisors, LLC | 2 | $367 | 0.00% | 00.0% | Unchanged |
| Dogwood Wealth Management LLC | 2 | $367 | 0.00% | +2 | New |
| 3 Factor Indexing, LLC | 2 | $367 | 0.00% | +2 | New |
| NorthAvenue LLC | 1 | $184 | 0.00% | 00.0% | Unchanged |
| Rachor Investment Advisory Services, LLC | 1 | $184 | 0.00% | +1 | New |
| Nemes Rush Group LLC | 1 | $183 | 0.00% | 00.0% | Unchanged |
| ROSS\JOHNSON & Associates LLC | 1 | $183 | 0.00% | 00.0% | Unchanged |
| Triumph Capital Management | 1 | $183 | 0.00% | +1 | New |
| Portus Wealth Advisors, LLC | 1 | $183 | 0.00% | +1 | New |
| Kayne Anderson Rudnick Investment Management LLC | 0 | $180 | 0.00% | 0 | Unchanged |
| HRT Financial LP | 0 | $0 | 0.00% | −384,265−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −353,173−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −187,608−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −134,566−100.0% | Sold out |
| Suvretta Capital Management, LLC | 0 | $0 | 0.00% | −132,290−100.0% | Sold out |
| Perceptive Advisors LLC | 0 | $0 | 0.00% | −124,000−100.0% | Sold out |
| Braidwell LP | 0 | $0 | 0.00% | −115,700−100.0% | Sold out |
| Eversept Partners, LP | 0 | $0 | 0.00% | −77,944−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −71,017−100.0% | Sold out |
| Contrarius Group Holdings Ltd | 0 | $0 | 0.00% | −64,952−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −55,560−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −53,754−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −53,000−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −45,349−100.0% | Sold out |
| Bridger Management, LLC | 0 | $0 | 0.00% | −36,065−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −35,425−100.0% | Sold out |
| AMF Pensionsforsakring AB | 0 | $0 | 0.00% | −33,479−100.0% | Sold out |
| Skandinaviska Enskilda Banken AB (publ) | 0 | $0 | 0.00% | −28,748−100.0% | Sold out |
| Mubadala Investment Co PJSC | 0 | $0 | 0.00% | −26,236−100.0% | Sold out |
| Capula Management Ltd | 0 | $0 | 0.00% | −21,295−100.0% | Sold out |
| Fluent Financial, LLC | 0 | $0 | 0.00% | −19,144−100.0% | Sold out |
| IMC-Chicago, LLC | 0 | $0 | 0.00% | −19,011−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −18,523−100.0% | Sold out |
| Hourglass Capital, LLC | 0 | $0 | 0.00% | −17,550−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −16,312−100.0% | Sold out |
| Element Squared LLC | 0 | $0 | 0.00% | −15,051−100.0% | Sold out |
| Camarda Financial Advisors, LLC | 0 | $0 | 0.00% | −13,257−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −13,069−100.0% | Sold out |
| Provident Co of the Employees of the Hebrew University LTD | 0 | $0 | 0.00% | −12,529−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −11,775−100.0% | Sold out |
| Summit Financial, LLC | 0 | $0 | 0.00% | −11,139−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −9,873−100.0% | Sold out |
| ICICI Prudential Asset Management Co Ltd | 0 | $0 | 0.00% | −9,462−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −8,800−100.0% | Sold out |
| Linden Thomas Advisory Services, LLC | 0 | $0 | 0.00% | −7,264−100.0% | Sold out |
| Paragon Capital Management Inc | 0 | $0 | 0.00% | −6,686−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −5,779−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −5,033−100.0% | Sold out |
| Polymer Capital Management (US) LLC | 0 | $0 | 0.00% | −5,022−100.0% | Sold out |
| Lineweaver Wealth Advisors, LLC | 0 | $0 | 0.00% | −4,338−100.0% | Sold out |
| Tiaa Trust, National Association | 0 | $0 | 0.00% | −3,186−100.0% | Sold out |
| Alps Advisors Inc | 0 | $0 | 0.00% | −3,178−100.0% | Sold out |
| Park Avenue Securities LLC | 0 | $0 | 0.00% | −3,030−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −2,909−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −2,799−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −2,611−100.0% | Sold out |
| IHT Wealth Management, LLC | 0 | $0 | 0.00% | −2,473−100.0% | Sold out |
| NewEdge Wealth, LLC | 0 | $0 | 0.00% | −2,470−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −2,459−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −2,459−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −2,445−100.0% | Sold out |
| McAdam, LLC | 0 | $0 | 0.00% | −2,410−100.0% | Sold out |
| Supplemental Annuity Collective Trust of NJ | 0 | $0 | 0.00% | −2,300−100.0% | Sold out |
| Harbor Capital Advisors, Inc. | 0 | $0 | 0.00% | −2,294−100.0% | Sold out |
| Axxcess Wealth Management, LLC | 0 | $0 | 0.00% | −2,281−100.0% | Sold out |
| Ausdal Financial Partners, Inc. | 0 | $0 | 0.00% | −2,088−100.0% | Sold out |
| Sage Mountain Advisors LLC | 0 | $0 | 0.00% | −2,042−100.0% | Sold out |
| HighPoint Advisor Group LLC | 0 | $0 | 0.00% | −1,980−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −1,692−100.0% | Sold out |
| Financiere des Professionnels - Fonds d,investissement inc. | 0 | $0 | 0.00% | −1,646−100.0% | Sold out |
| Florida Financial Advisors, LLC | 0 | $0 | 0.00% | −1,624−100.0% | Sold out |
| Great Valley Advisor Group, Inc. | 0 | $0 | 0.00% | −1,522−100.0% | Sold out |
| Marathon Trading Investment Management LLC | 0 | $0 | 0.00% | −1,450−100.0% | Sold out |
| ING Groep NV | 0 | $0 | 0.00% | −1,434−100.0% | Sold out |
| IFG Advisory, LLC | 0 | $0 | 0.00% | −1,425−100.0% | Sold out |
| LGT Fund Management Co Ltd. | 0 | $0 | 0.00% | −1,349−100.0% | Sold out |
| Jackson Thornton Asset Management, LLC | 0 | $0 | 0.00% | −1,297−100.0% | Sold out |
| Hansen & Associates Financial Group, Inc. | 0 | $0 | 0.00% | −1,226−100.0% | Sold out |
| Keel Point, LLC | 0 | $0 | 0.00% | −1,292−100.0% | Sold out |
| Valeo Financial Advisors, LLC | 0 | $0 | 0.00% | −1,197−100.0% | Sold out |
| Howard Capital Management Inc. | 0 | $0 | 0.00% | −1,161−100.0% | Sold out |
| Cladis Investment Advisory, LLC | 0 | $0 | 0.00% | −1,040−100.0% | Sold out |
| Bayforest Capital Ltd | 0 | $0 | 0.00% | −887−100.0% | Sold out |
| Jessup Wealth Management, Inc | 0 | $0 | 0.00% | −727−100.0% | Sold out |
| TCTC Holdings, LLC | 0 | $0 | 0.00% | −600−100.0% | Sold out |
| Armstrong Advisory Group, Inc | 0 | $0 | 0.00% | −356−100.0% | Sold out |
| Elyxium Wealth, LLC | 0 | $0 | 0.00% | −330−100.0% | Sold out |
| Sentry Investment Management LLC | 0 | $0 | 0.00% | −305−100.0% | Sold out |
| Board of the Pension Protection Fund | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Twin Lakes Capital Management, LLC | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| Reflection Asset Management | 0 | $0 | 0.00% | −141−100.0% | Sold out |
| Concord Wealth Partners | 0 | $0 | 0.00% | −114−100.0% | Sold out |
| Intesa Sanpaolo S.p.A. | 0 | $0 | 0.00% | −110−100.0% | Sold out |
| Torren Management, LLC | 0 | $0 | 0.00% | −107−100.0% | Sold out |
| Fideuram Asset Management (Ireland) dac | 0 | $0 | 0.00% | −126−100.0% | Sold out |
| Kerr Financial Planning Corp | 0 | $0 | 0.00% | −100−100.0% | Sold out |