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 |
|---|---|---|---|---|---|
| Greenleaf Trust | 6,371 | $1.17M | 0.01% | +62+1.0% | Added |
| Ballentine Partners, LLC | 6,350 | $1.16M | 0.02% | +45+0.7% | Added |
| denkapparat Operations GmbH | 6,338 | $1.16M | 0.48% | 00.0% | Unchanged |
| Hussman Strategic Advisors, Inc. | 6,300 | $1.15M | 0.25% | +6,300 | New |
| Brown Brothers Harriman & Co | 6,293 | $1.15M | 0.01% | +1,309+26.3% | Added |
| Scotia Capital Inc. | 6,274 | $1.15M | 0.00% | +6,274 | New |
| Mogy Joel R Investment Counsel Inc | 6,260 | $1.15M | 0.07% | 00.0% | Unchanged |
| Mediolanum International Funds Ltd | 6,054 | $1.14M | 0.01% | +6,054 | New |
| Metis Global Partners, LLC | 6,176 | $1.13M | 0.03% | −1,035−14.4% | Reduced |
| Pensionmark Financial Group, LLC | 6,082 | $1.12M | 0.02% | −657−9.7% | Reduced |
| Emerald Advisers, LLC | 6,027 | $1.10M | 0.03% | 00.0% | Unchanged |
| MUFG Securities EMEA plc | 6,017 | $1.10M | 0.02% | 00.0% | Unchanged |
| Bridgefront Capital, LLC | 6,010 | $1.10M | 0.27% | +6,010 | New |
| GAMMA Investing LLC | 5,993 | $1.10M | 0.05% | +477+8.6% | Added |
| Abn Amro Investment Solutions | 5,976 | $1.10M | 0.01% | +1,150+23.8% | Added |
| Friedenthal Financial | 5,930 | $1.09M | 0.55% | +5,930 | New |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 6,193 | $1.07M | 0.01% | 00.0% | Unchanged |
| Kestra Advisory Services, LLC | 5,810 | $1.07M | 0.00% | +1,301+28.9% | Added |
| Dai-Ichi Life Insurance Company, Ltd | 5,808 | $1.06M | 0.03% | −211−3.5% | Reduced |
| Essential Partners LLC | 5,719 | $1.05M | 0.35% | +5+0.1% | Added |
| HB Wealth Management, LLC | 5,681 | $1.04M | 0.01% | +1,011+21.6% | Added |
| Jackson Creek Investment Advisors LLC | 5,662 | $1.04M | 0.31% | +5,662 | New |
| North Star Investment Management Corp. | 5,621 | $1.03M | 0.06% | −21−0.4% | Reduced |
| Sanctuary Advisors, LLC | 5,617 | $1.03M | 0.01% | +445+8.6% | Added |
| Sig Brokerage, LP | 5,500 | $1.01M | 0.29% | −5,422−49.6% | Reduced |
| Guardian Investment Management | 5,500 | $1.01M | 0.82% | +100+1.9% | Added |
| Saudi Central Bank | 5,415 | $992.7K | 0.02% | +5,415 | New |
| Wealthcare Advisory Partners LLC | 5,389 | $988.0K | 0.02% | +87+1.6% | Added |
| CSM Advisors, LLC | 5,308 | $974.0K | 0.02% | −173−3.2% | Reduced |
| E Fund Management Co., Ltd. | 5,209 | $955.0K | 0.03% | +5,209 | New |
| Vise Technologies, Inc. | 5,415 | $953.0K | 0.02% | 00.0% | Unchanged |
| Independent Financial Group, LLC | 5,198 | $952.9K | 0.02% | −616−10.6% | Reduced |
| Frank, Rimerman Advisors LLC | 5,194 | $952.2K | 0.06% | +12+0.2% | Added |
| Annis Gardner Whiting Capital Advisors, LLC | 5,192 | $951.9K | 0.15% | +20.0% | Added |
| Sterling Capital Management LLC | 5,136 | $941.6K | 0.02% | −3,525−40.7% | Reduced |
| Taproot Management LP | 5,133 | $941.0K | 0.18% | +5,133 | New |
| Vident Advisory, LLC | 5,101 | $935.2K | 0.01% | +896+21.3% | Added |
| Spears Abacus Advisors LLC | 5,083 | $931.9K | 0.02% | +4+0.1% | Added |
| Unison Advisors LLC | 5,078 | $931.0K | 0.07% | 00.0% | Unchanged |
| Bull Harbor Capital LLC | 5,077 | $930.8K | 0.25% | +5,077 | New |
| Empirical Finance, LLC | 5,070 | $929.5K | 0.04% | −6−0.1% | Reduced |
| Birchview Capital, LP | 5,000 | $916.6K | 0.52% | +5,000 | New |
| J. Safra Sarasin Holding AG | 4,998 | $915.4K | 0.02% | −1,476−22.8% | Reduced |
| Plato Investment Management Ltd | 4,939 | $906.0K | 0.06% | 00.0% | Unchanged |
| Wiley Bros.-Aintree Capital, LLC | 5,037 | $893.2K | 0.00% | +752+17.5% | Added |
| Virtus Investment Advisers, Inc. | 4,848 | $888.8K | 0.25% | +925+23.6% | Added |
| E. Ohman J:or Asset Management AB | 4,819 | $883.5K | 0.02% | −900−15.7% | Reduced |
| Beese Fulmer Investment Management, Inc. | 4,803 | $880.5K | 0.06% | +2,531+111.4% | Added |
| Holocene Advisors, LP | 4,793 | $878.7K | 0.00% | +4,793 | New |
| Arkadios Wealth Advisors | 4,781 | $876.5K | 0.01% | +206+4.5% | Added |
| Chicago Partners Investment Group LLC | 4,598 | $873.9K | 0.02% | +1,782+63.3% | Added |
| Summitry LLC | 4,737 | $868.4K | 0.03% | −57−1.2% | Reduced |
| Meeder Advisory Services, Inc. | 4,721 | $865.5K | 0.04% | +57+1.2% | Added |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 4,706 | $862.8K | 1.25% | +1,851+64.8% | Added |
| MAI Capital Management | 4,702 | $862.1K | 0.00% | +1,255+36.4% | Added |
| Northwestern Mutual Investment Management Company, LLC | 4,696 | $860.9K | 0.01% | +9+0.2% | Added |
| Coldstream Capital Management Inc | 4,662 | $854.7K | 0.01% | −120−2.5% | Reduced |
| Private Advisor Group, LLC | 4,649 | $852.3K | 0.00% | −1,464−23.9% | Reduced |
| Signaturefd, LLC | 4,608 | $844.7K | 0.01% | +238+5.4% | Added |
| Gilder Gagnon Howe & Co LLC | 4,558 | $835.6K | 0.01% | +4,558 | New |
| EFG International AG | 4,457 | $817.1K | 0.02% | +1,822+69.1% | Added |
| Lido Advisors, LLC | 4,432 | $812.8K | 0.00% | −1,559−26.0% | Reduced |
| Twin Capital Management Inc | 4,430 | $812.2K | 0.10% | +4,430 | New |
| Econ Financial Services Corp | 4,397 | $806.1K | 0.37% | +451+11.4% | Added |
| Parallel Advisors, LLC | 4,367 | $800.8K | 0.01% | +65+1.5% | Added |
| La Banque Postale Asset Management SA | 4,367 | $800.6K | 0.01% | +4,367 | New |
| V-Square Quantitative Management LLC | 4,358 | $799.0K | 0.08% | +238+5.8% | Added |
| Tocqueville Asset Management L.P. | 4,352 | $797.9K | 0.01% | −1,117−20.4% | Reduced |
| Jones Kertz & Associates, Inc. | 4,231 | $775.7K | 0.41% | −260−5.8% | Reduced |
| Storebrand Asset Management AS | 4,223 | $774.2K | 0.00% | +175+4.3% | Added |
| Baird Financial Group, Inc. | 4,213 | $772.4K | 0.00% | −5,478−56.5% | Reduced |
| Allworth Financial LP | 4,211 | $771.9K | 0.00% | +725+20.8% | Added |
| First County Bank | 4,166 | $763.8K | 0.41% | −246−5.6% | Reduced |
| Intech Investment Management LLC | 4,092 | $750.2K | 0.01% | −1,450−26.2% | Reduced |
| Beacon Pointe Advisors, LLC | 4,083 | $748.5K | 0.00% | +682+20.1% | Added |
| Ci Investments Inc. | 4,078 | $747.6K | 0.00% | −319−7.3% | Reduced |
| MUFG Securities Americas Inc. | 4,061 | $744.5K | 0.05% | +109+2.8% | Added |
| Knott David M Jr | 4,000 | $733.3K | 0.44% | −2,000−33.3% | Reduced |
| Cohen Klingenstein LLC | 4,000 | $733.3K | 0.02% | 00.0% | Unchanged |
| Pinnacle Associates Ltd | 3,999 | $733.1K | 0.01% | −156−3.8% | Reduced |
| Texas Yale Capital Corp. | 3,987 | $730.9K | 0.02% | 00.0% | Unchanged |
| Ellevest, Inc. | 3,946 | $723.4K | 0.10% | −1,221−23.6% | Reduced |
| Securian Asset Management, Inc | 3,945 | $723.2K | 0.03% | 00.0% | Unchanged |
| Farmers & Merchants Investments Inc | 3,941 | $722.5K | 0.02% | 00.0% | Unchanged |
| Lombard Odier Asset Management (Switzerland) SA | 3,899 | $714.8K | 0.03% | +3,899 | New |
| Savvy Advisors, Inc. | 3,864 | $708.4K | 0.02% | −385−9.1% | Reduced |
| Kentucky Retirement Systems Insurance Trust Fund | 3,844 | $704.7K | 0.05% | 00.0% | Unchanged |
| AlphaCentric Advisors LLC | 3,835 | $703.1K | 0.70% | +208+5.7% | Added |
| Burns Matteson Capital Management, LLC | 3,818 | $700.0K | 0.27% | −101−2.6% | Reduced |
| Mount Yale Investment Advisors, LLC | 3,724 | $682.7K | 0.02% | +3,724 | New |
| Wahed Invest LLC | 3,675 | $673.7K | 0.09% | −171−4.4% | Reduced |
| Bellevue Group AG | 3,653 | $669.7K | 0.02% | +88+2.5% | Added |
| Xxi Wealth, LLC | 3,651 | $669.3K | 0.38% | +1,136+45.2% | Added |
| Siemens Fonds Invest GmbH | 3,633 | $666.0K | 0.04% | +112+3.2% | Added |
| Farther Finance Advisors, LLC | 3,597 | $661.0K | 0.01% | +1,941+117.2% | Added |
| Avestar Capital, LLC | 3,604 | $660.8K | 0.05% | +69+2.0% | Added |
| Davis Investment Partners, LLC | 3,580 | $656.3K | 0.23% | −794−18.2% | Reduced |
| Chesapeake Capital Corp | 3,544 | $649.7K | 0.47% | 00.0% | Unchanged |
| Evolve Private Wealth, LLC | 3,536 | $648.3K | 0.03% | +353+11.1% | Added |
| Ironwood Financial, llc | 3,535 | $648.1K | 0.11% | 00.0% | Unchanged |