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 |
|---|---|---|---|---|---|
| Syon Capital LLC | 3,130 | $573.8K | 0.03% | −16−0.5% | Reduced |
| Warren Averett Asset Management, LLC | 3,151 | $577.7K | 0.00% | +358+12.8% | Added |
| EverSource Wealth Advisors, LLC | 3,178 | $582.7K | 0.02% | +780+32.5% | Added |
| Massachusetts Wealth Management | 3,180 | $583.0K | 0.25% | +181+6.0% | Added |
| IKE Capital, LLC | 3,194 | $585.6K | 0.33% | 00.0% | Unchanged |
| Sax Wealth Advisors, LLC | 3,330 | $586.0K | 0.03% | 00.0% | Unchanged |
| South Dakota Investment Council | 3,213 | $589.0K | 0.01% | 00.0% | Unchanged |
| Vestcor Inc | 3,246 | $595.0K | 0.02% | 00.0% | Unchanged |
| Winton Group Ltd | 3,297 | $604.4K | 0.02% | −6,848−67.5% | Reduced |
| Everence Capital Management Inc | 3,450 | $632.0K | 0.04% | 00.0% | Unchanged |
| Lifeworks Advisors, LLC | 3,465 | $635.2K | 0.08% | −468−11.9% | Reduced |
| Hills Bank & Trust Co | 3,490 | $639.8K | 0.03% | −1,129−24.4% | Reduced |
| STRS Ohio | 3,494 | $640.6K | 0.00% | −5−0.1% | Reduced |
| Pavaki Capital Management LLC | 3,500 | $641.7K | 0.45% | 00.0% | Unchanged |
| Premier Path Wealth Partners, LLC | 3,523 | $645.8K | 0.08% | −2,207−38.5% | Reduced |
| Ironwood Financial, llc | 3,535 | $648.1K | 0.11% | 00.0% | Unchanged |
| Evolve Private Wealth, LLC | 3,536 | $648.3K | 0.03% | +353+11.1% | Added |
| Chesapeake Capital Corp | 3,544 | $649.7K | 0.47% | 00.0% | Unchanged |
| Davis Investment Partners, LLC | 3,580 | $656.3K | 0.23% | −794−18.2% | Reduced |
| Avestar Capital, LLC | 3,604 | $660.8K | 0.05% | +69+2.0% | Added |
| Farther Finance Advisors, LLC | 3,597 | $661.0K | 0.01% | +1,941+117.2% | Added |
| Siemens Fonds Invest GmbH | 3,633 | $666.0K | 0.04% | +112+3.2% | Added |
| Xxi Wealth, LLC | 3,651 | $669.3K | 0.38% | +1,136+45.2% | Added |
| Bellevue Group AG | 3,653 | $669.7K | 0.02% | +88+2.5% | Added |
| Wahed Invest LLC | 3,675 | $673.7K | 0.09% | −171−4.4% | Reduced |
| Mount Yale Investment Advisors, LLC | 3,724 | $682.7K | 0.02% | +3,724 | New |
| Burns Matteson Capital Management, LLC | 3,818 | $700.0K | 0.27% | −101−2.6% | Reduced |
| AlphaCentric Advisors LLC | 3,835 | $703.1K | 0.70% | +208+5.7% | Added |
| Kentucky Retirement Systems Insurance Trust Fund | 3,844 | $704.7K | 0.05% | 00.0% | Unchanged |
| Savvy Advisors, Inc. | 3,864 | $708.4K | 0.02% | −385−9.1% | Reduced |
| Lombard Odier Asset Management (Switzerland) SA | 3,899 | $714.8K | 0.03% | +3,899 | New |
| Farmers & Merchants Investments Inc | 3,941 | $722.5K | 0.02% | 00.0% | Unchanged |
| Securian Asset Management, Inc | 3,945 | $723.2K | 0.03% | 00.0% | Unchanged |
| Ellevest, Inc. | 3,946 | $723.4K | 0.10% | −1,221−23.6% | Reduced |
| Texas Yale Capital Corp. | 3,987 | $730.9K | 0.02% | 00.0% | Unchanged |
| Pinnacle Associates Ltd | 3,999 | $733.1K | 0.01% | −156−3.8% | Reduced |
| 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 |
| MUFG Securities Americas Inc. | 4,061 | $744.5K | 0.05% | +109+2.8% | Added |
| Ci Investments Inc. | 4,078 | $747.6K | 0.00% | −319−7.3% | Reduced |
| Beacon Pointe Advisors, LLC | 4,083 | $748.5K | 0.00% | +682+20.1% | Added |
| Intech Investment Management LLC | 4,092 | $750.2K | 0.01% | −1,450−26.2% | Reduced |
| First County Bank | 4,166 | $763.8K | 0.41% | −246−5.6% | Reduced |
| Allworth Financial LP | 4,211 | $771.9K | 0.00% | +725+20.8% | Added |
| Baird Financial Group, Inc. | 4,213 | $772.4K | 0.00% | −5,478−56.5% | Reduced |
| Storebrand Asset Management AS | 4,223 | $774.2K | 0.00% | +175+4.3% | Added |
| Jones Kertz & Associates, Inc. | 4,231 | $775.7K | 0.41% | −260−5.8% | Reduced |
| Tocqueville Asset Management L.P. | 4,352 | $797.9K | 0.01% | −1,117−20.4% | Reduced |
| V-Square Quantitative Management LLC | 4,358 | $799.0K | 0.08% | +238+5.8% | Added |
| La Banque Postale Asset Management SA | 4,367 | $800.6K | 0.01% | +4,367 | New |
| Parallel Advisors, LLC | 4,367 | $800.8K | 0.01% | +65+1.5% | Added |
| Econ Financial Services Corp | 4,397 | $806.1K | 0.37% | +451+11.4% | Added |
| Twin Capital Management Inc | 4,430 | $812.2K | 0.10% | +4,430 | New |
| Lido Advisors, LLC | 4,432 | $812.8K | 0.00% | −1,559−26.0% | Reduced |
| EFG International AG | 4,457 | $817.1K | 0.02% | +1,822+69.1% | Added |
| Gilder Gagnon Howe & Co LLC | 4,558 | $835.6K | 0.01% | +4,558 | New |
| Signaturefd, LLC | 4,608 | $844.7K | 0.01% | +238+5.4% | Added |
| Private Advisor Group, LLC | 4,649 | $852.3K | 0.00% | −1,464−23.9% | Reduced |
| Coldstream Capital Management Inc | 4,662 | $854.7K | 0.01% | −120−2.5% | Reduced |
| Northwestern Mutual Investment Management Company, LLC | 4,696 | $860.9K | 0.01% | +9+0.2% | Added |
| MAI Capital Management | 4,702 | $862.1K | 0.00% | +1,255+36.4% | Added |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 4,706 | $862.8K | 1.25% | +1,851+64.8% | Added |
| Meeder Advisory Services, Inc. | 4,721 | $865.5K | 0.04% | +57+1.2% | Added |
| Summitry LLC | 4,737 | $868.4K | 0.03% | −57−1.2% | Reduced |
| Chicago Partners Investment Group LLC | 4,598 | $873.9K | 0.02% | +1,782+63.3% | Added |
| Arkadios Wealth Advisors | 4,781 | $876.5K | 0.01% | +206+4.5% | Added |
| Holocene Advisors, LP | 4,793 | $878.7K | 0.00% | +4,793 | New |
| Beese Fulmer Investment Management, Inc. | 4,803 | $880.5K | 0.06% | +2,531+111.4% | Added |
| E. Ohman J:or Asset Management AB | 4,819 | $883.5K | 0.02% | −900−15.7% | Reduced |
| Virtus Investment Advisers, Inc. | 4,848 | $888.8K | 0.25% | +925+23.6% | Added |
| Wiley Bros.-Aintree Capital, LLC | 5,037 | $893.2K | 0.00% | +752+17.5% | Added |
| Plato Investment Management Ltd | 4,939 | $906.0K | 0.06% | 00.0% | Unchanged |
| J. Safra Sarasin Holding AG | 4,998 | $915.4K | 0.02% | −1,476−22.8% | Reduced |
| Birchview Capital, LP | 5,000 | $916.6K | 0.52% | +5,000 | New |
| Empirical Finance, LLC | 5,070 | $929.5K | 0.04% | −6−0.1% | Reduced |
| Bull Harbor Capital LLC | 5,077 | $930.8K | 0.25% | +5,077 | New |
| Unison Advisors LLC | 5,078 | $931.0K | 0.07% | 00.0% | Unchanged |
| Spears Abacus Advisors LLC | 5,083 | $931.9K | 0.02% | +4+0.1% | Added |
| Vident Advisory, LLC | 5,101 | $935.2K | 0.01% | +896+21.3% | Added |
| Taproot Management LP | 5,133 | $941.0K | 0.18% | +5,133 | New |
| Sterling Capital Management LLC | 5,136 | $941.6K | 0.02% | −3,525−40.7% | Reduced |
| Annis Gardner Whiting Capital Advisors, LLC | 5,192 | $951.9K | 0.15% | +20.0% | Added |
| Frank, Rimerman Advisors LLC | 5,194 | $952.2K | 0.06% | +12+0.2% | Added |
| Independent Financial Group, LLC | 5,198 | $952.9K | 0.02% | −616−10.6% | Reduced |
| Vise Technologies, Inc. | 5,415 | $953.0K | 0.02% | 00.0% | Unchanged |
| E Fund Management Co., Ltd. | 5,209 | $955.0K | 0.03% | +5,209 | New |
| CSM Advisors, LLC | 5,308 | $974.0K | 0.02% | −173−3.2% | Reduced |
| Wealthcare Advisory Partners LLC | 5,389 | $988.0K | 0.02% | +87+1.6% | Added |
| Saudi Central Bank | 5,415 | $992.7K | 0.02% | +5,415 | New |
| 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 |
| Sanctuary Advisors, LLC | 5,617 | $1.03M | 0.01% | +445+8.6% | Added |
| North Star Investment Management Corp. | 5,621 | $1.03M | 0.06% | −21−0.4% | Reduced |
| Jackson Creek Investment Advisors LLC | 5,662 | $1.04M | 0.31% | +5,662 | New |
| HB Wealth Management, LLC | 5,681 | $1.04M | 0.01% | +1,011+21.6% | Added |
| Essential Partners LLC | 5,719 | $1.05M | 0.35% | +5+0.1% | Added |
| Dai-Ichi Life Insurance Company, Ltd | 5,808 | $1.06M | 0.03% | −211−3.5% | Reduced |
| Kestra Advisory Services, LLC | 5,810 | $1.07M | 0.00% | +1,301+28.9% | Added |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 6,193 | $1.07M | 0.01% | 00.0% | Unchanged |
| Friedenthal Financial | 5,930 | $1.09M | 0.55% | +5,930 | New |