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 |
|---|---|---|---|---|---|
| Northwestern Mutual Wealth Management Co | 6,584 | $1.16M | 0.00% | +654+11.0% | Added |
| J. Safra Sarasin Holding AG | 6,474 | $1.14M | 0.02% | −2,607−28.7% | Reduced |
| Commerce Bank | 6,378 | $1.12M | 0.01% | +21+0.3% | Added |
| denkapparat Operations GmbH | 6,338 | $1.12M | 0.61% | 00.0% | Unchanged |
| Greenleaf Trust | 6,309 | $1.11M | 0.01% | +190+3.1% | Added |
| Ballentine Partners, LLC | 6,305 | $1.11M | 0.02% | +364+6.1% | Added |
| Mogy Joel R Investment Counsel Inc | 6,260 | $1.10M | 0.06% | 00.0% | Unchanged |
| United Capital Financial Advisers, LLC | 6,255 | $1.10M | 0.01% | +822+15.1% | Added |
| Advisors Asset Management, Inc. | 6,212 | $1.09M | 0.02% | +132+2.2% | Added |
| Assenagon Asset Management S.A. | 6,200 | $1.09M | 0.00% | −713−10.3% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 6,193 | $1.08M | 0.01% | 00.0% | Unchanged |
| Private Advisor Group, LLC | 6,113 | $1.08M | 0.01% | +1,646+36.8% | Added |
| CSS LLC | 6,080 | $1.07M | 0.06% | −1,670−21.5% | Reduced |
| Ascent Group, LLC | 6,034 | $1.06M | 0.04% | +2,086+52.8% | Added |
| Emerald Advisers, LLC | 6,027 | $1.06M | 0.03% | −220−3.5% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 6,019 | $1.06M | 0.03% | 00.0% | Unchanged |
| MUFG Securities EMEA plc | 6,017 | $1.06M | 0.01% | +3,211+114.4% | Added |
| Knott David M Jr | 6,000 | $1.06M | 0.49% | +4,000+200.0% | Added |
| Independent Advisor Alliance | 5,987 | $1.05M | 0.03% | +3,816+175.8% | Added |
| Sagewood Asset Management LP | 5,899 | $1.04M | 0.37% | +5,899 | New |
| Forum Financial Management, LP | 5,887 | $1.04M | 0.01% | +3,039+106.7% | Added |
| Independent Financial Group, LLC | 5,814 | $1.02M | 0.02% | +4,386+307.1% | Added |
| Lighthouse Investment Partners, LLC | 5,788 | $1.02M | 0.03% | −22,212−79.3% | Reduced |
| Jump Financial, LLC | 5,779 | $1.02M | 0.01% | −573−9.0% | Reduced |
| Gifford Fong Associates | 5,750 | $1.01M | 0.20% | 00.0% | Unchanged |
| Premier Path Wealth Partners, LLC | 5,730 | $1.01M | 0.13% | −3,313−36.6% | Reduced |
| Skopos Labs, Inc. | 5,702 | $1.01M | 0.05% | +1,446+34.0% | Added |
| E. Ohman J:or Asset Management AB | 5,719 | $1.01M | 0.02% | −680−10.6% | Reduced |
| Essential Partners LLC | 5,714 | $1.01M | 0.31% | +155+2.8% | Added |
| North Star Investment Management Corp. | 5,642 | $992.9K | 0.06% | +20+0.4% | Added |
| Tokio Marine Asset Management Co Ltd | 5,569 | $980.1K | 0.03% | 00.0% | Unchanged |
| BI Asset Management Fondsmaeglerselskab A/S | 5,571 | $980.0K | 0.01% | −117−2.1% | Reduced |
| Intech Investment Management LLC | 5,542 | $975.3K | 0.01% | +1,269+29.7% | Added |
| GAMMA Investing LLC | 5,516 | $970.8K | 0.05% | +1,173+27.0% | Added |
| CSM Advisors, LLC | 5,481 | $964.0K | 0.03% | −2,490−31.2% | Reduced |
| Tocqueville Asset Management L.P. | 5,469 | $962.5K | 0.01% | −1,082−16.5% | Reduced |
| Two Sigma Securities, LLC | 5,430 | $955.6K | 0.13% | +5,430 | New |
| Vise Technologies, Inc. | 5,415 | $953.0K | 0.02% | +2,616+93.5% | Added |
| Summit Trail Advisors, LLC | 5,401 | $950.5K | 0.02% | −488−8.3% | Reduced |
| Guardian Investment Management | 5,400 | $950.3K | 0.76% | 00.0% | Unchanged |
| Wealthcare Advisory Partners LLC | 5,302 | $933.1K | 0.02% | +5,302 | New |
| Sigma Planning Corp | 5,246 | $923.2K | 0.03% | +5,246 | New |
| Annis Gardner Whiting Capital Advisors, LLC | 5,190 | $913.4K | 0.17% | +12+0.2% | Added |
| Frank, Rimerman Advisors LLC | 5,182 | $912.0K | 0.06% | +10.0% | Added |
| Sanctuary Advisors, LLC | 5,172 | $910.2K | 0.00% | +1,375+36.2% | Added |
| Ellevest, Inc. | 5,167 | $909.3K | 0.13% | +272+5.6% | Added |
| Elevated Private Wealth, LLC | 5,163 | $908.6K | 0.95% | +5,163 | New |
| Spears Abacus Advisors LLC | 5,079 | $893.9K | 0.02% | 00.0% | Unchanged |
| Unison Advisors LLC | 5,078 | $893.7K | 0.08% | 00.0% | Unchanged |
| Empirical Finance, LLC | 5,076 | $893.3K | 0.04% | −210−4.0% | Reduced |
| Laurion Capital Management LP | 5,033 | $885.8K | 0.06% | +5,033 | New |
| Polymer Capital Management (US) LLC | 5,022 | $883.8K | 0.11% | +2,348+87.8% | Added |
| Rockefeller Capital Management L.P. | 5,007 | $881.2K | 0.00% | −168−3.2% | Reduced |
| Brown Brothers Harriman & Co | 4,984 | $877.1K | 0.00% | +288+6.1% | Added |
| Plato Investment Management Ltd | 4,939 | $873.5K | 0.06% | 00.0% | Unchanged |
| Lido Advisors, LLC | 5,991 | $865.4K | 0.00% | −308−4.9% | Reduced |
| Inceptionr LLC | 4,876 | $858.1K | 0.24% | −426−8.0% | Reduced |
| Abn Amro Investment Solutions | 4,826 | $849.3K | 0.01% | +4,826 | New |
| Summitry LLC | 4,794 | $843.7K | 0.04% | −1,249−20.7% | Reduced |
| Kathmere Capital Management, LLC | 4,791 | $843.2K | 0.06% | +2,318+93.7% | Added |
| Coldstream Capital Management Inc | 4,782 | $841.6K | 0.01% | +302+6.7% | Added |
| Wiley Bros.-Aintree Capital, LLC | 4,285 | $833.0K | 0.00% | +755+21.4% | Added |
| Northwestern Mutual Investment Management Company, LLC | 4,687 | $824.9K | 0.01% | +14+0.3% | Added |
| HB Wealth Management, LLC | 4,670 | $821.9K | 0.01% | +581+14.2% | Added |
| Meeder Advisory Services, Inc. | 4,664 | $820.8K | 0.04% | +290+6.6% | Added |
| Hills Bank & Trust Co | 4,619 | $812.9K | 0.05% | −1,126−19.6% | Reduced |
| Arkadios Wealth Advisors | 4,575 | $805.2K | 0.02% | +1,679+58.0% | Added |
| Kestra Advisory Services, LLC | 4,509 | $793.5K | 0.00% | +2,387+112.5% | Added |
| Jones Kertz & Associates, Inc. | 4,491 | $790.4K | 0.41% | +4,491 | New |
| Davis Investment Partners, LLC | 4,374 | $777.8K | 0.27% | +71+1.7% | Added |
| First County Bank | 4,412 | $776.5K | 0.41% | −65−1.5% | Reduced |
| Ci Investments Inc. | 4,397 | $773.8K | 0.00% | −285−6.1% | Reduced |
| Concurrent Investment Advisors, LLC | 4,376 | $770.1K | 0.01% | +2,804+178.4% | Added |
| Signaturefd, LLC | 4,370 | $769.0K | 0.01% | +28+0.6% | Added |
| Lineweaver Wealth Advisors, LLC | 4,338 | $763.4K | 0.10% | +2,129+96.4% | Added |
| Parallel Advisors, LLC | 4,302 | $757.2K | 0.01% | +79+1.9% | Added |
| Savvy Advisors, Inc. | 4,249 | $747.8K | 0.02% | +811+23.6% | Added |
| Vident Advisory, LLC | 4,205 | $740.0K | 0.01% | −792−15.8% | Reduced |
| Pinnacle Associates Ltd | 4,155 | $731.3K | 0.01% | +7+0.2% | Added |
| David Loasby | 3,915 | $726.7K | 0.05% | +1,112+39.7% | Added |
| V-Square Quantitative Management LLC | 4,120 | $725.1K | 0.08% | +4,120 | New |
| Storebrand Asset Management AS | 4,048 | $712.4K | 0.00% | +1,713+73.4% | Added |
| Cohen Klingenstein LLC | 4,000 | $704.0K | 0.02% | 00.0% | Unchanged |
| Texas Yale Capital Corp. | 3,987 | $701.7K | 0.02% | 00.0% | Unchanged |
| MUFG Securities Americas Inc. | 3,952 | $695.5K | 0.04% | −2−0.1% | Reduced |
| Econ Financial Services Corp | 3,946 | $694.5K | 0.35% | +3,946 | New |
| Securian Asset Management, Inc | 3,945 | $694.3K | 0.03% | −3,005−43.2% | Reduced |
| Farmers & Merchants Investments Inc | 3,941 | $693.6K | 0.02% | −10.0% | Reduced |
| Lifeworks Advisors, LLC | 3,933 | $692.2K | 0.09% | −748−16.0% | Reduced |
| Virtus Investment Advisers, Inc. | 3,923 | $690.4K | 0.19% | +564+16.8% | Added |
| Burns Matteson Capital Management, LLC | 3,919 | $689.7K | 0.28% | +3,919 | New |
| Wahed Invest LLC | 3,846 | $676.9K | 0.09% | −150−3.8% | Reduced |
| Kentucky Retirement Systems Insurance Trust Fund | 3,844 | $676.5K | 0.04% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 3,831 | $674.2K | 0.02% | +356+10.2% | Added |
| QRG Capital Management, Inc. | 3,795 | $667.9K | 0.01% | +224+6.3% | Added |
| Ironwood Financial, llc | 3,535 | $656.2K | 0.11% | −8−0.2% | Reduced |
| AlphaCentric Advisors LLC | 3,627 | $638.3K | 0.64% | +3,627 | New |
| Savant Capital, LLC | 3,568 | $627.8K | 0.00% | +154+4.5% | Added |
| Bellevue Group AG | 3,565 | $627.4K | 0.01% | −648−15.4% | Reduced |
| Chesapeake Capital Corp | 3,544 | $623.7K | 0.52% | +3,544 | New |