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 |
|---|---|---|---|---|---|
| Element Squared LLC | 15,051 | $2.65M | 1.44% | +15,051 | New |
| Yousif Capital Management, LLC | 15,920 | $2.63M | 0.03% | −1,156−6.8% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 14,899 | $2.62M | 0.01% | 00.0% | Unchanged |
| Bokf, NA | 14,868 | $2.62M | 0.04% | −5,412−26.7% | Reduced |
| Avanza Fonder AB | 14,743 | $2.59M | 0.07% | −544−3.6% | Reduced |
| Colony Group, LLC | 14,581 | $2.57M | 0.00% | +4,664+47.0% | Added |
| Advisor Group Holdings, Inc. | 14,447 | $2.54M | 0.00% | +2,854+24.6% | Added |
| Fieldview Capital Management, LLC | 14,272 | $2.51M | 0.43% | +14,272 | New |
| Profund Advisors LLC | 14,200 | $2.50M | 0.08% | −9,931−41.2% | Reduced |
| Stoneridge Investment Partners LLC | 14,116 | $2.48M | 1.73% | −483−3.3% | Reduced |
| Thrivent Financial for Lutherans | 13,987 | $2.46M | 0.00% | −68,104−83.0% | Reduced |
| Nordea Investment Management AB | 14,022 | $2.46M | 0.00% | −118,561−89.4% | Reduced |
| Pathstone Holdings, LLC | 13,808 | $2.43M | 0.01% | +824+6.3% | Added |
| Evoke Wealth, LLC | 13,543 | $2.38M | 0.05% | +171+1.3% | Added |
| Camarda Financial Advisors, LLC | 13,257 | $2.33M | 0.89% | +13,257 | New |
| Maven Securities LTD | 13,069 | $2.30M | 0.29% | +13,069 | New |
| Jones Financial Companies LLLP | 12,825 | $2.26M | 0.00% | +3,969+44.8% | Added |
| Beacon Investment Advisory Services, Inc. | 12,674 | $2.23M | 0.09% | −256−2.0% | Reduced |
| Provident Co of the Employees of the Hebrew University LTD | 12,529 | $2.20M | 2.29% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 12,348 | $2.17M | 0.01% | +1,773+16.8% | Added |
| Investment Management Corp of Ontario | 12,342 | $2.17M | 0.03% | +2,955+31.5% | Added |
| Twin Tree Management, LP | 12,270 | $2.16M | 0.22% | +12,270 | New |
| Convergence Investment Partners, LLC | 12,156 | $2.14M | 0.43% | +2,573+26.8% | Added |
| Triglav Skladi, D.O.O. | 12,130 | $2.13M | 0.13% | −6,000−33.1% | Reduced |
| HighTower Advisors, LLC | 11,959 | $2.10M | 0.00% | +1,843+18.2% | Added |
| Pallas Capital Advisors LLC | 11,783 | $2.07M | 0.07% | +158+1.4% | Added |
| Janney Montgomery Scott LLC | 11,775 | $2.07M | 0.00% | −6,928−37.0% | Reduced |
| Public Employees Retirement Association of Colorado | 11,669 | $2.05M | 0.01% | 00.0% | Unchanged |
| Brinker Capital Investments, LLC | 11,440 | $2.01M | 0.01% | +6,612+137.0% | Added |
| Teachers Retirement System of the State of Kentucky | 11,437 | $2.01M | 0.02% | 00.0% | Unchanged |
| Truist Financial Corp | 11,407 | $2.01M | 0.00% | +2,450+27.4% | Added |
| Neuberger Berman Group LLC | 11,404 | $2.01M | 0.00% | +426+3.9% | Added |
| Catalyst Funds Management Pty Ltd | 11,400 | $2.01M | 0.47% | +11,400 | New |
| Summit Financial, LLC | 11,139 | $1.96M | 0.03% | +11,139 | New |
| Mizuho Securities USA LLC | 10,682 | $1.95M | 0.03% | +40.0% | Added |
| Generali Investments, Management Co LLC | 10,974 | $1.93M | 0.38% | +1,004+10.1% | Added |
| Sig Brokerage, LP | 10,922 | $1.92M | 0.65% | +6,141+128.4% | Added |
| Pinnacle Financial Partners, Inc. | 10,909 | $1.92M | 0.01% | +10,909 | New |
| Ensign Peak Advisors, Inc | 10,676 | $1.88M | 0.00% | −24,110−69.3% | Reduced |
| Sequoia Financial Advisors, LLC | 10,564 | $1.86M | 0.01% | +1,468+16.1% | Added |
| Merit Financial Group, LLC | 10,517 | $1.85M | 0.01% | +2,150+25.7% | Added |
| Aster Capital Management (DIFC) Ltd | 10,487 | $1.85M | 0.81% | +10,487 | New |
| Winton Group Ltd | 10,145 | $1.79M | 0.06% | +10,145 | New |
| Crossmark Global Holdings, Inc. | 10,094 | $1.78M | 0.03% | +6,436+175.9% | Added |
| Krensavage Asset Management, LLC | 10,000 | $1.76M | 0.62% | 00.0% | Unchanged |
| K.J. Harrison & Partners Inc | 10,000 | $1.76M | 0.23% | −6−0.1% | Reduced |
| Glenmede Trust Co NA | 9,919 | $1.75M | 0.01% | +9,919 | New |
| Jacobs Levy Equity Management, Inc | 9,873 | $1.74M | 0.01% | −251−2.5% | Reduced |
| Vontobel Holding Ltd. | 9,841 | $1.73M | 0.01% | −10,147−50.8% | Reduced |
| Baird Financial Group, Inc. | 9,691 | $1.71M | 0.00% | −3,057−24.0% | Reduced |
| Allstate Corp | 9,672 | $1.70M | 0.02% | +4,972+105.8% | Added |
| Great Lakes Advisors, LLC | 9,490 | $1.67M | 0.01% | +11+0.1% | Added |
| ICICI Prudential Asset Management Co Ltd | 9,462 | $1.67M | 0.19% | −12,241−56.4% | Reduced |
| Fifth Third Bancorp | 9,212 | $1.62M | 0.01% | +202+2.2% | Added |
| Norinchukin Bank, The | 9,186 | $1.62M | 0.02% | −3,442−27.3% | Reduced |
| Kentucky Retirement Systems | 9,171 | $1.61M | 0.04% | 00.0% | Unchanged |
| PensionDanmark Pensionsforsikringsaktieselskab | 9,162 | $1.61M | 0.01% | +9,162 | New |
| Kennedy Capital Management, Inc. | 9,003 | $1.58M | 0.03% | +166+1.9% | Added |
| Callan Family Office, LLC | 8,995 | $1.58M | 0.03% | +6,843+318.0% | Added |
| Auxier Asset Management | 8,911 | $1.57M | 0.22% | −1,251−12.3% | Reduced |
| Two Sigma Advisers, LP | 8,800 | $1.55M | 0.00% | −4,700−34.8% | Reduced |
| Abacus Wealth Partners, LLC | 8,768 | $1.54M | 0.15% | +8,768 | New |
| Quadrant Capital Group LLC | 8,664 | $1.52M | 0.05% | +136+1.6% | Added |
| Sterling Capital Management LLC | 8,661 | $1.52M | 0.02% | −371−4.1% | Reduced |
| LMR Partners LLP | 8,630 | $1.52M | 0.01% | +8,630 | New |
| M&G Plc | 8,593 | $1.51M | 0.01% | 00.0% | Unchanged |
| Hartford Investment Management Co | 8,501 | $1.50M | 0.04% | −121−1.4% | Reduced |
| Missouri Trust & Investment Co | 8,490 | $1.49M | 0.44% | +65+0.8% | Added |
| Blair William & Co | 8,443 | $1.49M | 0.00% | −5,577−39.8% | Reduced |
| Groupama Asset Managment | 8,431 | $1.48M | 0.02% | −93−1.1% | Reduced |
| Keybank National Association | 8,418 | $1.48M | 0.01% | +164+2.0% | Added |
| Thor Investment Management Inc | 8,314 | $1.46M | 0.84% | +76+0.9% | Added |
| AG2R la Mondiale Gestion D'Actifs | 8,264 | $1.45M | 0.06% | +8,264 | New |
| MML Investors Services, LLC | 8,225 | $1.45M | 0.00% | +939+12.9% | Added |
| Cairn Investment Group, Inc. | 8,096 | $1.43M | 0.68% | −108−1.3% | Reduced |
| Whittier Trust Co of Nevada Inc | 7,708 | $1.41M | 0.03% | −13−0.2% | Reduced |
| Canada Post Corp Registered Pension Plan | 7,973 | $1.40M | 0.05% | +780+10.8% | Added |
| Gulf International Bank (UK) Ltd | 7,901 | $1.39M | 0.05% | −23−0.3% | Reduced |
| Jacobi Capital Management LLC | 7,836 | $1.38M | 0.08% | −289−3.6% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 7,819 | $1.38M | 0.00% | +3,478+80.1% | Added |
| Krilogy Financial LLC | 7,706 | $1.33M | 0.05% | −10.0% | Reduced |
| Sompo Asset Management Co., Ltd. | 7,576 | $1.33M | 0.23% | +4,336+133.8% | Added |
| North Dakota State Investment Board | 7,575 | $1.33M | 0.05% | +7,575 | New |
| Buckingham Strategic Partners | 7,505 | $1.32M | 0.02% | +118+1.6% | Added |
| Louisiana State Employees Retirement System | 7,500 | $1.32M | 0.02% | −10,900−59.2% | Reduced |
| Maryland State Retirement & Pension System | 7,381 | $1.30M | 0.03% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 7,286 | $1.30M | 0.00% | +264+3.8% | Added |
| Linden Thomas Advisory Services, LLC | 7,264 | $1.28M | 0.13% | −329−4.3% | Reduced |
| Metis Global Partners, LLC | 7,211 | $1.27M | 0.03% | +887+14.0% | Added |
| Brown Advisory Inc | 7,191 | $1.27M | 0.00% | −22−0.3% | Reduced |
| Stableford Capital II LLC | 6,914 | $1.22M | 0.44% | +6,914 | New |
| Citizens & Northern Corp | 6,912 | $1.22M | 0.30% | −84−1.2% | Reduced |
| VestGen Advisors, LLC | 6,884 | $1.21M | 0.05% | +6,884 | New |
| GF Fund Management Co. Ltd. | 6,880 | $1.21M | 0.02% | −29,529−81.1% | Reduced |
| New Mexico Educational Retirement Board | 6,824 | $1.20M | 0.04% | +200+3.0% | Added |
| Laird Norton Trust Company, LLC | 6,820 | $1.20M | 0.02% | +6,820 | New |
| Pensionmark Financial Group, LLC | 6,739 | $1.19M | 0.02% | +317+4.9% | Added |
| Paragon Capital Management Inc | 6,686 | $1.18M | 0.91% | +6,686 | New |
| Bank of Hawaii | 6,667 | $1.17M | 0.06% | +6,667 | New |
| Osmosis Investment Management UK Ltd | 6,635 | $1.17M | 0.03% | +6,635 | New |