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, Q3 2025
Institutional positions in Biogen Inc. as of Sep 30, 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
- 909
- +52 vs. Q2 2025
- Shares held
- 131.3M
- +3.52M (+2.8%) vs. Q2 2025
- Total value
- $18.4B
- +$2.32B (+14.5%) vs. Q2 2025
- New holders
- 125
- 323 more added
- Sold out
- 73
- 268 more reduced
10 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Biogen Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Public Employees Retirement Association of Colorado | 11,669 | $1.64M | 0.01% | 00.0% | Unchanged |
| Pallas Capital Advisors LLC | 11,625 | $1.63M | 0.06% | −740−6.0% | Reduced |
| Ostrum Asset Management | 11,458 | $1.61M | 0.07% | −3,067−21.1% | Reduced |
| Teachers Retirement System of the State of Kentucky | 11,437 | $1.60M | 0.01% | 00.0% | Unchanged |
| Wealthfront Advisers LLC | 11,324 | $1.59M | 0.00% | +2,640+30.4% | Added |
| Advisor Group Holdings, Inc. | 11,593 | $1.58M | 0.00% | +2,858+32.7% | Added |
| K.J. Harrison & Partners Inc | 10,006 | $1.55M | 0.22% | +10,006 | New |
| Neuberger Berman Group LLC | 10,978 | $1.54M | 0.00% | −138−1.2% | Reduced |
| Federation des caisses Desjardins du Quebec | 10,575 | $1.48M | 0.01% | +431+4.2% | Added |
| Capula Management Ltd | 10,208 | $1.43M | 0.01% | +10,208 | New |
| Pitcairn Co | 10,192 | $1.43M | 0.11% | +2,738+36.7% | Added |
| Auxier Asset Management | 10,162 | $1.42M | 0.20% | −70−0.7% | Reduced |
| Jacobs Levy Equity Management, Inc | 10,124 | $1.42M | 0.01% | −2,501−19.8% | Reduced |
| HighTower Advisors, LLC | 10,116 | $1.42M | 0.00% | +1,245+14.0% | Added |
| Mizuho Securities USA LLC | 10,678 | $1.41M | 0.03% | +548+5.4% | Added |
| Colony Group, LLC | 9,917 | $1.41M | 0.00% | +3,209+47.8% | Added |
| Krensavage Asset Management, LLC | 10,000 | $1.40M | 0.60% | +10,000 | New |
| Generali Investments, Management Co LLC | 9,970 | $1.40M | 0.29% | +8,008+408.2% | Added |
| SG Americas Securities, LLC | 9,707 | $1.36M | 0.00% | −12,763−56.8% | Reduced |
| Convergence Investment Partners, LLC | 9,583 | $1.34M | 0.30% | +9,583 | New |
| Great Lakes Advisors, LLC | 9,479 | $1.33M | 0.01% | +9,479 | New |
| Shelton Capital Management | 9,444 | $1.32M | 0.03% | −7,924−45.6% | Reduced |
| Investment Management Corp of Ontario | 9,387 | $1.31M | 0.02% | +3,309+54.4% | Added |
| Kentucky Retirement Systems | 9,171 | $1.28M | 0.04% | −162−1.7% | Reduced |
| GWM Advisors LLC | 9,138 | $1.28M | 0.01% | +6,465+241.9% | Added |
| Sequoia Financial Advisors, LLC | 9,096 | $1.27M | 0.01% | +4,569+100.9% | Added |
| J. Safra Sarasin Holding AG | 9,081 | $1.27M | 0.02% | +6,707+282.5% | Added |
| Empowered Funds, LLC | 9,043 | $1.27M | 0.01% | +700+8.4% | Added |
| Premier Path Wealth Partners, LLC | 9,043 | $1.27M | 0.16% | −508−5.3% | Reduced |
| Sterling Capital Management LLC | 9,032 | $1.27M | 0.02% | −691−7.1% | Reduced |
| Fifth Third Bancorp | 9,010 | $1.26M | 0.00% | +1,633+22.1% | Added |
| Shay Capital LLC | 9,000 | $1.26M | 0.23% | +9,000 | New |
| Harvest Fund Management Co., Ltd | 8,998 | $1.26M | 0.05% | +679+8.2% | Added |
| Truist Financial Corp | 8,957 | $1.25M | 0.00% | +254+2.9% | Added |
| Kennedy Capital Management, Inc. | 8,837 | $1.24M | 0.03% | +4,334+96.2% | Added |
| Whittier Trust Co of Nevada Inc | 7,721 | $1.23M | 0.03% | −25−0.3% | Reduced |
| Jones Financial Companies LLLP | 8,856 | $1.22M | 0.00% | +1,277+16.8% | Added |
| Dakota Wealth Management | 8,677 | $1.22M | 0.02% | +8,677 | New |
| Hartford Investment Management Co | 8,622 | $1.21M | 0.04% | −169−1.9% | Reduced |
| M&G Plc | 8,593 | $1.20M | 0.01% | 00.0% | Unchanged |
| Quadrant Capital Group LLC | 8,528 | $1.19M | 0.04% | +356+4.4% | Added |
| Groupama Asset Managment | 8,524 | $1.19M | 0.02% | −394−4.4% | Reduced |
| Krilogy Financial LLC | 7,707 | $1.18M | 0.04% | +7,707 | New |
| Missouri Trust & Investment Co | 8,425 | $1.18M | 0.35% | +615+7.9% | Added |
| Merit Financial Group, LLC | 8,367 | $1.17M | 0.01% | +1,376+19.7% | Added |
| Capstone Investment Advisors, LLC | 8,271 | $1.16M | 0.01% | +2,285+38.2% | Added |
| Keybank National Association | 8,254 | $1.16M | 0.00% | +161+2.0% | Added |
| Thor Investment Management Inc | 8,238 | $1.15M | 0.70% | +999+13.8% | Added |
| Cairn Investment Group, Inc. | 8,204 | $1.15M | 0.55% | −70−0.8% | Reduced |
| Jacobi Capital Management LLC | 8,125 | $1.14M | 0.07% | +162+2.0% | Added |
| Buckingham Strategic Partners | 7,387 | $1.13M | 0.01% | +1,076+17.0% | Added |
| CSM Advisors, LLC | 7,971 | $1.12M | 0.03% | −19,488−71.0% | Reduced |
| Gulf International Bank (UK) Ltd | 7,924 | $1.11M | 0.04% | 00.0% | Unchanged |
| CSS LLC | 7,750 | $1.09M | 0.06% | +830+12.0% | Added |
| Allspring Global Investments Holdings, LLC | 7,022 | $1.08M | 0.00% | −251−3.5% | Reduced |
| Squarepoint Ops LLC | 7,628 | $1.07M | 0.00% | −29,533−79.5% | Reduced |
| Linden Thomas Advisory Services, LLC | 7,593 | $1.06M | 0.11% | +42+0.6% | Added |
| Maryland State Retirement & Pension System | 7,381 | $1.03M | 0.02% | +572+8.4% | Added |
| MML Investors Services, LLC | 7,286 | $1.02M | 0.00% | −1,274−14.9% | Reduced |
| Brown Advisory Inc | 7,213 | $1.01M | 0.00% | −18−0.2% | Reduced |
| Landscape Capital Management, L.L.C. | 7,122 | $997.6K | 0.06% | +7,122 | New |
| Canada Post Corp Registered Pension Plan | 7,193 | $996.4K | 0.04% | 00.0% | Unchanged |
| Citizens & Northern Corp | 6,996 | $980.0K | 0.24% | −32−0.5% | Reduced |
| Fox Run Management, L.L.C. | 6,969 | $976.2K | 0.15% | −5,922−45.9% | Reduced |
| Securian Asset Management, Inc | 6,950 | $973.6K | 0.03% | −646−8.5% | Reduced |
| Assenagon Asset Management S.A. | 6,913 | $968.4K | 0.00% | −4,023−36.8% | Reduced |
| Twin Capital Management Inc | 6,788 | $950.9K | 0.12% | −5,246−43.6% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 6,193 | $929.4K | 0.01% | 00.0% | Unchanged |
| New Mexico Educational Retirement Board | 6,624 | $928.0K | 0.03% | −200−2.9% | Reduced |
| Tocqueville Asset Management L.P. | 6,551 | $917.7K | 0.01% | +964+17.3% | Added |
| Brighton Jones LLC | 6,514 | $912.4K | 0.02% | +1,412+27.7% | Added |
| Koss-Olinger Consulting, LLC | 7,256 | $911.0K | 0.08% | 00.0% | Unchanged |
| Pensionmark Financial Group, LLC | 6,422 | $899.6K | 0.02% | −56−0.9% | Reduced |
| E. Ohman J:or Asset Management AB | 6,399 | $896.4K | 0.02% | 00.0% | Unchanged |
| Commerce Bank | 6,357 | $890.5K | 0.00% | +121+1.9% | Added |
| Jump Financial, LLC | 6,352 | $889.8K | 0.01% | −1,817−22.2% | Reduced |
| denkapparat Operations GmbH | 6,338 | $887.8K | 0.57% | +2,098+49.5% | Added |
| Metis Global Partners, LLC | 6,324 | $885.9K | 0.02% | −323−4.9% | Reduced |
| Lido Advisors, LLC | 6,299 | $882.4K | 0.00% | +1,151+22.4% | Added |
| Mogy Joel R Investment Counsel Inc | 6,260 | $876.9K | 0.05% | 00.0% | Unchanged |
| Emerald Advisers, LLC | 6,247 | $875.1K | 0.03% | +3,066+96.4% | Added |
| Ameritas Investment Partners, Inc. | 6,226 | $872.1K | 0.03% | +39+0.6% | Added |
| Greenleaf Trust | 6,119 | $857.1K | 0.01% | +450+7.9% | Added |
| Advisors Asset Management, Inc. | 6,080 | $851.7K | 0.01% | +367+6.4% | Added |
| Money Concepts Capital Corp | 6,058 | $848.6K | 0.05% | +29+0.5% | Added |
| Summitry LLC | 6,043 | $846.5K | 0.04% | +3,392+128.0% | Added |
| Dai-Ichi Life Insurance Company, Ltd | 6,019 | $843.1K | 0.02% | 00.0% | Unchanged |
| PKO Investment Management Joint-Stock Co | 6,000 | $840.5K | 0.07% | −1,800−23.1% | Reduced |
| Holocene Advisors, LP | 5,979 | $837.5K | 0.00% | +5,979 | New |
| Ballentine Partners, LLC | 5,941 | $832.2K | 0.01% | +466+8.5% | Added |
| Northwestern Mutual Wealth Management Co | 5,930 | $830.7K | 0.00% | +127+2.2% | Added |
| Summit Trail Advisors, LLC | 5,889 | $824.9K | 0.01% | +3,202+119.2% | Added |
| Gifford Fong Associates | 5,750 | $805.0K | 0.17% | 00.0% | Unchanged |
| Hills Bank & Trust Co | 5,745 | $804.8K | 0.05% | +159+2.8% | Added |
| BI Asset Management Fondsmaeglerselskab A/S | 5,688 | $797.0K | 0.01% | −938−14.2% | Reduced |
| North Star Investment Management Corp. | 5,622 | $787.5K | 0.05% | 00.0% | Unchanged |
| Tokio Marine Asset Management Co Ltd | 5,569 | $780.1K | 0.03% | 00.0% | Unchanged |
| Essential Partners LLC | 5,559 | $778.7K | 0.26% | +214+4.0% | Added |
| Boothbay Fund Management, LLC | 5,500 | $770.4K | 0.02% | −5,422−49.6% | Reduced |
| Shell Asset Management Co | 5,448 | $763.0K | 0.08% | −2,992−35.5% | Reduced |