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
- 1,014
- +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
- 401 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 |
|---|---|---|---|---|---|
| GAMMA Investing LLC | 5,993 | $1.10M | 0.05% | +477+8.6% | Added |
| Bridgefront Capital, LLC | 6,010 | $1.10M | 0.27% | +6,010 | New |
| MUFG Securities EMEA plc | 6,017 | $1.10M | 0.02% | 00.0% | Unchanged |
| Emerald Advisers, LLC | 6,027 | $1.10M | 0.03% | 00.0% | Unchanged |
| Pensionmark Financial Group, LLC | 6,082 | $1.12M | 0.02% | −657−9.7% | Reduced |
| Metis Global Partners, LLC | 6,176 | $1.13M | 0.03% | −1,035−14.4% | Reduced |
| Mediolanum International Funds Ltd | 6,054 | $1.14M | 0.01% | +6,054 | New |
| Mogy Joel R Investment Counsel Inc | 6,260 | $1.15M | 0.07% | 00.0% | Unchanged |
| Scotia Capital Inc. | 6,274 | $1.15M | 0.00% | +6,274 | New |
| Brown Brothers Harriman & Co | 6,293 | $1.15M | 0.01% | +1,309+26.3% | Added |
| Hussman Strategic Advisors, Inc. | 6,300 | $1.15M | 0.25% | +6,300 | New |
| denkapparat Operations GmbH | 6,338 | $1.16M | 0.48% | 00.0% | Unchanged |
| Ballentine Partners, LLC | 6,350 | $1.16M | 0.02% | +45+0.7% | Added |
| Greenleaf Trust | 6,371 | $1.17M | 0.01% | +62+1.0% | Added |
| Tokio Marine Asset Management Co Ltd | 6,428 | $1.18M | 0.04% | +859+15.4% | Added |
| Advisors Asset Management, Inc. | 6,431 | $1.18M | 0.02% | +219+3.5% | Added |
| Savant Capital, LLC | 6,479 | $1.19M | 0.01% | +2,911+81.6% | Added |
| Sagewood Asset Management LP | 6,493 | $1.19M | 0.37% | +594+10.1% | Added |
| Callan Family Office, LLC | 6,499 | $1.19M | 0.03% | −2,496−27.7% | Reduced |
| Nicolet Bankshares Inc | 6,516 | $1.20M | 0.04% | +4,347+200.4% | Added |
| Kathmere Capital Management, LLC | 6,643 | $1.22M | 0.08% | +1,852+38.7% | Added |
| Osmosis Investment Management UK Ltd | 6,652 | $1.22M | 0.03% | +17+0.3% | Added |
| North Dakota State Investment Board | 6,670 | $1.22M | 0.05% | −905−11.9% | Reduced |
| Rockefeller Capital Management L.P. | 6,761 | $1.24M | 0.00% | +1,754+35.0% | Added |
| United Capital Financial Advisers, LLC | 6,786 | $1.24M | 0.01% | +531+8.5% | Added |
| New Mexico Educational Retirement Board | 6,824 | $1.25M | 0.04% | 00.0% | Unchanged |
| Ascent Group, LLC | 6,836 | $1.25M | 0.04% | +802+13.3% | Added |
| Bank of Hawaii | 6,839 | $1.25M | 0.07% | +172+2.6% | Added |
| Brown Advisory Inc | 6,844 | $1.25M | 0.00% | −347−4.8% | Reduced |
| Summit Trail Advisors, LLC | 6,886 | $1.26M | 0.02% | +1,485+27.5% | Added |
| Laird Norton Trust Company, LLC | 6,899 | $1.26M | 0.03% | +79+1.2% | Added |
| Stableford Capital II LLC | 6,904 | $1.27M | 0.47% | −10−0.1% | Reduced |
| Kennondale Capital Management LLC | 6,967 | $1.28M | 0.92% | +4,207+152.4% | Added |
| Assenagon Asset Management S.A. | 6,969 | $1.28M | 0.00% | +769+12.4% | Added |
| Canada Post Corp Registered Pension Plan | 6,973 | $1.28M | 0.05% | −1,000−12.5% | Reduced |
| Stoneridge Investment Partners LLC | 7,029 | $1.29M | 0.93% | −7,087−50.2% | Reduced |
| Northwestern Mutual Wealth Management Co | 7,046 | $1.29M | 0.00% | +462+7.0% | Added |
| Commerce Bank | 7,074 | $1.30M | 0.01% | +696+10.9% | Added |
| Maryland State Retirement & Pension System | 7,095 | $1.30M | 0.03% | −286−3.9% | Reduced |
| Generali Investments, Management Co LLC | 7,112 | $1.30M | 0.30% | −3,862−35.2% | Reduced |
| Citizens & Northern Corp | 7,137 | $1.31M | 0.33% | +225+3.3% | Added |
| Jupiter Asset Management Ltd | 7,141 | $1.31M | 0.01% | +7,141 | New |
| Sigma Planning Corp | 7,201 | $1.32M | 0.04% | +1,955+37.3% | Added |
| Whittier Trust Co of Nevada Inc | 7,723 | $1.33M | 0.03% | +15+0.2% | Added |
| Krilogy Financial LLC | 7,590 | $1.34M | 0.04% | −116−1.5% | Reduced |
| GF Fund Management Co. Ltd. | 7,293 | $1.34M | 0.02% | +413+6.0% | Added |
| Skopos Labs, Inc. | 7,323 | $1.34M | 0.04% | +1,621+28.4% | Added |
| Allspring Global Investments Holdings, LLC | 7,322 | $1.35M | 0.00% | +36+0.5% | Added |
| Louisiana State Employees Retirement System | 7,500 | $1.37M | 0.02% | 00.0% | Unchanged |
| Integrated Wealth Concepts LLC | 7,616 | $1.40M | 0.01% | +4,890+179.4% | Added |
| Jacobi Capital Management LLC | 7,649 | $1.40M | 0.08% | −187−2.4% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 7,886 | $1.45M | 0.02% | +2,315+41.6% | Added |
| Banque Cantonale Vaudoise | 7,928 | $1.45M | 0.05% | +4,466+129.0% | Added |
| Cairn Investment Group, Inc. | 8,043 | $1.48M | 0.73% | −53−0.7% | Reduced |
| Brighton Jones LLC | 8,051 | $1.48M | 0.03% | +8,051 | New |
| Quadrant Capital Group LLC | 8,168 | $1.50M | 0.04% | −496−5.7% | Reduced |
| AG2R la Mondiale Gestion D'Actifs | 8,375 | $1.54M | 0.07% | +111+1.3% | Added |
| Hartford Investment Management Co | 8,401 | $1.54M | 0.05% | −100−1.2% | Reduced |
| Brinker Capital Investments, LLC | 8,497 | $1.56M | 0.01% | −2,943−25.7% | Reduced |
| Macquarie Group Ltd | 8,512 | $1.56M | 0.01% | −17,897−67.8% | Reduced |
| M&G Plc | 8,593 | $1.57M | 0.01% | 00.0% | Unchanged |
| Groupama Asset Managment | 8,753 | $1.60M | 0.02% | +322+3.8% | Added |
| Sompo Asset Management Co., Ltd. | 8,776 | $1.61M | 0.30% | +1,200+15.8% | Added |
| Keybank National Association | 8,834 | $1.62M | 0.01% | +416+4.9% | Added |
| Auxier Asset Management | 8,869 | $1.63M | 0.23% | −42−0.5% | Reduced |
| Mizuho Securities USA LLC | 8,872 | $1.63M | 0.04% | −1,810−16.9% | Reduced |
| Buckingham Strategic Partners | 9,011 | $1.65M | 0.02% | +1,506+20.1% | Added |
| Farringdon Capital, Ltd. | 9,054 | $1.66M | 0.36% | +9,054 | New |
| Abacus Wealth Partners, LLC | 9,153 | $1.68M | 0.15% | +385+4.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 9,220 | $1.69M | 0.00% | −33,522−78.4% | Reduced |
| Norinchukin Bank, The | 9,220 | $1.69M | 0.02% | +34+0.4% | Added |
| AIA Group Ltd | 9,329 | $1.71M | 0.02% | +7,054+310.1% | Added |
| Two Sigma Investments, LP | 9,444 | $1.73M | 0.00% | −242,319−96.2% | Reduced |
| Great Lakes Advisors, LLC | 9,490 | $1.74M | 0.01% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 9,715 | $1.78M | 0.00% | −4,272−30.5% | Reduced |
| Bokf, NA | 9,719 | $1.78M | 0.03% | −5,149−34.6% | Reduced |
| Kennedy Capital Management, Inc. | 9,808 | $1.80M | 0.04% | +805+8.9% | Added |
| Thor Investment Management Inc | 9,921 | $1.82M | 0.97% | +1,607+19.3% | Added |
| Pinnacle Financial Partners, Inc. | 9,925 | $1.82M | 0.01% | −984−9.0% | Reduced |
| Sequoia Financial Advisors, LLC | 9,953 | $1.82M | 0.01% | −611−5.8% | Reduced |
| Crossmark Global Holdings, Inc. | 9,961 | $1.83M | 0.03% | −133−1.3% | Reduced |
| K.J. Harrison & Partners Inc | 10,000 | $1.83M | 0.30% | 00.0% | Unchanged |
| GFS Advisors, LLC | 23,915 | $1.86M | 0.13% | +23,915 | New |
| Graham Capital Management, L.P. | 10,342 | $1.90M | 0.06% | +10,342 | New |
| Missouri Trust & Investment Co | 10,380 | $1.90M | 0.56% | +1,890+22.3% | Added |
| Jane Street Group, LLC | 10,469 | $1.92M | 0.00% | −13,070−55.5% | Reduced |
| Investment Management Corp of Ontario | 10,534 | $1.93M | 0.02% | −1,808−14.6% | Reduced |
| PensionDanmark Pensionsforsikringsaktieselskab | 10,994 | $2.02M | 0.02% | +1,832+20.0% | Added |
| ADAR1 Capital Management, LLC | 11,000 | $2.02M | 0.12% | −13,300−54.7% | Reduced |
| MML Investors Services, LLC | 11,340 | $2.08M | 0.01% | +3,115+37.9% | Added |
| Merit Financial Group, LLC | 11,430 | $2.10M | 0.02% | +913+8.7% | Added |
| Teachers Retirement System of the State of Kentucky | 11,437 | $2.10M | 0.02% | 00.0% | Unchanged |
| Gulf International Bank (UK) Ltd | 11,440 | $2.10M | 0.05% | +3,539+44.8% | Added |
| Truist Financial Corp | 11,566 | $2.12M | 0.00% | +159+1.4% | Added |
| Neuberger Berman Group LLC | 11,651 | $2.14M | 0.00% | +247+2.2% | Added |
| Glenmede Trust Co NA | 11,652 | $2.14M | 0.01% | +1,733+17.5% | Added |
| Public Employees Retirement Association of Colorado | 11,669 | $2.14M | 0.01% | 00.0% | Unchanged |
| Profund Advisors LLC | 11,961 | $2.19M | 0.08% | −2,239−15.8% | Reduced |
| Pallas Capital Advisors LLC | 11,963 | $2.19M | 0.08% | +180+1.5% | Added |
| Catalyst Funds Management Pty Ltd | 11,970 | $2.19M | 0.37% | +570+5.0% | Added |