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 |
|---|---|---|---|---|---|
| Dymon Asia Capital (Singapore) Pte. Ltd. | 15,000 | $2.75M | 0.60% | +15,000 | New |
| Pathstone Holdings, LLC | 14,908 | $2.73M | 0.01% | +1,100+8.0% | Added |
| Avanza Fonder AB | 14,621 | $2.68M | 0.07% | −122−0.8% | Reduced |
| Boothbay Fund Management, LLC | 14,268 | $2.62M | 0.06% | +14,268 | New |
| Horizon Investments, LLC | 14,244 | $2.61M | 0.03% | −3,138−18.1% | Reduced |
| Gabelli Funds LLC | 14,100 | $2.58M | 0.02% | −1,300−8.4% | Reduced |
| Evoke Wealth, LLC | 13,831 | $2.54M | 0.05% | +288+2.1% | Added |
| Vontobel Holding Ltd. | 13,710 | $2.51M | 0.01% | +3,869+39.3% | Added |
| Convergence Investment Partners, LLC | 13,557 | $2.49M | 0.41% | +1,401+11.5% | Added |
| GWM Advisors LLC | 13,031 | $2.39M | 0.01% | −8,017−38.1% | Reduced |
| Blair William & Co | 12,854 | $2.36M | 0.01% | +4,411+52.2% | Added |
| Triglav Skladi, D.O.O. | 12,428 | $2.28M | 0.16% | +298+2.5% | Added |
| Beacon Investment Advisory Services, Inc. | 12,314 | $2.26M | 0.09% | −360−2.8% | Reduced |
| Advisor Group Holdings, Inc. | 12,005 | $2.20M | 0.00% | −2,442−16.9% | Reduced |
| Catalyst Funds Management Pty Ltd | 11,970 | $2.19M | 0.37% | +570+5.0% | Added |
| Pallas Capital Advisors LLC | 11,963 | $2.19M | 0.08% | +180+1.5% | Added |
| Profund Advisors LLC | 11,961 | $2.19M | 0.08% | −2,239−15.8% | Reduced |
| Public Employees Retirement Association of Colorado | 11,669 | $2.14M | 0.01% | 00.0% | Unchanged |
| Glenmede Trust Co NA | 11,652 | $2.14M | 0.01% | +1,733+17.5% | Added |
| Neuberger Berman Group LLC | 11,651 | $2.14M | 0.00% | +247+2.2% | Added |
| Truist Financial Corp | 11,566 | $2.12M | 0.00% | +159+1.4% | 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 |
| Merit Financial Group, LLC | 11,430 | $2.10M | 0.02% | +913+8.7% | Added |
| MML Investors Services, LLC | 11,340 | $2.08M | 0.01% | +3,115+37.9% | Added |
| ADAR1 Capital Management, LLC | 11,000 | $2.02M | 0.12% | −13,300−54.7% | Reduced |
| PensionDanmark Pensionsforsikringsaktieselskab | 10,994 | $2.02M | 0.02% | +1,832+20.0% | Added |
| Investment Management Corp of Ontario | 10,534 | $1.93M | 0.02% | −1,808−14.6% | Reduced |
| Jane Street Group, LLC | 10,469 | $1.92M | 0.00% | −13,070−55.5% | Reduced |
| Missouri Trust & Investment Co | 10,380 | $1.90M | 0.56% | +1,890+22.3% | Added |
| Graham Capital Management, L.P. | 10,342 | $1.90M | 0.06% | +10,342 | New |
| GFS Advisors, LLC | 23,915 | $1.86M | 0.13% | +23,915 | New |
| K.J. Harrison & Partners Inc | 10,000 | $1.83M | 0.30% | 00.0% | Unchanged |
| Crossmark Global Holdings, Inc. | 9,961 | $1.83M | 0.03% | −133−1.3% | Reduced |
| Sequoia Financial Advisors, LLC | 9,953 | $1.82M | 0.01% | −611−5.8% | Reduced |
| Pinnacle Financial Partners, Inc. | 9,925 | $1.82M | 0.01% | −984−9.0% | Reduced |
| Thor Investment Management Inc | 9,921 | $1.82M | 0.97% | +1,607+19.3% | Added |
| Kennedy Capital Management, Inc. | 9,808 | $1.80M | 0.04% | +805+8.9% | Added |
| Bokf, NA | 9,719 | $1.78M | 0.03% | −5,149−34.6% | Reduced |
| Thrivent Financial for Lutherans | 9,715 | $1.78M | 0.00% | −4,272−30.5% | Reduced |
| Great Lakes Advisors, LLC | 9,490 | $1.74M | 0.01% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 9,444 | $1.73M | 0.00% | −242,319−96.2% | Reduced |
| AIA Group Ltd | 9,329 | $1.71M | 0.02% | +7,054+310.1% | 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 |
| Abacus Wealth Partners, LLC | 9,153 | $1.68M | 0.15% | +385+4.4% | Added |
| Farringdon Capital, Ltd. | 9,054 | $1.66M | 0.36% | +9,054 | New |
| Buckingham Strategic Partners | 9,011 | $1.65M | 0.02% | +1,506+20.1% | Added |
| Mizuho Securities USA LLC | 8,872 | $1.63M | 0.04% | −1,810−16.9% | Reduced |
| Auxier Asset Management | 8,869 | $1.63M | 0.23% | −42−0.5% | Reduced |
| Keybank National Association | 8,834 | $1.62M | 0.01% | +416+4.9% | Added |
| Sompo Asset Management Co., Ltd. | 8,776 | $1.61M | 0.30% | +1,200+15.8% | Added |
| Groupama Asset Managment | 8,753 | $1.60M | 0.02% | +322+3.8% | Added |
| M&G Plc | 8,593 | $1.57M | 0.01% | 00.0% | Unchanged |
| Macquarie Group Ltd | 8,512 | $1.56M | 0.01% | −17,897−67.8% | Reduced |
| Brinker Capital Investments, LLC | 8,497 | $1.56M | 0.01% | −2,943−25.7% | Reduced |
| Hartford Investment Management Co | 8,401 | $1.54M | 0.05% | −100−1.2% | Reduced |
| AG2R la Mondiale Gestion D'Actifs | 8,375 | $1.54M | 0.07% | +111+1.3% | Added |
| Quadrant Capital Group LLC | 8,168 | $1.50M | 0.04% | −496−5.7% | Reduced |
| Brighton Jones LLC | 8,051 | $1.48M | 0.03% | +8,051 | New |
| Cairn Investment Group, Inc. | 8,043 | $1.48M | 0.73% | −53−0.7% | Reduced |
| Banque Cantonale Vaudoise | 7,928 | $1.45M | 0.05% | +4,466+129.0% | Added |
| BI Asset Management Fondsmaeglerselskab A/S | 7,886 | $1.45M | 0.02% | +2,315+41.6% | Added |
| Jacobi Capital Management LLC | 7,649 | $1.40M | 0.08% | −187−2.4% | Reduced |
| Integrated Wealth Concepts LLC | 7,616 | $1.40M | 0.01% | +4,890+179.4% | Added |
| Louisiana State Employees Retirement System | 7,500 | $1.37M | 0.02% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 7,322 | $1.35M | 0.00% | +36+0.5% | Added |
| Skopos Labs, Inc. | 7,323 | $1.34M | 0.04% | +1,621+28.4% | Added |
| GF Fund Management Co. Ltd. | 7,293 | $1.34M | 0.02% | +413+6.0% | Added |
| Krilogy Financial LLC | 7,590 | $1.34M | 0.04% | −116−1.5% | Reduced |
| Whittier Trust Co of Nevada Inc | 7,723 | $1.33M | 0.03% | +15+0.2% | Added |
| Sigma Planning Corp | 7,201 | $1.32M | 0.04% | +1,955+37.3% | Added |
| Jupiter Asset Management Ltd | 7,141 | $1.31M | 0.01% | +7,141 | New |
| Citizens & Northern Corp | 7,137 | $1.31M | 0.33% | +225+3.3% | Added |
| Generali Investments, Management Co LLC | 7,112 | $1.30M | 0.30% | −3,862−35.2% | Reduced |
| Maryland State Retirement & Pension System | 7,095 | $1.30M | 0.03% | −286−3.9% | Reduced |
| Commerce Bank | 7,074 | $1.30M | 0.01% | +696+10.9% | Added |
| Northwestern Mutual Wealth Management Co | 7,046 | $1.29M | 0.00% | +462+7.0% | Added |
| Stoneridge Investment Partners LLC | 7,029 | $1.29M | 0.93% | −7,087−50.2% | Reduced |
| Canada Post Corp Registered Pension Plan | 6,973 | $1.28M | 0.05% | −1,000−12.5% | Reduced |
| Assenagon Asset Management S.A. | 6,969 | $1.28M | 0.00% | +769+12.4% | Added |
| Kennondale Capital Management LLC | 6,967 | $1.28M | 0.92% | +4,207+152.4% | Added |
| Stableford Capital II LLC | 6,904 | $1.27M | 0.47% | −10−0.1% | Reduced |
| Laird Norton Trust Company, LLC | 6,899 | $1.26M | 0.03% | +79+1.2% | Added |
| Summit Trail Advisors, LLC | 6,886 | $1.26M | 0.02% | +1,485+27.5% | Added |
| Brown Advisory Inc | 6,844 | $1.25M | 0.00% | −347−4.8% | Reduced |
| Bank of Hawaii | 6,839 | $1.25M | 0.07% | +172+2.6% | Added |
| Ascent Group, LLC | 6,836 | $1.25M | 0.04% | +802+13.3% | Added |
| New Mexico Educational Retirement Board | 6,824 | $1.25M | 0.04% | 00.0% | Unchanged |
| United Capital Financial Advisers, LLC | 6,786 | $1.24M | 0.01% | +531+8.5% | Added |
| Rockefeller Capital Management L.P. | 6,761 | $1.24M | 0.00% | +1,754+35.0% | Added |
| North Dakota State Investment Board | 6,670 | $1.22M | 0.05% | −905−11.9% | Reduced |
| Osmosis Investment Management UK Ltd | 6,652 | $1.22M | 0.03% | +17+0.3% | Added |
| Kathmere Capital Management, LLC | 6,643 | $1.22M | 0.08% | +1,852+38.7% | Added |
| Nicolet Bankshares Inc | 6,516 | $1.20M | 0.04% | +4,347+200.4% | Added |
| Callan Family Office, LLC | 6,499 | $1.19M | 0.03% | −2,496−27.7% | Reduced |
| Sagewood Asset Management LP | 6,493 | $1.19M | 0.37% | +594+10.1% | Added |
| Savant Capital, LLC | 6,479 | $1.19M | 0.01% | +2,911+81.6% | Added |
| Advisors Asset Management, Inc. | 6,431 | $1.18M | 0.02% | +219+3.5% | Added |
| Tokio Marine Asset Management Co Ltd | 6,428 | $1.18M | 0.04% | +859+15.4% | Added |