BiogenBIIB
13F holders, Q1 2026 (March 31)1,014holders +13
114new positions
103sold out
7famous investors
$183.28avg. 13F price*
At the end of Q1 2026, 1,014 institutions reported holding Biogen Inc. (BIIB) in their 13F filings, up 13 from Q4 2025. 114 opened new positions and 103 sold out. The largest holders were BlackRock, Inc. ($2.9B), Primecap Management Co. ($2.7B) and FMR LLC ($2.3B). 7 famous investors held it, including Steve Cohen (0.3% of Point72 Asset Management's portfolio), Joel Greenblatt (0.2% of Gotham Asset Management's portfolio) and Cliff Asness (0.2% of AQR Capital Management's portfolio).
- Company
- Biogen Inc.
- Sector
- Health Care
- CUSIP
- 09062X103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 114 | $206.8M |
| Exits | 103 | $408.7M |
All 13F filers, Q4 2025 → Q1 2026: 9,958,578 shares bought and 12,188,968 shares sold, net −2,230,390 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 1,014 holders
| BlackRock, Inc. | 0.05% | Add +7.8% | 15,974,601 | $2.9B |
| Primecap Management Co. | 2.13% | Reduce 0.0% | 14,757,607 | $2.7B |
| FMR LLC | 0.12% | Add +35.9% | 12,807,541 | $2.3B |
| Vanguard Capital Management LLC | 0.04% | — | 9,537,417 | $1.7B |
| State Street Corp. | 0.05% | Add +0.1% | 7,167,922 | $1.3B |
| Vanguard Portfolio Management LLC | 0.06% | — | 6,531,727 | $1.2B |
| Geode Capital Management, LLC | 0.05% | Add +3.4% | 4,342,602 | $793.4M |
| Wellington Management Group LLP | 0.10% | Reduce -16.6% | 2,961,641 | $543.0M |
| Morgan Stanley | 0.02% | Reduce -6.6% | 2,170,940 | $398.0M |
| JPMorgan Chase & Co. | 0.03% | Add +8.6% | 2,016,009 | $378.1M |
| AQR Capital Management | 0.16% | Add +25.8% | 1,923,557 | $346.2M |
| Invesco Ltd. | 0.03% | Add +5.4% | 1,745,255 | $320.0M |
| Boston Partners | 0.33% | Reduce -1.2% | 1,700,078 | $311.7M |
| Northern Trust Corp. | 0.04% | Add +0.0% | 1,446,579 | $265.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.05% | Reduce -1.0% | 1,377,568 | $252.5M |
| Legal & General Group Plc | 0.06% | Reduce -7.5% | 1,349,832 | $247.5M |
| T. Rowe Price Investment Management, Inc. | 0.15% | Reduce -0.8% | 1,160,989 | $212.8M |
| Bank of America Corp. | 0.02% | Add +2.4% | 1,156,369 | $212.0M |
| Charles Schwab Investment Management Inc. | 0.03% | Add +0.5% | 1,149,394 | $210.7M |
| Van Eck Associates Corp. | 0.15% | Add +1.3% | 1,079,861 | $198.0M |
| Dimensional Fund Advisors LP | 0.04% | Add +12.3% | 1,079,119 | $197.9M |
| Deutsche Bank AG | 0.06% | Add +11.5% | 1,063,828 | $195.0M |
| Goldman Sachs Group Inc. | 0.03% | Reduce -4.4% | 1,051,094 | $192.7M |
| Pictet Asset Management Holding SA | 0.18% | Reduce -3.6% | 913,328 | $168.3M |
| Vanguard Fiduciary Trust Co. | 0.04% | — | 825,531 | $151.3M |
| Point72 Asset Management | 0.27% | Reduce -71.2% | 809,617 | $148.4M |
| Alyeska Investment Group, L.P. | 0.42% | Reduce -21.4% | 805,050 | $147.6M |
| Amundi | 0.04% | Add +38.1% | 790,827 | $145.0M |
| Bank of New York Mellon Corp | 0.03% | Reduce -2.8% | 788,523 | $144.6M |
| Robeco Institutional Asset Management B.V. | 0.20% | Add +24.9% | 763,174 | $139.9M |
| Fred Alger Management, LLC | 0.59% | Reduce -8.2% | 733,194 | $134.4M |
| Massachusetts Financial Services Co. | 0.04% | Add +1.1% | 720,629 | $133.7M |
| Employees Provident Fund Board | 0.98% | No change | 704,196 | $129.1M |
| First Trust Advisors LP | 0.09% | Add +19.1% | 673,958 | $123.6M |
| T. Rowe Price Associates Inc. | 0.01% | Reduce -15.1% | 672,427 | $123.3M |
| Pacer Advisors, Inc. | 0.35% | Reduce -42.4% | 660,408 | $121.1M |
| Balyasny Asset Management L.P. | 0.25% | Add +6.9% | 650,046 | $119.2M |
| AustralianSuper Pty Ltd | 0.59% | Add +29.2% | 616,193 | $113.0M |
| Artemis Investment Management LLP | 1.11% | Add +152.0% | 571,571 | $104.8M |
| Barclays PLC | 0.04% | Reduce -57.7% | 551,474 | $101.1M |
| Royal Bank of Canada | 0.02% | Reduce -1.9% | 531,377 | $97.4M |
| UBS Group AG | 0.02% | Reduce -18.4% | 523,450 | $96.0M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.21% | Add +15.4% | 522,155 | $95.7M |
| Caisse de depot et placement du Quebec | 0.15% | Reduce -11.9% | 518,694 | $95.1M |
| Citigroup Inc. | 0.06% | Reduce -12.8% | 500,507 | $91.8M |
| BNP Paribas Financial Markets | 0.06% | Reduce -7.3% | 471,068 | $86.4M |
| HSBC Holdings PLC | 0.05% | Reduce -8.0% | 463,652 | $84.6M |
| Swiss National Bank | 0.05% | Add +7.2% | 430,600 | $78.9M |
| National Pension Service | 0.06% | Add +39.8% | 401,667 | $73.6M |
| Candriam S.C.A. | 0.37% | Add +15.5% | 381,768 | $70.0M |
| Patient Capital Management, LLC | 2.60% | Reduce -34.1% | 379,741 | $69.6M |
| Nuveen, LLC | 0.02% | Reduce -4.5% | 358,838 | $65.8M |
| Sumitomo Mitsui Trust Group, Inc. | 0.04% | Reduce -3.9% | 356,291 | $65.3M |
| Vanguard Global Advisers, LLC | 0.03% | — | 343,768 | $63.0M |
| California Public Employees Retirement System | 0.04% | Add +3.0% | 340,903 | $62.5M |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.04% | Add +4.5% | 334,413 | $61.3M |
| LSV Asset Management | 0.13% | Add +5.3% | 333,739 | $61.2M |
| Adage Capital Partners Gp, L.L.C. | 0.09% | Add +13.3% | 333,457 | $61.1M |
| Victory Capital Management Inc. | 0.04% | Add +30.1% | 320,785 | $58.8M |
| Man Group plc | 0.12% | Reduce -6.0% | 318,745 | $58.4M |
| FIL Ltd | 0.05% | Reduce -0.5% | 318,056 | $58.3M |
| Fisher Asset Management | 0.02% | Add +6.6% | 312,618 | $57.3M |
| Gotham Asset Management | 0.17% | Add +7.8% | 298,437 | $54.7M |
| Swedbank AB | 0.06% | Add +25.1% | 289,840 | $53.1M |
| Causeway Capital Management LLC | 0.63% | Reduce -46.1% | 280,783 | $51.5M |
| Rhumbline Advisers | 0.04% | Add +1.4% | 275,438 | $50.5M |
| AEGON ASSET MANAGEMENT UK Plc | 0.63% | Reduce -0.6% | 258,735 | $47.4M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.04% | — | 249,778 | $45.8M |
| Acadian Asset Management LLC | 0.06% | Add +32.6% | 248,489 | $45.5M |
| Thompson Siegel & Walmsley LLC | 0.80% | Add +8.5% | 248,343 | $45.5M |
| KBC Group NV | 0.11% | Add +339.5% | 234,692 | $43.0M |
| Marshall Wace, LLP | 0.05% | Reduce -40.4% | 229,879 | $42.1M |
| Sofinnova Investments, Inc. | 2.11% | New | 229,521 | $42.1M |
| California State Teachers Retirement System | 0.04% | Reduce -2.5% | 220,687 | $40.5M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.05% | Reduce -12.3% | 215,436 | $39.5M |
| Qube Research & Technologies Ltd | 0.06% | New | 212,921 | $39.0M |
| Alliancebernstein L.P. | 0.01% | Add +15.9% | 212,897 | $37.5M |
| Renaissance Technologies | 0.06% | Reduce -49.0% | 203,396 | $37.3M |
| Hudson Bay Capital Management LP | 0.25% | Reduce -9.2% | 201,367 | $36.9M |
| Logos Global Management LP | 1.89% | No change | 200,000 | $36.7M |
| KLP Kapitalforvaltning As | 0.14% | Add +3.9% | 199,177 | $36.5M |
| SG Americas Securities, LLC | 0.04% | Add +6.4% | 195,668 | $35.9M |
| Principal Financial Group Inc. | 0.02% | Add +1.6% | 187,059 | $34.3M |
| Allianz Asset Management GmbH | 0.04% | Reduce -28.1% | 178,049 | $32.6M |
| Prudential Financial Inc. | 0.04% | Reduce -53.6% | 163,887 | $30.0M |
| Ieq Capital, LLC | 0.13% | Add +8.9% | 152,076 | $27.9M |
| ExodusPoint Capital Management, LP | 0.28% | New | 151,993 | $27.9M |
| Aberdeen Group plc | 0.04% | Add +8.1% | 151,144 | $27.7M |
| Letko, Brosseau & Associates Inc. | 0.45% | Add +16.3% | 150,865 | $27.7M |
| Franklin Resources Inc. | 0.01% | Add +2.2% | 144,448 | $26.5M |
| Panagora Asset Management Inc. | 0.10% | Add +4335.4% | 142,065 | $26.0M |
| O'shaughnessy Asset Management, LLC | 0.13% | Add +28.2% | 141,324 | $25.9M |
| Palo Alto Investors LP | 3.95% | Reduce -23.3% | 140,719 | $25.8M |
| Susquehanna International Group, LLP | 0.03% | Reduce -78.8% | 140,299 | $25.7M |
| Citadel Advisors | 0.02% | Add +241.6% | 138,093 | $25.3M |
| Russell Investments Group, Ltd. | 0.03% | Add +14.1% | 135,841 | $25.1M |
| Ameriprise Financial Inc. | 0.01% | Add +0.6% | 132,603 | $24.3M |
| Eurizon Capital SGR S.p.A. | 0.07% | Reduce -1.2% | 129,204 | $23.7M |
| TD Asset Management Inc | 0.02% | Reduce -6.0% | 127,268 | $23.3M |
| Wells Fargo & Company | 0.00% | Add +6.5% | 127,134 | $23.3M |
"% of holder's portfolio" is BIIB's weight in each manager's 13F, not the share of Biogen Inc. the manager owns.