Who owns BIIB
975 institutions reported holding BIIB for 2026Q1, together 90% of the company, more than the 974 a quarter earlier.
975
Institutions reporting a position · as of 2026Q1 · up from 974 the quarter before
- Shares held by institutions
- 133.4M
Shares held by institutions · 90% of the company · long US equity positions only, as reported on Form 13F
- Reported value
- $24.4B
Reported value · at 2026-03-31 prices, not today's
- Top 5 holders
- 46%
Top 5 holders · of the whole company, between five filers
Details›
- Reporting quarter2026-03-31
- 2026Q1
- Quarters on record
- 52
- New positions
- 123
- Positions exited
- 128
- Added to
- 356
- Reduced
- 262
- Top 10 holdersof the company
- 55%
| Quarter | Filers | Shares | Reported value |
|---|---|---|---|
| 2026Q1 | 975 | 133.4M | $24.4B |
| 2025Q4 | 974 | 138.9M | $24.5B |
| 2025Q3 | 890 | 131.1M | $18.4B |
| 2025Q2 | 852 | 129.9M | $16.3B |
| 2025Q1 | 863 | 129.7M | $17.7B |
| 2024Q4 | 858 | 132.2M | $20.2B |
| 2024Q3 | 900 | 129.8M | $25.0B |
| 2024Q2 | 928 | 128.6M | $29.8B |
| 2024Q1 | 937 | 129.3M | $27.9B |
| 2023Q4 | 985 | 128.2M | $33.2B |
| 2023Q3 | 950 | 124.5M | $32.0B |
| 2023Q2 | 991 | 126.1M | $35.9B |
| 2023Q1 | 990 | 127.6M | $34.8B |
| 2022Q4 | 1,022 | 124.6M | $34.8B |
| 2022Q3 | 976 | 123.6M | $33.2B |
| 2022Q2 | 915 | 121.7M | $25.1B |
| Holder | Shares | % of company | Value |
|---|---|---|---|
| VANGUARD GROUP INC | 17.6M | 12% | $3.23B |
| BlackRock Inc. | 16.0M | 11% | $2.93B |
| PRIMECAP MANAGEMENT CO/CA/ | 14.8M | 9.9% | $2.71B |
| FMR LLC | 12.8M | 8.6% | $2.35B |
| STATE STREET CORP | 7.2M | 4.8% | $1.31B |
| GEODE CAPITAL MANAGEMENT LLC | 4.3M | 2.9% | $793M |
| WELLINGTON MANAGEMENT GROUP LLP | 3.0M | 2.0% | $543M |
| MORGAN STANLEY | 2.2M | 1.5% | $398M |
| JPMORGAN CHASE & CO | 2.0M | 1.4% | $378M |
| AQR CAPITAL MANAGEMENT LLC | 1.9M | 1.3% | $346M |
SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.
reading the register…
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