Institutional Owners for BIIB
| Institution | Class | Position | Value | Shares | Portfolio Percentage (%) | Previous Percentage (%) | Shares Delta | Shares Delta (%) | Period of Report |
|---|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | COM | 1 | $3,573,074,920 | 16,570,398 | 0.00 | 0.00 | 2,163,068 | 15.01 | 03-31-2024 |
| PRIMECAP MANAGEMENT CO/CA/ | COM | 2 | $4,564,970,779 | 16,025,876 | 0.00 | 0.00 | 24,710 | 0.15 | 06-30-2023 |
| BLACKROCK INC | COM | 3 | $3,050,083,805 | 14,144,988 | 0.00 | 0.00 | -101,670 | -0.71 | 03-31-2024 |
| STATE STREET CORP | COM | 4 | $1,454,857,335 | 6,747,008 | 0.00 | 0.00 | -138,207 | -2.01 | 03-31-2024 |
