Institutional Owners for BIIB
| Institution | Class | Position | Value | Shares | Portfolio Percentage (%) | Previous Percentage (%) | Shares Delta | Shares Delta (%) | Period of Report |
|---|---|---|---|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ | COM | 1 | $4,564,970,779 | 16,025,876 | 0.00 | 0.00 | 24,710 | 0.15 | 06-30-2023 |
| VANGUARD GROUP INC | COM | 2 | $3,728,184,783 | 14,407,330 | 0.00 | 0.00 | 2,210,894 | 18.13 | 12-31-2023 |
| BLACKROCK INC | COM | 3 | $3,686,607,689 | 14,246,658 | 0.00 | 0.00 | 272,071 | 1.95 | 12-31-2023 |
| STATE STREET CORP | COM | 4 | $1,961,253,493 | 6,885,215 | 0.00 | 0.00 | 76,941 | 1.13 | 06-30-2023 |
