Position history for PRIMECAP MANAGEMENT CO/CA/'s holdings in BIOGEN INC
PRIMECAP MANAGEMENT CO/CA/ holds 14.8M shares of BIIB (BIOGEN INC), worth $2.7B as of 2026-Q1. The position was decreased. BIIB represents 2.1% of PRIMECAP MANAGEMENT CO/CA/'s portfolio.
Current Value
$2.7B
Current Shares
14.8M
Total Value Change
-$1.1B
Total Shares Change
-1.6M
Other major holders of BIIB: UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Decreased |
| 14.8M |
0.0% |
| $2.7B |
| 2.1% |
| $184.02 |
0 |
| 2025-Q4 | Decreased | 14.8M | -1.3% | $2.6B | 2.0% | $176.40 | 0 |
| 2025-Q3 | Decreased | 15M | -5.4% | $2.1B | 1.6% | $138.52 | 0 |
| 2025-Q2 | Decreased | 15.8M | -0.9% | $2B | 1.6% | $126.08 | 0 |
| 2025-Q1 | Decreased | 15.9M | -0.6% | $2.2B | 1.8% | $138.37 | 0 |
| 2024-Q4 | Decreased | 16M | -1.6% | $2.5B | 1.9% | $150.19 | 0 |
| 2024-Q3 | Decreased | 16.3M | -0.1% | $3.2B | 2.3% | $194.67 | 0 |
| 2024-Q2 | Increased | 16.3M | +0.7% | $3.8B | 2.7% | $231.82 | 55 |