PRIMECAP MANAGEMENT CO/CA/'s ownership history for BIIB

PRIMECAP MANAGEMENT CO/CA/ currently holds 14.8M shares with a market value of $2.7B. It started holding BIIB on 2024-09-30. At its peak, it held 16.3M shares on 2024-09-30. Its highest holding value was $3.2B on 2024-09-30. At its lowest, it held 14.8M shares on 2026-03-31, with a value of $2.0B on 2025-06-30. In the recent 180 days, PRIMECAP MANAGEMENT CO/CA/ has decreased its shares by 197.1K. In the recent year, PRIMECAP MANAGEMENT CO/CA/ has decreased its shares by 1.2M.