PRIMECAP MANAGEMENT CO 13D/13G Filings for Biogen Inc. (BIIB)

PRIMECAP MANAGEMENT CO 13D and 13G filings for Biogen Inc.:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Shares have been adjusted for stock splits.
Time period
Reported
DateTime		 Transaction
Date		 Type Company
Symbol		 Filed By
Symbol		 Shares Owned
% Owned		 Shares Vs. Prev Report View
2024-02-12
4:01 pm
Purchase		 2023-12-31 13G Biogen Inc.
BIIB		 PRIMECAP MANAGEMENT CO 16,264,481
11.220%		 563,905increase
(+3.59%)		 Filing
2023-02-09
4:01 pm
Sale		 2022-12-31 13G Biogen Inc.
BIIB		 PRIMECAP MANAGEMENT CO 15,700,576
10.900%		 -56,829decrease
(-0.36%)		 Filing
2022-02-10
12:21 pm
Sale		 2021-12-31 13G Biogen Inc.
BIIB		 PRIMECAP MANAGEMENT CO 15,757,405
10.730%		 -64,661decrease
(-0.41%)		 Filing
2021-02-12
12:02 pm
Sale		 2009-02-28 13G Biogen Inc.
BIIB		 PRIMECAP MANAGEMENT CO 15,822,066
10.280%		 -65,313decrease
(-0.41%)		 Filing
2020-12-09
5:00 pm
Purchase		 2009-02-28 13G Biogen Inc.
BIIB		 PRIMECAP MANAGEMENT CO 15,887,379
10.320%		 697,898increase
(+4.59%)		 Filing