BlackRock, Inc. 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.
| Reported DateTime |
Transaction Date |
Type | Company Symbol |
Filed By Symbol |
Shares Owned % Owned |
Shares Vs. Prev Report | View |
| 2025-04-17 09:35 am Sale |
2025-03-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
12,506,681 8.500% |
-2,140,070 (-14.61%) |
Filing |
| 2024-08-07 4:10 pm Purchase |
2024-07-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
14,646,751 10.100% |
400,431 (+2.81%) |
Filing |
| 2024-01-24 2:27 pm Sale |
2023-12-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
14,246,320 9.800% |
-13,817 (-0.10%) |
Filing |
| 2023-01-24 1:56 pm Purchase |
2022-12-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
14,260,137 9.900% |
523,183 (+3.81%) |
Filing |
| 2022-03-07 2:51 pm Unchanged |
2021-12-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
13,736,954 9.400% |
0 (Unchanged) |
Filing |
| 2022-02-08 5:05 pm Purchase |
2021-12-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
13,736,954 9.400% |
317,353 (+2.36%) |
Filing |
| 2021-01-28 5:56 pm Sale |
2020-12-31 | 13G | Biogen Inc. BIIB |
BLACKROCK INC BLK |
13,419,601 8.700% |
-2,239,040 (-14.30%) |
Filing |