BlackRock, Inc. 13D and 13G filings for ImmunoGen, 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 |
| 2024-01-25 4:59 pm Purchase | 2023-12-31 | 13G | ImmunoGen, Inc. IMGN | BlackRock Inc. BLK | 21,823,243 8.200% | 3,807,241 (+21.13%) | Filing |
| 2023-02-03 4:27 pm Purchase | 2022-12-31 | 13G | ImmunoGen, Inc. IMGN | BlackRock Inc. BLK | 18,016,002 8.200% | 3,152,698 (+21.21%) | Filing |
| 2022-03-11 2:13 pm Unchanged | 2021-12-31 | 13G | ImmunoGen, Inc. IMGN | BlackRock Inc. BLK | 14,863,304 6.900% | 0 (Unchanged) | Filing |
| 2022-02-08 5:05 pm Sale | 2021-12-31 | 13G | ImmunoGen, Inc. IMGN | BlackRock Inc. BLK | 14,863,304 6.900% | -293,278 (-1.93%) | Filing |
| 2021-01-29 09:57 am Purchase | 2020-12-31 | 13G | ImmunoGen, Inc. IMGN | BlackRock Inc. BLK | 15,156,582 7.800% | 2,974,593 (+24.42%) | Filing |