RA Capital Management, L.P. 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 |
| 2024-02-14 5:01 pm Purchase | 2023-12-31 | 13G | ImmunoGen, Inc. IMGN | RA Capital Management, L.P. | 26,916,027 9.990% | 4,840,869 (+21.93%) | Filing |
| 2023-02-14 4:45 pm Sale | 2022-12-31 | 13G | ImmunoGen, Inc. IMGN | RA Capital Management, L.P. | 22,075,158 9.990% | -87,800 (-0.40%) | Filing |
| 2022-02-14 4:11 pm Purchase | 2021-12-31 | 13G | ImmunoGen, Inc. IMGN | RA Capital Management, L.P. | 22,162,958 9.990% | 3,745,500 (+20.34%) | Filing |
| 2021-02-16 4:39 pm Purchase | 2020-12-31 | 13G | ImmunoGen, Inc. IMGN | RA Capital Management, L.P. | 18,417,458 9.800% | 18,417,458 (New Position) | Filing |