The Vanguard Group 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 |
| 2024-02-13 5:06 pm Purchase | 2023-12-29 | 13G | ImmunoGen, Inc. IMGN | The Vanguard Group | 25,466,950 9.130% | 11,088,515 (+77.12%) | Filing |
| 2023-02-09 11:22 am Sale | 2022-12-30 | 13G | ImmunoGen, Inc. IMGN | The Vanguard Group | 14,378,435 6.510% | -753,317 (-4.98%) | Filing |
| 2022-02-10 08:17 am Purchase | 2021-12-31 | 13G | ImmunoGen, Inc. IMGN | The Vanguard Group | 15,131,752 6.870% | 974,752 (+6.89%) | Filing |
| 2021-02-10 11:03 am Sale | 2020-12-31 | 13G | ImmunoGen, Inc. IMGN | The Vanguard Group | 14,157,000 7.270% | -68,670 (-0.48%) | Filing |