ImmunoGen, Inc. — DEF 14A

ImmunoGen, Inc. of WALTHAM, MA filed a DEF 14A with the SEC on 1998-10-13. Industry: Pharmaceutical Preparations.

Filing

Filing timeline for this registrant (60)

Showing 12 of 60 filings.

FiledForm
2024-01-29DEFA14A
2024-01-24DEFA14A
2024-01-08DEFA14A
2024-01-02DEFM14A
2023-12-21PREM14A
2023-12-21DEFA14A
2023-11-30DEFA14A
2023-11-30DEFA14A
2023-04-26DEFA14A
2023-04-26DEF 14A
2022-04-26DEFA14A
2022-04-26DEF 14A

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