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Feb 14, 2023 04:49PM Form SC 13G/A ImmunoGen, Inc. Filed by: RA CAPITAL MANAGEMENT, L.P.

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Feb 3, 2023 04:33PM Form SC 13G/A ImmunoGen, Inc. Filed by: BlackRock Inc.

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Feb 10, 2022 08:33AM Form SC 13G/A ImmunoGen, Inc. Filed by: VANGUARD GROUP INC

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Feb 10, 2021 11:11AM Form SC 13G/A ImmunoGen, Inc. Filed by: VANGUARD GROUP INC

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Feb 13, 2020 02:59PM Form SC 13G/A ImmunoGen, Inc. Filed by: STATE STREET CORP

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Feb 14, 2019 02:27PM Form SC 13G/A IMMUNOGEN INC Filed by: Clearbridge Investments, LLC

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Feb 14, 2018 11:27AM Form SC 13G/A IMMUNOGEN INC Filed by: Clearbridge Investments, LLC

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