Item 8.01 - Other Events

On October 12, 2020, ImmunoGen, Inc. (the "Company") issued a press release relating to sales made by the Company under its Open Market Sale AgreementSM dated as of September 25, 2020 with Jefferies LLC, as sales agent. The Company's press release is attached as Exhibit 99.1 to this current report and is incorporated herein by reference.

Item 9.01 - Financial Statement and Exhibits





(d) Exhibits



Exhibit No.      Description

99.1               Press release of ImmunoGen, Inc. dated October 12, 2020

104              Cover Page Interactive Data File (formatted in Inline XBRL and
                 contained in Exhibit 101)

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