IMGN - ImmunoGen (IMGN) Q4 2021 Earnings Call Transcript February, 25 2022 06:00 PM ImmunoGen Inc. Image source: The Motley Fool. ImmunoGen (NASDAQ: IMGN) Q4 2021 Earnings Call Feb 25, 2022 , 8:00 a.m. ET Operator Continue reading For further details see: ImmunoGen (IMGN) Q4 2021 Earnings Call Transcript