IMGN - ImmunoGen down 10% premarket on pricing equity offering January, 23 2020 06:16 AM ImmunoGen Inc. ImmunoGen (NASDAQ:IMGN) has priced its public offering of 21,325,000 common shares at $4.25 per share, for expected gross proceeds of $90.6M.More news on: ImmunoGen, Inc., Healthcare stocks news, Stocks on the move, Read more ...