Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga March 23, 2015 at 08:07 AM EDT ImmunoGen, Inc. (NASDAQ: IMGN) shares gained 18.28% to $8.80 in the pre-market trading session following the announcement of Takeda ... Read More >> Related Stocks: Immunogen Inc Kamada Ltd Seacoast Banking Corp Takeda Pharma Tenet Healthcare