PKI - Gabelli likes TetraPhase Pharma in premarket analyst action October, 31 2019 08:37 AM PerkinElmer Inc. Amarin (NASDAQ:AMRN) initiated with with Buy rating at Aegis. Shares up 1% premarket.More news on: Tetraphase Pharmaceuticals, Inc., PerkinElmer, Inc., Amarin Corporation plc, Healthcare stocks news, Stocks on the move, , Read more ...