Benzinga's Top #PreMarket Losers

shares declined 13.92 percent to $56.76 in pre-market trading. Teva Pharmaceutical Industries Ltd (ADR)

announced its plans to buy Allergan PLC's

generic drugs unit for $40.5 billion in a cash and stock deal. Teva also reported that it has dropped its $40 billion cash and stock bid for Mylan.

shares dropped 9.09 percent to $2.30 in pre-market after declining 1.94 percent on Friday.

shares tumbled 8.43 percent to $13.26 in pre-market trading after falling 2.95 percent on Friday.

fell 5.95 percent to $32.58 in pre-market trading after slipping 0.17 percent on Friday.

shares fell 5.89 percent to $42.05 in pre-market trading after dropping 3.29 percent on Friday.