Benzinga's Top #PreMarket Gainers

Enanta Pharmaceuticals, Inc. ENTA shares gained 13.69% to $53.00 in the pre-market trading session after the company announced that the FDA has approved AbbVie's ABBV Viekira Pak. Achillion Pharmaceuticals, Inc. ACHN shares jumped 13.09% to $16.07 on positive ACH-3102 and ACH-3422 data. TGC Industries Inc. TGE shares rose 12.81% to $2.29 in pre-market trading after dropping 3.79% on Friday. Caesars Entertainment Corporation CZR shares surged 9.71% to $14.80 in pre-market trading after the company announced its plans to acquire Caesars Acquisition Company CACQ in a stock-for-stock deal. BioCryst Pharmaceuticals, Inc. BCRX shares jumped 6.18% to $11.85 in pre-market trading. BioCryst Pharm received the FDA approval for the treatment of acute uncomplicated influenza.