Benzinga's Top #PreMarket Gainers

Idenix Pharmaceuticals IDIX shares gained 233.33% to $24.10 in pre-market trading after Merck MRK announced its plans to acquire Idenix for $24.50 per share in cash. Achillion Pharmaceuticals ACHN shares jumped 35.07% to $3.89 in pre-market trading on news of Merck-Idenix deal. Hittite Microwave HITT jumped 28.80% to $78.00 in pre-market trading after Analog Devices ADI announced its plans to buy Hittite Microwave for $78 per share in cash. Family Dollar Stores FDO soared 11.91% to $67.74 in the pre-market trading after Carl Icahn disclosed a brand-new 9.39% stake in the company. The Hillshire Brands Company HSH shares jumped 5.06% to $61.90 in pre-market trading after Tyson Foods TSN announced it has submitted a unilaterally binding offer to buy Hillshire for $63 per share in cash.