Benzinga's Top #PreMarket Gainers

Idenix Pharmaceuticals

shares gained 233.33% to $24.10 in pre-market trading after Merck

announced its plans to acquire Idenix for $24.50 per share in cash. Achillion Pharmaceuticals

shares jumped 35.07% to $3.89 in pre-market trading on news of Merck-Idenix deal. Hittite Microwave

jumped 28.80% to $78.00 in pre-market trading after Analog Devices

announced its plans to buy Hittite Microwave for $78 per share in cash. Family Dollar Stores

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

shares jumped 5.06% to $61.90 in pre-market trading after Tyson Foods

announced it has submitted a unilaterally binding offer to buy Hillshire for $63 per share in cash.