Benzinga's Top #PreMarket Gainers

Zale ZLC surged 39.81% to $20.86 in the pre-market session after Signet Jewelers SIG announced its plans to acquire Zale for $21.00 per share. Signet Jewelers SIG soared 13.19% to $89.75 in the pre-market trading after the company announced its plans to acquire Zale for $21.00 per share. Gogo GOGO shares jumped 2.50% to $20.50 in pre-market trading after analysts at Evercore Partners upgraded the stock from Equal-Weight to Overweight. Herbalife HLF shares gained 1.55% to $70.00 in the pre-market after the company reported upbeat fourth-quarter earnings and lifted its 2014 net income outlook.