Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga May 06, 2015 at 08:14 AM EDT Synageva Biopharma Corp (NASDAQ: GEVA) shares surged 130.99 percent to $221.45 in pre-market trading after Alexion Pharmaceuticals, ... Read More >> Related Stocks: Alexion Pharmaceuticals Herbalife Ltd Moneygram Intl Pitney Bowes Western Union