Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga April 24, 2014 at 08:11 AM EDT Zogenix (NASDAQ: ZGNX) shares gained 23.84% to $3.48 in pre-market trading after the company reported sale of SUMAVEL DosePro migraine ... Read More >> Related Stocks: Apple Endo Int'l Plc Zimmer Holdings