Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga May 05, 2015 at 08:21 AM EDT Qualys Inc (NASDAQ: QLYS) fell 23.93 percent to $41.90 in pre-market trading after the company issued a downbeat outlook for the ... Read More >> Related Stocks: Acelrx Pharmaceutica Cyberark Soft Ord Endurance Int Group Genworth Financial Qualys Inc