Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga August 24, 2015 at 08:18 AM EDT Vital Therapies Inc (NASDAQ: VTL) shares tumbled 80.20 percent to $3.50 in pre-market trading after the company reported that topline ... Read More >> Related Stocks: Gopro Inc Cl A Netflix Softbank Corp ADR Vital Therapies Inc Yahoo