Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga April 07, 2014 at 08:28 AM EDT Questcor Pharmaceuticals (NASDAQ: QCOR) shares gained 31.87% to $89.50 in the pre-market after the company agreed to be bought by ... Read More >> Related Stocks: Agios Pharmaceuticals Zynga Inc Cl A