Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga February 23, 2015 at 08:09 AM EST Rigel Pharmaceuticals, Inc. (NASDAQ: RIGL) shares surged 16.08% to $2.96 in pre-market trading after dropping 4.49% on Friday. ... Read More >> Related Stocks: Ballard Power Sys Nationstar Mortgage Holdngs I New Residential Investment Corp Ocwen Financial Corp Rigel Pharmaceuticals Tower Semiconductor