Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga May 02, 2014 at 08:30 AM EDT Westport Innovations Inc. (NASDAQ: WPRT) shares gained 4.33% to $13.49 in pre-market trading after the company release their Q1 earnings ... Read More >> Related Stocks: Intuitive Surgical Masco Corp Westport Fuel Systems Inc