Benzinga's Top #PreMarket Gainers

Westport Innovations Inc. WPRT shares gained 4.33% to $13.49 in pre-market trading after the company announced Q1 earnings results. Avanir Pharmaceuticals, Inc. AVNR soared 3.87% to $4.83 in the pre-market trading after dropping 6.63% on Thursday. Intuitive Surgical ISRG shares jumped 3.03% to $370.00 in pre-market trading after the company announced accelerated share repurchase, this morning. Masco Corporation MAS surged 2.19% to $20.54 in the pre-market session after Raymond James upgraded the stock to Strong Buy.