Benzinga's Top #PreMarket Gainers

Intuitive Surgical

shares surged 13.22% to $444.00 in pre-market trading after the company reported better-than-expected Q2 earnings. Analysts at Raymond James upgraded Intuitive Surgical from Market Perform to Outperform. Eagle Pharmaceuticals

shares jumped 8.65% to $14.20 in pre-market trading after the company announced the FDA approval for malignant hyperthermia with Ryanodex. JAKKS Pacific

shares gained 7.31% to $8.95 in pre-market trading after the company reported a Q2 loss of $0.43 per share on revenue of $124.20 million. Biogen Idec

shares gained 6.69% to $324.00 in pre-market trading after the company reported upbeat Q2 results and lifted its FY14 forecast.