Benzinga's Top #PreMarket Gainers

Tesla Motors TSLA surged 11.95% to $216.78 in the pre-market session after the company reported better-than-expected fourth-quarter results. Raptor Pharmaceuticals RPTP soared 11.93% to $16.70 in the pre-market trading after the company announced positive clinical results with RP103 in Huntington's disease Phase 2/3 trial. Portfolio Recovery Associates PRAA shares jumped 8.56% to $54.80 in pre-market trading after the company reported Q4 results and agreed to acquire Aktiv Kapital for $880 million. Safeway SWY shares gained 4.59% to $36.20 in the pre-market after the company reported upbeat fourth-quarter earnings.