Benzinga's Top #PreMarket Gainers

Ariad Pharmaceuticals ARIA soared 8.09% to $6.95 in the pre-market trading. Ariad shares have dropped 68.43% over the past 52 weeks, while the S&P 500 index has gained 27.45% in the same period. Camtek CAMT) surged 8.10% to $3.87 in the pre-market session. Camtek's PEG ratio is 2.62. Westmoreland Coal Co WLB shares gained 6.88% to $16.00 in the pre-market. Westmoreland's trailing-twelve-month revenue is $659.77 million. Sucampo Pharmaceuticals SCMP shares jumped 4.96% to $9.50 in pre-market trading after the company reported positive results from Phase 2a study of intravenous ion channel activator for lumbar spinal stenosis.