Benzinga's Top #PreMarket Gainers

Camtek

surged 7.54% to $4.42 in the pre-market session. Camtek's PEG ratio is 2.99. Merrimack Pharmaceuticals

shares gained 7.36% to $4.23 in the pre-market. Merrimack's trailing-twelve-month revenue is $54.15 million. Achillion Pharmaceuticals

soared 5.49% to $3.65 in the pre-market trading. Achillion had $139.77 million in total cash for the latest quarter. Ariad Pharmaceuticals

shares jumped 4.74% to $5.08 in pre-market trading. Ariad shares have dropped 78.15% over the past 52 weeks, while the S&P 500 index has gained 28.12% in the same period.