Benzinga's Top #PreMarket Gainers

Vertex Pharmaceuticals

shares gained 52.90% to $101.85 in pre-market trading after the company reported that primary endpoint was met for lumacaftor study. xG Technology

shares jumped 50.54% to $2.80 in pre-market trading on the $497 million army contract. Wix.com

shares jumped 5.63% to $18.77 in pre-market trading after the company announced that it had surpassed 50 million registered users worldwide. Dendreon

shares gained 3.47% to $2.09 in pre-market trading after falling 0.98% on Monday.