Benzinga's Top #PreMarket Gainers

TubeMogul TUBE jumped 36.23% to $12.56 in pre-market trading after the company reported upbeat Q2 results and issued a strong Q3 revenue forecast. Image Sensing Systems ISNS shares gained 21.18% to $4.12 in pre-market trading after jumping 42.86% on Tuesday. Express EXPR shares jumped 10.69% to $16.15 in pre-market trading after the company reported stronger-than-expected second quarter results and raised its FY earnings forecast. The Michaels Companies MIK shares gained 9.64% to $16.60 in pre-market trading after the company reported upbeat fiscal second-quarter results. Aruba Networks ARUN shares climbed 9.54% to $22.17 in pre-market trading on stronger-than-expected quarterly results. UBS upgraded Aruba from Neutral to Buy and raised the price target from $21.00 to $25.00.