Benzinga's Top Pre-Market NASDAQ Gainers

Harbin Electric Inc HRBN shares advanced 8.62% to $18.90 in the pre-market session. HRBN's PEG ratio is 0.47. Clean Energy Fuels Corp CLNE shares advanced 7.82% to $16.26 in the pre-market session. Analysts at Bank of America upgraded CLNE from “underperform” to “buy.” ADTRAN Inc ADTN climbed 6.90% to $42.90 in the pre-market session. ADTN reported a 33% rise in its Q2 operating income. Glu Mobile Inc GLUU jumped 6.73% to $5.55 in the pre-market session. GLUU had no debt for the latest quarter.