Benzinga's Top #PreMarket Gainers

Neurometrix Inc NURO gained 31.18 percent to $1.220 in pre-market trading as the company reported positive clinical study results for its quell wearable pain relief device. Omeros Corporation OMER shares climbed 21.92 percent to $17.74 in pre-market trading as the company reported additional positive data in its Phase 2 clinical trial of OMS721. National Penn Bancshares NPBC shares rose 17.58 percent to $12.84 in pre-market trading after the company agreed to be acquired by BB&T Corporation BBT for $13.00 per share. Esperion Therapeutics Inc ESPR shares rose 10.59 percent to $83.51 in pre-market trading after surging 14.10 percent on Monday. Trina Solar Limited (ADR) TSL shares rose 7.07 percent to $10.90 in pre-market trading after the company reported stronger-than-expected results for the second quarter.