Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga April 25, 2014 at 08:07 AM EDT Ballard Power Systems (NASDAQ: BLDP) shares gained 7.94% to $4.28 in pre-market trading after the company closed a strategic ... Read More >> Related Stocks: Baidu.com SP ADR Ballard Power Sys Microsoft Sunpower Corp United Technologies