Benzinga's Top #PreMarket Gainers By: Benzinga via Benzinga April 07, 2015 at 08:14 AM EDT Ballard Power Systems Inc. (NASDAQ: BLDP) shares climbed 11.25% to $2.41 in pre-market trading. Ballard Customer has demonstrated ... Read More >> Related Stocks: Ballard Power Sys Clovis Oncology Inc Greenbrier Companies