Ballard Announces U.S. Offering Ballard Announces U.S. Offering VANCOUVER, March 21, 2013 /CNW/ - Ballard Power Systems (NASDAQ: BLDP)(TSX: BLD) has announced that it has priced an underwritten offering (the Offering) of 7,275,000 units at a price of U.S. $1.10 per unit, for gross offering proceeds of approximately U.S. $8.0 million.