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Ballard Power Systems Inc. (BLDP) has a market cap of $1.63B as of Thursday, May 21, 2026. The BLDP market cap is up 80.81% over the past 30 days and has grown 316.45% over the past year. Market capitalization represents the total market value of a company's outstanding shares, calculated by multiplying the stock price by the total number of shares outstanding.