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Catalyst Pharmaceuticals, Inc. (CPRX) has a market cap of $3.83B as of Friday, May 22, 2026. The CPRX market cap is up 20.61% over the past 30 days and has grown 29.90% 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.