As of January 2026 Amphastar Pharmaceuticals has a market cap of $1.34 Billion USD. This makes Amphastar Pharmaceuticals the world's 5488th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Jan 12th, 2026 the market cap of Amphastar Pharmaceuticals was reported to be: