As of December 2025 Amphastar Pharmaceuticals has a market cap of C$1.65 Billion. This makes Amphastar Pharmaceuticals the world's 5649th 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 Dec 10th, 2025 the market cap of Amphastar Pharmaceuticals was reported to be: