Weighted-Average Shares Outstanding (Diluted): The number of shares held by shareholders including insiders but not including a company's treasury shares assuming conversion of all convertible debt, securities, warrants and options, sourced from the company 10-K or 10-Q SEC reports.

Amphastar Pharmaceuticals, Inc. (AMPH) had Weighted-Average Shares Outstanding (Diluted) of 49.89M for the most recently reported fiscal quarter, ending 2025-03-31.