Quick Answer
Amphastar Pharmaceuticals, Inc. reported Common Stock Shares Outstanding of 45.65 million shares for the year ending 2025.
- Amphastar Pharmaceuticals, Inc. showed a decrease of -4.1% in Common Stock Shares Outstanding from 2024 to 2025.
- This data is from Amphastar Pharmaceuticals, Inc.'s annual report (Form 10-K), filed with the SEC on February 26, 2026.
- XBRL data for this metric is available from 2013 to 2025 (13 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
- Over the full 13 years of available data (2013 to 2025), Amphastar Pharmaceuticals, Inc.'s Common Stock Shares Outstanding has grown by 17.7%.
- Historical annual values: Fiscal year 2025: 45.65 million shares | Fiscal year 2024: 47.62 million shares | Fiscal year 2023: 48.07 million shares | Fiscal year 2022: 48.11 million shares | Fiscal year 2021: 47.71 million shares | Fiscal year 2020: 47.50 million shares | Fiscal year 2019: 46.58 million shares | Fiscal year 2018: 46.63 million shares | Fiscal year 2017: 46.62 million shares | Fiscal year 2016: 46.25 million shares | Fiscal year 2015: 45.20 million shares | Fiscal year 2014: 44.65 million shares | Fiscal year 2013: 38.77 million shares.
- Data sourced from SEC EDGAR public filings as of June 23, 2026.
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