Amphastar Pharmaceuticals, Inc. Shares Outstanding 2012–2025
Amphastar Pharmaceuticals, Inc. reported 45.6M of shares outstanding for fiscal 2025. That was 4.1% lower than fiscal 2024. Compared with fiscal 2020, the change was -3.9%. A falling share count is consistent with net buybacks exceeding issuance over the period, though the filing should be checked for the components.
| Fiscal year | Shares Outstanding | Change (YoY) |
|---|---|---|
| FY 2025 | 45.6M | -4.1% |
| FY 2024 | 47.6M | -0.9% |
| FY 2023 | 48.1M | -0.1% |
| FY 2022 | 48.1M | +0.8% |
| FY 2021 | 47.7M | +0.5% |
| FY 2020 | 47.5M | +2.0% |
| FY 2019 | 46.6M | -0.1% |
| FY 2018 | 46.6M | +0.0% |
| FY 2017 | 46.6M | +0.8% |
| FY 2016 | 46.2M | +2.3% |
| FY 2015 | 45.2M | +1.2% |
| FY 2014 | 44.6M | +15.2% |
| FY 2013 | 38.8M | — |
| FY 2012 | 0.0M | — |
Source: Amphastar Pharmaceuticals, Inc. SEC filings — balance sheet (10-K), split-adjusted. Computed deterministically; refreshed nightly (last updated August 2, 2026). Open AMPH 10-K filings at SEC EDGAR · Methodology · Download CSV.
How to read this history
Amphastar Pharmaceuticals, Inc. reported 45.6M of shares outstanding for fiscal 2025. That was 4.1% lower than fiscal 2024. Compared with fiscal 2020, the change was -3.9%. A falling share count is consistent with net buybacks exceeding issuance over the period, though the filing should be checked for the components. Values remain missing when the cached filing does not disclose a comparable line item; they are never estimated. Stock splits, reorganizations and fiscal-calendar changes can reduce comparability.
Prepared and reviewed by the stockportfolio.pro research desk. Corrections: support@stockportfolio.pro.
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What is Amphastar Pharmaceuticals, Inc.'s shares outstanding?
Amphastar Pharmaceuticals, Inc. (AMPH) reported shares outstanding of 45.6M for fiscal year 2025, per its SEC filings.
Where does this data come from?
Figures are computed from Amphastar Pharmaceuticals, Inc.'s official SEC filings (balance sheet (10-K), split-adjusted), refreshed nightly. Not investment advice.
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