Amphastar Pharmaceuticals, Inc. SEC filings AMPH
Amphastar Pharmaceuticals, Inc. has 954 filings in SEC EDGAR's recent list, going back to Feb 11, 2005. Its latest annual report, Form ARS, was filed on Apr 13, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 6, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEFA14A | Additional proxy material | Apr 13, 2026 | — |
| DEF 14A | Proxy statement | Apr 13, 2026 | Jun 1, 2026 |
| DEFA14A | Additional proxy material | Apr 14, 2025 | — |
| DEF 14A | Proxy statement | Apr 14, 2025 | Jun 2, 2025 |
| PRE 14A | Preliminary proxy statement | Apr 2, 2025 | Jun 2, 2025 |
| DEFA14A | Additional proxy material | Apr 19, 2024 | — |
| DEFA14A | Additional proxy material | Apr 12, 2024 | — |
| DEF 14A | Proxy statement | Apr 12, 2024 | Jun 3, 2024 |
| DEFA14A | Additional proxy material | Apr 14, 2023 | — |
| DEF 14A | Proxy statement | Apr 14, 2023 | — |
| DEFA14A | Additional proxy material | Apr 14, 2022 | — |
| DEF 14A | Proxy statement | Apr 14, 2022 | Jun 10, 2022 |
| DEFA14A | Additional proxy material | May 7, 2021 | — |
| DEFA14A | Additional proxy material | Apr 14, 2021 | — |
| DEF 14A | Proxy statement | Apr 14, 2021 | Jun 7, 2021 |
| DEFA14A | Additional proxy material | Apr 15, 2020 | — |
| DEF 14A | Proxy statement | Apr 15, 2020 | Jun 8, 2020 |
| DEFA14A | Additional proxy material | Apr 18, 2019 | — |
| DEF 14A | Proxy statement | Apr 18, 2019 | Jun 12, 2019 |
| DEFA14A | Additional proxy material | Mar 15, 2019 | — |
| DEFA14A | Additional proxy material | Apr 18, 2018 | — |
| DEF 14A | Proxy statement | Apr 18, 2018 | Jun 7, 2018 |
| DEFA14A | Additional proxy material | Apr 21, 2017 | — |
| DEF 14A | Proxy statement | Apr 21, 2017 | Jun 8, 2017 |
| DEFA14A | Additional proxy material | Apr 22, 2016 | — |
| DEF 14A | Proxy statement | Apr 22, 2016 | Jun 9, 2016 |
| DEFA14A | Additional proxy material | Apr 8, 2015 | — |
| DEF 14A | Proxy statement | Apr 8, 2015 | May 27, 2015 |
Showing 28 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- AMPH (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- Rancho Cucamonga, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1297184
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.