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 |
|---|---|---|---|
| S-8 | Employee stock plan registration | Feb 29, 2024 | — |
| S-8 | Employee stock plan registration | Mar 1, 2023 | — |
| S-8 | Employee stock plan registration | Mar 11, 2022 | — |
| S-3 | Shelf registration | Nov 9, 2021 | — |
| S-8 | Employee stock plan registration | Mar 15, 2021 | — |
| S-8 | Employee stock plan registration | Mar 16, 2020 | — |
| S-8 | Employee stock plan registration | Mar 15, 2019 | — |
| S-3 | Shelf registration | Nov 9, 2018 | — |
| S-8 | Employee stock plan registration | Mar 14, 2018 | — |
| S-8 | Employee stock plan registration | Mar 15, 2017 | — |
| S-8 | Employee stock plan registration | Mar 15, 2016 | — |
| S-8 | Employee stock plan registration | Jul 2, 2015 | — |
| S-3 | Shelf registration | Jul 2, 2015 | — |
| S-8 | Employee stock plan registration | Mar 26, 2015 | — |
| S-8 | Employee stock plan registration | Jun 26, 2014 | — |
| 424B4 | Prospectus | Jun 25, 2014 | — |
| FWP | Free writing prospectus | Jun 25, 2014 | — |
| S-1MEF | Filing | Jun 25, 2014 | — |
| S-1/A | Amended registration statement | Jun 18, 2014 | — |
| S-1/A | Amended registration statement | Jun 13, 2014 | — |
| S-1/A | Amended registration statement | Jun 5, 2014 | — |
| S-1 | Registration statement | May 20, 2014 | — |
| S-1/A | Amended registration statement | Apr 3, 2006 | — |
| S-1/A | Amended registration statement | Nov 23, 2005 | — |
| S-1/A | Amended registration statement | Oct 27, 2005 | — |
| S-1/A | Amended registration statement | Aug 15, 2005 | — |
| S-1/A | Amended registration statement | Jul 1, 2005 | — |
| S-1/A | Amended registration statement | Jun 23, 2005 | — |
| S-1/A | Amended registration statement | May 13, 2005 | — |
| S-1 | Registration statement | Feb 11, 2005 | — |
Showing 30 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.