Amphastar Pharmaceuticals, Inc. SEC filings AMPH
Amphastar Pharmaceuticals, Inc. has 957 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 Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Nov 19, 2021 | — |
| CORRESP | Letter to the SEC | Nov 17, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 15, 2021 | — |
| EFFECT | Filing | Nov 20, 2018 | — |
| CORRESP | Letter to the SEC | Nov 16, 2018 | — |
| UPLOAD | Letter from the SEC | Nov 15, 2018 | — |
| CT ORDER | Filing | Apr 26, 2017 | — |
| UPLOAD | Letter from the SEC | Nov 3, 2016 | — |
| CORRESP | Letter to the SEC | Oct 14, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 27, 2016 | — |
| EFFECT | Filing | Jul 17, 2015 | — |
| CORRESP | Letter to the SEC | Jul 14, 2015 | — |
| UPLOAD | Letter from the SEC | Jul 10, 2015 | — |
| CT ORDER | Filing | Jan 13, 2015 | — |
| CT ORDER | Filing | Jun 25, 2014 | — |
| EFFECT | Filing | Jun 24, 2014 | — |
| CORRESP | Letter to the SEC | Jun 19, 2014 | — |
| CORRESP | Letter to the SEC | Jun 19, 2014 | — |
| CERTNAS | Auto-generated paper document | Jun 19, 2014 | — |
| 8-A12B | Filing | Jun 18, 2014 | — |
| CORRESP | Letter to the SEC | Jun 12, 2014 | — |
| CORRESP | Letter to the SEC | Jun 9, 2014 | — |
| CORRESP | Letter to the SEC | Jun 5, 2014 | — |
| UPLOAD | Letter from the SEC | May 30, 2014 | — |
| CORRESP | Letter to the SEC | May 19, 2014 | — |
| DRS/A | Filing | May 14, 2014 | — |
| UPLOAD | Letter from the SEC | Apr 14, 2014 | — |
| DRS/A | Filing | Apr 3, 2014 | — |
| UPLOAD | Letter from the SEC | Feb 19, 2014 | — |
| DRS/A | Filing | Feb 7, 2014 | — |
| UPLOAD | Letter from the SEC | Jan 10, 2014 | — |
| DRS | Filing | Dec 16, 2013 | — |
| DRSLTR | Filing | Dec 13, 2013 | — |
| RW | Filing | Nov 18, 2010 | — |
| REGDEX | Auto-generated paper document | Feb 18, 2005 | — |
Showing 35 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.