Amprius Technologies, Inc. SEC filings AMPX
Amprius Technologies, Inc. has 501 filings in SEC EDGAR's recent list, going back to Dec 15, 2021. Its latest annual report, Form ARS, was filed on Apr 29, 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 Sep 28, 2026 (material agreement). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SC TO-I/A | Filing | Jul 24, 2024 | — |
| EFFECT | Filing | Jul 8, 2024 | — |
| SC TO-I/A | Filing | Jul 3, 2024 | — |
| SC TO-I | Filing | Jun 24, 2024 | — |
| SC TO-I/A | Filing | Jun 13, 2024 | — |
| SC TO-I/A | Filing | Jun 12, 2024 | — |
| SC TO-I/A | Filing | Jun 4, 2024 | — |
| CORRESP | Letter to the SEC | Jun 3, 2024 | — |
| UPLOAD | Letter from the SEC | May 22, 2024 | — |
| SC TO-I | Filing | May 13, 2024 | — |
| EFFECT | Filing | Oct 27, 2023 | — |
| RW | Filing | Oct 27, 2023 | — |
| EFFECT | Filing | Oct 10, 2023 | — |
| EFFECT | Filing | Oct 5, 2023 | — |
| EFFECT | Filing | Oct 5, 2023 | — |
| CORRESP | Letter to the SEC | Oct 5, 2023 | — |
| UPLOAD | Letter from the SEC | Oct 5, 2023 | — |
| EFFECT | Filing | Jun 26, 2023 | — |
| CORRESP | Letter to the SEC | Jun 22, 2023 | — |
| UPLOAD | Letter from the SEC | Jun 14, 2023 | — |
| EFFECT | Filing | Apr 12, 2023 | — |
| UPLOAD | Letter from the SEC | Apr 11, 2023 | — |
| CORRESP | Letter to the SEC | Apr 10, 2023 | — |
| EFFECT | Filing | Apr 7, 2023 | — |
| EFFECT | Filing | Apr 7, 2023 | — |
| EFFECT | Filing | Dec 27, 2022 | — |
| CORRESP | Letter to the SEC | Dec 22, 2022 | — |
| EFFECT | Filing | Dec 2, 2022 | — |
| CORRESP | Letter to the SEC | Dec 2, 2022 | — |
| CORRESP | Letter to the SEC | Nov 29, 2022 | — |
| CORRESP | Letter to the SEC | Nov 29, 2022 | — |
| CORRESP | Letter to the SEC | Nov 16, 2022 | — |
| CORRESP | Letter to the SEC | Nov 16, 2022 | — |
| UPLOAD | Letter from the SEC | Nov 7, 2022 | — |
| CORRESP | Letter to the SEC | Oct 24, 2022 | — |
| CORRESP | Letter to the SEC | Oct 24, 2022 | — |
| UPLOAD | Letter from the SEC | Oct 18, 2022 | — |
| UPLOAD | Letter from the SEC | Oct 18, 2022 | — |
| D | Filing | Oct 5, 2022 | — |
| 25-NSE | Delisting notice | Sep 15, 2022 | — |
| 425 | Filing | Sep 7, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 6, 2022 | — |
| EFFECT | Filing | Sep 1, 2022 | — |
| CORRESP | Letter to the SEC | Aug 30, 2022 | — |
| CORRESP | Letter to the SEC | Aug 22, 2022 | — |
| UPLOAD | Letter from the SEC | Aug 18, 2022 | — |
| 425 | Filing | Aug 10, 2022 | — |
| CORRESP | Letter to the SEC | Aug 9, 2022 | — |
| UPLOAD | Letter from the SEC | Aug 8, 2022 | — |
| 425 | Filing | Aug 2, 2022 | — |
| CORRESP | Letter to the SEC | Jul 25, 2022 | — |
| UPLOAD | Letter from the SEC | Jul 18, 2022 | — |
| 425 | Filing | Jul 12, 2022 | — |
| 425 | Filing | Jun 30, 2022 | — |
| 425 | Filing | Jun 29, 2022 | — |
| 425 | Filing | Jun 23, 2022 | — |
| NT 10-Q | Filing | May 17, 2022 | Mar 31, 2022 |
| 425 | Filing | May 12, 2022 | — |
| CERT | Nyse certification | Mar 2, 2022 | — |
| EFFECT | Filing | Mar 1, 2022 | — |
| 8-A12B | Filing | Mar 1, 2022 | — |
| CORRESP | Letter to the SEC | Feb 25, 2022 | — |
| CORRESP | Letter to the SEC | Feb 25, 2022 | — |
| CORRESP | Letter to the SEC | Feb 11, 2022 | — |
| UPLOAD | Letter from the SEC | Feb 11, 2022 | — |
| CORRESP | Letter to the SEC | Jan 20, 2022 | — |
| UPLOAD | Letter from the SEC | Jan 11, 2022 | — |
| DRS | Filing | Dec 15, 2021 | — |
Showing 68 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
- Miscellaneous Electrical Machinery, Equipment & Supplies (SIC 3690)
- Listed as
- AMPX (NYSE), AMPX-WT (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Fremont, CA
- SEC filer status
- , Emerging growth company
- SEC CIK
- 1899287
- Former names
- Kensington Capital Acquisition Corp. IV (until Sep 14, 2022)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.