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 |
|---|---|---|---|
| S-3ASR | Automatic shelf registration | Oct 9, 2026 | — |
| S-8 | Employee stock plan registration | Mar 6, 2026 | — |
| S-8 | Employee stock plan registration | Mar 20, 2025 | — |
| 424B7 | Filing | Dec 9, 2024 | — |
| S-8 | Employee stock plan registration | Oct 23, 2024 | — |
| 424B7 | Filing | Oct 23, 2024 | — |
| 424B3 | Prospectus | Jul 8, 2024 | — |
| S-4/A | Filing | Jul 3, 2024 | — |
| S-4 | Registration for a merger or exchange | Jun 24, 2024 | — |
| 424B3 | Prospectus | May 13, 2024 | — |
| 424B3 | Prospectus | May 13, 2024 | — |
| S-8 | Employee stock plan registration | Mar 28, 2024 | — |
| POS AM | Filing | Oct 27, 2023 | — |
| 424B3 | Prospectus | Oct 23, 2023 | — |
| 424B3 | Prospectus | Oct 10, 2023 | — |
| 424B3 | Prospectus | Oct 3, 2023 | — |
| POS AM | Filing | Oct 3, 2023 | — |
| POS AM | Filing | Oct 3, 2023 | — |
| S-3 | Shelf registration | Oct 3, 2023 | — |
| 424B3 | Prospectus | Sep 21, 2023 | — |
| 424B3 | Prospectus | Sep 21, 2023 | — |
| 424B3 | Prospectus | Sep 21, 2023 | — |
| 424B3 | Prospectus | Sep 21, 2023 | — |
| 424B3 | Prospectus | Sep 21, 2023 | — |
| 424B3 | Prospectus | Aug 11, 2023 | — |
| 424B3 | Prospectus | Aug 11, 2023 | — |
| 424B3 | Prospectus | Aug 11, 2023 | — |
| 424B3 | Prospectus | Jul 25, 2023 | — |
| 424B3 | Prospectus | Jul 25, 2023 | — |
| 424B3 | Prospectus | Jul 25, 2023 | — |
| 424B3 | Prospectus | Jun 27, 2023 | — |
| S-4/A | Filing | Jun 21, 2023 | — |
| 424B3 | Prospectus | Jun 15, 2023 | — |
| 424B3 | Prospectus | Jun 15, 2023 | — |
| 424B3 | Prospectus | Jun 15, 2023 | — |
| 424B3 | Prospectus | Jun 9, 2023 | — |
| 424B3 | Prospectus | Jun 9, 2023 | — |
| 424B3 | Prospectus | Jun 9, 2023 | — |
| S-4 | Registration for a merger or exchange | Jun 7, 2023 | — |
| 424B3 | Prospectus | May 12, 2023 | — |
| 424B3 | Prospectus | May 12, 2023 | — |
| 424B3 | Prospectus | May 12, 2023 | — |
| 424B3 | Prospectus | May 10, 2023 | — |
| 424B3 | Prospectus | May 10, 2023 | — |
| 424B3 | Prospectus | May 10, 2023 | — |
| 424B3 | Prospectus | Apr 27, 2023 | — |
| 424B3 | Prospectus | Apr 27, 2023 | — |
| 424B3 | Prospectus | Apr 27, 2023 | — |
| 424B3 | Prospectus | Apr 19, 2023 | — |
| 424B3 | Prospectus | Apr 19, 2023 | — |
| 424B3 | Prospectus | Apr 19, 2023 | — |
| 424B3 | Prospectus | Apr 11, 2023 | — |
| 424B3 | Prospectus | Apr 11, 2023 | — |
| S-4 POS | Filing | Apr 5, 2023 | — |
| S-1 | Registration statement | Apr 5, 2023 | — |
| POS AM | Filing | Apr 5, 2023 | — |
| POS AM | Filing | Apr 5, 2023 | — |
| S-8 | Employee stock plan registration | Mar 31, 2023 | — |
| 424B3 | Prospectus | Mar 23, 2023 | — |
| 424B3 | Prospectus | Mar 23, 2023 | — |
| 424B3 | Prospectus | Mar 23, 2023 | — |
| 424B3 | Prospectus | Mar 9, 2023 | — |
| 424B3 | Prospectus | Mar 9, 2023 | — |
| 424B3 | Prospectus | Mar 9, 2023 | — |
| 424B3 | Prospectus | Feb 7, 2023 | — |
| 424B3 | Prospectus | Feb 7, 2023 | — |
| 424B3 | Prospectus | Feb 7, 2023 | — |
| 424B3 | Prospectus | Jan 12, 2023 | — |
| 424B3 | Prospectus | Jan 12, 2023 | — |
| 424B3 | Prospectus | Jan 12, 2023 | — |
| 424B3 | Prospectus | Dec 27, 2022 | — |
| S-1/A | Amended registration statement | Dec 27, 2022 | — |
| 424B3 | Prospectus | Dec 5, 2022 | — |
| S-1/A | Amended registration statement | Nov 16, 2022 | — |
| S-1/A | Amended registration statement | Nov 16, 2022 | — |
| S-8 | Employee stock plan registration | Nov 16, 2022 | — |
| 424B3 | Prospectus | Nov 16, 2022 | — |
| 424B3 | Prospectus | Nov 14, 2022 | — |
| S-1/A | Amended registration statement | Oct 25, 2022 | — |
| S-1/A | Amended registration statement | Oct 25, 2022 | — |
| 424B3 | Prospectus | Oct 20, 2022 | — |
| S-1 | Registration statement | Sep 30, 2022 | — |
| S-1 | Registration statement | Sep 30, 2022 | — |
| 424B3 | Prospectus | Sep 1, 2022 | — |
| S-4/A | Filing | Aug 22, 2022 | — |
| S-4/A | Filing | Aug 10, 2022 | — |
| S-4/A | Filing | Jul 25, 2022 | — |
| S-4 | Registration for a merger or exchange | Jun 21, 2022 | — |
| 424B4 | Prospectus | Mar 2, 2022 | — |
| S-1/A | Amended registration statement | Feb 23, 2022 | — |
| S-1/A | Amended registration statement | Feb 11, 2022 | — |
| S-1 | Registration statement | Jan 20, 2022 | — |
Showing 92 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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)
Other Miscellaneous Electrical Machinery, Equipment & Supplies companies
- Cae Inc CAE
- EnerSys ENS
- Novanta Inc NOVT
- QuantumScape Corp QS
- Spectrum Brands Holdings, Inc. SPB
- Energizer Holdings, Inc. ENR
- InoBat B.V. INBT
- Fluence Energy, Inc. FLNC
All 55 Miscellaneous Electrical Machinery, Equipment & Supplies companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.