Skip to main content
Amprius Technologies, Inc. logo

Amprius Technologies, Inc. - Investor Relations & Filings

Listed IPO Sep 2022
Ticker · AMPX ISIN · US03214Q1085 US Manufacturing
Open in API
Filings indexed 442 across all filing types
Latest filing 2026-06-17 Declaration of Voting R…
Country US United States of America
Listing US AMPX · 2 venues

About Amprius Technologies, Inc.

https://amprius.com/

Amprius Technologies, Inc. develops and manufactures advanced lithium-ion batteries featuring a proprietary silicon anode technology. This technology enables the production of cells with industry-leading energy and power density, which provides significant performance improvements over conventional graphite-based batteries. The company's batteries are engineered to deliver longer range, higher payloads, and faster charging capabilities. Key markets for these high-performance cells include demanding applications in electric mobility, particularly in the aviation sector (such as drones, Unmanned Aerial Systems, and electric aircraft), as well as electric vehicles and advanced electronics.

Recent filings

Filing Released Lang Actions
8-K
Declaration of Voting Results & Voting Rights Announcements Classification · 95% confidence The document is a Form 8-K current report filed with the SEC, dated June 11, 2026, containing the submission of matters to a vote of security holders during the company's 2026 annual meeting of stockholders. It reports election voting results for directors and ratification of the appointment of the independent auditor. The content clearly corresponds to official results from shareholder votes at an annual general meeting. The document is about the official announcement of voting results and not the annual report or proxy statement itself. Therefore, the filing is best classified under Declaration of Voting Results & Voting Rights Announcements (DVA). The document length is 4258 characters and contains detailed vote counts, supporting this classification with high confidence.
2026-06-17 English
8-K/A
Share Issue/Capital Change Classification · 88% confidence The document is an SEC Form 8-K/A (an amended Current Report) disclosing the closing of warrant exchange agreements and the issuance of 2,726,631 shares of common stock in exchange for public warrants. This is a direct announcement of a new share issuance and resulting capital structure change. It does not present a full report (e.g., financial statements) nor is it a simple regulatory certification; it is specifically announcing equity issuance. Therefore, it fits the "Share Issue/Capital Change" category.
2026-05-19 English
8-K - Amprius Technologies, Inc. (0001899287) (Filer)
Board/Management Information Classification · 95% confidence The document is a Form 8-K Current Report filed with the SEC, dated April 17, 2026. It announces a change in the company's independent registered public accounting firm, specifically the dismissal of BDO USA, P.C. and the engagement of Deloitte & Touche LLP. The content focuses on the change in the certifying accountant and includes a letter from the former auditor. There are no financial statements or detailed audit reports included, only the announcement of the change. This fits the category of Board/Management Information (MANG) as it relates to changes in key company oversight personnel (the auditor). It is not a full audit report (AR) or annual report (10-K), nor is it a regulatory filing of another type. Therefore, the appropriate classification is MANG with high confidence.
2026-04-21 English
SCHEDULE 13G/A - Amprius Technologies, Inc. (0001899287) (Subject)
Major Shareholding Notification
2026-03-26 English
4 - Amprius Technologies, Inc. (0001899287) (Issuer)
Director's Dealing
2026-03-25 English
144 - Amprius Technologies, Inc. (0001899287) (Subject)
Regulatory Filings
2026-03-23 English

Browse filings by year

6 years

Report missing filing

Can't find a specific document? Let us know and we'll add it within 24 hours.

We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.