Amprius Technologies, Inc.
Close on Oct 19, 2026
- Market cap
- $1.09B
- P/E (TTM)
- –
- Dividend yield
- –
About Amprius Technologies
Miscellaneous Electrical Machinery, Equipment & Supplies, SIC 3690
Amprius Technologies, Inc. develops, manufactures, and markets silicon anode lithium-ion batteries primarily designed for mobility applications, including aviation, ground, and marine vehicles. Its commercial product platforms include SiCore and SiMaxx batteries offered in energy, power, and balanced formats. The company's battery cells primarily serve aviation markets, including unmanned aerial systems such as drones and high-altitude pseudo satellites, alongside light electric vehicles. Its customer base includes aerospace and defense organizations such as AALTO Airbus, AeroVironment, BAE Systems, Nokia Drone Networks, and the U.S. Army.
The company operates a manufacturing facility in Fremont, California, and partners with global contract manufacturers, including a South Korean consortium, providing access to over 2.0 gigawatt-hours of annual battery production capacity. It serves customers within the United States as well as international markets, with substantial sales in Europe. Amprius Technologies is headquartered in Fremont, California.
Summary of the business section of Amprius Technologies's latest annual report, written by StockData.
Company profile
Company
- Legal name
- Amprius Technologies, Inc.
- Headquarters
- Fremont, CA
- Address
- 1180 Page Avenue 94538
- Phone
- (800) 425-8803
- Website
- amprius.com
- Employees
- 97, Dec 31, 2025
- Industry
- Miscellaneous Electrical Machinery, Equipment & Supplies
- Incorporated in
- Delaware
- Fiscal year ends
- December 31
- Auditor
- BDO USA, P.C., Houston, Texas
Stock & identifiers
- Ticker
- AMPX
- Other tickers
- AMPX.WT
- Exchange
- NYSE
- IPO date
- Mar 2, 2022
- Shares outstanding
- 146M, Jul 31, 2026
- Public float
- $518.40M, Jun 30, 2025
- Filer category
- <br>Emerging growth company
- SEC CIK
- 1899287
- CUSIP
- 03214Q108
- ISIN
- US03214Q1085
- EIN
- 98-1591811
Executives and directors
Officers and directors who filed ownership reports (Forms 3, 4, 5) in the last two years
| Name | Position | Shares owned |
|---|---|---|
| Thomas M. Stepien | Chief Executive Officer, Director | 616,010 |
| Constantin Ionel Stefan | Chief Technology Officer | 771,629 |
| Ricardo C. Rodriguez | Chief Financial Officer | 350,000 |
| Sandra Wallach | Chief Financial Officer | 1,005,275 |
| Jonathan Bornstein | President of Amprius Lab | 1,485,025 |
| Kang Sun | Director | 1,274,803 |
| Donald R. Dixon | Director | 802,601 |
| Steven Chu | Director | 137,762 |
| Kathleen A. Bayless | Director | 216,120 |
| Livingston Satterthwaite | Director | 346,506 |
| Wen Hsuan HSIEH | Director | 3,993,689 |
Employees
Headcount reported in annual reports
“As of December 31, 2025, our total headcount was 109 , which consisted of 97 full-time employees and 12 temporary hires and contractors.”
Corporate history
Events identified from SEC filings