Amprius Technologies, Inc. (AMPX)
NYSE: AMPX · Real-Time Price · USD
19.69
-1.73 (-8.08%)
At close: Apr 28, 2026, 4:00 PM EDT
19.76
+0.07 (0.36%)
After-hours: Apr 28, 2026, 4:14 PM EDT
Company Description
Amprius Technologies, Inc. develops, manufactures, and markets lithium-ion batteries for mobility applications.
The company provides silicon anode lithium-ion batteries under the SiCore and SiMaxx product platforms.
Its batteries are primarily used for existing and emerging aviation applications, including unmanned aerial systems, such as drones and high-altitude pseudo satellites.
The company was founded in 2008 and is headquartered in Fremont, California.
Amprius Technologies, Inc.
| Country | United States |
| Founded | 2008 |
| Industry | Electrical Equipment & Parts |
| Sector | Industrials |
| Employees | 97 |
| CEO | Thomas Stepien |
Contact Details
Address: 1180 Page Avenue Fremont, California 94538 United States | |
| Phone | 800 425 8803 |
| Website | amprius.com |
Stock Details
| Ticker Symbol | AMPX |
| Exchange | NYSE |
| Stock Type | Common Stock |
| Fiscal Year | January - December |
| Reporting Currency | USD |
| CIK Code | 0001899287 |
| CUSIP Number | 03214Q108 |
| ISIN Number | US03214Q1085 |
| Employer ID | 98-1591811 |
| SIC Code | 3690 |
Key Executives
| Name | Position |
|---|---|
| Thomas Michael Stepien | Chief Executive Officer and Board Director |
| Ricardo C. Rodriguez | Chief Financial Officer |
| Dr. Constantin Ionel Stefan | Chief Technology Officer |
| Siyu Jiang | Vice President of Legal Affairs |
| Scott Zafiropoulo | Senior Director of Marketing |
| Ronnie Tao | Vice President of Sales |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Apr 21, 2026 | 8-K | Current Report |
| Apr 1, 2026 | 144 | Filing |
| Mar 26, 2026 | SCHEDULE 13G/A | Filing |
| Mar 23, 2026 | 144 | Filing |
| Mar 12, 2026 | 144 | Filing |
| Mar 12, 2026 | 144 | Filing |
| Mar 10, 2026 | 144 | Filing |
| Mar 6, 2026 | S-8 | Securities to be offered to employees in employee benefit plans |
| Mar 6, 2026 | 10-K | Annual Report |
| Mar 4, 2026 | 8-K | Current Report |