Notice of Proposed Sale · 144
Amprius Technologies, Inc.
AMPXNYSEEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- AMPRIUS TECHNOLOGIES, INC.
- Issuer CIK
- 0001899287
- SEC file number
- 001-41314
- Phone
- 800-425-8803
- Person for whose account securities are to be sold
- THOMAS M STEPIEN
- Relationships to issuer
- OFFICER · DIRECTOR
- Street
- 1180 PAGE AVENUE
- City
- FREMONT
- State / country code
- CA
- Postal code
- 94538
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 23,529 | 243,312.64 | 146,080,618 | 08/21/2026 | NYSE | Morgan Stanley Smith Barney LLC |
Broker / market maker — proposed row 1, entry 1
- Name
- Morgan Stanley Smith Barney LLC
- Street
- 1 New York Plaza, 38th fl.
- City
- New York
- State / country code
- NY
- Postal code
- 10004
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 08/20/2026 | Release of restricted stock units | Issuer | 46,875 | N | 08/20/2026 | Compensation |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| Thomas M. Stepien | Common Stock | 05/27/2026 | 4,375 | 75,221.56 |
| Thomas M. Stepien | Common Stock | 06/04/2026 | 2,000 | 41,940 |
| Thomas M. Stepien | Common Stock | 08/24/2026 | 8,000 | 80,240 |
Seller — prior-sale row 1, entry 1
- Name
- Thomas M. Stepien
- Street
- 1180 Page Ave.
- City
- Fremont
- State / country code
- CA
- Postal code
- 94538
Seller — prior-sale row 2, entry 1
- Name
- Thomas M. Stepien
- Street
- 1180 Page Ave.
- City
- Fremont
- State / country code
- CA
- Postal code
- 94538
Seller — prior-sale row 3, entry 1
- Name
- Thomas M. Stepien
- Street
- 1180 Page Ave.
- City
- Fremont
- State / country code
- CA
- Postal code
- 94538
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Remarks
SHARES TO BE SOLD TO COVER WITHHOLDING TAXES UPON VESTING OF RESTRICTED STOCK UNIT AWARDS
Notice signature
- Notice date
- 08/25/2026
- Signed
- /s/ Thomas M. Stepien
Company context
Amprius Technologies, Inc. is a leader in advanced lithium-ion battery technology, delivering high-energy and high-power silicon-anode batteries with up to twice the energy density, range, and flight time of conventional graphite-based cells. Headquartered in Fremont, California, Amprius operates an R&D lab and pilot manufacturing facility for silicon anodes and cells. To support scalable production, the Company employs a contract manufacturing strategy, enabling rapid capacity expansion with minimal capital investment. Committed to driving innovation in energy storage, Amprius powers next-generation applications in aerospace, defense, and mobility. For additional information, please visit amprius.com and the Company’s LinkedIn page.