Amprius Technologies, Inc. — Director's Dealing 2025

Dec 22, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amprius Technologies, Inc. (AMPX)
CIK: 0001899287
Period of Report: 2025-12-19

Reporting Person: Stepien Thomas M (Director, President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-19	Common stock	A	200000	—	Acquired	610000	Direct

Footnotes

F1: The securities are represented by restricted stock units granted on December 19, 2025, with a vesting commencement date of January 1, 2026. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on February 20, 2027 and the remainder will vest quarterly over three years thereafter, on each May 20, August 20, November 20 and February 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2030.

F2: Includes 600,000 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.