X0609 4 2026-05-05 0 0001899287 Amprius Technologies, Inc. AMPX 0001476220 Sun Kang false C/O AMPRIUS TECHNOLOGIES, INC., 1180 PAGE AVENUE FREMONT CA 94538 1 0 0 0 0 Common stock 2026-05-05 4 A 0 6250 0 A 1348650 D The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/8th of shares subject to award will vest on May 20, 2026 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2028. Includes 1,165,635 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. /s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kang Sun 2026-05-07