X0609 4 2026-06-12 0 0001899287 Amprius Technologies, Inc. AMPX 0001045434 DIXON DONALD R false C/O AMPRIUS TECHNOLOGIES, INC., 1180 PAGE AVENUE FREMONT CA 94538 1 0 0 0 0 Common stock 2026-06-12 4 A 0 10423 0 A 280079 D Common stock 163142 I See Footnote Common stock 2026-06-15 4 S 0 85000 17.1672 D 359380 I See Footnote The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date. Includes 10,423 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. These shares of common stock held by Donald & Elizabeth Dixon 2004 Family Partners, of which Mr. Dixon is a co-general partner. These securities are held directly by The Dixon Revocable Trust, for which the reporting person and his spouse are co-trustees. /s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Donald R. Dixon 2026-06-16