Amprius Director Steven Chu Receives 10,423 Restricted Stock Units

This Form 4 filing reports that Steven Chu, a director of Amprius Technologies, Inc., received 10,423 restricted stock units (RSUs) on June 12, 2026. The RSUs were granted at $0 per share and represent a contingent right to receive shares of the company's common stock. According to the footnotes, these restricted stock units vest on the earlier of (i) the one-year anniversary of the grant date or (ii) the day before the next annual meeting of stockholders, subject to Chu's continued service as a director. Following this transaction, Chu's total holdings in Amprius increased to 137,762 shares, which includes the 10,423 RSUs. The filing was signed by attorney-in-fact Ricardo C. Rodriguez on behalf of Steven Chu on June 16, 2026.