Amprius Technologies Director Kathleen Bayless Receives 10,423 Restricted Stock Units

This Form 4 filing reports that Kathleen A. Bayless, 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 one share of common stock each. The units vest on the earlier of the one-year anniversary of the grant date or the day before the next annual stockholders meeting, subject to continued service. Following this transaction, Bayless holds 216,120 shares including the RSUs. The filing also includes a Power of Attorney document dated November 5, 2025, authorizing company representatives to file SEC documents on Bayless's behalf. This is a routine equity award to a director as part of compensation for board service.