X0609 4 2026-06-08 0 0001970622 USA Rare Earth, Inc. USAR 0001897745 Trabuco Carolyn false 100 W AIRPORT ROAD STILLWATER OK 74075 1 0 0 0 0 Common Stock, par value $0.0001 per share 2026-06-08 4 S 0 13000 22.768 D 18783 D The reporting person's sale of USAR common stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 1,300 shares, with the reporting person's purchase of 1,300 shares of USAR common stock on January 29, 2025 in one lot at $22.5994. The reporting person has agreed to pay to USAR, upon settlement of the sale, $208.34, representing the full amount of the profit realized in connection with the short-swing transaction, less transaction costs. This transaction was executed in multiple trades at prices ranging from $22.760 to $22.785. The price reported reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. /s/ Derek Ching, attorney-in-fact for Carolyn Trabuco 2026-06-08