Power of Attorney for Paul J. Kern

The filing is a Power of Attorney document executed by Paul J. Kern, a director of USA Rare Earth, Inc. The document appoints David Kronenfeld and Ana Fernandez Cortez as attorneys-in-fact to execute and file Forms 3, 4, 5, and 144 on behalf of Kern in relation to his beneficial ownership of securities in USA Rare Earth, Inc. The attorneys-in-fact are granted full authority to perform all necessary actions related to these filings, including amendments and timely submissions to the Securities and Exchange Commission and other relevant authorities. The Power of Attorney remains in effect until Kern is no longer required to file these forms, unless revoked earlier by Kern in writing. The document also includes indemnification clauses protecting the attorneys-in-fact and the company from liabilities arising from any inaccuracies or delays in the information provided by Kern.