EXHIBIT 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G with respect to the Common Stock, par value $0.0001 per share, of USA Rare Earth, Inc., dated as of September 11, 2026, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.


	Serra Verde Rare Earths Ltd.
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Director
	Date:	09/11/2026

	MVB Investment Holdings LLC
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Vice President & Secretary, Manager on the Board of Managers
	Date:	09/11/2026

	Pembroke Resources II Holdings (Cayman) LLC
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Vice President & Secretary, Managing Director
	Date:	09/11/2026

	Denham Mining Fund LP
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Managing Director of Denham Mining GP LLC, general partner of Denham Mining GP LP, general partner of Denham Mining Fund LP
	Date:	09/11/2026


	Denham Mining GP LP
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Managing Director of Denham Mining GP LLC, general partner of Denham Mining GP LP
	Date:	09/11/2026


	Denham Mining GP LLC
	Signature:	/s/ Anthony Fiore
	Name/Title:	Anthony Fiore, Managing Director
	Date:	09/11/2026