US1 Critical Minerals Limited engages in the acquisition, exploration, evaluation, development, and exploitation of mineral tenements within Tanzania. It primarily explores for uranium deposits. The company holds 100% interest in the Mkuju Project covering an area of approximately 725 square kilometers; the Foxy Project that covers an area of approximately 299 square kilometers; and the Eland Project covering an area of approximately 294 square kilometers. The company was formerly known as Gladiator Resources Limited and changed its name to US1 Critical Minerals Limited in November 2025. US1 Critical Minerals Limited was incorporated in 2002 and is headquartered in Sydney, Australia.