Red Mountain Mining Limited Red Mountain Mining Limited (ASX:RMX) is an Australia-based mineral exploration and development company focused on critical minerals and gold projects across Australia, the United States and Canada. Incorporated in 2006 and headquartered in Subiaco, Western Australia, the company holds 100% interests in key assets including the Mustang Lithium and Lithic Lithium projects in Nevada, USA; the Fry Lake Gold Project in Ontario, Canada; the Kiabye Gold, Koonenberry Gold and Armidale Antimony-Gold projects in Australia; as well as an 80% interest in the Monjebup Rare Earths Project in Western Australia, targeting lithium, gold, antimony, rare earth elements, nickel, copper, cobalt and base metals in mining-friendly jurisdictions. The company's portfolio emphasizes battery minerals and precious metals exploration in regions proximate to established deposits, such as near Silver Peak lithium mine in the US and Victorian Goldfields-analogous terrains in Australia, serving global markets for technology, renewable energy and industrial applications. In recent developments, Red Mountain Mining has pursued an aggressive acquisition strategy since mid-September 2025, securing three US antimony assets in Tier-1 districts including the Utah Antimony Project adjacent to Trigg Minerals' Antimony Canyon and the Yellow Pine Antimony Project near Perpetua Resources' Stibnite in Idaho; listed on the US OTCQB market under RMXFF in November 2025 with a strong trading debut; and advanced its Armidale Antimony-Gold Project in New South Wales alongside ongoing discussions with strategic partners for critical minerals funding and project acceleration.