RareX Limited (ASX: REEEF) is an Australian rare earths development company focused on advancing high-grade rare earth projects to production. The company explores, develops, and aims to produce rare earth elements (REEs), including neodymium-praseodymium (NdPr), dysprosium, and terbium, through its flagship 100%-owned Letheidan rare earth project in Western Australia, which features JORC-compliant resources of over 600,000 tonnes of total rare earth oxides (TREO); it also holds the Fast-Tracked Olympic Domain project in South Australia with ionic adsorption clay-hosted REE mineralization and non-JORC exploration targets exceeding 1 billion tonnes. RareX offers resource delineation services, pilot processing testwork, and strategic offtake development for REE concentrates, serving the global demand for magnets in electric vehicles, wind turbines, and defense applications; its products emphasize low-thorium, high-grade concentrates suitable for separation into individual REE oxides.
Founded in 2019 and headquartered in West Perth, Australia, RareX operates primarily in Australia, with target markets including international REE processors, battery manufacturers, and clean energy technology firms across Asia, Europe, and North America. The company segments its business into exploration, resource development, and early production stages within the critical minerals industry. It maintains no major subsidiaries but collaborates with research institutions for metallurgical optimization.
In the past two years, RareX has achieved significant milestones, including the completion of a successful large-diameter air-core drilling program at Letheidan in 2024, expanding the high-grade resource and confirming metallurgical recoveries exceeding 80% for key magnet REEs; it secured a A$5.6 million placement in late 2024 to fund pilot plant construction and flowsheet refinement. Recent strategic alliances include a memorandum of understanding with a leading Chinese REE separator for potential offtake and processing partnerships announced in mid-2025, alongside engagement with the Australian government's Critical Minerals Strategy for grant funding. These developments position RareX for a feasibility study completion by mid-2026 and first production targeted for 2028, reflecting accelerated project de-risking amid rising global REE supply constraints.