Welcome to our dedicated page for American Rare Earths news (Ticker: ARRNF), a resource for investors and traders seeking the latest updates and insights on American Rare Earths stock.
American Rare Earths Limited (ARRNF) generates frequent news as it advances the Halleck Creek Rare Earths Project in Wyoming and positions itself within the U.S. critical minerals landscape. Company announcements highlight technical milestones, resource updates, permitting progress and corporate developments that are central to understanding its trajectory as a rare earths developer.
News coverage often focuses on mineral processing breakthroughs, such as impurity removal neutralization tests on allanite-based ore, the selection of magnesium oxide as the preferred neutralizing reagent, and the successful production of mixed rare earth oxalate and mixed rare earth oxide (MREO) from Halleck Creek ore. These updates provide insight into how the company is de-risking its hydrometallurgical flowsheet and moving toward a robust Pre-Feasibility Study.
Investors can also follow resource and exploration news, including updated Mineral Resource Estimates for the Cowboy State Mine area, channel sampling results, and new drilling permits at both the Cowboy State Mine and Bluegrass exploration areas. These releases outline how geological data and modeling are refining the scale and classification of resources within Halleck Creek.
Corporate and strategic news includes board and management changes, expanded relationships with engineering partners such as Tetra Tech, and initiatives to explore U.S. government funding opportunities for critical minerals projects. Quarterly activity reports and AGM addresses summarize progress in test mining, optimization work, permitting and funding, and frame Halleck Creek’s role in the broader U.S. mine-to-magnet strategy.
By tracking ARRNF news, readers can monitor how American Rare Earths is progressing from exploration and test work toward potential development, and how its technical and regulatory milestones may influence the long-term outlook for the Halleck Creek Project.
American Rare Earths (ADR: AMRRY) reported quarterly activity for the period ending September 30, 2025 outlining technical, permitting and funding progress at the Halleck Creek Rare Earths Project in Wyoming.
Key technical milestones include an impurity-removal breakthrough with minimal gypsum and silica gel formation, high light-rare-earth leach recoveries (Nd 84%, Pr 85%), completed test mining of 3,080 tonnes, and ongoing optimization for a beneficiation demonstration plant. Corporate highlights: A$15.0m placement at A$0.32, A$1.465m from option exercises, A$21.2m cash at quarter end, and ~A$8.8m available under a Wyoming matching grant. Permitting and PFS work will continue into 2026.
American Rare Earths (ADR: AMRRY) announced completion of the first phase of impurity removal neutralization tests for Halleck Creek allanite ore on October 13, 2025. SGS Lakefield testing found MgO optimal for primary neutralization, producing minimal gypsum and silica gel. Key results: 99.8% iron, 99.4% titanium, 92.9% thorium removal in primary neutralization (PN12) with average REE loss of 0.6% LREE and 0.8% HREE. Secondary neutralization (SN2) removed further impurities but precipitated 7.6% LREE and 16.7% HREE, with solids recommended to be recycled to leaching. Data will feed the PFS flowsheet and remaining hydrometallurgical work is expected to finish before year-end.
American Rare Earths (OTCQX: AMRRY) has completed a significant test mining operation at its Cowboy State Mine within the Halleck Creek deposit. The company successfully excavated and crushed approximately 3,080 tonnes of rare earth ore, with 13.7 tonnes dispatched to various vendors for comminution testing and process optimization.
The testing program, involving partners like Fl Smidth, Loesche GmbH, Corem, and DISA Technologies, aims to optimize milling methods to minimize fines generation and enhance rare earth recoveries. The remaining ore will be stockpiled for use in a future demonstration plant, which will validate processing methods and support technical studies.
This initiative is crucial for improving the Pre-Feasibility Study economics and advancing ARR's goal of establishing a 100% domestic supply chain for critical minerals in the permanent magnet industry.
American Rare Earths (OTCQX: AMRRY) has initiated test mining operations at its Cowboy State Mine, part of the Halleck Creek deposit in Wyoming. The company successfully completed its first blast, targeting the extraction of 3,200 tonnes of ore to serve as feedstock for a demonstration plant.
The mining process involves two phases: first, extracting weathered material from 3.6 meters below surface, followed by accessing and crushing underlying non-weathered ore to approximately 5-centimeter pieces. The extracted material will support metallurgical testing, process optimization, demonstration plant operations, and sample production for potential offtake partners.
This milestone represents a crucial step in de-risking full-scale development, validating processing flowsheets, and refining engineering and cost models for future plant construction.
American Rare Earths (OTCQX: AMRRY) announced a significant breakthrough in rare earth element (REE) processing at its Halleck Creek project. The SynBREE consortium, led by Lawrence Livermore National Lab, successfully produced 97.1% pure Heavy Rare Earth Oxide (HREO) and 96.4% pure Light Rare Earth Oxide (LREO) concentrates from the project's allanite-based ore.
The achievement is part of the US Department of Defense's DARPA EMBER project, which aims to develop biotechnology-based REE separation and purification strategies. The University of Kentucky processed approximately 840kg of ore from 36 drill holes, achieving an 82% recovery rate of total rare earths from the leachate solution.
American Rare Earths (AMRRY) has secured A$15.0 million through a private placement at A$0.32 per share, representing an 18.8% discount to the 10-day VWAP. The placement received strong support from existing shareholders and institutional investors globally.
The funds will be strategically allocated to accelerate the development of the Halleck Creek Rare Earths Project in Wyoming, one of the largest rare earth deposits in the U.S. Specifically, the proceeds will fund a demonstration plant for the beneficiation process, in-fill drilling at the Cowboy State Mine, and engineering work.
American Rare Earths (OTCQX: AMRRY) has announced significant progress in optimizing mineral processing at its Halleck Creek Rare Earths Project's Cowboy State Mine in Wyoming. The company is conducting parallel mineral processing optimization tests focused on improving magnet rare earths recoveries through multiple comminution and beneficiation methods.
Key developments include ordering long-lead time equipment for a demonstration plant, including conventional magnetic separation equipment, and plans to commence test mining to extract ~3,200 tonnes of bulk samples. The optimization work involves testing three different comminution methods: Vertical Roller Mill, High Pressure Grinding Rolls Air Classifier, and HPGR Tower Mill.
While this additional optimization work will extend the Pre-Feasibility Study (PFS) timeline, it aims to create a more robust mineral processing flow-sheet and advance the project toward becoming a producing asset.
American Rare Earths (AMRRY) has announced significant progress in its Halleck Creek Rare Earths Project's metallurgical testing program. The company achieved notable leach recoveries for critical rare earth elements, including 85% for Praseodymium and 84% for Neodymium at optimal conditions.
The testing, conducted at SGS's laboratory in Lakefield, included 25 leach tests exploring various parameters. A key breakthrough was achieved with significantly lower impurity elements, with iron and aluminum concentrations 5.0x and 2.9x lower respectively compared to previous Scoping Study tests. The company has selected Atmospheric Tank Leach as the preferred method, noting its superior energy efficiency and cost-effectiveness.
These results represent a crucial milestone in the technical de-risking of the Cowboy State Mine Pre-Feasibility Study, establishing optimal leach conditions for producing rare earth magnet oxides.
American Rare Earths (AMRRY) has achieved a significant milestone in its permitting process for the Cowboy State Mine project by successfully installing 10 groundwater monitoring wells. The wells, part of the Halleck Creek Rare Earths Project in Wyoming, will collect baseline environmental and hydrological data over a 12-month period to support the state mining permit application with the Wyoming Department of Environmental Quality (WDEQ).
The project, located on State-managed land, benefits from a streamlined permitting process compared to Federal lands. The company plans to conduct 24-hour pump testing to measure water flow and assess mine dewatering requirements. The Pre-Feasibility Study (PFS) remains on track for completion in late 2025, with first production targeted for 2029. The project is supported by a substantial 2.63 billion tonne JORC Resource, positioning it as one of the largest rare earth projects in the United States.
American Rare Earths (AMRRY) has reported promising results from its channel sampling program at the Cowboy State Mine, part of the Halleck Creek Rare Earths Project in Wyoming. The program revealed Total Rare Earth Oxide (TREO) grades up to 13,651 ppm (1.37%), with 15 of 106 samples exceeding 4,500 ppm TREO.
Key findings include magnet rare earth oxides (MREO) averaging 1,023 ppm (28% of total TREO) and heavy rare earth oxides (HREO) averaging 464 ppm (13% of TREO). The southern portion of Red Mountain showed the highest-grade material. The company's Pre-Feasibility Study remains on track for completion in late 2025, with potential first production by 2029.
Located on state lands in Wyoming, the project benefits from streamlined development pathways and could become a significant domestic source of critical rare earth materials, particularly terbium and dysprosium, which are crucial for high-temperature magnet performance and currently face export restrictions from China.
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