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US rare earths (ASX:ARR) soar 83.8% after successful impurity removal breakthrough at Halleck Creek

    • American Rare Earths recently announced a major breakthrough in its Halleck Creek project, achieving successful removal of impurities in the processing of allanite-based rare earth ore, a process that has historically faced technical and economic challenges due to problematic byproducts.

    • These advances pave the way for improved efficiencies and reduced risks in rare earth mining, making Halleck Creek a leader in supporting a domestic supply chain of critical minerals in the US.

    • We will explore how overcoming this processing barrier at Halleck Creek reshapes American Rare Earths' investment story and project prospects.

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    The investment story behind American Rare Earths focuses on the significant potential of the Halleck Creek project and the company's ambitions to anchor a domestic U.S. supply chain for critical minerals. Previously, investors weighing ARR were faced with two key short-term catalysts: de-risking complex ore processing at Halleck Creek, and pursuing pre-feasibility, with downside risks sharply focused on technical setbacks and mounting losses. The recent breakthrough, the success in removing troublesome impurities from Halleck Creek ore, directly addresses the company's biggest hurdle, reshaping both its risk profile and path to near-term milestones. While ARR remains unprofitable at zero returns and stock price volatility is high, this process improvement could accelerate completion before feasibility and reduce expected costs. For investors, this milestone materially changes ARR's risk-catalyst balance, setting a new tone for future performance and capital market perception. However, questions remain about the board's independence and the company's high valuation relative to industry peers, factors that any investor should consider.

    The analysis described in our US Rare Earths Valuation Report indicates an inflated share price compared to its estimated value.

    ASX:ARR Earnings and revenue growth as of October 2025
    ASX:ARR Earnings and revenue growth as of October 2025

    Simply Wall St Community's four fair value estimates for ARR all come in at A$0, a sign of extreme caution among community members. Against the backdrop of very high one-year total returns and continued unprofitability of the company, investor sentiments and opinions vary widely. Explore multiple points of view before drawing your own conclusions.

    Do you disagree with this assessment? Create your own story in less than 3 minutes. Extraordinary investment returns rarely come from following the herd.

    • A good starting point for your research into US rare earths is our analysis, which highlights four key warning signs that could impact your investment decision.

    • Our free US Rare Earths research report provides comprehensive fundamental analysis summarized in a single image: the Snowflake, making it easy to assess the overall financial health of US Rare Earths at a glance.

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    This article from Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts using only an unbiased methodology and our articles are not intended as financial advice. It is not a recommendation to buy or sell any stock and does not take into account your objectives or financial situation. We aim to provide you with targeted, long-term analysis based on fundamental data. Please note that our analysis may not take into account the latest price-sensitive company announcements or quality material. Simply Wall St has no positions in the stocks mentioned.

    Companies discussed in this article include ARR.AX.

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