Mineral Useful resource Estimate Up to date for the Cowboy State Mine Space at Halleck Creek

American Uncommon Earths (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) (“ARR” or the “Firm”), is happy to announce an up to date Mineral Useful resource Estimate for the Cowboy State Mine space inside its flagship Hallack Creek Uncommon Earths Mission. The replace incorporates the outcomes from 18 further channel samples and coincides with the acquisition of two new exploration drilling permits.

Highlights

• Up to date Mineral Useful resource Estimate within the Cowboy State Mine (“CSM”) Space RECLASSIFIES INDICATED RESOURCE BY 68.4 MILLION TONNES.
  • 102 Channel Samples collected in 2025 supplied information factors for an up to date geological useful resource mannequin, useful resource conversion and mineral useful resource ESTIMATE
  • Summer time exploration and mapping collected 18 further channel samples throughout the CSM space
    • 18 Channel samples returned common values of 5,471 ppm Whole Uncommon Earth Oxides (TREO)
    • Standout pattern (CS25-RM111) contained a brand new report excessive assay grade for all the Halleck Creek Useful resource with a Whole Uncommon Earth Oxide (“TREO”) grade of 13,816 PPM, which is 4X greater than the useful resource common
• New exploration drilling permits obtained at Halleck Creek:
  • 27 gap areas have been permitted on the CSM space for the Growth drilling wanted for future technical research past the Pre-Feasibility Examine (“PFS”)
  • 29 gap areas have been permitted on the Bluegrass space, a possible exploration goal which might add to whole Halleck Creek Mineral Useful resource Estimates

Odessa Useful resource Ltd. (“Odessa”), of Perth Australia, have been commissioned to replace the geological useful resource mannequin for the CSM Space utilizing 102 channel samples collected throughout 2025. The areas and assays for the 102 channel samples added to the geological useful resource mannequin reside in Appendix B. The up to date mineral useful resource estimate for the Cowboy State Mine space is roughly 547.5 million tonnes utilizing a TREO cut-off grade of 1,00ppm, see Desk 1 and Determine 4. The channel pattern outcomes enabled Odessa to reclassify roughly 63.9 million tonnes to the indicated class from the inferred class from the Mineral Useful resource Estimate introduced within the February 2025 up to date CSM Scoping Examine¹, see Desk 2. Further mapping related to the channel sampling expanded the useful resource space to extend the CSM mineral useful resource estimate by roughly 4.5 million tonnes. It ought to be famous that the general tonnage enhance and alter in grade don’t mirror a cloth change to the overall useful resource estimates for the Cowboy State Mine space.

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