Standard Uranium confirms uranium enrichment in winter 2026 drill holes at Corvo

Vancouver, British Columbia--(Newsfile Corp. - July 14, 2026) - Standard Uranium Ltd. (TSXV: STND) (OTCQB: STTDF) (FSE: 9SU0) (" Standard Uranium " or the " Company ") is pleased to report a summary of geochemical assay results from its winter 2026 drill program at the Corvo Uranium Project (" Corvo ", or the " Project ") located near Wollaston Lake in northeastern Saskatchewan (Figure 1). The results of the winter drill program highlight anomalous * uranium, boron, and other pathfinder elements indicative of a basement-hosted uranium system across multiple target areas on Corvo. In addition, local intervals of elevated Rare Earth Elements (" REE ") were identified in drill hole CRV-26-009, with enriched concentrations of Total Rare Earth Element Oxides plus Yttrium (" TREO* ") greater than 0.1%.

Please see Appendix A for a corresponding table of individual REE results. The Project is currently under a three-year earn-in option agreement (the " Option Agreement ") with Aventis Energy Inc. (" Aventis ") (CSE: AVE). A total of 2,457 metres were completed across ten reconnaissance drill holes at the Manhattan, Brooklyn, and Tribeca target areas (Figure 2).

One drill hole was abandoned due to ground conditions. The winter 2026 drill program was funded by Aventis and operated by Standard Uranium. Highlights Uranium Confirmed: Analytical results from the winter 2026 drill campaign confirm anomalous uranium in all nine completed drill holes, including multiple intervals of significant uranium enrichment (>100-350 ppm U) in six drill holes.

Calculated Uranium:Thorium (" U:Th ") ratios >2:1 from the winter results consistently indicate hydrothermal uranium input. Basement-Hosted System: Uranium mineralization is hosted within deformed and altered paragneiss, pegmatite, and granitoid orthogneiss units. Structural settings include hydrothermally altered fault zone