ATEX Resources (ATX) Valeriano Mineral Resource Update 2025 presentation summary

Project overview and strategic context

• 100% ownership of a major copper-gold project in Chile’s Atacama Region, positioned among world-class porphyry deposits and benefiting from established infrastructure and regional mining alliances.

• Recognized as Chile’s largest copper discovery in the past decade, rapidly advancing to a globally significant deposit with ongoing exploration upside.

• Strategic surface rights acquisition of 14,550 hectares secures land for infrastructure, provides water rights, and enhances long-term project certainty.

2025 mineral resource update highlights

• 130% increase in drilling metres (51,000m in 2025 vs. 22,000m in 2023) led to a 23% larger mineral envelope and improved geological models.

• Indicated resource: 475 Mt at 0.88% CuEq (0.58% Cu, 0.25 g/t Au, 1.39 g/t Ag, 70.4 g/t Mo); Inferred: 1.5 Bt at 0.75% CuEq.

• 24% of the resource now classified as Indicated, with improved metallurgical recoveries (95% Cu, 94% Au, 80% Ag, 64% Mo).

• High-grade B2B zone and porphyry core remain open for expansion, with multiple new targets identified for future drilling.

Comparative performance and value creation

• Discovery cost remains below 1 cent/lb, outperforming industry averages and maintaining efficiency comparable to the 1990s.

• Valeriano ranks among the largest global copper discoveries since 2014 and leads Chilean discoveries over the past decade.

• Resource grade and recoveries are industry-leading, with a reported CuEq grade of 0.78% and illustrative recoveries of 95%.

• Value creation per metre drilled (303 t/m) surpasses comparable projects in the region.