Great Southern Copper (GSCU) Corporate presentation summary

High-grade discovery and resource expansion

• Drilling at Mostaza mine intersected 20m at 3.3% Cu and 270g/t Ag, including 7m at 5.72% Cu and 490g/t Ag, significantly exceeding historical grades by up to 600%.

• Phase II drilling confirmed strike potential up to 500m south, with intersections such as 33m at 1.96% Cu and 60.6g/t Ag.

• Ongoing resource and exploration drilling programs aim to expand the deposit along trend and at depth.

• Metallurgy studies and further drilling are planned to support resource growth.

District-scale exploration and project pipeline

• Especularita is positioned as an emerging copper district with multiple drill-ready prospects and significant under-explored lithocap areas.

• The project area features abundant historical workings, all-year access, and proximity to port infrastructure.

• Exploration targets include porphyry Cu-Au, IOCG, and IRGS systems, with a pipeline of early to advanced-stage prospects.

• Landsat spectral surveys highlight large-scale alteration systems, indicating potential for concealed porphyry systems.

Strategic exploration and growth plans

• Aggressive, low-cost exploration strategy with a drilling pipeline extending beyond 2025.

• 2025-26 work plan includes 5,000m diamond drilling and 5,000m scout RC drilling at Mostaza, plus regional geophysics and sampling.

• Value creation is driven by sustained drilling, with the Mostaza discovery providing a platform for rapid growth.

• Five drill-ready prospects are set to enhance project scale and attract alternative funding.