Orosur Mining (OMI) Investor update summary

Strategic progress and project updates

• Achieved transformational year, regaining 51% of Anzá project and advancing Pepas prospect toward a maiden resource by January.

• Increased ownership of El Pantano project in Argentina to nearly 100%, ahead of schedule.

• Strengthened balance sheet with CAD 20 million raised and release of Uruguay provisions.

• Market cap now exceeds $100 million, with cash reserves expected to fund operations into 2027.

• Expanded and diversified shareholder base, including retail and institutional investors from multiple regions.

Project portfolio and exploration highlights

• Anzá and El Pantano projects are in major gold belts of Colombia and Argentina, respectively.

• Pepas prospect at Anzá is high-grade, near-surface, and positioned for low-cost, near-term production.

• APTA prospect is deeper, high-grade, and targeted for resource definition in Q2 next year.

• El Cedro porphyry system mapped and sampled, with drilling planned for Q1, pending geophysical survey logistics.

• El Pantano's first drilling campaign underway, targeting a large, previously untouched mineral system.

Operational and technical developments

• Pepas drilling program nearly complete, with resource estimate and NI 43-101 report expected in January.

• Environmental baseline studies and permitting to follow resource definition, with production targeted in 1.5–2 years.

• Metallurgical testing for Pepas progressing, with results feeding into resource and mine planning.

• Adjustments to assay processes at El Pantano to account for potential silver credits, causing some delays.

• Exploration at El Pantano confirmed presence of a mineral system; next phase will focus on economic viability.