Capstone Copper Corp. has completed the acquisition of the copper assets at the San Pietro copper-gold-iron-cobalt project in Chile’s Atacama Region for total consideration of $25 million, satisfied through the issuance of 2,034,970 Capstone shares to New Golden Exploration Chile SpA.

The transaction adds approximately 16,000 hectares of underexplored ground to the company's land position, consolidating a district-scale footprint in the Mantoverde-Santo Domingo District. The property hosts the Rincones and Colla deposits, which contain an Inferred Mineral Resource of 492 million tonnes grading 0.23% copper and 0.05 g/t gold, comprising 83 million tonnes of oxide material and 410 million tonnes of sulphide material. Further evaluation, including drilling, is required to verify the mineral resource estimate.

The San Pietro project is located in Chile's Atacama Region between Capstone's existing Mantoverde mine, Santo Domingo project, and Sierra Norte properties. The acquisition follows previous regional expansions in the Atacama, including the purchase of Sierra Norte in 2024 and an exploration option agreement signed with Empresa Nacional de Minería in 2025. At the Mantoverde project, the Mantoverde Optimized expansion is scheduled to begin ramping up in late Q3 2026.

“Capstone’s acquisition of San Pietro marks another step in the consolidation of the Mantoverde-Santo Domingo District. Located adjacent to Santo Domingo, and between Mantoverde and Sierra Norte, the Project is a natural fit within a region where we have existing and permitted infrastructure, deep knowledge of the local geology, and an experienced operating and project development team. Following our acquisition of Sierra Norte in 2024 and the exploration option agreement signed with ENAMI in 2025, this Transaction further expands our footprint in the top-tier region of the Atacama. We look forward to integrating San Pietro into our district exploration and development plans as we pursue opportunities to unlock transformational copper production growth.”

— Cashel Meagher, President and Chief Executive Officer

Integration of the newly acquired concessions is expected to support future resource growth and provide incremental oxide and sulphide feed options for existing and planned district infrastructure.

Read the full announcement: Capstone Copper Completes Acquisition of San Pietro Copper Concessions, Consolidating the Mantoverde-Santo Domingo Copper District