Southern Copper — Jul 21, 2026 release

It will operate as an open-pit mine with an annual production capacity of 36,000 tons of copper cathode, utilizing cost-efficient and environmentally friendly SXEW (Solvent Extraction and Electrowinning) technology. With an investment of $551 million, this project will employ a direct workforce of 450 people during the construction phase and 300 during the operational phase. El Arco - Baja California: This is a world-class copper deposit located in the central part of the Baja California peninsula with more than 1,230 million tons in sulphide ore reserves with an average ore grade of 0.40%, and 141 million tons of leach material with an average ore grade of 0.27%. The project includes an open-pit mine with a combined 120 ktpd concentrator and 28 ktpy SX-EW operations. ​ ​ ​ ​ ​ 2Q26 www.southerncoppercorp.com Page 4 of 12 ​ ​ ​ ​ ​ ​ ​ ​ SECOND QUARTER AND SIX MONTHS 2026 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Under the Mexican constitution, the government is solely responsible for electric energy transmission. The Comisión Federal de Electricidad (CFE), as the competent government entity, must interconnect the Baja California peninsula with the rest of the country. In this context, our project’s initiation is dependent on action at the Mexican government level. Environmental, Social & Corporate Governance (ESG) Practices Cularjahuira dam improves agricultural results in Candarave. Over the last five years, the Cularjahuira dam, loca