Southern Copper — Apr 28, 2026 release

These projects are Angangueo, Chalchihuites and the Empalme Smelter, which are expected to bolster our position as a fully integrated copper producer. We are engaged in talks with the current administration to continue rolling out SCC’s Mexican investments for $10.2 billion. ​ 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. ​ 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. ​ Detailed engineering is still underway for the concentrator, SX-EW plant, water desalination facilities, logistics infrastructure and power delivery. ​ ​ ​ ​ ​ 1Q26       www.southerncoppercorp.com Page 4 of 11 ​ ​ ​ ​ ​ FIRST QUARTER 2026 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Environmental, Social & Corporate Governance (ESG) Practices ​ For the fifth consecutive year, S&P Global included SCC in its Sustainability Yearbook , which rec