Southern Copper — Jul 28, 2025 release

The Los Chancas project envisions an open-pit mine with a combined operation of concentrator and SX-EW processes to produce 130,000 tonnes of copper and 7,500 tonnes of molybdenum annually. The estimated capital investment is $2.6 billion, and operations are expected to begin in 2030-2031. We continue to engage in social and environmental improvements for the local communities and are working on the project ’ s environmental impact assessment. ​ ​ 2Q25 www.southerncoppercorp.com Page 3 of 13 ​ ​ ​ ​ ​ ​ ​ ​ ​ SECOND QUARTER AND SIX MONTHS 2025 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Project update : On June 6, 2025, the "Framework Agreement for the Development of the Tiaparo Peasant Community and the Los Chancas Mining Project" was signed with the community of Tiaparo. This agreement will be in effect throughout the construction and operation phases of the project. This agreement, as well as the important steps taken to control illegal mining activities related to the project represent important milestones in the development of our Los Chancas project. ​ Michiquillay Project - Cajamarca : In June 2018, Southern Copper signed a contract to acquire the Michiquillay project in Cajamarca, Peru. Michiquillay is a world-class greenfield mining project with inferred mineral resources of 2,288 million tonnes and an estimated copper grade of 0.43%. When developed, we expect Michiquillay to produce 225,000 tonnes of copper per year (along with by-products of molybdenum, gold and sil