Southern Copper — Oct 28, 2025 release

These projects are Angangueo, Chalchihuites and the Empalme Smelter, which could bolster our position as a fully integrated copper producer. We are conducting 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 tonnes in sulphide ore reserves with an average ore grade of 0.40% and 141 million tonnes 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. Detailed engineering is still underway for the concentrator, SX-EW plant, water desalination, logistics infrastructure and power delivery. ​ ​ 3Q25       www.southerncoppercorp.com Page 4 of 12 ​ ​ ​ ​ ​ ​ ​ ​ ​ THIRD QUARTER AND NINE MONTHS 2025 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Environmental, Social & Corporate Governance (ESG) Practices Our sustainability ratings are on the rise. In its Corporate Sustainability Assessment 2025, S&P Global increased SCC’s rating by 4 points over last year’s print. This result positions the company among the leaders in the mining sector’s performance ranking, with a rating that is more than twice the industry’s average. Some of SCC’s disaggregated ratings were the highest reported for the sector: i) transparency and reporting, ii) environmental manage