Southern Copper — Jan 27, 2026 release

The projects’ construction and subsequent operating phases will generate new poles of development; create significant job opportunities; and drive growth in tax revenues at both, national and regional levels. ​ Tia Maria - Arequipa: This greenfield project in Arequipa, Peru will use state-of-the- art SX-EW technology that meets the highest international environmental standards and has the capacity to produce 120,000 tonnes of SX- EW copper cathodes per year. ​ Project update: As of December 31, 2025, the company had committed $790 million to different project activities. Large-scale earthmoving works have mobilized 1.7 million tons of material from the La Tapada deposit. Purchase orders to acquire metallic structures for secondary and tertiary crushing have been issued for the dry area. At the SX-EW process level, state-of-the-art technology has been selected for our main equipment. Access roads and platforms, as well as the temporary contractor camp have been completed. ​ Regarding energy supply, all earthworks for the electrical main substation have been completed; foundation works are currently underway and the transmission line is being built. Next efforts will focus on developing the main and secondary components of the project’s dry and wet areas and setting up a temporary camp. ​ ​ ​ ​ ​ 4Q25       www.southerncoppercorp.com Page 3 of 11 ​ ​ ​ ​ ​ FOURTH QUARTER AND YEAR 2025 RESULTS SOUTHERN COPPER ​ ​ ​ ​ At the end of 2025, progress at Tia Maria stood at 24% and 3,589 new jobs had been generated; 978 of these positions were filled with local applicants. To the fullest extent possible, we intend to fill the 5,000 jobs estima