Southern Copper — Oct 28, 2025 release

The combination of higher production volumes and better copper and by-product prices enabled us to achieve a cash cost of $0.42 per pound of copper in 3Q25, one of the industry’s lowest. We remain firmly committed to enhancing productivity and cost efficiency, driven by a strategy anchored in discipline and focused on achieving a long-term goal to produce 1.6 million tonnes of copper at the lowest possible, most competitive cost per pound. Recent US tariff policy changes have thus far had a limited impact on our results.  As such, SCC is very confident that the long-term fundamentals of prices for copper and other metals will remain very positive.” ​ ​ ​ 3Q25       www.southerncoppercorp.com Page 2 of 12 ​ ​ ​ ​ ​ ​ ​ ​ ​ THIRD QUARTER AND NINE MONTHS 2025 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Key Financial Data ​ ​ Third Quarter ​ Nine Months ​ ​ 2025 ​ 2024 ​ Variance ​ 2025 2024 ​ Variance ​ ​ ​ ​ $ % ​ ​ $ % ​ ​ (in millions except per share amount and %s) Sales      $ 3,377.3      $ 2,930.9      $ 446.4      15.2%      $ 9,550.2      $ 8,649.0      $ 901.2      10.4% Cost of sales ​   1,356.8 ​   1,223.1 ​   133.7 ​ 10.9% ​   3,887.7 ​   3,629.6 ​   258.1 ​ 7.1% Operating income ​   1,768.8 ​   1,450.3 ​   318.5 ​ 22.0% ​   4,891.3 ​   4,247.3 ​   644.0 ​ 15.2% Net income ​ $ 1,107.6 ​ $ 896.7 ​ $ 210.9 ​ 23.5% ​ $ 3,027.0 ​ $ 2,582.9 ​ $ 444.1 ​ 17.2% Net income margin ​   32.8% ​   30.6% ​   2.2pp ​ 7.2% ​   31.7% ​   29.9% ​   1.8pp ​ 6.0% Adjusted EBITDA ​   1,975.4 ​   1,684.6 ​   290.8 ​ 17.3% ​   5,511.9 ​   4,899.3 ​   612.6 ​ 12.5% Adjusted EBITDA marg