Southern Copper — Apr 28, 2026 release

This year, we will remain focused on achieving our operational targets and advancing the development of our projects.” ​ Key Financial Data ​ ​ ​ 1Q26 ​ 1Q25 ​ Variance ​ 4Q25 ​ Variance ​ ​ ​ ​ ​ ​ $ ​ % ​ ​   ​ ​ ​ $ ​ % ​ ​ (in million except per share amount and %s) Sales   ​ ​ ​ $ 4,251.4   ​ ​ ​ $ 3,121.9   ​ ​ ​ $ 1,129.5   ​ ​ ​ ​   ​ 36.2%   ​ ​ ​ $ 3,869.8 ​ $ 381.7   ​ ​ ​   ​ 9.9% Cost of sales ​ ​ 1,498.8 ​ ​ 1,319.2 ​ ​ 179.6 ​ ​ 13.6% ​ ​ 1,471.5 ​ ​ 27.2 ​ ​ 1.9% Operating income ​ ​ 2,480.4 ​ ​ 1,535.5 ​ ​ 944.9 ​ ​ 61.5% ​ ​ 2,110.4 ​ ​ 370.0 ​ ​ 17.5% Net income ​ $ 1,576.9 ​ $ 945.9 ​ $ 631.0 ​ ​ 66.7% ​ $ 1,307.9 ​ $ 269.0 ​ ​ 20.6% Net income margin ​ ​ 37.1% ​ ​ 30.3% ​ ​ 6.8pps ​ ​ 22.4% ​ ​ 33.8% ​ ​ 3.3pps ​ ​ 9.8% Adjusted EBITDA ​ ​ 2,712.8 ​ ​ 1,745.5 ​ ​ 967.3 ​ ​ 55.4% ​ ​ 2,310.5 ​ ​ 402.3 ​ ​ 17.4% Adjusted EBITDA margin ​ ​ 63.8% ​ ​ 55.9% ​ ​ 7.9pps ​ ​ 14.1% ​ ​ 59.7% ​ ​ 4.1pps ​ ​ 6.9% Income per share ​ $ 1.92 ​ $ 1.15 ​ $ 0.77 ​ ​ 67.0% ​ $ 1.56 ​ $ 0.36 ​ ​ 23.1% Capital investments ​ ​ 441.9 ​ ​ 317.8 ​ ​ 124.1 ​ ​ 39.0% ​ ​ 422.6 ​ ​ 19.2 ​ ​ 4.6% ​ ​ ​ ​ ​ 1Q26       www.southerncoppercorp.com Page 2 of 11 ​ ​ ​ ​ ​ FIRST QUARTER 2026 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Capital Investments ​ Our current capital investment program for this decade exceeds $20.5 billion and includes investments in projects in ​ Peruvian Projects ​ Our investments in Peruvian projects that are being built or for which basic or detail engineering is being conducted could surpass $10.3 billion in the next decade. ​ The openness of the Peruvian government and institutions to private investment; the strong support of local communities; and respect for the rule of law underpin our aggressive investment program. With the backing and assistance of Peruvian authorities, the Company is moving forward to secure the administrative permits and licenses required before initiating investment. 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.  Operations are expected to begin in 3Q27. ​ Project update: As of March 31, 2026, the Company has committed $948 million across vario