Southern Copper — Jul 21, 2026 release

The project’s investment requirement is estimated at approximately $2.5 billion, and production is expected to begin in 2032.” ​ ​ ​ ​ ​ 2Q26 www.southerncoppercorp.com Page 2 of 12 ​ ​ ​ ​ ​ ​ ​ ​ SECOND QUARTER AND SIX MONTHS 2026 RESULTS SOUTHERN COPPER ​ ​ ​ ​ Key Financial Data Second Quarter First Six Months 2026 2025 Variance 2026 2025 Variance $ % $ % (in millions except per share amount and %s) Sales $ 4,289.0 $ 3,051.0 $ 1,237.9 40.6% $ 8,540.4 $6,172.9 $ 2,367.5 38.4% Cost of sales 1,389.5 1,211.7 177.9 14.7% 2,888.3 2,530.9 357.5 14.1% Operating income 2,623.2 1,587.0 1,036.2 65.3% 5,103.6 3,122.5 1,981.0 63.4% Net income $ 1,670.0 $ 973.4 $ 696.5 71.6% $ 3,246.8 $ 1,919.4 $ 1,327.5 69.2% Net income margin 38.9% 31.9% 7.0pp 21.6% 38.0% 31.1% 6.9pp 22.2% Adjusted EBITDA 2,856.0 1,790.9 1,065.1 59.5% 5,568.8 3,536.5 2,032.4 57.5% Adjusted EBITDA margin 66.6% 58.7% 7.9pp 13.5% 65.2% 57.3% 7.9pp 13.8% Income per share $ 2.01 $ 1.17 $ 0.84 71.8% $ 3.93 $ 2.33 $ 1.60 68.7% Capital investments 422.8 235.7 187.1 79.4% 864.7 553.5 311.2 56.2% Capital Investments Our current capital investment program for this decade exceeds $20.5 billion and includes investments in projects in Peru and Mexico. Peruvian Projects Our investment in Peruvian projects that are under construction or for which basic or detail engineering or environmental studies are being conducted could surpass $10.3 billion in the next decade. The openness of the Peruvian government and institutions to private investment; strong support from 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 2H27. Project update : As of June 30, 2026, the Company has committed $1,101 million to various project activities, of which $693 million has already been invested. Mass earthworks have moved 13.85 million metric tonnes of material from the La Tapada deposit (a 71% progress). Most purchase orders for the projec