Southern Copper — Jul 21, 2026 release

These outstanding achievements are driven by operating excellence and reflect our commitment to creating long-term value for our stakeholders in a context marked by sustained demand for copper and the other minerals we produce. As part of the development of the Tía María project, the Company secured $1.25 billion through a bond, carrying a 5.35% annual coupon and maturing in 2036. The project is expected to produce 120,000 metric tonnes of refined copper during its initial years of operation using SX-EW technology. Cash cost is estimated at $1.16 per pound of copper. We expect all equipment to be fully assembled next year, and initial production to begin in the second half of 2027. SCC is also advancing its Michiquillay project, a world-class copper deposit with a strong potential to spur Peru’s development. Located in Cajamarca, Michiquillay is expected to produce approximately 225,000 metric tonnes of copper per year, along with molybdenum, gold, and silver by-products, over an initial mine life of more than 25 years. 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