Bajo de la Alumbrera

• In December 2025, Glencore announced the restart of operations at Bajo de la Alumbrera, a project that produced copper and gold between 1997 and 2018. • The company reported a phased restart toward the end of 2026, with the goal of resuming production in the first half of 2028. The mine plan includes the extraction and processing of remaining resources—Phase 13 of Bajo de la Alumbrera and Phases 4 and 5 of Bajo El Durazno—using the existing concentrator plant. • Projections indicate production of 72,616 tonnes of copper, 316,809 ounces of gold, and 998 tonnes of molybdenum over a four-year period. • The shutdown of Alumbrera in 2018 marked the beginning of a Care and Maintenance (C&M) phase, during which the concentrator plant and infrastructure were maintained under a structured program focused on the preservation, refurbishment, and replacement of key equipment. At the same time, rehabilitation obligations continued to be met under strict environmental standards.

Minera Alumbrera processed ore through conventional crushing and grinding, sulfide flotation, and a gravity gold circuit. The original design capacity was 80,000 tpd; since then, several expansion projects increased capacity to 110,000 tpd to compensate for lower ore grades and increased rock hardness.