Quarterly Report September 2026

• FY27 production guidance remains unchanged across all operations.
• Sierra Gorda increased payable copper equivalent production by 11%.
• Approvals for the fourth grinding line project at Sierra Gorda have been received.

South32's September 2026 quarterly report highlights the company's continued focus on production guidance and balance sheet strength while investing in base metals growth. Sierra Gorda's payable copper equivalent production increased by 11% due to higher planned copper grades, and the company commenced execution of the fourth grinding line project, expected to increase processing capacity by 25%. Manganese production also increased by 14% as Australia Manganese benefited from improved operating conditions. The company expects upgrades to the paste delivery system to support higher mining rates at Cannington. South32 shareholders approved the sale of aluminium value chain assets to Alcoa, which remains on track for completion in the June 2027 half year.

South32 expects upgrades to the paste delivery system to support higher mining rates at Cannington over the remainder of FY27.