Antofagasta Results Presentation Deck

1 Production and cash costs Impacted by drought and grades Copper production 721.5kt FY 2021 Cash costs $1.20/lb 0.59 Net cash costs By-product credits FY 2021 Cost and Competitiveness Programme (37.2) Throughput $1.79/lb (33.5) 0.03 Grades External: $0.25/lb 0.22 Pre-credit FX & inflation Input prices FY 2021 (12.1) 0.13 Recoveries Controllable: $0.15/lb Throughput 0.13 Grades & recoveries Antofagasta plc | 2022 Full Year Results 6.9 Work-in-progress & inventories (0.07) (0.04) CCP benefits¹ Other 0.6 ROM/Other $2.19/lb Pre-credit FY 2022 0.58 ANTOFAGASTA PLC 646.2kt By-product credits FY 2022 $1.61/lb Net cash costs FY 2022 12

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