Antofagasta Investor Update

Growth options 123 Other Growth Organic ESPERANZA SUR PIT (in construction) Growth Cu +10-15 ktpa | Capex $0.17bn³ ZALDÍVAR CHLORIDE LEACH (in commissioning) Cu +10-15 ktpa | Capex $0.19 bn5 2021 LOS PELAMBRES EXPANSION - PHASE 1 (in construction) Cu +60 ktpa | Capex $2.2 bn¹ (including desalination plant) Revised April 2022 2014 Prefeasibility study 2018 Feasibility study 4 5 2022 2015 Prefeasibility study 100% basis Desalination Concentrator plant plant 2023 PHASE 2 (in FS stage) Antofagasta plc | 2022 BofA Global Metals, Mining & Steel Conference CENTINELA 2ND CONCENTRATOR (in FS stage) Cu eq +180 ktpa | Capex $2.7 bnª Cu +35 ktpa | Capex $0.5 bn² 15 year LOM extension EXPLORATION FOCUSING ON THE AMERICAS 2024+ 12

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