Antofagasta Investor Day

GROWTH PIPELINE Organic Growth Other Growth 2021 LOS PELAMBRES EXPANSION - PHASE 1 (in construction) Cu +60 ktpa | Capex $1.7 bn¹ (including desalination plant) 1 Revised January 2021 2 2014 Prefeasibility study 3 2018 Feasibility study ESPERANZA SUR PIT (in construction) 4 5 6 2022 Cu +10-15 ktpa | Capex $0.17bn³ ZALDÍVAR CHLORIDE LEACH (in construction) Cu +10-15 ktpa | Capex $0.19 bn5 2015 Prefeasibility study 100% basis 2018 Prefeasibility study 2023 PHASE 2 (in FS stage) TWIN METALS (in FS stage) Cu Eq +65 ktpa 2024 Cu +35 ktpa | Capex $0.5 bn² 15-year LOM extension CENTINELA 2ND CONCENTRATOR (in FS stage) Cu eq +180 ktpa | Capex $2.7 bnª EXPLORATION FOCUSING ON THE AMERICAS 2025+ 23

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