Antofagasta Investor Update

2022 Performance and guidance Drought impact continues at Los Pelambres Los Pelambres 164 0.66 H1 21 161 0.60 Copper production 0.59 Centinela H1 21 147 0.65 H2 21 Q1 22 Throughput (ktpd) 165 0.63 0.61 99 H2 21 0.68 159 0.65 0.44 Q1 22 Throughput (ktpd) Grade Concentrate (%) I Forecast 115 I 0.66 I 163 H1 22 Grade (%) 178 0.64 I 0.48 0.63 Forecast H2 22 164 0.74 0.51 H1 22 H2 22 Grade Cathodes (%) ● ● $1.20/lb Net cash costs FY 2021 ● T 0.11 Cash costs +$0.35/lb 0.14 Lower copper Lower by- production product production and price Net cash costs Guidance unchanged at $1.55/lb Antofagasta plc | 2022 BofA Global Metals, Mining & Steel Conference 0.10 Higher input prices $1.55/lb Production Guidance for the year is unchanged: 660-690,000 tonnes Copper production is expected to increase quarter-on-quarter throughout the year I Net cash I costs I 2022E 1.75 Net cash costs Q1 2022 Capital expenditure Expected to be $1.9 billion, at the top end of the original guided range LO 5

View entire presentation