Antofagasta Investor Conference Presentation Deck

2022 Guidance Drought impact continues at Los Pelambres Copper production (kt) 1 2 722 44 79 274 325 2021 Los Pelambres Centinela Guidance 660-690 53 78 250 295 2022 Antucoya 1 Zaldívar¹ $1.20/lb Net cash costs FY 2021 883 $1,777m 56 336 0.11 Lower copper Lower by- production product production and price 503 2021 Cash costs +$0.35/lb Group's 50% share Figures are based on cash flow and exclude Zaldívar. Attributable Zaldívar capital expenditure was $87m in 2021. Antofagasta plc | 2022 BMO Global Metals & Mining Conference 0.14 Capital expenditure² Guidance $1.7-1.9bn 0.10 2022E Higher input prices $1.55/lb Net cash costs 2022E Growth Transport & corporate Sustaining (Mining) Mine development 8

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