Antofagasta Results Presentation Deck

2022 financial highlights Robust results in a complex environment 234 Underlying earnings 59.7 c/share¹ ↓58% Revenue $5.9bn ↓22% Balance sheet Net debt/EBITDA 0.3x 2 Net cash costs $1.61/lb ↑ 34% 1 EPS including exceptional items is 155.5 c/share, a 19% increase on 2022 Moved from net cash of $541 million in December 2021 to net debt of $886 million in December 2022 ROCE On underlying net earnings Calculated as EBITDA/Revenue. If Associates and JVS revenue is included the EBITDA margin was 46.7% in 2022 and 61.1% in 2021 Antofagasta plc | 2022 Full Year Results 14.1% 19 ppt EBITDA $2.9bn ↓39% Dividends per share 59.7cps ↓ 58% 100% pay-out ratio³ EBITDA margin ANTOFAGASTA PLC 50% ↓15 ppt 4 11

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