Antofagasta Results Presentation Deck

1 2 2021 HY highlights Strong financials, reflecting improved copper price Safety LTIFR¹: 1.28 ↑ Copper production 361,500 tonnes in line with guidance Financial results EBITDA: $2,357m ↑ EBITDA margin²: 66% EPS: 67.5 c/share ↑ Net cash costs $1.14/lb below guidance Lost Time Injury Frequency Rate. The number of accidents with lost time during the year per million hours worked EBITDA Margin calculated as EBITDA/Revenue. If Associates and JVs revenue is included EBITDA margin was 62.1% ANTOFAGASTA PLC Balance sheet and dividend Net cash of $701m ↑ Cash flow from operations of $2.5bn Interim dividend 23.6 c/share ↑ Growth projects Los Pelambres Expansion Zaldívar Chloride Leach Esperanza Sur pit LO 5

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