Antofagasta Results Presentation Deck

Operating performance: H1 2023 10% increase in Group production 1 Los Pelambres Cu production 128.5 kt Net cash costs $1.17/lb Group's 50% share ‒‒‒‒‒ 51 Centinela Cu production 109.2 kt Net cash costs $1.88/lb ‒‒‒‒‒ Zaldívar Cu production¹ 19.8 kt Net cash costs $2.96/lb ‒‒‒‒‒ FCAB Antofagasta plc | 2023 Half Year Results Transport !! Tonnage transported 3,551 kt Antucoya Cu production 38.0 kt Net cash costs $2.72/lb ‒‒‒‒‒‒ I‒‒‒‒‒ m ANTOFAGASTA PLC 11

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