Antofagasta Results Presentation Deck

Reliable and responsible copper producer Pipeline for growth to 900,000tp.a. of copper production Encierro Portfolio projects Greenfields Exploration 2030+ Cuprochlor-T Cachorro Zaldívar primary sulphides Centinela 2nd Concentrator Phase 2 Los Pelambres Expansion Phase 2 Other Innovation Centinela 2nd Concentrator Phase 1 Development 2025+ Antofagasta plc | 2023 Half Year Results Los Pelambres Expansion Phase 1 120 ktpa Cu 50 ktpa Cu 35 ktpa Cu 15 ktpa Cu PRAKTHA Production Construction 2023 ANTOFAGASTA PLC Sized to 50 ktpa for illustrative purpose only 900ktpa target once Centinela Second Concentrator is operating 23

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