Antofagasta Results Presentation Deck

Recent exploration success Group mineral resources increased by 920Mt Puerto Mejillones Antofagasta Puerto Huasco Antucoya Huasco Freirina Cachorro Vallenar Alte Del Carmen Centinela calama Encierro Cachorro ● ● ● ● Encierro ● ● ● Inferred resources 242Mt @1.21% Cu. 70% increase since 2021 Important manto-type deposit in the coastal metallogenic belt of northern Chile Drilling continues in 2023 Located between Antucoya and Centinela Inaugural inferred resource 522Mt @0.65% Cu Eq Only 15% of the property has been drilled Jointly held with Barrick Gold. Antofagasta the majority shareholder and operator ANTOFAGASTA PLC Antofagasta plc | 2022 Full Year Results 26

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