Antofagasta Results Presentation Deck

EBITDA Resilient EBITDA margin $ million and %¹ 49% $1,238m HY 2022 EBITDA² 348 Sales volumes 7 Realised prices (165) Mining costs (3) ppt $93m (11) Exploration & evaluation (27) Non operating expenses & corporate cost Antofagasta plc | 2023 Half Year Results (61) Associates & JVs 1 Margin calculated as EBITDA/Group revenue. If Associates and JVs' revenue is included the EBITDA margin was 43.2% in H1 2023 and 44.9% in H1 2022 2 Results of continuing operations only and includes EBITDA from Associates and JVs 1 Transport division ANTOFAGASTA PLC 46% $1,331m HY 2023 EBITDA² 13

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