Antofagasta Results Presentation Deck

1 2 EBITDA EBITDA¹ and margin² 2020 HY versus 2021 HY $ million and % 47%² $1,013m 2020 HY EBITDA (85) Sales volumes and TC/RCS 1,520 Realised prices (111) Mining costs + 18.3 ppt +$1,344m (8) Exploration & evaluation (10) Corporate cost & non operating expenses Results of continuing operations only and includes EBITDA from Associates and JVs Calculated as EBITDA/Group revenue. If Associates and JVs' revenue is included the EBITDA margin was 62.1% in 2021 and 44.1% in 2020 30 Associates & JVs 9 Transport division 66%² $2,357m 2021 HY EBITDA ANTOFAGASTA PLC 13

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