Antofagasta Results Presentation Deck

1 Production and cash costs Copper Production kt Cash costs by cost type $/lb Cost and Competitiveness Programme 371.7 kt HY 2020 $1.51/lb 0.17 (14.4) Grades Pre-credit FX & Inflation HY 2020 0.11 10.9 Throughput -10.3 kt (-3%) $0.22/lb (15%) 0.03 (11.0) Recovery (0.03) Lower Materials Increased grades and movement throughput recoveries (0.04) 3.5 Work-in-progress & inventories CCP savings¹ (0.01) Others 0.7 ROM/Others $1.73/lb (0.59) Pre-credit By-products HY 2021 credits ANTOFAGASTA PLC 361.5 kt HY 2021 $1.14/lb Net cash cost HY 2021 12

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