Antofagasta Results Presentation Deck

1 Production and cash costs Copper Production kt Cash costs by cost type $/lb Cost and Competitiveness Programme 770 Copper 2019 FY 1.65 Pre-credit 2019 FY (0.05) FX & Inflation (45) Grade (0.05) Input prices 19 Throughput 0.08 (36) Lower Grades (0.09) (6) Recovery 0.01 Higher throughput (3) Work-in-progress inventories (0.09) CCP savings¹ 1.56 (1) ROM and others Pre-credit 2020 FY (0.42) By-products credits ANTOFAGASTA PLC 734 Copper 2020 FY 1.14 Net cash costs 2020 FY 13

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