Antofagasta Investor Conference Presentation Deck

Reliable and responsible copper producer Potential 900,000 tpa of copper 1 Organic growth key strength of our portfolio Solid bases four mines in two world-class districts in Chile Management risks Technical, social, environmental and commercial risks have been assessed End 2022 Indicative directional projection including projects not yet approved and subject to risk uncertainty Actual 2023 - 2025 +12-14% vs Actual 100%¹ complete Esperanza Zaldivar Sur Pit Chloride leach 93% ¹ complete Los Pelambres expansion phase 1 Antofagasta plc | 2023 BMO Global Metals, Mining & Critical Minerals Conference ANTOFAGASTA PLC 2026 2027 +32-35% vs Actual Centinela 2nd concentrator ~900 12

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