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Director Declaration - External Appointment

RNS Number : 1172D

Antofagasta PLC

05 May 2026

Director declaration - external appointment

In accordance with Listing Rule 6.4.9(2), Antofagasta plc (the "Company") announces that Ignacio Bustamante, a Non-Executive Director of the Company, has been appointed as a director of Pan American Silver Corp., a publicly quoted company, with effect from 30 April 2026.

Investors - London Media - London

Rosario Orchard rorchard@antofagasta.co.uk Sara Powell antofagasta@fticonsulting.com

Robert Simmons rsimmons@antofagasta.co.uk Ben Brewerton

Telephone +44 20 7808 0988 Nick Hennis

Telephone +44 20 3727 1000

Media - Santiago

Pablo Orozco porozco@aminerals.cl

Carolina Pica cpica@aminerals.cl

Telephone +56 2 2798 7000

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