APPOINTMENT OF INDEPENDENT NON-EXECUTIVE DIRECTOR

NEWS RELEASE, 26 JUNE 2025

APPOINTMENT OF INDEPENDENT NON-EXECUTIVE DIRECTOR

Antofagasta plc (the "Company") announces that the Board of Directors (the "Board") of the Company has appointed Ignacio Bustamante as an Independent Non-Executive Director with effect from 1 July 2025.

Mr Bustamante brings over 30 years of mining senior leadership experience in the Americas, with a strong focus on corporate strategy, operational excellence, sustainability and business development. He currently serves as Head of Base Metals at Appian Capital Advisory LLP.

Previously, Mr Bustamante was CEO and Executive Director of Hochschild Mining plc, a London-listed silver and gold mining company with operations across the Americas. Prior to that, he held several senior executive positions in in the Hochschild Mining plc group in areas including operations, finance, and business development.

He has also served as a Non-Executive Director at Aclara Resources, Scotiabank Peru, and Profuturo AFP in Peru.

Mr Bustamante holds dual Bachelor of Science degrees in Business and Accounting from Universidad del Pacífico in Peru, and an MBA from Stanford University.

Mr Jean-Paul Luksic, Chairman of the Company, said today: "Following a comprehensive, externally facilitated search process, we are delighted that Ignacio has accepted our invitation to join the Board. His broad mining experience in the Americas will be of great benefit to the Company in the years ahead."

For the purposes of the UK Corporate Governance Code, Mr Bustamante is considered by the Board to be independent.

Save as disclosed above, there are no further disclosures required under Listing Rule 6.4.8 R in respect of Mr Bustamante.

Investors - London Media - London

Rosario Orchard [email protected] Carole Cable [email protected] 

Telephone +44 20 7808 0988 Telephone +44 20 7404 5959

Robert Simmons [email protected]

Telephone +44 20 7808 0988

Media - Santiago

Pablo Orozco [email protected] 

Carolina Pica [email protected]

Telephone +56 2 2798 7000