CHANGES TO BOARD COMMITTEES

CHANGEs TO BOARD COMMITTEEs

In accordance with Listing Rule 6.4.6, Antofagasta plc (the "Company") announces that with effect from 1 September 2025, Ignacio Bustamante, an Independent Non-Executive Director since 1 July 2025, will join both the Audit and Risk Committee and the Remuneration and Talent Management Committee. In addition, Francisca Castro, an Independent Non-Executive Director since November 2016, will rotate off the Audit and Risk Committee.

From 1 September 2025, composition of the Committees shall be as follows:

· Nomination and Governance Committee: Jean-Paul Luksic (Chair), Francisca Castro and Tony Jensen;

· Audit and Risk Committee: Tony Jensen (Chair), Heather Lawrence, Tracey Kerr and Ignacio Bustamante;

· Remuneration and Talent Management Committee: Francisca Castro (Chair), Michael Anglin, Eugenia Parot, Heather Lawrence and Ignacio Bustamante;

· Projects Committee: Michael Anglin (Chair), Ramón Jara, Eugenia Parot and Tony Jensen; and

· Sustainability and Stakeholder Management Committee: Eugenia Parot (Chair), Ramón Jara, Juan Claro, Michael Anglin and Tracey Kerr.

Investors - London Media - London

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

Robert Simmons [email protected] Telephone +44 20 7404 5959

Telephone +44 20 7808 0988

Media - Santiago

Pablo Orozco [email protected]

Carolina Pica [email protected] 

Telephone +56 2 2798 7000

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