Antofagasta PlcLSE: ANTO

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 April 2026, Andrónico Luksic Lederer, a Non-Executive Director since 1 March 2026, will join both the Sustainability and Stakeholder Management Committee and the Projects Committee.

From 1 April 2026, 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, Tony Jensen and Andrónico Luksic Lederer; and

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

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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