Publication of 2025 Annual Report AND
2026 Notice of Annual General Meeting

Antofagasta plc ("Antofagasta" or the "Company") has today published the following documents: the 2025 Annual Report and Accounts and the 2026 Notice of Annual General Meeting.

2025 Annual Report and Accounts and 2026 Notice of Annual General Meeting

In compliance with LR 6.4.1, the Company has submitted the following documents to the Financial Conduct Authority by uploading them to the National Storage Mechanism:

·      2025 Annual Report and Accounts

·      2026 Notice of Annual General Meeting

·      Form of Proxy for Ordinary Shareholders for Annual General Meeting

·      Form of Proxy for Preference Shareholders for Annual General Meeting

·      Letter to Shareholders regarding Electronic Communications

These documents will shortly be available for inspection in unedited full text at the National Storage Mechanism at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

The 2025 Annual Report and Accounts and 2026 Notice of Annual General Meeting are also available to view on the Group's website at www.antofagasta.co.uk.

This announcement is made in accordance with DTR 6.3.5R(1A).

Arrangements for 2026 Annual General Meeting

The Annual General Meeting will be held in-person at Church House Westminster, Dean's Yard, London SW1P 3NZ at 10:00am on Thursday 07 May 2026. The formal notice of the Annual General Meeting and resolutions to be proposed are set out in the Notice of Annual General Meeting.

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