Site Visit: Centinela Second Concentrator

Site Visit

Centinela Second Concentrator

Antofagasta plc ("Antofagasta", or the "Company") is hosting an investor and analyst site tour on 5 November and 6 November 2025, at the Centinela Second Concentrator Project. 

As previously announced, the project remains on track and on budget.

During the tour, the Antofagasta team will provide insights on the Company's strategy, how it is being delivered safely and responsibly, and how innovation and technology are being used to drive performance.

The presentation materials will be made available during the course of the visit on the Company's website (https://www.antofagasta.co.uk), including a video showing the current progress at the Second Concentrator project, which can be viewed here.

Antofagasta announced its Q3 2025 Production Report including guidance for full-year 2026 production on 23 October 2025.

Investors - London Media - London

Rosario Orchard [email protected] Sara Powell [email protected]

Robert Simmons [email protected] Ben Brewerton

Telephone +44 20 7808 0988 Nick Hennis

Telephone +44 20 3727 1000

Media - Santiago

Pablo Orozco [email protected]

Carolina Pica [email protected]

 Telephone +56 2 2798 7000

Register on our website to receive our email alerts at the following address: https://www.antofagasta.co.uk/investors/news/email-alerts/

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Cautionary Statement

This announcement may contain certain forward-looking statements. All statements other than statements of historical fact are, or may be deemed to be, forward-looking statements.

These forward-looking statements are based upon current expectations and assumptions regarding anticipated developments and other factors affecting the Group. They are not historical facts, nor are they guarantees of future performance or outcomes. Readers should not place undue reliance on forward-looking statements.

Forward-looking statements involve known and unknown risks, uncertainties, assumptions and other factors that are beyond the Group's control. Given these risks, uncertainties and assumptions, actual results could differ materially from any future results expressed or implied by these forward-looking statements.

These forward-looking statements speak only as of the date of this document. Except as required by any applicable law or regulation, the Group expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in the Group's expectations with regard thereto or any change in events, conditions, or circumstances on which any such statement is based.

No assurance can be given that the forward-looking statements in this document will be realised. Past performance cannot be relied on as a guide to future performance.

This document does not contain or comprise profit forecasts, investment, accounting, legal, regulatory or tax advice nor is it an invitation for you to enter into any transaction. You are advised to exercise your own independent judgement (with the advice of your professional advisers as necessary) with respect to the risks and consequences of any matter contained herein.