NEWS RELEASE, 8 MAY 2024

ANTOFAGASTA PLC

RESULTS OF 2024 ANNUAL GENERAL MEETING

At today's Annual General Meeting, a poll was held on each of the resolutions proposed in the Notice of Meeting dated 20 March 2024.

The results of the polls are:

Notes to the poll results

1.            Any proxy votes that were at the discretion of the Chairman are included in the total of "votes for" each resolution.

2.            Percentages of votes for and votes against each resolution are included on the basis of votes cast and therefore exclude abstentions.

3.            The Company had in issue 985,856,695 Ordinary Shares carrying one vote each, and 2,000,000 5% Cumulative Preference Shares carrying 100 votes each. Accordingly, the total number of votes available was 1,185,856,695 votes and the total number of votes available excluding the controlling shareholders was 350,086,090 votes at the Annual General Meeting.

4.            "Votes Cast as % of Issued Share Capital" represents the percentage of votes cast as a percentage of all votes that could have been cast on the resolution.

These results have been published on the Company's website (www.antofagasta.co.uk).

In accordance with Listing Rule 9.6.2, copies of resolutions 17, 18, 19, 20 and 21 passed at the Annual General Meeting will be submitted to the National Storage Mechanism today and will shortly be available for inspection at https://www.fca.org.uk/markets/primary-markets/regulatory-disclosures/national-storage-mechanism.

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Cautionary Statement

This announcement contains certain forward-looking statements. All statements other than historical facts are forward-looking statements. Examples of forward-looking statements include, without limitation, those regarding the Group's strategy, plans, objectives or future operating or financial performance, reserve and resource estimates, commodity demand and trends in commodity prices, growth opportunities, and any assumptions underlying or relating to any of the foregoing. Words such as "intend", "aim", "project", "anticipate", "estimate", "plan", "believe", "expect", "may", "should", "will", "continue" and similar expressions identify 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, performance or achievements could differ materially from any future results, performance or achievements expressed or implied by these forward-looking statements, which apply only as at the date of this report. These forward-looking statements are based on numerous assumptions regarding the Group's present and future business strategies and the environment in which the Group will operate in the future. Important factors that could cause actual results, performance or achievements to differ from those in the forward-looking statements include, but are not limited to: natural events, global economic and financial conditions (which may affect our business, results of operations or financial condition); various political, economic, legal, regulatory, social and other risks and uncertainties across jurisdictions in which the Group operates; changes to mining concessions or the imposition of new mining royalties, or changes to existing mining royalties in the jurisdictions in which the Group operates; the Group's ability to comply with the extensive body of regulations governing the mining industry, as well as the need to manage relationships with local communities; the ongoing effects of the global COVID-19 pandemic; demand, supply and prices for copper and other long-term commodity price assumptions (as they materially affect the timing and feasibility of future projects and developments); trends in the copper mining industry and conditions of the international copper markets; the effect of currency exchange rates on commodity prices and operating costs; the availability and costs associated with mining inputs and labour; operating or technical difficulties in connection with mining or development activities; risks, hazards and/or events and conditions inherent to the mining industry, which may affect our operations or facilities; employee relations; climate change as well as the effects of extreme weather conditions; the outcome of any litigation arbitration, regulatory or administrative proceedings to which the Group is and may be subject in the future; and actions and activities of governmental authorities, including changes to laws, regulations or taxation.

Except as required by applicable law, rule or regulation, the Group does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Past performance cannot be relied on as a guide to future performance.

No statement in this announcement is intended as a profit forecast or estimate for any period. No statement in this announcement should be interpreted to indicate a particular level of profit and, as a consequence, it should not be possible to derive a profit figure for any future period from this report.