IMPORTANT INFORMATION FOR SHAREHOLDERS

ARRANGEMENTS FOR 2021 ANNUAL GENERAL MEETING AND CLASS MEETINGS

THIS LETTER IS SUPPLEMENTARY TO, AND MUST BE READ IN CONJUNCTION WITH, THE NOTICE OF AGM AND CLASS MEETINGS DATED 24 MARCH 2021

Dear Shareholder
Antofagasta plc’s (the “Company’s”) Annual General Meeting (the “AGM”) is to be held at 2:00 pm on 12 May 2021 at the Company’s registered office: Cleveland House, 33 King Street, St James’s, London SW1Y 6RJ. Separate meetings of the ordinary shareholders and preference shareholders (the “Class Meetings”) will follow directly after the AGM.

COVID-19 Restrictions
In light of the ongoing COVID-19 pandemic and the UK Government’s restrictions on public gatherings, we currently expect shareholders will not be able to attend the AGM or Class Meetings in person. Shareholders who attempt to attend in person should expect to be refused entry.

The Company will ensure that the necessary quorum requirement is satisfied, but we do not expect the Directors or members of the Executive Committee to attend the meetings in person.

Remote Engagement
However, the Company is keen to ensure that shareholders have an opportunity to engage in the AGM and Class Meetings to the maximum extent possible. Accordingly, we will offer facilities for shareholders to watch and listen to the AGM (and the relevant Class Meeting(s)) via an audio and visual broadcast. The reverse side of this page contains details on accessing that broadcast.

The Directors and members of the Executive Committee will appear at the AGM by video-link and the Chairman and the CEO will each make a presentation. Shareholders will be able to ask questions, either in writing via the meeting website, or by telephone.

Voting
Unfortunately, due to constraints in the Company’s articles of association, shareholders are not able to vote at the AGM or Class Meetings via the website.

That said, the Board is keen to ensure that all shareholders exercise their right to vote and strongly recommends that you vote on all resolutions by submitting an online proxy appointment form, appointing the Chairman as your proxy, in accordance with paragraph 2 of the Important Notes to the Notice of AGM (set out on page 9), as early as possible and, in any event, by no later than 2:00 pm on 10 May 2021. We also recommend that you vote on the resolutions at the Class Meetings in the same way by submitting an online proxy appointment form in relation to the relevant Class Meeting(s) no later than 2:10 pm and 2:15 pm on 10 May 2021 for the Class Meetings of the ordinary shareholders and preference shareholders respectively. If you appoint a person other than the Chairman of the meetings as your proxy, that person is expected to be refused entry to the meetings and your votes will not be counted.

As you will see, the Company is proposing to adopt new articles of association at the AGM to permit the Company to take advantage of electronic voting at future meetings.

Next Steps
Shareholders should continue to monitor the Company’s website and announcements for any further updates regarding the AGM and the Class Meetings.

The Board would like to thank all shareholders for their understanding and we look forward to engaging with as many of you as possible at the AGM.

Julian Anderson
Company Secretary
Antofagasta plc
Cleveland House
33 King Street
St James’s
London
SW1Y 6RJ

31 March 2021

Antofagasta plc Shareholder Guide
Meeting ID: 186-696-263

Meeting Access
Shareholders can engage in the AGM and Class Meetings electronically, should they wish to do so. This can be done by accessing the meeting website: https://web.lumiagm.com  

This can be accessed online using most well-known internet browsers such as Internet Explorer (not compatible with versions 10 and below), Chrome, Firefox and Safari on a PC, laptop or internetenabled device such as a tablet or smartphone.

On accessing the meeting website, you will be asked to enter a Meeting ID which is: 186-696-263 

You will then be prompted to enter your unique shareholder reference number (SRN) and PIN. These can be found printed on your form of proxy.

Access to the meeting will be available from 1:30 pm on 12 May 2021.

Broadcast
The meetings will be broadcast in audio and visual format. Once logged in, and the meetings start, you will be able to watch and listen to the proceeding of the meetings on your device.

Questions
Shareholders attending electronically may ask questions by typing and submitting their question in writing or via telephone:

• In writing: Select the messaging icon from within the navigation bar and type your question at the bottom of the screen. To submit your question, click on the arrow icon to the right of the text box.
• By telephone: Full instructions will appear once you have logged into the website.

Requirements
An active internet connection is required at all times in order to allow you to watch and listen to the broadcast and to submit written questions. It is your responsibility to ensure you remain connected for the duration of the relevant meetings.

Click the link below to download the announcement in full.