PUBLICATION OF 2020 ANNUAL REPORT AND 2021 NOTICE OF ANNUAL GENERAL MEETING AND CLASS MEETINGS Antofagasta plc (the Company ) has today posted its 2020 Annual Report and Financial Statements and notice of the Annual General Meeting and class meetings of the Company (the 2021 Notice of AGM and Class Meetings ) to shareholders. The 2020 Annual Report and Financial Statements, which were approved by the Board of Directors on 15 March 2021, constitute the Company s statutory accounts for the purposes of section 434 of the Companies Act 2006 and the Annual Financial Report for the purposes of DTR 4.1. The Annual General Meeting will be held at the Company s offices at Cleveland House, 33 King Street, London SW1Y 6RJ on 12 May 2021 from 2 p.m. Separate meetings of the ordinary shareholders and preference shareholders (the Class Meetings ) will follow directly after the Annual General Meeting.