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RESULTS OF 2026 ANNUAL GENERAL MEETING
Antofagasta PLC announced the results of its 2026 Annual General Meeting, where all resolutions were passed by a significant majority of shareholders. Key resolutions included the adoption of the 2025 Annual Report and Financial Statements with 1,104,043,653 votes for and 35,202 against, and the approval of the 2025 Remuneration Report with 1,081,551,379 votes for and 25,827,484 against. The company also received strong support for the re-election of directors, the declaration of a final dividend, and the re-appointment of Deloitte LLP as auditors. Resolutions concerning the allotment of securities and the purchase of own shares also passed, indicating shareholder confidence in the company's governance and operational authorities. Disclaimer*

About this update from Antofagasta Plc
ANTOFAGASTA PLC RESULTS OF 2026 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 19 March 2026. The results of the polls are: Resolution Votes For Votes Against Votes Cast as % of Issued Share Capital Votes withheld (1) Adopt the 2025 Annual Report and Financial Statements 1,104,043,653 35,202 93.10% 3,350,852 100.00% 0.00% (2) Approve the 2025 Remuneration Report 1,081,551,379 25,827,484 93.38% 50,844 97.67% 2.33% (3) Approve the 2026 Remuneration Policy 1,045,808,029 61,551,232 93.38% 70,446 94.44% 5.56% (4) Declare a final dividend 1,106,705,353 707,524 93.39% 16,830 99.94% 0.06% (5) Re-elect Jean-Paul Luksic as a Director 994,995,827 110,417,813 93.22% 2,016,067 90.01% 9.99% (6) Re-elect Francisca Castro as a Director 1,069,407,116 37,998,825 93.38% 23,766 96.57% 3.43% 238,754,986 * 37,998,825 * 86.27% * 13.73% * (7) Re-elect Ramón Jara as a Director 1,071,239,875 36,165,789 93.38% 24,043 96.73% 3.27% (8) Re-elect Juan Claro as a Director 1,095,198,897 12,206,760 93.38% 24,050 98.90% 1.10% (9) Re-elect Michael Anglin as a Director 1,105,714,064 1,691,817 93.38% 23,826 99.85% 0.15% 275,061,934 * 1,691,817 * 99.39% * 0.61% * (10) Re-elect Tony Jensen as a Director 1,094,397,536 13,008,353 93.38% 23,818 98.83% 1.17% 263,745,406 * 13,008,353 * 95.30% * 4.70% * (11) Re-elect Eugenia Parot as a Director 1,104,878,821 1,709,632 93.32% 841,254 99.85% 0.15% 274,226,691 * 1,709,632 * 99.38% * 0.62% ...