NEWS RELEASE, 1 APRIL 2026

NOTIFICATION OF TRANSACTIONS BY PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES

This announcement is a notification made pursuant to Article 19 of the UK version of the EU Market Abuse Regulation 596/2014, which is part of UK law by virtue of the European Union (Withdrawal) Act 2018.

1.      Antofagasta plc (LEI: 213800MY6QVH4FVLD628) (the "Company") announces that, on 29 March 2026, awards calculated by reference to the value of ordinary shares of 5 pence each in the Company (ISIN: GB0000456144) ("Shares") were granted under the Antofagasta Long Term Incentive Plan (the "LTIP") to the Persons Discharging Managerial Responsibility ("PDMR") set out below:

These are awards granted under the LTIP which the Antofagasta group (the "Group") has established to reward senior executives in a way that aligns their interests with the interests of shareholders and with the Group's long-term strategic plan. Directors of the Company are not eligible to participate in the LTIP.

Awards granted under the LTIP are conditional rights to receive a cash payment by reference to the number of Shares relating to the relevant award which vests under the LTIP. The cash payment is determined by reference to the market value of the Shares at vesting. No Shares are issued to participants in the LTIP. No consideration was paid for the grant of any awards.

Performance awards are subject both to certain performance conditions, which are measured as of 31 December 2028, and to continued employment. Performance awards will normally vest three years following their grant date and only to the extent that the performance conditions relating to those awards, as measured on 31 December 2028, have been met.

Restricted awards are subject to continued employment and normally one third will vest in March 2027, one third in March 2028 and the final third in March 2029.

The above transaction took place outside of a trading venue.

2.         The Company announces that, on 29 March 2026, restricted awards granted under the LTIP on 29 March 2025 and calculated by reference to the value of Shares vested to the PDMRs set out below:

The market value of the Shares on the date the awards vested was £ 33.2767.

The above transaction took place outside of a trading venue. 

3.         The Company announces that, on 29 March 2026, restricted awards granted under the LTIP on 29 March 2024 and calculated by reference to the value of Shares vested to the PDMRs set out below:

The market value of the Shares on the date the awards vested was £ 33.2767.

The above transaction took place outside of a trading venue.

4.          The Company announces that, on 29 March 2026, restricted awards granted under the LTIP on 29 March 2023 and calculated by reference to the value of Shares vested to the PDMRs set out below:

The market value of the Shares on the date the awards vested was £ 33.2767.

The above transaction took place outside of a trading venue.

5.         The Company announces that, on 29 March 2026, performance awards granted under the LTIP on 29 March 2023 and calculated by reference to the value of Shares vested to the PDMRs set out below:

The overall performance score in connection with these awards was 97.3%.

The market value of the Shares on the date the awards vested was £ 33.2767.

The above transaction took place outside of a trading venue.

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

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                                                                                                                   Carolina Pica           [email protected]

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