NEWS RELEASE, 09 AUGUST 2023

CHANGE OF SENIOR INDEPENDENT DIRECTOR

Antofagasta plc (the "Company") announces that Francisca Castro, a Non-Executive Director of the Company since 2016, has been appointed Senior Independent Director with effect from 8 August 2023.

Ms. Castro is the Chair of the Remuneration and Talent Management Committee and member of the Audit and Risk Committee and Nomination and Governance Committee.

Ms. Castro succeeds Mr. Tony Jensen in this role. Mr. Jensen has served as the Senior Independent Director since 1 August 2021 and will continue to serve as Chair of the Audit and Risk Committee, and as a member of the Nomination and Governance Committee and Remuneration and Talent Management Committee.

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