Final Dividend Payable

NEWS RELEASE, 4 MAY 2018

FINAL DIVIDEND PAYABLE

DIVIDEND NO. 45 - AMOUNT PAYABLE IN STERLING AND EURO

Further to the preliminary results announcement on 13 March 2018, the Sterling equivalent of the final dividend of 40.6 US cents will be 29.8205 pence per ordinary share, based on an exchange rate of £1 = US$1.3615, and the Euro equivalent will be 33.9097 Euro cents per ordinary share, based on an exchange rate of €1 = US$1.1973.

Payment of the dividend is scheduled for 25 May 2018.

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Investors - London Media - London

Andrew Lindsay alindsay@antofagasta.co.uk Carole Cable antofagasta@brunswickgroup.com

Telephone +44 20 7808 0983 Telephone +44 20 7404 5959

Andres Vergara avergara@antofagasta.co.uk Will Medvei antofagasta@brunswickgroup.com

Telephone +44 20 7808 0988 Telephone +44 20 7404 5959

Investors - Santiago Media - Santiago

Francisco Veloso fveloso@aminerals.cl Pablo Orozco porozco@aminerals.cl

Telephone +56 2 2798 7000 Carolina Pica cpica@aminerals.cl

Telephone +56 2 2798 7000

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