Completion of sale of water division

FOR IMMEDIATE RELEASE, 3 JUNE 2015

COMPLETION OF SALE OF WATER DIVISION

Further to the announcement on 23 April 2015, Antofagasta plc is pleased to announce the completion of the sale of the water division, Aguas de Antofagasta S.A.to Empresas Públicas de Medellín, on 2 June 2015.

Investors - London Public Relations Advisors - London

Andrew Lindsay [email protected] Carole Cable [email protected]

Paresh Bhanderi [email protected] Robin Wrench [email protected]

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

Investors - Santiago Media - Santiago

Alfredo Atucha [email protected] Pablo Orozco [email protected] 

Telephone +56 2 2798 7000 Carolina Pica [email protected]

Telephone +56 2 2798 7000