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

Paresh Bhanderi                  pbhanderi@antofagasta.co.uk         Robin Wrench          antofagasta@brunswickgroup.com

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

Investors - Santiago                                                                               Media - Santiago

Alfredo Atucha                        aatucha@aminerals.cl                           Pablo Orozco             porozco@aminerals.cl 

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

                                                                                                                Telephone                 +56 2 2798 7000