re: Interim dividend

For immediate release

Cleveland House Telephone: + 44 20 7808 0988

33 King Street, St James's Fax: + 44 20 7930 7578

London info@antofagasta.co.uk

SW1Y 6RJ

United Kingdom

Interim Dividend of 8.5 US cents per ordinary share - Dividend no 35 - amount payable in sterling and Euro

London, 20 September 2012

Further to the preliminary results announcement of 29 August 2012, the sterling equivalent of the interim dividend of 8.5 US cents will be 5.2382 pence per ordinary share, based on an exchange rate of £1 = US$ 1.6227, and the Euro equivalent will be 6.5079 Euro cents per ordinary share, based on an exchange rate of €1 = US$1.3061.

Payment of the dividend is scheduled for Thursday 4 October 2012.