Duluth Metals Inc.

On January 20, 2015, Antofagasta plc completed the friendly acquisition of Duluth Metals Limited. Prior to the acquisition, Antofagasta and Duluth Metals were partners in the Twin Metals Minnesota joint venture, a proposed underground copper-nickel mining project in northeast Minnesota, USA.

For general investor inquiries regarding the Antofagasta acquisition of Duluth Metals, please see the Antofagasta Investor Relations contact page at: http://www.antofagasta.co.uk/investors/investor-contact.aspx.

Inquiries from Duluth Metals shareholders should be directed to Rami Chalabi, Associate, Bennett Jones, at: 416-777-6156 .

For further information on the Twin Metals Minnesota Project, please see: http://www.twin-metals.com.