Antofagasta plc (Antofagasta) is a Chile-based copper mining company with interests in transport and water distribution. The Company operates in three segments: Mining, Transport and Water. The principal activities of the Company are copper mining (including exploration and development), the transportation of freight by rail and road and the distribution of water. Its mining operations produce copper with by-products of gold, molybdenum and silver. The Company�s segments include Los Pelambres, Esperanza, El Tesoro, Michilla, Antucoya, Exploration and evaluation, Railway and other transport services, Water concession, and Corporate and other items. In addition, the Company, through its subsidiary, Antofagasta Investment Company Limited, owns 100% ownership in the Twin Metals Minnesota Project (TMM), a copper-nickel-platinum-palladium-gold-silver project in north-eastern Minnesota, the United States.