The Antofagasta PLC, one of the most important conglomerates of Chile, controlled by majority shareholders Chile's Luksic Group holds a 50% interest in Tethyan Copper Company Limited (Tethyan); which has held a 75% interest in an exploration licence encompassing the Reko Diq deposit.
It is one of the most important conglomerates of Chile with equity participation in Antofagasta Minerals, the railroad from Antofagasta to Bolivia, Twin Metals in Minnesota and other exploration joint ventures in different parts from the world. Antofagasta is one of the major international copper producers with its activities concentrated mainly in Chile where it now operates four copper mines: Los Pelambres, Centinela (previously the Esperanza and Tesoro mines), Antucoya and Zaldivar (50% owned, 50% owned by the Canadian mining company Barrick Gold). Tethyan has held a 75% interest in an exploration licence encompassing the Reko Diq deposit, with the Government of Balochistan (the provincial authority) holding the remaining 25% interest, resulting in an effective interest for the Antofagasta group of 37.5%. The Antofagasta PLC controlled by majority shareholders Chile's Luksic Group holds a 50% interest in Tethyan Copper Company Limited ("Tethyan"), its joint venture with Barrick Gold Corporation ("Barrick"). 
