Buenaventura Mining Co Inc was formed on September 7, 1953. It is engaged in the exploration, mining, concentration, smelting and marketing of polymetallic ores and metals. The Company currently operates the Uchucchacua, Orcopampa, Poracota, Julcani, Recuperada, Antapite, Ishihuinca, Mallay, Breapampa and Shila-Paula. It has a controlling interest in Sociedad Minera El Brocal S.A.A. ("El Brocal"), which operates the Colquijirca mining unit; Minera La Zanja S.R.L. ("La Zanja"), which operates La Zanja mining unit; and other units dedicated to mining activities, electricity and services. It produces refined gold and silver, either as dore bars or concentrates, and other metals such as lead, zinc and copper as concentrates that the Company distributes and sells locally and internationally. All of the Company's metal production is sold to smelters, traders and banks, either in concentrate or metal form, such as gold-silver concentrate, silver- lead concentrate, zinc concentrate, lead-gold-copper concentrate and gold and silver bullion. It competes with other mining companies and private individuals for the acquisition of mining concessions and leases in Peru and for the recruitment and retention of qualified employees. The Company's right to explore, extract, process and/or produce silver, gold and other metals is granted by the Peruvian government in the form of mining and processing concessions.