CompañÃa de Minas Buenaventura S.A.A., a precious metals company, engages in the exploration, mining, and processing of gold, silver, lead, zinc, and copper metals in Peru, the United States, Europe, and Asia. The company operates four operating mining units, including Uchucchacua, Orcopampa, Julcani, and Tambomayo in Peru; and San Gabriel, a mining unit under development stage. It also owns interests in Colquijirca-Marcapunta, Tantahuatay, La Zanja, Yanacocha, Cerro Verde, Yumpag, Ccelloccasa, San Gregorio, and Tambomayo mines, as well as Trapiche, a mining unit at the development stage. In addition, the company produces manganese sulphate, which is used in agriculture and mining industries. Further, it provides electrical transmission services; energy generation services through hydroelectric power plants; and insurance brokerage services, as well as processes chemicals. The company was founded in 1953 and is based in Lima, Peru.