Compania de Minas Buenaventura. 

Compañía de Minas Buenaventura S.A.A. engages in the exploration, mining development, processing, and trading of precious and base metals. The company explores for gold, silver, lead, zinc, and copper metals. It operates operating mining units, including Tambomayo located in the Caylloma province, Orcopampa Unit located in the province of Castilla, Uchucchacua located in province of Oyón, Julcani located in province of Angaraes, Peru, as well as San Gabrie located in the province of General Sánchez Cerro, in the Moquegua region. The company also owns interests in Colquijirca, La Zanja, Yanacocha, Cerro Verde, El Brocal, Coimolache, Yumpaq, San Gregorio mines, and Trapiche mining unit. In addition, it produces manganese sulphate monohydrate and other by-products generated from minerals; and operates hydroelectric power plants. The company was incorporated in 1953 and is based in Lima, Peru.