Anglo American plc is one of the world's largest mining companies. Its portfolio of mining assets and natural resources include iron ore and manganese; metallurgical coal and thermal coal; copper and nickel; and precious metals and minerals. The company is present in South America since 1970, with current operations in Chile, Brazil, and Colombia. It also has the Quellaveco copper projects under consideration in Peru. Anglo American's copper operations in Chile and its ferronickel and iron ore operations in Brazil are managed through corporate offices in Santiago, Rio de Janeiro, and São Paulo. In Colombia, it has a 33% share of the world's largest open pit coal mining operation, Cerrejón. Anglo American was founded in 1917 and is based in London.