Alcoa Guinea
CBG was formed in 1963 by the Government of Guinea and Halco (Mining), Inc. (Halco) to develop bauxite in the Boké region. The Government of Guinea owns 49% and Boké Investment Company owns 51% of CBG. Halco owns of Boké Investment Company. Alcoa World Alumina LLC, a majorityowned subsidiary of Alcoa, owns 45% of Halco.