Alumina Limited is an Australia-based company, which invests in bauxite mining, aluminum smelting and alumina refining through Alcoa World Alumina and Chemicals (AWAC), its joint venture with Alcoa Corporation (Alcoa). The principal activities of the Company relate to its approximately 40% interest in the series of operating entities forming AWAC. The Company is the 40% partner in the AWAC joint venture whose assets comprise bauxite mines and alumina refineries in Australia, Brazil, Spain, Saudi Arabia, and Guinea. AWAC also has an approximately 55 per cent interest in the Portland aluminum smelter in Victoria, Australia. AWAC has an international network of alumina refineries in the United States, Brazil, Suriname, Spain, and Australia, and approximately 90% of this alumina goes to feed smelters that produce the aluminum used in transport, aerospace, building, construction and packaging.