Alumina Limited is an Australia-based company engaged in investing in bauxite mining, alumina refining and aluminum smelter. The Company's business undertaking is in the global bauxite, alumina, and aluminum industry, which it conducts primarily through bauxite mining and alumina refining. The Company conducts these business activities through its joint venture, Alcoa World Alumina and Chemicals (AWAC). AWAC is a producer of alumina and bauxite miner. The Company provides bauxite mines and alumina refineries in Australia, Brazil, Spain, Saudi Arabia, and Guinea through its AWAC joint venture. AWAC holds 55% interest in the Portland aluminum smelter in Victoria, Australia.