Alumina Limited (Alumina), is an Australia-based company. The Company is the holding company of WMC Group. Alumina is engaged in investing in bauxite mining, alumina refining and selected aluminum smelting operations, through its 40% ownership of Alcoa World Alumina and Chemicals (AWAC). The Company�s partner, Alcoa, owns the remaining 60% of AWAC, and is the manager. The Company�s subsidiaries include Alumina Finance Limited, Alumina Holdings (USA) Inc., Alumina International Holdings Pty. Ltd., Alumina Brazil Holdings Pty Ltd, Alumina Limited Do Brasil SA, Alumina (U.S.A.) Inc., Butia Participacoes SA, Westminer Acquisition (U.K.) Limited, Westminer International (U.K.) Limited and Westminer (Investments) B.V.