Companhia Energetica de Minas Gerais Cemig is a Brazil-based holding company primarily engaged in the electricity sector. The Company is mainly active in the construction and operation of systems of production, transformation, transmission, distribution and commercialization of electric power. It is involved in the provision of telecommunication services, and purchase, transport and distribution of natural gas. It has a number of subsidiaries, including Cemig Geracao e Transmissao, which operates hydroelectric plants, thermoelectric plants, wind farms and transmission lines; Cemig Distribuicao SA, which is engaged in the electric power distribution; Companhia de Gas de Minas Gerais, which holds the concession for gas distribution in the state of Minas Gerais, and Cemig Telecomunicacoes SA, which provides telecommunication services, among others. In June 2013, it sold a total stake in it's concessionaires of transmission to Transmissora Alianca de Energia Eletrica SA (TAESA).