Transmissora Alianca de Energia Eletrica SA (Taesa), formerly Terna Participacoes SA, is a Brazil-based company involved in the electricity transmission. The Company specializes in the implementation, operation and maintenance of electric power transmission lines comprising the basic grid of the National Interconnected System (SIN). The Company holds approximately 30 transmission concessions in Brazil. In addition, it provides planning studies of transmission infrastructure, chemical analysis of materials, engineering services and technical support, among others. The Company operates through a number of subsidiaries, such as Nordeste Transmissora de Energia SA, Novatrans Energia SA and Sul Transmissora de Energia SA.