AES Tiet S.A. engages in the generation and distribution of electricity through operation of hydroelectric plants in Brazil. It operates 12 hydroelectric power plants located in the central and northwestern regions of the S o Paulo State with an installed capacity of 2,658 megawatts. The company was founded in 1999 and is headquartered in Barueri, Brazil. AES Tiet S.A. operates as a subsidiary of Companhia Brasiliana de Energia.