The Energy Company of Minas Gerais, or Cemig, is a Brazilian power company that generates, transmits, and distributes electricity. As one of the largest power companies in Brazil, the firm operates across the majority of Brazilian states and also operates in Chile. The company has various subsidiaries and operates chiefly through its generation, transmission, distribution, telecom, and gas segments. The majority of the company's revenue is derived from electricity sales to consumers. Cemig generates power primarily through hydroelectric resources and secondarily through thermal and wind resources.