Energy Future Holdings Corp., formerly TXU Corp., is a Dallas-based, privately held energy company with a portfolio of competitive and regulated energy subsidiaries. TXU Energy, Luminant and Oncor, EFH's primary businesses, serve the high-growth Texas electricity market, which is one of world's largest and among the nation's most successful competitive markets. TXU Energy is a market-leading competitive retailer that provides electricity and related services to more than 2 million electricity customers. The company offers a variety of innovative products and solutions, including 24/7 customer service, competitively priced service plans, energy efficiency options and renewable energy programs. TXU Energy is providing superior value to customers across Texas.