DTE Energy Co. (NYSE: DTE) is a diversified energy company involved in the development and management of energy-related businesses and services nationwide. Our largest operating subsidiaries are DTE Electric and DTE Gas. Together, these regulated utility companies provide electric and/or gas services to more than three million residential, business and industrial customers throughout Michigan. Our electric and gas utility businesses have each been in operation for over a century. We have leveraged that wealth of experience and assets to develop a number of non-utility subsidiaries which provide energy-related services to business and industry nationwide.