Vectren Corporation is an energy holding company. Vectren's wholly owned subsidiary, Vectren Utility Holdings, Inc., serves as the intermediate holding company for three operating utilities: Indiana Gas Company, Inc. (Vectren North), Southern Indiana Gas and Electric Company (Vectren South), and Vectren Energy Delivery of Ohio. Vectren's Nonutility Group is involved in three primary business areas. Energy Marketing and Services markets natural gas (ProLiance Energy) and provides energy management services (Vectren Source). Coal Mining mines and sells coal (Vectren Fuels). Energy Infrastructure Services provides underground construction and repair services (Miller Pipeline) and energy performance contracting and renewable energy project services (Energy Systems Group).