NiSource, Inc. operates as an energy holding company, which through its subsidiaries, engages in the provision of natural gas, electricity, and other products and services. It operates through the Gas Distribution Operations and Electric Operations segments. The Gas Distribution Operations segment focuses on the provision of natural gas service and transportation for residential, commercial, and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, Maryland, and Massachusetts. The Electric Operations segment deals with the provision of electric service in 20 countries in the northern part of Indiana and involves in wholesale and transmission transactions. The company was founded in 1987 and is headquartered in Merrillville, IN.