NiSource Inc. operates as an energy holding company, primarily functioning as a regulated natural gas and electric utility within the United States. Its business activities are organized into two main divisions: Gas Distribution Operations and Electric Operations. The company's Gas Distribution segment delivers natural gas to approximately 853,000 customers across northern Indiana, and an additional 2.4 million residential, commercial, and industrial clients throughout Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. This extensive network includes about 54,600 miles of distribution main pipelines and customer service lines, along with 1,000 miles of transmission main pipelines. Through its Electric Operations, NiSource provides electricity to roughly 483,000 customers residing in 20 counties in northern Indiana, while also engaging in wholesale electricity and transmission transactions. The company maintains a diverse portfolio of power generation assets. These include coal-fired plants with capacities of 722 megawatts (MW) in Wheatfield and 455 MW in Michigan City; a 563 MW combined cycle gas turbine facility in West Terre Haute; natural gas generating units providing 155 MW in Wheatfield; hydroelectric plants contributing 9 MW in Carroll County and 7 MW in White County; and wind energy facilities in White County, Indiana, producing 102 MW and 302 MW, respectively. Originally founded in 1847, the company was known as NIPSCO Industries, Inc. before officially changing its name to NiSource Inc. in April 1999. Its corporate headquarters are located in Merrillville, Indiana.
