NiSource Inc. is a fully regulated utility holding company based in Merrillville, Indiana, founded in 1987. The company focuses on providing energy distribution services to residential, commercial, and industrial customers in the United States. Through its Columbia Gas and NIPSCO brands, NiSource operates extensive natural gas distribution networks serving millions of customers across six states, making it one of the largest natural gas utility providers in the country. In addition to gas distribution, NiSource, via NIPSCO, delivers electric distribution, transmission, and generation services to customers in northern Indiana. Its electric portfolio includes capacity from coal, natural gas, and renewable energy sources, supporting regional reliability and grid stability. Operating within a fully regulated framework, NiSource plays a central role in local energy infrastructure, focusing on safe, reliable delivery of essential utility services and supporting everyday energy needs in the communities it serves.