NiSource, Inc. (NYSE: NI) is a publicly traded energy holding company headquartered in Merrillville, Indiana, that primarily owns and operates regulated local gas and electric utilities in the United States. Through its operating subsidiaries, the company delivers natural gas and electricity to residential, commercial and industrial customers and provides the associated distribution and transmission services that keep local energy systems functioning.
The company’s core activities include natural gas distribution, electric transmission and distribution, system operations, maintenance and emergency response. NiSource’s utilities perform meter services, billing and customer support, and undertake capital programs such as pipeline replacement, grid modernization and reliability improvements. The business emphasizes safe operation of infrastructure and compliance with state and federal regulatory requirements.
NiSource serves customers across multiple U.S. states, primarily in the Midwest and Northeast, where its businesses operate under locally recognized utility names and are subject to oversight by state public utility commissions. Its customer base spans urban, suburban and rural service territories and includes a mix of residential, commercial and industrial end users.
As a regulated utility holding company, NiSource focuses on long‑lived infrastructure investment, operational reliability and customer service while navigating regulatory processes and policy trends affecting the energy sector. The company’s strategic priorities typically center on improving system safety and resilience, modernizing distribution networks, and supporting customers’ energy needs—all within the framework of regulated utility operations.
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