NiSource Inc. NI

NI Company Overview

NiSource Inc. is a U.S.-based energy holding company that operates regulated natural gas and electric utilities through its principal subsidiaries, primarily Columbia Gas and NIPSCO (Northern Indiana Public Service Company). The company operates in the utility and energy infrastructure sectors, providing natural gas distribution, natural gas transportation, and electric generation and transmission services to residential, commercial, and industrial customers. NiSource’s core revenue drivers are regulated utility operations, where earnings are largely determined through state-approved rate structures and infrastructure investment recovery mechanisms.

The company serves millions of customers across multiple Midwestern and Mid-Atlantic states, with a strong concentration in natural gas distribution and integrated electric utility operations in Indiana. NiSource has historically emphasized long-term infrastructure modernization, grid reliability, and safety investments as strategic differentiators. The company traces its roots to the early 20th century through predecessor utility businesses, later consolidating under NiSource in 1912. Over time, it evolved from a diversified utility holding company into a more focused regulated utility operator following asset divestitures and strategic restructuring initiatives.