NiSource Inc. is one of the largest regulated utility companies in the United States, primarily engaged in the distribution of natural gas and electricity. Through its subsidiaries, the company owns and operates an extensive network of pipelines, compressor stations, storage facilities and electric infrastructure. Its core business activities include safe delivery of natural gas to residential, commercial and industrial customers, maintenance and upgrade of aging utility assets, and investment in grid modernization and renewable energy integration.
Founded in 1912 and headquartered in Merrillville, Indiana, NiSource has evolved through a series of mergers and acquisitions to become a diversified utility holding company. Early on known as Northern Indiana Public Service Company, the enterprise adopted the NiSource name in 2000 to better reflect its multi-state presence. Over the decades, the company has focused on enhancing operational reliability and customer service, implementing advanced metering and pipeline safety programs to meet evolving regulatory standards.
NiSource serves nearly four million natural gas customers and more than 500,000 electric customers across eight states in the Northeast and Midwest, including Indiana, Kentucky, Ohio, Pennsylvania, Virginia and others. Its natural gas operations are conducted under well-known local brands such as Northern Indiana Public Service Company (NIPSCO), Columbia Gas of Pennsylvania, Columbia Gas of Ohio and Columbia Gas of Virginia. Through its electric subsidiary, the company provides distribution and transmission services tailored to both urban and rural communities.
Guided by an experienced executive leadership team based at its Merrillville headquarters, NiSource places strong emphasis on safety, environmental stewardship and regulatory compliance. The company’s governance framework includes a diverse board of directors and dedicated committees overseeing risk management, finance and corporate responsibility. NiSource continues to pursue strategic investments in infrastructure resilience, emissions reduction and digital innovation to support long-term value for customers, communities and shareholders.
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