The board of directors of NiSource Inc. (NYSE:NI) today declared a quarterly common stock dividend payment of $0.28 cents per share, payable August 20, 2025, to stockholders of record at the close of business on July 31, 2025.

About NiSource

NiSource Inc. (NYSE:NI) is one of the largest fully-regulated utility companies in the United States, serving approximately 3.3 million natural gas customers and 500,000 electric customers across six states through its local Columbia Gas and NIPSCO brands. The mission of our approximately 7,700 employees is to deliver safe, reliable energy that drives value to our customers. NiSource is a member of the Dow Jones Sustainability - North America Index and is on Forbes lists of America's Best Employers for Women and Diversity. Learn more about NiSource's record of leadership in sustainability, investments in the communities it serves and how we live our vision to be an innovative and trusted energy partner at www.NiSource.com.

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FOR ADDITIONAL INFORMATION

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Kristen King

Finance Communications

(380) 268-3023

kking@nisource.com

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