On May 23, 2023, at the annual meeting of stockholders (the “Annual Meeting”) of NiSource Inc. (the “Company”), the Company’s stockholders approved an amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”) to increase the number of authorized shares of common stock from 600 million to 750 million and a corresponding increase to the number of authorized shares of all classes of capital stock from 620 million to 770 million.