X0508 4 2024-01-25 0001111711 NISOURCE INC. NI 0001311411 Yates Lloyd M 801 E. 86TH AVE MERRILLVILLE IN 46410 1 1 Director and President & CEO 0 Common Stock 2024-01-25 4 A 0 62598 25.56 A 194018.401 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Company's common stock pursuant to the NiSource Inc. 2020 Omnibus Incentive Plan. Subject to certain forfeiture conditions, the RSUs will 100% vest on February 27, 2027, provided that the reporting person is continuously employed by the Company through and including that date. Includes shares acquired through the NiSource Inc. Employee Stock Purchase Plan through December 31, 2023. /s/ Kimberly S. Cuccia, Attorney-in-Fact 2024-01-26