X0306 4 2023-01-25 0001111711 NISOURCE INC. NI 0001638426 Brown Donald Eugene NISOURCE INC. 801 E. 86TH AVENUE MERRILLVILLE IN 46410 1 EVP & CFO Common Stock 2023-01-25 4 A 0 9355 27.58 A 173413 D Common Stock 2358.0681 I 401(k) 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, 2026, provided that the reporting person is continuously employed by the Company through and including that date. Constitutes shares acquired through the NiSource Retirement Savings Plan through January 25, 2023. /s/ Kimberly S. Cuccia, Attorney-in-Fact 2023-01-27