CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of NiSource Inc. of our report dated June 18, 2025, appearing in the Annual Report on Form 11-K of NiSource Inc. Retirement Savings Plan for the year ended December 31, 2024.
| /s/ McConnell & Jones LLP |
| Houston, Texas |
| November 7, 2025 |