NISOURCE INC. — Director's Dealing 2025

May 14, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NISOURCE INC. (NI)
CIK: 0001111711
Period of Report: 2025-05-12

Reporting Person: Jesanis Michael E (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-12	Common Stock	A	4541	$38.32	Acquired	58908.618	Direct
2025-05-12	Common Stock	G	30189.569	—	Disposed	28719.049	Direct
2025-05-12	Common Stock	G	30189.569	—	Acquired	30189.569	Indirect

Footnotes

F1: Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation and which vests in full on the first anniversary of the grant date, subject to certain acceleration conditions. RSUs represent a contingent right to receive one share of the Company's common stock upon vesting pursuant to the Company's 2020 Omnibus Plan.

F2: This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards, and which are subject to the same vesting conditions as the underlying RSUs.

F3: This transaction involved the reporting person's gift/transfer of 30,189.569 shares of NiSource Inc. common stock to his spouse.

F4: This transaction involved the reporting person's gift/transfer of 30,189.569 shares of NiSource Inc. common stock to his spouse.