NISOURCE INC. — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NISOURCE INC. (NI)
CIK: 0001111711
Period of Report: 2026-02-27

Reporting Person: Anderson Shawn (EVP & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-27	Common Stock	A	32551	$47.30	Acquired	169393.298	Direct
2026-02-27	Common Stock	A	23883	$47.30	Acquired	193276.298	Direct
2026-02-27	Common Stock	F	13705	$47.30	Disposed	179571.298	Direct
2026-02-27	Common Stock	F	10056	$47.30	Disposed	169515.298	Direct
2026-02-27	Common Stock	F	4414	$47.30	Disposed	165101.298	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	811.5606	Indirect

Footnotes

F1: Vesting of non-derivative performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

F2: Vesting of non-derivative special performance stock units granted in 2023, which are exempt from liability under Section 16(b) of the Securities Exchange Act pursuant to rule 16b-3(d).

F3: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the performance stock units above.

F4: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vesting of the special performance stock units above.

F5: Number of shares reported represent shares withheld to satisfy tax withholding obligations in connection with the vestings of the 2023 Restricted Stock Unit awards.

F6: Includes shares acquired through dividend reinvestments.

F7: Constitutes shares acquired through the NiSource Inc. Retirement Savings Plan through February 27, 2026.