NiSource (NYSE: NI) director receives 3,807-share RSU compensation award

Rhea-AI Filing Summary

Barbour Sondra L reported acquisition or exercise transactions in this Form 4 filing.

NiSource Inc. director Sondra L. Barbour received an award of 3,807 restricted stock units as part of her annual non-employee director compensation, valued at $47.03 per unit on the grant date. These RSUs vest in full on the first anniversary of the grant date, subject to certain acceleration conditions, and each represents a contingent right to receive one share of NiSource common stock upon vesting under the company’s 2020 Omnibus Plan.

The award amount also reflects RSUs credited under the dividend equivalent provisions of prior RSU awards, which vest on the same schedule as the underlying RSUs. Following this grant, Barbour’s directly held position, including RSUs, is reported at 29,197.331 shares of common stock and RSUs.

Insider Trade Summary

Net Buyer: 3,807 shares

Net Buy 1 txn

Insider Barbour Sondra L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,807	$47.03	$179K

Holdings After Transaction: Common Stock — 29,197.331 shares (Direct)

Footnotes (2)

1. 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.
2. 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.

Key Figures

RSU grant size: 3,807 RSUs Grant date price: $47.03 per unit Holdings after grant: 29,197.331 shares/RSUs +1 more

4 metrics

RSU grant size 3,807 RSUs Non-employee director annual compensation award

Grant date price $47.03 per unit Reference price for RSU award on grant date

Holdings after grant 29,197.331 shares/RSUs Total directly reported position following transaction

Vesting period 1 year RSUs vest in full on first anniversary of grant date

Key Terms

restricted stock units ("RSU"), dividend equivalent provisions, 2020 Omnibus Plan, non-employee director's annual compensation

4 terms

restricted stock units ("RSU") financial

"Represents an award of restricted stock units ("RSU") granted as part of the non-employee director's annual compensation"

dividend equivalent provisions financial

"This amount includes RSUs received pursuant to the dividend equivalent provisions of the RSU awards"

2020 Omnibus Plan financial

"upon vesting pursuant to the Company's 2020 Omnibus Plan"

non-employee director's annual compensation financial

"granted as part of the non-employee director's annual compensation and which vests in full"

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 05/13/2026 - 04:15 PM Learn about SEC filing dates

FAQ

What did NiSource (NI) director Sondra Barbour report in this Form 4?

Sondra L. Barbour reported receiving 3,807 restricted stock units as part of her annual non-employee director compensation. The RSUs were valued at $47.03 per unit on the grant date and increase her total reported direct holdings to 29,197.331 shares and RSUs.

How do the newly granted RSUs for NiSource (NI) vest?

The 3,807 restricted stock units vest in full on the first anniversary of the grant date, subject to certain acceleration conditions. Once vested, each RSU converts into one share of NiSource common stock under the company’s 2020 Omnibus Plan, providing equity-based compensation to the director.

Are dividend equivalents included in Sondra Barbour’s NiSource (NI) RSU holdings?

Yes. The reported amount includes RSUs received under dividend equivalent provisions tied to prior RSU awards. These dividend-equivalent RSUs follow the same vesting schedule and conditions as the underlying RSUs, effectively reinvesting dividends into additional contingent stock units for the director.

What is Sondra Barbour’s total reported NiSource (NI) position after this RSU grant?

After the grant, Sondra L. Barbour’s total directly reported position is 29,197.331 shares and RSUs of NiSource common stock. This figure combines previously held shares and outstanding RSUs, reflecting her aggregate equity-based interest reported in this Form 4 filing.

Is this NiSource (NI) Form 4 an open-market stock purchase or sale?

No. The filing reports a compensation-related grant of 3,807 restricted stock units coded as a grant, award, or other acquisition. It does not reflect an open-market purchase or sale, but rather equity awarded under NiSource’s 2020 Omnibus compensation plan for non-employee directors.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Barbour Sondra L

(Last) (First) (Middle)

801 E. 86TH AVENUE

(Street)

MERRILLVILLE INDIANA 46410

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NISOURCE INC. [ NI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/11/2026		A		3,807(1)	A	$47.03	29,197.331(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

	/s/ Ashley Bancroft, Attorney-in-Fact	05/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)