NiSource director granted 3,807 RSUs as compensation

NISOURCE INC. director Peter Altabef received an equity grant in the form of restricted stock units as part of his annual compensation.

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Form Type

Rhea-AI Filing Summary

NISOURCE INC. director Peter Altabef received an equity grant in the form of restricted stock units as part of his annual compensation. The award covers 3,807 shares of common stock at a reference value of $47.03 per share, classified as a grant or other acquisition rather than an open-market purchase. These RSUs vest in full on the first anniversary of the grant date, subject to specified acceleration conditions, and represent a contingent right to receive one share of common stock for each unit under the company’s 2020 Omnibus Plan. The total reported direct holdings after this award are 56,615.459 shares, including RSUs credited through dividend equivalent provisions that follow the same vesting schedule.

Insider Trade Summary

Grant/Award: 3,807 shares

Grant/Award 1 txn

Insider ALTABEF PETER

Role Director

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

Holdings After Transaction: Common Stock — 56,615.459 shares (Direct)

Footnotes (2)

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.

Key Figures

RSU grant size: 3,807 shares Grant value per share: $47.03 per share Total holdings after grant: 56,615.459 shares +2 more

5 metrics

RSU grant size 3,807 shares Restricted stock unit award to director on May 11, 2026

Grant value per share $47.03 per share Reference value for RSU grant

Total holdings after grant 56,615.459 shares Director’s direct holdings following the RSU award

Acquire transactions 1 transaction Form 4 summary shows one acquisition-type entry

Buy and sell shares 0 shares No open-market buys or sells in this filing

Key Terms

restricted stock units ("RSU"), dividend equivalent provisions, 2020 Omnibus Plan

3 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"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity award did NiSource (NI) director Peter Altabef receive?

Director Peter Altabef received a grant of 3,807 restricted stock units as part of his annual compensation, each representing a contingent right to one NiSource common share under the company’s 2020 Omnibus Plan.

At what value were Peter Altabef’s NiSource RSUs granted?

The 3,807 restricted stock units were granted at a reference value of $47.03 per share. This value is used for award accounting purposes and does not represent an open-market purchase price by the director.

When do Peter Altabef’s NiSource restricted stock units vest?

The restricted stock units vest in full on the first anniversary of the grant date, subject to certain acceleration conditions. Upon vesting, each RSU converts into one share of NiSource common stock under the 2020 Omnibus Plan.

How many NiSource shares does Peter Altabef hold after this Form 4 transaction?

Following the reported RSU grant, Peter Altabef’s direct holdings total 56,615.459 shares of NiSource common stock. This figure includes RSUs, as well as additional units credited via dividend equivalent provisions tied to the awards.

What are dividend equivalent provisions mentioned in NiSource director RSU awards?

Dividend equivalent provisions credit additional RSUs when NiSource pays dividends, mirroring what a shareholder would receive. These additional RSUs are subject to the same vesting conditions as the original RSU awards and increase the director’s contingent share entitlement.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/13/2026 - 04:13 PM EDT

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^*

ALTABEF PETER

(Last)

(First)

(Middle)

NISOURCE INC.

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/11/2026		A		3,807⁽¹⁾	A	$47.03	56,615.459⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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)

Source: View Original Filing on SEC EDGAR