NiSource (NYSE: NI) EVP Melody Birmingham sells 37,509 shares

Rhea-AI Filing Summary

NISOURCE INC. executive Melody Birmingham, EVP & Group President, Utilities, reported selling 37,509.173 shares of common stock on 2026-08-14 in an open-market or private transaction. The sale was executed at a weighted average price of $42.40 per share, with individual trade prices ranging from $42.39 to $42.42. Following this transaction, Birmingham directly holds 78,527.151 shares of NiSource common stock. The transaction was not reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 37,509.173 shares

Net Sell 1 txn

Insider BIRMINGHAM MELODY

Role EVP & Grp President, Utilities

Sold 37,509.173 shs ($1.59M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	37,509.173	$42.40	$1.59M

Holdings After Transaction: Common Stock — 78,527.151 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.39 to $42.42, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold: 37,509.173 shares Weighted average sale price: $42.40 per share Sale price range: $42.39 to $42.42 per share +1 more

4 metrics

Shares sold 37,509.173 shares Common stock sale on 2026-08-14 by Melody Birmingham

Weighted average sale price $42.40 per share Weighted average for multiple sale transactions on 2026-08-14

Sale price range $42.39 to $42.42 per share Range of individual trade prices within the reported sale

Shares held after transaction 78,527.151 shares Direct NI common stock ownership by Melody Birmingham following the sale

Key Terms

weighted average price, open market or private transaction, reporting person

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open market or private transaction financial

"transaction_code_description: Sale in open market or private transaction"

reporting person regulatory

"The reporting person undertakes to provide to NiSource Inc."

FAQ

What insider transaction did NI executive Melody Birmingham report on August 14, 2026?

Melody Birmingham reported a sale of 37,509.173 NI common shares on 2026-08-14. The transaction was coded as a sale in an open-market or private transaction and reduced her directly held position, though she still retains a substantial shareholding.

At what price did the NI shares sell in Melody Birmingham’s reported Form 4 transaction?

The reported transaction used a weighted average price of $42.40 per share. According to the footnote, the actual trade prices ranged from $42.39 to $42.42 per share across multiple executions on the transaction date.

How many NI shares does Melody Birmingham hold after the August 2026 sale?

After the reported sale, Melody Birmingham directly holds 78,527.151 shares of NiSource common stock. This figure reflects her post-transaction direct ownership reported in the Form 4 and shows she maintains a meaningful equity interest.

Was Melody Birmingham’s NI share sale made under a Rule 10b5-1 trading plan?

The Form 4 indicates the Rule 10b5-1 checkbox is not checked, so the sale was not reported as made under a Rule 10b5-1 plan. No footnote describes any pre-arranged trading arrangement for this transaction.

What does the weighted average price disclosure mean in Melody Birmingham’s NI Form 4?

The filing states that the $42.40 reported price is a weighted average. The shares were actually sold in multiple transactions at prices between $42.39 and $42.42, and full trade-level detail is available upon request.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/18/2026 - 04:24 PM Accepted by SEC EDGAR 08/18/2026 - 04:23 PM Learn about SEC filing dates

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^*

BIRMINGHAM MELODY

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Grp President, Utilities

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

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	08/14/2026		S		37,509.173(1)	D	$42.4	78,527.151	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.39 to $42.42, inclusive. The reporting person undertakes to provide to NiSource Inc., any security holder of NiSource Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Ashley Bancroft, Attorney-in-Fact	08/18/2026
	** 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)