ONE Gas director granted 1,700 deferred stock units

Siegel Yves C reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Siegel Yves C reported acquisition or exercise transactions in this Form 4 filing.

ONE Gas director Yves C. Siegel reported receiving a grant of 1,700 shares of Deferred Stock at a reference price of $82.35 per share. These Deferred Stock units are convertible into ONE Gas common stock on a 1-for-1 basis.

The award represents his annual stock retainer, which he elected to defer under ONE Gas' Deferred Compensation Plan for Non-Employee Directors. After this grant, Siegel holds 5,447 Deferred Stock units directly, which will be settled in ONE Gas common shares at the distribution date described in the plan.

Insider Trade Summary

Grant/Award: 1,700 shares

Grant/Award 1 txn

Insider Siegel Yves C

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Deferred Stock	1,700	$82.35	$140K

Holdings After Transaction: Deferred Stock — 5,447 contracts (Direct)

Footnotes (3)

1. F1. Shares of deferred stock are convertible into ONE Gas' common stock on a 1-for-1 ratio.
2. F2. Annual stock retainer elected to be deferred under ONE Gas' Deferred Compensation Plan for Non-Employee Directors.
3. F3. Deferred stock is accrued under ONE Gas' Deferred Compensation Plan for Non-Employee Directors (the "Plan") and is settled in shares of ONE Gas common stock at the distribution date described in the Plan.

Key Figures

Deferred Stock grant: 1,700 units Grant reference price: $82.35 per unit Total Deferred Stock holdings: 5,447 units +1 more

4 metrics

Deferred Stock grant 1,700 units Grant of Deferred Stock on May 21, 2026

Grant reference price $82.35 per unit Price per Deferred Stock unit in the grant

Total Deferred Stock holdings 5,447 units Deferred Stock directly owned after the transaction

Conversion ratio 1-for-1 Each Deferred Stock unit converts into one common share

Key Terms

Deferred Stock, Deferred Compensation Plan for Non-Employee Directors, distribution date

3 terms

Deferred Stock financial

"Shares of deferred stock are convertible into ONE Gas' common stock on a 1-for-1 ratio."

Deferred Compensation Plan for Non-Employee Directors financial

"Annual stock retainer elected to be deferred under ONE Gas' Deferred Compensation Plan for Non-Employee Directors."

distribution date financial

"settled in shares of ONE Gas common stock at the distribution date described in the Plan."

The distribution date is the day a company, fund, or trust actually pays out cash or other assets to its shareholders or unitholders. Think of it as the payday when owners receive dividends, interest, or capital gains distributions; it matters to investors because it determines when you get the money, can affect the security’s price that day, and has tax and cash-flow consequences.

FAQ

What insider transaction did Yves C. Siegel report for ONE Gas (OGS)?

Yves C. Siegel reported receiving 1,700 shares of Deferred Stock as a grant. The award forms part of his annual stock retainer and increases his Deferred Stock holdings to 5,447 units, all reported as directly owned.

How are Yves C. Siegel’s Deferred Stock units in ONE Gas (OGS) valued in this filing?

The 1,700 Deferred Stock units are reported at a reference price of $82.35 per share. This value reflects the grant’s per-unit price used in the Form 4 and helps indicate the dollar scale of the compensation award.

What does ONE Gas’ Deferred Stock convert into for director Yves C. Siegel?

The Deferred Stock converts into ONE Gas common stock on a 1-for-1 basis. Each Deferred Stock unit will be settled in one share of ONE Gas common stock at the distribution date specified in the Deferred Compensation Plan.

What plan governs Yves C. Siegel’s Deferred Stock award at ONE Gas (OGS)?

The award is accrued under ONE Gas’ Deferred Compensation Plan for Non-Employee Directors. Under this plan, Siegel’s annual stock retainer can be deferred and is ultimately settled in shares of ONE Gas common stock at the plan’s distribution date.

How many ONE Gas Deferred Stock units does Yves C. Siegel hold after this grant?

Following the Form 4 transaction, Yves C. Siegel holds 5,447 Deferred Stock units. These units are directly owned and will be settled in ONE Gas common stock on a 1-for-1 basis in accordance with the company’s Deferred Compensation Plan.

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Accepted by SEC EDGAR 05/26/2026 - 04:15 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^*

Siegel Yves C

(Last) (First) (Middle)

15 E. 5TH STREET

(Street)

TULSA OKLAHOMA 74103

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ONE Gas, Inc. [ OGS ]

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)
05/21/2026

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

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
Deferred Stock	(1)	05/21/2026		A(2)		1,700		(3)	(3)	Common stock, par value $0.01	1,700	$82.35	5,447	D

Explanation of Responses:

1. Shares of deferred stock are convertible into ONE Gas' common stock on a 1-for-1 ratio.

2. Annual stock retainer elected to be deferred under ONE Gas' Deferred Compensation Plan for Non-Employee Directors.

3. Deferred stock is accrued under ONE Gas' Deferred Compensation Plan for Non-Employee Directors (the "Plan") and is settled in shares of ONE Gas common stock at the distribution date described in the Plan.

	/s/ Brian K. Shore, Attorney-in-Fact for Yves C. Siegel	05/26/2026
	** 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)