[Form 4] ONE Gas, Inc. Insider Trading Activity

Rhea-AI Filing Summary

ONE Gas executive William Kent Shortridge reported multiple equity award and vesting transactions. On February 14, 2026, performance and restricted units granted in 2023 under the Amended and Restated Equity Compensation Plan (2018) vested, with 1,956 performance units vesting at 76% of the original award based on total shareholder return versus a peer group, and 489 restricted units converting into common stock with associated dividend equivalents paid in shares.

These derivative awards were exercised into common stock, increasing his directly held common shares, while 815.716 and 238.932 shares of common stock were disposed to cover tax liabilities through share withholding, not open-market sales. On February 16, 2026, Shortridge also received new grants of 2,092 performance units and 1,395 restricted units that are scheduled to vest on February 17, 2029, subject to plan terms and, for the performance units, future relative total shareholder return over the period from January 1, 2026, through December 31, 2029. Following these transactions, he held 11,300.084 shares of common stock directly and 1,275 shares indirectly through a 401(k) plan.

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

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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^*

Shortridge William Kent

(Last) (First) (Middle)

15 E. 5TH STREET

(Street)

TULSA OK 74103

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/14/2026

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

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

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

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, par value $0.01	02/16/2026		M		1,659.639(1)	A	$86.04(1)	12,115.8	D
Common stock, par value $0.01	02/16/2026		F		815.716(1)	D	$86.04(1)	11,300.084	D
Common stock, par value $0.01	02/14/2026		M		545.934(2)	A	$86.04(2)	11,846.018	D
Common stock, par value $0.01	02/14/2026		F		238.932(2)	D	$86.04(2)	11,607.086	D
Common stock, par value $0.01								1,275	I	by 401(k) Plan

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
Performance Units 2023	(1)	02/16/2026		M			1,956	(1)	(1)	Common stock, par value $0.01	1,956	$86.04(1)	0	D
Restricted Units 2023	(2)	02/14/2026		M			489	(2)	(2)	Common stock, par value $0.01	489	$86.04(2)	0	D
Performance Units 2026	(3)	02/16/2026		A		2,092		(3)	(3)	Common stock, par value $0.01	2,092	$86.04(3)	2,092	D
Restricted Units 2026	(4)	02/16/2026		A		1,395		(4)	(4)	Common stock, par value $0.01	1,395	$86.04(4)	1,395	D

Explanation of Responses:

1. Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award, including dividend equivalents, vested on February 14, 2026, in an amount equal to 76% of the performance units awarded based upon Issuer's total shareholder return compared to the total shareholder return of a selected peer group, was certified by the Executive Compensation Committee of the Board of Directors on February 16, 2026, and issued pursuant to the terms of the grant agreement.

2. Restricted units awarded under Issuer's Amended and Restated Equity Compensation Plan (2018). During the 3-year vesting period, the award was credited with dividend equivalents that were paid out in shares of common stock at the time the underlying units vested and were issued. The shares were issued pursuant to the terms of the grant agreement.

3. Performance units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award will vest on February 17, 2029, for a percentage (0% to 200%) of the performance units awarded based upon the Issuer's total shareholder return compared to total stockholder return of a selected peer group over the performance period from January 1, 2026, through December 31, 2029, in accordance with the terms of the Performance Unit Award Agreement.

4. Restricted units awarded under the Issuer's Amended and Restated Equity Compensation Plan (2018). The award vests on February 17, 2029, in accordance with the terms of the Restricted Unit Award Agreement.

Remarks:

Senior Vice President, Operations and Customer Service

	/s/ Brian K. Shore, Attorney-in-Fact for William K. Shortridge	02/19/2026
	** Signature of Reporting Person	Date
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