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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * NORTON PIERCE   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 __X__ Officer (give title below) _____ Other (specify below) See Remarks (Last) (First) (Middle) 15 E. 5TH STREET 3. Date of Earliest Transaction (Month/Day/Year) 02/21/2018 (Street) TULSA, OK 74103 4. If Amendment, Date 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 (City) (State) (Zip) 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 02/19/2018   M   51,997 (1) A $ 68.17 (1) 216,947 D   Common stock, par value $0.01 02/19/2018   F   23,061 (1) D $ 68.17 (1) 193,886 D   Common stock, par value $0.01 02/17/2018   M   6,513 (2) A $ 68.17 (2) 200,399 D   Common stock, par value $0.01 02/17/2018   F   2,910 (2) D $ 68.17 (2) 197,489 D

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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 Underlying Securities (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 of Derivative Security: 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 2015	(1)	02/19/2018		M			24,150	(1)	(1)	Common stock, par value $0.01	24,150	$ 68.17 (1)	0	D
Restricted Units 2015	(2)	02/17/2018		M			6,050	(2)	(2)	Common stock, par value $0.01	6,050	$ 68.17 (2)	0	D
Performance Units 2018	(3)	02/19/2018		A		20,537		(3)	(3)	Common stock, par value $0.01	20,537	$ 68.17 (3)	20,537	D
Restricted Units 2018	(4)	02/19/2018		A		5,134		(4)	(4)	Common stock, par value $0.01	5,134	$ 68.17 (4)	5,134	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
NORTON PIERCE 15 E. 5TH STREET TULSA, OK 74103	X		See Remarks

Signatures

/s/ Brian K. Shore, Attorney-in-Fact for Pierce H. Norton		02/21/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Performance units awarded under Issuer's Equity Compensation Plan. The award vested on February 17, 2018, and was certified by the Executive Compensation Committee of the Board of Directors on February 19, 2018. The award vested in an amount equal to 200% of the performance units awarded based upon Issuer's total shareholder return compared to total shareholder return of a selected peer group plus accrued dividends of 3,697 shares. The award was payable one share of Issuer's common stock for each vested performance unit and accrued dividends.
(2)	Restricted units awarded under Issuer's Equity Compensation Plan. The award vested on February 17, 2018. The award was payable one share of Issuer's common stock for each vested restricted unit and accrued dividends of 463 shares.
(3)	Performance units awarded under the Issuer's Equity Compensation Plan. The award will vest on February 13, 2021, 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. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out in shares of common stock at the time the underlying units vest and shares are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested performance unit and dividend equivalent.
(4)	Restricted units awarded under the Issuer's Equity Compensation Plan. The award vests on February 13, 2021. During the 3-year vesting period, the award will be credited with dividend equivalents that will be paid out in shares of common stock at the time the underlying units vest and are issued. The award and credited dividend equivalents will be payable one share of the Issuer's common stock for each vested restricted unit and dividend equivalent.
Remarks: President and Chief Executive Officer

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