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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

(Date of report)			April 7, 2026
(Date of earliest event reported)			April 7, 2026

ONE Gas, Inc.

(Exact name of registrant as specified in its charter)

Oklahoma

001-36108

46-3561936

(State or other jurisdiction

(Commission

(IRS Employer

of incorporation)

File Number)

Identification No.)

15 East Fifth Street; Tulsa, OK

(Address of principal executive offices)

74103

(Zip code)

(918) 947-7000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol

Name of each exchange on which registered

Common Stock, par value $0.01 per share

OGS

New York Stock Exchange

NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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Item 7.01						Regulation FD Disclosure
						On April 7, 2026, we announced we will release our first quarter 2026 financial results after the market closes on Monday, May 4, 2026, and will host a conference call at 11 a.m. Eastern Daylight Time (10 a.m. Central Daylight Time) on Tuesday, May 5, 2026. The call will also be carried live on our website. A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. The information disclosed in Item 7.01, including Exhibit 99.1 hereto, is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act except as expressly set forth by specific reference in such filing.
Item 9.01						Financial Statements and Exhibits
			(d)			Exhibits
Exhibit Number						Description
99.1						News release issued by ONE Gas, Inc. dated April 7, 2026.
104						Cover Page Interactive Data File (embedded within the Inline XBRL document).

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SIGNATURE

Pursuant to the requirements of the Exchange Act, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

									ONE Gas, Inc.
Date:			April 7, 2026			By:			/s/ Christopher P. Sighinolfi
									Christopher P. Sighinolfi Senior Vice President and Chief Financial Officer

Exhibit 99.1

April 7, 2026						Analyst Contact:			Erin Dailey 918-947-7411
						Media Contact:			Leah Harper 918-947-7123

ONE Gas First Quarter 2026

Conference Call and Webcast Scheduled

TULSA, Okla. – April 7, 2026 – ONE Gas, Inc. (NYSE: OGS) will release its first quarter 2026 financial results after the market closes on Monday, May 4, 2026.

The ONE Gas executive management team will participate in a conference call the following day, Tuesday, May 5, 2026, at 11 a.m. Eastern Daylight Time (10 a.m. Central Daylight Time).

The call will also be carried live on the ONE Gas website.

Event:			ONE Gas first quarter 2026 earnings conference call and webcast
Date and Time:			May 5, 2026 11 a.m. Eastern, 10 a.m. Central
Phone Number:			Dial 800-715-9871, pass code 3280987
Webcast Access:			www.onegas.com/investors and select Events and Presentations

If you are unable to participate in the conference call or the webcast, the replay will be available on the ONE Gas website, www.onegas.com, for 30 days. A recording will be available by phone for seven days. The playback call may be accessed at 1-800-770-2030, pass code 3280987.

ONE Gas, Inc. (NYSE: OGS) is a 100-percent regulated natural gas utility, and trades on the New York Stock Exchange and the NYSE Texas under the symbol "OGS." ONE Gas is included in the S&P MidCap 400 Index and is one of the largest natural gas utilities in the United States.

Headquartered in Tulsa, Oklahoma, ONE Gas provides a reliable and affordable energy choice to more than 2.3 million customers in Kansas, Oklahoma and Texas. Its divisions include Kansas Gas Service, the largest natural gas distributor in Kansas; Oklahoma Natural Gas, the largest in Oklahoma; and Texas Gas Service, the third largest in Texas, in terms of customers.

For more information and the latest news about ONE Gas, visit onegas.com and follow its social channels: @ONEGas, Facebook, LinkedIn and YouTube.

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