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On March 16, 2021, ONE Gas, Inc., an Oklahoma corporation (“ONE Gas” or “we”) entered into a second amended and restated credit agreement (the “Credit Agreement”) with Bank of America, N.A., as administrative agent, swing line lender, a letter of credit issuer and a lender and the other lenders and letter of credit issuers parties thereto. The Credit Agreement amends and restates our current Amended and Restated Credit Agreement, dated as of October 5, 2017, by and among ONE Gas, Bank of America, N.A., as administrative agent, swingline lender, a letter of credit issuer and a lender and the other lenders and letter of credit issuers parties thereto.

The Credit Agreement provides for a $1 billion revolving unsecured credit facility, which includes a $20 million letter of credit sub-facility and a $60 million swingline sub-facility. The Credit Agreement will be available to provide liquidity for working capital, capital expenditures, acquisitions and mergers, the issuance of letters of credit and for other general corporate purposes.

The Credit Agreement matures on March 16, 2026. We will be able extend the maturity date, subject to the lenders’ consent, by one year up to two times.

The Credit Agreement contains customary conditions to borrowing, and customary affirmative and negative covenants, including a financial ratio maintenance covenant. The Credit Agreement also contains various customary events of default, the occurrence of which could result in a termination of the lenders’ commitments and the acceleration of all of our obligations thereunder.

The foregoing description of the Credit Agreement is not complete and is in all respects subject to the actual provisions thereof, a copy of which has been filed as Exhibit 10.1 to this Current Report on Form 8-K and which is incorporated by reference herein.

In connection with the Credit Agreement, on March 16, 2021, all commitments under that certain 364-day credit agreement, dated as of April 7, 2020 (the “364-Day Credit Agreement”), among ONE Gas, Bank of America, N.A., as administrative agent, and the lenders party thereto, were terminated and all obligations under the 364-Day Credit Agreement were paid in full and discharged.

As previously disclosed by ONE Gas in its Current Report on Form 8-K filed with the Securities and Exchange Commission on March 11, 2021, on March 11, 2021, ONE Gas completed an underwritten public offering of notes (the “Offering”). The net proceeds of the Offering reduced the commitments under the Term Loan Credit Agreement, dated as of February 22, 2021, among ONE Gas, the lenders from time to time party thereto and Bank of America, N.A., as administrative agent, on a dollar-for-dollar basis, and as a result no commitments remained outstanding and the facility was terminated concurrently with the closing of the Offering.

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/s/ Caron A. Lawhorn

Caron A. Lawhorn

Senior Vice President and

Chief Financial Officer