Power of Attorney for Regina L. Gregory

The filing is a Power of Attorney document executed by Regina L. Gregory, Senior Vice President, General Counsel, and Assistant Secretary of ONE Gas, Inc. The document appoints Brian K. Shore, Vice President, Associate General Counsel and Secretary, and Stephanie McClanahan, Senior Paralegal, as attorneys-in-fact to execute and file Forms 3, 4, and 5 on her behalf in accordance with Section 16(a) of the Securities Exchange Act of 1934. The attorneys-in-fact are authorized to perform any necessary actions related to these filings, including completing and executing the forms and filing them with the SEC and any relevant stock exchanges. The Power of Attorney remains in effect until Gregory is no longer required to file these forms, unless revoked earlier in writing. The document also includes a confirming statement reiterating the authorization and revoking any prior special powers of attorney granted for the same purposes.