Exhibit 99.1 August 5, 2025 Analyst Contact: Will Fiser 918-947-7331 Media Contact: Leah Harper 918-947-7123 ONE Gas Announces Second Quarter 2025 Financial Results; Increases 2025 Financial Guidance Declares Third Quarter Dividend Analyst call and webcast scheduled tomorrow, August 6 at 11 a.m. EDT TULSA, Okla. - Aug 5, 2025 - ONE Gas, Inc. (NYSE: OGS) today announced its second quarter financial results, increased its 2025 financial guidance and declared its quarterly dividend. "Our results and increased ...