ONE Gas to Participate in American Gas Association Mini-Forum, Announces Conference Attendance by CFO and Treasurer.

ONE Gas will participate in the American Gas Association Mini-Forum on September 15-16 in Boston. CFO Christopher Sighinolfi and Treasurer Mark Smith will conduct meetings with investors. The presentation materials are available on the ONE Gas website. ONE Gas is a 100%-regulated natural gas utility with operations in Kansas, Oklahoma, and Texas, serving over 2.3 million customers.

ONE Gas, Inc. (NYSE: OGS), a major regulated natural gas utility, has announced its participation in the American Gas Association Mini-Forum on September 15-16, 2025, in Boston. Christopher Sighinolfi, senior vice president and chief financial officer, and Mark Smith, vice president and treasurer, will conduct a series of meetings with members of the investment community during the event. The presentation materials utilized at the conference are accessible on the ONE Gas website, www.onegas.com/investors/events-and-presentations.

ONE Gas, Inc. is a 100-percent regulated natural gas utility that provides a reliable and affordable energy choice to more than 2.3 million customers in Kansas, Oklahoma, and Texas. The company is included in the S&P MidCap 400 Index and is one of the largest natural gas utilities in the United States. 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.

The American Gas Association Mini-Forum provides an opportunity for ONE Gas to engage with key stakeholders and discuss its strategic initiatives, financial performance, and regulatory activities. The company has a strong track record of financial stability, having reported robust earnings in recent quarters and increased its 2025 financial guidance. ONE Gas is also committed to sustainability, having achieved significant reductions in Scope 1 emissions and receiving recognition for its safety performance and workforce culture One Gas Inc Stock Price, News & Analysis^[2].

ONE Gas continues to expand its operations and invest in infrastructure to meet the growing demand for natural gas in its service territories. The company's participation in the Mini-Forum reflects its commitment to transparency and engagement with investors and stakeholders. For more information about ONE Gas and its upcoming events, visit onegas.com.