ONE Gas Announces Third Quarter 2025 Financial Results; Narrows 2025 Financial Guidance

Declares Fourth Quarter Dividend

Analyst call and webcast scheduled tomorrow, November 4 at 11 a.m. EST

TULSA, Okla., Nov. 3, 2025 /PRNewswire/ — ONE Gas, Inc. (NYSE: OGS) today announced its third quarter financial results, narrowed its 2025 financial guidance and declared its quarterly dividend.

“Our third-quarter performance reflects disciplined execution of our strategy and continued operational efficiency,” said Robert S. McAnnally, president and chief executive officer. “The narrowed financial outlook aligns with year-to-date results and reinforces our confidence in delivering full-year guidance. As we approach year-end, we remain focused on sustainable growth, prudent capital deployment and delivering long-term value for our shareholders.”

THIRD QUARTER 2025 FINANCIAL RESULTS & HIGHLIGHTS

• Third quarter 2025 net income was $26.5 million, or $0.44 per diluted share, compared with $19.3 million, or $0.34 per diluted share, in the third quarter 2024;
• Year-to-date 2025 net income was $177.9 million, or $2.94 per diluted share, compared with $145.8 million, or $2.56 per diluted share, in the same period last year;
• The Company narrowed its 2025 diluted earnings per share guidance to a range of $4.34 to $4.40, from a previous range of $4.32 to $4.42; and
• The board of directors declared a quarterly dividend of $0.67 per share ($2.68 annualized), payable on December 1, 2025, to shareholders of record at the close of business on November 14, 2025.

THIRD QUARTER 2025 FINANCIAL PERFORMANCE

ONE Gas reported operating income of $65.4 million in the third quarter, compared with $59.5 million in the third quarter 2024, which primarily reflects:

• an increase of $19.2 million from new rates; and
• an increase of $1.4 million in residential sales due primarily to net customer growth in Oklahoma and Texas.

The increases were partially offset by:

• an increase of $4.8 million in depreciation and amortization expense primarily from additional capital investment;
• an increase of $4.1 million due to ad valorem taxes;
• an increase of $3.8 million in employee-related costs; and
• an increase of $1.0 million due to outside services.

Excluding interest related to KGSS-I securitized bonds, interest expense, net decreased $3.4 million for the three months ended September 30, 2025, compared to the same period last year, primarily due to lower rates on commercial paper borrowings.

Income tax expense reflects credits for amortization of the regulatory liability associated with excess deferred income taxes (EDIT) of $1.7 million and $1.5 million for the three months ended September 30, 2025 and 2024, respectively.

Capital expenditures and asset removal costs were $207.6 million for the third quarter 2025 compared with $197.7 million in the same period last year, primarily representing expenditures for system integrity and extension of service to new areas.

YEAR-TO-DATE 2025 FINANCIAL PERFORMANCE

Operating income for the nine months ended September 30, 2025, was $317.7 million, compared with $274.6 million in 2024, which primarily reflects:

• an increase of $92.2 million from new rates; and
• an increase of $5.3 million in residential sales due primarily to net customer growth in Oklahoma and Texas.

These increases were partially offset by:

• an increase of $16.8 million in depreciation and amortization expense primarily from additional capital investment;
• an increase of $13.8 million due to ad valorem taxes;
• an increase of $12.8 million in employee-related costs;
• an increase of $2.5 million in insurance expense;
• an increase of $2.1 million in bad debt expense;
• an increase of $1.3 million in information technology expense; and
• a carrying charge of $2.9 million refunded to Oklahoma customers from the settlement of a disputed gas purchase invoice.

Excluding interest related to KGSS-I securitized bonds, interest expense, net for the nine months ended September 30, 2025 was in line with the same period last year.

Income tax expense includes a credit for amortization of the regulatory liability associated with EDIT of $11.9 million and $13.4 million for the nine months ended September 30, 2025 and 2024, respectively.

Capital expenditures and asset removal costs were $575.4 million for the nine-month 2025 period compared with $571.7 million in the same period last year, primarily representing expenditures for system integrity and extension of service to new areas.

REGULATORY ACTIVITIES UPDATE

In June 2025, Texas Gas Service filed a rate case for all customers in the Central-Gulf, West-North and Rio Grande Valley service areas, requesting a $41.1 million revenue increase and proposing to consolidate all service areas into a single division. Texas Gas Service filed this rate case directly with the cities in each service area, which includes the cities of Austin and El Paso, and the Railroad Commission of Texas (RRC) for the unincorporated areas. This filing is based on a 10.4 percent return on equity and a 59.9 percent common equity ratio. New rates are expected to take effect in the first quarter of 2026.

In April 2025, Texas Gas Service made a Gas Reliability Infrastructure Program filing for all customers in the Rio Grande Valley service area, requesting a $3.2 million increase to be effective in September 2025. In August 2025, the RRC approved an increase of $2.9 million, and new rates became effective in September 2025.

In April 2025, Kansas Gas Service submitted an application to the Kansas Corporation Commission (KCC) requesting an increase of approximately $7.2 million related to its Gas System Reliability Surcharge. In July 2025, the KCC approved a $7.2 million increase effective August 2025.

In February 2025, Oklahoma Natural Gas filed its annual Performance-Based Rate Change application for the test year ended December 2024. The filing included a requested $41.5 million base rate revenue increase, a $2.4 million energy efficiency incentive, and $13.2 million of estimated EDIT to be credited to customers in 2026. A settlement agreement was reached among the parties, which included a $41.1 million base rate revenue increase, a $2.4 million energy efficiency incentive, and $17.9 million of estimated EDIT to be credited to customers beginning in February 2026. Interim rates, subject to refund, were implemented in June 2025. The Oklahoma Corporation Commission issued a final order approving the settlement in July 2025.

2025 FINANCIAL GUIDANCE NARROWED

The Company narrowed its 2025 financial guidance, with net income expected to be in the range of $262 million to $266 million, compared with its previously announced range of $261 million to $267 million. Earnings per diluted share are expected to be approximately $4.34 to $4.40, compared with the previously announced range of $4.32 to $4.42. There was no change to the respective midpoints of the 2025 net income and earnings per share guidance, both of which remain 2.5% above the original guidance forecasts for the year.

Capital expenditures, including asset removal costs, are still expected to be approximately $750 million in 2025.

EARNINGS CONFERENCE CALL AND WEBCAST

The ONE Gas executive management team will host a conference call on Tuesday, November 4, 2025, at 11 a.m. Eastern Standard Time (10 a.m. Central Standard Time). The call also will be carried live on the ONE Gas website.

To participate in the telephone conference call, dial 833-470-1428, passcode 020289, or log on to www.onegas.com/investors and select Events and Presentations.

If you are unable to participate in the conference call or the webcast, a 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 866-813-9403, passcode 909340.

ONE Gas, Inc. (NYSE: OGS) is a 100% regulated natural gas utility, and trades on the New York Stock Exchange 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.

Some of the statements contained and incorporated in this news release are forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. The forward-looking statements relate to our anticipated financial performance, liquidity, management’s plans and objectives for our future operations, our business prospects, the outcome of regulatory and legal proceedings, market conditions and other matters. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995. The following discussion is intended to identify important factors that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Forward-looking statements include the items identified in the preceding paragraph, the information concerning possible or assumed future results of our operations and other statements contained or incorporated in this news release identified by words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “should,” “goal,” “forecast,” “guidance,” “could,” “may,” “continue,” “might,” “potential,” “scheduled,” “likely,” and other words and terms of similar meaning.

One should not place undue reliance on forward-looking statements, which are applicable only as of the date of this news release. Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by forward-looking statements. Those factors may affect our operations, costs, liquidity, markets, products, services and prices. In addition to any assumptions and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual results to differ materially from those contemplated in any forward-looking statement include, among others, the following:

• our ability to recover costs, income taxes and amounts equivalent to the cost of property, plant and equipment, regulatory assets and our allowed rate of return in our regulated rates or other recovery mechanisms;
• cyber-attacks, which, according to experts, continue to increase in volume and sophistication, or breaches of technology systems that could disrupt our operations or result in the loss or exposure of confidential or sensitive customer, employee, vendor, counterparty, or Company information; further, increased remote working arrangements have required enhancements and modifications to our information technology infrastructure (e.g. Internet, Virtual Private Network, remote collaboration systems, etc.), and any failures of the technologies, including third-party service providers, that facilitate working remotely could limit our ability to conduct ordinary operations or expose us to increased risk or effect of an attack;
• our ability to manage our operations and maintenance costs;
• changes in regulation of natural gas distribution services, particularly those in Oklahoma, Kansas and Texas;
• the economic climate and, particularly, its effect on the natural gas requirements of our residential and commercial customers;
• the length and severity of a pandemic or other health crisis which could significantly disrupt or prevent us from operating our business in the ordinary course for an extended period;
• competition from alternative forms of energy, including, but not limited to, electricity, solar power, wind power, geothermal energy and biofuels;
• adverse weather conditions and variations in weather, including seasonal effects on demand and/or supply, the occurrence of severe storms in the territories in which we operate, and climate change, and the related effects on supply, demand, and costs;
• indebtedness could make us more vulnerable to general adverse economic and industry conditions, limit our ability to borrow additional funds and/or place us at competitive disadvantage compared with competitors;
• our ability to secure reliable, competitively priced and flexible natural gas transportation and supply, including decisions by natural gas producers to reduce production or shut-in producing natural gas wells and expiration of existing supply and transportation and storage arrangements that are not replaced with contracts with similar terms and pricing;
• our ability to complete necessary or desirable expansion or infrastructure development projects, which may delay or prevent us from serving our customers or expanding our business;
• operational and mechanical hazards or interruptions;
• adverse labor relations;
• the effectiveness of our strategies to reduce earnings lag, revenue protection strategies and risk mitigation strategies, which may be affected by risks beyond our control such as commodity price volatility, counterparty performance or creditworthiness and interest rate risk;
• the capital-intensive nature of our business, and the availability of and access to, in general, funds to meet our debt obligations prior to or when they become due and to fund our operations and capital expenditures, either through (i) cash on hand, (ii) operating cash flow, or (iii) access to the capital markets and other sources of liquidity;
• our ability to obtain capital on commercially reasonable terms, or on terms acceptable to us, or at all;
• limitations on our operating flexibility, earnings and cash flows due to restrictions in our financing arrangements;
• cross-default provisions in our borrowing arrangements, which may lead to our inability to satisfy all of our outstanding obligations in the event of a default on our part;
• changes in the financial markets during the periods covered by the forward-looking statements, particularly those affecting the availability of capital and our ability to refinance existing debt and fund investments and acquisitions to execute our business strategy;
• actions of rating agencies, including the ratings of debt, general corporate ratings and changes in the rating agencies’ ratings criteria;
• changes in inflation and interest rates;
• our ability to recover the costs of natural gas purchased for our customers and any related financing required to support our purchase of natural gas supply;
• impact of potential impairment charges;
• volatility and changes in markets for natural gas and our ability to secure additional and sufficient liquidity on reasonable commercial terms to cover costs associated with such volatility;
• possible loss of local distribution company franchises or other adverse effects caused by the actions of municipalities;
• payment and performance by counterparties and customers as contracted and when due, including our counterparties maintaining ordinary course terms of supply and payments;
• changes in existing or the addition of new environmental, safety, tax, cybersecurity and other laws or regulations to which we and our subsidiaries are subject, including those that may require significant expenditures, significant increases in operating costs or, in the case of noncompliance, substantial fines or penalties;
• the effectiveness of our risk-management policies and procedures, and employees violating our risk-management policies;
• the uncertainty of estimates, including accruals and costs of environmental remediation;
• advances in technology, including technologies that increase efficiency or that improve electricity’s competitive position relative to natural gas;
• population growth rates and changes in the demographic patterns of the markets we serve in Oklahoma, Kansas and Texas, and economic conditions in these areas;
• acts of nature and naturally occurring disasters;
• political unrest and the potential effects of threatened or actual terrorism and war;
• the sufficiency of insurance coverage to cover losses;
• the effects of our strategies to reduce tax payments;
• changes in accounting standards;
• changes in corporate governance standards;
• existence of material weaknesses in our internal controls;
• our ability to comply with all covenants in our indentures and the ONE Gas Credit Agreement, a violation of which, if not cured in a timely manner, could trigger a default of our obligations;
• our ability to attract and retain talented employees, management and directors, and shortage of skilled-labor;
• unexpected increases in the costs of providing health care benefits, along with pension and postemployment health care benefits, as well as declines in the discount rates on, declines in the market value of the debt and equity securities of, and increases in funding requirements for, our defined benefit plans; and
• our ability to successfully complete merger, acquisition or divestiture plans, regulatory or other limitations imposed as a result of a merger, acquisition or divestiture, and the success of the business following a merger, acquisition or divestiture.

These factors are not necessarily all of the important factors that could cause actual results to differ materially from those expressed in any of our forward-looking statements. Other factors could also have material adverse effects on our future results. These and other risks are described in greater detail in Part 1, Item 1A, Risk Factors, in our Annual Report. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. Other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise.

APPENDIX

ONE Gas, Inc.


KGSS-I SECURITIZATION

In November 2022, Kansas Gas Service Securitization I, L.L.C. (KGSS-I) issued $336 million of securitized utility tariff bonds. KGSS-I used the proceeds from the issuance to purchase the Securitized Utility Tariff Property from Kansas Gas Service, pay for debt issuance costs, and reimburse Kansas Gas Service for upfront securitization costs paid on behalf of KGSS-I.

Revenues for the three months ended September 30, 2025, include $11.2 million associated with KGSS-I, which is offset by $7.6 million in operating and amortization expense and $3.6 million in interest expense, net. Compared to the same three month period last year, revenues increased $0.7 million, which was offset by a $1.1 million increase in operating and amortization expense and a $0.4 million decrease in interest expense, net.

Revenues for the nine months ended September 30, 2025, include $36.1 million associated with KGSS-I, which is offset by $24.8 million in operating and amortization expense and $11.1 in interest expense, net. Compared to the same nine month period last year, revenues increased $2.3 million, which was offset by a $3.4 million increase in amortization and operating expense and a $1.1 million decrease in interest expense, net.

The following table summarizes the impact of KGSS-I on the consolidated balance sheets, for the periods indicated:

The following table summarizes the impact of KGSS-I on the consolidated statements of income, for the periods indicated:

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SOURCE ONE Gas, Inc.

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