Guidance

2026 Financial Guidance

ONE Gas (the “Company”) expects 2026 net income to be in the range of $294million to $302million, with earnings per diluted share of $4.65 to $4.77. The midpoints of 2026 guidance are net income of $298million and earnings per diluted share of $4.71. The Company’s 2026 earnings guidance includes the benefit of new rates and customer growth, partially offset by higher operating expenses and depreciation expense from capital investments.

In February 2026, the Company introduced adjusted (non-GAAP) financial measures to supplement its GAAP guidance. ONE Gas expects 2026 adjusted net income to be in the range of $306 million to $314 million, with adjusted earnings per diluted share of $4.83 to $4.95. These adjusted measures are intended to provide additional insight into the Company’s performance and better reflect the timing of returns under its regulatory framework. This adjusted guidance is supplemental to, and not a replacement for, the Company’s GAAP guidance presented above.

The table below contains a reconciliation of the Company’s GAAP guidance to adjusted (non-GAAP) guidance.

  2026 Financial Guidance
 (Thousands) Low Mid High
Net income - GAAP $  294,000 $  298,000  $  302,000 
Other income - deferred carrying cost* 11,890   11,919    12,000 
Income taxes*   —    — 
 Adjusted net income - non-GAAP $  305,890  $  309,919  $  314,000 
       
Earnings per share - GAAP      
Basic $  4.67  $  4.73  $  4.79 
Diluted $  4.65  $  4.71  $  4.77 
       
Adjusted net income per share - non-GAAP      
Basic $  4.86  $  4.92  $  4.98 
Diluted $  4.83  $  4.89  $  4.95 
       
Average shares (thousands)      
Basic   62,995    62,995    62,995 
Diluted   63,350    63,350    63,350 

* The allowance for earnings on shareholders’ investment capitalized for regulatory purposes but not for financial reporting purposes applied to property, plant and equipment placed in service but not yet reflected in base rates as authorized by our regulators or state law. This increases book income but is non-taxable, creating a permanent tax difference.

Capital investments, including asset removal costs, are expected to be approximately $800million in 2026, primarily targeted for system integrity and replacement projects. Capital investments for extensions to new customers are expected to be approximately $230million, largely due to continued growth opportunities in Texas and Oklahoma. The anticipated average rate base for 2026 is $6.3billion.

ONE Gas expects to achieve an average annual dividend growth rate of 1% to 2% through 2030, subject to the board of directors’ approval.

Guidance estimates may be impacted by the variables listed in the forward-looking statements. For additional information that could cause actual results to differ materially from such forward-looking statements, refer to ONE Gas’ Securities and Exchange Commission filings.