Resilient and Reliable Energy For a Better Tomorrow AMERICAN GAS ASSOCIATION FINANCIAL FORUM May 19 – 20, 2021 (2) (24/7 Forward-Looking Statements Statements contained in this presentation that include or refer to Company expectations, our business outlook, our future plans or predictions relating to any matters should be considered forward-looking statements that are covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, the Securities Act of 1933 and the Securities ...

Financial Data and Key Metrics Changes - Net income for Q1 2021 was $95.6 million or $1.79 per diluted share, compared to $91.7 million or $1.72 per diluted share in Q1 2020, reflecting an increase in net margin of $9.1 million year-over-year [12][14] - Operating costs increased by 6% or $7.2 million compared to the same period last year, primarily due to higher employee-related costs [16] - The company reaffirmed its 2021 financial guidance, including net income of $198 million to $210 million and earnings per diluted share of $3.68 to $3.92 [21] Business Line Data and Key Metrics Changes - Net margin was impacted by weather normalization adjustments, which were $3.1 million lower due to increased sales volumes not fully offsetting the weather effects [12][14] - Sales volumes increased less than 14% despite a 12% to 25% increase in heating degree days across the three states [14] Market Data and Key Metrics Changes - The company deferred approximately $2 billion in extraordinary costs related to Winter Storm Uri, with deferrals of $1.3 billion in Oklahoma, $381 million in Kansas, and $295 million in Texas [8][10] - The authorized rate base as of March 31 was approximately $3.8 billion, with projections for 2021 estimating an average rate base of $4.23 billion [19] Company Strategy and Development Direction - The company is pursuing a renewable natural gas alliance with Vanguard Renewables to develop farm-based RNG projects, enhancing its strategy to transport methane and reduce emissions [34][50] - The company is actively working on regulatory and legislative fronts to secure securitization of deferred costs from the winter storm, which is expected to provide a credit-positive financing vehicle [25][26] Management Comments on Operating Environment and Future Outlook - Management emphasized that the fundamentals of the business remain unchanged despite weather events, and they are focused on mitigating future supply chain risks [21][44] - The company is committed to reaching net zero emissions and is developing a strategy to optimize its gas delivery systems while investing in innovative solutions [46][50] Other Important Information - The company amended its revolving unsecured credit facility to $1 billion, expiring in March 2026, which enhances liquidity [19] - A dividend of $0.58 per share was declared, unchanged from the previous quarter [20] Q&A Session Summary Question: Customer bill impacts from securitization - Management indicated it is premature to determine customer bill impacts until initial filings are made with regulators, but they aim to minimize impacts while ensuring reasonable recovery periods [55] Question: Renewable natural gas (RNG) investment structure - Management stated that the initial phase involves assessing RNG sources across service territories, and all regulatory options for positioning these projects are being considered [56] Question: Impact of COVID-19 in Q1 and future expectations - Management reported no significant impact from COVID-19 in Q1, with bad debt expenses being monitored, and they do not expect material impacts for the rest of the year [60][61] Question: Discussions with regulators regarding gas supply - Management confirmed ongoing discussions with regulators about gas supply, with changes expected as they complete their post-incident review [63][64]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2021. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from __________ to __________. Commission file number 001-36108 ONE Gas, Inc. (Exact name of registrant as specified in its charter) Oklahoma 46-3561936 (State or other juri ...

STONE Gas DELIVERING NATURAL GAS FOR A BERET TOMORROW INVESTOR UPDATE March 2021 Forward-Looking Statements Statements contained in this presentation that include company expectations or predictions should be considered forward-looking statements that are covered by the safe harbor provisions of the Securities Act of 1933 and the Securities and Exchange Act of 1934. It is important to note that the actual results could differ materially from those projected in such forward-looking statements. For additional ...

Financial Data and Key Metrics Changes - ONE Gas reported diluted earnings per share of $1.09 for Q4 2020 and $3.68 for the full year, aligning with the revised guidance range of $3.66 to $3.70 [23] - Capital expenditures and asset removal costs for the year were $512 million, consistent with expectations [23] - A dividend of $0.58 per share was declared, marking a 7.4% increase from the previous dividend of $0.54 [23] Business Line Data and Key Metrics Changes - Residential sales net margin increased by 4% year-over-year, while commercial and industrial margins remained relatively flat [34] - Capital spending related to growth rose by 13% from 2019 to $144 million, driven by increased economic activity [35] - The company connected 26,400 new customers in 2020, up from 22,300 in 2019, achieving the highest number of meter installations in its history [36] Market Data and Key Metrics Changes - The spot price for natural gas in Oklahoma surged to over $1,200 per Mcf on February 18, compared to an average of $3.54 per Mcf in February of the previous year [18] - Approximately 900 out of 2.2 million customers lost service during the winter storm, with most outages lasting less than 24 hours [21] Company Strategy and Development Direction - The company is focused on improving system resilience, having completed 19 projects for new transmission supply points and 81 projects for system reinforcement since its founding in 2014 [12] - ONE Gas plans to maintain its 5-year growth outlook despite the financial impact of the recent weather event, with 2021 capital investments expected to be approximately $540 million [27][28] Management's Comments on Operating Environment and Future Outlook - Management acknowledged the unprecedented challenges posed by the winter storm and emphasized the importance of safety and resiliency in their operations [39] - The company is actively engaging with regulators regarding the recovery of extraordinary costs incurred during the winter storm, with discussions about potential securitization of these costs [29][31] Other Important Information - The company obtained a $2.5 billion 2-year term loan to enhance liquidity for meeting obligations related to gas purchases [25] - Moody's and S&P downgraded the company's credit ratings following the winter storm, with a negative outlook [26] Q&A Session Summary Question: Details on discussions with regulators regarding recovery of fuel costs - Management indicated that it is early in the process and that final gas costs will be filed once known, with no speculation on recovery periods at this time [43][44] Question: Legislative front on securitization - Conversations about potential legislation for securitization are ongoing, but no actual statutes are in place yet [46] Question: Short-term debt exclusion from regulatory cap structure - Current rate making includes long-term debt and equity, with carrying costs related to gas costs being considered for recovery [48] Question: Hedging program effectiveness during cold spike - Hedging programs were not effective in mitigating costs during the weather event due to reliance on daily pricing [51] Question: Conversations with rating agencies - Management noted that the extent of deferred costs is significant, and clarity on financing will be important for credit evaluations [52] Question: Investigating gas spot market pricing - There have been no direct conversations with regulators about investigating gas spot market pricing, but normal prudency reviews will occur [62] Question: Future gas supply plans and storage - The company will evaluate its gas supply plan and consider changes to its storage profile in response to the recent events [66]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020. OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________. Commission file number 001-36108 ONE Gas, Inc. (Exact name of registrant as specified in its charter) Oklahoma 46-3561936 (State or other jurisdict ...

Financial Data and Key Metrics Changes - The company updated its 2020 financial guidance, expecting net income to be between $186 million and $198 million, and earnings per diluted share to be between $3.44 and $3.68 [7] - Net income for Q3 2020 was $21.1 million or $0.39 per diluted share, compared to $17.5 million or $0.33 per diluted share in Q3 2019, reflecting a net margin increase of $5.2 million [8] - Operating costs increased by $0.8 million compared to the same period last year, primarily due to COVID-19 related expenses and employee costs [9] Business Line Data and Key Metrics Changes - The increase in net margin was primarily due to $3.7 million from new rates and $2.7 million from residential sales driven by customer growth [8] - Transport revenues and volumes for Q3 2020 were above the same period in 2019, with year-to-date transport revenues flat year-over-year [20] Market Data and Key Metrics Changes - The company reported an average of approximately 24,000 more sales customers year-to-date compared to the same period last year, with a 27% increase in new customer connections [22] - Economic activity is showing positive signs, particularly in Texas and Oklahoma, with over 100 new business relocations or expansions announced in the Austin area, expected to create over 14,000 new jobs [21] Company Strategy and Development Direction - The company is consolidating jurisdictions to improve efficiency, reducing the number of jurisdictions in Texas from 10 to 5 since the spin-off in 2014 [18] - The company is exploring renewable natural gas (RNG) projects and hydrogen production, indicating a commitment to decarbonization and innovation in energy solutions [48][50] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in being well-prepared for the winter heating season despite the ongoing pandemic, highlighting proactive measures taken for employee safety [38] - The company is monitoring bad debt expenses, which have increased to $8.8 million year-to-date compared to $4.6 million last year, indicating ongoing challenges related to COVID-19 [57] Other Important Information - The board declared a dividend of $0.54 per share, and the authorized rate base was approximately $3.71 billion as of September 30, 2020 [12] - The company has adequate liquidity, with approximately $391 million in its commercial paper program and no plans to issue equity for the remainder of 2020 [14] Q&A Session Summary Question: How is the company preparing for COVID-19 during the winter heating season? - Management has been preparing since March, implementing medical protocols to ensure employee and customer safety, and feels well-prepared for the upcoming challenges [38][39] Question: What is the trend in bad debt as the company heads into winter? - Bad debt expense is currently $8.8 million year-to-date, up from $4.6 million last year, with ongoing monitoring of the situation [57] Question: Is there a regulatory framework for investing in RNG across jurisdictions? - RNG is recoverable in Texas, and there are efforts in Oklahoma to study and potentially integrate RNG into the gas supply [60]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2020. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from __________ to __________. Commission file number 001-36108 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 15 Ea ...

ONE Gas, Inc. (NYSE:OGS) Q2 2020 Earnings Conference Call July 28, 2020 11:00 AM ET Company Participants Brandon Lohse - IR Pierce Norton - President and CEO Caron Lawhorn - SVP and CFO Curtis Dinan - SVP and Chief Commercial Officer Sid McAnnally - SVP and Chief Operating Officer Conference Call Participants Shar Pourreza - Guggenheim Partners Chris Sighinolfi - Jefferies Gabriel Moreen - Mizuho Harry Pollans - Bank of America Aga Zmigrodzka - UBS Brian Russo - Sidoti Operator Good day, and welcome to the ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2020. OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from __________ to __________. Commission file number 001-36108 ONE Gas, Inc. (Exact name of registrant as specified in its charter) Oklahoma 46-3561936 (State or other juris ...