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, 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 jurisdict ...

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, 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 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 (State or other ...

Financial Data and Key Metrics Changes - The updated financial guidance for 2021 projects net income in the range of $204 million to $209 million and earnings per diluted share between $3.80 and $3.90 [8] - Actual net income for Q3 2021 was $20.3 million or $0.38 per diluted share, compared to $21.1 million or $0.39 per diluted share in Q3 2020 [9] - Operating costs increased by $6.1 million year-over-year, primarily due to higher outside services, employee-related costs, and bad debt expense [10] Business Line Data and Key Metrics Changes - The net margin increased by $10.4 million year-over-year, mainly due to $7 million from new rates and $2.1 million from net residential customer growth [9] - Capital expenditures and asset removal costs were $20.6 million higher quarter-over-quarter, with a total capital plan of $540 million for the year [8][11] Market Data and Key Metrics Changes - The authorized rate base is approximately $4 billion as of September 30, with projections for the average rate base in 2021 to be around $4.34 billion, distributed as 41% in Oklahoma, 29% in Kansas, and 30% in Texas [12] Company Strategy and Development Direction - The company is focused on enhancing winter preparedness capabilities, including increased storage capacity and transportation capacity to improve system reliability [29] - The company is actively pursuing renewable natural gas (RNG) projects, with four biogas development agreements executed, expected to produce up to 700,000 MMBTU of RNG per year [27] Management's Comments on Operating Environment and Future Outlook - Management expressed optimism about the role of natural gas in a cleaner energy future, supported by organic growth and a resilient system [37] - The company has achieved a 93% customer satisfaction score and is committed to improving employee safety and diversity [38][39] Other Important Information - The company declared a dividend of $0.58 per share, unchanged from the previous quarter [15] - The securitization process is progressing across all three states, with hearings scheduled to approve financing orders [17][20] Q&A Session Summary Question: Inquiry on ESG report and carbon reduction targets - Management acknowledged the importance of ESG and indicated that they align with industry peers on emissions reduction goals, emphasizing the need for clear pathways to achieve these targets [46][48] Question: Clarification on securitization revenue and CapEx management - Management explained that securitization will be off-balance sheet in most areas, with specific recovery periods outlined for customer impacts, while maintaining a focus on system integrity and growth [59][62]

Financial Data and Key Metrics Changes - Net income for Q2 2021 was $30.1 million or $0.56 per diluted share, compared to $25.3 million or $0.48 per diluted share in Q2 2020, reflecting an increase in net margin of $11.1 million driven by new rates and customer growth in Texas and Oklahoma [9][10] - Operating costs increased by $1.2 million year-over-year, primarily due to higher outside services and employee-related costs, but were offset by lower bad debt expense and decreased COVID-19 related expenses [9][10] - The company reaffirmed its 2021 financial guidance, projecting net income between $198 million to $210 million and earnings per diluted share of $3.68 to $3.92 [11] Business Line Data and Key Metrics Changes - The authorized rate base as of June 30 was approximately $4 billion, with projections for the estimated average rate base in 2021 to be around $4.23 billion, distributed as 42% in Oklahoma, 29% in Kansas, and 29% in Texas [10][11] - The company resumed collections activity, leading to a 44% decline in past due balances since March 31, indicating effective management of customer accounts [18] Market Data and Key Metrics Changes - The company reported robust customer growth and opportunities for investment, particularly in markets like Austin, El Paso, Oklahoma City, and Tulsa, which are experiencing high demand for housing and natural gas services [18] Company Strategy and Development Direction - ONE Gas emphasized its commitment to safety, stable cash flow, and a focused business strategy as central to its sustainable business model [7] - The company is actively pursuing renewable natural gas (RNG) initiatives and has requested capital investments for renewable projects as part of its gas supply portfolio [16][19] - Legislative achievements include the passage of energy choice legislation and safety bills aimed at improving service reliability and safety for customers [15] Management's Comments on Operating Environment and Future Outlook - Management acknowledged the ongoing impacts of COVID-19 but noted that year-over-year impacts are moderating, with a focus on executing their strategy despite challenges [9][10] - The leadership transition was described as seamless, with a focus on system modernization, growth, and innovation as key priorities moving forward [22][23] Other Important Information - The company has deferred nearly $2 billion in costs related to Winter Storm Uri, which are included in regulatory assets on the balance sheet [11][12] - The company increased the capacity of its commercial paper program to $1 billion and ended the quarter with $209 million in cash and cash equivalents [11] Q&A Session Summary Question: What happened in the city of El Paso regarding rate increases? - Management explained that the denial of the rate increase was unusual but clarified that the appeal process worked effectively, and new rates were approved [25] Question: What are the results of the RNG survey with Vanguard? - Management indicated that preliminary results are encouraging, and they are exploring opportunities for RNG projects while seeking to inject RNG into their system [26][27] Question: How does the company view the long-term potential of RNG? - Management acknowledged skepticism about the magnitude of RNG but emphasized its environmental benefits and the importance of being prepared for future developments in the sector [30][31] Question: What is the current dialogue with rating agencies? - Management noted that the rating agencies are on a negative outlook but are patient as they monitor the securitization process [43] Question: What feedback has been received regarding the Oklahoma rate case? - Management stated that responsive testimony is due in early September, which will provide insights into the positions of the commission staff and other intervenors [44]

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, 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 juris ...

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]