One Gas, Inc. · NYSE:OGS

One Gas — UBS Midwest Utilities Mini-Conference (March 2025)

41 slides from One Gas's conference presentation, Mar 3, 2025

  1. Slide 1: Investor Update February and March 2025

    Investor Update February and March 2025

  2. Slide 2: About Us

    71% market share, the largest in Kansas About Us ONE Gas, Inc. (NYSE: OGS) is a 100-percent regulated natural gas utility 89% market share, the largest and is one of the largest natural gas utilities in the United States. in Oklahoma ONE Gas provides natural gas distribution services to approximatel

  3. Slide 3: Recent Highlights

    Recent Highlights Creating Value for a Better Tomorrow 2025 EPS guidance of We estimate $750 Replaced over 450 miles $4.20-$4.32 & 2025-29 million in 2025 capital of transmission, main EPS growth of 4-6% investments and service lines in 2024 ~23,300 new meter sets Increased storage to ~60 7th consec

  4. Slide 4: Our Strategy

    Our Strategy G ONE Gas

  5. Slide 5: Serving a Growing Customer Base

    Serving a Growing Customer Base Growing Demand for Natural Gas Provides Long-Term Growth Opportunity WSJ Top 25 “Hottest Job Economic growth creates durable residential and Markets” lists 4 cities in ONE commercial development and drives system Gas service territory1 expansion #5 Oklahoma City #7 Au

  6. Slide 6: Enhancing Capacity & Improving Operational Efficiency

    Enhancing Capacity & Improving Operational Efficiency Constructing a Foundation for Growth Improved processes and workforce investments increase operating capacity and capabilities Investment in workforce development fosters strong performance and retention Managing expenses helps preserve customer

  7. Slide 7: Financial Outlook

    Financial Outlook

  8. Slide 8: 2025 Guidance Summary

    2025 Guidance Summary1 Creating long-term value and serving a growing customer base EARNINGS OUTLOOK • Net income for 2025 in a range of $254 - $261 million • EPS range of $4.20 - $4.32 per diluted share • Assumes 60.5 million diluted shares outstanding CAPITAL INVESTMENTS • 2025 capital investments

  9. Slide 9: Financing Requirements

    Financing Requirements Maintaining Balance Sheet Strength 2025 dividends and capital investments primarily funded by cash flow from operations of approximately $600-$650 million1 • Expected 2025 short- and long-term financing need of $270-$300 million ~$1.5 billion net long-term financing needs thro

  10. Slide 10: Five-Year Financial Highlights

    Five-Year Financial Highlights Investing in a Reliable and Growing System CAPITAL INVESTMENTS & RATE BASE AVERAGE ANNUAL GROWTH RATES • Capital investments of approximately $4.0 billion • Based off 2024 actual EPS of $3.91 ̶ $2.8 billion investment in system integrity and • Long-term net income grow

  11. Slide 11: Long-Term EPS Performance & Outlook

    Long-Term EPS Performance & Outlook EPS CAGR 4-6% $5.50 $5.22 $5.00 $4.50 $4.26 $4.08 $4.14 $4.00 $3.85 $3.91 $3.68 $3.51 $3.50 $3.25 $3.08 $3.00 $2.65 $2.50 $2.24 $2.07 $2.00 $1.50 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025G 2029* Note: 2025 EPS represent the mid-point of the guida

  12. Slide 12: Balance Sheet Strength

    Balance Sheet Strength Strong credit rating and financing flexibility * REVOLVING CREDIT FACILITY SENIOR DEBT MATURITIES (MILLIONS) • $1.35 billion limit • Expires March 2028 COMMERCIAL PAPER PROGRAM • $1.35 billion limit * Excluding KGSS-I long-term debt associated with Winter Storm Uri of ~$287M a

  13. Slide 13: Capital Investments

    Capital Investments G ONE Gas

  14. Slide 14: Well-Defined Capital Investment Plan

    Well-Defined Capital Investment Plan Investments ~ 3x Depreciation CAPITAL INVESTMENTS 2025G CAPITAL INVESTMENTS (MILLIONS) BY STATE $762 (MILLIONS) $729 ~$750 $32 $31 $26 $658 $32 $178 $179 $178 Kansas $542 $21 $177 $552 $151 $525 $540 $138 Texas $449 $311 $383 $255 $283 Oklahoma $216 $234 $288 $20

  15. Slide 15: Capital Investments

    Capital Investments KANSAS OKLAHOMA TEXAS 2025G: 1.6X DEPRECIATION 2025G: 2.7X DEPRECIATION 2024G: 3.7X DEPRECIATION $306 $288 $311 $286 $287 $257 $256 $242 $215 $185 $188 $159 $169 $151 $139 (MILLIONS) $83 $108 $63 $71 $92 $93 $100 $48 $53 $75 $78 $84 $82 $88 $72 2021 2022 2023 2024 2025G 2021 2022

  16. Slide 16: Rate Base

    Rate Base AVERAGE RATE BASE* 2025G AVERAGE RATE BASE* (BILLIONS) BY STATE TOTAL: $5.8 BILLION $5.52 $5.80 $5.15 $4.69 $1.38 billion $4.25 $1.85 billion $2.57 billion 2021 2022 2023 2024 2025G Kansas Oklahoma Texas * See Appendix for definition ~5% growth expected in 2025 CAPITAL INVESTMENTS | 16

  17. Slide 17: Regulatory Update

    Regulatory Update G ONE Gas

  18. Slide 18: Active Regulatory Calendar

    Active Regulatory Calendar EQUITY RETURN ON IN PROGRESS JURISDICTION RATES REQUESTED (MILLIONS) FILING DATE RATIO EQUITY Oklahoma - PBRC $41.5 M Feb-2025 58.50% 9.4% Central-Gulf – GRIP $15.4 M Feb-2025 59.58% 9.7% West-North – GRIP $8.2 M Feb-2025 59.74% 9.6% APPROVED RATES EFFECTIVE EQUITY RETURN

  19. Slide 19: Oklahoma Natural Gas

    Oklahoma Natural Gas PBRC filed February 2025 Performance-based rate change (PBRC) interim filing for annual rate reviews between full rate cases allows recovery of capital investments and operating expenses 2025 PBRC – ESTIMATED EFFECTIVE DATE JUNE 2025 Incremental Revenue $41.5 million annual reve

  20. Slide 20: Kansas Gas Service

    Kansas Gas Service Approved October; rates effective November 2024 2024 RATE CASE FILING $35 million net increase; $70 million total increase ($35 million Incremental Revenue already recovered through GSRS) File GSRS Annually in Return on Equity N/A August, rate case filing as needed. Next rate Equi

  21. Slide 21: Texas Gas Service

    Texas Gas Service Central-Gulf GRIP filed in February 2025 Gas Reliability Infrastructure Program (GRIP) allows for recovery of capital investments made between rate cases CENTRAL-GULF 2025 GRIP FILING File GRIP Annually in Incremental Surcharge Revenue $15.4 million annual revenue increase requeste

  22. Slide 22: Texas Gas Service

    Texas Gas Service West-North GRIP filed in February 2025 Gas Reliability Infrastructure Program (GRIP) allows for recovery of capital investments made between rate cases WEST-NORTH 2025 GRIP FILING File GRIP Annually in Incremental Surcharge Revenue $8.2 million annual revenue increase requested Feb

  23. Slide 23: Texas Gas Service

    Texas Gas Service Approved November; rates effective December 2024 CENTRAL-GULF 2024 RATE CASE FILING Incremental Surcharge Revenue $19.3 million annual revenue approved File GRIP Annually in Capital Expenditures $0 million1 February, rate case Pre-Tax Rate of Return 9.09% filing as needed $1.84 per

  24. Slide 24: Texas Gas Service

    Texas Gas Service Approved August; rates effective September 2024 Gas Reliability Infrastructure Program (GRIP) allows for recovery of capital investments made between rate cases RIO GRANDE VALLEY 2024 GRIP FILING File GRIP Annually in Incremental Surcharge Revenue $3.6 million annual increase appro

  25. Slide 25: Customer Affordability

    Customer Affordability G ONE Gas

  26. Slide 26: 2.6-to-1 Average Advantage in ONE Gas Territories

    2.6-to-1 Average Advantage in ONE Gas Territories 3 Natural Gas Price Advantage Over Electricity KWH EQUIVALENT ELECTRICITY VS. NATURAL GAS 14.32¢ 13.62¢ 12.28¢ 2.3x advantage3 2.6x advantage3 2.8x advantage3 6.17¢ 4.70¢ 4.79¢ Texas Oklahoma Kansas ¹ Avg. retail price of electricity/kWh ² ONE Gas de

  27. Slide 27: Average Annual Residential Customer Bill

    Average Annual Residential Customer Bill AVERAGE MONTHLY Cash Flow Stability RESIDENTIAL CUSTOMER BILL • ~92% of customers are residential $81 • ~70% of revenue less the cost of gas is fixed $73* $71* charges $67* $60 $58 $55 $54 $43 $25 $50 $51 $50 $33 $25 $46 Gas Prices Remain Stable into 2025 $32

  28. Slide 28: Clean Energy Solutions

    — 4 —_, Solutions/ G ONE Gas | a | |

  29. Slide 29: Reducing Emissions

    Reducing Emissions Operating in an environmentally responsible manner Emissions Reduction Goal By 2035, we expect to achieve a 55% reduction in Scope 1 emissions due to leaks from mains and services, measured from a 2005 baseline and accounting for projected system growth. As of December 31, 2024, w

  30. Slide 30: Emissions Reduction Strategy

    Emissions Reduction Strategy Aligned with overall strategy Tightening our system • Pipeline replacement and protection replaces higher emitting pipe with lower-emitting pipe • Advanced leak detection reduces time leaks are active Reducing customer gas usage • Energy efficiency programs encourage cus

  31. Slide 31: ESG Ratings & Company Recognition

    ESG Ratings & Company Recognition Robust Disclosures RATING ORGANIZATION 2024 2023 2022 • Full alignment with SASB • Following TCFD recommendations MSCI AAA AA AA • Disclosure of Scope 1 and 2 emissions Sustainalytics 25.8 28.6 30.9 Additional governance documents and reports ISS Corporate Rating C+

  32. Slide 32: Appendix

    Appendix G ONE Gas

  33. Slide 33: Sustainable Business Model

    Sustainable Business Model Focused Business Capital Regulatory Cash Flow Strategy Investments Construct Stability ▪ 100% regulated natural ▪ 20+ year vintage ▪ 3 states, multiple ▪ ~ 70% of fixed charges gas distribution utility pipeline replacement jurisdictions for recovery of revenue ▪ Conservati

  34. Slide 34: Sustainable Business Model

    Sustainable Business Model Customer Safe & Reliable Delivering Affordability Energy Foundational Energy ▪ Customer growth helps ▪ Industry-leading ▪ Committed moderate per-customer performance in to sustainability costs employee safety ▪ Energy efficiency and ▪ Leveraging technology ▪ Demonstrated s

  35. Slide 35: Corporate Structure and State Figures

    Corporate Structure and State Figures INCORPORATED ENTITY 100% regulated natural gas distribution No levered holding company; all debt issued by ONE Gas, Inc. 1 Division capital structures match Corporate capital structure KEY FIGURES 2: Average Number of Customers 651,000 924,000 706,000 Distributi

  36. Slide 36: Authorized Rate Base

    Authorized Rate Base As of December 31st, 2024 KANSAS OKLAHOMA TEXAS $2,273 $2,067 $1,854 (MILLIONS) $1,616 $1,726 $1,528 $1,720 $1,330 $1,412 $1,133 $1,197 $1,261 $1,239 $1,336 $1,047 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 2020 2021 2022 2023 2024 APPENDIX | 36

  37. Slide 37: Rate Base Definition

    Rate Base Definition Authorized Rate Base $5.4 billion (as of Dec. 31, 2024) • Includes capital investments authorized in most recent rate cases and interim filings • Excludes any capital investments since last approved rate cases or filings 2025 Estimated Average Rate Base $5.8 billion • Average of

  38. Slide 38: Comprehensive Regulatory Mechanisms

    Comprehensive Regulatory Mechanisms KEY MECHANISMS: KANSAS OKLAHOMA TEXAS Central-Gulf as needed West-North Dec. 2028 General Rate Case Filing Deadline 2030 June 2027 Rio Grande Feb. 2030 Valley Interim capital recovery GSRS PBRC GRIP Weather normalization ✓ ✓ ✓ Purchased gas riders (including gas c

  39. Slide 39: Regulatory Construct

    Regulatory Construct Governance KANSAS OKLAHOMA TEXAS “Home Rule” with three jurisdictions; Texas Kansas Corporation Commission Oklahoma Corporation Commission Railroad Commission has appellate authority Appointed by the governor to four-year staggered Railroad Commission elected to six-year Elected

  40. Slide 40: Non-GAAP Reconciliation

    Non-GAAP Reconciliation Cash Flow From Operations Before Changes in Working Capital (MILLIONS) 2025 GUIDANCE* Net income $ 257 Depreciation and amortization 298 Deferred taxes 50 Other 23 Cash flow from operations before changes in working capital $ 628 * Amounts shown are estimated midpoints as con

  41. Slide 41: Investor Information

    Investor Information Contact Information and 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 cove

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