[SWX] Southwest Gas Holdings Thesis 2026: Arizona Nevada Gas Utility Drives Centuri Separation Rate Base Growth

Key Takeaways

• SWX FY2025 revenue ~$5.50-6.00B (-2 to +5% YoY) with adj. EPS ~$3.60-4.20 reflecting continued ~$2.30-2.60B aggregate Natural Gas Distribution (Southwest Gas Corporation) + ~$3.00-3.40B aggregate Centuri infrastructure services + selected various aggregate Corporate revenue mix under continued President + CEO Karen Haller since 2022 (~3-4 year tenure as Southwest Gas Holdings CEO; selected post-2022 succession from John Hester retirement + selected post-2022 succession from Southwest Gas EVP/General Counsel background + selected primary architect of post-2022-2025 strategic reset toward natural gas utility pure-play + Centuri separation/IPO + selected various aggregate Carl Icahn activist influence (~9-10% aggregate Icahn ownership stake + board representation)).
• Arizona/Nevada/California Natural Gas Distribution Utility Pipeline (~$2.30-2.60B Revenue): ~$2.30-2.60B aggregate Natural Gas Distribution (Southwest Gas Corporation) revenue (~40-45% revenue mix; selected primary ~highest-margin segment ~$0.30-0.40B aggregate utility net income); selected primary ~2.2M+ aggregate natural gas distribution customers (selected primary Arizona ~1.3M+ + Nevada ~0.8M+ + California ~0.2M+ + selected various aggregate Phoenix + Tucson + Las Vegas + Reno + selected various aggregate growth markets) + selected various aggregate ~$8-10B aggregate rate base + selected various aggregate ~6-9% aggregate annual rate base growth (selected primary ~$1.0-1.5B aggregate annual utility capex — system reliability + customer growth + safety + selected various aggregate ~$0+ aggregate cumulative FY2025-FY2029 capital investment plan) + selected various aggregate ~9.0-10.0% aggregate authorized rate of return + selected various aggregate ~1-2% aggregate annual customer growth (selected primary Arizona + Nevada population + economic growth tailwind) + selected various aggregate rate case + decoupling + tracker mechanism cadence (Arizona + Nevada + California PUC).
• Centuri Separation + Infrastructure Services Pipeline (~$3.00-3.40B Revenue + Strategic Catalyst): ~$3.00-3.40B aggregate Centuri infrastructure services revenue (~55-60% revenue mix; selected primary utility infrastructure construction — gas + electric utility distribution + transmission pipeline + selected various aggregate ~$0.10-0.20B aggregate Centuri operating income + selected various aggregate ~5-8% aggregate Centuri operating margin); selected primary post-2024 Centuri Holdings IPO (selected various aggregate ~partial IPO completed April 2024 — Southwest Gas retains ~80%+ aggregate Centuri ownership stake + selected various aggregate ~ongoing Centuri separation/spin-off considerations toward full separation) + selected various aggregate Centuri (utility infrastructure construction — selected primary Riggs Distler + Linetec Services + National Powerline + selected various aggregate ~gas + electric utility distribution + transmission + selected various aggregate ~$4-5B+ aggregate Centuri backlog + selected various aggregate ~Inflation Reduction Act + Infrastructure Investment & Jobs Act + grid modernization + electrification demand tailwind) + selected various aggregate post-2024-2025 Centuri full separation timeline considerations (selected primary Carl Icahn activist pressure for full separation + selected various aggregate ~Southwest Gas pure-play natural gas utility target).
• Capital position + balance sheet: ~$2.48 aggregate annual dividend (~60-70% aggregate payout ratio; ~3.0-4.0% aggregate dividend yield; selected ~18+ year aggregate consecutive dividend increase track record); no aggregate FY2025 buybacks (selected primary capital reinvestment + Centuri separation priority); aggregate capital return ~$180-185M FY2025 (~100% via dividend); net leverage ~5.0-6.0x Net Debt/EBITDA (selected primary utility + Centuri elevated leverage + post-2024-2025 deleveraging via Centuri separation proceeds); investment-grade BBB-/Baa3 to BBB/Baa2 credit rating; ~71-73M aggregate diluted shares.
• FY2026 thesis catalysts: Arizona/Nevada/California Natural Gas Distribution Utility pipeline (~$2.30-2.60B + ~2.2M+ customers + ~$8-10B rate base + ~6-9% annual rate base growth + ~$1.0-1.5B annual utility capex + 9.0-10.0% authorized rate of return + Arizona + Nevada population + economic growth tailwind) + Centuri Separation + Infrastructure Services pipeline ($3.00-3.40B + post-2024 Centuri IPO + ~ongoing full separation toward Southwest Gas pure-play + ~$4-5B+ Centuri backlog + IRA + IIJA + grid modernization + electrification demand tailwind + Carl Icahn activist pressure for full separation) + ~$180-185M aggregate FY2025 capital return + ~18+ year consecutive dividend increase track + Karen Haller natural gas utility pure-play + Centuri separation execution.

Company Background

Southwest Gas Holdings, Inc. (NYSE: SWX) is a US Arizona/Nevada/California natural gas distribution utility holding company + Centuri infrastructure services parent, founded 1931 as Southwest Gas Corporation in Las Vegas Nevada (~94-year heritage; selected primary post-1931 founding focus on natural gas distribution in Arizona + Nevada + California + selected post-1956 NYSE listing + selected post-2017 Centuri (formerly NPL Construction) utility infrastructure services expansion via acquisitions + selected post-2021 Holdings structure). Selected post-2017 NYSE listing (Southwest Gas Holdings); selected post-2017-2025 selected various aggregate ~$5B+ aggregate cumulative Centuri infrastructure services acquisitions (selected various aggregate Linetec Services 2018 + Riggs Distler 2021 + National Powerline + selected various aggregate); selected post-2022 Karen Haller CEO appointment (selected post-2022 succession from John Hester retirement; selected post-2022 ex-Southwest Gas EVP/General Counsel); selected post-2024 Centuri Holdings IPO (selected various aggregate ~partial IPO completed April 2024 — Southwest Gas retains ~80%+ aggregate Centuri ownership stake) + selected various aggregate ~ongoing Centuri full separation considerations; selected post-2022-2025 Carl Icahn activist influence (~9-10% aggregate Icahn ownership stake + board representation + pressure for Centuri full separation + natural gas utility pure-play); HQ Las Vegas Nevada; ~12,000-13,000 employees (including Centuri).

SWX operates 2 primary segments: Natural Gas Distribution (Southwest Gas Corporation) (~40-45% revenue mix; ~$2.30-2.60B; Arizona + Nevada + California natural gas distribution utility) + Centuri Holdings infrastructure services (~55-60% revenue mix; ~$3.00-3.40B; utility infrastructure construction — gas + electric utility distribution + transmission pipeline). Natural Gas Distribution: ~2.2M+ aggregate natural gas distribution customers (Arizona ~1.3M+ + Nevada ~0.8M+ + California ~0.2M+); ~$8-10B aggregate rate base. Centuri: utility infrastructure construction (Riggs Distler + Linetec Services + National Powerline; ~$4-5B+ aggregate backlog). Geographic mix: Arizona ~30-35% + Nevada ~20-25% + California ~5-10% + Centuri US + Canada ~35-40%.

Capital position: ~$2.48 aggregate annual dividend (~60-70% aggregate payout ratio; ~3.0-4.0% aggregate dividend yield; selected ~18+ year aggregate consecutive dividend increase track record); no aggregate FY2025 buybacks; aggregate capital return ~$180-185M FY2025; net leverage ~5.0-6.0x Net Debt/EBITDA; investment-grade BBB-/Baa3 to BBB/Baa2 credit rating; ~71-73M aggregate diluted shares.

Arizona/Nevada/California Natural Gas Distribution Utility Pipeline (~$2.30-2.60B Revenue)

The Arizona/Nevada/California Natural Gas Distribution Utility pipeline is SWX's foundation thesis: ~$2.30-2.60B aggregate Natural Gas Distribution (Southwest Gas Corporation) revenue (~40-45% revenue mix; selected primary ~highest-margin segment ~$0.30-0.40B aggregate utility net income); selected primary ~2.2M+ aggregate natural gas distribution customers (selected primary Arizona ~1.3M+ + Nevada ~0.8M+ + California ~0.2M+ + selected various aggregate Phoenix + Tucson + Las Vegas + Reno + selected various aggregate growth markets) + selected various aggregate ~$8-10B aggregate rate base + selected various aggregate ~6-9% aggregate annual rate base growth (selected primary ~$1.0-1.5B aggregate annual utility capex — system reliability + customer growth + safety + selected various aggregate ~$0+ aggregate cumulative FY2025-FY2029 capital investment plan) + selected various aggregate ~9.0-10.0% aggregate authorized rate of return + selected various aggregate ~1-2% aggregate annual customer growth (selected primary Arizona + Nevada population + economic growth tailwind) + selected various aggregate rate case + decoupling + tracker mechanism cadence (Arizona + Nevada + California PUC).

FY2025 Arizona/Nevada/California Natural Gas Distribution Utility dynamics ($2.30-2.60B aggregate revenue): selected continued post-2024 ~+3-7% aggregate Natural Gas Distribution rate base growth (selected primary ~$1.0-1.5B aggregate FY2025 utility capex + selected various aggregate Arizona + Nevada + California PUC-allowed rate base recovery + selected various aggregate ~9.0-10.0% aggregate authorized rate of return + selected various aggregate ~1-2% aggregate annual customer growth + selected various aggregate Arizona + Nevada population + economic growth tailwind + selected various aggregate rate case + decoupling + tracker mechanism cadence) + selected primary ~$8-10B aggregate rate base + selected various aggregate ~2.2M+ aggregate natural gas distribution customers + selected various aggregate ~$0.30-0.40B aggregate utility net income. Selected post-2024 ~$3.00-3.50 incremental annual EPS contribution as Arizona/Nevada/California Natural Gas Distribution Utility pipeline drives incremental regulated rate base earnings.

FY2026 catalyst: continued Arizona/Nevada/California Natural Gas Distribution Utility pipeline + ~$3.00-3.50 incremental annual EPS contribution under continued Karen Haller leadership (~3-4 year tenure). Selected aggregate ~$2.40-2.70B aggregate FY2026 Natural Gas Distribution revenue + selected various ~+6-9% aggregate rate base growth + selected various aggregate ~$8.5-11B aggregate rate base + selected various aggregate ~$1.0-1.5B aggregate FY2026 utility capex + selected various aggregate ~9.0-10.0% aggregate authorized rate of return + selected various aggregate ~1-2% aggregate annual customer growth + selected various aggregate Arizona + Nevada population + economic growth tailwind + selected various aggregate rate case + decoupling + tracker mechanism cadence + selected various aggregate ~$0.32-0.42B aggregate FY2026 utility net income. Risks: NW Natural Holding (NWN, ~$1.5-2.0B Mcap; Pacific Northwest natural gas utility) + ONE Gas (OGS, ~$4-5B; Oklahoma + Kansas + Texas natural gas utility) + Spire (SR, ~$3-4B; Midwest natural gas utility) + New Jersey Resources (NJR, ~$3-4B; natural gas utility) + Atmos Energy (ATO, ~$22-25B; natural gas utility) + Essential Utilities (WTRG, ~$10-12B; water + natural gas utility) + selected various aggregate US natural gas utility competitive considerations + Arizona + Nevada + California PUC regulatory considerations (selected primary rate case outcomes + authorized rate of return + decoupling + tracker mechanisms) + customer growth cycle considerations (Arizona + Nevada population + economic growth) + electrification considerations (selected primary California + selected various aggregate state building electrification policies vs natural gas) + selected various aggregate utility capex execution considerations + selected various aggregate natural gas commodity cost pass-through considerations.

Centuri Separation + Infrastructure Services Pipeline (~$3.00-3.40B Revenue + Strategic Catalyst)

The Centuri Separation + Infrastructure Services pipeline is SWX's primary strategic catalyst thesis: ~$3.00-3.40B aggregate Centuri infrastructure services revenue (~55-60% revenue mix; selected primary utility infrastructure construction — gas + electric utility distribution + transmission pipeline + selected various aggregate ~$0.10-0.20B aggregate Centuri operating income + selected various aggregate ~5-8% aggregate Centuri operating margin); selected primary post-2024 Centuri Holdings IPO (selected various aggregate ~partial IPO completed April 2024 — Southwest Gas retains ~80%+ aggregate Centuri ownership stake + selected various aggregate ~ongoing Centuri separation/spin-off considerations toward full separation) + selected various aggregate Centuri (utility infrastructure construction — selected primary Riggs Distler + Linetec Services + National Powerline + selected various aggregate ~gas + electric utility distribution + transmission + selected various aggregate ~$4-5B+ aggregate Centuri backlog + selected various aggregate ~Inflation Reduction Act + Infrastructure Investment & Jobs Act + grid modernization + electrification demand tailwind) + selected various aggregate post-2024-2025 Centuri full separation timeline considerations (selected primary Carl Icahn activist pressure for full separation + selected various aggregate ~Southwest Gas pure-play natural gas utility target).

FY2025 Centuri Separation + Infrastructure Services dynamics: selected primary ~$3.00-3.40B aggregate Centuri infrastructure services revenue + selected various aggregate ~$0.10-0.20B aggregate Centuri operating income + selected various aggregate ~5-8% aggregate Centuri operating margin + selected various aggregate post-2024 Centuri Holdings IPO (partial IPO completed April 2024 — Southwest Gas retains ~80%+ aggregate Centuri ownership stake + selected various aggregate ~ongoing Centuri separation/spin-off considerations) + selected various aggregate Centuri (Riggs Distler + Linetec Services + National Powerline + selected various aggregate ~gas + electric utility distribution + transmission + selected various aggregate ~$4-5B+ aggregate Centuri backlog + selected various aggregate ~IRA + IIJA + grid modernization + electrification demand tailwind) + selected various aggregate post-2024-2025 Centuri full separation timeline considerations (selected primary Carl Icahn activist pressure + selected various aggregate ~Southwest Gas pure-play natural gas utility target). Selected post-2024 ~$0.60-1.00 incremental annual EPS contribution as Centuri Separation + Infrastructure Services pipeline drives incremental Centuri ownership stake earnings + separation value unlock.

FY2026 catalyst: continued Centuri Separation + Infrastructure Services pipeline + ~$0.60-1.00 incremental EPS contribution. Selected aggregate ~$3.10-3.55B aggregate FY2026 Centuri infrastructure services revenue + selected various aggregate ~$0.12-0.25B aggregate Centuri operating income + selected various aggregate ~5-9% aggregate Centuri operating margin + selected various aggregate post-2024 Centuri Holdings IPO + ~ongoing Centuri full separation (selected primary potential ~FY2026-FY2027 Centuri spin-off / further stake sell-down toward Southwest Gas pure-play natural gas utility) + selected various aggregate ~$4-5B+ aggregate Centuri backlog + selected various aggregate ~IRA + IIJA + grid modernization + electrification demand tailwind + selected various aggregate Carl Icahn activist pressure for full separation + selected various aggregate Centuri separation proceeds for Southwest Gas deleveraging. Risks: Quanta Services (PWR, ~$30-40B Mcap; electric transmission + utility infrastructure construction) + MasTec (MTZ, ~$10-13B; electric transmission + communications) + MYR Group (MYRG, ~$3-4B; electric transmission) + Primoris Services (PRIM, ~$3-5B; energy + utilities) + Everus Construction Group (ECG, ~$5-10B; electric transmission + mechanical construction) + IES Holdings (IESC, ~$2-3B; electrical contractors) + selected various aggregate utility infrastructure construction competitive considerations + IRA + IIJA + grid modernization + electrification policy considerations + utility customer capex cycle considerations (selected primary gas + electric utility distribution + transmission capex) + Centuri backlog conversion considerations + Centuri full separation timeline considerations + Carl Icahn activist pressure considerations + selected various aggregate Centuri separation valuation considerations + selected various aggregate Southwest Gas post-separation pure-play valuation considerations.

Capital Position + Balance Sheet

Capital position + balance sheet: ~$2.48 aggregate annual dividend (~60-70% aggregate payout ratio; ~3.0-4.0% aggregate dividend yield; selected ~18+ year aggregate consecutive dividend increase track record) + no aggregate FY2025 buybacks (selected primary capital reinvestment + Centuri separation priority) + aggregate capital return ~$180-185M FY2025 (~100% via dividend) + net leverage ~5.0-6.0x Net Debt/EBITDA (selected primary utility + Centuri elevated leverage + post-2024-2025 deleveraging via Centuri separation proceeds) + investment-grade BBB-/Baa3 to BBB/Baa2 credit rating + ~71-73M aggregate diluted shares + weighted average debt maturity ~7-9 years.

FY2026 catalyst: continued ~$185-195M aggregate annual capital return + selected continued ~3.0-4.0% aggregate dividend yield + selected continued ~$2.48-2.55 aggregate annual dividend (post-FY2025 ~19+ year continuous consecutive dividend increase track record) + selected continued ~4.5-5.5x net leverage (post-FY2025 deleveraging via Centuri separation proceeds + utility rate base growth) + selected various aggregate ~$1.0-1.5B aggregate FY2026 utility capex (selected primary system reliability + customer growth + safety) + selected continued investment-grade BBB-/Baa3 to BBB/Baa2 credit rating. Selected ~60-70% aggregate payout ratio + selected ~$1.0-1.5B aggregate annual utility capex + selected Centuri separation proceeds support continued dividend + Arizona/Nevada/California Natural Gas Distribution Utility rate base growth + Centuri full separation toward Southwest Gas pure-play natural gas utility.

Key Core Metrics

• FY2025 revenue ~$5.50-6.00B (-2 to +5% YoY) vs $5.65B FY2024; adj. EPS ~$3.60-4.20
• 2 segments: Natural Gas Distribution (Southwest Gas Corporation) ~40-45% ($2.30-2.60B; ~highest-margin ~$0.30-0.40B utility net income) + Centuri Holdings infrastructure services ~55-60% ($3.00-3.40B; ~5-8% operating margin)
• Geographic mix: Arizona ~30-35% + Nevada ~20-25% + California ~5-10% + Centuri US + Canada ~35-40%
• Natural Gas Distribution: ~2.2M+ aggregate natural gas distribution customers (Arizona ~1.3M+ + Nevada ~0.8M+ + California ~0.2M+)
• Rate base: ~$8-10B aggregate
• Annual rate base growth: ~6-9% aggregate
• Annual utility capex: ~$1.0-1.5B aggregate (system reliability + customer growth + safety)
• Authorized rate of return: ~9.0-10.0% aggregate
• Annual customer growth: ~1-2% aggregate (Arizona + Nevada population + economic growth tailwind)
• Centuri: utility infrastructure construction (Riggs Distler + Linetec Services + National Powerline; gas + electric utility distribution + transmission pipeline)
• Centuri backlog: ~$4-5B+ aggregate
• post-2024 Centuri Holdings IPO: partial IPO completed April 2024 — Southwest Gas retains ~80%+ aggregate Centuri ownership stake; ~ongoing full separation considerations
• Carl Icahn activist influence: ~9-10% aggregate Icahn ownership stake + board representation + pressure for Centuri full separation + natural gas utility pure-play
• IRA + IIJA + grid modernization + electrification demand tailwind (Centuri)
• Aggregate adj. EBITDA: ~$0.7-0.9B FY2025
• Net leverage ~5.0-6.0x Net Debt/EBITDA (utility + Centuri elevated leverage; post-2024-2025 deleveraging via Centuri separation proceeds)
• ~71-73M aggregate diluted shares; ~$180-185M total capital return FY2025
• Dividend ~$2.48 annual (~60-70% payout; ~3.0-4.0% yield; ~18+ year consecutive dividend increase track record)
• No aggregate FY2025 buybacks (capital reinvestment + Centuri separation priority)
• Investment-grade BBB-/Baa3 to BBB/Baa2 credit rating
• ~12,000-13,000 employees (including Centuri)
• Karen Haller CEO since 2022 (~3-4 year tenure; ex-Southwest Gas EVP/General Counsel)
• HQ Las Vegas Nevada; founded 1931

Market Evaluation

SWX FY2026 market evaluation: at ~$65-85 share price + ~71-73M aggregate diluted shares = ~$4.5-6.5B market cap; ~$2.48 aggregate annual dividend + ~3.0-4.0% aggregate dividend yield. Selected primary SWX peers: NW Natural Holding (NWN, ~$1.5-2.0B Mcap; Pacific Northwest natural gas utility) + ONE Gas (OGS, ~$4-5B; Oklahoma + Kansas + Texas natural gas utility) + Spire (SR, ~$3-4B; Midwest natural gas utility) + New Jersey Resources (NJR, ~$3-4B; natural gas utility) + Atmos Energy (ATO, ~$22-25B; natural gas utility) + Essential Utilities (WTRG, ~$10-12B; water + natural gas utility) + UGI Corporation (UGI, ~$6-9B; diversified energy + natural gas utility) + Northwest Natural Gas + Pinnacle West Capital (PNW, ~$8-10B; Arizona electric utility — comparable Arizona footprint) + Quanta Services (PWR, ~$30-40B; electric transmission + utility infrastructure — Centuri peer) + MasTec (MTZ, ~$10-13B; electric transmission — Centuri peer) + selected various aggregate US natural gas utility + utility infrastructure construction companies. Selected SWX ~14-20x P/E (Arizona/Nevada/California natural gas distribution utility + Centuri infrastructure services with ~2.2M+ customers + ~$8-10B rate base + ~6-9% annual rate base growth + post-2024 Centuri IPO + ~ongoing full separation toward Southwest Gas pure-play + ~18+ year consecutive dividend increase track + Carl Icahn activist value unlock) + selected ~8-12x EV/EBITDA + selected ~3.0-4.0% dividend yield + selected aggregate ~$5.60-6.10B aggregate FY2026 revenue + selected aggregate ~$3.90-4.50 aggregate FY2026 EPS + selected aggregate ~$185-195M aggregate FY2026 capital return + selected aggregate Arizona/Nevada/California Natural Gas Distribution Utility + Centuri Separation + Infrastructure Services pipeline. FY2026 base case: ~$5.60-6.10B aggregate revenue + ~$3.90-4.50 adj. EPS + $185-195M aggregate capital return. Bull case: Arizona/Nevada/California Natural Gas Distribution Utility pipeline acceleration ($8.5-11B rate base + ~6-9% annual rate base growth + ~$1.0-1.5B annual utility capex + favorable Arizona + Nevada + California PUC rate case outcomes + ~1-2% annual customer growth + Arizona + Nevada population + economic growth tailwind) + Centuri Separation + Infrastructure Services pipeline acceleration (post-2024 Centuri IPO value crystallization + ~FY2026-FY2027 Centuri full spin-off / further stake sell-down toward Southwest Gas pure-play natural gas utility re-rating + ~$4-5B+ Centuri backlog + IRA + IIJA + grid modernization + electrification demand tailwind + Centuri separation proceeds deleveraging) + Carl Icahn activist value unlock drives ~$5.85-6.40B aggregate revenue + ~$4.30-5.00 EPS + Southwest Gas pure-play re-rating. Bear case: NW Natural + ONE Gas + Spire + New Jersey Resources + Atmos Energy + Essential Utilities + Pinnacle West competitive intensification + Quanta Services + MasTec + MYR Group + Primoris + Everus + IES Centuri competitive intensification + Arizona + Nevada + California PUC unfavorable rate case outcomes + customer growth cycle considerations (Arizona + Nevada population + economic growth) + electrification considerations (California + state building electrification policies vs natural gas) + utility capex execution considerations + Centuri backlog conversion considerations + Centuri full separation timeline considerations + Carl Icahn activist pressure considerations + Federal Reserve interest rate cycle considerations (utility cost of capital + Centuri leverage) + post-2022 Karen Haller CEO succession planning considerations drives ~$5.30-5.60B revenue + ~$3.20-3.80 EPS. The thesis depends on Arizona/Nevada/California Natural Gas Distribution Utility + Centuri Separation + Infrastructure Services + ~2.2M+ customers + ~$8-10B rate base + ~6-9% annual rate base growth + post-2024 Centuri IPO + ~ongoing full separation toward Southwest Gas pure-play + Carl Icahn activist value unlock + ~18+ year consecutive dividend increase track + Karen Haller natural gas utility pure-play + Centuri separation execution.