Business Overview: Centuri Holdings, Inc. (NYSE: CTRI)

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Executive Summary

Centuri Holdings is a leading North American utility and energy infrastructure services company that builds, maintains, and modernizes the electric and gas distribution networks operated by regulated utilities across the United States and Canada. Spun off and taken public by Southwest Gas Holdings via an April 2024 IPO (with the separation fully completed in 2025), Centuri now operates as an independent, pure-play utility infrastructure contractor with roughly 9,687 full-time-equivalent employees across 97 locations in 46 U.S. states and 6 Canadian provinces, organized into four reportable segments spanning U.S. gas, Canadian utility, union electric, and non-union electric services.

The business model is straightforward but capital- and labor-intensive: Centuri wins long-term Master Service Agreements (MSAs) with large regulated utilities — American Electric Power, Enbridge, Entergy, Exelon, National Grid, and Southern Company among them — and is paid primarily on a unit-price or time-and-materials basis (79% of 2025 revenue) rather than fixed-price, which limits execution risk but also caps upside on well-run projects. Fiscal 2025 was a record year, with revenue reaching $2.98 billion (up 13%), a swing to $22.4 million of net income from a $6.7 million loss in 2024, and meaningful balance-sheet deleveraging (net debt/adjusted EBITDA improved to 2.5x from 3.6x).

The single most decision-relevant fact for investors is the combination of a rapidly strengthening operating and financial profile — record $5.9 billion backlog (up 59% year-over-year), a $13 billion opportunity pipeline, and 2026 guidance calling for adjusted EBITDA of $280–310 million — against a still-thin 8.0% base gross margin, a highly fragmented and low-barrier-to-entry competitive market, and an activist shareholder (the Icahn Group, holding roughly 10% of shares and a board seat as of February 2026) now pushing for change at a company only two years removed from being a captive subsidiary of a regulated utility holding company.

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1. Core Business Model & How They Work

Centuri generates revenue by contracting with regulated gas and electric utilities to perform the on-the-ground construction, maintenance, and replacement work needed to keep distribution networks safe and compliant — trenching and pipe replacement for gas systems, and line construction, storm restoration, and grid-hardening work for electric utilities. Approximately 78% of revenue flows through long-term Master Service Agreements that govern pricing and scope over multi-year horizons, but critically these MSAs can typically be cancelled by the customer "for convenience" on as little as 30 days' notice, meaning the long-term label does not eliminate near-term revenue risk. Most work (79% of 2025 revenue) is priced on a unit-price or time-and-materials basis — Centuri gets paid per unit of work completed or per labor/material hour, with the customer typically supplying materials — which shifts commodity and scope risk toward the utility customer and leaves Centuri's profitability more a function of labor productivity and crew utilization than commodity price movements.

Key Operational Drivers

1. MSA-Based, Variable-Priced Revenue Model — 78% of revenue under MSAs, 79% variable-priced (56% unit-price, 23% time-and-materials), versus only 21% fixed-price — deliberately structured to be "among the lowest fixed-price exposure in the industry."
2. Deep, Concentrated Utility Relationships — top 10 customers represent 48% of revenue and top 20 represent 65%, spanning marquee investment-grade utilities (AEP, Enbridge, Entergy, Exelon, National Grid, Southern Company) that provide recurring, regulatorily-mandated infrastructure spend.
3. Four-Segment Structure Balancing Gas and Electric, Union and Non-Union — U.S. Gas Utility Services, Canadian Utility Services, Union Electric Utility Services, and Non-Union Electric Utility Services diversify exposure across fuel type, geography, and labor structure.
4. Labor-Intensive Scale — 9,687 FTEs (57% unionized) across 97 locations is the primary operating asset; growth is gated by the ability to recruit and train skilled tradespeople (linemen, welders, project managers) in a tight labor market.
5. Record Backlog as a Forward Indicator — a $5.9 billion backlog (+59% year-over-year) on $4.5 billion of annual bookings (1.5x book-to-bill) and a $13 billion opportunity pipeline underpin management's 2026 guidance for continued double-digit growth.

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2. Business Segments

Centuri reports four segments:

• U.S. Gas Utility Services — construction, maintenance, and replacement of natural gas distribution infrastructure for U.S. regulated gas utilities.
• Canadian Utility Services (formerly Canadian Gas) — gas (and increasingly broader utility) infrastructure services across 6 Canadian provinces.
• Union Electric Utility Services — electric distribution and transmission construction/maintenance performed by unionized crews.
• Non-Union Electric Utility Services — comparable electric infrastructure work performed by a non-union workforce, typically in different regional/regulatory labor markets.

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3. Product Portfolio

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4. Competitive Landscape

Centuri operates in what its own 10-K describes as a "highly competitive and highly fragmented" industry, one with "relatively few barriers" to entry in many service lines. Competition comes from large, well-capitalized national infrastructure contractors as well as smaller regional players that can undercut on price due to lower overhead structures, and — critically — from utilities' own in-house service organizations, which represent a persistent insourcing threat on the margin. This combination of low entry barriers and an ever-present insourcing alternative means Centuri's competitive position rests on scale, safety record, and specialized workforce availability rather than any structural barrier that prevents new entrants or customer self-performance.

Key Competitors:

• Quanta Services (the dominant, much larger diversified infrastructure services company)
• MYR Group (electric transmission and distribution specialist)
• MasTec (diversified infrastructure and communications construction)
• Primoris Services (diversified energy and utility infrastructure contractor)
• Everus Construction (electrical and mechanical construction services)
• Utilities' own internal service/construction organizations (an ever-present insourcing alternative)

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5. Strategic Strengths & Risks

Competitive Strengths (The Moat)

• Long-standing, deeply embedded MSA relationships with marquee investment-grade utilities (AEP, Enbridge, Entergy, Exelon, National Grid, Southern Company), built over decades and reinforced by safety certifications and specialized crew training that are costly for a utility to requalify from scratch.
• Record $5.9 billion backlog and $13 billion opportunity pipeline reflect structural, regulatorily-mandated tailwinds — aging gas/electric infrastructure replacement, grid modernization, and electrification — that support multi-year visibility regardless of any single competitive dynamic.
• Diversified four-segment structure spanning gas/electric and union/non-union labor pools reduces dependence on any single fuel type, geography, or labor-relations model.
• Meaningful 2025 deleveraging (net debt/adjusted EBITDA improved from 3.6x to 2.5x) alongside record profitability gives the company more financial flexibility than it had as a newly separated entity in 2024.

Strategic Risks & Vulnerabilities

1. Thin, structurally low margins — base gross profit margin of only 8.0% in 2025 (up from 6.9%) leaves little room for cost overruns, wage inflation, or pricing pressure to erode profitability, and reflects the commoditized, price-competitive nature of the work.
2. Contract cancellation risk despite "long-term" framing — MSAs, while described as long-term, are typically cancellable for convenience on ~30 days' notice, meaning the large backlog figure is not fully contractually locked in.
3. Customer concentration — the top 10 customers represent 48% of revenue; loss or material reduction of spend from even one or two of these utilities would meaningfully affect results.
4. Labor availability constraints — growth is gated by the ability to recruit and retain skilled tradespeople (linemen, welders, project managers) in a persistently tight North American skilled-labor market; 57% of the workforce is unionized, adding labor-relations complexity.
5. Activist shareholder pressure — the Icahn Group's ~10% stake and February 2026 board appointment introduces governance and strategic-direction uncertainty for a company still establishing its standalone operating identity post-spinoff.
6. Weather and seasonality — Q1 revenues are structurally the weakest due to winter weather, and extreme weather events (which can both help via storm-restoration work and hurt via project delays) create year-to-year unpredictability.

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6. Financial Overview

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7. Summary Conclusion

Centuri has emerged from its 2024 spin-off from Southwest Gas Holdings as a genuine independent growth story: record 2025 revenue of $2.98 billion, a return to net profitability, meaningful deleveraging, and a backlog that has swelled to $5.9 billion on the back of structural, regulatorily-driven demand for gas and electric infrastructure replacement and grid modernization across North America. That said, the company operates in a fundamentally low-margin, fragmented, and low-barrier-to-entry industry — base gross margins remain in the high single digits, customers can and do cancel MSAs on short notice, and utilities retain the option to insource work — meaning Centuri's moat is built on relationship depth, safety/certification track record, and labor-force scale rather than any structural insulation from competition. With an activist investor now on the board and 2026 guidance calling for continued double-digit growth, the key question for investors is whether Centuri can convert its record backlog into durable margin expansion, or whether intensifying competition and persistent skilled-labor constraints cap the upside of what remains, at its core, a low-margin infrastructure-services business.