Business Overview: Custom Truck One Source, Inc. (NYSE: CTOS)

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Executive Summary

Custom Truck One Source is North America's largest specialty equipment platform serving infrastructure-related end markets, operating a "one-stop-shop" model that combines rental, new and used equipment sales, and aftermarket parts and service from more than 40 locations across the United States and Canada. The company's fleet — more than 10,400 rental units with an average age of just 2.9 years — spans bucket trucks, digger derricks, cranes, dump trucks, cable placers, boom trucks, rail trucks, vacuum trucks, and other vocational vehicles used primarily in electric utility transmission and distribution (T&D), telecommunications, rail, general infrastructure/waste management, and forestry. Roughly 8,000 customers use the platform, with the top 15 accounts representing only 23.6% of revenue and no single customer exceeding 4% — a diversified base that reduces single-account risk.

Custom Truck's business model is distinctive within the equipment-rental industry: rather than simply renting third-party manufactured equipment like a traditional rental company, CTOS designs, manufactures, and customizes specialty truck bodies and equipment in-house, giving it short lead times, the ability to reposition and repurpose fleet assets across rental, new-sale, and used-sale channels, and a structural cost advantage on vocational chassis through large-scale purchasing. This integrated production-plus-distribution model, together with a majority ownership stake held by private equity firm Platinum Equity, has driven record revenue growth (FY2025 revenue of $1.94 billion, up 7.9% year over year) even as reported net income has remained negative.

The single most decision-relevant fact for investors is that CTOS carries a heavily levered balance sheet — total indebtedness of $1.66 billion as of December 31, 2025 (before including $657.4 million of separate floor-plan financing) — against a relatively modest equity market capitalization of roughly $1.2 billion, and the company posted a full-year 2025 net loss of $31.1 million despite record revenue and 12.9% Adjusted EBITDA growth. The investment case therefore hinges on whether continued secular demand for grid modernization, electrification, and telecom infrastructure investment (which management describes as being in the "early stages of a secular upcycle") can sustain fleet utilization (83.6% at year-end 2025, its highest in nearly three years) and drive deleveraging over time, rather than on near-term GAAP profitability.

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1. Core Business Model & How They Work

Custom Truck One Source generates revenue across three interconnected channels — equipment rental, new/used equipment sales, and aftermarket parts and service — that together let the company monetize the same underlying fleet assets multiple ways over their lifecycle: build or acquire a unit, rent it out during periods of peak utilization, sell it (new or used) when a customer prefers ownership, and service it throughout for recurring high-margin revenue. Because CTOS both manufactures/customizes truck bodies and equipment and distributes them, it can flex fleet allocation between rental and sale based on demand, generating attractive resale values relative to pure-play equipment renters that lack manufacturing capability.

Key Operational Drivers

1. Integrated Manufacturing and Customization — in-house production of specialty truck bodies and equipment (with "more than 250 product variations") allows short lead times and tailored configurations versus competitors who must rely on third-party OEM order queues.
2. Young, Well-Utilized Rental Fleet — a 10,400+ unit fleet averaging 2.9 years old and running at over 77% average utilization over the past two years (83.6% at year-end 2025) supports both rental yield and strong resale values when units are sold.
3. National Footprint with Fleet Repositioning — more than 40 locations let CTOS move equipment to match regional demand spikes (e.g., storm restoration, grid buildouts), a scale advantage smaller regional players cannot replicate.
4. Structural Purchasing Cost Advantage — large-scale chassis purchasing gives CTOS a cost edge on the vocational truck chassis that underlie its specialty equipment, supporting margins across all three business lines.
5. Diversified, Granular Customer Base — roughly 8,000 customers across utility, telecom, rail, infrastructure, and forestry end markets, with the top 15 customers representing only 23.6% of revenue, reduces customer-concentration risk relative to more concentrated industrial suppliers.

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2. Business Segments

Through fiscal year 2025, Custom Truck One Source reported three operating segments:

• Equipment Rental Solutions (ERS) — manages what the company describes as the largest specialty rental fleet in North America.
• Truck and Equipment Sales (TES) — new and used specialty equipment sales.
• Aftermarket Parts and Services (APS) — parts, tools, accessories, and repair/maintenance services, supported by roughly 90 mobile technicians and over 2,600 third-party service partners.

Beginning in Q1 2026, the company is reorganizing into two new segments — Specialty Equipment Rentals (SER) and Specialty Truck Equipment and Manufacturing (STEM) — reflecting a tighter alignment between its rental fleet management and its manufacturing/production operations.

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3. Product Portfolio

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4. Competitive Landscape

Custom Truck One Source competes in the specialty equipment rental and sales market against both large, diversified general equipment rental companies and OEM/dealer networks focused on vocational trucks. General rental giants bring far greater overall scale and lower blended cost of capital, while OEM-affiliated dealers can offer manufacturer-direct relationships; CTOS's differentiation rests on being one of the few players that both manufactures/customizes specialty truck equipment and operates a large-scale rental and sales distribution network under one roof, an integration that is difficult and capital-intensive for a new entrant to replicate.

Key Competitors:

• United Rentals and Sunbelt Rentals (Ashtead Group) — the two largest North American general equipment rental companies, both far larger in overall scale
• Herc Holdings (Herc Rentals) — another large diversified national equipment rental competitor
• Altec Industries and other specialty truck-body OEMs/dealers — compete directly in truck customization and new-equipment sales
• Regional and independent specialty truck dealers and rental yards serving utility, telecom, and infrastructure customers in specific geographies

CTOS's niche focus on electrification/utility, telecom, and rail infrastructure equipment differentiates it from the broader construction-equipment focus of United Rentals and Sunbelt, but it still competes for the same capital-intensive fleet investment dollars and faces pricing/utilization pressure during industrial or construction downcycles.

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5. Strategic Strengths & Risks

Competitive Strengths (The Moat)

• Vertically integrated manufacturing-plus-distribution model gives CTOS control over lead times, customization, and fleet flexibility that pure rental or pure OEM competitors cannot match.
• Large, young, well-utilized fleet (2.9-year average age, 83.6% utilization at year-end 2025) supports strong resale economics and rental yields simultaneously.
• Highly diversified customer base (~8,000 customers, no customer over 4% of revenue) reduces concentration risk versus more customer-concentrated industrial suppliers.
• Direct exposure to durable secular growth themes — grid modernization/electrification, telecom infrastructure buildout, and rail maintenance — that are less tied to the general construction cycle than broader equipment-rental peers.

Strategic Risks & Vulnerabilities

1. High leverage — $1.66 billion of total indebtedness (excluding floor-plan financing) against a roughly $1.2 billion equity market capitalization leaves limited balance-sheet cushion if end-market demand or fleet utilization softens.
2. Persistent GAAP losses — a full-year 2025 net loss of $31.1 million despite record revenue and double-digit Adjusted EBITDA growth signals that depreciation, interest expense, and other costs are currently outpacing operating profitability.
3. Cyclical, capital-intensive end markets — demand for specialty rental and sales equipment is tied to utility capital-spending cycles, infrastructure funding levels, and broader economic conditions; a slowdown in grid or telecom capex could pressure both rental utilization and new/used equipment sales.
4. Majority private-equity ownership (Platinum Equity) — concentrated control gives the sponsor significant influence over capital allocation, strategic direction, and potential future ownership transactions, which may not always align with minority public shareholders.
5. Segment reorganization execution risk — the shift from three segments (ERS/TES/APS) to two (SER/STEM) beginning in Q1 2026 introduces near-term reporting and operational transition risk as management integrates rental-fleet management more closely with manufacturing operations.

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6. Financial Overview

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7. Summary Conclusion

Custom Truck One Source has built a differentiated, vertically integrated position in the North American specialty equipment market, combining in-house manufacturing with a large, young, and highly utilized rental fleet and a diversified customer base tied to durable infrastructure and electrification tailwinds. Record 2025 revenue and double-digit Adjusted EBITDA growth demonstrate real operating momentum, and near-term visibility from a $335 million sales backlog and record fleet utilization support management's characterization of an early-stage secular upcycle in utility, telecom, and rail infrastructure spending. However, the company remains heavily levered relative to its equity value, continues to post GAAP net losses, and operates in capital-intensive, cyclical end markets where a slowdown in infrastructure capex could quickly pressure both rental yields and equipment sales. The investment case rests on continued fleet utilization gains and deleveraging translating record top-line growth into sustainable GAAP profitability, particularly as the company transitions to a new two-segment reporting structure in 2026.