Custom Truck One Source, Inc. (CTOS) | The Buildout — AI Infrastructure
The Verdict
Custom Truck One Source rents and sells specialty trucks and equipment used to build and maintain electric transmission and distribution lines. It is an indirect, second-order beneficiary of the AI buildout through rising electricity demand and grid investment, not a direct supplier to data centers.
| Market Cap | — |
| Revenue (TTM) | $2.0B |
| Revenue Growth | +9.4% |
| EBITDA Margin (TTM) | 21.9% |
| Net Debt | $2.5B |
| Earnings Beats | 2 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Management calls the current environment the "early stages of what could be a once-in-a-generation transmission demand super cycle" and says equipment is staged for projects that begin in 2027–2028.
- SER Q2 2026 utilization was 81.6% (+400 bps yoy) on average OEC on rent of $1.37B (+13% yoy); on-rent yield reached 39.4%.
- SER Q2 adjusted EBITDA margin hit 53%, up more than 700 bps yoy; rental gross margin was at the higher end of the low-to-mid-70s range and described as sustainable.
- Net leverage fell to 3.85x at Q2, down 0.17 turns sequentially and more than 0.8 turns yoy; H1 levered FCF improved about $40M yoy.
- FY2026 revenue and adjusted EBITDA guidance were raised; STEM equipment sales hit an all-time quarterly high and June quoting rose 26% yoy.
What We’re Watching
- Chassis and attachment supply is the company-identified likely bottleneck; management said that is where a bottleneck would come from if one were to show up.
- EPA 2027 prebuy inventory: management targets roughly $100M inventory reduction but only about $20M cash because 75–80% is floor-planned; non-conformance penalty estimate is $4,500–$7,000 per unit.
- STEM gross margin is slightly lower on national-account mix, and new-sales gross margin sits at the low end of the 15–18% range.
- Federal infrastructure dollars have not yet shown up meaningfully; waste/dump and infrastructure end markets are soft, with pickup expected later 2026 or into 2027.
The thesis is strengthening on current evidence: rental KPIs are high, STEM is converting record deliveries, and full-year guidance has been raised twice while leverage improves. The main open question is whether the 2027–2028 transmission project pipeline converts into named awards and backlog, because data centers are a disclosed tailwind rather than a direct driver.
Earnings
Q2 2026 revenue was $563.4M, up 10.2% year over year, and adjusted EBITDA was $117M, up 25%. GAAP net income swung from a $28M net loss in the prior-year quarter to $10M, with about $19M of the improvement attributed to a favorable income-tax swing. Equipment sales reached an all-time quarterly high; management said a portion of Q2 deliveries, including rental-purchase-option buyouts, was pulled forward from the second half.
| Metric | Q1 FY2026 | Q4 FY2025 | Q1 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $462M | $528M | $422M | +9.3% |
| Gross margin | 22.3% | 20.6% | 17.9% | +440bps |
| EBITDA | $100M | $125M | $82M | +22.3% |
| EPS | $-0.02 | $0.09 | $-0.08 | −76.8% |
| Rental utilization | 81.6% | 81.4% | 77.6% | +5.2% |
| STEM sales order backlog | $322M | $411M | n/a | — |
We believe that we are in the early stages of what could be a once-in-a-generation transmission demand super cycle.— Ryan McMonagle, CEO, 2026-08-06
Management tone: Management's tone became more bullish over Q1 and Q2 2026, but the optimism was anchored to rental KPIs and customer planning rather than the AI narrative. On the Q2 call, the CEO called data centers a good tailwind but not the core driver, volunteered a Q3 pull-forward caution, and kept the strongest rhetoric for the transmission cycle.
Management Guidance
FY2026 guidance was raised on the Q2 call: revenue to $2.1–$2.2 billion (implied 8–13% year over year) and adjusted EBITDA to $437.5–$455 million (implied 14–19%). Segment guides are $850–$875 million for SER and $1.63–$1.7 billion for STEM; non-rental capex stayed $40–$50 million, net rental fleet investment rose to $170–$200 million, and levered FCF held at more than $50 million. Q3 is expected up high single digits year over year but below Q2, with a roughly 48/52 H1/H2 split and Q4 seasonally strongest. Year-end net leverage is reaffirmed meaningfully below 4x.
Trajectory
Revenue stepped down from $528.2M in Q4 FY2025 to $461.6M in Q1 FY2026, and the code-computed trajectory labels revenue decelerating on a sequential basis. Margins are expanding: Q1 FY2026 gross margin was 22.3% against 17.9% a year earlier, and EBITDA margin was 21.6% against 19.3%. Q2 2026 revenue of $563.4M and adjusted EBITDA of $117M were records, though management said Q2 included pull-forward from the second half.
The Model
The locked model projection for FY+1 is revenue of $2,080M and EBITDA of $447M, a 21.5% margin. FY+2 projects revenue of $2,250M and EBITDA of $506M, a 22.5% margin. The near-term revenue projection is slightly below the raised FY2026 revenue guidance of $2.1B–$2.2B, while the EBITDA projection sits within the raised $437.5M–$455M range. The projection is anchored by continuing SER yield and utilization strength; the FY+2 step-up reflects the company's stated 2027–2028 transmission project starts and further margin expansion.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $1.9B | $2.1B | $2.2B |
| YoY Growth | — | +7.0% | +8.2% |
| EBITDA | $415M | $447M | $506M |
| EBITDA Margin | 21.4% | 21.5% | 22.5% |
Projections are the median of 5 independent model runs. The model’s revenue sits 4.2% above analyst consensus.
FY2026 guidance was raised on the Q2 call: revenue to $2.1–$2.2 billion (implied 8–13% year over year) and adjusted EBITDA to $437.5–$455 million (implied 14–19%). Segment guides are $850–$875 million for SER and $1.63–$1.7 billion for STEM; non-rental capex stayed $40–$50 million, net rental fleet investment rose to $170–$200 million, and levered FCF held at more than $50 million. Q3 is expected up high single digits year over year but below Q2, with a roughly 48/52 H1/H2 split and Q4 seasonally strongest. Year-end net leverage is reaffirmed meaningfully below 4x.
What Could Go Right — and Wrong
- Named transmission project awards convert the 2027–2028 pipeline into disclosed backlog in the coming months.
- Federal infrastructure dollars arrive in late 2026 or 2027, adding waste/dump and infrastructure orders to STEM.
- EPA 2027 rulemaking keeps or raises non-conformance penalties, validating the pre-positioned chassis inventory.
- Transmission mix pushes on-rent yield toward the low 40s, expanding SER margin further.
- STEM order intake accelerates as strong June quoting converts; backlog rebuilds toward 4–6 months.
- Chassis or attachment supply tightens before the fleet is fully positioned; management flagged chassis and attachment supply as the likely bottleneck.
- EPA 2027 prebuy inventory becomes a drag if final rule or demand softens; only about $20M of the $100M inventory reduction is expected to become cash.
- National-account mix keeps STEM new-sales gross margin at the low end of 15–18%.
- Federal infrastructure dollars slip further while T&D comps normalize, causing STEM order deceleration.
- Data-center on-site generation or utility capex slowdown bypasses T&D, unwinding SER utilization and yield.
Looking Ahead
The next 12 months hinge on three strands: the EPA 2027 NOx rulemaking after the early-July 2026 proposed changes, the Cummins X10 full-production timing later in Q3 2027, and whether the transmission projects management says start in 2027–2028 show up in named awards. Federal infrastructure dollars are expected to appear in backlog later in 2026 or into 2027, while Q3 and Q4 results test the pull-forward-shaped guidance and Q4's seasonal strength.
- Q3 2026Q3 results — Tests high-single-digit yoy growth below Q2 after pull-forward disclosure.
- H2 2026Second-half order intake — June quoting +26% needs to convert into STEM order growth.
- Early July 2026EPA 2027 NOx proposed changes — Tests the $4,500–$7,000 penalty estimate and chassis prebuy.
- Late 2026–2027Federal infrastructure funds release — Tests waste/dump and infrastructure order pickup in STEM.
- Later Q3 2027Cummins X10 full production — Tests chassis availability and pricing through the 2027 transition.
- 2027–2028Transmission project starts — Tests management's once-in-a-generation supercycle claim.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $1.8B | $1.9B | $2.0B | +7.9% |
| Gross Margin | 19.4% | 18.9% | 19.9% | 52bps |
| EBITDA | $366M | $415M | $2.1B | +13.3% |
| EBITDA Margin | 20.3% | 21.4% | 21.9% | +103bps |
| Net Income | −$29M | −$31M | −$17M | -8.7% |
| Free Cash Flow | −$354M | −$108M | −$1.5B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)19.9%
- EBITDA Margin (TTM)21.9%
- Net Margin (TTM)-0.9%
- ROIC3.8%
- FCF Conversion-7.7%
- SBC / Revenue0.1%
The Company
Custom Truck One Source provides specialty equipment rentals, new and used equipment sales, aftermarket parts, and repair, maintenance, and customization services. It is a one-stop shop for customers building and maintaining electric utility transmission and distribution infrastructure, with equipment that includes bucket trucks, digger derricks, cable placers, boom trucks, and cranes. The company is positioned as an indirect beneficiary of AI-driven electricity demand through grid buildout, not a direct data-center supplier.
The company operates more than 40 U.S. and Canadian locations, with its Kansas City, Missouri headquarters and "mega-center" performing the majority of production and manufacturing. Since Q1 2026 it reports two segments: Specialty Equipment Rentals and Specialty Truck Equipment and Manufacturing. Management describes its rental fleet as one of the industry's largest focused on electric utility T&D, and the fleet is just over three years old, which the company uses to reduce maintenance capex while generating cash.
Business Segments
Competitive Landscape
The intel file's neighbor read-through includes Herc, Quanta, MasTec, MYR Group, and Caterpillar as inferred supply-chain comparators rather than disclosed competitors. The central read is that CTOS is getting better rental momentum in its T&D niche than Herc is in broad specialty rental; Herc's overall pro forma rental revenue was still down 3% in Q1 2026 while CTOS's T&D-exposed SER revenue grew 20% in Q2.
- Herc Holdings (HRI)Specialty rental comparator; overall pro forma rental revenue was still down 3% in Q1 2026, while CTOS's T&D niche showed stronger momentum.
Supply Chain
CTOS sits between chassis and equipment suppliers and the utility-scale contractors that build transmission lines. Its own filings name chassis as the core supply dependency, while neighbor calls corroborate strong downstream T&D demand.
More on CTOS: Earnings recap