KANSAS CITY, Mo. April 27, 2026 – (BUSINESS WIRE) – Custom Truck One Source, Inc. (NYSE: CTOS), a leading provider of specialty equipment to the electric utility, telecom, rail, forestry, waste management and other infrastructure-related end markets, today reported financial results for the three months ended March 31, 2026.

•Record first quarter revenue of $461.6 million, an increase of $39.4 million, or 9.3%, compared to the first quarter of 2025

•Increased Average OEC on rent by $141.4 million, or 11.8%, compared to the first quarter of 2025

•Gross profit of $103.1 million, an increase of $17.5 million, or 20.5%, compared to the first quarter of 2025

•Adjusted Gross Profit of $159.3 million, an increase of $23.6 million, or 17.4%, compared to the first quarter of 2025

•Net loss of $4.1 million, an improvement of $13.7 million, or 76.9%, compared to the first quarter of 2025

•Adjusted EBITDA of $98.0 million, an increase of $24.6 million, or 33.4%, compared to the first quarter of 2025

•Given strong conditions in the transmission and distribution (“T&D”) end markets, increasing 2026 full year Adjusted EBITDA1 guidance range from $410M - $435M to $415M - $440M

“In the first quarter, we achieved record first-quarter revenue and delivered substantial year-over-year growth in revenue and Adjusted EBITDA of 9% and 33%, respectively. The sustained performance in our core T&D markets continues to be the primary driver of performance within our SER segment and for the Company as a whole. For the quarter, our rental fleet achieved average utilization of 81.4%, up 370 basis points versus the first quarter of last year. We ended the quarter with total OEC of $1.66 billion, the highest in our history, which should support our expected growth within SER in 2026,” said Ryan McMonagle, Chief Executive Officer of CTOS. “Our STEM segment also had a strong quarter, delivering revenue of $268 million, which excludes $95 million of sales to our SER segment. Our strong performance in the quarter allowed us to make substantial progress in reducing our net leverage, down almost 30 basis points versus the end of the previous quarter. We continue to be optimistic about the remainder of 2026, as CTOS remains well-positioned to benefit from secular tailwinds driven by data center investments, electrification, utility grid upgrades and infrastructure investment. For 2026, we remain focused on Adjusted EBITDA growth, working capital management, free cash flow generation and continued deleveraging.” McMonagle added.

Beginning January 1, 2026, CTOS is reporting our results under two reportable segments: (1) Specialty Equipment Rentals (“SER”) and (2) Specialty Truck Equipment and Manufacturing (“STEM”). The new SER segment consists of our historical Equipment Rental Solutions (“ERS”) segment (except for certain used sales to be accounted for by STEM) and a portion of our historical Aftermarket Parts and Services (“APS”) segment, and the new STEM segment will consist of our historical Truck and Equipment Sales (“TES”) segment, certain used sales that previously were accounted for by ERS and a portion of our historical APS segment. We are also reflecting intercompany activity between the two segments, which is ultimately eliminated in consolidation. This new segment reporting reflects how CTOS’s business is managed and how resources are allocated in 2026 and utilizes Adjusted EBITDA as the segments’ profit measure. Segment Adjusted EBITDA is defined as segment operating income or loss before depreciation and amortization, further excluding the effects of purchase accounting adjustments and the impact of sales-type lease accounting for certain leases containing rental purchase options (or “RPOs”).

Management believes this new presentation better reflects the positioning of CTOS’s strategies and operations portfolio and better reflects key economic drivers, capital intensity, and margin profiles of the respective new segments, as well as aligns our external reporting with how management allocates capital and evaluates performance. Prior period amounts have been recast to reflect the change to two reportable segments.

1-Specifically identifiable lease revenue receivables not deemed probable of collection are recorded as a reduction of rental revenue. This is classified as a segment expense for Segment Adjusted EBITDA reviewed by the chief operating decision maker.

2-Impact of sales-type lease accounting for certain leases containing RPOs: this impact is excluded from the measure of Adjusted EBITDA utilized by our CODM to allocate resources and to assess the performance of our segments as we believe continuing to reflect the transactions as an operating lease better reflects the economics of the transactions given our large portfolio of rental contracts.

3-Excludes the non-cash impact of purchase accounting, impact of sales-type lease accounting for certain leases containing RPOs, further excluding depreciation.

1-Excludes the non-cash impact of purchase accounting.

See the Company’s Quarterly Report on Form 10-Q for the three months ended March 31, 2026 for a reconciliation of segment-level adjusted EBITDA to Consolidated income (loss) before income taxes.

(a) Ending OEC — Ending original equipment cost (“OEC”) is the original equipment cost of units at the end of the measurement period.

(b) Average OEC on rent — Average OEC on rent is calculated as the weighted-average OEC on rent during the stated period.

(c) Fleet utilization — total number of days the rental equipment was rented during a specified period of time divided by the total number of days available during the same period and weighted based on OEC.

(d) OEC on rent yield (“ORY”) — a measure of return realized by our rental fleet during a period. ORY is calculated as rental revenue (excluding freight recovery and ancillary fees) during the stated period divided by the Average OEC on rent for the same period. For periods of less than 12 months, the ORY is adjusted to an annualized basis.

(e) Sales order backlog — purchase orders received for customized and stock equipment. Sales order backlog should not be considered an accurate measure of future net sales.

The increase of 18% in rental revenue in the first quarter of 2026 compared to the first quarter of 2025 was the result of improved average fleet utilization (which increased to 81.4% compared to 77.7%) driven by increased rental volume, with average OEC on rent increasing by 12% year-over-year. Compared to the first quarter of 2025, SER rental equipment sales increased 26.5% in the first quarter of 2026 due to an increase in buyout activity of rental contracts with purchase options. SER adjusted EBITDA in the first quarter of 2026 increased 24% compared to the first quarter of 2025.

Equipment sales in our STEM segment increased 4.4% in the first quarter of 2026 compared to the first quarter of 2025 driven by demand for forestry vehicles. Adjusted EBITDA increased by $19.8 million in the first quarter of 2026 compared to the first quarter of 2025. Our STEM backlog was down 2% compared to the first quarter of 2025, and remains within our expected range of four to six months.

The decrease in net loss in the first quarter of 2026 compared to the first quarter of 2025 was primarily due to higher operating income as a result of higher rental revenue driven by higher average OEC on rent as well as strong new equipment sales.

Adjusted EBITDA for the first quarter of 2026 was $98.0 million, a 33.4% increase compared to the first quarter of 2025, which was largely driven by increased gross profit and lower interest expense on variable-rate floor plan liabilities from lower inventory levels.

As of March 31, 2026, cash and cash equivalents were $9.6 million, total debt outstanding was $1,648.5 million, net debt was $1,638.9 million and our net leverage ratio was 4.02x. Availability under the senior secured credit facility was $256.9 million as of March 31, 2026, and based on our borrowing base, we have an additional $191.6 million of suppressed availability that we can potentially utilize by upsizing our existing facility.

We are reaffirming our full year consolidated revenue for 2026 and increasing our Adjusted EBITDA1, 4 guidance to reflect our strong first quarter and continued momentum in the rental business.

Consolidated CTOS:

•Revenue is expected to increase 3% to 9% year-over-year, with Adjusted EBITDA1, 4 expected to increase 8% to 15%

•Net rental fleet investment (purchases less proceeds) for 2026 is expected to be approximately $150 million to $170 million, with mid-single digit net OEC growth, reflecting a meaningful reduction from over $250 million in 2025

•Inventory months on hand is expected to continue trending toward the targeted level of below six months, supporting working capital improvement; and

•Levered free cash flow2, 4 is expected to exceed $50 million for 2026 and net leverage ratio3, 4 is expected to be meaningfully below four times by the end of fiscal 2026; the longer-term target remains achieving a net leverage ratio3, 4 below three times in 2027.

Specialty Equipment Rentals (SER):

•The rental business continues to perform very strong with OEC on rent, utilization and gross margin all continuing to perform ahead of expectations in 2026

•Demand for equipment serving the utility transmission and distribution market remains very strong and at record levels, and further penetration of the vocational rental market is expected to provide incremental growth

•Average fleet age ended 2025 at just over 2.9 years, which positioned the Company to reduce rental fleet investment while continuing to pursue growth, with OEC expected to increase by a mid-single digit percentage in 2026. Average fleet age at the end of the first quarter was just under 3 years, aging slightly.

Specialty Truck Equipment & Manufacturing (STEM):

•Third-party new sales revenue is expected to increase 3% to 10% in 2026 compared to 2025, supported by continued customer demand, stable supply chain conditions and relationships with key customers, chassis suppliers and attachment suppliers

•Total STEM revenue is expected to be down modestly to flat year-over-year due solely to lower intercompany rental sales/capex

•Sales order backlog increased by over $55 million (nearly 20%) in the fourth quarter of 2025 and a further $76 million (nearly 23%) in the first quarter of 2026, currently sitting at 4.5 months LTM third-party new sales and remains within the targeted range of four to six months

“Looking ahead, our focus in 2026 is on disciplined execution – translating strong end-market demand into profitable growth, free cash flow generation, and further balance sheet improvement. Our rental business continues to perform very strong, driven by demand in our utility transmission and distribution markets, and we are seeing the benefit of that strength flow through to margins and Adjusted EBITDA1, 4. We expect to show flat revenue and single digit year-over-year Adjusted EBITDA1, 4 growth in the second quarter. With a younger, highly utilized fleet and improving working capital dynamics, we believe CTOS is positioned to drive higher returns on invested capital while maintaining financial flexibility as we invest selectively to support our customers’ long-term needs, and to translate that into meaningful free cash flow generation,” said Chris Eperjesy, Chief Financial Officer of CTOS.

5- Beginning January 1, 2026, transactions between segments are accounted for as if completed on an arm’s length basis using a cost-plus methodology.

The Company has scheduled a conference call to discuss its first quarter 2026 results at 9:00 a.m. ET on April 28, 2026, via a live audio-only webcast. Both the webcast link and a presentation of financial information will be posted on the “Events & Presentations” page of investors.customtruck.com. A replay of the call will be available by accessing the same webcast link detailed above.

CTOS is one of the largest providers of specialty equipment, parts, tools, accessories and services to the electric utility transmission and distribution, telecommunications, and rail markets in North America, with a differentiated “one-stop-shop” business model. CTOS offers its specialized equipment to a diverse customer base for the maintenance, repair, upgrade, and installation of critical infrastructure assets, including electric lines, telecommunications networks, and rail systems. The Company's coast-to-coast rental fleet of more than 10,350 units includes aerial devices, boom trucks, cranes, digger derricks, pressure drills, stringing gear, hi-rail equipment, repair parts, tools, and accessories. For more information, please visit customtruck.com.

Investors and others should note that we announce material financial and operational information to our investors using our investor relations website (investors.customtruck.com) in addition to press releases, SEC filings and public conference calls. The information we post through our investor relations website may be deemed material. Accordingly, investors should monitor our investor relations website in addition to following our press releases, SEC filings and public conference calls.

This press release includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995, as amended, and within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and Section 27A of the Securities Act of 1933, as amended. When used in this press release, the words “estimates,” “projected,” “expects,” “anticipates,” “forecasts,” “suggests,” “plans,” “targets,” “intends,” “believes,” “seeks,” “may,” “will,” “should,” “future,” “propose,” “could,” “would,” and variations of these words or similar expressions (or the negative versions of such words or expressions) are intended to identify forward-looking statements. These forward-looking statements are not guarantees of future performance, conditions or results, and involve a number of known and unknown risks, uncertainties, assumptions and other important factors, many of which are outside the Company's management’s control, that could cause actual results or outcomes to differ materially from those discussed in this press release. This press release is based on certain assumptions that the Company's management has made in light of its experience in the industry, as well as the Company’s perceptions of historical trends, current conditions, expected future developments and other factors the Company believes are appropriate in these circumstances and at such time.

As you read and consider this press release, you should understand that these statements are not guarantees of performance or results. Many factors could affect the Company’s actual performance and results and could cause actual results to differ materially from those expressed in this press release. Important factors, among others, that may affect actual results or outcomes include: increases in labor costs, changes in U.S. trade policy including tariffs, our inability to obtain raw materials, component parts and/or finished goods in a timely and cost-effective manner, and our inability to manage our rental equipment in an effective manner; competition in the equipment dealership and rental industries; our sales order backlog may not be indicative of the level of our future revenues; increases in unionization rate in our workforce; our inability to attract and retain key personnel, including our management and skilled technicians; material disruptions to our operation and manufacturing locations as a result of public health concerns, equipment failures, natural disasters, work stoppages, power outages or other reasons; any further increase in the cost of new equipment that we purchase for use in our rental fleet or for sale as inventory aging or obsolescence of our existing equipment, and the fluctuations of market value thereof; disruptions in our supply chain; our business may be impacted by government spending; we may experience losses in excess of our recorded reserves for receivables; uncertainty relating to macroeconomic conditions, unfavorable conditions in the capital and credit markets and our customers’ inability to obtain additional capital as required; increases in price of fuel or freight; regulatory, technological advancement, or other changes in our core end-markets may affect our customers’ spending; our strategic initiatives including acquisitions and divestitures may not be successful and may divert our management’s attention away from operations and could create general customer uncertainty; the interest of our majority stockholder, which may not be consistent with the other stockholders; volatility of our common stock market price; our significant indebtedness, which may adversely affect our financial position, limit our available cash and our access to additional capital, prevent us from growing our business and increase our risk of default; our inability to generate cash, which could lead to a default; significant operating and financial restrictions imposed by our debt agreements; changes in interest rates, which could increase our debt service obligations on the variable rate indebtedness and decrease our net income and cash flows; disruptions or security compromises affecting our information technology systems or those of our critical services providers could adversely affect our operating results by subjecting us to liability, and limiting our ability to effectively monitor and control our operations, adjust to changing market conditions, or implement strategic initiatives; we are subject to complex laws and regulations, including environmental and safety regulations that can adversely affect cost, manner or feasibility of doing business; we are subject to a series of risks related to climate change; and increased attention to, and evolving expectations for, sustainability and environmental, social and governance initiatives. For a more complete description of these and other possible risks and uncertainties, please refer to the Company's Annual Report on Form 10-K for the year ended December 31, 2025, and its subsequent reports filed with the Securities and Exchange Commission. All forward-looking statements attributable to the Company or persons acting on its behalf are expressly qualified in their entirety by the foregoing cautionary statements.

Brian Perman, Vice President, Investor Relations

investors@customtruck.com

(unaudited)

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In our press release and schedules, and on the related conference call, we report certain financial measures that are not required by, or presented in accordance with, United States generally accepted accounting principles (“GAAP”). We utilize these financial measures to manage our business on a day-to-day basis and some of these measures are commonly used in our industry to evaluate performance by excluding items considered to be non-recurring. We believe these non-GAAP measures provide investors expanded insight to assess performance, in addition to the standard GAAP-based financial measures. The press release schedules reconcile the most directly comparable GAAP measure to each non-GAAP measure that we refer to. Although management evaluates and presents these non-GAAP measures for the reasons described herein, please be aware that these non-GAAP measures have limitations and should not be considered in isolation or as a substitute for revenue, operating income/loss, net income/loss, earnings/loss per share or any other comparable measure prescribed by GAAP. In addition, we may calculate and/or present these non-GAAP financial measures differently than measures with the same or similar names that other companies report, and as a result, the non-GAAP measures we report may not be comparable to those reported by others.

Adjusted EBITDA. Adjusted EBITDA is a non-GAAP performance measure that we use to monitor our results of operations, to measure performance against debt covenants and performance relative to competitors. We believe Adjusted EBITDA is a useful performance measure because it allows for an effective evaluation of operating performance, without regard to financing methods or capital structures. We exclude the items identified in the reconciliations of net income (loss) to Adjusted EBITDA because these amounts are either non-recurring or can vary substantially within the industry depending upon accounting methods and book values of assets, including the method by which the assets were acquired, and capital structures. Adjusted EBITDA should not be considered as an alternative to, or more meaningful than, net income (loss) determined in accordance with GAAP. Certain items excluded from Adjusted EBITDA are significant components in understanding and assessing a company’s financial performance, such as a company’s cost of capital and tax structure, as well as the historical costs of depreciable assets, none of which are reflected in Adjusted EBITDA. Our presentation of Adjusted EBITDA should not be construed as an indication that results will be unaffected by the items excluded from Adjusted EBITDA. Our computation of Adjusted EBITDA may not be identical to other similarly titled measures of other companies.

We define Adjusted EBITDA as net income or loss before interest expense (excluding interest on floorplan financing), income taxes, depreciation and amortization, share-based compensation, and other items that we do not view as indicative of ongoing performance. Our Adjusted EBITDA includes an adjustment to exclude the effects of purchase accounting adjustments when calculating the cost of inventory and used equipment sold. When inventory or equipment is purchased in connection with a business combination, the assets are revalued to their current fair values for accounting purposes. The consideration transferred (i.e., the purchase price) in a business combination is allocated to the fair values of the assets as of the acquisition date, with amortization or depreciation recorded thereafter following applicable accounting policies; however, this may not be indicative of the actual cost to acquire inventory or new equipment that is added to product inventory or the rental fleets apart from a business acquisition. We also include an adjustment to remove the impact of accounting for certain of our rental contracts with customers containing a rental purchase option that are accounted for under GAAP as a sales-type lease. We include this adjustment because we believe continuing to reflect the transactions as an operating lease better reflects the economics of the transactions given our large portfolio of rental contracts. These, and other, adjustments to GAAP net income or loss that are applied to derive Adjusted EBITDA are specified by our senior secured credit agreement and the indenture of our senior secured notes.

Adjusted Gross Profit. We present total gross profit excluding rental equipment depreciation (“Adjusted Gross Profit”) as a non-GAAP financial performance measure. This measure differs from the GAAP definition of gross profit, as we do not include the impact of depreciation expense, which represents non-cash expense. We use this measure to evaluate operating margins and the effectiveness of the cost of our rental fleet.

Net Debt. We present the non-GAAP financial measure “Net Debt,” which is total debt (the most comparable GAAP measure, calculated as current and long-term debt, excluding deferred financing fees, plus current and long-term finance lease obligations) minus cash and cash equivalents. We believe this non-GAAP measure is useful to investors to evaluate our financial position.

Net Leverage Ratio. Net leverage ratio is a non-GAAP performance measure used by management and we believe it provides useful information to investors because it is an important measure to evaluate our debt levels and progress toward leverage targets, which is consistent with the manner our lenders and management use this measure. We define net leverage ratio as net debt divided by Adjusted EBITDA for the previous twelve-month period (“last twelve months,” or “LTM”).

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Adjusted EBITDA is defined as net income (loss), as adjusted for provision for income taxes, interest expense, net (excluding interest on floorplan financing), depreciation of rental equipment and non-rental depreciation and amortization, and further adjusted for the impact of the fair value mark-up of acquired rental fleet, business acquisition and merger-related costs, including integration, the impact of accounting for certain of our rental contracts with customers that are accounted for under GAAP as sales-type lease and stock compensation expense. This non-GAAP measure is subject to certain limitations.

(1)    Represents the non-cash impact of purchase accounting, net of accumulated depreciation, on the cost of equipment and inventory sold. The equipment and inventory acquired received a purchase accounting step-up in basis, which is a non-cash adjustment to the equipment cost pursuant to our ABL Credit Agreement and Indenture.

(2)    Represents transaction and other costs related to acquisitions of businesses; costs associated with closed operations; costs associated with restructuring and business optimization activities (inclusive of systems establishment costs); employee retention and/or severance costs; costs related to start-up/pre-openings and openings of locations; reconfiguration or consolidation of facilities or equipment conversion costs. These adjustments are presented as adjustments to net income (loss) pursuant to our ABL Credit Agreement and Indenture.

(3)    Represents the impact of sales-type lease accounting for certain leases containing rental purchase options (or “RPOs”), as the application of sales-type lease accounting is not deemed to be representative of the ongoing cash flows of the underlying rental contracts. The adjustments are made pursuant to our ABL Credit Agreement and Indenture. The components of this adjustment are presented in the table below:

(4) Represents non-cash share-based compensation expense associated with the issuance of restricted stock units.

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The following table presents the reconciliation of Adjusted Gross Profit:

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The following table presents the reconciliation of SER segment Adjusted Gross Profit:

The following table presents the reconciliation of SER segment Adjusted Rental Gross Profit:

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The following table presents the reconciliation of Net Debt:

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The following table presents the reconciliation of the Net Leverage Ratio:

(1) The following tables presents the calculation of LTM Adjusted EBITDA for the periods ended March 31, 2026 and December 31, 2025: