Limbach Holdings Inc

Note 1 –Business and Organization

Limbach Holdings, Inc. (the “Company,” “we” or “us”), a Delaware corporation headquartered in Warrendale, Pennsylvania, was formed on July 20, 2016 as a result of a business combination with Limbach Holdings LLC (“LHLLC”). The Company is a building systems solutions firm who strives to be an indispensable partner to building owners with mission critical mechanical (heating, ventilation, air conditioning), electrical, and plumbing infrastructure. The Company’s focus is insix vertical markets: healthcare, industrial and manufacturing, data centers, life science, higher education and cultural and entertainment. The Company provides comprehensive facility services with expertise in the management and maintenance of mechanical, electrical, plumbing and controls systems who uniquely combines engineering solutions with field installation expertise to provide custom solutions. The Company has approximately 1,400 employees in 20 offices across the eastern United States and operates primarily in the Eastern and Midwest regions of the United States.

The Company operates intwo segments, (i) Owner Direct Relationships (“ODR”), in which the Company performs owner direct projects and/or provides maintenance or service primarily on mechanical, plumbing or electrical systems, building controls and specialty contracting projects to existing buildings direct to, or assigned by, building owners or property managers, and (ii) General Contractor Relationships (“GCR”), in which the Company generally manages new construction or renovation projects that involve primarily mechanical, plumbing, or electrical services awarded to the Company by general contractors or construction managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less thantwo years.

Note 2 –Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and the rules and regulations of the Securities and Exchange Commission (“SEC”) and based on the assumption that the Company will continue as a going concern, which contemplates the realization of assets and the settlement of liabilities in the normal course of business.

Principles of Consolidation

References in these financial statements to the Company refer collectively to the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC (“LFS”), Limbach Company LLC (“LC LLC”), Limbach Company LP, Harper Limbach LLC, Harper Limbach Construction LLC, Limbach Facility & Project Solutions LLC, Jake Marshall, LLC (“JMLLC”), Coating Solutions, LLC (“CSLLC”), ACME Industrial Piping, LLC (“ACME”), Industrial Air, LLC (“Industrial Air”), Kent Island Mechanical, LLC (“Kent Island”) and Consolidated Mechanical, LLC (“Consolidated Mechanical”) for all periods presented, unless otherwise indicated. All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements for assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, the reported amounts of revenue and expenses during the reported period, and the accompanying notes. Management believes that its most significant estimates and assumptions have been based on reasonable and supportable assumptions and the resulting estimates are reasonable for use in the preparation of the consolidated financial statements. The Company’s significant estimates include estimates associated with revenue recognition on construction contracts, costs incurred through each balance sheet date, intangibles, property and equipment, fair value accounting for acquisitions, insurance reserves, income tax valuation allowances, fair value of contingent consideration arrangements and contingencies. If the underlying estimates and assumptions upon which the consolidated financial statements are based change in the future, actual amounts may differ from those included in the accompanying consolidated financial statements.

Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less when purchased and are carried at cost, which approximates fair value, due to their short-term maturities. The Company’s cash and cash equivalents consist principally of currency on hand, demand deposits at commercial banks, overnight repurchase agreements, amounts invested in highly liquid money market funds and U.S. Treasury Bills. At times, the Company’s cash deposits may exceed the amount of federal insurance provided on such deposits. The Company has not experienced any losses in such accounts and believes it is not exposed to significant credit risk beyond the normal credit risk associated with commercial banking relationships. See Note 9 – Fair Value Measurements for further information.

Restricted Cash

Restricted cash is cash held at a commercial bank in an imprest account held for the purpose of funding workers’ compensation and general liability claims against the Company. This amount is replenished either when depleted or at the beginning of each month.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Company’s consolidated balance sheets that sum to the total of the same amounts shown in the consolidated statements of cash flows:

Accounts Receivable and Allowance for Credit Losses

The carrying value of the Company’s receivables, net of the allowance for credit losses, represents their estimated net realizable value. The Company develops its allowances for credit losses, which represent an estimate of expected losses over the remaining contractual life of its receivables, using an aging method. Under the aging method, the Company assigns its accounts receivable to a level of delinquency and applies a loss rates to each class. Loss rates are determined based on historical loss experiences with customers, the consideration of a customer’s financial condition, current market economic conditions and a forecast of future economic conditions when appropriate. When the Company becomes aware of a customer’s inability to meet its financial obligation, a specific reserve is recorded to reduce the receivable to the expected amount to be collected. Balances that are still outstanding after management has used reasonable collection efforts are written off through a charge to the valuation allowance and an adjustment of the account receivable. The majority of customer balances at each balance sheet date are collected within twelve months. As is common practice in the industry, the Company classifies all accounts receivable as current assets. Based on assessments by management, allowances for credit losses were approximately $0.4 million and $0.3 million at December 31, 2024 and 2023, respectively.

Joint Ventures

The Company accounts for its participation in certain special purpose, project specific joint ventures under the equity method of accounting. The Company’s entry into these joint ventures is for the purpose of bidding, negotiating and completing specific projects. The Company and its joint venture partner(s) separately enter into their own sub-contracts with the joint venture for each party’s respective portion of the work. All revenue and expenses and the related contract assets and liabilities related to the Company’s sub-contract are recorded within the Company’s statements of operations and balance sheets, similarly to any other construction project. The joint venture itself does not accumulate any profits or losses, as the joint venture revenue is equal to the sum of the subcontracts it issues to the joint venture partners. The voting power and management of the joint ventures are shared equally by the joint venture partners, qualifying these entities for joint venture treatment under GAAP. The shared voting power and management responsibilities allow the Company to exercise significant influence without controlling the joint venture entity. As such, the Company applies the equity method of accounting as defined in ASC Topic 323, Investments – Equity Method and Joint Ventures.

Revenue Recognition

The Company’s revenue is primarily derived from construction-type and service contracts that generally range from three months totwo years. The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. ASC Topic 606 provides for a five-step model for recognizing revenue from contracts with customers as follows:

1. Identify the contract

2. Identify performance obligations

3. Determine the transaction price

4. Allocate the transaction price

5. Recognize revenue

Identify the contract with a customer. A contract with a customer exists when: (a) the parties have approved the contract and are committed to perform their respective obligations, (b) the rights of the parties can be identified, (c) payment terms can be identified, (d) the arrangement has commercial substance, and (e) collectability of consideration is probable. Judgment is required when determining if the contractual criteria are met, specifically in the earlier stages of a project when a formally executed contract may not yet exist. In these situations, the Company evaluates all relevant facts and circumstances, including the existence of other forms of documentation or historical experience with its customers that may indicate a contractual agreement is in place and revenue should be recognized. In determining if the collectability of consideration is probable, the Company considers the customer’s ability and intention to pay such consideration through an evaluation of several factors, including an assessment of the creditworthiness of the customer and its prior collection history with such customer.

Identify the performance obligations in the contract. At contract inception, the Company assesses the goods or services promised in a contract and identifies, as a separate performance obligation, each distinct promise to transfer goods or services to the customer. The identified performance obligations represent the “unit of account” for purposes of determining revenue recognition. In order to properly identify separate performance obligations, the Company applies judgment in determining whether each good or service provided is: (a) capable of being distinct, whereby the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer, and (b) distinct within the context of the contract, whereby the transfer of the good or service to the customer is separately identifiable from other promises in the contract.

Determine the transaction price. The transaction price represents the amount of consideration to which the Company expects to be entitled in exchange for transferring promised goods or services to its customers. The consideration promised within a contract may include fixed amounts, variable amounts, or both. To the extent the performance obligation includes variable consideration, the Company estimates the amount of variable consideration to be included in the transaction price utilizing one of two prescribed methods, depending on which method better predicts the amount of consideration to which the entity will be entitled. Such methods include: (a) the expected value method, whereby the amount of variable consideration to be recognized represents the sum of probability weighted amounts in a range of possible consideration amounts, and (b) the most likely amount method, whereby the amount of variable consideration to be recognized represents the single most likely amount in a range of possible consideration amounts. When applying these methods, the Company considers all information that is reasonably available, including historical, current, and estimates of future performance. The expected value method is typically utilized in situations where a contract contains a large number of possible outcomes while the most likely amount method is typically utilized in situations where a contract has only two possible outcomes.

Variable consideration is included in the transaction price only to the extent it is probable, in the Company’s judgment, that a significant future reversal in the amount of cumulative revenue recognized under the contract will not occur when the uncertainty associated with the variable consideration is subsequently resolved. This threshold is referred to as the variable consideration constraint. In assessing whether to apply the variable consideration constraint, the Company considers if factors exist that could increase the likelihood or the magnitude of a potential reversal of revenue, including, but not limited to, whether: (a) the amount of consideration is highly susceptible to factors outside of the Company’s influence, such as the actions of third parties, (b) the uncertainty surrounding the amount of consideration is not expected to be resolved for a long period of time, (c) the Company’s experience with similar types of contracts is limited or that experience has limited predictive value, (d) the Company has a practice of either offering a broad range of price concessions or changing the payment terms and conditions of similar contracts in similar circumstances, and (e) the contract has a large number and broad range of possible consideration amounts.

Pending change orders represent one of the most common forms of variable consideration included within contract value and typically represent contract modifications for which a change in scope has been authorized or acknowledged by the Company’s customer but the final adjustment to contract price is yet to be negotiated. In estimating the transaction price for pending change orders, the Company considers all relevant facts, including documented correspondence with the customer regarding acknowledgment of and/or agreement with the modification, as well as historical experience with the customer or similar contractual circumstances. Based upon this assessment, the Company estimates the transaction price, including whether the variable consideration constraint should be applied.

Contract claims are another form of variable consideration which is common within its industry. Claim amounts represent revenue that has been recognized for contract modifications that are not submitted or are in dispute as to both scope and price. In estimating the transaction price for claims, the Company considers all relevant facts available. However, given the uncertainty surrounding claims, including the potential long-term nature of dispute resolution and the broad range of possible consideration amounts, there is an increased likelihood that any additional contract revenue associated with contract claims is constrained. The resolution of claims involves negotiations and, in certain cases, litigation. In the event litigation costs are incurred by the Company in connection with claims, such litigation costs are expensed as incurred, although it may seek to recover these costs.

Allocate the transaction price to performance obligations in the contract. For contracts that contain multiple performance obligations, the Company allocates the transaction price to each performance obligation based on a relative standalone selling price. The Company determines the standalone selling price based on the price at which the performance obligation would have been sold separately in similar circumstances to similar customers. If the standalone selling price is not observable, the Company estimates the standalone selling price taking into account all available information such as market conditions and internal pricing guidelines. In certain circumstances, the standalone selling price is determined using an expected profit margin on anticipated costs related to the performance obligation.

Recognize revenue as performance obligations are satisfied. Throughout the execution of its construction-type contracts, the Company recognizes revenue with the continuous transfer of control to the customer. The customer typically controls the asset under construction by either contractual termination clauses or by the Company’s rights to payment for work already performed on the asset under construction that does not have an alternative use for the Company.

Because control transfers over time, revenue is recognized to the extent of progress towards completion of the performance obligations. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services provided. The Company generally uses the cost-to-cost method for its contracts, which measures progress towards completion for each performance obligation based on the ratio of costs incurred to date to the total estimated costs at completion for the respective performance obligation. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Revenue, including estimated profits, is recorded proportionately as costs are incurred. Cost of operations includes labor, materials, subcontractor costs, and other direct and indirect costs, including depreciation and amortization.

Certain construction-type contracts include retention provisions to provide assurance to the Company’s customers that it will perform in accordance with the contract terms and are not considered a financing benefit. The balances billed but not paid by customers pursuant to these provisions generally become due upon completion and acceptance of the project work by the customer. The Company has determined there are no significant financing components in its contracts during the years ended December 31, 2024 and 2023.

For the Company’s service-type contracts, revenue is also generally recognized over time as the customer simultaneously receives and consumes the benefits of its performance as the Company performs the service. For its fixed price service-type contracts with specified service periods, revenue is generally recognized on a straight-line basis over such service period when the Company’s inputs are expended evenly, and the customer receives and consumes the benefits of its performance throughout the contract term.

Due to uncertainties inherent in the estimation process, it is possible that estimates of costs to complete a performance obligation will be revised in the near-term. For those performance obligations for which revenue is recognized using a cost-to-cost input method, changes in total estimated costs, and related progress towards complete satisfaction of the performance obligation, are recognized on a cumulative catch-up basis in the period in which the revisions to the estimates are made. When the current estimate of total costs for a performance obligation indicate a loss, a provision for the entire estimated loss on the unsatisfied performance obligation is made in the period in which the loss becomes evident.

Costs to fulfill its contracts (“pre-bid costs”) that are not expected to be recovered from the customer are expensed as incurred and included in selling, general and administrative expenses on its consolidated statements of operations.

In accordance with industry practice, the Company classifies as current all assets and liabilities relating to the performance of contracts.

See Note 4 – Revenue from Contracts with Customers for further information.

Changes in Estimates on Construction Contracts

The accuracy of the Company’s revenue and profit recognition in a given period depends on the accuracy of its estimates of the cost to complete each project. There are a number of factors that can contribute to changes in estimates of contract cost and profitability. The most significant of these include:

•The completeness and accuracy of the original bid;

•costs associated with scope changes;

•expected, or actual, resolution terms for claims;

•achievement of contract incentives;

•changes in costs of labor and/or materials;

•extended overhead and other costs due to owner, weather and other delays;

•subcontractor performance issues;

•changes in productivity expectations;

•site conditions that differ from those assumed in the original bid;

•changes from original design on design-build projects;

•the availability and skill level of workers in the geographic location of the project;

•a change in the availability and proximity of equipment and materials;

•its ability to fully and promptly recover on claims and back charges for additional contract costs, and

•the customer’s ability to properly administer the contract.

Subsequent to the inception of a construction-type contract in the Company’s ODR and GCR segments, the transaction price could change for various reasons, including the executed or estimated amount of change orders and unresolved contract modifications and claims to or from owners. Changes that are accounted for as an adjustment to existing performance obligations are allocated on the same basis at contract inception. Otherwise, changes are accounted for as separate performance obligation(s) and the separate transaction price is allocated.

Changes are made to the transaction price from unapproved change orders to the extent the amount can be reasonably estimated and recovery is probable.

On certain projects, the Company has submitted and has pending unresolved contract modifications and claims to recover additional costs and the associated profit, if applicable, to which it believes it is entitled under the terms of contracts with customers, subcontractors, vendors or others. The owners or their authorized representatives and/or other third parties may be in partial or full agreement with the modifications or claims, or may have rejected or disagree entirely or partially as to such entitlement.

Changes are made to the transaction price from affirmative claims with customers to the extent that additional revenue on a claim settlement with a customer is probable and estimable. A reduction to costs related to claims with non-customers with whom the Company has a contractual arrangement (“back charges”) is recognized when the estimated recovery is probable and estimable. Recognizing claims and back charge recoveries requires significant judgments of certain factors including, but not limited to, dispute resolution developments and outcomes, anticipated negotiation results, and the cost of resolving such matters.

The foregoing factors, as well as the stage of completion of contracts in process and the mix of contracts at different margins may cause fluctuations in gross profit and gross profit margin from period to period. Generally, if the contract is at an early stage of completion, the current period impact is smaller than if the same change in estimate is made to the contract at a later stage of completion. Significant changes in cost estimates, particularly in the Company’s larger, more complex projects have had, and can in future periods have, a significant effect on its profitability. Management evaluates changes in estimates on a contract by contract basis and discloses significant changes, if material, in the notes to the consolidated financial statements. The cumulative catch-up method is used to account for revisions in estimates. Provisions for estimated losses on uncompleted contracts are recognized in the period in which such losses are determined.

Goodwill and Impairment of Long-Lived Assets

Goodwill is evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. The Company's qualitative assessment of potential impairment may result in the determination that a quantitative impairment analysis is not necessary. Under this elective process, the Company assesses qualitative factors to determine whether the existence of events or circumstances leads the Company to determine that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then a quantitative assessment is not required. However, if the Company concludes otherwise, a quantitative impairment analysis is performed.

If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. In the case of a quantitative assessment, the Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. See Note 5 – Goodwill and Intangible Assets for further detail.

The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate, in management's judgment, that the carrying value of such assets may not be recoverable. With respect to property, plant and equipment and finite lived intangibles, asset recoverability is measured by comparing the carrying value of the asset or asset group with its expected future pre-tax undiscounted cash flows. These cash flow estimates require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating cost and other factors. If the carrying amount exceeds the expected future undiscounted cash flows, the Company recognizes an impairment equal to the excess of carrying value over fair value as determined by quoted market prices in active markets or present value techniques if quotes are unavailable. The determination of the fair value using present value techniques requires the Company to make projections and assumptions regarding the probability of a range of outcomes and the rates of interest used in the present value calculations. Any changes the Company makes to these projections and assumptions could result in significant revisions to its evaluations of recoverability and the recognition of additional impairments. See Note 5 – Goodwill and Intangible Assets for further discussion on impairments of long-lived assets.

Intangible Assets

The Company’s indefinite-lived intangible assets associated with its trade name are evaluated for impairment at least annually or more frequently if events or circumstances indicate that it is more likely than not that the fair value of its indefinite-lived intangible asset are less than their carrying amount. The Company’s identifiable intangible assets with finite lives are either amortized over their useful lives or over the period the Company expects to receive the related economic benefit based upon estimated future cash flows. The Company reviews finite-lived intangible assets for impairment whenever facts and circumstances indicate that their carrying values may not be fully recoverable.

See Note 5 – Goodwill and Intangible Assets for further discussion of the Company’s intangible assets.

Property and Equipment, net

Property and equipment, with the exception of the Company’s fleet vehicle finance leases, are recorded at cost and depreciated on a straight-line basis over their estimated useful lives. For buildings and leasehold improvements, the Company’s useful lives range from five years to 40 years; for machinery and equipment, useful lives range from three years to 10 years. Expenditures for maintenance and repairs are expensed as incurred. Leasehold improvements for the Company’s real estate operating leases are amortized over the lesser of the term of the related lease or the estimated useful lives of the improvements.

The following table summarizes the Company’s property and equipment:

(1)See additional information provided in Note 14 – Leases.

(2) Includes net property and equipment of approximately $0.4 million and $0.5 million for the year ended December 31, 2024 related to assets acquired in the Kent Island and Consolidated Mechanical transactions, respectively.

Depreciation and amortization expense on property and equipment was $7.2 million, $6.4 million and $6.6 million for the years ended December 31, 2024, 2023 and 2022, respectively.

Leases

A lease contract conveys the right to use an underlying asset for a period of time in exchange for consideration. At inception, the Company determines whether a contract contains a lease by determining if there is an identified asset and if the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. Leases are classified as either operating or finance, based on the Company’s evaluation of certain criteria.

With the exception of short-term leases (leases with an initial term of 12 months or less), at lease commencement, the Company measures and records a lease liability equal to the present value of the remaining lease payments, generally discounted using quoted borrowing rates on its secured debt as the implicit rate is not readily determinable on many of its real estate operating leases. For the Company’s fleet vehicles classified as financing leases, it uses the stated interest rate in the lease.

On the lease commencement date, the amount of the right-of-use (“ROU”) assets consist of the following:

•the amount of the initial measurement of the lease liability;

•any lease payment made at or before the commencement date, minus any lease incentives received; and

•any initial direct costs incurred.

Most of the Company’s operating lease contracts have the option to extend or renew. The Company assesses the option for individual leases, and it generally considers the base term to be the term of lease contracts. See Note 14 – Leases for additional information.

The Company periodically evaluates whether events and circumstances have occurred that indicate that the remaining balances of its ROU assets may not be recoverable. The Company uses estimates of future undiscounted cash flows, as well as other economic and business factors, to assess the recoverability of these assets.

Deferred Financing Costs

Deferred financing costs are deferred and amortized to interest expense using the effective interest rate method over the term of the related long-term debt agreement, and the straight-line method for the revolving credit agreement.

Debt issuance costs related to the issuance and/or extension, as applicable, of the Company’s term loans are reflected as a direct reduction from the carrying amount of long-term debt. Debt issuance costs related to revolving credit facilities are capitalized and reflected as an other asset.

Stock-Based Compensation

Stock-based compensation awards granted to executives, employees, former executives and non-employee directors are measured at fair value and recognized as an expense. For awards with service conditions only, the Company recognizes compensation expense on a graded vesting basis over the requisite service period for each separately vesting tranche of the award based on the closing market price of the Company’s common stock at the grant date. For awards with service and performance conditions, the Company recognizes compensation expense based on the closing market price of the Company’s common stock at the grant date using the straight-line method over the requisite service period. Estimates of compensation expense for an award with performance conditions are based on the probable outcome of the performance conditions. The cumulative effect of changes in the probability outcomes are recorded in the period in which the changes occur. The Company has elected to account for forfeitures as they occur to determine the amount of compensation expense to be recognized each period. See also Note 17 – Management Incentive Plans for further information.

Income Taxes

The provision for income taxes includes federal, state and local taxes. The Company accounts for income taxes in accordance with ASC Topic 740 -Income Taxes, which requires the use of the asset and liability method. Under this method, deferred tax assets and liabilities and income or expense is recognized for the expected future tax consequences of temporary differences between the financial statement carrying values and their respective tax bases, using enacted tax rates expected to be applicable in the years in which the temporary differences are expected to reverse. Changes in tax rates are recorded to deferred tax assets and liabilities and reflected in the provision for income taxes during the period that includes the enactment date.

The Company evaluates the realizability of its deferred tax assets and establishes a valuation allowance when it is more likely than not that all or a portion of the deferred tax assets will not be realized. Potential for recovery of deferred tax assets is evaluated by estimating the future taxable profits expected, scheduling of anticipated reversals of taxable temporary differences, and considering prudent and feasible tax planning strategies.

Any interest or penalties incurred related to unrecognized tax benefits are recorded as tax expense in the provision for income tax expense line item of the accompanying consolidated statements of operations. The consolidated financial statements reflect expected future tax consequences of such positions presuming the taxing authorities have full knowledge of the position and all relevant facts, but without considering time values.

Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 -Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

See also Note 9 – Fair Value Measurements for further information.

Recent Accounting Pronouncements

In November 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This update aims to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 requires disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss. The update also requires disclosure regarding the chief operating decision maker and expands the interim segment disclosure requirements. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company concluded that the updated guidance did not materially affect its segment reporting disclosures. The Company’s current processes, systems and controls already comply with the enhanced requirements, ensuring consistency between internal management reporting and external financial statements.

In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, and in January 2025, the FASB issued ASU 2025-01, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date. ASU 2024-03 requires additional disclosure of the nature of expenses included in the income statement as well as disclosures about specific types of expenses included in the expense captions presented in the income statement. ASU 2024-03, as clarified by ASU 2025-01, is effective for the Company for its annual reporting for fiscal 2028 and for interim period reporting beginning in fiscal 2029 on a prospective basis. Both early adoption and retrospective application are permitted. The Company is currently evaluating the impact that the adoption of these standards will have on its consolidated financial statements and disclosures.

In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures (Topic 740). This update requires entities to disclose additional information with respect to the effective tax rate reconciliation and to disclose the disaggregation by jurisdiction of income tax expense and income taxes paid. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is currently evaluating the impact of ASU 2023-09 on its consolidated financial statements.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. The Company is currently assessing the impact of this pronouncement on its consolidated financial statements.

Note 3 –Acquisitions

Consolidated Mechanical Transaction

On December 2, 2024 (the “Consolidated Mechanical Effective Date”), LFS, Consolidated Mechanical, and the owner of Consolidated Mechanical (the “Consolidated Mechanical Seller”) entered into a Purchase Agreement (the “Consolidated Mechanical Purchase Agreement”) pursuant to which LFS purchased all of the outstanding equity interests in Consolidated Mechanical from the Consolidated Mechanical Seller (the “Consolidated Mechanical Transaction”). The Consolidated Mechanical Transaction closed on the Consolidated Mechanical Effective Date. As a result of the Consolidated Mechanical Transaction, Consolidated Mechanical became a wholly-owned indirect subsidiary of the Company. Consolidated Mechanical serves the heavy industrial, power and commercial markets. Consolidated Mechanical is a premier provider of mechanical, millwright, steel fabrication, plumbing construction, maintenance, and outage services to owners of complex process systems in the industrial sector. The acquisition extends the Company’s reach into the industrial sector, with new exposure to the power generation, food processing, manufacturing, and metal markets in Kentucky, Illinois and Michigan.

Total consideration paid by the Company for the Consolidated Mechanical Transaction at closing was $23.0 million (the “Consolidated Mechanical Closing Purchase Price”), which was funded by cash on hand. The payment is subject to typical adjustments for working capital. Of the consideration paid to the Consolidated Mechanical Seller, approximately $0.3 million was held in escrow for indemnification purposes. The purchase price is subject to customary post-closing adjustments. In addition, the Consolidated Mechanical Seller may receive up to an aggregate of $2.0 million in cash, consisting oftwo individual tranches of $1.0 million pursuant to the terms of the Consolidated Mechanical Purchase Agreement, if the gross profit of Consolidated Mechanical equals or exceeds approximately (i) $6.8 million in the 12-month period beginning on the Consolidated Mechanical Effective Date (the “First Consolidated Mechanical Earnout Period”) or (ii) $6.8 million in the 12-month period beginning on the first anniversary of the Consolidated Mechanical Effective Date (the “Second Consolidated Mechanical Earnout Period” and together with the First Consolidated Mechanical Earnout Period, the “Consolidated Mechanical Earnout Payments”).

Preliminary Allocation of Purchase Price. The Consolidated Mechanical Transaction was accounted for as a business combination using the acquisition method. The following table summarizes the preliminary purchase price and estimated fair values of assets acquired and liabilities assumed as of the Consolidated Mechanical Effective Date, with any excess of purchase price over estimated fair value of the identified net assets acquired recorded as goodwill. As a result of the acquisition, the Company recognized $11.1 million of goodwill, which was fully allocated to the Company's ODR segment and fully deductible for tax purposes. Such goodwill primarily related to anticipated future earnings. The following table summarizes the preliminary allocation of the fair value of the assets and liabilities of the Consolidated Mechanical Transaction as of the Consolidated Mechanical Effective Date by the Company.

As of December 31, 2024, the allocation of the purchase price has not been finalized with respect to the valuation of identifiable intangible assets acquired, the fair value of certain tangible assets acquired and liabilities assumed, goodwill and tax related matters. A final determination of fair value of assets acquired and liabilities assumed relating to the acquisition could differ from the preliminary purchase price allocation. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable, but no later than one year from the Consolidated Mechanical Effective Date.

For working capital items, such as cash and cash equivalents, accounts receivable, other current assets, accounts payable and accrued expenses and other current liabilities, the carrying value was assumed to represent the fair value of these assets and liabilities due to their current nature. There was no difference between the contract value and fair value of accounts receivable acquired.

The estimated fair value of property and equipment, generally consisting of machinery, and equipment, was estimated using the cost approach. Significant unobservable inputs in the estimate of fair value under this approach included management's assumptions about the replacement costs for similar assets, the relative age of the acquired assets and any potential economic or functional obsolescence associated with the acquired assets. As a result, the estimated fair value of the property and equipment represented a Level 3 fair value measurement.

As part of the preliminary purchase price allocation, the Company identified certain definite-lived intangible assets associated with customer relationships with third-party customers and the acquired trade name and trademarks. The fair value of the customer relationships with third-party customers was determined using the multi-period excess earning method under the income approach. The multi-period excess earnings method is a variation of the discounted cash-flow analysis, which isolates the cash flows that can be associated with a single intangible asset and measures fair value by discounting it back to present value. The fair value of the acquired trade name and trademarks intangible asset was determined using an income approach, specifically known as the relief-from-royalty method. This method requires identifying the future revenue that would be generated by the trademark, multiplying it by a royalty rate deemed to be avoided through ownership of the asset and discounting the projected royalty savings amounts back to the acquisition date. The royalty rate used in the valuation was based on a consideration of market rates for similar categories of assets. Some of the more significant estimates and assumptions inherent in determining the fair value of the identifiable intangible assets are associated with forecasting cash flows and profitability, which represent Level 3 inputs.

The Company calculates amortization of the acquired intangible assets using the straight-line method over the estimated useful lives of each acquired intangible assets. The estimated annual amortization expense for each of the next five years is approximately $1.3 million in 2025 and $1.2 million for each of the next four subsequent years.

Intangible assets, net as of December 31, 2024 are detailed below.

The aforementioned contingent Consolidated Mechanical Earnout Payments are associated with the achievement of specified gross profit milestones. The Company estimated that the fair value of the Consolidated Mechanical Earnout Payments was approximately $0.8 million at the date of acquisition, of which $0.4 million of this balance was included in other long-term liabilities in the Company’s consolidated balance sheet as of December 31, 2024. The Company determined the initial fair value of the Consolidated Mechanical Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Effective Date, the Consolidated Mechanical Earnout Payments associated with the Consolidated Mechanical Transaction were valued utilizing a discount rate of 10.4%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Consolidated Mechanical Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage. Subsequent to the Consolidated Mechanical Effective Date, the Consolidated Mechanical Earnout Payments are re-measured at fair value each reporting period. Changes in the estimated fair value of the contingent payments subsequent to the acquisition date are recognized immediately in earnings.

Kent Island Transaction

On September 3, 2024 (the “Kent Island Effective Date”), LFS, Kent Island, and the owner of Kent Island (the “Kent Island Seller”) entered into a Purchase Agreement (the “Kent Island Purchase Agreement”) pursuant to which LFS purchased all of the outstanding equity interests in Kent Island from the Kent Island Seller (the “Kent Island Transaction”). The Kent Island Transaction closed on the Kent Island Effective Date. As a result of the Kent Island Transaction, Kent Island became a wholly-owned indirect subsidiary of the Company. Kent Island is a leading provider of building systems solutions in the Greater Washington, DC metro area, including suburban Maryland and Northern Virginia. Kent Island excels in designing, engineering, installing, servicing, and maintaining mechanical and plumbing systems for complex facilities. The acquisition expands the Company’s market share within its existing operating footprint, provides further exposure to an attractive customer base and supports the Company's continued ODR growth strategy.

Total consideration paid by the Company for the Kent Island Transaction at closing was $15.0 million (the “Kent Island Closing Purchase Price”), which was funded by cash on hand. The payment is subject to typical adjustments for working capital. Of the consideration paid to the Kent Island Seller, approximately $0.4 million was held in escrow for indemnification purposes. The purchase price is subject to customary post-closing adjustments. In addition, the Kent Island Seller may receive up to an aggregate of $5.0 million in cash, consisting oftwo individual tranches of $2.5 million pursuant to the terms of the Kent Island Purchase Agreement, if the gross profit of Kent Island equals or exceeds approximately (i) $3.3 million in the 12-month period beginning on the Kent Island Effective Date (the “First Kent Island Earnout Period”) or (ii) $0.2 million in the 12-month period beginning on the first anniversary of the Kent Island Effective Date (the “Second Kent Island Earnout Period” and together with the First Kent Island Earnout Period, the “Kent Island Earnout Payments”).

Allocation of Purchase Price. The Kent Island Transaction was accounted for as a business combination using the acquisition method. The following table summarizes the preliminary purchase price and estimated fair values of assets acquired and liabilities assumed as of the Kent Island Effective Date, with any excess of purchase price over estimated fair value of the identified net assets acquired recorded as goodwill. As a result of the acquisition, the Company recognized $5.5 million of goodwill, which was allocated between the Company's ODR and GCR segments and fully deductible for tax purposes. Such goodwill primarily related to anticipated future earnings. The fair value estimates for the assets acquired and liabilities assumed, as well as the Company's estimates and assumptions, were subject to change as the Company obtained additional information during the measurement period. During the measurement period, if the Company obtained new information regarding facts and circumstances that existed as of the Kent Island Effective Date that, if known, would have resulted in revised estimated values of those assets or liabilities, the Company would accordingly revise its fair value estimates and purchase price allocation. Measurement period adjustments are reflected as if the adjustments had been made as of the Kent Island Effective Date. The impact of all changes that do not qualify as measurement period adjustments would have been included in current period earnings. The following table summarizes the preliminary allocation of the fair value of the assets and liabilities of the Kent Island Transaction as of December 31, 2024.

(1)Measurement period adjustments recorded during the year-ended December 31, 2024 included changes in the total cash consideration for the Kent Island Transaction, resulting in a net increase of approximately $0.7 million to goodwill. The measurement period adjustments related to certain working capital adjustments made in connection with the finalization of the transactions closing date cash consideration.

For working capital items, such as cash and cash equivalents, accounts receivable, other current assets, accounts payable and accrued expenses and other current liabilities, the carrying value was assumed to represent the fair value of these assets and liabilities due to their current nature. There was no difference between the contract value and fair value of accounts receivable acquired.

The estimated fair value of property and equipment, generally consisting of machinery, and equipment, was estimated using the cost approach. Significant unobservable inputs in the estimate of fair value under this approach included management's assumptions about the replacement costs for similar assets, the relative age of the acquired assets and any potential economic or functional obsolescence associated with the acquired assets. As a result, the estimated fair value of the property and equipment represented a Level 3 fair value measurement.

As part of the purchase price allocation, the Company identified certain definite-lived intangible assets associated with customer relationships with third-party customers, acquired backlog and the acquired trade name and trademarks. The fair value of the customer relationships with third-party customers and acquired backlog was determined using the multi-period excess earning method under the income approach. The multi-period excess earnings method is a variation of the discounted cash-flow analysis, which isolates the cash flows that can be associated with a single intangible asset and measures fair value by discounting it back to present value. The fair value of the acquired trade name and trademarks intangible asset was determined using an income approach, specifically known as the relief-from-royalty method. This method requires identifying the future revenue that would be generated by the trademark, multiplying it by a royalty rate deemed to be avoided through ownership of the asset and discounting the projected royalty savings amounts back to the acquisition date. The royalty rate used in the valuation was based on a consideration of market rates for similar categories of assets. Some of the more significant estimates and assumptions inherent in determining the fair value of the identifiable intangible assets are associated with forecasting cash flows and profitability, which represent Level 3 inputs.

The Company calculates amortization of the acquired intangible assets using the straight-line method over the estimated useful lives of each acquired intangible assets. The estimated annual amortization expense for 2025 is approximately $3.5 million and $1.1 million for each of the next four years.

Intangible assets, net as of December 31, 2024 are detailed below.

The aforementioned contingent Kent Island Earnout Payments are associated with the achievement of specified gross profit milestones. The Company estimated that the fair value of the Kent Island Earnout Payments was approximately $4.4 million at the date of acquisition, of which $2.2 million of this balance was included in other long-term liabilities. The Company determined the initial fair value of the Kent Island Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Effective Date, the Kent Island Earnout Payments associated with the Kent Island Transaction were valued utilizing discount rates of 14.9%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Kent Island Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage. Subsequent to the Kent Island Effective Date, the Kent Island Earnout Payments are re-measured at fair value each reporting period. Changes in the estimated fair value of the contingent payments subsequent to the acquisition date are recognized immediately in earnings.

ACME Transaction

On July 3, 2023 (the “ACME Effective Date”), the Company, LFS and ACME, and the owner of ACME (the “ACME Seller”) entered into a Purchase Agreement (the “ACME Purchase Agreement”) pursuant to which LFS purchased all of the outstanding equity interests in ACME from the ACME Seller (the “ACME Transaction”). The ACME Transaction closed on the ACME Effective Date. As a result of the ACME Transaction, ACME became a wholly-owned indirect subsidiary of the Company. ACME specializes in performing industrial maintenance, capital project work, and emergency services for specialty chemical and manufacturing customers, and is a leading mechanical solutions provider for hydroelectric producers. The acquisition expands the Company’s market share within its existing operating footprint, provides further exposure to an attractive customer base and supports the Company's continued ODR growth strategy.

Total consideration paid by the Company for the ACME Transaction at closing was $5.0 million (the “ACME Closing Purchase Price”), consisting of cash paid to the ACME Seller, subject to typical adjustments for working capital. Of the consideration paid to the ACME Seller, approximately $0.4 million was held in escrow for indemnification purposes. The purchase price was subject to customary post-closing adjustments. In addition, the ACME Seller may receive up to an aggregate of $2.5 million in cash, consisting oftwo individual tranches of $0.5 million and $2.0 million pursuant to the terms of the ACME Purchase Agreement, if the gross profit of ACME equals or exceeds (i) $2.0 million in the 12-month period beginning on the ACME Effective Date (the “First ACME Earnout Period”) or (ii) $2.5 million in the 12-month period beginning on the first anniversary of the ACME Effective Date (the “Second ACME Earnout Period” and together with the First ACME Earnout Period, the “ACME Earnout Payments”). Notwithstanding the foregoing, if ACME’s Adjusted EBITDA, as defined within the ACME Purchase Agreement, for calendar year 2023 was equal to or exceeded $2.5 million then the Company would have been required to pay the ACME Seller $2.5 million, and the ACME Seller would not have been entitled to any further payment. This particular earnout condition was not met as of December 31, 2023.

Industrial Air Transaction

On November 1, 2023 (the “IA Effective Date”), the Company, LFS and Industrial Air, and the owner of Industrial Air (the “IA Seller”) entered into a Purchase Agreement (the “IA Purchase Agreement”) pursuant to which LFS purchased all of the outstanding equity interests in Industrial Air from the IA Seller (the “Industrial Air Transaction”). The Industrial Air Transaction closed on the IA Effective Date. As a result of the Industrial Air Transaction, Industrial Air became a wholly-owned indirect subsidiary of the Company. Industrial Air serves industrial customers throughout the Southeast United States and along the Eastern seaboard, focusing on delivering engineered air handling systems, including air conditioning and air filtration, along with controls systems and maintenance work. In addition, Industrial Air manufactures a wide range of components for air conditioning and filtration systems. The Industrial Air Transaction provides the Company with a presence in an attractive and growing geographic market, where the acquired entity has a strong ODR customer base and supports the Company’s continued ODR growth strategy.

Total consideration paid by the Company for the Industrial Air Transaction at closing was $13.5 million (the “IA Closing Purchase Price”), consisting of cash paid to the IA Seller, subject to typical adjustments for working capital. Of the consideration paid to the IA Seller, approximately $1.4 million was held in escrow for indemnification purposes. The purchase price was subject to customary post-closing adjustments. In addition, the IA Seller may receive up to an aggregate of $6.5 million in cash, consisting oftwo individual tranches of $3.0 million and $3.5 million pursuant to the terms of the Industrial Air Purchase Agreement, if the gross profit of Industrial Air equals or exceeds (i) $7.6 million in the 12-month period beginning on the IA Effective Date (the “First IA Earnout Period”) or (ii) $8.8 million in the 12-month period beginning on the first anniversary of the IA Effective Date (the “Second IA Earnout Period” and together with the First IA Earnout Period, the “IA Earnout Payments”). However, if the gross profit of Industrial Air is less than $7.6 million but exceeds $6.6 million during the First IA Earnout Period then the IA Seller shall receive a portion of the deferred payment made on a pro rata basis. Similarly, if the gross profit of Industrial Air is less than $8.8 million but exceeds $7.8 million during the Second IA Earnout Period then the IA Seller shall receive a portion of the deferred payment made on a pro rata basis.

Note 4 –Revenue from Contracts with Customers

The Company generates revenue from construction type contracts, primarily consisting of fixed-price contracts, to deliver mechanical, plumbing, and electrical construction services to its customers. The duration of its contracts generally ranges from three months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials contracts is recognized as services are performed. The Company believes that its extensive experience in mechanical, plumbing, and electrical projects, and its internal cost review procedures during the bidding process, enable it to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

The Company generally invoices customers on a monthly basis, based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings on uncompleted contracts are recorded as a contract asset until billable under the contract terms. Billings in excess of costs and estimated earnings on uncompleted contracts are recorded as a contract liability until the related revenue is recognizable. The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets

Contract assets include costs and estimated earnings in excess of billings on uncompleted contracts and amounts due under retainage provisions. The components of the contract asset balances as of the respective dates were as follows:

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change.

Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such items as recorded in contract assets and contract liabilities in the consolidated balance sheets was $10.9 million and $19.5 million as of December 31, 2024 and 2023, respectively. The Company currently anticipates that the majority of such amounts will be approved or executed within one year. The resolution of those claims and unapproved change orders that may require litigation or other forms of dispute resolution proceedings may delay the timing of billing beyond one year.

Contract liabilities

Contract liabilities include billings in excess of contract costs and estimated earnings on uncompleted contracts and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

Billings in excess of costs and estimated earnings on uncompleted contracts represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net (overbilling) underbilling position for contracts in process consisted of the following:

Revisions in Contract Estimates

The Company recorded revisions in its contract estimates for certain ODR and GCR projects. During the year ended December 31, 2024, the Company recorded material gross profit write-ups onfour ODR segment projects for a total of $3.9 million that had a net gross profit impact of $0.5 million or more. During the year ended December 31, 2024, the Company recorded material gross profit write-ups onthree GCR projects for a total of $3.3 million and material gross profit write-downs ontwo GCR projects for a total of $1.4 million.

During the year ended December 31, 2023, the Company recorded a material gross profit write-down onone ODR segment project for a total of $1.0 million that had a net gross profit impact of $0.5 million or more. During the year ended

December 31, 2023, the Company recorded material gross profit write-ups of $2.2 million ontwo GCR projects and material gross profit write-downs ontwo GCR projects for a total of $1.3 million.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations include projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of December 31, 2024, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's ODR and GCR segment contracts were $204.1 million and $140.0 million, respectively. The Company currently estimates that 85% and 72% of its ODR and GCR segment remaining performance obligations as of December 31, 2024, respectively, will be recognized as revenue during 2025, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company’s performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer.

Note 5 –Goodwill and Intangible Assets

Goodwill

Goodwill was $33.0 million and $16.4 million as of December 31, 2024 and 2023, respectively. The Company tests its goodwill and indefinite-lived intangible assets allocated to its reporting units for impairment annually on October 1, or more frequently if events or circumstances indicate that it is more likely than not that the fair value of its reporting units and indefinite-lived intangible assets are less than their carrying amount. The Company has the option to assess goodwill for possible impairment by performing a qualitative analysis to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. A quantitative assessment is performed if the qualitative assessments results in a more-likely-than-not determination or if a qualitative assessment is not performed.

On October 1, 2024, the Company performed a qualitative assessment. In conducting that qualitative assessment, the Company analyzed a variety of events or factors that may influence the fair value of the reporting unit or indefinite-life intangible, including, but not limited to: if applicable; changes in the carrying amount of the reporting unit or indefinite-life intangible; actual and projected revenue and operating margin; relevant market data for both the Company and its peer companies; industry outlooks; macroeconomic conditions; liquidity; changes in key personnel; and the Company's competitive position. Significant judgment was used to evaluate the totality of these events and factors to make the determination of whether it is more likely than not that the fair value of the reporting units or indefinite-life intangible is less than its carrying value. No impairment losses were identified as a result of its qualitative assessment during the year ended December 31, 2024.

The following table summarizes the carrying amount and changes in goodwill associated with the Company's segments for the years ended December 31, 2024 and 2023.

(1)Includes certain adjustments, net, to preliminary estimates of fair value within the measurement period of up to one-year from the date of the ACME Transaction. Measurement period adjustments, net, relate primarily to an increase in certain definite-lived intangible assets, partially offset by an increase in total consideration associated with the earnout provision.

(2) Includes certain adjustments to preliminary estimates of fair value within the measurement period of up to one-year from the date of the Industrial Air Transaction. Measurement period adjustments related to certain working capital adjustments.

(3) In connection with the Kent Island Transaction, the Company recorded preliminary goodwill of $4.8 million. During the fourth quarter of 2024, the Company recognized certain adjustments to preliminary estimates of fair value within the measurement period of up to one-year from the date of the Kent Island Transaction. The measurement period adjustments amounted to $0.7 million and related to certain working capital adjustments made in connection with the finalization of the transactions closing date cash consideration.

Intangible Assets

The Company reviews intangible assets with definite lives subject to amortization whenever events or changes in circumstances (triggering events) indicate that the carrying amount of an asset may not be recoverable. Intangible assets with definite lives subject to amortization are amortized on a straight-line or accelerated basis with estimated useful lives ranging from 1 to 15 years. Events or circumstances that might require impairment testing include the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, a significant decline in stock price, or a significant adverse change in the Company’s business climate or regulations affecting the Company.

The Company didnot recognize an impairment charge on its indefinite-lived intangible assets for the years ended December 31, 2024, 2023 and 2022.

Definite-lived and indefinite-lived intangible assets consist of the following:

(1) The Company has determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

Total amortization expense for the Company’s definite-lived intangible assets was $4.7 million, $1.9 million and $1.6 million for the years ended December 31, 2024, 2023 and 2022, respectively. For the years ended December 31, 2024 and 2023, amortization expense included approximately $0.1 million and less than $0.1 million of amortization expense related to a below-market lease recognized as a result of the Industrial Air Transaction, which was recorded as an increase to the Company’s operating lease right-of-use assets on its consolidated balance sheet.

The estimated remaining useful lives of definite-lived intangible assets are as follows:

Estimated amortization expense is as follows for the years ending December 31:

Note 6 –Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities are comprised of the following:

The Company’s construction-type contracts regularly include warranties to end customers that guarantee the work performed against defects in workmanship and the material it supplies. These standard warranties are assurance-type warranties and do not offer any additional services. Therefore, these assurance-type warranties are not considered separate performance obligations and the expected cost of assurance-type warranties are accrued as an expense within cost of revenue.

The Company’s reconciliation of assurance-type warranties are as follows:

The Company also offers service-type warranties on certain construction-type projects. These service-type warranties were not accounted for as a separate performance obligation prior to the adoption of ASC Topic 606. Upon adoption of ASC Topic 606, the Company allocated a portion of the contract's transaction price to the service-type warranty based on its estimated standalone selling price. The accounting for service-type warranties under ASC Topic 606 did not have a material impact to the consolidated financial statements as of December 31, 2024, 2023 and 2022.

Note 7 –Debt

Long-term debt consists of the following obligations as of:

Maturities of long-term debt and finance leases at December 31, 2024 are as follows:

Wintrust Term and Revolving Loans

On February 24, 2021, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a credit agreement (the “Wintrust Credit Agreement”) by and among LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Wintrust Credit Agreement, Lenders provided to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

In conjunction with the Company's acquisitions of JMLLC and CSLLC (the “Jake Marshall Transaction”), the Company entered into an amendment and restatement to the Wintrust Credit Agreement (the “A&R Wintrust Credit Agreement”). In accordance with the terms of the A&R Credit Agreement, Lenders provided to LFS (i) a $35.5 million senior secured term loan (the “A&R Wintrust Term Loan”); and (ii) a $25 million senior secured revolving credit facility with a $5 million sublimit for the issuance of letters of credit (the “A&R Wintrust Revolving Loan” and, together with the Term Loan, the “A&R Wintrust Loans”). The overall Wintrust Term Loan commitment under the A&R Wintrust Credit Agreement was recast at $35.5 million in connection with the A&R Credit Agreement. A portion of the A&R Wintrust Term Loan commitment was used to fund the closing purchase price of the Jake Marshall Transaction. The A&R Credit Agreement was also amended to: (i) permit the Company to undertake the Jake Marshall Transaction, (ii) make certain adjustments to the covenants under the A&R Credit Agreement (which were largely done to make certain adjustments for the Jake Marshall Transaction), (iii) allow for the Jake Marshall Earnout Payments (as defined in Note 9 – Fair Value Measurements) under the Jake Marshall Transaction, and (iv) make other corresponding changes to the A&R Credit Agreement.

On May 5, 2022, the Company, LFS and LHLLC entered into a first amendment and waiver to the A&R Wintrust Credit Agreement (the “First Amendment to the A&R Wintrust Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent. The First Amendment to the A&R Wintrust Credit Agreement modifies certain definitions within the A&R Wintrust Credit Agreement, and makes other corresponding changes, including: (i) the definition of “EBITDA” to allow for the recognition of certain restructuring charges and lease breakage costs not previously specified, (ii) the definition of “Excess Cash Flow” to exclude the aggregate amount of the Earnout Payments paid in cash, (iii) the definition of “Total Funded Debt” to exclude certain capitalized lease obligations for real estate based on the approval of each lender and (iv) the definition of “Disposition” to include a clause for the sale and leaseback of certain real property based on the approval of each lender.

In July 2022, the Company entered into an interest rate swap agreement to manage the risk associated with a portion of its variable-rate long-term debt. The interest rate swap involves the exchange of fixed-rate and variable-rate payments without the exchange of the underlying notional amount on which the interest payments are calculated. The new swap agreement became effective on July 14, 2022 and will terminate on July 31, 2027. The notional amount of the swap agreement is $10.0 million with a fixed interest rate of 3.12%. If the one-month SOFR (as defined in the A&R Credit Agreement) is above the fixed rate, the counterparty pays the Company, and if the one-month SOFR is less than the fixed rate, the Company pays the counterparty, the difference between the fixed rate of 3.12% and the one-month SOFR. The Company has not designated this instrument as a hedge for accounting purposes. As a result, the change in fair value of the derivative instrument is recognized directly in earnings on the Company's consolidated statements of operations as a gain or loss on interest rate swap. See Note 9 for further information regarding this interest rate swap.

On September 28, 2022, the Company, LFS and LHLLC entered into a second amendment and waiver to the amended and restated Wintrust credit agreement (the “Second Amendment to the A&R Wintrust Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent. The Second Amendment to the A&R Wintrust Credit Agreement incorporates certain restricted payment provisions, among other things, to permit LFS to repurchase shares under the Company’s Share Repurchase Program (as defined in Note 8 – Equity).

On May 5, 2023, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement entered into the Second Amended and Restated Credit Agreement (the “Second A&R Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent, which amends and restates the A&R Wintrust Credit Agreement. In accordance with the Second A&R Credit Agreement (i) lenders provided to LFS a $50.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit, an increase of $25.0 million over the A&R Wintrust Revolving Loan, with a maturity date of February 24, 2028 (the “Second A&R Wintrust Revolving Loan”), and (ii) LFS repaid the then outstanding principal balance of the A&R Wintrust Term Loan using proceeds of the Second A&R Wintrust Revolving Loan. Prior to the execution of this agreement, the Company repaid $9.6 million of the then outstanding balance under the A&R Term Loan with cash on hand. As a result of the early repayment of the A&R Wintrust Term Loan and certain changes to the members of the loan syndicate under the Second A&R Wintrust Credit Agreement, the Company wrote off approximately $0.3 million of unamortized debt issuance costs, which are reported as a loss on early debt extinguishment on the Company's consolidated statements of operations.

Prior to its repayment on May 5, 2023 and as of December 31, 2022, the interest rate in effect on the non-hedged portion of the A&R Wintrust Term Loan was 9.25% and 8.50%, respectively. For the period from January 1, 2023 through May 5, 2023, the Company incurred interest on the A&R Wintrust Term Loan at a weighted average annual interest rate of 8.76%. For the year ended December 31, 2022, the Company incurred interest on the A&R Wintrust Term Loan at a weighted average annual interest rate of 5.68%.

The Second A&R Wintrust Revolving Loan bears interest, at LFS’s option, at either the Term SOFR (as defined in the Second A&R Credit Agreement) (with a 0.15% floor) plus 3.10% or the Prime Rate (as defined in the Second A&R Credit Agreement) (with a 3.0% floor), subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA of LFS and its subsidiaries for the most recently ended four fiscal quarters.

The Second A&R Wintrust Revolving Loan is secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the Second A&R Wintrust Revolving Loan is jointly and severally guaranteed by each Wintrust Guarantor.

The Second A&R Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the Second A&R Credit Agreement. The Second A&R Wintrust Revolving Loan also contains three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of LFS and its subsidiaries not to exceed an amount beginning at 2.00 to 1.00, (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter, commencing with the fiscal quarter ending March 31, 2023, and (iii)no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined in the Second A&R Credit Agreement) has occurred and is continuing,50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement.

On March 13, 2024, LFS, LHLLC, and other designated parties entered into a first amendment to the Second A&R Wintrust Credit Agreement (the “First Amendment to the Second A&R Wintrust Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent. The First Amendment to the Second A&R Wintrust Credit Agreement makes certain amendments to the Second A&R Wintrust Credit Agreement, including: (i) modifying the definition of “L/C Sublimit” to increase the sublimit for the issuance of letters of credit from $5.0 million to $10.0 million, (ii) removing the requirement to deliver a Borrowing Base Certificate if outstanding Revolving Loans and Letters of Credit (as such terms are defined in the Second A&R Wintrust Credit Agreement) do not exceed $30.0 million, and (iii) removing certain financial covenants that restrict the Company’s ability to make Unfinanced Capital Expenditures (as defined in the Second A&R Wintrust Credit Agreement).

As of both December 31, 2024 and 2023, the Company had $10.0 million in borrowings outstanding under the Second A&R Wintrust Revolving Loan. During both of the years ended December 31, 2024 and 2023, the maximum outstanding borrowings under the Second A&R Wintrust Revolving Loan at any time was $10.0 million and the average daily balance was $10.0 million and $6.6 million, respectively. For both of the years ended December 31, 2024 and 2023, the Company incurred interest on the Second A&R Wintrust Revolving Loan at a weighted average annual interest rate of 5.72%, inclusive of the net impact associated with the Company's interest rate swap arrangement.

At December 31, 2024, the Company had irrevocable letters of credit in the amount of $4.2 million with its lender to secure obligations under its self-insurance program.

The following is a summary of the applicable margin and commitment fees payable on the Second A&R Wintrust Revolving Loan credit commitment:

As of December 31, 2023, the Company was in compliance with all financial maintenance covenants as required by the Second A&R Credit Agreement.

Sale-Leaseback Financing Transaction

On September 29, 2022, LC LLC and Royal Oak Acquisitions, LLC (the “Purchaser”) consummated the purchase of the real property under a sale and leaseback transaction, with an aggregate value of approximately $7.8 million (a purchase price of approximately $5.4 million and $2.4 million in tenant improvement allowances), pursuant to a purchase agreement under which the Purchaser purchased from LC LLC the Company’s facility and real property in Pontiac, MI (collectively, the “Pontiac Facility”).

In connection with the sale and leaseback transaction, LC LLC and Featherstone St Pontiac MI LLC (the “Landlord”) entered into a Lease Agreement (the “Lease Agreement”), dated September 29, 2022 (the “Lease Effective Date”) for the Pontiac Facility. Commencing on the Lease Effective Date, pursuant to the Lease Agreement, LC LLC has leased the Pontiac Facility, subject to the terms and conditions of the Lease Agreement. The Lease Agreement provides for a term of 25 years (the “Primary Term”). The Lease Agreement also provides LC LLC with the option to extend the Primary Term bytwo separate renewal terms of 5 years each (each a “Renewal Term”). Under the terms of the Lease Agreement, the Company’s annual minimum rent is $499,730, payable in monthly installments, subject to annual increases of approximately 2.5% each year under the Primary Term and for each year under the Renewal Terms, if exercised. LC LLC has a one-time option to terminate the Lease Agreement effective on the last day of the fifteenth lease year by providing written notice to the Landlord as more fully set forth in the Lease Agreement. The one-time termination option of the Lease Agreement would require LC LLC to pay to the Landlord a termination fee of approximately $1.7 million.

Pursuant to the terms and conditions set forth in the Lease Agreement, the Landlord has agreed to provide LC LLC with a tenant improvement allowance in an amount up to $2.4 million. LC LLC is responsible for the initial capital outlay and completion of the agreed upon improvement work. The Landlord will subsequently reimburse LC LLC for such items up to the stated allowance amount.

The Company accounted for the sale and leaseback arrangement as a financing transaction in accordance with ASC Topic 842, “Leases,” as the Lease Agreement was determined to be a finance lease. The Company concluded the Lease Agreement met the qualifications to be classified as a finance lease due to the significance of the present value of the lease payments, using an implicit rate of 11.11% to reflect the Company’s incremental borrowing rate associated with the $5.4 million purchase price as of the Lease Agreement date, compared to the fair value of the Pontiac Facility. The implicit rate associated with the aggregate purchase value, inclusive of tenant improvement allowances, was 6.53% as of the Lease Agreement date.

The presence of a finance lease indicates that control of the Pontiac Facility has not transferred to the Purchaser and, as such, the transaction was deemed a failed sale-leaseback and must be accounted for as a financing arrangement. As a result of this determination, the Company is viewed as having received the sale proceeds from the Purchaser in the form of a hypothetical loan collateralized by its leased facilities. The hypothetical loan is payable as principal and interest in the form of “lease payments” to the Purchaser. Principal repayments are recorded as a reduction to the financing liability. The Company will not derecognize the Pontiac Facility from its books for accounting purposes until the lease ends. No gain or loss was recognized under GAAP related to the sale and leaseback arrangement.

As of December 31, 2024, the financing liability was $5.0 million, net of issuance costs, which was recognized within long-term debt on the Company's consolidated balance sheets. For the years ended December 31, 2024, 2023 and 2022, $0.5 million, $0.5 million and less than$0.1 million of interest expense associated with the financing was recognized, respectively.

Note 8 –Equity

The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001.

Warrants

In conjunction with the Company's initial public offering, the Company issued Public Warrants, Private Warrants and $15 Exercise Price Sponsor Warrants. The Company issued certain Merger Warrants and Additional Merger Warrants in conjunction with the Company's business combination with LHLLC in July 2016. On July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms. During 2023,600,000 warrants exercisable forone share of common stock at an exercise price of $15.00 per share (“$15 Exercise Price Sponsor Warrants”) and 606,476 warrants exercisable forone share of common stock at an exercise price of $12.50 per share (“Merger Warrants”) were exercised on a cashless basis by the holders of the warrants, which resulted in the warrants being converted into 167,564 and 274,742 shares of the Company's common stock, respectively. The remaining 23,167 unexercised Merger Warrants expired by their terms on July 20, 2023.

Incentive Plan

Upon the consummation of the Company’s Business Combination, the Company adopted an omnibus incentive plan (the “Omnibus Incentive Plan”) pursuant to which equity awards may be granted thereunder.

On March 29, 2023, the Board of Directors approved certain amendments to the Company's Omnibus Incentive Plan (the “2023 Amended and Restated Omnibus Incentive Plan”) to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 450,000, for a total of 3,050,000 shares, and extended the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the 2023 Amended and Restated Omnibus Incentive Plan. The amendments were acted upon by the Company's stockholders at the Annual Meeting held on June 22, 2023.

See Note 17 – Management Incentive Plans for a discussion of the Company's management incentive plans for restricted stock units (“RSUs”) granted, vested, forfeited and remaining unvested.

Share Repurchase Program

In September 2022, the Company announced that its Board of Directors approved a share repurchase program (the “Share Repurchase Program”) to repurchase shares of its common stock for an aggregate purchase price not to exceed $2.0 million. The share repurchase authority was valid through September 29, 2023. Share repurchases may have been executed through various means, including, without limitation, open market transactions, privately negotiated transactions or by other means in accordance with federal securities laws. The Share Repurchase Program did not obligate the Company to acquire any particular amount of common stock, and the program may have been suspended or terminated by the Company at any time at its discretion without prior notice. Through September 29, 2023, the Company made share repurchases of approximately $2.0 million under its Share Repurchase Program.

Employee Stock Purchase Plan

Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company’s common stock through payroll deductions during consecutive subscription periods at a purchase price of 85% of the fair market value of a share of the Company’s common stock at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal toten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lastssix months, commencing on January 1st and July 1st of each year. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over thesix-month vesting period during which employees perform related services. Under the ESPP,500,000 shares are authorized to be issued. For the years ended December 31, 2024 and 2023, the Company issued 6,090 and 17,661 shares of its common stock, respectively, to participants in the ESPP who contributed to the plan during these periods. As of December 31, 2024,382,866 shares remain available for future issuance under the ESPP.

Note 9 –Fair Value Measurements

The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable, consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. The Company considers all highly liquid investments purchased with a maturity of 90 days or less on the date of purchase to be cash equivalents. Cash equivalents as of December 31, 2024 consisted of overnight repurchase agreements in which cash from the Company's main operating checking account is invested overnight in highly liquid, short term investments and certain investments in money market funds sponsored by a large financial institution. Cash equivalents as of December 31, 2023 consisted of overnight repurchase agreements, short term investments, one U.S. Treasury Bill and certain investments in money market funds. For the years ended December 31, 2024 and 2023, the Company recognized interest income in the aggregate of approximately $2.2 million and $1.2 million, respectively. The Company didnot recognize interest income during the year ended December 31, 2022. The Company has not experienced any losses in its cash and cash equivalents and management believes the Company is not exposed to significant credit risk with respect to such accounts.

Second A&R Wintrust Revolving Loan

The Company also believes that the carrying value of the Second A&R Wintrust Revolving Loan approximates its respective fair value due to the variable rate on such debt. As of December 31, 2024, the Company determined that the fair value of the Second A&R Wintrust Revolving Loan was $10.0 million. Such fair value was determined using discounted estimated future cash flows using level 3 inputs.

Earnout Payments

As a part of the total consideration for the Jake Marshall Transaction, the former owners of JMLLC and CSLLC were eligible to receive up to an aggregate of $6.0 million in cash, consisting oftwo tranches of $3.0 million, as defined in the purchase agreement, if the gross profit of the acquired companies equals or exceeds $10.0 million in (i) the approximately 12-month period from closing through December 31, 2022 (the “2022 Jake Marshall Earnout Period”) or (ii) fiscal year 2023 (the “2023 Jake Marshall Earnout Period”), respectively (collectively, the “Jake Marshall Earnout Payments”). To the extent, however, that the gross profit of the acquired companies was less than $10.0 million, but exceeds $8.0 million, during any of the 2022 Jake Marshall Earnout Period or 2023 Jake Marshall Earnout Period, the $3.0 million amount was to be prorated for such period. The Company initially recognized $3.1 million in contingent consideration, of which the entire balance was included in other long-term liabilities in the Company’s consolidated balance sheets on December 2, 2021. The fair value of contingent Jake Marshall Earnout Payments is based on generating growth rates on the projected gross margins of the acquired entities and calculating the associated contingent payments based on achieving the earnout targets, which are reassessed each reporting period. In April 2023 and 2024, the Company madetwo separate payments in the amount of $3.0 million to the former owners of JMLLC and CSLLC related to the 2022 Jake Marshall Earnout Period and the 2023 Jake Marshall Earnout Period, respectively.

As a part of the total consideration for the ACME Transaction, the Company recognized $1.5 million in contingent consideration on the ACME Effective Date. The fair value of contingent ACME Earnout Payments is based on generating growth rates on the projected gross margins of ACME and calculating the associated contingent payments based on achieving the earnout targets, which are reassessed each reporting period. The Company determined the initial fair value of the ACME Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the ACME Effective Date, the ACME Earnout Payments associated with the ACME Transaction were valued utilizing discount rates between 12.96% and 21.64%. The discount rates were calculated using the build-up method with a risk-free rate commensurate with the term of the ACME Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage. In September 2024, the Company made a payment in the amount of $0.5 million to the former owner of ACME related to the First ACME Earnout Period.

As a part of the total consideration for the Industrial Air Transaction, the Company recognized $3.2 million in contingent consideration on the IA Effective Date. The fair value of contingent IA Earnout Payments is based on generating growth rates on the projected gross margins of Industrial Air and calculating the associated contingent payments based on achieving the earnout targets, which are reassessed each reporting period. The Company determined the initial fair value of the IA Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the IA Effective Date, the IA Earnout Payments associated with the Industrial Air Transaction were valued utilizing a discount rate of 13.68%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the IA Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage. In February 2025, the Company made a payment in the amount of $3.0 million to the former owner of Industrial Air related to the First Industrial Air Earnout Period.

As a part of the total consideration for the Kent Island Transaction, the Company recognized $4.4 million in contingent consideration on the Kent Island Effective Date. The fair value of contingent Kent Island Earnout Payments is based on generating growth rates on the projected gross margins of Kent Island and calculating the associated contingent payments based on achieving the earnout targets, which are reassessed each reporting period. The Company determined the initial fair value of the Kent Island Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Kent Island Effective Date, the Kent Island Earnout Payments associated with the Kent Island Transaction were valued utilizing a discount rate of 14.9%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Kent Island Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage.

As a part of the total consideration for the Consolidated Mechanical Transaction, the Company recognized $0.8 million in contingent consideration on the Consolidated Mechanical Effective Date. The fair value of contingent Consolidated Mechanical Earnout Payments is based on generating growth rates on the projected gross margins of Consolidated Mechanical and calculating the associated contingent payments based on achieving the earnout targets, which are reassessed each reporting period. The Company determined the initial fair value of the Consolidated Mechanical Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Consolidated Mechanical Effective Date, the Consolidated Mechanical Earnout Payments associated with the Consolidated Mechanical Transaction were valued utilizing a discount rate of 10.4%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Consolidated Mechanical Earnout Payments based on the U.S. Treasury Constant Maturity Yield and certain metric risk premiums determined with reference to a long-term risk free rate, a weighted average cost of capital and certain adjustments for operational leverage.

Based on the Company’s ongoing assessment of the fair value of contingent earnout liabilities, the Company recorded a net increase in the estimated fair value of such liabilities of $3.8 million, $0.7 million and $2.3 million for the years ended December 31, 2024, 2023 and 2022, respectively, which was presented in the change in fair value of contingent consideration in the Company's consolidated statements of operations. The Company determined the fair value of the earnout payments by utilizing the Monte Carlo Simulation method, which represents a Level 3 measurement.

The following table presents the carrying values of the Company's contingent earnout payment obligations included in the accompanying consolidated balance sheets, which approximated fair value at December 31, 2024 and 2023.

(1) In February 2025, the Company made a $3.0 million payment to the former owner of Industrial Air related to the First IA Earnout Period.

(2) In April 2024, the Company made a $3.0 million payment to the former owners of JMLLC and CSLLC related to the 2023 Jake Marshall Earnout Period.

(3)In September 2024, the Company made a payment in the amount of $0.5 million to the former owner of ACME related to the First ACME Earnout Period.

Interest Rate Swap

The fair value of the interest rate swap is determined using widely accepted valuation techniques and reflects the contractual terms of the interest rate swap including the period to maturity, and while there are no quoted prices in active markets, it uses observable market-based inputs, including interest rate curves and implied volatilities. The fair value analysis also considers a credit valuation adjustment to reflect nonperformance risk of both the Company and the single counterparty. The fair value of the interest rate contract has been determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. The interest rate swap is classified as a Level 2 item within the fair value hierarchy. As of December 31, 2024, the Company determined that the fair value of the interest rate swap was approximately $0.2 million and is recognized in other assets on the Company's consolidated balance sheets. For the years ended December 31, 2024, 2023 and 2022, the Company recognized gain of less than $0.1 million, a loss of $0.1 million and a gain of $0.3 million, respectively, on its consolidated statements of operations associated with the change in fair value of the interest rate swap arrangement.

Note 10 –Earning per Share

Earnings per Share

The Company calculates earnings per share in accordance with ASC Topic 260 -Earnings Per Share (“EPS”). Basic earnings per share of the Company’s common stock applicable to common stockholders is computed by dividing earnings applicable to common stockholders by the weighted-average number of shares of the Company’s common stock outstanding and assumed to be outstanding. Diluted EPS assumes the dilutive effect of outstanding common stock warrants, shares issued in conjunction with the Company’s ESPP (defined in Note 8 — Equity) and RSUs, all using the treasury stock method.

The following table sets forth the computation of the basic and diluted earnings per share attributable to the Company's common stockholders for the years ended December 31, 2024, 2023 and 2022:

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted income per share of the Company’s common stock:

(1)For the year ended December 31, 2022, certain market-based awards were not included in the computation of diluted income per common share because the market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

Note 11 –Income Taxes

The Company is taxed as a C Corporation.

Provision for Income Taxes

The Company’s provision for income taxes relating to continuing operations consists of the following:

The provision for income taxes for the years ended December 31, 2024, 2023 and 2022 resulted in effective tax rates on continuing operations of 22.7%,26.1%, and 29.2%, respectively. A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:

The Company is subject to taxation and files income tax returns in the U.S. federal jurisdiction and in various state jurisdictions. The Company’s 2021 and forward tax returns remain subject to examination by the U.S. federal taxing authorities. The Company’s 2020 and forward tax returns remain subject to examination by the various state taxing authorities.

Deferred Tax Assets (Liabilities)

The significant components of deferred tax assets (liabilities) were as follows:

In assessing the realizability of deferred tax assets, management considered whether it is more likely than not that some portion or all deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. In assessing the need for a valuation allowance, the Company considered both positive and negative evidence related to the likelihood of realization of the deferred tax assets. After giving consideration to these factors, management concluded that it was more likely than not that the deferred tax assets would be fully realized, and as a result, no valuation allowance against the deferred tax assets was deemed necessary at December 31, 2024 and 2023.

At December 31, 2024 and 2023, the Company hadno net operating loss carryforwards.

Liabilities for Uncertain Tax Positions

The Company hadno unrecognized tax benefits as of December 31, 2024 and 2023.

Note 12 –Operating Segments

As discussed in Note 1, the Company operates intwo segments (i) ODR, in which the Company provides maintenance or service primarily on mechanical, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers, and (ii) GCR, in which the Company generally manages new construction or renovation projects that involve primarily mechanical, plumbing, or electrical services awarded to the Company by general contractors or construction managers. Segment information is prepared on the same basis that the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its President and Chief Executive Officer and Executive Vice President and Chief Financial Officer.

In accordance with ASC Topic 280 –Segment Reporting, the Company has elected to aggregate all of the ODR work performed at branches intoone ODR reportable segment and all of the GCR work performed at branches intoone GCR reportable segment. All transactions between segments are eliminated in consolidation.

All of the Company’s identifiable assets are located in the United States, which is where the Company is domiciled. The Company does not have sales outside of the United States. For the years ended December 31, 2024 and 2023, no ODR or GCR segment customers accounted for 10% or more of the Company’s consolidated total revenue. For the year ended December 31, 2022, no ODR-related segment customers accounted for 10% or more of the Company’s consolidated total revenue and one GCR segment customer accounted for approximately 11% of consolidated total revenue.

Consolidated segment information for the periods presented is as follows:

(1)Included within selling, general and administrative expenses was $5.8 million, $4.9 million and $2.7 million of stock-based compensation expense for the years ended December 31, 2024, 2023 and 2022, respectively.

The Company does not identify capital expenditures and total assets by segment in its internal financial reports due in part to the shared use of a centralized fleet of vehicles and specialized equipment.

Note 13 –Commitments and Contingencies

Legal. The Company is continually engaged in administrative proceedings, arbitrations, and litigation with owners, general contractors, suppliers, employees, former employees and other unrelated parties, all arising in the ordinary courses of business. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the consolidated financial statements. In the opinion of the Company’s management, the current belief is that the results of these actions will not have a material adverse effect on the financial position, results of operations, or cash flows of the Company.

Surety. The terms of its construction contracts frequently require that the Company obtain from surety companies, and provide to its customers, payment and performance bonds (“Surety Bonds”) as a condition to the award of such contracts. The Surety Bonds secure the Company’s payment and performance obligations under such contracts, and the Company has agreed to indemnify the surety companies for amounts, if any, paid by them in respect of Surety Bonds issued on its behalf. In addition, at the request of labor unions representing certain of the Company's employees, Surety Bonds are sometimes provided to secure obligations for wages and benefits payable to or for such employees. Public sector contracts require Surety Bonds more frequently than private sector contracts, and accordingly, the Company's bonding requirements typically increase as the amount of public sector work increases. As of December 31, 2024, the Company had approximately $109.3 million in surety bonds outstanding. The Surety Bonds are issued by surety companies in return for premiums, which vary depending on the size and type of bond.

Collective Bargaining Agreements. Many of the Company’s craft labor employees are covered by collective bargaining agreements. The agreements require the Company to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If the Company withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the Company could incur additional liabilities related to these plans. Although the Company has been informed that some of the multi-employer pension plans to which it contributes have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

Self-insurance. The Company is substantially self-insured for workers’ compensation and general liability claims, in the view of the relatively high per-incident deductibles the Company absorbs under its insurance arrangements for these risks. The Company purchases workers’ compensation and general liability insurance under policies with per-incident deductibles of $250,000 per occurrence and a $3.9 million maximum aggregate deductible loss limit per year. Losses incurred over primary policy limits are covered by umbrella and excess policies up to specified limits with multiple excess insurers. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as current and non-current liabilities. The liability is determined by establishing a reserve for each reported claim on a case-by-case basis based on the nature of the claim and historical loss experience for similar claims plus an allowance for the cost of incurred but not reported claims. The current portion of the liability is included in accrued expenses and other current liabilities on the consolidated balance sheets. The non-current portion of the liability is included in other long-term liabilities on the consolidated balance sheets.

The Company is self-insured related to medical and dental claims under policies with annual per-claimant and annual aggregate stop-loss limits. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as a current liability in accrued expenses and other current liabilities.

The components of the self-insurance liability as of December 31, 2024 and 2023 are as follows:

The restricted cash balance represents an imprest cash balance set aside for the funding of workers' compensation and general liability insurance claims. This amount is replenished either when depleted or at the beginning of each month.

Note 14 -Leases

The Company leases real estate, vehicles and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the consolidated balance sheets. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically includeone or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For the Company’s leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with the Company’s real estate leases, the Company uses quoted borrowing rates on its secured debt.

Related Party Lease Agreements. In conjunction with the closing of the Jake Marshall Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of JMLLC who became a full-time employee of the Company. The lease term isten years and includes an option to extend the lease fortwo successive periods oftwo years each through November 2035. Base rent for the term of the lease is $37,500 per month for the first five years with payment commencing on January 1, 2022. The fixed rent payment is escalated to $45,000 per month for years six through 10 of the lease term. Fixed rent payments for the extension term are increased from $45,000 by the percentage increase, if any, in the consumer price index from the lease commencement date. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

In conjunction with the closing of the ACME Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of ACME who became a full-time employee of the Company. The lease term of the lease runs through December 31, 2024 and includes an option to extend the lease forone successive period ofone year through December 2025. Base rent for the term of the lease is $17,000 per month for the firstsix months with payment commencing on July 1, 2023. The fixed rent payment is escalated to $18,000 per month for the twelve month period ending December 31, 2024. Fixed rent payments for the extension term are increased to $19,000. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

In conjunction with the closing of the Industrial Air Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of Industrial Air who became a full-time employee of the Company. The lease term of the lease runs through August 31, 2026 and includes an option to extend the lease fortwo successive periods ofthree years each through August 2032. Base rent for the term of the lease is $26,500 per month for the first thirty-three months with payment commencing on November 1, 2023. The fixed rent payment is escalated to $27,563 per month for the first three year extension period ending August 31, 2029 and to $28,941 per month for the second three year extension period ending on August 31, 2032. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

Southern California Sublease. In June 2021, the Company entered into a sublease agreement with a third party for the entire ground floor of its leased space in Southern California, consisting of 71,787 square feet. Under the terms of the sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.6 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The initial lease term commenced in September 2021 and continues through April 30, 2027. As of December 31, 2024, the Company remains obligated under the original lease for such office space and, in the event the sublessee of such office space fails to satisfy its obligations under the sublease, the Company would be required to satisfy its obligations directly to the landlord under such original lease.

In addition, during the first quarter of 2022, the Company entered into an amendment to the aforementioned sublease agreement, which, among other things, expanded the sublease premises to include the entire second floor of its leased space in Southern California, consisting of 16,720 square feet. Under the terms of the amended sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.8 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The amended sublease term commenced in March 2022 and continues through April 30, 2027. For the years ended December 31, 2024, 2023 and 2022, the Company recorded $1.2 million, $1.2 million and $1.1 million of income inselling, general and administrative expenses related to this sublease agreement.

The following table summarizes the lease amounts included in the Company’s consolidated balance sheets as of December 31, 2024 and 2023:

(1) Operating lease assets are recorded net of accumulated amortization of $14.1 million and $13.6 million at December 31, 2024 and 2023, respectively.

(2) Includes approximately $0.9 million and $1.0 million at December 31, 2024 and 2023, respectively, related to a below-market lease recognized as a result of the Industrial Air Transaction, which was recorded as an increase to the Company’s operating lease right-of-use assets on its consolidated balance sheet. The below-market lease will be amortized to amortization expense over the remaining lease term.

(3) Finance lease vehicle assets are recorded net of accumulated amortization of $5.0 million and $4.5 million at December 31, 2024 and 2023, respectively.

(4) Includes approximately $2.4 million of net property assets associated with the Company's Pontiac Facility at both December 31, 2024 and 2023.

(5) Includes approximately $5.4 million associated with the Company's sale and leaseback financing transaction at both December 31, 2024 and 2023. See Note 7 — Debt for further detail.

The following table summarizes the lease costs included in the Company’s consolidated statements of operations for the years ended December 31, 2024, 2023 and 2022:

(1) Operating lease costs recorded in cost of revenue includes $0.4 million, $0.4 million and $0.5 million of variable lease costs for the years ended December 31, 2024, 2023 and 2022 respectively. In addition, $0.4 million of variable lease costs are included in selling, general and administrative expenses for the year ended December 31, 2024 and $0.5 million for each of the years ended December 31, 2023 and 2022, respectively. These variable costs consist of the Company’s proportionate share of operating expenses, real estate taxes and utilities.

(2) Finance lease costs recorded in cost of revenue includes $4.0 million, $3.7 million and $3.8 million of variable leases costs for the years ended December 31, 2024, 2023, and 2022 respectively. These variable lease costs consist of fuel, maintenance, and sales tax charges.

The future undiscounted minimum finance lease payments, as reconciled to the discounted minimum lease obligation indicated on the Company’s consolidated balance sheets within current and long-term debt, less interest, and under current and long-term operating leases, less imputed interest, as of December 31, 2024 were as follows (in thousands):

(1) Associated with the aforementioned related party leases entered into with former members of JMLLC, ACME and Industrial Air.

(2) Associated with the aforementioned third party sublease.

(3) The financing component for finance lease obligations represents the interest component of finance leases that will be recognized as interest expense in future periods. The financing component for operating lease obligations represents the effect of discounting the lease payments to their present value.

The following is a summary of the lease terms and discount rates as of:

(1) Excludes the weighted average lease term and weighted average discount rate associated with the aforementioned sale-leaseback financing transaction, which has a Primary Term of 25 years and utilized an implicit rate of 11.11%. See Note 7 – Debt for further detail.

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

Note 15 –Retirement Plan

The Company maintains a 401(k) plan for eligible, participating employees. The Company contributes an amount equal to 100% of an employee’s salary reduction contributions up to 4% of such employee’s compensation in a given year, as defined by the plan and subject to IRS limitations. The Company’s mandatory contributions were $2.8 million for the year ended December 31, 2024, as compared to $2.6 million and $2.4 million for the years ended December 31, 2023 and 2022, respectively. The Company may make a discretionary profit sharing contribution to the 401(k) plan in accordance with plan provisions. The Company has full discretion to determine whether to make such a contribution, and the amount of such contribution. In order to share in the profit sharing contribution, employees must have satisfied the 401(k) Plan’s eligibility requirements and be employed on the last day of the year. Employees are not required to contribute any money to the 401(k) Plan in order to qualify for the Company profit sharing contribution. Any discretionary profit sharing contribution would be divided among participants eligible to share in the contribution for the year in the same proportion that the participant’s pay bears to the total pay of all participants. This means the amount allocated to each eligible participant’s account would, as a percentage of pay, be the same. No discretionary profit sharing contributions were made for the years ended December 31, 2024, 2023 or 2022.

Note 16 –Multiemployer Pension Plans

The Company participates in approximately 50 multiemployer pension plans (“MEPPs”) that provide pension benefits to certain union employees in accordance with various collective bargaining agreements (“CBAs”). As of December 31, 2024, approximately 45% of the Company’s employees are members of collective bargaining units. As one of many employers who are obligated to contribute to these MEPPs, the Company is responsible with the other participating employers for any unfunded pension liabilities. The Company’s contributions to a particular MEPP are established by the applicable CBAs; however, the Company’s required contributions to a MEPP may increase based on the funded status of the individual MEPP and the legal requirements of the Pension Protection Act of 2006 (the “PPA”), which requires substantially underfunded MEPPs to implement a funding improvement plan (“FIP”) or a rehabilitation plan (“RP”) to improve their funded status. Factors that could impact the funded status of a MEPP include, without limitation, investment performance, changes in participant demographics, a decline in the number of actively employed covered employees, a decline in the number of contributing employers, changes in actuarial assumptions and the utilization of extended amortization provisions. If a contributing employer stops contributing to a MEPP, the unfunded obligations of the MEPP may be borne by the remaining contributing employers. Assets contributed to an individual MEPP are pooled with contributions made by other contributing employers; the pooled assets will be used to provide benefits to the Company’s employees and the employees of the other contributing employers.

A FIP or RP requires a particular MEPP to adopt measures to correct its underfunded status. These measures may include, but are not limited to an increase in a contributing employer’s contribution rate, or changes to the benefits paid to retirees. In addition, the PPA requires that a 5% surcharge be levied on employer contributions for the first year commencing shortly after the date the employer receives notice that the MEPP is in critical status and a 10% surcharge on each succeeding year until a CBA is in place with terms and conditions consistent with the RP.

If a MEPP has unfunded pension liabilities, the Company could be obligated to make additional payments to a MEPP if the Company either ceases to have an obligation to contribute to the MEPP under a CBA or significantly reduces the Company’s contributions to the MEPP because they reduce the number of employees who are covered by the relevant MEPP for various reasons, including, but not limited to, layoffs or closure of a subsidiary. The amount of such payments (known as a complete or partial withdrawal liability) would equal the Company’s proportionate share of the MEPPs unfunded vested benefits. Based on the information available to the Company from the MEPPs, the Company believes that some of the MEPPs to which they contribute are underfunded and are in “critical” or “endangered” status as those terms are defined by the PPA. Due to uncertainty regarding future factors that could trigger withdrawal liability, as well as the absence of specific information regarding the MEPPs’ current financial situation, the Company is unable to determine (a) the amount and timing of any future withdrawal liability, if any, and (b) whether the Company’s participation in these MEPPs could have a material adverse impact on its financial condition, results of operations or liquidity.

The nature and diversity of the Company’s business may result in volatility of the amount of contributions to a particular MEPP for any given period. That is because, in any given market, the Company could be working on a significant project and/or projects, which could result in an increase in the direct labor force and a corresponding increase in contributions to the MEPP(s) dictated by the applicable CBA. When that particular project(s) finishes and is not replaced, the level of direct labor would also decrease, as would the level of contributions to the particular MEPP(s). Additionally, the level of contributions to a particular MEPP could also be affected by the terms of the CBA, which could require at a particular time, an increase in the contribution rate and/or surcharges.

Total contributions to the various union construction industry MEPP, welfare, training and other benefits programs in accordance with the CBAs were $28.2 million for the year ended December 31, 2024, as compared to $31.8 million and $31.3 million for the years ended December 31, 2023 and 2022, respectively. Of these amounts, total contributions to MEPPs accounted for $10.3 million, $11.6 million and $12.6 million for the years ended December 31, 2024, 2023 and 2022, respectively.

The following table presents the MEPPs in which the Company participates. Additionally, this table also lists the PPA Zone Status for MEPPs as the critical status (red zone-less than 65% funded), the endangered status (yellow-less than 80% funded), the seriously endangered status (orange-less than 80% funded and projects a credit balance deficit within seven years) or neither critical or endangered status (green-greater than 80% funded). The zone status represents the most recent available information for the respective MEPP, which in certain circumstances is 2023 for the 2024 year. These dates may not correspond with the Company’s calendar year contributions. The zone status is based on information received from the MEPPs and is certified by the MEPPs’ actuaries. The “FIP/RP Status” column indicates MEPPs for which a financial improvement plan (FIP) or rehabilitation plan (RP) has been adopted or implemented.

(1)This information was obtained from the respective plan’s Form 5500 (“Forms”) for the most current available filing. These dates may not correspond with the Company’s fiscal year contributions. The above-noted percentages of contributions are based upon disclosures contained in the plans’ Forms. Those Forms, among other things, disclose the names of individual participating employers whose annual contributions account for more than 5% of the aggregate annual amount contributed by all participating employers for a plan year. Accordingly, if the annual contribution of two or more of the Company’s subsidiaries each accounted for less than 5% of such contributions, but in the aggregate accounted for in excess of 5% of such contributions, that greater percentage is not available and accordingly is not disclosed.

(2) Funding status based off of the prior year funding notice as the current year’s funding notice was not available prior to the filing of this Annual Report on Form 10-K.

(3)In February 2022, the Company announced its strategic decision to wind down its Southern California operations and executed the closeout phases on its remaining business unit projects during 2023. As such, these CBAs were not renewed.

Note 17 –Management Incentive Plans

The Company initially adopted the Omnibus Incentive Plan on July 20, 2016 for the purpose of: (a) encouraging the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) giving participants an incentive for excellence in individual performance; (c) promoting teamwork among participants; and (d) giving the Company a significant advantage in attracting and retaining key employees, directors and consultants. To accomplish such purposes, the Omnibus Incentive Plan, and such subsequent amendments to the Omnibus Incentive Plan, provides that the Company may grant options, stock appreciation rights, restricted shares, RSUs, performance-based awards (including performance-based restricted shares and restricted stock units), other share based awards, other cash-based awards or any combination of the foregoing.

Following the approval of the 2023 Amended and Restated Omnibus Incentive Plan, the Company has reserved 3,050,000 shares of its common stock for issuance. The number of shares issued or reserved pursuant to the Omnibus Incentive Plan will be adjusted by the plan administrator, as they deem appropriate and equitable, as a result of stock splits, stock dividends, and similar changes in the Company’s common stock. In connection with the grant of an award, the plan administrator may provide for the treatment of such award in the event of a change in control. All awards are made in the form of shares only.

Service-Based Awards

The Company grants service-based stock awards in the form of RSUs. Service-based RSUs granted to executives and employees vest ratably, on an annual basis, over three years. Service-based RSUs granted to non-employee directors vest ratably overone year. The grant date fair value of the service-based awards was equal to the closing market price of the Company’s common stock on the date of grant. For the years ended December 31, 2024, 2023 and 2022, the Company recognized $2.1 million, $1.5 million and $1.6 million of stock-based compensation expense related to outstanding service-based RSUs, respectively.

The following table summarizes the Company’s service-based RSU activity:

Performance-Based Awards

The Company grants performance-based restricted stock units (“PRSUs”) to executives, employees and former executives under which shares of the Company’s common stock may be earned based on the Company’s performance compared to defined metrics. The number of shares earned under a performance award may vary from zero to 150% of the target shares awarded, based upon the Company’s performance compared to the metrics. The metrics used for the grant are determined by the Company’s Compensation Committee of the Board of Directors and are based on internal measures such as the achievement of certain predetermined adjusted EBITDA and EBITDA margin performance goals generally over athree-year period.

The Company recognizes stock-based compensation expense for these awards over the vesting period based on the projected probability of achievement of the performance conditions as of the end of each reporting period during the performance period and may periodically adjust the recognition of such expense, as necessary, in response to any changes in the Company’s forecasts with respect to the performance conditions. For the years ended December 31, 2024, 2023 and 2022, the Company recognized $3.6 million and $3.4 million and $1.2 million, respectively, of stock-based compensation expense related to outstanding PRSUs.

The following table summarizes the Company’s PRSU activity:

(1) Performance-based awards covering the three year period ended December 31, 2022 were paid out in the first quarter of 2023 based on the approval of the Company's Compensation Committee. The performance factor during the measurement period used to determine compensation payouts was 136.13% of the pre-defined metric target of 100%, which resulted in a positive performance factor adjustment and the issuance of 32,327 of additional awards associated with the original grant.

(2) Performance-based awards covering the three-year period ended December 31, 2023 were paid out in the first quarter of 2024 based on the approval of the Company's Compensation Committee. The performance factor during the measurement period used to determine compensation payouts was 134.3% of the pre-defined metric target of 100%, which resulted in a positive performance factor adjustment and the issuance of 54,067 shares of the Company's common stock as additional awards associated with the original grant.

Stock-Based Compensation Expense

Total recognized stock-based compensation expense amounted to $5.8 million, $4.9 million and $2.7 million for the years ended December 31, 2024, 2023 and 2022, respectively. The aggregate fair value as of the vest date of RSUs that vested during the years ended December 31, 2024, 2023 and 2022 was $16.9 million, $3.8 million and $1.3 million, respectively. Total unrecognized stock-based compensation expense related to unvested RSUs which are probable of vesting amounted to $4.9 million at December 31, 2024. These costs are expected to be recognized over a weighted average period of 1.69 years.