Emcor Group, Inc,
Fiscal Year 2024.

Impact of Acquisitions In order to provide a more meaningful period-over-period discussion of our operating results, we may discuss amounts generated or incurred (revenues, gross profit, selling, general and administrative expenses, and operating income) from companies acquired. The amounts discussed reflect the acquired companies' operating results in the current reported period only for the time period these entities were not owned by EMCOR in the comparable prior reported period. For further discussion regarding our acquisitions, refer to Note 4 - Acquisitions of Businesses of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data. During 2024, we acquired seven companies for upfront consideration of $231.1 million, inclusive of customary working capital adjustments. These acquisitions are comprised of: (a) an electrical contractor in the Southeast region of the United States, that has been included in our United States electrical construction and facilities services segment, (b) two companies that have been included within our United States mechanical construction and facilities services segment, including: (i) a leading plumbing services provider in the Southeast region of the United States and (ii) a full service provider of mechanical construction and maintenance services in Central Texas, (c) three companies that have been included in our United States building services segment, including: (i) a provider of building automation and controls solutions in the Northeast region of the United States, (ii) a mechanical services company in the Western region of the United States, and (iii) a mechanical services company in the Eastern region of the United States, and (d) an instrumentation and electrical contractor, that has been included in our United States industrial services segment, which provides electrical, automation, digital integration, and fabrication services to various energy sector and process equipment customers. During 2023, we acquired eight companies for total consideration of $99.6 million. Such acquisitions include: (a) a national energy efficiency specialty services firm, the results of operations of which have been included in our United States building services segment, and (b) seven companies, the results of operations of which were de minimis, consisting of: (i) three companies that have been included within our United States mechanical construction and facilities services segment, one of which provides mechanical and pipe fabrication services in the Midwestern region of the United States, and two of which add capabilities to our national fire protection services, and (ii) four mechanical services companies in the Western and Midwestern regions of the United States that have been included within our United States building services segment and enhance our presence in geographies where we have existing operations. During 2022, we acquired six companies for total consideration of $100.8 million. Such acquisitions include: (a) a company that provides electrical construction services in the Greater Boston area, the results of operations of which have been included in our United States electrical construction and facilities services segment, and (b) five companies that enhance our presence in geographies where we have existing operations, the results of operations of which were de minimis, consisting of: (i) two companies that provide fire protection services in the Northeastern and Southern regions of the United States, respectively, and that have been included within our United States mechanical construction and facilities services segment, (ii) two companies that specialize in either building automation and controls or mechanical services in the Southwestern and Southern regions of the United States, respectively, and that have been included within our United States building services segment, and (iii) a company that provides electrical construction services in the Midwestern region of the United States and that has been included within our United States electrical construction and facilities services segment.

Refer to the operating income section below for further discussion regarding the operating performance of each of our reportable segments. Selling, general and administrative expenses The following table presents selling, general and administrative expenses ("SG&A") and selling, general and administrative expenses as a percentage of revenues ("SG&A margin") for the years ended December 31, 2023 and 2022 (in thousands, except for percentages):

20232022 Selling, general and administrative expenses$1,211,233 $1,038,717 SG&A margin9.6 %9.4 % Our selling, general and administrative expenses for the year ended December 31, 2023 were $1,211.2 million, or 9.6% of revenues, compared to selling, general and administrative expenses of $1,038.7 million, or 9.4% of revenues, for the year ended December 31, 2022. For the year ended December 31, 2023, selling, general and administrative expenses included $17.3 million of incremental expenses directly related to companies acquired in 2023 and 2022, including amortization expense attributable to identifiable intangible assets of $4.6 million. Excluding incremental expenses from businesses acquired, the increase in selling, general and administrative expenses, and SG&A margin, was predominantly attributable to increases in incentive compensation expense across the majority of our reportable segments, due to higher operating results than in the prior year, and salaries and related employment expenses, largely as a result of additional headcount to support our organic revenue growth as well as annual cost of living adjustments. In addition to these increases in employment costs, our SG&A for 2023 included incremental: (a) computer hardware and software costs, as a result of various information technology and cybersecurity initiatives currently in process, (b) travel and entertainment expenses, and (c) rent and other occupancy costs driven by: (i) the expansion or addition of certain fabrication facilities, which support our operations, and (ii) the impact of inflation on the real estate market. 26

Increase (decrease) in cash, cash equivalents, and restricted cash $332,682 $(365,500) During the year ended December 31, 2023, our cash balance, including cash equivalents and restricted cash, increased by $332.7 million from $457.1 million at December 31, 2022 to $789.8 million at December 31, 2023. Changes in our cash position from December 31, 2022 to December 31, 2023 are described in further detail below. For a discussion of the changes in our cash position from December 31, 2021 to December 31, 2022, refer to the Liquidity and Capital Resources section included in Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations of our Form 10-K for the year ended December 31, 2022. Operating Activities - Operating cash flows generally represent our net income as adjusted for certain non-cash items and changes in assets and liabilities. For 2023, net cash provided by operating activities was approximately $899.7 million compared to approximately $497.9 million of net cash provided by operating activities in 2022. The $401.7 million increase in operating cash flows during 2023, when compared to 2022, was largely a result of increased income, coupled with customer deposits and advanced payments on certain construction contracts, as evidenced by the growth in our contract liabilities. 30 Investing Activities - Investing cash flows consist primarily of payments for the acquisition of businesses, capital expenditures, and proceeds from the sale or disposal of property, plant, and equipment. During 2023, we utilized approximately $161.3 million of cash for investing activities compared to $140.8 million during 2022. The increase in investing cash outflows year-over-year was primarily driven by higher capital expenditures to support our organic growth, partially offset by an increase in proceeds from the sale or disposal of property, plant, and equipment. Payments for the acquisition of businesses were fairly consistent each year as we utilized $96.5 million in 2023, compared to $98.7 million in 2022. Financing Activities - Financing cash flows consist primarily of the issuance and repayment of short-term and long-term debt, repurchases of common stock, payments of dividends to stockholders, and the issuance of common stock through certain equity plans. Net cash used in financing activities during 2023 was $412.1 million compared to $710.1 million during 2022. The $298.1 million reduction in financing cash outflows was primarily due to a decrease in funds used for the repurchase of our common stock during 2023, partially offset by an increase in net repayments of debt under our credit agreement. The timing of common stock repurchases is at management's discretion subject to securities laws and other legal requirements and depends upon several factors, including market and business conditions, current and anticipated future liquidity, share price, and share availability, among others. For additional detail regarding our share repurchase program, refer to Note 12 - Common Stock of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data. We currently pay a regular quarterly dividend of $0.18 per share. For the years ended December 31, 2023 and 2022, cash payments related to dividends were $32.7 million and $27.2 million, respectively. Subsequent to December 31, 2023, our Board of Directors announced its intention to increase the regular quarterly dividend to $0.25 per share commencing with the dividend to be paid in April 2024. Our credit agreement places limitations on the payment of dividends on our common stock. However, we do not believe that the terms of such agreement currently materially limit our ability to pay such quarterly dividends for the foreseeable future. Effect of Exchange Rate Changes on Cash, Cash Equivalents, and Restricted Cash - We are exposed to fluctuations in foreign currency exchange rates, almost entirely with respect to the British pound. Therefore, the $18.9 million variance between the years ended December 31, 2023 and 2022 was a direct result of favorable exchange rate movements for the British pound versus the United States dollar.

10,864 13,679 2,264 United States building services 5,658 1,261 - Total impact $29,057 $48,403 $6,891 During the year ended December 31, 2023, we recognized revenue of approximately $16.5 million on individual projects that were substantially complete in prior periods but had revisions to total estimated cost or anticipated contract value, which resulted in an increase to profitability in excess of $1.0 million. Of this amount, approximately $3.4 million was reported within our United States electrical construction and facilities services segment and approximately $13.1 million was reported within our United States mechanical construction and facilities services segment. There were no significant amounts of revenue recognized during the years ended December 31, 2022 or 2021 related to performance obligations satisfied in prior periods. Due to the significant judgments utilized in the estimation process described above, if subsequent actual results and/or updated assumptions, estimates, or projections related to our underlying project positions were to change from those utilized at December 31, 2023, it could result in a material impact to our results of operations. For example, a 50 basis point increase or decrease in the estimated gross profit margin on our uncompleted construction projects, in the aggregate, as a result of a revision in estimated costs to complete a performance obligation or a revision in estimated transaction price, would have resulted in an increase or decrease to operating income of approximately $100 million for the year ended December 31, 2023. See Note 3 - Revenue from Contracts with Customers of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for further disclosure regarding revenue recognition.

Other Considerations As referenced above, impairment testing is based upon assumptions and estimates determined by management from a review of our operating results and business plans as well as forecasts of anticipated growth rates and margins, among other considerations. In addition, estimates of weighted average costs of capital are developed with the assistance of an independent third-party valuation specialist. These assumptions and estimates may change in future periods, especially in times of uncertain economic conditions and rising interest rates. Significant adverse changes to external market conditions or our internal forecasts, if any, could result in future impairment charges, particularly with respect to our United States industrial services segment given that the fair value of this reporting unit more closely approximates its carrying value. It is not possible at this time to determine if any future impairment charge will result or, if it does, whether such a charge would be material to our results of operations. Refer to Note 8 - Goodwill, Identifiable Intangible Assets, and Other Long-Lived Assets of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for further information about our goodwill and identifiable intangible assets as well as our impairment testing. No impairment of our goodwill, identifiable intangible assets, or other long-lived assets was recognized during the years ended December 31, 2022 or 2021.

Cost of sales and gross profit The following table presents cost of sales, gross profit (revenues less cost of sales), and gross profit as a percentage of revenues ("gross profit margin") for the years ended December 31, 2024 and 2023 (in thousands, except for percentages):

Operating income (loss) The following table presents by segment our operating income (loss) and each segment's operating income (loss) as a percentage of such segment's revenues ("operating margin") for the years ended December 31, 2024 and 2023 (in thousands, except for percentages):

2024% ofSegmentRevenues 2023% ofSegmentRevenues Operating income (loss): United States electrical construction and facilities services$447,186 13.4 %$230,640 8.3 %

United States mechanical construction and facilities services799,613 12.5 %530,644 10.5 % United States building services176,720 5.7 %182,995 5.9 % United States industrial services44,213 3.5 %35,375 3.0 %

Other items Interest expense was $3.8 million and $17.2 million for the years ended December 31, 2024 and 2023, respectively. The year-over-year decrease in interest expense was a result of the repayment, in December of 2023, of all previously outstanding direct borrowings under our credit facility. Interest income was $35.4 million and $15.4 million for the years ended December 31, 2024 and 2023, respectively. The increase in annual interest income resulted from greater returns on our invested cash, due to an increase in our average daily invested cash balance. Our income tax provision for the year ended December 31, 2024 was $370.2 million, based on an income tax rate of 26.9%, compared to an income tax provision and an income tax rate of $239.5 million and 27.5%, respectively, for the year ended December 31, 2023. Refer to Note 11 - Income Taxes of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for further discussion regarding our income tax provision and effective income tax rate.

December 31, 2024% of TotalDecember 31, 2023% of Total Remaining performance obligations: United States electrical construction and facilities services$3,068,396 31 %$2,387,844 27 %

Cash Flows The following table presents a summary of our operating, investing, and financing cash flows (in thousands): 20242023 Net cash provided by operating activities$1,407,894 $899,655

Net cash used in investing activities$(299,284)$(161,291) Net cash used in financing activities$(555,365)$(412,054) Effect of exchange rate changes on cash, cash equivalents, and restricted cash$(2,600)$6,372

Material Cash Requirements from Contractual and Other Obligations As of December 31, 2024, our short-term and long-term material cash requirements for known contractual and other obligations were as follows: Outstanding Debt and Interest Payments - As of December 31, 2024, there were no direct borrowings outstanding under our revolving credit facility. Interest payments on any future borrowings will be determined based on prevailing interest rates at that time. Refer to Note 9 - Debt of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for further detail of our debt obligations, including our revolving credit facility. Operating and Finance Leases - In the normal course of business, we lease real estate, vehicles, and equipment under various arrangements which are classified as either operating or finance leases. Future payments for such leases, excluding leases with initial terms of one year or less, were $390.1 million at December 31, 2024, with $96.9 million payable within the next 12 months. Refer to Note 16 - Leases of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for further detail surrounding our lease obligations and the timing of expected future payments. Open Purchase Obligations - As of December 31, 2024, we had $2.33 billion of open purchase obligations, of which payments totaling approximately $2.01 billion are expected to become due within the next 12 months. These obligations represent open purchase orders to suppliers and subcontractors related to our construction and services contracts. These purchase orders are not reflected in the Consolidated Balance Sheets and are not expected to impact future liquidity as amounts should be recovered through customer billings. Insurance Obligations - As described in further detail in Note 2 - Summary of Significant Accounting Policies of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data, we have loss payment deductibles and/or self-insured retentions for certain insurance matters. As of December 31, 2024, our insurance liabilities, net of estimated recoveries, were $240.1 million. Of this net amount, approximately $41.6 million is estimated to be payable within the next 12 months. Due to many uncertainties inherent in resolving these matters, it is not practical to estimate these payments beyond such period. To the extent that the amount required to settle claims covered by insurance continues to increase, the cost of our insurance coverage, including premiums and deductibles, is likely to increase. Contingent Consideration Liabilities - We have incurred liabilities related to contingent consideration arrangements associated with certain acquisitions, payable in the event discrete performance objectives are achieved by the acquired businesses during designated post-acquisition periods. The aggregate amount of these liabilities can change due to additional business acquisitions, settlement of outstanding liabilities, changes in the fair value of amounts owed based on performance during such post-acquisition periods, and accretion in present value. As of December 31, 2024, the present value of expected future payments relating to these contingent consideration arrangements was $29.7 million. Of this amount, $20.4 million is estimated as being payable during 2025, with the remainder due pursuant to the terms of our contractual agreements, some of which extend into 2027. 30

In addition, material cash requirements for other potential obligations, for which we cannot reasonably estimate future payments, include the following: Legal Proceedings - We are involved in several legal proceedings in which damages and claims have been asserted against us. While litigation is subject to many uncertainties and the outcome of litigation is not predictable with assurance, we do not believe that any such matters will have a material adverse effect on our financial position, results of operations, or liquidity. Refer to Note 15 - Commitments and Contingencies of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for more information regarding legal proceedings. Multiemployer Benefit Plans - In addition to our Company sponsored benefit plans, we participate in certain multiemployer pension and other post-retirement plans. The cost of these plans is equal to the annual required contributions determined in accordance with the provisions of negotiated collective bargaining agreements. During 2024, 2023, and 2022, contributions made to these plans were $577.0 million, $502.3 million, and $449.9 million, respectively; however, our future contributions to the multiemployer plans are dependent upon a number of factors. Amounts of future contributions that we would be contractually obligated to make pursuant to these plans cannot be reasonably estimated. Refer to Note 14 - Retirement Plans of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for more information regarding multiemployer benefit plans.

We do not have any other material financial guarantees or off-balance sheet arrangements other than those disclosed herein. 31 Other Items To help mitigate the impacts of greenhouse gas emissions on climate change, EMCOR has established initial carbon-based fuel consumption and greenhouse gas emission reduction targets. Although to date we have not incurred any material costs or capital expenditures associated with achieving our targets, we could be required to expend amounts in future periods as we continue to work towards our goals. It is not possible, at this time, to estimate the impact that future costs and/or capital expenditures may have on our business, financial condition, results of operations, or liquidity.

Revenue Recognition from Contracts with Customers The Company recognizes revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services by applying the following five step model: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; (5) recognize revenue as performance obligations are satisfied. The nature of our contracts gives rise to several types of variable consideration, including pending change orders and claims; contract bonuses and incentive fees; and liquidated damages and penalties. We recognize revenue for such variable consideration when it is probable, in our 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. 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. Due to uncertainties inherent in the estimation process, as well as the significant judgment involved in determining variable consideration, it is possible that estimates of costs to complete a performance obligation, and/or our estimates of transaction prices, 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, or changes in the estimate of transaction prices, are recognized on a cumulative catch-up basis in the period in which the revisions to the estimates are made. Based on an evaluation of individual projects that were substantially complete in prior periods but had revisions to total estimated costs or anticipated contract value (inclusive of the settlement of previously outstanding change orders and claims) that resulted in an increase to profitability in excess of $1.0 million, we recognized revenue during the years ended December 31, 2024 and 2023, as summarized in the following table (in thousands):

Operating income$1,344,863 $875,756 Operating income as a percentage of revenues9.2 %7.0 % Net income attributable to EMCOR Group, Inc.$1,007,145 $632,994

202420232022 United States electrical construction and facilities services$27,977 $12,535 $33,463 United States mechanical construction and facilities services38,342 10,864 13,679

Identifiable Intangible Assets and Other Long-Lived Assets As of December 31, 2024 and 2023, net identifiable intangible assets (primarily consisting of our customer relationships, subsidiary trade names, developed technology/vendor network, and contract backlog) arising out of the acquisition of businesses were $648.2 million and $586.0 million, respectively. The determination of related estimated useful lives for identifiable intangible assets and whether those assets are impaired involves significant judgments based upon short- and long-term projections of future performance. These forecasts reflect assumptions regarding anticipated macroeconomic conditions as well as our ability to successfully integrate acquired businesses. Absent earlier indicators of impairment, we test for impairment of subsidiary trade names that are not subject to amortization on an annual basis (October 1). In addition, we review for impairment of identifiable intangible assets that are being amortized as well as other long-lived assets whenever facts and circumstances indicate that their carrying values may not be fully recoverable. 34 As of October 1, 2024, we performed our annual impairment testing of all subsidiary trade names that are not subject to amortization and determined that there was no impairment of these assets. In performing this impairment assessment, we considered the sensitivity of the reported amounts to the methods, assumptions, and estimates underlying our testing. For example, we performed sensitivity analyses and concluded that, individually, none of the following changes in estimates or assumptions would have significantly impacted the results of our testing or resulted in a material impairment of our subsidiary trade names: (a) a 50 basis point increase in the discount rate utilized in our testing, (b) a 50 basis point decline in the perpetual growth rate utilized in our testing, or (c) a 10% decrease in the estimated fair value of each trade name. With respect to identifiable intangible assets that are being amortized as well as other long-lived assets, we did not identify any circumstances indicating that their carrying values may not be fully recoverable and, therefore, no impairment testing was required for these assets during the year ended December 31, 2024. During 2023, we identified facts and circumstances that indicated the carrying values of certain long-lived assets within our United States mechanical construction and facilities services segment may not be fully recoverable, necessitating a comparison of their carrying values to the undiscounted pre-tax cash flows estimated to result from the use of such assets. As a result of this test, we determined that these assets were impaired, and recognized a $2.4 million impairment charge as calculated using a discounted cash flow model.

Discussion and Analysis of Results of Operations Revenues The following table presents our revenues for each of our operating segments and the approximate percentages that each segment's revenues were of total revenues for the years ended December 31, 2024 and 2023 (in thousands, except for percentages):

2024% of Total 2023% of Total Revenues from unrelated entities: United States electrical construction and facilities services$3,342,927 23 %$2,783,723 22 %

Regardless of economic or market conditions, investment decisions by our ultimate customers may vary by location or as a result of other factors like the availability of labor, relative construction costs, or competitive conditions in their industries. Because we are dependent on the timing and funding of new awards, we are therefore vulnerable to changes in our clients' markets and investment decisions. Our business may be adversely affected by significant reductions in government spending, delays or disruptions in the government appropriations process or the failure to fully fund or implement legislation such as the CHIPS and Science Act of 2022 and the Inflation Reduction Act. Some of our businesses derive a significant portion of their revenues from federal, state, and local governmental agencies. As a result, reduced or delayed spending by the federal government and/or state and local governments, potentially including the reduction or elimination of funding for projects or other benefits under relevant legislation, may have a material and adverse impact on our business, financial condition, results of operations, and cash flows. Significant reductions in spending aimed at reducing federal, state, or local budget deficits, the absence of a bipartisan agreement on the federal government's budget or raising the debt ceiling (and any disruption caused by a federal government shutdown as a result thereof), personnel reductions, elimination of government agencies or programs, the closure of government facilities and offices, or other changes in budget priorities could result in the deferral, delay, disruption, or cancellation of projects or contracts that we might otherwise have sought to perform. These potential events could impact the level of demand for our services and our ability to execute, complete, and receive compensation for our current contracts, or bid for and enter into new contracts with governmental agencies. Volatility in the prices or availability of certain materials and equipment used in our businesses and those of our customers, including as a result of inflation, supply chain disruptions, geopolitical instability, and protectionist trade measures, could adversely affect our businesses. We are exposed to market risk of increases in certain commodity prices of materials, such as copper and steel, which are used as components of supplies or materials utilized in our operations. We are also exposed to increases in energy prices, particularly as they relate to gasoline prices for our fleet of approximately 14,000 vehicles. While we believe we can increase our prices to adjust for some price increases in commodities, there can be no assurance that price increases of commodities, if they were to occur, would be recoverable. Further, the timing of our price increases may lag the timing of the underlying increases in commodity or material prices and our fixed price contracts generally do not allow us to adjust our prices. As a result, increases in material or fuel costs could reduce our profitability with respect to projects in progress. Additionally, we rely on third-party vendors and manufacturers to supply much of the materials and equipment necessary for our operations. Disruptions, shortages, or delays in the availability of such materials and equipment have and may continue to adversely impact our result of operations, cash flows, and reputation with our customers. For example, in recent years, we experienced supply chain delays, including long lead times for certain materials and equipment, as well as an escalation in material and fuel prices, to varying degrees. These disruptions resulted in declines in gross profit and gross profit margin for certain of our operations. Fluctuations in the price of energy and commodity materials, whether resulting from fluctuations in market supply or demand, geopolitical conditions (including supply chain disruptions, sanctions on Russian exports as a result of Russia's invasion of Ukraine, armed conflict between Israel and Iran, and shipping lane disruptions following maritime attacks in the Gulf of Aden and the Red Sea), an increase in trade protection measures such as tariffs, or the disruption, modification, or cancellation of multilateral trade agreements, may adversely affect our customers and as a result cause them to curtail the use of our services. On the other hand, because certain of our construction and service offerings are designed to improve energy efficiency in our clients' operations, or to assist in the generation of new sources of renewable energy, such as wind, solar, and geothermal generation, decreases in the costs of traditional energy sources such as oil and natural gas, including as a result of recessionary pressure and reduced demand, may lower our customers' demand for efficiency improvements and alternative energy sources, which could have an adverse effect on our financial position, results of operations, and cash flows. Changes in U.S. foreign trade policies, including as a result of the new presidential administration, could lead to the imposition of additional trade barriers and tariffs. We cannot predict the full extent of new, extended, or changed trade policies, including tariffs, that may be made by the current or a future presidential administration or Congress, including whether existing tariff policies will be maintained or modified or if changes in the U.S. trade policy could result in reactions from U.S. trading partners, such as adopting responsive trade policies making it more difficult or costly for us to purchase materials or supplies. These changes in U.S. trade policy or in laws and policies governing foreign trade, and any resulting negative sentiments towards the United States as a result of such changes, could have an adverse impact on our business, financial position, results of operations, and liquidity. 9

We recognize revenue for the majority of our construction projects based on estimates; therefore, variations of actual results from our assumptions may reduce our profitability. As discussed in further detail in the "Critical Accounting Policies and Estimates" section included in Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations, revenue is recognized as performance obligations are satisfied and earnings or losses recognized on individual contracts are based on estimates of contract price, costs, and profitability. Changes in estimates of transaction prices as well as estimated costs are recognized on a cumulative catch-up basis in the period in which the revisions to the estimates are made. Consequently, changes in estimates, or variations of actual results from previous projections, on an unusually large project, or on a number of average size projects, could be material and could have an adverse impact on our financial condition, results of operations, and cash flows. We are increasingly dependent on sophisticated information technology systems; our business and results of operations are subject to adverse impacts due to the disruption, failure, or breaches of these systems. We and our customers and third-party providers rely on information technology systems, hardware, and software, including third-party "cloud based" systems, to run critical accounting, project management, and financial information systems. We rely upon security measures, systems redundancy, and third-party products and services to attempt to secure our information technology systems and the confidential, proprietary, and sensitive information they contain. However, our information technology systems and data, and that of our customers and third-party providers, are subject to cybersecurity incidents, such as hacking, computer viruses or other malicious or destructive software, ransomware, denial of service attacks, malicious social engineering and other intrusions, encryption, erasure, failure, and damage by individuals (which may include our and our third-party providers' employees), groups or nation states or state-sponsored threats. Such cybersecurity incidents could result in operational disruption and information misappropriation, such as theft of intellectual property or inappropriate disclosure of customer data or confidential, sensitive, or personal information, or in reputational harm with customers. While we maintain insurance coverage for these types of cybersecurity incidents, such policies may not completely provide coverage for, or completely offset, the costs associated with such incidents, including losses from delays in our ability to provide services to our customers, reputational harm, or the costs to improve security against future similar threats. We are continuously developing and enhancing our controls, processes, and practices designed to protect our systems, computers, software, data, and networks from attack, damage, or unauthorized access. This continued development and enhancement requires us to expend additional resources. However, we may not anticipate or combat all types of potential disruptions or breaches. Threats are continually evolving and threat actors may adopt new or different means of breaching our information technology systems and data, including the potential use of artificial intelligence ("AI") tools to engage in automated, targeted, and coordinated attacks. As cybersecurity threats become more sophisticated and difficult to detect, our ability to promptly prevent, detect and mitigate the effects of cybersecurity incidents may be impacted, potentially resulting in more material adverse effects. As such threats increase in frequency and sophistication, we could be required to expend additional capital and other resources, including costs to deploy additional personnel and protection technologies, train employees, and engage third-party experts and consultants. Additionally, as many of our employees use our information technology systems to collaborate with colleagues in different geographic locations and access our systems and those of our customers remotely, we and our customers may be subject to heightened security risks, including the risks of cyber-attacks. For additional information on our strategy and processes for assessing, identifying, and managing the risks posed by cybersecurity threats, and the management and oversight of such efforts, refer to Part I, Item 1C. Cybersecurity. The proper functioning of our information technology systems could also be impacted by other causes and circumstances beyond our control, including malware embedded in third-party applications, the decision by software vendors to discontinue further development, integration, or long-term software maintenance support for our information systems, or hardware interruption, damage or disruption as a result of power outages, natural disasters, or computer network failures. Errors or other defects in the design or implementation of hardware or software applications by our employees or third-party providers could also disrupt our networks, information systems or data. System redundancy may be ineffective or inadequate, and the Company's disaster recovery and business continuity planning may not be sufficient to address all potential cybersecurity incidents or other disruptions. We may also utilize new information technology tools, including AI tools, in certain business functions, and such tools could be subject to malfunction, security vulnerabilities, or algorithmic flaws (including AI generation of false or biased information). Unsettled regulations and case law regarding the ownership of intellectual property generated or 13

Legal and Regulatory Risk Factors We are subject to many laws and regulations in the jurisdictions in which we operate; changes to such laws and regulations may result in additional costs and impact our operations. We are committed to upholding the highest standards of corporate governance and legal and ethical compliance. We are subject to many laws and regulations, including various laws and regulations that apply specifically to U.S. public companies. These include the rules and regulations of the New York Stock Exchange, the Sarbanes-Oxley Act of 2002, and the Dodd-Frank Wall Street Reform and Consumer Protection Act, as well as the various regulations, standards, and guidance put forth by the SEC and other federal and state governmental agencies to implement and enforce those laws. New laws, rules, and regulations, or changes to existing laws or their interpretations, could create added legal and compliance costs and uncertainty for us. In addition, our United Kingdom operations are subject to laws and regulations that are in some cases different from those of the United States, including labor laws such as the U.K. Modern Slavery Act and laws and regulations governing information collected from employees, customers and others, specifically the GDPR. These laws and regulations could increase the cost and complexity of doing business in the U.K. and negatively impact our financial position and results of operations. Our efforts to comply with evolving laws, regulations, and reporting standards may increase our general and administrative expenses, divert management time and attention, or limit our operational flexibility, all of which could have a material adverse effect on our business, financial position, and results of operations. Many of our non-public competitors and competitors operating solely in the U.S. are not subject to these laws and regulations and the related costs and expenses of compliance. Our failure to comply with environmental laws could result in significant liabilities. Our operations are subject to various laws, including environmental laws and regulations, among which many deal with the handling and disposal of hazardous or universal waste products, polychlorinated biphenyls, per- and polyfluoroalkyl substances, and fuel storage. A violation of such laws and regulations, or a release of or exposure to such substances, including mold, lead paint, and asbestos, has and may in the future, expose us to various claims, including claims by third parties, as well as remediation costs and fines. We own and lease many facilities. Some of these facilities contain hazardous materials, such as asbestos, and fuel storage tanks, which may be above or below ground. If there is a release of such hazardous materials, or these tanks were to leak, we could be responsible for the cost of remediation as well as potential fines. As a part of our business, we also install fuel storage tanks and are sometimes required to deal with hazardous materials, all of which may expose us to environmental liability. In addition, some of our operations, particularly those servicing oil and natural gas refineries, are subject to the risk of accidental release of hazardous materials that have in the past and have the potential to result in injuries or fatalities involving our employees or third parties, property damage, or environmental contamination. If our personnel cause or are alleged to have caused any such release, it may result in claims for indemnification under our contracts with customers, claims from third-parties or local communities impacted by such release, or investigations or regulatory action by federal, state or local environmental, occupational, health and safety or other authorities. These risks could result in a material adverse effect on our business, operating results, financial position, and cash flows, and in some cases, on our reputation or our ability to obtain projects from customers. New laws and regulations, stricter enforcement of existing laws and regulations, the discovery of previously unknown contamination or leaks, exposure to or the release of materials subsequently identified as hazardous by a governmental authority, the imposition of new clean-up requirements, or the exposure of our employees or other contractors to hazardous materials, could require us to incur significant costs or become the basis for new or increased liabilities that could harm our financial position and results of operations, although certain of these costs might be covered by insurance. In some instances, we have obtained indemnification or covenants from third parties (including predecessors or lessors) for such clean-up and other obligations and liabilities, and we believe such indemnities and covenants are adequate to cover such obligations and liabilities. However, such third-party indemnities or covenants may not cover all of such costs or third-party indemnitors may default on their obligations. In addition, unanticipated obligations or liabilities, or future obligations and liabilities, may have a material adverse effect on our business operations. Further, we cannot be certain that we will be able to identify, or be indemnified for, all potential environmental liabilities relating to any acquired business. See Note 15 - Commitments and Contingencies of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data, for more information regarding any significant legal proceedings in which we are involved.

Human Capital and Labor Risk Factors The departure, loss or incapacitation of key personnel could disrupt our business. We depend on the continued efforts of our senior management and other key employees. The departure or loss of key personnel, including as a result of illness or other incapacitation, or the inability to hire and retain qualified executives, could negatively impact our ability to manage our business, successfully execute for our customers or sustain valuable customer relationships. While we have established and regularly review management succession plans, the inadequacy of any such succession plans in addressing a particular loss or our failure to successfully implement such succession plans may adversely affect our business. 16 We may be unable to attract and retain skilled employees. Our ability to grow and maintain productivity and profitability will be limited by our ability to employ, train, and retain skilled personnel necessary to meet our requirements. We are dependent upon a workforce of approximately 40,400 employees, including our project managers and field supervisors who are responsible for managing our projects, and there can be no assurance that any individual will continue in his or her capacity for any particular period of time. The loss of such qualified employees could have an adverse effect on our business. We cannot be certain that we will be able to maintain an adequate skilled labor force necessary to operate efficiently and to support our business strategy or that labor expenses will not increase as a result of a shortage in the supply of these skilled personnel. We also rely on third-party subcontractors to complete portions of some of our projects and those subcontractors are subject to the same challenges and uncertainty in employing, training and retaining an adequate qualified labor force to meet our needs. The availability and costs to adequately train and maintain a skilled labor force could be impacted by factors we cannot control, including changes in the unemployment rate, prevailing wage rates, benefit costs, potential labor force disruptions, and competition for labor from our competitors in the markets we serve. Labor shortages or increased labor costs, such as those experienced in recent years throughout the United States and United Kingdom, could impair our ability to provide services to our customers (or the ability of third-party subcontractors to provide services to us), maintain our business, or grow our revenues. Recent rules by the Federal Trade Commission to eliminate almost all non-competition agreements with employees, or similar regulations, if found to be enforceable and implemented, may also impact retention of key employees by reducing barriers to individuals with such agreements leaving to work for our competitors. Our unionized workforce could adversely affect our operations; our participation in many multiemployer pension plans could result in substantial liabilities being incurred. As of December 31, 2024, approximately 63% of our employees were covered by collective bargaining agreements. However, only two of our collective bargaining agreements are national or regional in scope, and not all of our collective bargaining agreements expire at the same time. Although the majority of these agreements prohibit strikes and work stoppages, we cannot be certain that strikes or work stoppages will not occur in the future. Strikes or work stoppages likely would adversely impact our relationships with our customers and could have a material adverse effect on our financial position, results of operations, and cash flows. We contribute to approximately 200 multiemployer pension plans. Under the Employee Retirement Income Security Act, we may become liable for our proportionate share of a multiemployer pension plan's underfunding if we cease to contribute to that pension plan or significantly reduce the employees in respect of which we make contributions to that pension plan. Our potential liability for unfunded liabilities could be material. See Note 14 - Retirement Plans of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data for additional information regarding multiemployer pension plans.

General Risk Factors Public health emergencies, epidemics, or pandemics impact our business. The global spread of COVID-19, and the responses of governments, businesses, and individuals to combat it, caused significant volatility, uncertainty, and economic disruption, which adversely impacted our operations and those of our customers. A renewed significant spread of COVID-19, new variants thereof, or new infectious diseases, could lead to similar impacts. Government authorities in the United States and United Kingdom have at various times recommended or imposed certain social distancing, quarantine, and isolation measures to varying degrees, with many such measures impacting large portions of the population, including limitations on travel and mandatory cessation of certain business activities. Both the outbreak and the containment and mitigation measures resulted in serious adverse impacts on the economy, and it is possible that such measures could return for future public health emergencies. The impact to our business and operations in another public health emergency will depend in part on the severity and duration of those measures and the extent and pace of economic recovery, which are difficult to predict. Our workforce and operations were impacted by the COVID-19 pandemic. For example, we experienced disruptions that impacted our ability to perform our work. Such impacts included, but were not limited to, access restrictions and temporary job site shutdowns, reduced labor efficiency resulting from adherence to physical distancing, quarantine, and isolation requirements due to illness or exposure to an infected person, and other enhanced safety protocols mandated at the majority of our worksite locations, and the deferral of maintenance and service projects by our customers. The extent to which another epidemic, pandemic or public health emergency could impact our business and results of operations in the future remains highly uncertain and will be affected by a number of factors, which could have a material adverse effect on our business, financial condition, results of operations, and/or stock price. Additionally, public health emergencies may result in more of our employees accessing our systems remotely as a result of potential business or facility closures or reduced or staggered in-person attendance in response to such emergencies. This remote access may subject us to heightened security risks, including the risks of cyber-attacks. Further, if any of our key personnel are unable to perform their duties for a period of time, including as a result of illness, our results of operations could be adversely affected. 18 Terrorist attacks and other catastrophic events could disrupt our operations and services. Acts of terrorism and other catastrophic events, and the actions taken by the United States and/or other governments or actors in response to such events, may result in property damage, supply disruption, or economic dislocations throughout the country. Although it is not possible to predict such events or their consequences, these events could increase the volatility of our financial results due to decreased demand and unforeseen costs, with partial or no corresponding compensation from clients.

Economic and Strategic Risk Factors Economic downturns, recessions, or periods of slow growth have historically led to reductions in demand for our services. Negative conditions in the credit markets, including elevated interest rates, may adversely impact our results of operations and our ability to operate our business. The level of demand from our clients for our services has been, in the past, adversely impacted by slowdowns in the industries we service, as well as in the economy in general. When the general level of economic activity has declined from historical levels, certain of our ultimate customers have delayed or canceled projects or capital spending, especially with respect to more profitable private sector work, and such slowdowns adversely affect our ability to grow, reducing our revenues and profitability. A number of economic factors, including financing conditions, the prices of commodities, and energy prices, have, in the past, adversely affected the industries we serve and our ultimate customers' ability or willingness to fund expenditures. General concerns about the fundamental soundness of domestic and foreign economies may also cause ultimate customers to defer projects even if they have credit available to them. A prolonged stagnation or weakening in financial and macroeconomic conditions, potentially including higher interest rates, supply chain challenges, inflation, or geopolitical impacts, could therefore have a significant adverse effect on our revenues and profitability. We are exposed to market risk for changes in interest rates for any borrowings under our credit facility, which bear interest at variable rates. Although the Federal Reserve Board began to decrease the federal funds rate in 2024 after increases in 2022 and much of 2023, the pace and extent of additional decreases are uncertain. Increases in benchmark interest rates impact our interest expense and cost of capital, which may adversely impact our ability to make payments on future outstanding debt, raise funds through the issuance of debt, fund capital expenditures or meet other liquidity needs. Any of these impacts may adversely affect our liquidity, results of operations, and financial position. For further information on our credit facility and associated borrowing rates, refer to Note 9 - Debt of the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data. Many of our clients depend on the availability of credit to help finance their capital and maintenance projects. At times, tightened availability of credit or increased interest rates have negatively impacted the ability of existing and prospective ultimate customers to fund projects we might otherwise perform, particularly those in the more profitable private sector. As a result, our ultimate customers may defer such projects for an unknown, and perhaps lengthy, period. Any such deferrals would inhibit our growth and would adversely affect our results of operations. In a weak economic environment, particularly in a period of restrictive credit markets, we may experience greater difficulties in collecting payments from, and negotiating change orders and/or claims with, our clients due to, among other reasons, a diminution in our ultimate customers' access to the credit markets or potential bankruptcies. If clients delay in paying or fail to pay a significant amount of our outstanding receivables, or we fail to successfully negotiate a significant portion of our change orders and/or claims with clients, it could have an adverse effect on our liquidity, results of operations, and financial position. Our business has traditionally lagged recoveries in the general economy and, therefore, after an economic downtown we may not recover as quickly as the economy at large. Certain of our businesses, including those within our United States industrial services segment, are exposed to risks associated with the oil and gas industry. These risks, which are not subject to our control, include volatility in the price and production of crude oil, the development of and consumer demand for alternative energy sources, including as a result of a change in consumer preference, or in an effort to reduce greenhouse gas emissions or combat climate change, and legislative and regulatory actions. In addition, macroeconomic conditions, influenced by a variety of events and circumstances, can also affect customer demand for our services within these businesses and lower prices and production volumes, or perceived risk thereof, typically results in the curtailment or deferral of spending by our customers. While higher prices for our customers' products may increase demand for our services, significant increases in the price or demand for crude oil may also result in the short-term curtailment or deferral of spending by our customers, as facility downtime to perform certain of the services we provide comes at a higher opportunity cost. Volatility within these markets, including the impact of geopolitical instability (such as disruption of shipping lanes), could negatively impact our financial position, results of operations, and cash flows. Our business is vulnerable to the cyclical nature of the markets in which our clients operate and is dependent upon the timing and funding of new awards. We provide construction and maintenance services to ultimate customers operating in a number of markets which have been, and we expect will continue to be, cyclical and subject to significant fluctuations due to a variety of factors beyond our control, including economic conditions and changes in client spending.

We may be unable to achieve our current or future climate commitments and targets, or we may incur substantial costs in meeting such targets. To help mitigate the impacts of GHG emissions on climate change, EMCOR has established initial carbon-based fuel consumption and GHG emission reduction targets. However, achievement of such targets, or similar targets that may be established in the future, is subject to risks and uncertainties, many of which are outside of our control. These risks and uncertainties include, but are not limited to: (a) our ability to execute our operational strategies and achieve our goals within the currently projected costs and the expected timeframes; (b) the availability and cost of alternative fuels, electrical charging infrastructure, off-site renewable energy, and other materials and components; (c) unforeseen design, operational, and technological difficulties; (d) the outcome of research efforts and future technology developments, including alternate or more fuel efficient vehicles for our fleet, such as hybrid or electric vehicles, the availability of which has been impacted by the global shortage in supply of vehicles generally; (e) regulations and requirements that restrict or prohibit our ability to impose requirements on third-party contractors; (f) an acquisition of or merger with another company that has not adopted similar targets and goals or whose progress towards reaching its goals is not as advanced as ours; and (g) exogenous macroeconomic or supply chain shocks, which could result in fluctuations in our fuel consumption and GHG emissions in a given period. In addition, we could be required to expend amounts in future periods as we continue to work towards achieving our targets, which may have a material effect on our business, financial condition, results of operations, or liquidity. 18

Climate Change Related Risk Factors Climate change and related environmental issues could have a material adverse impact on our business, financial condition, and results of operations. Climate change related events, such as increased frequency and severity of storms, floods, wildfires, droughts, hurricanes, freezing conditions, and other natural disasters, may have an adverse impact on our business, financial condition, and results of operation. While we have invested in programs to mitigate the risk that these events disrupt our ability to serve our customers, and also maintain insurance coverage to offset the costs which could result, these events pose inherent risks regardless of where or how we conduct our business. For example, severe weather or a catastrophic natural disaster could 17 negatively impact our and our customers' offices, facilities, or job sites. Access to clean water and reliable energy where we conduct our business is also critical to our operations. Accordingly, severe weather events or natural disasters have the potential to disrupt our and our customers' businesses and may cause us to experience work stoppages, project delays or cancellations, financial losses, and additional costs to resume operations, in addition to potential adverse impacts on the health and safety of our workforce and their ability to work or travel. Further, climate change poses direct physical risks to infrastructure across the market sectors we serve, both as a result of chronic environmental changes, such as rising sea levels and temperatures, as well as acute events, such as hurricanes, droughts, and wildfires. These impacts, and the costs to address them, could result in fewer resources for strategic investment by our customers, which could result in a decrease in demand for certain of our services. Any of these events could have a material adverse impact on our business, financial condition, and results of operations. We may be affected by market or regulatory responses to climate change. Growing public concern about climate change has resulted in the increased focus of local, state, regional, national, and international regulatory bodies on greenhouse gas ("GHG") emissions and climate change issues. Legislation to regulate GHG emissions has periodically been introduced in the U.S. Congress, and there has been a wide-ranging policy debate, both in the United States and internationally, regarding the impact of these gases and possible means for their regulation. Several states in the United States have proposed or adopted laws that require reporting of GHG emissions, or that a percentage of our fleet be comprised of electric vehicles. Such laws or regulations enacted by the federal government or state and local governments or agencies, and/or any international agreements to which the United States may become a party that control or limit GHG emissions or otherwise seek to address climate change, could result in increased compliance costs for us and our clients or have other impacts on our clients, including those who are involved in the exploration, production, or refining of fossil fuels, or who emit greenhouse gases through the combustion of fossil fuels or through the mining, manufacture, utilization, or production of materials or goods. Such policy changes could increase the costs of projects for our clients or, in some cases, prevent a project from going forward, thereby potentially reducing the need for certain of our services, which could in turn have a material adverse effect on our business, financial condition, and results of operations. In addition, compliance with legislation requiring us to increase the mix of electric vehicles within our fleet will be difficult as the electric vehicles currently available do not meet our fleet requirements. However, policy changes and climate legislation could also increase the overall demand for our services as our clients and partners work to comply with these policies, such as by decarbonizing their industries, transitioning from fossil fuels to renewable energy sources, reducing their energy consumption, and developing integrated and sustainable solutions, all of which could have a positive impact on our business. We cannot predict with certainty what the effect of such regulation may be on us or our customers. In addition, in March 2024, the SEC finalized new rules that would require significant climate-related disclosures by public companies, including evaluation and disclosure of material climate-related risks and opportunities, GHG emissions inventory, climate-related targets and goals, and financial impacts of physical and transition risks. While these rules are currently stayed pending legal challenges, and may face additional challenges under the current administration, it is not certain whether they, or similar future rules, will go into effect. Other legislation, including certain state laws, have been passed that would require similar climate-related disclosure. To the extent that such new rules become effective, our legal, accounting, and other compliance expenses may increase and may divert management time and attention. We may also be exposed to legal or regulatory action or claims as a result of these new regulations. All of these risks could have a material adverse effect on our business, financial position, and/or stock price.

Our dependence upon fixed price contracts could adversely affect our business. We currently generate, and expect to continue to generate, a significant portion of our revenues from fixed price contracts. We must estimate the total costs of a particular project to bid for fixed price contracts. Cost and scheduling estimates are based on a number of assumptions, including those about future economic conditions, commodity and other materials pricing, cost and availability of labor, equipment, and materials, and supply chain efficiency, among other factors. The actual cost of labor and materials, however, may vary from the costs we originally estimated, something which we have experienced and may continue to experience due to inflationary pressures, supply chain challenges, and elevated interest rates. These variations, along with other risks, inherent in the execution of projects subject to fixed price contracts, may cause actual gross profits from projects to differ from those we originally estimated and could result in reduced profitability or losses on projects. Depending upon the size of a particular project, variations from the estimated contract costs can have a significant impact on our operating results for any fiscal quarter or year. 10 We could incur additional costs to cover certain guarantees or other contractual requirements. In some instances, we guarantee completion of a project by a specific date or price, cost savings, achievement of certain performance standards, or performance of our services at a certain standard of quality. For other arrangements, including those within our government services operations, the terms of our contracts may include provisions which require us to achieve certain minority participation or small or disadvantaged business "set-aside" goals. If we subsequently fail to meet such guarantees, or comply with such provisions, we may be held responsible for costs resulting from such failures, including payment of penalties or liquidated or other damages. To the extent that any of these events occur, the total costs of a project could exceed the original estimated costs, and we would experience reduced profits or, in some cases, a loss. Many of our contracts, especially our building and industrial services contracts, may be canceled or delayed on short notice, and we may be unsuccessful in replacing such contracts if they are canceled or as they are completed or expire. For example, in 2024 and 2023, our United States building services segment and our United Kingdom building services segment were unsuccessful in retaining certain contracts upon rebid. We could experience a decrease in revenues, net income, and liquidity if any of the following occur: •customers cancel a significant number of contracts or delay services or projects; •we fail to win a significant number of our existing contracts upon re-bid;

Failure to provide our services in accordance with professional standards or contractual requirements could expose us to significant monetary damages. Our services often involve professional judgments regarding the planning, design, development, construction, or operations and management of complex facilities. Although we have adopted a range of insurance, risk management, and risk avoidance programs designed to reduce potential liabilities, a catastrophic event at one of our project sites or a completed project, resulting from the services we have performed, could result in significant professional or product liability and warranty or other claims against us, as well as reputational harm. These liabilities could exceed our insurance limits or impact our ability to obtain insurance in the future. Further, even where insurance coverage applies, such policies have limits and deductibles or retentions, which could result in our assumption of exposure for certain amounts with respect to any claim filed against us. In addition, customers or subcontractors who have agreed to indemnify us against any such liabilities or losses might refuse or be unable to uphold their obligations to us, or we may be liable to our customers based on the terms of our contracts, which may require us to provide indemnification to them. An uninsured claim, either in part or in whole, as well as any claim covered by insurance but subject to a policy limit, high deductible/retention, or the denial of coverage by an insurance carrier, could have a material adverse effect on our business, financial condition, and results of operations. Our business strategy relies, in part, on acquisitions to sustain our growth, and these transactions present certain risk and uncertainties. As part of our growth strategy, we acquire companies that expand, complement, and/or diversify our businesses. However, there is no guarantee that we will be successful in identifying targets that meet our requirements for acquisition. We may also face increased competition from other potential acquirers who may have greater financial resources available to them or who may be in a position to offer more favorable terms to the target company. This competition may limit our ability to pursue acquisition opportunities. Additionally, circumstances beyond our control, such as elevated interest rates, inflation and potential macroeconomic disruptions, may hinder our ability to pursue and complete acquisitions. Further, realization of the anticipated benefits of an acquisition such as our acquisition of Miller Electric Company, and avoiding or mitigating the potential risks associated with an acquisition, will depend, among other things, upon our ability to: (a) effectively conduct due diligence to identify and mitigate potential problems at companies we propose to acquire, (b) recognize incompatibilities or other obstacles to the successful integration of the acquired business with our other operations, and (c) gain greater efficiencies and scale that will translate into reduced costs or anticipated synergies in a timely manner. However, there can be no assurance that an acquisition we may make in the future will provide the benefits anticipated when entering into the transaction. Acquisitions we have completed, and future acquisitions we may make, could expose us to operational challenges and risks, including the diversion of management's attention from our existing businesses, the failure to retain key personnel or customers of the acquired business, and the assumption of unknown liabilities of the acquired business for which there are inadequate reserves. While the former owners of an acquired company may agree as part of our purchase agreements to indemnify us against certain historical liabilities of the target company, such indemnification may be subject to time limits, deductibles, caps and exclusions, and such former owners might be unable or unwilling to uphold those obligations to us. Our ability to sustain our growth and maintain our competitive position may be affected by our ability to identify and acquire desirable businesses and successfully integrate any acquired business. In addition, while we work to rapidly implement or maintain internal controls and financial reporting standards and procedures in the businesses we acquire, including integrating such acquired businesses into our consolidated financial reporting systems and controls, we cannot be certain that such implementation and integration will be quickly and effectively completed. Our internal control processes and procedures with respect to such businesses may need to be adjusted or enhanced in order to ensure that such businesses are in compliance with the regulations we are subject to as well as our internal policies and standards. Such changes could result in significant additional costs to us and could require the diversion of management's attention from our existing businesses or other strategic initiatives. 12 Amounts included in our remaining performance obligations may not result in actual revenues or translate into profits. Many contracts are subject to cancellation or suspension on short notice at the discretion of the client, and the contracts in our remaining performance obligations are subject to changes in the scope of services to be provided as well as adjustments to the costs relating to the contract. The risk of contracts included in our remaining performance obligations being delayed or canceled generally increases during economic slowdowns, periods of restrictive credit markets, or in response to significant fluctuations in commodity prices. Accordingly, there is no assurance that revenue from remaining performance obligations will actually be realized. If our remaining performance obligations fail to materialize, we could experience a decline in profitability, which could result in a deterioration of our financial position and liquidity.

United States and United Kingdom building services operations: Our building services include: •Maintenance and services for mechanical, electrical, plumbing, fire safety, and building automation systems; •Modification and retrofit projects; •Program development, management, and maintenance for energy systems, including LEED and other sustainable solutions to assist our customers in reducing energy consumption; •Energy efficiency retrofit services, including HVAC, lighting, water, weatherization, and air flow management solutions; •Technical consulting and diagnostic services; •Services aimed at improving indoor air quality; •Installation and support for building systems; •Commercial and government site-based operations and maintenance; •Facility management, maintenance, and services; •Floor care and janitorial services; •Landscaping, lot sweeping, and snow removal; •Other building services, including reception, security, and catering services; •Vendor management and call center services;

United States electrical and mechanical construction and facilities services operations: Our electrical and mechanical construction services primarily involve the design, integration, installation, start-up, operation and maintenance, and provision of services relating to: •Systems for electrical power transmission, distribution, and generation, including power cables, conduits, distribution panels, transformers, generators, uninterruptible power supply systems, and related switch gear and controls; •Premises electrical and lighting systems, including fixtures and controls; •Process instrumentation in the refining, chemical processing, and food processing industries; •Low-voltage systems, such as fire alarm, security, and process control systems; •Voice and data communications, including fiber optic and low voltage cabling, distributed antenna systems, audiovisual systems, and wireless access points; •Sustainable energy solutions such as solar, photovoltaic, and wind, as well as the installation of electric vehicle charging stations; •Roadway and transit lighting and signaling and fiber optic lines; •Computerized traffic control systems, and signal and communication equipment for mass transit systems; •Heating, ventilation, air conditioning, and refrigeration, including both traditional mechanical systems as well as geothermal solutions; •Clean-room process ventilation systems; •Fire protection and suppression systems; •Plumbing, process and high-purity piping systems; •Controls and filtration systems; •Water and wastewater treatment systems; •Central plant heating and cooling systems, including manufacturing and installing sheet metal air handling systems; •Crane and rigging services;

•Millwright services; and •Steel fabrication, erection, and welding services. The electrical and mechanical construction services industry has experienced growth principally due to the increased content, complexity, and sophistication of electrical and mechanical systems resulting, in part, from growth in digital processing, cloud computing, data storage, and the emergence of artificial intelligence. In addition, facilities of all types require extensive electrical distribution systems, sophisticated power supplies, networks of low-voltage and fiber-optic communications cabling, and various mechanical, plumbing, and fire protection and suppression systems. Moreover, the need for substantial environmental controls within a building, due to the heightened need to maintain extensive computer systems at optimal temperatures, and the demand for increased energy efficiency, have continued to expand opportunities for our electrical and mechanical services businesses. The demand for these services is typically driven by non-residential construction and renovation activity and, in recent years, has benefited from the re-shoring of the supply chain, the need for additional high-tech manufacturing facilities, and the energy transition/expansion throughout the United States. Our electrical and mechanical construction services generally fall into one of three categories: (a) large installation projects, with contracts often in the multi-million dollar range, that involve: (i) the construction of manufacturing facilities, data centers, warehousing and distribution facilities, hospitals, and commercial buildings, (ii) institutional, public works, and infrastructure projects, or (iii) the fit-out of large blocks of space within commercial or mixed-use buildings, (b) large and medium sized capital and maintenance projects for commercial, manufacturing, pharmaceutical, healthcare, oil and gas, and industrial clients, and (c) smaller installation projects, of a short duration, typically involving fit-out, renovation, and retrofit work. Our United States electrical and mechanical construction operations accounted for approximately 67% of our 2024 total revenues. Of such revenues, approximately 34% were generated by our electrical construction operations and approximately 66% were generated by our mechanical construction operations. Our largest projects include those within: (a) the network and communications market sector (including data centers, data and fiber projects, and cabling); (b) the high-tech manufacturing market sector (including semiconductor, biotech, life-sciences, and pharmaceutical facilities, as well as projects across the electric vehicle value chain); (c) the commercial market sector (including warehousing and distribution facilities and office or mixed-use buildings); (d) the manufacturing and industrial market sector (including steel, pulp and paper mills, food processing and traditional automotive manufacturing facilities, power generation (including sustainable energy solutions such as solar and wind), oil and gas refineries, and chemical processing plants); (e) the healthcare market sector (including hospitals, surgical centers, rehabilitation and nursing facilities, and medical offices); (f) the institutional market sector (including educational and correctional facilities and research laboratories); (g) the water and wastewater market sector; (h) the transportation market sector (including highways, bridges, airports, and transit systems); and (i) the hospitality and entertainment market sector (including resorts, hotels, gaming facilities, convention centers, and sports stadiums). Our largest projects, which typically range in size from $10 million up to and occasionally exceeding $200 million, represented approximately 54% of our electrical and mechanical construction services revenues in 2024. These projects often involve new construction and a combination of design, installation, and start-up services. Depending on the size and complexity of these projects, they may span multiple years and typically require significant technical and management skills and the financial strength to obtain performance bonds, which are often a condition to bidding for and winning these projects. Our projects of less than $10 million accounted for approximately 46% of our electrical and mechanical construction services revenues in 2024. These projects are typically completed in less than one year. They usually involve electrical and mechanical construction services when an end-user or owner undertakes construction or modification of a facility to accommodate a specific use, upgrade or replace aging systems, or increase energy efficiency. These projects frequently require electrical and mechanical systems to meet special needs such as critical systems power supply, fire protection systems, special environmental controls and high-purity air systems, sophisticated electrical and mechanical systems for data centers, new production lines in manufacturing plants, and office arrangements in existing office buildings. They are not usually dependent upon the new construction market. Demand for these projects and types of services is often prompted by the expiration of leases, changes in technology, the demand for more energy efficient systems, or changes in the customer's plant or office layout in the normal course of a customer's business.

•Military base operations support services; and •Infrastructure and building projects for federal, state, and local governmental agencies. While not all of the above services are performed in both countries, we provide building services throughout the United States and United Kingdom. Our building services operations have built upon our traditional electrical and mechanical construction operations and our client relationships to expand the scope of services being offered and to develop packages of services for customers on a local, regional, and national basis. 3 Our building services operations, which generated approximately 24% of our 2024 total revenues, provide services to owners, operators, tenants, and managers of all types of facilities both on a contractual basis for a specified period of time and on an individual task order basis. Of our building services revenues for 2024, approximately 88% were generated in the United States and approximately 12% were generated in the United Kingdom. Demand for our building services is often driven by customers' decisions to focus on their core competencies, customers' programs to reduce costs, the increasing technical complexity of customers' facilities, including their mechanical, electrical, building automation, voice and data, and other systems, and the need for increased reliability, energy efficiency, and air filtration and sanitization. These trends have led to outsourcing and privatization programs whereby customers in both the private and public sectors seek to contract out those activities that support, but are not directly associated with, the customer's core business. Clients of our building services business include major corporations engaged in information technology, telecommunications, pharmaceuticals, financial services, and manufacturing, institutional organizations, healthcare providers, large retailers and other businesses with geographically dispersed locations, as well as federal and state governments. We provide building services at a number of prominent buildings in the United States, including those that house the National Archives and Records Administration, the Federal Deposit Insurance Corporation, the Government Accountability Office, and the Departments of Transportation, Education, Health and Human Services, Energy, and Homeland Security, as well as other government facilities. We also provide building services, as a prime contractor or a subcontractor, to U.S. military bases and various other governmental agencies. The agreements pursuant to which this division provides services to the federal government are frequently for a base period and a number of option years exercisable at the sole discretion of the government, are often subject to modification or renegotiation by the government in terms of scope of services, and are subject to termination by the government prior to the expiration of the applicable term.

United States industrial services operations: Our industrial services are primarily provided to customers within the oil, gas, and petrochemical industries and consist of: •Refinery turnaround planning and engineering services; •Specialty welding services; •Overhaul and maintenance of critical process units in refineries and petrochemical plants; •Specialty technical services for refineries and petrochemical plants; •Instrumentation, controls, and electrical services for energy infrastructure; •Electrical panel design, fabrication, and installation; •On-site repairs, maintenance, and service of heat exchangers, towers, vessels, and piping;