Quanta Services · Earnings release

PRESS RELEASE

FOR IMMEDIATE RELEASE

Contacts:

Jayshree Desai, CFO

Kip Rupp, CFA, IRC - Investors

Quanta Services, Inc.

Media - Noa Schwartz

FGS Global

QUANTA SERVICES REPORTS SECOND QUARTER 2025 RESULTS

Second Quarter Consolidated Revenues of $6.8 Billion*

Second Quarter GAAP Diluted EPS of $1.52* and Adjusted Diluted EPS of $2.48*

Net Income Attributable to Common Stock of $229.3 Million* and Adjusted EBITDA of $668.8 Million*

Year-to-Date Cash Flow From Operations of $538.9 Million and

Free Cash Flow of $288.2 Million

Remaining Performance Obligations (RPO) of $19.2 Billion* and Total Backlog of $35.8 Billion*

Selected For The Boardman to Hemingway High-Voltage Electric Transmission Project

Raising Full-Year 2025 Outlook to Reflect Strong Second Quarter Results and the Acquisition of Dynamic Systems

* = Record quarterly or record second quarter result

HOUSTON - July 31, 2025 - Quanta Services, Inc. (NYSE: PWR) today announced results for the three and six months ended June 30,

2025. Revenues in the second quarter of 2025 were $6.77 billion compared to revenues of $5.59 billion in the second quarter of 2024, and net income attributable to common stock was $229.3 million, or $1.52 per diluted share, in the

second quarter of 2025 compared to net income attributable to common stock of $188.2 million, or $1.26 per diluted share, in the second quarter of 2024. Adjusted diluted earnings per share attributable to common stock was $2.48 for the second

“Quanta delivered a strong first half of the year, with our second quarter results

reflecting another quarter of double-digit growth in revenue, adjusted EBITDA and adjusted earnings per share and record total backlog of $35.8 billion. These results reflect Quanta’s ability to provide certainty through the power of our

portfolio and world-class execution. Demand for our services remains resilient, fueled by our customers’ multi-year programs to build the power grid, generation and energy infrastructure necessary to support load growth from technology adoption

and manufacturing reshoring and a focus on reliability and security,” said Duke Austin, President and Chief Executive Officer of Quanta Services.

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“This morning, we announced the acquisition of Dynamic Systems (DSI), LLC (Dynamic Systems), a premier,

turnkey mechanical, plumbing and process infrastructure solutions provider with a diversified customer base that strengthens Quanta’s craft and front-end critical path capabilities to provide certainty

for the growing technology, manufacturing and other load center markets. Dynamic Systems’ highly synergistic workforce adds to Quanta’s growth platform and expands our total addressable market across several strategic verticals.

Additionally, Dynamic Systems brings an exceptional management team and a premier craft-skilled workforce that complement Quanta’s culture. As a result of our solid second quarter results and the addition of Dynamic Systems, we are increasing

our full-year 2025 financial expectations for revenue, adjusted EBITDA and adjusted EPS.”

Certain items that impacted Quanta’s results for the

three months ended June 30, 2025 and 2024 are reflected as adjustments in the calculation of Quanta’s adjusted net income attributable to common stock, adjusted diluted earnings per share attributable to common stock and adjusted EBITDA (non-GAAP financial measures). These items are described in the accompanying tables reconciling adjusted net income attributable to common stock to net income attributable to common stock and adjusted diluted

earnings per share attributable to common stock to diluted earnings per share attributable to common stock. Quanta completed four acquisitions during the first six months of 2025 and eight acquisitions during the full year 2024, and the results of

the acquired businesses are included in Quanta’s consolidated results from the respective acquisition dates. For further information on the items that impacted comparability of 2025 and 2024, see the footnotes in the accompanying tables

presenting Supplemental Segment Data and reconciliations of EBITDA, adjusted EBITDA, adjusted net income attributable to common stock and adjusted diluted earnings per share attributable to common stock(non-GAAP financial measures) to their comparable GAAP financial measures.

RECENT HIGHLIGHTS

•

Completed the Acquisition of Dynamic Systems - In July 2025, Quanta completed the acquisition of Dynamic

Systems, for upfront consideration of approximately $1.35 billion. Dynamic Systems is a premier, turnkey mechanical, plumbing and process infrastructure solutions provider with a diversified customer base and exposure to the attractive and

growing technology, semiconductor, healthcare and other load center markets. Founded in 1988 and headquartered in Austin, Texas, Dynamic Systems provides integrated turnkey solutions, including design and preconstruction, 3D modeling,

modularization, construction, commissioning and after-market services, to a high-quality and diverse customer base in key markets across the United States. Through its diverse geographic, customer, end market and service line portfolio, Dynamic

Systems has grown to become one of the largest mechanical solutions providers in the country with a workforce of approximately 2,400 employees. Quanta expects that the financial contribution from Dynamic Systems will be included in the Underground,

Utility and Infrastructure Solutions (Underground and Infrastructure) segment.

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•

Selected for the Boardman to Hemingway High-Voltage Electric Transmission Project - In June 2025, Quanta

was selected by Idaho Power for the Boardman to Hemingway electric transmission line project. Spanning from eastern Oregon to southwestern Idaho, Quanta’s scope of work for the approximately 300-mile, 500-kilovolt transmission project includes design, engineering, procurement, environmental, and construction solutions. Due to population and business growth in the region, the Boardman to Hemingway line is designed

to deliver up to 1,000 megawatts of bidirectional reliable, affordable power, helping utilities meet regional demand. Construction activities have begun, with an in-service date expected in late 2027 and full

completion expected in late 2028. The estimated remaining performance obligations and backlog for this project are included in the Electric Infrastructure Solutions (Electric) segment as of June 30, 2025.

•

Strategic Investment in Bell Lumber and Pole Company - In May 2025, Quanta acquired a minority interest inBell Lumber and Pole Company (Bell). Founded in 1909 and headquartered in New Brighton, Minnesota, Bell is the largest private producer of round wooden poles and other mass timber products, primarily serving the utility, telecom and

construction industries. Quanta’s investment in Bell expands Quanta’s portfolio of core utility infrastructure equipment and enhances Quanta’s ability to offer critical path supply chain solutions to customers. The earnings

contribution from this investment will be recognized as equity in earnings of integral unconsolidated affiliates on our income statement.

•

Capital Deployment - In addition to its investment in Bell, during the second quarter of 2025, Quanta

acquired two companies located in the United States for aggregate consideration of $226.8 million, one specializing in providing civil solutions to utilities and the other specializing in electric utility construction and related support

services. The financial contributions for these companies will be included in the Underground and Infrastructure and the Electric segments, respectively. Year-to-date,Quanta repurchased 538,559 shares of its outstanding common stock in the open market for $134.6 million, and as of July 30, 2025, approximately $365.1 million remained under Quanta’s stock repurchase program.

•

Named 2025 Top Solar Contractor by Solar Power World - In July 2025, Quanta announced that it has been

named the top solar solutions provider in the United States by Solar Power World for the second time in three years and the top energy storage solutions provider in Solar Power World’s first-ever ranking. Quanta operating companies, utilizing

their combined expertise and collaborative efforts, installed more than 10,000 megawatts of domestic solar generating capacity and more than 1,200 megawatts of domestic energy storage capacity in 2024.

RESULTS FOR THE SIX MONTHS ENDED JUNE 30, 2025

Revenues in the six months ended June 30, 2025 were $13.01 billion compared to revenues of $10.63 billion in the six months ended June 30,

2024, and net income attributable to common stock was $373.5 million, or $2.47 per diluted share, in the six months ended June 30, 2025 compared to net income attributable to common stock of $306.5 million, or $2.05 per diluted share,

in the six months ended June 30, 2024. Adjusted diluted earnings per share attributable to common stock was $4.25 for the six months ended June 30, 2025 compared to $3.31 for the six months ended June 30, 2024.

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The long-term outlook for Quanta’s business is positive. However, weather, regulatory, permitting, supply chain, trade policy, macroeconomic challenges

and other factors affecting project timing and execution have impacted, and may impact in the future, Quanta’s financial results. Additionally, we continue to consider future uncertainty associated with overall challenges to the domestic and

global economy, including inflation, interest rates and potential recessionary economic conditions. Quanta’s financial outlook for revenues, margins and earnings reflects management’s effort to align these uncertainties with the backlog

the Company is executing on and the opportunities expected to materialize during the remainder of 2025.

Prior to the Company’s conference call,

management will post a summary of Quanta’s updated 2025 guidance expectations with additional commentary in the “News and Events” and “Financial Info” areas of the Investor Relations section of Quanta’s website athttp://investors.quantaservices.com.

The following forward-looking statements are based on current expectations, and actual results may differ

materially, as described below in Cautionary Statement About Forward-Looking Statements and Information. For the full year ending December 31, 2025, G1Quanta now expects revenues to range between $27.4 billion and $27.9 billion

and net income attributable to common stock to range between $978.5 million and $1.07 billion. Quanta also now expects G2diluted earnings per share attributable to common stock to range between $6.47 and $7.07 and G3adjusted diluted earnings

per share attributable to common stock to range between $10.28 and $10.88. Quanta now expects G4EBITDA to range between $2.50 billion and $2.63 billion and G5adjusted EBITDA to range between $2.76 billion and $2.89 billion.

Additionally, for the full year ending December 31, 2025, G6Quanta continues to expect net cash provided by operating activities to range between $1.70 billion and $2.25 billion and G7free cash flow (anon-GAAP financial measure) to range between $1.20 billion and $1.70 billion.

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SEGMENT PRESENTATION

Beginning with the three months ending March 31, 2025, Quanta reports its results under two reportable segments: (1) Electric Infrastructure

Solutions (Electric) and (2) Underground Utility and Infrastructure Solutions (Underground and Infrastructure). In conjunction with this change, certain prior period amounts have been recast to conform to this new segment reporting structure.

NON-GAAP FINANCIAL MEASURES

The financial measures not prepared in conformity with generally accepted accounting principles in the United States (GAAP) that are utilized in this press

release are provided to enable investors, analysts and management to evaluate Quanta’s performance excluding the effects of certain items that management believes impact the comparability of operating results between reporting periods. In

addition, management believes these measures are useful in comparing Quanta’s operating results with those of its competitors. These measures should be used in addition to, and not in lieu of, financial measures prepared in conformity with

GAAP.

Please see the accompanying tables for reconciliations of the following non-GAAP financial measures for

Quanta’s current and historical results and full-year 2025 expectations (as applicable): adjusted diluted earnings per share attributable to common stock to diluted earnings per share attributable to common stock; adjusted net income

attributable to common stock, EBITDA and adjusted EBITDA to net income attributable to common stock; free cash flow to net cash provided by operating activities; and backlog to remaining performance obligations.

EARNINGS CONFERENCE CALL AND SUPPLEMENTAL MATERIALS INFORMATION

Quanta Services has scheduled a conference call for 9:00 a.m. Eastern Time on July 31, 2025. This event will be facilitated through web-based audio using a Zoom Webinar. To register for and access the event, please log in to the webinar through the Investor Relations section of Quanta’s website (http://investors.quantaservices.com).

Once registered, if you prefer to access the call by phone, dial-in details will be provided on the event access page upon registration and when prompted, please enter the unique Participant ID provided to

join the call. Please allow at least 15 minutes to register and download and install any necessary audio software. For those who cannot participate live, shortly following the webcast a digital recording will be available on the Company’s

website.

Additionally, Quanta has posted its Second Quarter 2025 Operational and Financial Commentary, as well as all other supplemental earnings call

materials, in the Investor Relations section of the Quanta Services website. While management intends to make brief introductory remarks during the earnings call, the Operational and Financial Commentary is intended to largely replace

management’s prepared remarks, allowing additional time for questions from the institutional investment community. For more information, please contact Kip Rupp, Vice President - Investor Relations or Sean Eastman, Director - Investor Relations

at Quanta Services, at 713-629-7600 or investors@quantaservices.com.

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FOLLOW QUANTA IR ON SOCIAL MEDIA

Investors and others should note that while Quanta announces material financial information and makes other public disclosures of information regarding Quanta

through U.S. Securities and Exchange Commission (SEC) filings, press releases and public conference calls, it also utilizes social media to communicate this information. It is possible that the information Quanta posts on social media could be

deemed material. Accordingly, Quanta encourages investors, the media and others interested in our company to follow Quanta, and review the information it posts, on the social media channels listed in the Investor Relations section of the

Quanta Services website.

ABOUT QUANTA SERVICES

Quanta Services is an industry leader in providing specialized infrastructure solutions to the utility, renewable energy, technology, communications, pipeline,

and energy industries. Quanta’s comprehensive services include designing, installing, repairing and maintaining energy, technology and communications infrastructure. With operations throughout the United States, Canada, Australia and select

other international markets, Quanta has the manpower, resources and expertise to safely complete projects that are local, regional, national or international in scope. For more information, visit www.quantaservices.com.

Cautionary Statement About Forward-Looking Statements and Information

This press release (and oral statements regarding the subject matter of this press release, including those made on the conference call and webcast announced

herein) contains forward-looking statements intended to qualify for the “safe harbor” from liability established by the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to,

statements relating to projected revenues, net income, earnings per share, margins, cash flows, liquidity, weighted average shares outstanding, capital expenditures, interest rates and tax rates, as well as other projections of operating results and

GAAP and non-GAAP financial results, including EBITDA, adjusted EBITDA and backlog; expectations regarding Quanta’s business or financial outlook; expectations regarding opportunities, technological

developments, competitive positioning, future economic and regulatory conditions and other trends in particular markets or industries; expectations regarding Quanta’s plans and strategies, including with respect to our supply chain solutions

and expanded or new services offerings; the business plans or financial condition of Quanta’s customers; the potential benefits from, and future financial and operational performance of, acquired businesses and investments, including Dynamic

Systems and Bell; the expected value of contracts or intended contracts with customers, as well as the expected timing, scope, services, term or results of any awarded or expected projects; possible recovery of pending or contemplated insurance

claims, change orders and claims asserted against customers or third parties, as well as the collectability of receivables; the development of and opportunities with respect to future projects, including renewable energy projects, electrical grid

modernization, upgrade and hardening projects, larger transmission and pipeline projects and data center projects; expectations regarding the future availability and price of materials and equipment necessary for the performance of Quanta’s

business; the expected impact of global and domestic economic or political conditions on Quanta’s business, financial condition, results of operations, cash flows, liquidity and demand for our services, including inflation, interest rates,

tariffs and recessionary economic conditions and commodity prices and production volumes; the expected impact of changes or potential changes to climate and the physical and transition risks associated with climate change; statements reflecting

expectations, goals, targets, intentions, strategies, assumptions, plans, or beliefs regarding Quanta’s sustainability strategy; future capital allocation initiatives, including the amount and timing of, and strategies with respect to, any

future acquisitions, investments, cash dividends, repurchases of Quanta’s equity or debt securities or repayments of other outstanding debt; the expected impact of existing or potential legislation or regulation; potential opportunities that

may be indicated by bidding activity or similar discussions with customers; the future demand for, availability of and costs related to labor resources in the industries Quanta serves; the expected recognition and realization of Quanta’s

remaining performance obligations and backlog; expectations regarding the outcome of pending or threatened legal proceedings, as well as the collection of amounts awarded in legal proceedings; and expectations regarding Quanta’s ability to

maintain its current credit ratings; as well as statements reflecting expectations, intentions, assumptions or beliefs about future events, and other statements that do not relate strictly to historical or current facts. These forward-looking

statements are not guarantees of future performance; rather they involve or rely on a number of risks, uncertainties, and assumptions that are difficult to predict or are beyond our control, and reflect management’s beliefs and assumptions

based on information available at the time the statements are made. We caution you that actual outcomes and results may differ materially from what is expressed, implied or forecasted by our forward-looking statements and that any or all of our

forward-looking statements may turn out to be inaccurate or incorrect. Forward-looking statements can be affected by inaccurate assumptions and by known or unknown risks and uncertainties including, among others, market, industry, economic,

financial or political conditions that are outside of the control of Quanta, including economic, energy, infrastructure and environmental policies and plans that are adopted or proposed by the U.S. federal and state governments or other governments

in territories or countries in which Quanta operates, inflation, interest rates, recessionary economic conditions, deterioration of global or specific trade relationships and geopolitical conflicts and political unrest; quarterly variations in

operating and financial results, liquidity, financial condition, cash flows, capital requirements and reinvestment opportunities; trends and growth opportunities in relevant markets, including Quanta’s ability to obtain future project awards;

delays, deferrals, reductions in scope or cancellations of anticipated, pending or existing projects as a result of, among other things, supply chain or production disruptions and other logistical challenges, weather, regulatory or permitting

issues, right of way

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acquisition, environmental processes, project performance issues, claimed force majeure events, protests or

other political activity, legal challenges, inflationary pressure, reductions or eliminations in governmental funding or customer capital constraints; the effect of commodity prices and production volumes, which have been and may continue to be

affected by inflationary pressure, on Quanta’s operations and growth opportunities and on customers’ capital programs and demand for Quanta’s services; the successful negotiation, execution, performance and completion of anticipated,

pending and existing contracts; events arising from operational hazards, including, among others, wildfires and explosions, that can arise due to the nature of Quanta’s services and certain of Quanta’s product solutions, as well as the

conditions in which Quanta operates and can be due to the failure of infrastructure on which Quanta has performed services and result in significant liabilities that may be exacerbated in certain geographies and locations; unexpected costs,

liabilities, fines or penalties that may arise from legal proceedings, indemnity obligations, reimbursement obligations associated with letters of credit or bonds, multiemployer pension plans or other claims or actions asserted against Quanta,

including amounts not covered by, or in excess of the coverage under, third-party insurance; potential unavailability or cancellation of third-party insurance coverage, as well as the exclusion of coverage for certain losses, potential increases in

premiums and deductibles for coverage deemed beneficial to Quanta, increases in amounts or retention amounts or the unavailability of coverage deemed beneficial to Quanta at reasonable and competitive rates (e.g., coverage for wildfire events);

damage to Quanta’s brand or reputation, as well as potential costs, liabilities, fines and penalties, arising as a result of cybersecurity breaches, environmental and occupational health and safety matters, corporate scandal, failure to

successfully perform or negative publicity regarding a high-profile or large-scale infrastructure project, involvement in a catastrophic event (e.g., fire, explosion) or other negative incidents; disruptions in, or failure to adequately protect,

Quanta’s information technology systems; Quanta’s dependence on suppliers, subcontractors, equipment manufacturers and other third-parties, and the impact of, among other things, inflationary pressure, regulatory, supply chain and

logistical challenges on these third parties; estimates and assumptions relating to financial results, remaining performance obligations and backlog; Quanta’s inability to attract, the potential shortage of and increased costs with respect to

skilled employees, as well as Quanta’s inability to retain or attract key personnel and qualified employees; Quanta’s dependence on fixed price contracts and the potential to incur losses with respect to these contracts; cancellation

provisions within contracts and the risk that contracts expire and are not renewed or are replaced on less favorable terms; Quanta’s inability or failure to comply with the terms of its contracts, which may result in additional costs, unexcused

delays, warranty claims, failure to meet performance guarantees, damages or contract terminations; adverse weather conditions, natural disasters and other emergencies, including wildfires, pandemics, hurricanes, tropical storms, floods, debris

flows, earthquakes and other geological- and weather-related hazards; the impact of climate change; Quanta’s ability to generate internal growth; competition in Quanta’s business, including the ability to effectively compete for new

projects and market share, as well as technological advancements and market developments that could reduce demand for Quanta’s services; the failure of existing or potential legislative actions and initiatives to result in increased demand for

Quanta’s services or budgetary or other constraints that may reduce or eliminate tax incentives or government funding for projects, including renewable energy projects, which may result in project delays or cancellations; unavailability of, or

increased prices for, materials, equipment and consumables (such as fuel) used in Quanta’s or its customers’ businesses, including as a result of inflation, supply chain or production disruptions, governmental regulations on sourcing, the

imposition of tariffs, duties, taxes or other assessments, and other changes in U.S. trade relationships with foreign countries; loss of or deterioration of relationships with customers with whom Quanta has long-standing or significant

relationships; the potential that participation in joint ventures or similar structures exposes Quanta to liability or harm to its reputation as a result of acts or omissions by partners; the inability or refusal of customers or third-party

contractors to pay for services, which could result in the inability to collect our outstanding receivables, failure to recover amounts billed to, or avoidance of certain payments received from, customers in bankruptcy or failure to recover on

change orders or contract claims; risks associated with operating in international markets and U.S. territories, including instability of governments, significant currency exchange fluctuations, and compliance with unfamiliar legal and labor systems

and cultural practices, the U.S. Foreign Corrupt Practices Act and other applicable anti-bribery and anti-corruption laws, and complex U.S. and foreign tax regulations and international treaties; inability to successfully identify, complete,

integrate and realize synergies from acquisitions, including the inability to retain key personnel from acquired businesses; the potential adverse impact of acquisitions and investments, including the potential increase in risks already existing in

Quanta’s operations, poor performance or decline in value of acquired businesses or investments and unexpected costs or liabilities that may arise from acquisitions or investments; the adverse impact of impairments of goodwill, other intangible

assets, receivables, long-lived assets or investments; difficulties managing Quanta’s business as it expands and becomes more complex; the impact of the unionized portion of Quanta’s workforce on its operations; inability to access

sufficient funding to finance desired growth and operations, including the ability to access capital markets on favorable terms, as well as fluctuations in the price and trading volume of Quanta’s common stock, debt covenant compliance,

interest rate fluctuations, a downgrade in our credit ratings and other factors affecting financing and investing activities; the ability to obtain bonds, letters of credit and other project security; risks related to the implementation of new

information technology systems; new or changed tax laws, treaties or regulations or the inability to realize deferred tax assets; and other risks and uncertainties detailed in Quanta’s Annual Report on Form10-K for the year ended December 31, 2024, Quanta’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2025 and June 30, 2025 (when

filed) and any other documents that Quanta files with the SEC. For a discussion of these risks, uncertainties and assumptions, investors are urged to refer to Quanta’s documents filed with the SEC that are available through Quanta’s

website at www.quantaservices.com or through the SEC’s Electronic Data Gathering and Analysis Retrieval System (EDGAR) at www.sec.gov. Should one or more of these risks materialize, or should underlying assumptions prove

incorrect, actual results may vary materially from those expressed or implied in any forward-looking statements. Investors are cautioned not to place undue reliance on these forward-looking statements, which are current only as of this date. Quanta

does not undertake and expressly disclaims any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Quanta further expressly disclaims any written or oral statements made

by any third party regarding the subject matter of this press release.

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Quanta Services, Inc. and Subsidiaries

Condensed Consolidated Statements of Operations

For the Three and Six Months Ended

(In thousands, except per share information)

(Unaudited)

Three Months Ended

Six Months Ended

Revenues

$

$

$

$

Cost of services

Gross profit

Equity in earnings of integral unconsolidated affiliates

Selling, general and administrative expenses

)

)

)

)

Amortization of intangible assets

)

)

)

)

Change in fair value of contingent consideration liabilities

)

)

)

)

Operating income

Interest and other financing expenses

)

)

)

)

Interest income

Other income, net

Income before income taxes

Provision for income taxes

Net income

Less: Net income attributable to non-controllinginterests

Net income attributable to common stock

$

$

$

$

Earnings per share attributable to common stock:

Basic

$

$

$

$

Diluted

$

$

$

$

Shares used in computing earnings per share:

Weighted average basic shares outstanding

Weighted average diluted shares outstanding

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Quanta Services, Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

(In thousands)

(Unaudited)

ASSETS

CURRENT ASSETS:

Cash and cash equivalents

$

$

Accounts receivable, net

Contract assets

Inventories, net

Prepaid expenses and other current assets

Total current assets

PROPERTY AND EQUIPMENT, net

OPERATING LEASERIGHT-OF-USE ASSETS

OTHER ASSETS, net

OTHER INTANGIBLE ASSETS, net

GOODWILL

Total assets

$

$

LIABILITIES AND EQUITY

CURRENT LIABILITIES:

Current maturities of long-term debt

$

$

Current portion of operating lease liabilities

Accounts payable and accrued expenses

Contract liabilities

Total current liabilities

LONG-TERM DEBT, net of current maturities

OPERATING LEASE LIABILITIES, net of current portion

DEFERRED INCOME TAXES

INSURANCE AND OTHER NON-CURRENT LIABILITIES

Total liabilities

TOTAL STOCKHOLDERS’ EQUITY

NON-CONTROLLING INTERESTS

TOTAL EQUITY

Total liabilities and equity

$

$

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Quanta Services, Inc. and Subsidiaries

Supplemental Segment Data

For the Three and Six Months Ended

(In thousands, except percentages)

(Unaudited)

Segment Results

During the three months ended March 31, 2025, Quanta began reporting its results under two reportable segments: (1) Electric and (2) Underground

and Infrastructure. In conjunction with this change, certain prior period amounts have been recast to conform to this new segment reporting structure. The following table sets forth segment revenues, segment operating income and operating margins

for the periods indicated. Operating margins are calculated by dividing operating income by revenues.

Three Months Ended June 30,

Six Months Ended June 30,

Revenues:

Electric

$

%

$

%

$

%

$

%

Underground and Infrastructure

Consolidated revenues

$

%

$

%

$

%

$

%

Operating income (loss):

Electric (a)

$

%

$

%

$

%

$

%

Underground and Infrastructure (b)

%

%

%

%

Corporate and Non-Allocated Costs (c)

)

)%

)

)%

)

)%

)

)%

Consolidated operating income

$

%

$

%

$

%

$

%

(a)

Includes equity in earnings of integral unconsolidated affiliates of $14.4 million and $8.6 million

for the three months ended June 30, 2025 and 2024 and $27.4 million and $20.9 million for the six months ended June 30, 2025 and 2024.

(b)

Includes $4.2 million and $8.5 million for the three and six months ended June 30, 2025 that,

pursuant to an acquisition purchase agreement, was withheld from the sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations. Includes a loss of $11.2 million for the six months ended

June 30, 2024 on the disposition of a non-core business, which also impacted operating income as a percentage of segment revenue by approximately 50 basis points.

(c)

Includes, among other things, amortization expense of $113.2 million and $79.2 million for the three

months ended June 30, 2025 and 2024 and $222.7 million and $156.7 million for the six months ended June 30, 2025 and 2024, as well as acquisition and integration costs of $20.4 million and $8.9 million for the three

months ended June 30, 2025 and 2024 and $29.9 million, and $18.4 million for the six months ended June 30, 2025 and 2024.

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Quanta Services, Inc. and Subsidiaries

Supplemental Data

(In

thousands)

(Unaudited)

Remaining Performance Obligations and Backlog (a non-GAAP financial measure)

Quanta’s remaining performance obligations represent management’s estimate of consolidated revenues that are expected to be realized from

the remaining portion of firm orders under fixed price contracts not yet completed or for which work has not yet begun, which includes estimated revenues attributable to consolidated joint ventures and variable interest entities, revenues from

funded and unfunded portions of government contracts to the extent they are reasonably expected to be realized, and revenues from change orders and claims to the extent management believes they will be earned and are probable of collection.

Quanta has also historically disclosed its backlog, a measure commonly used in its industry but not recognized under GAAP. Quanta believes this measure

enables management to more effectively forecast its future capital needs and results and better identify future operating trends that may not otherwise be apparent. Quanta believes this measure is also useful for investors in forecasting

Quanta’s future results and comparing Quanta to its competitors. Quanta’s remaining performance obligations, as described above, are a component of its backlog calculation, which also includes estimated orders under master service

agreements (MSAs), including estimated renewals, and certain non-fixed price contracts. Quanta’s methodology for determining backlog may not be comparable to the methodologies used by other companies.

The following table reconciles Quanta’s total remaining performance obligations to total backlog by reportable segment, along with estimates of

amounts expected to be realized within 12 months. During the three months ended March 31, 2025, Quanta began reporting its results under two reportable segments: (1) Electric and (2) Underground and Infrastructure. In conjunction with

this change, certain prior period amounts have been recast to conform to this new segment reporting structure. The following table shows dollars in thousands.

Total

Total

Total

Electric

Remaining performance obligations

$

$

$

$

$

$

Estimated orders under MSAs and short-term, non-fixedprice contracts

Backlog (a)

$

$

$

$

$

$

Underground and Infrastructure

Remaining performance obligations

$

$

$

$

$

$

Estimated orders under MSAs and short-term, non-fixedprice contracts

Backlog

$

$

$

$

$

$

Total

Remaining performance obligations

$

$

$

$

$

$

Estimated orders under MSAs and short-term, non-fixedprice contracts

Backlog

$

$

$

$

$

$

(a)

Excludes backlog from contracts that are still subject to certain regulatory approvals.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Adjusted Net Income and Adjusted Diluted Earnings

Per Share Attributable to Common Stock

For the Three and Six Months Ended

(In thousands, except per share information)

(Unaudited)

The following table presents the reconciliations of the non-GAAPfinancial measures of adjusted net income attributable to common stock to net income attributable to common stock and adjusted diluted earnings per share attributable to common stock to diluted earnings per share attributable to common stock for the

three and six months ended June 30, 2025 and 2024. These reconciliations are intended to provide useful information to investors and analysts as they evaluate Quanta’s performance. Management believes that the exclusion of certain items

from net income attributable to common stock and diluted earnings per share attributable to common stock enables Quanta and its investors to more effectively evaluate Quanta’s operations period over period and better identify operating trends

that may not otherwise be apparent due to, among other reasons, the variable nature of these items period over period. In addition, management believes these measures may be useful for investors in comparing Quanta’s operating results with

other companies that may be viewed as our peers. However, these non-GAAP measures should not be considered as alternatives to net income attributable to common stock and diluted earnings per share attributable

to common stock or other measures of performance that are derived in accordance with GAAP.

As to certain of the items in the table: (i) non-cash stock-based compensation expense varies from period to period due to acquisition activity, changes in the estimated fair value of performance-based awards, forfeiture rates, accelerated vesting and

amounts granted; (ii) amortization of intangible assets and amortization included in equity in earnings are impacted by Quanta’s acquisition activities and investments in unconsolidated affiliates, and therefore can vary from period to

period; (iii) acquisition and integration costs vary from period to period depending on the level and complexity of Quanta’s acquisition activity; (iv) change in fair value of contingent consideration liabilities varies from period to

period depending on, among other things, the performance in post-acquisition periods of certain acquired businesses and the effect of present value accretion on fair value calculations; (v) equity in earnings and losses of non-integral unconsolidated affiliates varies from period to period depending on the activity and financial performance of such affiliates, the operations of which are not operationally integral to Quanta; and

(vi) gains and losses on the sales of investments and businesses vary from period to period depending on activity.

Because adjusted net income

attributable to common stock and adjusted diluted earnings per share attributable to common stock, as defined, exclude some, but not all, items that affect net income attributable to common stock and diluted earnings per share attributable to common

stock, they may not be comparable to similarly titled measures of other companies. The most comparable GAAP financial measures, net income attributable to common stock and diluted earnings per share attributable to common stock, and information

reconciling the GAAP and non-GAAP financial measures, are included in the table to follow.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Adjusted Net Income and Adjusted Diluted Earnings

Per Share Attributable to Common Stock

For the Three and Six Months Ended

(In thousands, except per share information)

(Unaudited)

Three Months Ended

Six Months Ended

Reconciliation of adjusted net income attributable to common stock:

Net income attributable to common stock (GAAP as reported)

$

$

$

$

Acquisition and integration costs (a)

Change in fair value of contingent consideration liabilities

Equity in losses (earnings) of non-integral unconsolidated

affiliates

)

Loss on disposition of business, net (b)

—

—

Income tax impact of adjustments (c)

)

)

)

)

Adjusted net income attributable to common stock before certainnon-cash adjustments

Non-cash stock-based compensation

Amortization of intangible assets

Amortization included in equity in earnings of unconsolidated affiliates

Income tax impact of non-cash adjustments (c)

)

)

)

)

Adjusted net income attributable to common stock

$

$

$

$

Reconciliation of adjusted diluted earnings per share:

Diluted earnings per share attributable to common stock (GAAP as reported)

$

$

$

$

Acquisition and integration costs (a)

Change in fair value of contingent consideration liabilities

Equity in losses (earnings) of non-integral unconsolidated

affiliates

—

—

—

)

Loss on disposition of business, net (b)

—

—

—

Income tax impact of adjustments (c)

)

)

)

)

Adjusted diluted earnings per share before certainnon-cash adjustments

Non-cash stock-based compensation

Amortization of intangible assets

Amortization included in equity in earnings of unconsolidated affiliates

Income tax impact of non-cash adjustments (c)

)

)

)

)

Adjusted diluted earnings per share

$

$

$

$

Weighted average shares outstanding for diluted and adjusted diluted earnings per share

See notes to follow.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Adjusted Net Income and Adjusted Diluted Earnings

Per Share Attributable to Common Stock

For the Three and Six Months Ended

(In thousands, except per share information)

(Unaudited)

(a)

The amounts for the three and six months ended June 30, 2025 include $4.2 million and

$8.5 million that, pursuant to an acquisition purchase agreement, were withheld from the sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations.

(b)

The amount for the six months ended June 30, 2024 is a loss of $11.2 million on the disposition of a non-core business, partially offset by a gain of $7.5 million as a result of the sale of a non-integral equity method investment.

(c)

The income tax impact of adjustments that are subject to tax is determined using the incremental statutory tax

rates of the jurisdictions to which each adjustment relates for the respective periods.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

EBITDA and Adjusted EBITDA

For the Three and Six Months Ended

(In thousands)

(Unaudited)

The following table presents reconciliations of the non-GAAPfinancial measures of EBITDA and adjusted EBITDA to net income attributable to common stock for the three and six months ended June 30, 2025 and 2024. These reconciliations are intended to provide useful information to investors and analysts as

they evaluate Quanta’s performance. EBITDA is defined as earnings before interest and other financing expenses, taxes, depreciation and amortization, and adjusted EBITDA is defined as EBITDA adjusted for certain other items as described below.

These measures should not be considered as an alternative to net income attributable to common stock or other financial measures of performance that are derived in accordance with GAAP. Management believes that the exclusion of these items from net

income attributable to common stock enables Quanta and its investors to more effectively evaluate Quanta’s operations period over period and to identify operating trends that might not be apparent due to, among other reasons, the variable

nature of these items period over period. In addition, management believes these measures may be useful for investors in comparing Quanta’s operating results with other companies that may be viewed as its peers.

As to certain of the items below: (i) non-cash stock-based compensation expense varies from period to period due

to acquisition activity, changes in the estimated fair value of performance-based awards, forfeiture rates, accelerated vesting and amounts granted; (ii) acquisition and integration costs vary from period to period depending on the level and

complexity of Quanta’s acquisition activity; (iii) equity in earnings and losses of non-integral unconsolidated affiliates varies from period to period depending on the activity and financial

performance of such affiliates, the operations of which are not operationally integral to Quanta; (iv) gains and losses on the sales of investments and businesses vary from period to period depending on activity; and (v) change in fair

value of contingent consideration liabilities varies from period to period depending on, among other things, the performance in post-acquisition periods of certain acquired businesses and the effect of present value accretion on fair value

calculations. Because EBITDA and adjusted EBITDA, as defined, exclude some, but not all, items that affect net income attributable to common stock, such measures may not be comparable to similarly titled measures of other companies. The most

comparable GAAP financial measure, net income attributable to common stock, and information reconciling the GAAP and non-GAAP financial measures, are included below.

Three Months Ended

Six Months Ended

Net income attributable to common stock (GAAP as reported)

$

$

$

$

Interest and other financing expenses

Interest income

)

)

)

)

Provision for income taxes

Depreciation expense

Amortization of intangible assets

Interest, income taxes, depreciation and amortization included in equity in earnings of integral

unconsolidated affiliates

EBITDA

Non-cash stock-based compensation

Acquisition and integration costs (a)

Equity in losses (earnings) of non-integral unconsolidated

affiliates

)

Loss on disposition of business, net (b)

—

—

Change in fair value of contingent consideration liabilities

Adjusted EBITDA

$

$

$

$

See notes to follow.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

EBITDA and Adjusted EBITDA

For the Three and Six Months Ended

(In thousands)

(Unaudited)

(a)

The amounts for the three and six months ended June 30, 2025 include $4.2 million and

$8.5 million that, pursuant to an acquisition purchase agreement, were withheld from the sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations.

(b)

The amount for the six months ended June 30, 2024 is a loss of $11.2 million on the disposition of a non-core business, partially offset by a gain of $7.5 million as a result of the sale of a non-integral equity method investment.

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Free Cash Flow

For the

Three and Six Months Ended

(In thousands)

(Unaudited)

Reconciliation of Free Cash Flow:

The following table presents a reconciliation of the non-GAAP financial measure of free cash flow to net cash provided

by operating activities for the three and six months ended June 30, 2025 and 2024. This reconciliation is intended to provide useful information to investors and analysts as they evaluate Quanta’s ability to generate the cash required to

maintain and potentially expand its business. Free cash flow is defined as net cash provided by operating activities less net capital expenditures. Net capital expenditures is defined as capital expenditures less proceeds from the sale of property

and equipment and from insurance settlements related to property and equipment. Management believes that free cash flow provides useful information to Quanta’s investors because free cash flow is viewed by management as an important indicator

of how much cash is provided or used by routine business operations, including the impact of net capital expenditures. Management uses this measure for capital allocation purposes as it is viewed as a measure of cash available to fund debt payments,

acquire businesses, repurchase common stock and debt securities, declare and pay dividends and transact other investing and financing activities. However, this measure should not be considered as an alternative to net cash provided by operating

activities or other measures of performance that are derived in accordance with GAAP. The most comparable GAAP financial measure, net cash provided by operating activities, and information reconciling the GAAP andnon-GAAP financial measures, are included below. The following table shows dollars in thousands.

Three Months Ended

Six Months Ended

Net cash provided by operating activities

$

$

$

$

Less: Net capital expenditures:

Capital expenditures

)

)

)

)

Cash proceeds from sale of property and equipment and related insurance settlements

Net capital expenditures

)

)

)

)

Free Cash Flow

$

$

$

$

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Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Estimated Adjusted Net Income and

Adjusted Diluted Earnings Per Share

Attributable to Common Stock

(In

thousands, except per share information)

(Unaudited)

The following table presents reconciliations of the non-GAAP financial measures of

estimated adjusted net income attributable to common stock to estimated net income attributable to common stock and estimated adjusted diluted earnings per share attributable to common stock to estimated diluted earnings per share attributable to

common stock for the full year ending December 31, 2025. These reconciliations are intended to provide useful information to investors and analysts as they evaluate Quanta’s expected future performance. Management believes that the

exclusion of certain items from net income attributable to common stock and diluted earnings per share attributable to common stock enables Quanta and its investors to more effectively evaluate Quanta’s operations period over period and better

identify operating trends that may not otherwise be apparent due to, among other reasons, the variable nature of these items period over period. In addition, management believes these measures may be useful for investors in comparing Quanta’s

operating results with other companies that may be viewed as its peers. However, these non-GAAP measures should not be considered as alternatives to net income attributable to common stock and diluted earnings

per share attributable to common stock or other measures of performance that are derived in accordance with GAAP.

As to certain of the items below: (i) non-cash stock-based compensation expense may vary from period to period due to acquisition activity, changes in the estimated fair value of performance-based awards, forfeiture rates, accelerated vesting

and amounts granted; (ii) amortization of intangible assets and amortization included in equity in earnings are impacted by Quanta’s acquisition activities and investments in unconsolidated affiliates, and therefore can vary from period to

period; (iii) acquisition and integration costs vary from period to period depending on the level and complexity of Quanta’s acquisition activity; (iv) change in fair value of contingent consideration liabilities varies from period to

period depending on, among other things, the performance in post-acquisition periods of certain acquired businesses and the effect of present value accretion on fair value calculations; and (v) equity in earnings and losses of non-integral unconsolidated affiliates varies from period to period depending on the activity and financial performance of such affiliates, the operations of which are not operationally integral to Quanta.

Because adjusted net income attributable to common stock and adjusted diluted earnings per share attributable to common stock, as defined, exclude some, but

not all, items that affect net income attributable to common stock and diluted earnings per share attributable to common stock, they may not be comparable to similarly titled measures of other companies. The most comparable GAAP financial measures,

net income attributable to common stock and diluted earnings per share attributable to common stock, and information reconciling the GAAP and non-GAAP financial measures, are included in the table to follow.

-MORE-

Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Estimated Adjusted Net Income and

Adjusted Diluted Earnings Per Share

Attributable to Common Stock

(In

thousands, except per share information)

(Unaudited)

Estimated Range

Full Year Ending

Reconciliation of estimated adjusted net income attributable to common stock:

Net income attributable to common stock (as defined by GAAP)

$

$

Acquisition and integration costs (a)

Change in fair value of contingent consideration liabilities

Equity in losses of non-integral unconsolidated

affiliates

Non-cash stock-based compensation

Amortization of intangible assets

Amortization included in equity in earnings of unconsolidated affiliates

Income tax impact of adjustments (b)

)

)

Adjusted net income attributable to common stock

$

$

Reconciliation of adjusted diluted earnings per share:

Diluted earnings per share attributable to common stock (as defined by GAAP)

$

$

Acquisition and integration costs (a)

Change in fair value of contingent consideration liabilities

Equity in losses of non-integral unconsolidated

affiliates

—

—

Non-cash stock-based compensation

Amortization of intangible assets

Amortization included in equity in earnings of unconsolidated affiliates

Income tax impact of adjustments (b)

)

)

Adjusted diluted earnings per share

$

$

Weighted average shares outstanding for diluted and adjusted diluted earnings per share

attributable to common stock

(a)

Includes $16.4 million that, pursuant to an acquisition purchase agreement, were withheld from the

sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations.

(b)

The income tax impact of adjustments that are subject to tax is determined using the incremental statutory tax

rates of the jurisdictions to which each adjustment relates for the respective periods.

-MORE-

Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Estimated EBITDA and Adjusted EBITDA

(In

thousands)

(Unaudited)

The following table presents the reconciliations of the non-GAAP financial measures of

estimated EBITDA and estimated adjusted EBITDA to estimated net income attributable to common stock for the full year ending December 31, 2025. These reconciliations are intended to provide useful information to investors and analysts as they

evaluate Quanta’s expected future performance. EBITDA is defined as earnings before interest and other financing expenses, taxes, depreciation and amortization, and adjusted EBITDA is defined as EBITDA adjusted for certain other items as

described below. These measures should not be considered as an alternative to net income attributable to common stock or other financial measures of performance that are derived in accordance with GAAP. Management believes that the exclusion of

these items from net income attributable to common stock enables Quanta and its investors to more effectively evaluate Quanta’s operations period over period and to identify operating trends that might not be apparent due to, among other

reasons, the variable nature of these items period over period. In addition, management believes these measures may be useful for investors in comparing Quanta’s operating results with other companies that may be viewed as its peers.

As to certain of the items below: (i) non-cash stock-based compensation expense varies from period to period due

to acquisition activity, changes in the estimated fair value of performance-based awards, forfeiture rates, accelerated vesting and amounts granted; (ii) acquisition and integration costs vary from period to period depending on the level and

complexity of Quanta’s acquisition activity; (iii) change in fair value of contingent consideration liabilities varies from period to period depending on, among other things, the performance in post-acquisition periods of certain acquired

businesses and the effect of present value accretion on fair value calculations; and (iv) equity in earnings and losses of non-integral unconsolidated affiliates varies from period to period depending on

the activity and financial performance of such affiliates, the operations of which are not operationally integral to Quanta.

Because EBITDA and adjusted

EBITDA, as defined, exclude some, but not all, items that affect net income attributable to common stock, such measures may not be comparable to similarly titled measures of other companies. The most comparable GAAP financial measure, net income

attributable to common stock, and information reconciling the GAAP and non-GAAP financial measures, are included in the table to follow.

Estimated Range

Full Year Ending

Net income attributable to common stock (as defined by GAAP)

$

$

Interest and other financing expenses, net

Provision for income taxes

Depreciation expense

Amortization of intangible assets

Interest, income taxes, depreciation and amortization included in equity in earnings of integral

unconsolidated affiliates

EBITDA

Non-cash stock-based compensation

Acquisition and integration costs (a)

Change in fair value of contingent consideration liabilities

Equity in losses of non-integral unconsolidated

affiliates

Adjusted EBITDA

$

$

(a)

Includes $16.4 million that, pursuant to an acquisition purchase agreement, were withheld from the

sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations.

-MORE-

Quanta Services, Inc. and Subsidiaries

Reconciliation of Non-GAAP Financial Measures

Estimated Free Cash Flow

(In

thousands)

(Unaudited)

The following table presents a reconciliation of the non-GAAP financial measure of

estimated free cash flow to estimated net cash provided by operating activities for the full year ending December 31, 2025. This reconciliation is intended to provide useful information to investors and analysts as they evaluate Quanta’s

expectations regarding its ability to generate the cash required to maintain and potentially expand its business. Free cash flow is defined as net cash provided by operating activities less net capital expenditures. Net capital expenditures is

defined as capital expenditures less proceeds from the sale of property and equipment and from insurance settlements related to property and equipment. Management believes that free cash flow provides useful information to Quanta’s investors

because free cash flow is viewed by management as an important indicator of how much cash is provided or used by routine business operations, including the impact of net capital expenditures. Management uses this measure for capital allocation

purposes as it is viewed as a measure of cash available to fund debt payments, acquire businesses, repurchase common stock and debt securities, declare and pay dividends and transact other investing and financing activities. However, this measure

should not be considered as an alternative to net cash provided by operating activities or other measures of performance that are derived in accordance with GAAP. The most comparable GAAP financial measure, net cash provided by operating activities,

and information reconciling the GAAP and non-GAAP financial measures, are included below.

Estimated Range

Full Year Ending

Net cash provided by operating activities

$

$

Less: Net capital expenditures

)

)

Free Cash Flow

$

$

###