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Quanta Services

NYSE: PWR · USD

Quanta Services (PWR) Economic Moat Analysis—

Competitive advantages, dated evidence and erosion risks.

Uncertain economic moat

Quanta demonstrates specialized workforce and training capabilities, substantial project capacity and repeat customer awards. These establish competitive capability, but the passages do not establish a durable economic moat. Some markets have low entry barriers, customers can self-perform, and contracts often permit cancellation without guaranteed volume. Pricing power is mixed: customer approval of a major claim demonstrates negotiated recovery, while fixed-price exposure and price-sensitive awards constrain repricing. Strong operating results support execution, without proving durable differentiation.

Intangible assets

Specialized training infrastructure, technical capabilities and established customer relationships support current competitive capability. Repeat awards demonstrate customer acceptance; a durable advantage over alternative providers remains unestablished.

Durability
Training facilities and established relationships may take time to replicate, but the catalog does not establish their relative scarcity, replacement cost or ability to sustain superior economics. Manufacturing investments provide potential additional differentiation; their proposed supply-chain benefits remain management expectations.
Competitors
Comparison not established
Erosion risks
Industry labor shortages, subcontractors developing competing expertise, low entry barriers in some markets and customer self-performance could erode differentiation. Cancellation rights and MSAs without minimum volumes weaken customer dependence.
What would invalidate the thesis
The proposed relationship and expertise advantage would be undermined by repeated losses of existing-customer awards to alternative providers or customer self-performance, persistent inability to staff awarded work, or evidence that comparable technical and training capabilities are readily replicated. Conversely, sustained preferential awards and demonstrated pricing premiums attributable to these capabilities would strengthen the moat case.
Evidence (5) · Counterevidence (6)

Changes since the previous analysis

  • Retain the uncertain moat verdict: current capabilities and repeat awards remain insufficient to establish durable economic differentiation.
  • Reassessed and retained pricing grades of 2, 3, 2 and 1 and management grades of 2, 3, 3 and 3 using current catalog citations.
  • Do not treat named compensation peers as established direct service competitors; the disclosed selection criteria combine customer, talent and investor competition.
  • Leave all four moat criteria null because the economic moat remains unestablished; this does not negate demonstrated customer demand or management execution.

Evidence limitations

  • The supplied passages establish operating capabilities and results but provide little comparative evidence of service-level market share, pricing premiums, customer switching costs or persistent cost advantages.
  • Competition disclosures primarily identify generic alternatives. MasTec, Inc. appears in a compensation peer group, but the passage does not establish which peers compete for service contracts or their business overlap; competitor arrays are therefore empty.
  • Statements attributing customer relationships to reputation and claiming future supply-chain benefits are management assertions. Investments and training infrastructure exist, but their durable economic benefits are not demonstrated.
  • Backlog includes estimated MSA orders and acquisitions; its growth is not a measured retention rate or guaranteed future revenue. Acquisition valuation attrition assumptions are not realized customer retention statistics.
  • Annual figures within the supplied catalog are not fully consistent across the 2025 filing and proxy extracts. The assessment relies primarily on clearly identified interim operating results and transaction disclosures rather than reconciling unsupported annual totals.
  • All supplied source dates have dateKind filed. Filing dates are not substituted for the distinct event dates stated within passages. Interim results are unaudited, and issuer-reported achievements are not independent comparative validation.

Financial indicators to test against the thesis

Calculated from annual filings. Missing data remains unavailable. Detailed financial charts remain in the other topics.

Financial indicators to test against the thesis
PeriodGross marginOperating marginROICFCF margin
202115.0%5.1%7.5%1.5%
202214.8%5.1%7.3%4.1%
202314.1%5.4%9.8%5.5%
202414.8%5.7%10.3%6.2%
202515.0%5.7%9.5%5.7%

Pricing power50

  • Pricing outcomes

    Customer approval of the major Canadian project claim balance demonstrates negotiated contract-price recovery. It does not establish a general pricing premium or cash collection. Remaining unapproved claims and price-sensitive awards support a mixed assessment.

  • Customer demand

    New awards with existing customers in 2025 and additional awards and increased volume in first-half 2026 demonstrate strong repeat demand. This is indirect operating evidence of retention, not a measured renewal rate or proof of switching costs; contractual cancellation and volume discretion remain.

  • Margin resilience

    Second-quarter gross margin increased from 14.9% to 16.2% and operating margin from 5.5% to 7.3%; first-half operating margin also improved. These are positive realized outcomes. Acquisition contributions, materials mix and contractual cost exposure limit attribution to pricing and evidence of resilience across adverse conditions.

  • Pricing freedom

    Fixed-price contracts generated 62.3% of first-half 2026 revenue, and contractual provisions may not adequately reimburse added costs. Customer cancellation rights and uncommitted MSA volumes further constrain terms. Approved claim recovery demonstrates some negotiating ability, but broad repricing freedom is weak.

Management69

  • Capital discipline

    First-half operating cash generation of $1.49 billion accompanied $451.0 million of capital expenditures and $930.3 million of acquisition cash spending. No open-market repurchases occurred. Cash generation supports deployment capacity, while borrowing-funded acquisitions, share consideration and limited demonstrated acquisition-return evidence warrant a mixed grade. Working-capital movements also influence cash generation.

  • Incentive alignment

    Actual incentive arrangements combine annual financial and safety metrics with three-year PSUs tied to ROIC, cumulative adjusted EPS and relative shareholder return. Executives exceeded ownership requirements at year-end 2025. These substantiate alignment, although incentive EBITDA adjustments weaken the direct link to unadjusted outcomes. The grade does not assume adoption of a proposed award or exceptional alignment.

  • Execution

    Revenue and operating-income growth, increased operating cash generation, additional existing-customer awards and approval of a major claim support strong demonstrated execution. This assessment partly uses indirect operating evidence; acquisition contributions and slightly below-target 2025 safety improvement limit attribution and breadth.

  • Governance

    Disclosed practices include annual director elections, a separate independent chair, independent standing committees and mandatory recovery of excess incentive compensation following qualifying restatements. Actual director attendance exceeded 75% of applicable meetings. These establish substantive governance practices, without demonstrating exceptional long-term oversight effectiveness or assuming proposed election outcomes.

Sources and methodology

Current publication · Updated 19/10/2026 · Version 5

AI interpretation based on checked source excerpts. Issuer assertions and evidence limitations remain explicit.

Policy quality-scores-2: six equally weighted categories. The overall score requires full coverage. Missing inputs are not zero. Qualitative grades are sourced interpretations, not probabilities. 5/6 · 19/10/2026

Moat—

Insufficient evidence for every rubric criterion; no category score is inferred.

structural advantage · — · Training infrastructure and repeat awards establish capability, while low entry barriers in some markets and subcontractor competition limit the structural inference. A durable advantage over alternatives cannot be established.

durability · — · Established relationships and specialized training could persist, but the passages do not establish their defensibility or duration of economic benefit. Supply-chain investment benefits remain prospective.

customer dependency · — · Existing customers award additional work, demonstrating repeat demand. Cancellation rights, uncommitted MSA volumes and in-house alternatives prevent establishing durable dependence on Quanta.

erosion resilience · — · Strong recent results and repeat awards do not establish resilience of a structural advantage through competitive erosion. Skilled-labor shortages and replicable capabilities remain relevant pressures, without proving realized competitive deterioration.

Pricing power50

Equal-weight average of four evidence-backed rubric grades (0–4), scaled to 100.

realized pricing · 2/4 · Customer approval of the major Canadian project claim balance demonstrates negotiated contract-price recovery. It does not establish a general pricing premium or cash collection. Remaining unapproved claims and price-sensitive awards support a mixed assessment.

retention · 3/4 · New awards with existing customers in 2025 and additional awards and increased volume in first-half 2026 demonstrate strong repeat demand. This is indirect operating evidence of retention, not a measured renewal rate or proof of switching costs; contractual cancellation and volume discretion remain.

margin resilience · 2/4 · Second-quarter gross margin increased from 14.9% to 16.2% and operating margin from 5.5% to 7.3%; first-half operating margin also improved. These are positive realized outcomes. Acquisition contributions, materials mix and contractual cost exposure limit attribution to pricing and evidence of resilience across adverse conditions.

contractual freedom · 1/4 · Fixed-price contracts generated 62.3% of first-half 2026 revenue, and contractual provisions may not adequately reimburse added costs. Customer cancellation rights and uncommitted MSA volumes further constrain terms. Approved claim recovery demonstrates some negotiating ability, but broad repricing freedom is weak.

Predictability99

Five consecutive annual periods. Equal weights: nondeclining revenue frequency; revenue-growth volatility (5–40pp); positive FCF frequency; FCF-margin volatility (3–20pp). Stability indicator, not a growth forecast.

Nondeclining revenue years (%)
100.00
Revenue growth volatility (pp)
6.49
Positive FCF years (%)
100.00
FCF margin volatility (pp)
1.70

Financial strength43

Equal-weight grades: debt/FCF (1–8x), net debt/earnings before interest and tax (0–5x), interest service (1–12x), current ratio (0.75–2x). Earnings use reported operating income, or reported pretax profit plus reported interest expense when operating income is unavailable. Interest service uses earnings/interest expense; if unavailable, it uses reported operating cash flow/cash interest paid, without relabeling cash paid as accrued expense. Nonpositive cash flow/earnings score 0 for their service component; reported zero interest with a positive numerator scores 100. Net cash scores 100 for net leverage. Missing disclosures remain unavailable. General nonfinancial-company rubric, not a credit rating; exceptional and nonoperating gains are not normalized out. IFRS finance-cost and cash-flow classifications retain their reported scope.

debtFcfGrade
61.45
netDebtEbitGrade
31.05
interestCoverageGrade
46.94
currentRatioGrade
30.90
Debt / FCF (x)
3.70
Net debt / operating income (x)
3.45
Interest coverage (x)
6.16
Current ratio (x)
1.14

Capital allocation82

Three-year equal-weight indicators: pretax return on average invested capital (0–25%; equity + debt − cash, each year and its prior year), share-count growth (0–5%, lower better), share-based cost/revenue (2–20%, lower better), consolidated FCF/net income (0–1x). Return uses reported operating income or, if unavailable, EBIT calculated from reported pretax profit plus reported interest expense; exceptional/nonoperating gains are not normalized out. Share-based cost uses the reported cash-flow add-back or, if absent, separately reported recognized compensation expense; the latter never becomes an FCF adjustment. Nonpositive net income scores 0 for cash conversion; absent income/FCF stays unavailable. Nonpositive invested capital has no defined return and remains unavailable. Does not establish acquisition quality or buyback timing.

3-year pre-tax operating return (%)
12.94
3-year average dilution (%)
1.22
3-year average SBC / revenue (%)
0.63
cashConversionGrade
100.00

Management69

Equal-weight average of four evidence-backed rubric grades (0–4), scaled to 100.

capital discipline · 2/4 · First-half operating cash generation of $1.49 billion accompanied $451.0 million of capital expenditures and $930.3 million of acquisition cash spending. No open-market repurchases occurred. Cash generation supports deployment capacity, while borrowing-funded acquisitions, share consideration and limited demonstrated acquisition-return evidence warrant a mixed grade. Working-capital movements also influence cash generation.

incentive alignment · 3/4 · Actual incentive arrangements combine annual financial and safety metrics with three-year PSUs tied to ROIC, cumulative adjusted EPS and relative shareholder return. Executives exceeded ownership requirements at year-end 2025. These substantiate alignment, although incentive EBITDA adjustments weaken the direct link to unadjusted outcomes. The grade does not assume adoption of a proposed award or exceptional alignment.

execution · 3/4 · Revenue and operating-income growth, increased operating cash generation, additional existing-customer awards and approval of a major claim support strong demonstrated execution. This assessment partly uses indirect operating evidence; acquisition contributions and slightly below-target 2025 safety improvement limit attribution and breadth.

governance · 3/4 · Disclosed practices include annual director elections, a separate independent chair, independent standing committees and mandatory recovery of excess incentive compensation following qualifying restatements. Actual director attendance exceeded 75% of applicable meetings. These establish substantive governance practices, without demonstrating exceptional long-term oversight effectiveness or assuming proposed election outcomes.

Evidence

This segment also includes (i) the majority of the financial results of our advanced training facility and our postsecondary educational institution, which specializes in pre-apprenticeship training, apprenticeship training and specialized utility task training for electric workers, as well as training for the gas distribution and communications industries; (ii) our portion of earnings of our unconsolidated integral affiliates, which includes, among others, our 50% equity interest in LUMA Energy, LLC (LUMA), a joint venture that was selected to operate, maintain, and modernize the approximately 18,000-mile electric transmission and distribution system in Puerto Rico; as well as our investment in a company that specializes in harvesting, treating and manufacturing wood utility poles and laminated wood products for utility and telecommunication companies; and (iii) financial results associated with our power transformer, circuit breaker and other manufacturing operations.

Business / Electric segment / training institution, specialized training and manufacturing operations · Filed 19/02/2026

We believe our reputation for safety leadership, responsiveness and performance, geographic reach, comprehensive service offerings and financial strength have resulted in strong relationships with numerous customers, and we endeavor to develop and maintain strategic alliances and preferred service provider status with our customers.

Business / management explanation of customer relationships and differentiation · Filed 19/02/2026

The following table reconciles total remaining performance obligations to our backlog (a non-GAAP financial measure) by reportable segment along with estimates of amounts expected to be realized within 12 months (in thousands): 12 Month 12 Month Electric Remaining performance obligations 14,188,737 21,638,080 10,297,410 15,654,028 Estimated orders under MSAs and short-term, non-fixed price contracts 7,755,355 14,528,626 6,198,603 12,973,779 21,944,092 36,166,706 16,496,013 28,627,807 Underground and Infrastructure Remaining performance obligations 1,518,060 2,124,934 953,983 1,104,609 Estimated orders under MSAs and short-term, non-fixed price contracts 2,404,135 5,684,768 2,321,941 4,806,408 3,922,195 7,809,702 3,275,924 5,911,017 Remaining performance obligations 15,706,797 23,763,014 11,251,393 16,758,637 Estimated orders under MSAs and short-term, non-fixed price contracts 10,159,490 20,213,394 8,520,544 17,780,187 25,866,287 43,976,408 19,771,937 34,538,824 The increases in both remaining performance obligations and backlog from December 31, 2024 to December 31, 2025 were partially due to the impact of acquisitions that occurred in the year ended December 31, 2025, as well as new project awards with existing customers.

MD&A / remaining performance obligations and backlog / awards with existing customers · Filed 19/02/2026

The increases in both remaining performance obligations and backlog from December 31, 2025 to June 30, 2026 were partially due to the impact of acquisitions that occurred in the six months ended June 30, 2026, as well as additional awards and increased volume with existing customers.

MD&A / backlog growth / additional awards and increased existing-customer volume · Filed 30/07/2026

Additionally, we have invested in domestic manufacturing capabilities for certain critical transmission and power generation components, including high- and low-voltage power transformers, and we have made strategic investments in other core utility infrastructure equipment, including utility poles.

Business / project materials / domestic manufacturing and supply-chain investments · Filed 19/02/2026

In addition, there are relatively few barriers to entry into some of the industries in which we operate and, as a result, organizations that have adequate financial resources and access to technical expertise may become a competitor.

Business / competition / relatively few entry barriers in some industries · Filed 20/02/2025

Furthermore, companies that we engage as subcontractors, including pursuant to certain regulatory and customer requirements, may develop the expertise necessary to compete with us with respect to the award of prime contracts from our customers.

Business / competition / subcontractors developing prime-contract capabilities · Filed 20/02/2025

Additionally, the in-house service organizations of our existing or prospective customers are capable of performing, or acquiring businesses that perform, the same types of services we provide, and these customers may also face pressure or be compelled by regulatory or other requirements to self-perform an increasing amount of the services we currently perform for them, thereby reducing the services they outsource to us in the future.

Risk factors / customer in-house capabilities and possible self-performance · Filed 19/02/2026

Furthermore, many of our customers may cancel or suspend our contracts on short notice even if we are not in default under the contract.

Risk factors / customer cancellation and suspension rights · Filed 19/02/2026

Under these agreements, our customers generally have no obligation to assign a specific amount of work to us.

Risk factors / MSAs without specified work obligations · Filed 19/02/2026

Quanta’s success depends on its ability to attract, develop and retain highly qualified employees, including craft skilled labor, engineers, project management, architects, designers, management and professional and administrative employees, and the industries in which Quanta operates have experienced shortages of qualified skilled labor personnel in recent years, which is expected to continue and potentially worsen in the future.

Commitments and contingencies / experienced industry skilled-labor shortages · Filed 19/02/2026

A significant portion of our revenues is currently derived from unit price or fixed price agreements, and price is often an important factor in the award of such agreements.

Business / competition / importance of price in contract awards · Filed 20/02/2025

However, customers often consider other factors in choosing a service provider, including technical expertise and experience, breadth of solutions offerings, safety ratings, financial and operational resources, geographic presence, industry reputation and dependability, which we expect to benefit larger service providers such as us.

Business / competition / non-price provider-selection factors · Filed 20/02/2025

The largest component of the decrease in the unapproved change orders and claims from December 31, 2025 to June 30, 2026 was related to approval by the customer of the balance associated with a large renewable transmission project in Canada.

Revenue recognition notes / customer approval of Canadian transmission-project claim balance · Filed 30/07/2026

As of June 30, 2026 and December 31, 2025, Quanta had recognized revenues of $411.1 million and $983.6 million related to unapproved change orders and claims included as contract price adjustments primarily in “Contract assets” in the accompanying condensed consolidated balance sheets.

Revenue recognition notes / recognized unapproved change orders and claims · Filed 30/07/2026

12 QUANTA SERVICES, INC. AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS - (Continued) (Unaudited) The following tables present Quanta’s revenue disaggregated by contract type and by geographic location, as determined by the job location (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 By contract type: Fixed price contracts $ 6,083,463 63.7 % $ 3,948,454 58.3 % $ 10,857,267 62.3 % $ 7,703,780 59.2 % Unit-price contracts 1,770,593 18.5 1,734,144 25.6 3,492,799 20.0 3,189,630 24.5 Cost-plus contracts 1,702,941 17.8 1,090,409 16.1 3,081,718 17.7 2,112,931 16.3 Total revenues $ 9,556,997 100.0 % $ 6,773,007 100.0 % $ 17,431,784 100.0 % $ 13,006,341 100.0 % Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 By primary geographic location: United States $ 9,103,463 95.2 % $ 6,279,010 92.8 % $ 16,465,073 94.5 % $ 12,067,063 92.9 % Canada 215,750 2.3 238,406 3.5 491,774 2.8 448,652 3.4 Australia 206,610 2.2 198,104 2.9 407,854 2.3 369,191 2.8 Others 31,174 0.3 57,487 0.8 67,083 0.4 121,435 0.9 Total revenues $ 9,556,997 100.0 % $ 6,773,007 100.0 % $ 17,431,784 100.0 % $ 13,006,341 100.0 % Under fixed-price contracts, as well as unit-price contracts with more than an insignificant amount of partially completed units, revenue is recognized as performance obligations are satisfied over time, with the percentage of completion generally measured as the percentage of costs incurred to total estimated costs for such performance obligation.

Financial statement notes / revenue by contract type / first-half 2026 fixed-price exposure · Filed 30/07/2026

For example, estimated costs for a performance obligation may increase from an original estimate, and contractual provisions may not allow for adequate compensation or reimbursement for such additional costs.

Revenue recognition notes / contractual limits on compensation for additional costs · Filed 19/02/2026

Three Months Ended June 30, Change 2026 2025 $ % Revenues $ 9,556,997 100.0 % $ 6,773,007 100.0 % $ 2,783,990 41.1 % Cost of services 8,011,819 83.8 5,765,433 85.1 2,246,386 39.0 % Gross profit 1,545,178 16.2 1,007,574 14.9 537,604 53.4 % Equity in earnings of integral unconsolidated affiliates 11,590 0.1 14,444 0.2 (2,854) (19.8) % Selling, general and administrative expenses (698,490) (7.3) (528,355) (7.8) (170,135) 32.2 % Amortization of intangible assets (156,957) (1.6) (113,178) (1.6) (43,779) 38.7 % Increase in fair value of contingent consideration liabilities (6,487) (0.1) (10,203) (0.2) 3,716 (36.4) % Operating income 694,834 7.3 370,282 5.5 324,552 87.6 % Interest and other financing expenses (73,548) (0.8) (59,579) (0.9) (13,969) 23.4 % Interest income 3,307 — 3,782 0.1 (475) (12.6) % Other (expense) income, net (7,430) — 4,138 — (11,568) (279.6) % Income before income taxes 617,163 6.5 318,623 4.7 298,540 93.7 % Provision for income taxes 157,584 1.7 85,100 1.3 72,484 85.2 % Net income 459,579 4.8 233,523 3.4 226,056 96.8 % Less: Net income attributable to non-controlling interests 8,198 0.1 4,273 — 3,925 91.9 % Net income attributable to common stock $ 451,381 4.7 % $ 229,250 3.4 % $ 222,131 96.9 % Revenues.

MD&A / second-quarter 2026 consolidated operating results and comparative margins · Filed 30/07/2026

While we attempt to structure our agreements with customers and suppliers to account for the impact of increased materials procurement requirements or fluctuations in the cost of materials we procure, our margins may be lower on projects where we furnish a significant amount of materials, as our markup on materials is generally lower than our markup on labor costs, and in a given period an increase in the percentage of work with greater materials procurement requirements may decrease our overall margins, including in some cases our assuming price risk.

MD&A / materials procurement / lower materials markups and price-risk exposure · Filed 30/07/2026

Net cash provided by operating activities 1,487,188 538,909 Net cash used in investing activities (1,358,812) (980,546) Net cash (used in) provided by financing activities (64,951) 186,747 Operating Activities Net cash provided by operating activities of $1.49 billion and $538.9 million in the six months ended June 30, 2026 and 2025 primarily reflected earnings adjusted for non-cash items and cash provided and used by the main components of working capital: “Accounts and notes receivable,” “Contract assets,”, “Inventories,” “Prepaid expenses and other current assets,” “Accounts payable and accrued expenses,” and “Contract liabilities.”

Liquidity and capital resources / first-half operating cash flow and working-capital contributions · Filed 30/07/2026

Accounts payable and accrued expenses, insurance and other non-current liabilities 883,976 64,539 700,152 (32,856) Other assets and liabilities, net (44,976) (18,971) Cash Flows from Investing Activities: Capital expenditures (451,048) (273,111) Proceeds from sale of and insurance settlements related to property and equipment 34,248 22,390 Cash paid for acquisitions, net of cash, cash equivalents and restricted cash acquired (930,311) (586,102) Investments in unconsolidated affiliates and other (26,634) (148,312) Other, net 14,933 4,589 Cash Flows from Financing Activities:

Cash flow statement / capital expenditures, acquisition cash spending and affiliate investments · Filed 30/07/2026

During the six months ended June 30, 2026, Quanta did not repurchase any shares of its common stock in the open market under its stock repurchase programs.

Equity note / absence of first-half 2026 open-market repurchases · Filed 30/07/2026

The consideration for the acquisition included approximately $1.26 billion in cash and 518,772 shares of Quanta common stock, which had a fair value of $218.8 million as of the acquisition date.

Acquisitions note / Dynamic Systems cash and share consideration · Filed 30/07/2026

v PROXY STATEMENT SUMMARY Elements of Executive Compensation Element and Form of Compensation Performance / Payment Criteria Purpose Base Salary Cash Individual performance and experience in the role are factors To provide fixed compensation necessary to attract and retain key executives, and offset variability that may impact performance-based compensation Short-Term Incentive Cash Tied to the achievement of performance targets related to (i) adjusted EBITDA; (ii) adjusted EBITDA margin; and (iii) safety performance To incentivize and reward achievement of annual financial and operational performance targets, which focus on profitable growth and safe execution Long-Term Incentive Performance Stock Units (“PSUs”) Cliff-vest at the end of a 3-year performance period Tied to the achievement of return on invested capital and cumulative adjusted earnings per share, as well as relative total stockholder return To incentivize achievement of our long-term financial performance targets that focus on strategic initiatives, including effective deployment of capital and earnings growth To align management and stockholder interests and to attract and promote retention of key executives Restricted Stock Units (“RSUs”) Vest over three years in equal annual installments To align management and stockholder interests and attract and promote retention of key executives Other Compensation Retirement Benefits and Perquisites Not applicable To maintain the health and safety of executives To provide a competitive compensation package and, in certain cases, optimize key executives’ time vi PROXY STATEMENT SUMMARY Compensation Governance We are committed to strong governance standards that ensure our executive compensation program is closely aligned with the interests of our stockholders and other stakeholders, as evidenced by the policies and practices described below.

Proxy compensation overview / annual incentive metrics and three-year PSU performance conditions · Filed 10/04/2026

As of December 31, 2025 all of our executive officers were in compliance with the requirements of our stock ownership guidelines and exceeded the prescribed ownership level.

Stock ownership guidelines / executive compliance and ownership at December 31, 2025 · Filed 10/04/2026

McCoy Corporate Secretary Houston, Texas April 10, 2026 89 APPENDIX A Reconciliation of Non-GAAP Financial Measures Adjusted EBITDA for 2025 Annual Incentive Plan For the Twelve Months Ended December 31, 2025 (In thousands) (Unaudited) Operating Income (GAAP as reported) $ 1,611,509 Depreciation expense 411,538 Amortization of intangible assets 498,795 Non-cash stock-based compensation 181,947 Interest, income taxes, depreciation and amortization included in equity in earnings of integral unconsolidated affiliates 28,014 Fair value adjustments to deferred compensation liabilities included within operating income 16,586 Deferred compensation supplemental death benefit 2,800 Dividend on cost method investment 3,989 Non-controlling interests (13,540 ) AIP EBITDA $ 2,741,638 Pre-approved adjustments related to operating activities affecting net income: Acquired businesses post acquisition results (116,976 ) Acquisition and integration costs(1) 94,109 Unforecasted healthcare expense 49,857 Increase in fair value of contingent consideration liabilities associated with acquired businesses(2) 31,203 Gains on sales of property and equipment (net of impairment charges and other costs associated with terminated activities) (4,996 ) Foreign currency exchange rate fluctuations (6,081 ) Other (1,347 ) Effect on EBITDA of iterative adjustment to final bonus attainment (394 ) AIP Adjusted EBITDA $ 2,787,013 (1) Amount includes $19.6 million that, pursuant to an acquisition purchase agreement, were or will be withheld from the sellers’ proceeds, to be paid to certain employees upon satisfaction of post-closing service obligations.

Appendix A / adjustments to EBITDA used for 2025 incentive compensation · Filed 10/04/2026

With respect to performance under the Company’s 2025 annual incentive plan, the overall achievement percentage was 126.8% of target performance, which was driven by significant year-over-year improvement and above-target performance with respect to the earnings- and margin-based performance metrics, partially offset by performance slightly below target with respect to the safety performance improvement metric.

Compensation discussion / actual 2025 incentive attainment and below-target safety improvement · Filed 10/04/2026

✓ Annual election of directors ✓ Majority voting standard for election of directors in uncontested elections ✓ Director resignation policy ✓ Holders of Quanta common stock vote as a single class on all matters ✓ Separate Independent Chairman of the Board and Chief Executive Officer ✓ Annual stockholder engagement ✓ Robust stock ownership requirements for directors and officers iii PROXY STATEMENT SUMMARY ✓ Meaningful annual limit on non-employee director compensation ✓ Code of Conduct that applies to all directors, officers and employees ✓ Robust oversight process of business strategy, risk management and corporate sustainability and responsibility matters ✓ Commitment to Board refreshment and composition aligned with the strategic direction of the Company Proposal 2: Advisory Vote to Approve Named Executive Officer Compensation The Board of Directors unanimously recommends a vote FOR the advisory resolution approving the compensation of Quanta’s named executive officers for fiscal year 2025.

Proxy governance summary / annual elections, voting standards and separate independent chair · Filed 10/04/2026

The Board has examined the composition of each standing committee and has determined that each member of these committees is “independent” within the meaning of SEC regulations, NYSE corporate governance listing standards and our Corporate Governance Guidelines.

Corporate governance / independence of standing committee members · Filed 10/04/2026

The Recovery Policy requires the Company to recoup certain excess incentive-based compensation (i.e., incentive compensation that is granted, earned or vested based in whole or in part on the attainment of one or more financial reporting measures) paid to or deferred by executive officers in the event the Company is required to prepare an accounting restatement due to material noncompliance with any financial reporting requirement under the federal securities laws.

Compensation governance / mandatory recovery of excess incentive compensation after qualifying restatements · Filed 10/04/2026

Each director attended greater than 75% of the meetings of the Board and the committees of the Board on which they served.

Corporate governance / actual director meeting attendance · Filed 10/04/2026

(NYSE: ITW) MasTec, Inc. (NYSE: MTZ) These companies were chosen based on (i) market competition, including companies that compete with Quanta for customers, executive talent and investors; (ii) organization size, with financial characteristics such as revenues or market capitalization similar to those of Quanta; and (iii) industry and business characteristics, including companies in similar industries and that serve similar customers, as well as companies with global scale, highly trained, specialized workforces and logistical complexity and companies

Compensation peer-group selection / competition for customers, executive talent and investors · Filed 10/04/2026

We believe continuing to develop these capabilities and make these investments can help alleviate certain of our customers’ supply chain constraints and improve and control project timelines, as well as potentially reduce exposure to changes in global trade relationships around such components.

Business / expected benefits of manufacturing and supply-chain investments · Filed 19/02/2026

Quanta completed three acquisitions in the first six months of 2026 and eight acquisitions during the full year 2025, and the results of the acquired businesses are included in Quanta’s

Earnings release / acquisitions included in consolidated results · Filed 30/07/2026

Weighted average basic shares outstanding 150,208 148,448 149,995 148,361 Weighted average diluted shares outstanding 152,439 150,923 152,289 150,937 Condensed Consolidated Balance Sheets (In thousands) ASSETS CURRENT ASSETS: Cash and cash equivalents 506,431 Accounts receivable, net Corporate and Non-Allocated Costs (b) (359,163 (3.8 )% (273,041 (4.0 )% (687,083 (3.9 )% (518,991 (4.0 )% Consolidated operating income 694,834 7.3 % 370,282 5.5 % 1,033,613 5.9 % 609,363 4.7 % Included in operating income for the Electric segment was equity in earnings of integral unconsolidated

Supplemental results / first-half consolidated operating income and comparative operating margins · Filed 30/07/2026

Publication history

Publication history
VersionUpdatedCompetitive advantage
519/10/2026uncertain
419/10/2026uncertain
318/10/2026uncertain
218/10/2026uncertain
118/10/2026Unavailable

Sources

Research methodology and limitations · What is an economic moat?