Quanta Services (PWR) Q3 2026 Earnings: Electric Organic Growth Near 39%

Quanta Services (PWR) Q3 2026 earnings showed organic growth of about 39% in its Electric segment and a segment operating margin of 12.6%. The company reported third-quarter 2026 (July-September) results on October 29, 2026 through its earnings release, Form 10-Q and earnings call, and growth, margins and cash flow all came in above the earlier comparison baselines [1][2][3].

Three questions framed the quarter: whether Electric could keep high organic growth and margins in the peak construction season, whether acquired mechanical businesses could lift margins in the Underground and Infrastructure segment, and whether the second-quarter cash collection advantage would hold. The Electric and cash flow questions were clearly confirmed. Underground and Infrastructure margin rose to 9.4%, but revenue of $2.215 billion came in slightly below the top of the expected range, and the disclosures do not isolate the core business's underlying growth [2]. Overall, Quanta's growth and profit conversion look stronger than at the second quarter, but third-quarter margins and cash flow include peak-season leverage and the timing of customer prepayments.

What Quanta Services does

Quanta builds and maintains power grids, generation interconnections and electrical and mechanical systems for utilities, power generators, large-load customers such as data centers, and gas and pipeline customers, and it self-performs about 85% of its work with its own crews [3]. In 2025, the Electric segment generated $23.001 billion of revenue, or 80.8% of the total [4]. The company bills by project progress and under service agreements, so profit depends on crew utilization, project execution and business mix.

Electric growth came mainly from organic demand

Electric segment revenue was $9.80 billion in the third quarter, up 58.8% year over year, including about $1.22 billion from acquired businesses [2]. On that basis, growth excluding acquisitions was about 39%, above the roughly 33% organic growth in the second quarter [5]. The company's own organic growth figure for this quarter could not be checked.

New awards continued to replace the work being converted into revenue. Total backlog reached $63.73 billion at September 30, about $10.3 billion more than at June 30 [1][6], and Electric 12-month backlog was $31.115 billion [1]. Management said the first part of the NiSource program has been booked, while large transmission projects in Texas and Ohio are expected to be booked in volume in the first half of 2027 [3]. Third-quarter growth therefore does not yet include those large projects.

Electric margin rose to 12.6%

The Electric segment's third-quarter operating margin was 12.6%, 1.2 percentage points higher than a year earlier, and segment operating income rose 75.9% [2]. The company attributed the improvement to higher revenue and better execution [2]. The CEO added that training for the large number of workers hired this year is starting to produce scale benefits and that offsite prefabrication is improving field efficiency [3].

The margin gain came from operations. Changes in estimates on fixed price contracts affected revenue by 1.1%, the same as a year earlier [2]. The CEO said utility work is held at 10%-12% margins by design, so the improvement comes from efficiency and mix in other businesses [3]. However, the company's full-year adjusted EBITDA guidance of $4.40-$4.49 billion, less $3.20 billion for the first nine months, implies about $1.20-$1.29 billion in the fourth quarter, below the third quarter's $1.45 billion [1]. That indicates the third-quarter margin includes peak-season leverage.

Peak-season cash flow extended the second-quarter improvement

Third-quarter operating cash flow was $1.454 billion and free cash flow was $1.199 billion, compared with $563 million and $438 million a year earlier [1]. Days sales outstanding (DSO), a measure of how quickly revenue turns into cash, was 50 days at September 30, versus 57 days at June 30 and 66 days a year earlier [7][2].

Customer prepayments offset an increase of about $1.5 billion in receivables during the quarter. Contract liabilities rose by about $1.28 billion in the third quarter, which the 10-Q attributes mainly to favorable billing terms on large projects [2]. The CFO said these terms come from mechanical, electrical and plumbing work, EPC (engineering, procurement and construction) work and renewables [3]. Unapproved change orders and claims stood at $488.4 million at September 30 and did not decline during the quarter, so the cash flow did not depend on claim recoveries [2].

The improvement has limits. Full-year operating cash flow guidance of $3.45-$4.00 billion, less $2.941 billion for the first nine months, implies about $0.51-$1.06 billion in the fourth quarter, well below the third quarter [1]. The CFO still frames long-term cash conversion at 55%-60% of adjusted EBITDA [3].

Conclusion

The report strengthens the case on growth, profit conversion and cash generation. Quanta raised full-year revenue guidance from $39.3-$39.7 billion to $41.3-$41.6 billion [8][1] and set free cash flow guidance at $2.50-$3.00 billion [1]. Backlog growth and the scale benefits of training look more durable, while peak-season leverage and large-project prepayments are timing factors; the company's own fourth-quarter guidance already implies lower profit and cash flow.

Three pieces of evidence matter next: how far Electric margins fall in the fourth quarter, how fast prepayments are consumed as shown by contract liabilities and DSO, and whether large transmission projects are booked in the first half of 2027. Management also noted that supply of copper, transformers and poles could constrain project timing [3].

Sources

[1] PWR 8-K filed 2026-10-29 · Q3 2026 earnings release, 2026-10-29, Quanta Services Form 8-K earnings release, https://www.sec.gov/Archives/edgar/data/1050915/000119312526436949/d77812dex991.htm [2] PWR 10-Q filed 2026-10-29 · Q3 2026, 2026-10-29, Quanta Services Form 10-Q quarterly report, https://www.sec.gov/Archives/edgar/data/1050915/000105091526000041/pwr-20260930.htm [3] PWR Q3 2026 earnings call 2026-10-29, 2026-10-29, Quanta Services earnings call [4] PWR 10-K filed 2026-02-19 · FY2025 segment results, 2026-02-19, Quanta Services Form 10-K annual report, https://www.sec.gov/Archives/edgar/data/1050915/000105091526000006/pwr-20251231.htm [5] PWR Q2 2026 Operational and Financial Commentary 2026-07-30 (company results supplement) · Electric segment commentary, 2026-07-30, Quanta Services results supplement, https://investors.quantaservices.com/_assets/_95becc6ca900e681cb865ad8da479315/quantaservices/db/917/10536/operational_and_financial_commentary/PWR+06-30-2026+ER+Operational+and+Financial+Summary+vF.pdf [6] PWR 8-K filed 2026-07-30 · backlog by segment at June 30 2026, 2026-07-30, Quanta Services Form 8-K earnings release, https://www.sec.gov/Archives/edgar/data/0001050915/000119312526324855/d56853dex991.htm [7] PWR 10-Q filed 2026-07-30 · H1 2026 operating cash flow and DSO, 2026-07-30, Quanta Services Form 10-Q quarterly report, https://www.sec.gov/Archives/edgar/data/1050915/000105091526000025/pwr-20260630.htm [8] PWR 8-K filed 2026-07-30 · raised full-year 2026 outlook, 2026-07-30, Quanta Services Form 8-K earnings release, https://www.sec.gov/Archives/edgar/data/0001050915/000119312526324855/d56853dex991.htm