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Shares of Quanta Services (PWR) fell 11.7% on Wednesday, November 4, 2026, as the S&P 500 gained 1.6%. The company released no announcements, earnings reports or regulatory filings on the day of the move or the day before. The drop occurred on a day when data center stocks sank after Democrats secured big wins in the US midterm elections. So what does Quanta, whose foundation is its utility business, have to do with data centers?
How Does Quanta’s Work Reach Into Data Centers?
Quanta builds for data center customers alongside its work for utilities. Management said on the October 29 earnings call that the five largest technology companies will spend three times the capital budget of the utility side, adding that it likes Quanta’s chances to grow there.
Management also said on the same call that Quanta works for the very best in the world at data centers, and that it cannot take on even 25% to 30% of the work those customers have in front of it. That data center work connects Quanta to the stocks that sank on November 4. Even so, its utility business, which management put at roughly $20 billion of the electric segment, remains the base of the company.
Did Quanta Fall Alone Or With Similar Companies?
Quanta fell alongside its peers. Every company on its Trefis peer list dropped during the same session, and two of them posted steeper declines than Quanta did. MasTec fell 15.4%, and Primoris Services dropped 14.0%. EMCOR, MYR and Dycom Industries fell by less.
Broad industrial stocks held up far better. XLI, the SPDR fund for the industrials sector, slipped 1.1% during the session as the S&P 500 rose. The selling hit Quanta’s own group much harder than the wider sector.
Where Quanta Stock Stands Now
Quanta had not fallen this far in a single session at any point in the prior 365 days. Its latest move of this size went the other direction, logging a 17.3% rise on July 30, 2026.
If you have owned the stock for a year, you remain ahead of the market. Quanta shares returned 32.4% over the past twelve months, compared with 14.9% for the S&P 500. The trajectory has turned downward since spring, however. The stock hit its highest close of the past year at $785.24 on May 6, 2026. Shares have lost 26.1% since then, while the S&P 500 gained 5.0%. Over the past month, from the October 2 close, the stock fell 14.2%, against a 0.4% dip for the S&P 500. The latest close of $580.44 is still well above the year’s lowest close of $413.17 on January 8, 2026.
