Quanta Services is trading 4.15% up at $569.10 amid broader-market gains, with no clear company-specific catalyst identified in available reports. - The supplied market context shows the S&P 500 and Nasdaq higher, with the Dow also up. - Quanta Services’ investor-relations page lists third-quarter results on October 29 as its next major event, rather than an announcement on October 26, 2026.