Exhibit 99.1 FOR IMMEDIATE RELEASE 25-05 Repurchased Approximately 135MillionofitsOutstandingCommonStock∣Contacts:∣JayshreeDesai,CFO∣Media–NoaSchwartz∣∣−−−∣−−−∣−−−∣∣∣KipRupp,CFA,IRC−Investors∣FGSGlobal∣∣∣QuantaServices,Inc.∣(310)405−4312∣∣∣(713)629−7600∣∣QUANTASERVICESREPORTSFIRSTQUARTER2025RESULTSFirstQuarterConsolidatedRevenuesof6.2 Billion* First Quarter GAAP Diluted EPS of 0.96∗andAdjustedDilutedEPSof1.78* Net Income Attributable ...