Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE 24-06 Contacts: Jayshree Desai, CFO Media – Liz James Kip Rupp, CFA, IRC - Investors FGS Global Quanta Services, Inc. (281) 881-5170 (713) 629-7600 QUANTA SERVICES REPORTS FIRST QUARTER 2024 RESULTS First Quarter Consolidated Revenues of $5.03 Billion* First Quarter GAAP Diluted EPS of $0.79 and Adjusted Diluted EPS of $1.41* Net Income Attributable to Common Stock of $118.4 Million and Adjusted EBITDA of $387.3 Million* Cash Flow From Operations of $238.0 Mi ...