Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE 24-18 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 THIRD QUARTER 2024 RESULTS Third Quarter Consolidated Revenues of $6.5 Billion* Third Quarter GAAP Diluted EPS of $1.95* and Adjusted Diluted EPS of $2.72* Net Income Attributable to Common Stock of $293.2 Million* and Adjusted EBITDA of $682.8 Million* Year-to-Date Cash Flow From Operation ...