Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE 24-02 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 FOURTH QUARTER AND FULL-YEAR 2023 RESULTS Full-Year 2024 Guidance Reflects Solid Growth in Revenues and Opportunity for Double-Digit Growth in Net Income, Adjusted EBITDA, Cash Flow From Operations and Earnings Per Share Fourth Quarter 2023 Results Include: • Consolidated Revenues of $5.78 ...