Exhibit 99.1 FOR IMMEDIATE RELEASE 26-02 Contacts: Jayshree Desai, CFO Media – Noa Schwartz Kip Rupp, CFA, IRC - Investors FGS Global Quanta Services, Inc. (310) 405-4312 (713) 629-7600 QUANTA SERVICES REPORTS FOURTH QUARTER AND FULL-YEAR 2025 RESULTS Full-Year 2026 Guidance Reflects Double-Digit Growth in Revenues, Net Income and Adjusted EBITDA Full-Year 2026 Guidance Range Reflects Opportunity to Deliver Over 20% EPS Growth Expect to Achieve Record Backlog in 2026 Fourth Quarter 2025 Results Include: Ful ...