26-14 Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Jayshree Desai, CFO Media – Mili Gosar Kip Rupp, CFA, IRC - Investors FGS Global Sean Eastman - Investors (832) 640-7570 Quanta Services, Inc. (713) 629-7600 QUANTA SERVICES REPORTS SECOND QUARTER 2026 RESULTS Second Quarter Consolidated Revenues of $9.6 Billion* Second Quarter GAAP Diluted EPS of $2.96* and Adjusted Diluted EPS of $4.24* Net Income Attributable to Common Stock of $451.4 Million* Adjusted EBITDA of $1.1 Billion* Cash Flow From ...