Investor Presentaiton

WHO IS QUANTA SERVICES? Leading Specialty Infrastructure Solutions Provider 聰 Recognized market leader in the utility, renewable, communications and energy Growing Total Addressable Market (TAM) driven by megatrends with expanding market share across all three segments Largest and preferred employer of craft skilled labor in the industry. We typically self-perform +80% of our work - helps mitigate risk and provide cost certainty to customers BECAUSE WE CARE Industry leading safety and training results and programs infrastructure industries Entrepreneurial business model and culture Est. 74% of 2022 revenues from utilities and renewable energy developers Strong scope and scale with deep customer relationships. Est. ~90% of 2022 revenues from repeatable and sustainable activity QUANTA Strong financial profile ~14% +12% ~18% 2010-2022 (1) Refer to appendix for a reconciliation of this non-GAAP financial measure to its most directly comparable GAAP measure. Revenue CAGR Adj. EBITDA (1) CAGR Adj. EPS (1) CAGR Page 4

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