Investor Presentaiton

CAUTIONARY STATEMENT ABOUT FORWARD-LOOKING STATEMENTS AND INFORMATION This presentation (and oral statements regarding the subject matter of this presentation) contains forward-looking statements intended to qualify for the "safe harbor" from liability established by the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements relating to the following: Projected revenues, net income, earnings per share, margins, cash flows, liquidity, weighted average shares outstanding, capital expenditures, interest rates and tax rates, as well as other projections of operating results and GAAP and non-GAAP financial results, including EBITDA, adjusted EBITDA and backlog; Expectations regarding Quanta's business or financial outlook; Expectations regarding opportunities, technological developments, competitive positioning, future economic and regulatory conditions and other trends in particular markets or industries, including with respect to Quanta's increased operations in the renewable energy market and the transition to a reduced-carbon economy; Expectations regarding Quanta's plans and strategies; The business plans or financial condition of Quanta's customers, including with respect to the transition to a reduced-carbon economy; Potential benefits from, and future financial and operational performance of, acquired businesses and investments; Beliefs and assumptions about the collectability of receivables; The expected value of contracts or intended contracts with customers, as well as the expected timing, scope, services, term or results of any awarded or expected projects; Possible recovery of pending or contemplated insurance claims, change orders and claims asserted against customers or third parties; The development of and opportunities with respect to future projects, including renewable energy projects and other projects designed to support transition to a reduced-carbon economy, electrical grid modernization, upgrade and hardening projects and larger transmission and pipeline projects; Expectations regarding the future availability and price of materials and equipment necessary for the performance of Quanta's business; The expected impact of global and domestic economic conditions on Quanta's business, financial condition, results of operations, cash flows and liquidity and demand for Quanta's services, including inflation, interest rates, recessionary economic conditions and commodity prices and production volumes; The expected impact of changes and potential changes in climate and the physical and transition risks associated with climate change and the transition to a reduced-carbon economy; Future capital allocation initiatives, including the amount and timing of, and strategies with respect to, any future acquisitions, investments, cash dividends, repurchases of equity or debt securities or repayments of other outstanding debt; The expected impact of existing or potential legislation or regulation; Potential opportunities that may be indicated by bidding activity or discussions with customers; The future demand for, availability of and costs related to labor resources in the industries Quanta serves; The expected recognition and realization of Quanta's remaining performance obligations and backlog; Expectations regarding the outcome of pending and threatened legal proceedings, as well as the collection of amounts awarded in legal proceedings; Expectations regarding Quanta's ability to reduce its debt or maintain its current credit ratings; and Other statements reflecting expectations, intentions, assumptions or beliefs about future events, and other statements that do not relate strictly to historical or current facts. These forward-looking statements are not guarantees of future performance; rather they involve or rely on a number of risks, uncertainties, and assumptions that are difficult to predict or are beyond our control, and reflect management's beliefs and assumptions based on information available at the time the statements are made. We caution you that actual outcomes and results may differ materially from what is expressed, implied or forecasted by our forward-looking statements and that any or all of our forward-looking statements may turn out to be inaccurate or incorrect. These forward-looking statements can be affected by inaccurate assumptions and by known or unknown risks and uncertainties including, among others: Market, industry, economic, financial or political conditions that are outside of the control of Quanta, including economic, energy, infrastructure and environmental policies and plans that are adopted or proposed by the U.S. federal and state governments or other governments in territories in which Quanta operates, inflation, interest rates, recessionary economic conditions, deterioration of global or specific trade relationships, and geopolitical conflicts and political unrest; Quarterly variations in operating and financial results, liquidity, financial condition, cash flows, capital requirements and reinvestment opportunities; QUANTA Page 55

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