Investor Presentaiton

DEBT MATURITIES AND CAPITAL STRUCTURE Investment Grade With Opportunity to De-Lever Well positioned balance sheet with long-term capital structure at attractive interest rates Debt Maturities (1) Amounts shown in millions 2.90% Senior Notes $1,000 Term Loan Cash flow should provide the means to efficiently de-lever while continuing to deploy capital into strategic acquisitions, stock repurchases and our dividend program 0.95% Senior Notes 2.35% 3.05% $740 Senior Senior Notes Notes $500 $500 $500 QUANTA Maturity Date 2024 2026 2030 2032 2041 Path To De-Lever Establishes Long-Term Capital Structure (1) Excludes additional amounts borrowed under Quanta's senior credit facility, which matures in October 2026, amounts outstanding under its commercial paper program and approximately $143 million of certain other debt, including finance lease liabilities and rental purchase option liabilities, as well as the impact of approximately $23 million of expected unamortized financing costs. Excluding the impact of letters of credit, Quanta had approximately $230 million of revolving loans outstanding under Quanta's senior credit facility and $397 million of outstanding notes under its commercial paper program as of September 30, 2023. Page 42

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