Investor Presentaiton

CONSTRUCTION-LED INFRASTRUCTURE SOLUTIONS THROUGH PORTFOLIO APPROACH 48% Revenues - 2023E(1) Electric Power Infrastructure 29% Solutions Renewable Energy Infrastructure Solutions Underground 23% Utility & Infrastructure Solutions Transmission Distribution Substation Engineering Services Program Management Gas Distribution Pipeline Integrity Downstream Industrial Services + Energized Services Emergency Restoration Engineering Services Wind Storage Solar Storage Facilities Compression, Horizontal Metering & Pumping Directional Drilling Stations Program Management QUANTA DESIGN Smart Grid Communications ENGINEERING Transmission Substation PROJECT MANAGEMENT Pipeline Midstream Pipeline Mainline Pipeline INSTALLATION MAINTENANCE Logistics Management REPLACEMENT (1) Based on the midpoint of Quanta's 2023E financial outlook provided on November 2, 2023 Page 16

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