Investor Presentaiton

UNDERGROUND UTILITY & INFRASTRUCTURE SOLUTIONS Strategic Focus on Base Business Strategy Create a more sustainable and consistent operation Increase and gain scale of base business services Services and geographic diversity Opportunistic pursuit of larger pipeline projects that meet our risk and margin parameters Focus Services Gas LDC (1) Steps Taken Organic expansion of gas utility services Expectations 2023E Underground Utility & Infrastructure Solutions Segment Revenues • Pipeline Integrity Acquisition of Hallen Construction in 2019 (gas utility services) ~80% Total Revs. -20% ~$4.75B (2) • Organic expansion of • pipeline integrity services Acquisition of Stronghold in 2017 (industrial services) Base Business Revenues Larger Project Revenues Downstream Industrial Services QUANTA (1) LDC Local Distribution Company (2) Based on the midpoint of Quanta's 2023E financial outlook provided on November 2, 2023 ~60% Total Revs. ~$4.75B (2) -40% Focus Services Revenues Remaining Services Revenues Page 34

View entire presentation