Quanta Services Investor Presentation — February 2020

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E a r n i n g s C a l l P r e s e n t a t i o n

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Thispresentation (and oralstatements regarding thesubject matter ofthispresentation) includes forward -looking statements

intended toqualify under the“safe harbor” from liability established bythePrivate Securities Litigation Reform Actof1995.

These forward -looking statements include any statements reflecting Quanta's expectations, intentions, strategies,

assumptions, plans orbeliefs about future events orperformance orthatdonotsolely relate tohistorical orcurrent facts.

Forward -looking statements involve certain risks, uncertainties andassumptions thataredifficult topredict orbeyond Quanta's

control, andactual results maydiffer materially from those expected, implied orforecasted byourforward -looking statements

duetoinaccurate assumptions andknown andunknown riskanduncertainties .Foradditional information concerning some of

therisks, uncertainties, assumptions andother factors thatcould affect ourforward -looking statements, please refer to

Quanta’s most recently filedAnnual Report onForm 10-K,recently filedQuarterly Reports onForm 10-Qandother documents

filedwiththeSecurities andExchange Commission, which areavailable onourwebsite (www .quantaservices .com), aswellas

therisks, uncertainties andassumptions identified inthispresentation .Investors andanalysts should notplace undue reliance

onQuanta’s forward -looking statements, which arecurrent only asofthedate ofthispresentation .Quanta does not

undertake andexpressly disclaims anyobligation toupdate orrevise anyforward -looking statements toreflect events or

circumstances after thedateofthispresentation orotherwise, andQuanta expressly disclaims anywritten ororalstatements

made byanythird party regarding thesubject matter ofthispresentation .

Certain information maybeprovided inthispresentation thatincludes financial measurements thatarenotrequired by,or

presented inaccordance with, generally accepted accounting principles (GAAP) .These non-GAAP measures should notbe

considered asalternatives toGAAP measures, such asnetincome andcash flowprovided byoperating activities, andmaybe

calculated differently from, andtherefore maynotbecomparable to,similarly titled measures used atother companies .Fora

reconciliation tothemost directly comparable GAAP financial measures, please refer toQuanta’s fourth quarter andfullyear

2019 earnings release available atwww.quantaservices .comandtheappendix ofthispresentation .

Theinformation contained inthisdocument hasnotbeen audited byanyindependent auditor .Thispresentation isprepared