Quanta Services : August / September 2021 Investor Presentation

Investor

Presentation

August 10, 2021

Repeatable. Sustainable. RESILIENT

NOTICE TO INVESTORS

This presentation (and oral statements regarding the subject matter of this presentation) includes forward-looking statements intended to qualify under the "safe harbor" from liability established by the Private Securities Litigation Reform Act of 1995. These forward-looking statements include any statements reflecting Quanta's expectations, intentions, strategies, assumptions, plans or beliefs about future events or performance or that do not solely relate to historical or current facts. Forward-looking statements involve certain risks, uncertainties and assumptions that are difficult to predict or beyond Quanta's control, and actual results may differ materially from those expected, implied or forecasted by our forward-looking statements due to inaccurate assumptions and known and unknown risk and uncertainties. For additional information concerning some of the risks, uncertainties, assumptions and other factors that could affect our forward-looking statements, please refer to Quanta's Annual Report on Form 10-K for the year ended December 31, 2020, Quanta's Quarterly Reports on Form 10-Q for the quarters ended March 31, 2021 and June 30, 2021 and other documents filed with the Securities and Exchange Commission, which are available on our website (www.quantaservices.com), as well as the risks, uncertainties and assumptions identified in this presentation. Investors and analysts should not place undue reliance on Quanta's forward-looking statements, which are current only as of the date of this presentation. Quanta does not undertake and expressly disclaims any obligation to update or revise any forward-looking statements to reflect events or circumstances after the date of this presentation or otherwise, and Quanta expressly disclaims any written or oral statements made by any third party regarding the subject matter of this presentation.

Certain information may be provided in this presentation that includes financial measurements that are not required by, or presented in accordance with, generally accepted accounting principles (GAAP). These non-GAAP measures should not be considered as alternatives to GAAP measures, such as net income attributable to common stock and cash flow provided by operating activities, and may be calculated differently from, and therefore may not be comparable to, similarly titled measures used by other companies. For a reconciliation to the most directly comparable GAAP financial measures, please refer to the accompanying reconciliation tables.

The information contained in this document has not been audited by any independent auditor. This presentation is prepared as a convenience for securities analysts and investors and may be useful as a reference tool. Quanta may elect to modify the format or discontinue publication at any time, without notice to securities analysts or investors.

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KEY TAKEAWAYS

1	Quanta is a services company and the leading specialty infrastructure
solutions provider for the utility, communications and energy industries
2	We typically self-perform ~85% of our work, which we believe helps
mitigate project risks and ensures efficiency, safety and cost-certainty
	for our customers
3	Infrastructure opportunities are significant and sustainable. Quanta has
meaningful exposure to highly predictable, largely non-discretionary
	spend across multiple end-markets
4	Quanta is levered to favorable long-term trends such as utility grid
modernization, system hardening, renewables integration, electric
	vehicles, electrification, communications/5G and outsourcing
5	Our portfolio approach has resulted in a strong historical growth and
financial profile with continued opportunity for growth, improved

profitability and solid cash flow over a multi-year period

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WHO IS QUANTA SERVICES?

Leading Specialty Infrastructure Solutions Provider

Recognized market leader in the utility, communications and energy infrastructure industries

Est. more than 70% of 2021 revenues from regulated utilities

Entrepreneurial business model and culture

Largest and preferred employer of craft skilled labor in the industry. We typically self-perform~85% of our work - mitigates risk and provides cost certainty to customers

Strong scope and scale with deep customer relationships. Est. +90% of 2021 revenues from repeatable and sustainable activity

Industry leading safety and

training results	Strong financial
and programs	profile

Solid Performance	12%	+9%	+15%
Through the Cycle

2010 - 2020

Revenue	Adj. EBITDA(1)	Adj.
CAGR	CAGR	EPS(1)
		CAGR
		Page 4

(1) Refer to appendix for a reconciliation of this non-GAAP measure to its most directly comparable GAAP measure.

CORPORATE RESPONSIBILITY & SUSTAINABILITY

Quanta is Focused on Long-Term Corporate Responsibility and Sustainability

Quanta's sustainability mission centers on collaborating with our customers to meet their needs and creating value for stakeholders, while focusing on employee safety and conducting our business in a socially, economically and environmentally responsible manner

People	Planet		Principles
• Safety drives everything we do - our employees are our #1	• Many of the services we provide facilitate efficient	• Committed to strong corporate governance standards
asset	and safe delivery of clean energy and the migration	• Independent Chairman of the Board
• Have incrementally invested +$100mm in training and	towards a lower-carbon economy	• 30% female board members
	•	Annual election of directors, with five new directors
safety initiatives for our employees	• Quanta has an industry-leading reputation for
	added since 2016
• Job training for +13,000 people in Quanta training facilities	environmental stewardship during its projects
• 97% approval of executive compensation at 2021
in 2020	• We recognize the importance of minimizing our
	annual meeting
• +40,000 Quanta employees received safety training in 2020	environmental impact
• 20% of 2021 target annual cash incentive and 20% of
• Committed to compliance with environmental rules
• In response to COVID-19, provided +75K standard masks,		2021 target long-term equity incentive based on
+150K N95 masks and +20K gallons of sanitizer to	and regulations		achievement of quantifiable safety and sustainability
employees in the field in 2020	• Expect +90% of fleet will utilize GPS-based		performance goals
• Committed to diversity and inclusion and creating a work	technology for emissions, utilization and efficiency	•	Annual stockholder engagement
measurement and planning by the end of 2021	• Robust stock ownership requirements for directors
environment with equal opportunity for success
		and officers
• Committed to supporting the communities where we live
	• Board-level oversight of ESG-related matters
and work

Quanta's 2020 Corporate Responsibility Report

https://esg.quantaservices.com/

Quanta's MSCI ESG rating as of 2021. The use by Quanta of any MSCI ESG Research LLC or its affiliates ("MSCI") data, and the use of MSCI logos, trademarks, service marks or index names herein, do not constitute a sponsorship, endorsement, recommendation, or promotion of Quanta by MSCI. MSCI services and data are the property of MSCI or its information providers, and are provided 'as-is' and without warranty. MSCI names and logos are trademarks or service marks of MSCI.

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