Investor Presentaiton

ACQUISITION OF BLATTNER - STRATEGIC RATIONALE Premium Solutions Provider to the Renewable Energy Industry With A Market Leading Position & Attractive Financial Profile 1 Enhanced alignment with energy transition trends and access to the attractive wind, solar and energy storage markets, which are poised for significant decades-long growth as North America moves towards a reduced-carbon economy 2 Gives Quanta a leading position to collaborate with customers on their energy transition initiatives and to provide infrastructure solutions to the utility-scale renewable energy market and a strong platform to capitalize on long-term growth 3 4 Fits our strategy of delivering visible and recurring revenue and earnings through leveraging established relationships with customers, operational excellence and long-term growth outlook for renewable energy Experienced leadership team and strong cultural fit with Quanta - entrepreneurial mindset with shared focus on safety, quality and customer service BLATTNER COMPANY Acquired Oct. 2021 QUANTA 7 6 LO 5 Provides a technologically diverse, proven and successful "pure play" operator that is complementary to Quanta's industry leading Electric Power Infrastructure Solutions business Diversifies Quanta's customer base while creating new growth opportunities with existing customers. Blattner's strong and longstanding customer relationships are expected to drive ongoing and repeat business Expected to provide significant multi-year growth opportunities, enhanced cash flow conversion and highly visible backlog Enhances Quanta's already favorable ESG profile 00 Page 30

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