The competition between Quanta Services, Inc. and MasTec, Inc. underscores the different paths available in the infrastructure sector, especially as demand for AI-driven data centers and renewable energy rises. Both companies are positioned to benefit from long-term infrastructure investments, but they present distinct investment profiles based on growth momentum, valuation, and earnings visibility.
Quanta Services: A Strong Foundation for Future Growth
Quanta Services, a leader in electric power and utility infrastructure solutions, has secured a stable market position through its diverse operations in transmission and distribution, grid hardening, and renewable integration. As of March 31, 2026, Quanta reported a record backlog of $48.5 billion, which includes a 12-month backlog of $28.2 billion and remaining performance obligations of $26.2 billion. This substantial backlog clearly indicates the company’s strong growth potential in the years ahead.
The company attributes its growth to the increasing demand for data centers driven by AI-related power needs and expanding utility investments. Quanta’s ability to perform 80-85% of its work in-house enhances its operational control and reduces reliance on subcontractors, positioning the company to effectively manage large-scale projects.
Moreover, Quanta is investing significantly in its vertical supply chain, planning to allocate between $500 million and $700 million to boost transformer manufacturing capacity and expand off-site facilities. This strategy aims to double their current transformer manufacturing capacity and significantly enhance their fabrication and logistics capabilities.
Management has set ambitious goals to more than double adjusted earnings per share (EPS) by 2030, targeting a growth rate of 15-20%. With a total addressable market estimated at $2.4 trillion through 2030, Quanta's long-term outlook looks promising.
MasTec: Riding the Waves of Diverse Infrastructure Demand
On the other hand, MasTec has benefited from the multiyear infrastructure cycle, particularly in communications, power delivery, and clean energy. The company's first-quarter backlog reached a record $20.3 billion, reflecting a 28% year-over-year increase, supported by a book-to-bill ratio of 1.4x. This diverse portfolio reduces reliance on a single market, providing a buffer against demand fluctuations.
With rising data consumption and ongoing government funding for broadband initiatives, MasTec is well-positioned to capture growth in fiber deployment and data centers. Recently, the company raised its 2026 revenue guidance to approximately $17.5 billion, signaling confidence in its operational execution and backlog conversion.
However, MasTec faces challenges, including project timing variability and potential cash flow constraints due to inflation and political factors. The company’s operations are also heavily influenced by government policy, especially in renewable energy, which adds uncertainty to its project pipeline.
Performance Comparison and Investment Outlook
In terms of stock performance, Quanta has experienced a lackluster year-to-date performance compared to MasTec, although both companies outperform the broader construction sector. Historically, Quanta has traded at a premium valuation relative to MasTec, reflecting its slower growth trend but stronger profitability metrics.
Current Zacks Consensus Estimates indicate that Quanta’s earnings for 2026 and 2027 are expected to grow by 29.8% and 17.5%, respectively. In comparison, MasTec's estimates suggest higher growth rates of 35.3% and 32.8% for the same periods. Despite these promising figures, Quanta’s return on equity (ROE) of 20.5% exceeds MasTec's, demonstrating Quanta’s efficiency in delivering shareholder returns.
As investors consider their options, Quanta’s strong operational control, larger backlog, and higher profitability metrics suggest it is the more balanced choice for those seeking stability in a growing market. Meanwhile, MasTec may attract more aggressive investors willing to embrace the volatility that comes with its faster growth trajectory and discounted valuation.
Both Quanta and MasTec are poised to thrive in an expanding infrastructure market, yet their differing approaches and market exposures create unique opportunities and risks for potential investors. Quanta, with its focus on utility infrastructure, makes a solid case for long-term investment stability, while MasTec offers a more dynamic growth profile that may entice those looking for rapid expansion.
The stories that move AI & crypto markets — before the market reacts.
Free. 7am ET. Five stories. 62,400 readers.
