Quanta Services builds, repairs, and maintains the infrastructure that moves electricity and energy across North America. It sends crews to string high-voltage transmission lines, construct wind and solar farms, modernize gas utility systems, and wire the inside of data centers. Customers, mostly large electric utilities, power developers, and technology companies, hire Quanta under long-term service agreements or project-by-project contracts, and Quanta gets paid when the work is done. Revenue comes from the sheer volume of projects completed across two segments: Electric Infrastructure Solutions, which covers the power grid and renewable energy, and Underground and Infrastructure, which covers gas pipelines and large industrial facilities. The diagram below traces where the money goes.
Five years of financial data tell a consistent story: this business is growing fast and converting more of that growth into usable cash every year. Revenue has risen from $13.0 billion in 2021 to $28.5 billion in 2025. That is more than a doubling in four years. Free cash flow, the money left over after the company pays for equipment and operations, has grown from $0.2 billion to $1.6 billion over the same period. That shift matters because it shows Quanta is not just getting bigger, it is getting better at turning projects into actual cash.
Operating cash flow followed the same path, rising from $0.6 billion in 2021 to $2.2 billion in 2025. Gross margin has stayed nearly flat across the entire five-year stretch, hovering between 14% and 15%. That steadiness is important. It means that even as Quanta takes on far more work, it is not sacrificing profit on each dollar of revenue to win contracts. The business is scaling without giving away margin.
That backlog figure is the most forward-looking signal in the filing. It represents work that customers have already committed to, or that Quanta expects to receive based on long-standing service agreements. A backlog nearly equal to one and a half years of current revenue suggests demand is not slowing. Remaining performance obligations alone, the firmest category of future work, rose 41.8% in a single year to $23.76 billion.
The debt picture is the one area that deserves careful attention. Net debt, meaning total borrowings minus cash on hand, fell from $3.5 billion in 2021 to $2.9 billion in 2023, suggesting the business was paying down obligations. But it has since risen to $5.6 billion by the end of 2025. That jump reflects deliberate spending: Quanta acquired Cupertino Electric for $1.5 billion in 2024, completed the acquisition of Dynamic Systems in 2025, and issued $1.5 billion of new senior notes in August 2025. The company is borrowing to buy capabilities, not to cover operating shortfalls. Still, higher debt means higher interest costs, and interest and other financing expenses rose from $202.7 million in 2024 to $261.4 million in 2025.
Quanta's risk profile is specific, not generic. The company works on electrical infrastructure in areas prone to wildfires, and the filing states plainly that if Quanta or its customers are found responsible for catastrophic wildfires, the resulting legal claims could be massive and might exceed insurance coverage. Wildfire insurance has become more expensive and harder to obtain, and Quanta self-insures a large portion of its risk through its own captive insurance company.
Fixed-price contracts present a second specific risk. A large share of Quanta's biggest projects are priced before the work begins. If costs run over, Quanta absorbs the loss, not the customer. The filing also discloses $983.6 million in unapproved change orders and claims as of December 31, 2025. These are amounts Quanta believes it is owed but has not yet collected. Resolving them takes time and legal effort, and full recovery is not guaranteed. A third risk is customer concentration: the ten largest customers account for 30% of total revenue, meaning a decision by even one major utility to reduce work could be felt across the income statement.
Technology and manufacturing customers, a category that includes data center operators and industrial facilities, now make up 13% of revenue, up from just 6% in 2023. That shift is one of the fastest-moving parts of the business right now. Quanta has explicitly positioned itself to wire data centers from the inside out, connecting them to the power grid and building the generation infrastructure they need. Whether that demand holds at its current pace is one of the central open questions facing the company.