Data center growth brings real concentration risk
- Legence is a mission-critical building systems contractor, not a software or chip company.
- Data centers and technology reached 62.0% of Q1 2026 revenue, up from 42.7% in 2025.
- Total backlog was $4.2 billion at March 31, 2026, with backlog plus awarded contracts at $5.4 billion.
- The business mix has swung toward new buildings, which were 60.5% of Q1 2026 revenue.
- The main question is whether data center demand stays hot long enough for Legence to turn backlog into profit.
Backlog is booming, but narrow
The bull case is simple. Big technology companies are building data centers, AI facilities, and other hard-to-run buildings. Legence sells the engineering, fabrication, installation, and service work that those buildings need. That demand pushed total backlog to $4.2 billion at March 31, 2026. Backlog plus awarded contracts reached $5.4 billion.
Legence also has a more specialized growth angle. Management said direct liquid-to-chip cooling, a way to move heat away from powerful computer chips, helped drive Installation & Maintenance growth in 2025. The company also said it was discussing data center deliveries that extend into 2029, which gives some future revenue visibility if those jobs become signed work.
The bear case is concentration. Data centers and technology were 62.0% of Q1 2026 revenue, up from 42.7% in 2025. That is a major shift in a short time. If large tech companies slow capital spending, delay data center projects, or change cooling designs, Legence could feel it quickly.
The near-term catalyst is execution. Investors should watch whether Legence converts the $4.2 billion backlog into revenue and cash, while also fitting Bowers and Metrix into the business without losing margin control. The opportunity is large, but the company is now tied closely to one customer spending cycle.
Complex building work, paid by projects
Legence makes money by designing, building, and maintaining the systems inside demanding buildings. These systems include HVAC, process piping, electrical, plumbing, controls, and cooling equipment. The clients include technology companies, life sciences and healthcare customers, education clients, and public sector institutions.
Many jobs are fixed-price projects. That means Legence can earn more if it estimates labor and materials well, but can lose margin if a job takes more hours or parts than expected. Its largest expense is wages and salaries, so labor planning matters a lot.
The business has two sides. Engineering & Consulting usually carries higher margins because it sells design, planning, consulting, and project management. Installation & Maintenance is much larger and is growing faster, but installation and fabrication work can be lower margin and more exposed to equipment, subcontractor, and labor costs.
The building mix changed fast in Q1 2026. New buildings were 60.5% of revenue, while existing buildings were 39.5%. That helps when data center construction is strong, but it also raises exposure to project timing, construction cycles, and customer budget pauses.
What Legence actually sells
Engineering & Design
Legence plans and designs HVAC, process piping, and other mechanical, electrical, and plumbing systems. This work can support both new buildings and upgrades to existing ones.
Program & Project Management
The company manages large retrofit and installation projects for clients. Some work uses energy savings performance contracts, where upgrades are tied to future utility savings.
Installation & Fabrication
This is the largest service line in Q1 2026. It includes installation of HVAC, electrical, plumbing, process, and control systems, plus customized fabrication for technical buildings.
Direct liquid-to-chip cooling fabrication
Legence fabricates cooling systems that move heat directly away from high-power chips. Management said this demand helped drive growth from data center and technology clients.
Maintenance & Service
Legence provides preventive maintenance, emergency repair, and break-fix work over the life of a building. These jobs can be steadier than new construction and may run under annual or longer-term agreements.
Energy analysis and building controls
The company also helps buildings use less energy and run more reliably through controls, automation, testing, and optimization. This can matter even when clients slow new construction.
Two segments, one big engine
Segment shares are from revenue for the three months ended March 31, 2026. Installation & Maintenance was 84.0% of revenue, so Legence is now heavily shaped by project execution and data center build-outs.
What could break the story
Tech capex pause
High impact · Medium oddsData centers and technology were 62.0% of Q1 2026 revenue. If major technology clients delay data center builds, reduce AI infrastructure budgets, or stretch project schedules, Legence could see slower bookings and lower revenue growth. This is the clearest risk because the same end market that is driving backlog is also increasing concentration.
Backlog does not turn into profit
High impact · Medium oddsBacklog is not the same as earnings. Legence still has to staff projects, buy equipment, manage subcontractors, and finish work on budget. Q1 2026 gross margin was lower than the prior-year period because the mix shifted and some higher-cost items rose.
Labor and subcontractor cost squeeze
High impact · Medium oddsLegence says wages and salaries are its largest expense. Many customer contracts are fixed price, so cost overruns can hurt margins. Subcontractor and equipment expenses also matter because the company buys and installs items such as chillers, pumps, valves, switchgear, steel, and aluminum.
New construction cycle turns
Medium impact · Medium oddsNew buildings were 60.5% of Q1 2026 revenue, a big change from 2025 when Legence said about 40% of revenue came from new building projects. New construction can be more sensitive to rates, customer budgets, and permitting delays. A weaker commercial construction market could reduce project starts.
Acquisition integration risk
Medium impact · Medium oddsLegence completed the Bowers acquisition on January 2, 2026 and acquired Metrix Engineers on March 1, 2026. Bowers expands its exposure to Northern Virginia and DC data center and government markets. If these deals are not integrated well, Legence could face extra costs, weaker controls, or missed margin targets.
In one breath
What does Legence do?
Legence designs, installs, fabricates, and maintains complex systems inside buildings. Its work includes HVAC, process piping, electrical, plumbing, controls, and cooling systems for data centers, labs, hospitals, schools, and public buildings.
Why is LGN tied to data centers?
Data centers need advanced power, cooling, and mechanical systems to run safely. Legence has grown with that demand, and data centers and technology reached 62.0% of Q1 2026 revenue.
Is Legence a recurring revenue business?
Only partly. Maintenance and service work can repeat over time, but a large share of revenue comes from installation and fabrication projects. That means backlog, project timing, and job margins are very important.
What is the main risk for Legence stock?
The main risk is a slowdown in technology infrastructure spending. If data center customers pull back, Legence could see weaker bookings, lower backlog growth, and pressure on revenue.