Legence Corp. Class A Common stock (LGN) | The Buildout — AI Infrastructure

The Verdict

Legence is a mission-critical building-systems contractor. It designs the mechanical, electrical and plumbing systems for complex buildings, fabricates custom cooling modules off-site, installs the systems in the field, and then maintains them over the life of the building. Its customers sit in the sectors that are hardest to build for: data center and technology, life sciences and healthcare, education, and state and local government. For the AI build-out, Legence is a picks-and-shovels provider — it does not make chips or software, but it makes the cooling and mechanical systems that a data center or a semiconductor fab needs to run.

Earnings Beat

Legence reported Q2 2026 revenue of $1.262B, up 111% year over year and ahead of its own $1.05–$1.1B guide; excluding the Bowers acquisition, revenue grew nearly 60%. Gross margin was 14.4%, down from 21.5% a year earlier on a mix shift toward lower-margin installation work. The company highlighted record total backlog and awarded contracts of $5.67B, up 105% year over year.

Management tone: Between the Q1 and Q2 2026 calls, management's language stepped up. Demand went from "very robust" to "the momentum continues to increase… it's remarkable," and speed to market from a "healthy demand environment" to "a race to the finish line." Management gave specific, checkable numbers — fabrication square footage, headcount, leverage and award sizes — and beat its own quarterly guidance twice. It also disclosed the sustainability-consulting impairment and the reason for it, and declined to split the guidance raise rather than inventing a figure.

Management Guidance

Management guided Q3 2026 revenue to $1.225–$1.275B and adjusted EBITDA to $150–$160M, and raised full-year 2026 guidance to $4.7–$4.8B of revenue and $565–$585M of adjusted EBITDA. It said the raise reflects a growing backlog, current project-timing expectations and continued strong execution, with part of it accounting for second-quarter outperformance. For the second half it guided interest expense net of interest income to about $15M a quarter, Q3 D&A similar to Q2's $44M, and H2 capex of $40–$45M — an increase of $15–$20M over prior guidance, largely for fabrication capacity. FY2026 cash taxes were estimated at a mid-$50M range.

Trajectory

Revenue has more than doubled year over year for two straight quarters: $1.038B in Q1 2026 (+105%) and $1.262B in Q2 2026 (+111%), with nearly 60% of Q2 growth organic excluding Bowers. The mix is doing most of the work. Installation & Maintenance is now about 84% of revenue, up from roughly 71% a year earlier, and data center and technology was 62.0% of Q1 2026 revenue versus 39.6% a year before. That shift toward lower-margin installation work pulled gross margin down to 14.4% in Q2 2026 from 21.5% a year earlier, even as adjusted SG&A fell to 6.9% of revenue from 10.3%.

The Model

The model projects FY+1 revenue of $4.9B with EBITDA of $436M, an 8.9% margin, rising to FY+2 revenue of $6.35B with EBITDA of $635M, a 10.0% margin. The near-term anchor is the record $5.7B backlog and fabrication orders booked to the end of Q4 2028; the second year assumes that book converts into revenue and that margin widens about a point on continued fixed-cost leverage.

Projections are the median of 5 independent model runs. The model’s revenue sits 28.3% above analyst consensus.

Management guided Q3 2026 revenue to $1.225–$1.275B and adjusted EBITDA to $150–$160M, and raised full-year 2026 guidance to $4.7–$4.8B of revenue and $565–$585M of adjusted EBITDA. It said the raise reflects a growing backlog, current project-timing expectations and continued strong execution, with part of it accounting for second-quarter outperformance. For the second half it guided interest expense net of interest income to about $15M a quarter, Q3 D&A similar to Q2's $44M, and H2 capex of $40–$45M — an increase of $15–$20M over prior guidance, largely for fabrication capacity. FY2026 cash taxes were estimated at a mid-$50M range.

What Could Go Right — and Wrong

Looking Ahead

Over the next year the test is conversion. Legence has about 100,000 sq ft of fabrication capacity due online within weeks, orders booked to the end of Q4 2028, and a record backlog to work through, and management says it expects to keep expanding its labor force and grow backlog as the year progresses. The questions are whether record bookings convert to revenue on the timeline the new guidance implies, whether gross margin stabilizes as accretive fab-only work grows, and whether the 17.5% single-customer concentration eases.

Financials

Annual Summary

Key Ratios (Trailing)

The Company

Legence is an engineering, installation and maintenance contractor for mission-critical building systems. It designs the HVAC and other MEP — mechanical, electrical and plumbing — systems for technically demanding buildings, fabricates custom cooling modules off-site, installs them in the field, and maintains them afterward. Its end markets are the hard-to-build ones: data center and technology, life sciences and healthcare, education, and state and local government. In 2025 the company said more than half of its revenue came from what it calls "high growth industries," which it defines as data center and technology and life sciences and health care clients.

Legence runs two segments that span the value chain. Engineering & Consulting designs and manages projects; Installation & Maintenance fabricates, installs and then services the systems. Owning both lets the company engage a client early in design and then monetize the build and the ongoing service. It operates 1.5M sq ft of fabrication space after adding about 200,000 sq ft in Q2 2026, up from the more than 1.3M sq ft across six geographies the 10-K described, and that space includes an ISO Class 7 cleanroom. Headcount was close to 11,000 at the end of July 2026, including roughly 8,000 skilled technicians and craftspeople.

Business Segments

Competitive Landscape

Legence competes against a mix of national engineering firms and mechanical contractors. Its 10-K names Affiliated Engineers, Stantec and WSP Global as national competitors in Engineering & Consulting, and Comfort Systems USA, ACCO Engineered Systems and Southland Industries in Installation & Maintenance. Management points to scale and fabrication capacity as the edge, saying few competitors can take on the $100M-plus bookings that are now routine, and to a national, unionized, mobile labor model that lets it move crews to wherever the work is. A neighbor read-through shows Comfort Systems running materially more modular fabrication capacity than Legence, while Southland Industries is working through financial distress.

Supply Chain

Legence sits in the construction layer of the AI build-out, one step removed from the chipmakers. It buys cooling and electrical equipment from large vendors and installs it as working mission-critical systems. No neighbor transcript in the source material mentions Legence by name.