We provide mission-critical systems – HVAC systems and lighting, for example – in technically demanding buildings.

We are a leading provider of engineering, installation and maintenance services for mission-critical systems in buildings. We focus on high-growth sectors that have technically demanding buildings, including technology, life sciences, healthcare and education. We count more than 60% of the companies in the Nasdaq-100 Index as clients.

Our business is growing rapidly as data centers, manufacturers, pharmaceutical companies, hospitals, schools and universities make investments in both new and existing facilities to support growing demand for their products and services, reduce energy costs and increase resiliency. From 2021 to 2024, our revenues grew at a compound annual growth rate of approximately 39% and, after giving pro forma effect to acquisitions we made over that period, 16%. In 2024, we generated more than half of our revenues from “high growth industries,” which we define as clients operating in the data center and technology and life sciences and health care end-markets. As of June 30, 2025, we had $2.8 billion of backlog and awarded contracts, representing an increase of 29% over the same date last year.

We specialize in designing, fabricating and installing complex HVAC, process piping and other mechanical, electrical and plumbing (“MEP”) systems for new facilities and upgrading HVAC, lighting and building controls in existing facilities to make them more energy efficient and sustainable. In 2024, we generated 32.5% of our revenues from new building projects and 67.5% of our revenues from retrofits, upgrades and maintenance for existing buildings. Our team includes approximately 1,200 MEP engineers and energy consultants, and approximately 3,400 HVAC and plumbing service technicians, fitters, electricians and sheet metal workers, of which approximately 570 are responsible for providing maintenance services to over 5,900 clients. We completed more than 50,000 jobs each year for clients across the United States during the period from 2021 through 2024.

We operate through two complementary segments: Engineering & Consulting and Installation & Maintenance. Our Engineering & Consulting segment designs HVAC and other MEP systems for buildings, develops strategies to help reduce energy usage and make buildings more sustainable and provides program and project management services for clients’ installation and retrofit projects. From 2021 to 2024, our Engineering & Consulting segment revenues grew at a compound annual growth rate of approximately 83% and, after giving pro forma effect to acquisitions we made over that period, approximately 15%. We have completed over 30,000 jobs in our Engineering & Consulting segment since 2019. Our Engineering & Consulting segment generated 28.7% and 47.6% of our revenues and gross profit, respectively, in 2024.

(Note: Legence filed an S-1 for its IPO on Aug. 15, 2025, without disclosing the terms for its IPO. Estimated initial proceeds are $100 million.)