Fontheim International built a business in the awkward space between a boardroom promise and the people expected to believe it. Its most revealing work begins when a policy problem has become a trust problem.
Legence is North America's largest pure-play building performance platform, providing integrated advisory, engineering, design, fabrication, installation, and maintenance services for high-performance and mission-critical facilities. Formerly Therma Holdings and backed by Blackstone, the company brands itself the world's first Energy Transition Accelerator, helping data centers, healthcare, education, biopharma, semiconductor, and commercial real estate clients cut carbon, lower utility costs, and run buildings more efficiently. Legence went public on Nasdaq under the ticker LGN in September 2025.