Company: LGN
Filing Date: 2025-08-25
Form Type: S-1/A
Source: 0001193125-25-186788
Chunk: 118

Company: Legence Corp.
Filing Date: 2025-08-25
Form: S-1/A
Chunk 118
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 facilities supporting life sciences research and development, pharmaceutical manufacturing and 
 healthcare facilities providing inpatient and outpatient health services.                               |

| (4) | Includes kindergarten through twelfth grade education facilities, as well as colleges, universities and 
 research facilities.                                                                                    |

| (5) | Includes buildings or complexes combining commercial and retail. |

| (6) | Includes facilities owned or operated by state and municipal government agencies to the extent not otherwise 
 included in the education client end market.                                                                 |

| (7) | Includes a variety of other industries such as precision manufacturing, aerospace & defense, energy,                                                                                                                                
 agriculture, multi-family, hospitality & entertainment, among others, as well as the federal government. Revenues from the federal government were approximately 2% of revenues in 2024 and for the six months ended June 30, 2025. |

Business Segments We operate through two segments: Engineering & Consulting and Installation & Maintenance. Engineering & Consulting 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. Our Engineering & Consulting segment has two principal service offerings:

| • |     | Engineering & Design. We provide planning, design and engineering services for                                                                                                                                                                    
 HVAC, process piping and other MEP systems in both new and existing buildings. We also develop strategies for building owners and operators to help reduce their utility consumption and make their operations more sustainable and resilient. We 
 generated approximately 58% of our 2024 Engineering & Consulting segment revenues from selling Engineering & Design services.                                                                                                                     |

81

| • |     | Program & Project Management. We provide comprehensive program and project                                                                                                                                                                             
 management services, including facility condition and operational assessments, space utilization and capacity analyses, funding source identification and construction management. For certain clients, we provide design-build services through ESPCs 
 for building retrofits. Under ESPC contracts, financing sources provide the funds required to pay us for the upgrades and receive a portion of the client’s energy savings to recoup their investment and generate a return. We generated              
 approximately 42% of our 2024 Engineering & Consulting segment revenues from selling Program & Project Management services.                                                                                                                            |

Installation & Maintenance Our Installation & Maintenance segment fabricates and installs HVAC systems, process piping and other MEP systems in new and existing industrial, commercial and institutional buildings and provides ongoing preventative and corrective maintenance services for those systems. Our Installation & Maintenance segment has two principal service offerings: