Company: LGN
Filing Date: 2025-12-09
Form Type: S-1
Source: 0001193125-25-312729
Chunk: 3

Company: Legence Corp.
Filing Date: 2025-12-09
Form: S-1
Chunk 3
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 and “Cautionary Note Regarding Forward-Looking Statements” contain additional information regarding these risks. i

COMMONLY USED DEFINED TERMS As used in this prospectus, unless the context indicates or otherwise requires, references to “LGN,” “Legence,” the “Company,” “we,” “us,” “our” and like terms are to Legence Corp., a Delaware corporation, and its wholly owned subsidiaries. In addition, the terms listed below have the following meanings:

| • |     | “Aggregators” refers to, collectively, Legence Parent and Legence Parent II. |

| • |     | “awarded contracts” refers to, as of any date of determination, the expected revenue values of                    
 projects awarded to us following a request for proposals but for which a formal contract has not yet been signed. |

| • |     | “backlog” refers to, as of any date of determination, the expected revenue values of the remaining 
 performance obligations under our contracted fixed-price projects.                                 |

| • |     | “Blackstone” or “Sponsor” refers to investment funds associated with Blackstone Inc. |

| • |     | “Blackstone Fund” refers to BX Refficiency Aggregator LP. |

| • |     | “Blocker Entities” refers to the entities that are taxable as corporations for U.S. federal tax 
 purposes through which certain of the Existing Owners indirectly hold LLC Interests.            |

| • |     | “Class A Common Stock” refers to the Class A common stock of Legence Corp., par value $0.01 
 per share.                                                                                  |

| • |     | “Class B Common Stock” refers to the Class B common stock of Legence Corp., par value $0.01 
 per share.                                                                                  |

| • |     | “client” refers to a company whose facility we are performing services in, whether they contract with 
 us directly or through an intermediary that subcontracts to us.                                       |

| • |     | “Common Stock” refers to, collectively, the Class A Common Stock and the Class B Common 
 Stock.                                                                                  |

| • |     | “Corporate Reorganization” has the meaning ascribed to it in “Presentation of Financial and 
 Operating Data.”                                                                            |

| • |     | “Credit Facilities” refers to, collectively, the Revolving Credit Facility, the Delayed Draw Term 
 Loan Credit Facility and the Term Loan Credit Facility.                                           |

| • |     | “customer” refers to a