Company: LGN
Filing Date: 2025-09-02
Form Type: S-1/A
Source: 0001193125-25-193346
Chunk: 364

Company: Legence Corp.
Filing Date: 2025-09-02
Form: S-1/A
Chunk 364
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 be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:                           |

| (i) | Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be 
 filed pursuant to Rule 424;                                                                                    |

| (ii) | Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or 
 used or referred to by the undersigned registrant;                                                             |

| (iii) | The portion of any other free writing prospectus relating to the offering containing material information about 
 the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and        |

| (iv) | Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser. |

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SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on September 2, 2025.

| By: |     | /s/ Jeffrey Sprau                    |
|     |     | Jeffrey Sprau                        |
|     |     | Chief Executive Officer and Director |

Pursuant to the requirements of the Securities Act, this registration statement has been signed below by the following persons in the capacities and the dates indicated.

| Signature                   
 /s/ Jeffrey Sprau           
 Jeffrey Sprau               
 /s/ Stephen Butz            
 Stephen Butz                |     | Title                                
 Chief Executive Officer and Director 
 (Principal Executive Officer)        
 Chief Financial Officer              
 (Principal Financial Officer)        |     | Date              
 September 2, 2025 
 September 2, 2025 |
|:----------------------------|:----|:-------------------------------------|:----|:------------------|
| /s/ Philippe Le Bris        
 Philippe Le Bris            |     | Chief Accounting Officer             
 (Principal Accounting Officer)       |     | September 2, 2025 |
| /s/ Bilal Khan              
 Bilal Khan                  |     | Director                             |     | September 2, 2025 |
| /s/ Robert Mitchell Nimocks 
 Robert Mitchell Nimocks     |     | Director                             |     | September 2, 2025 |

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