Company: LGN
Filing Date: 2025-04-30
Form Type: DRS/A
Source: 0000950123-25-003868
Chunk: 323

Company: Legence Corp.
Filing Date: 2025-04-30
Form: DRS/A
Chunk 323
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 to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was     
 made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.                                                                                    |

| (4) | That, for the purpose of determining liability under the Securities Act to any purchaser in the initial                                                                                                                                              
 distribution of the securities, in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are 
 offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will 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. |

II-4

Confidential Treatment Requested by Legence Corp. Pursuant to 17 C.F.R. Section 200.83 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 , 2025.

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

Each person whose signature appears below appoints Jeffrey Sprau and Stephen Butz, and each of them, any of whom may act without the joinder of the other, as his or her true and lawful attorneys in fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign