Company: LGN
Filing Date: 2025-11-03
Form Type: DRS
Source: 0001193125-25-262782
Chunk: 339

Company: Legence Corp.
Filing Date: 2025-11-03
Form: DRS
Chunk 339
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 a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be     
 governed by the final adjudication of such issue.                                                                                                                                                                                                      |

| (b) | The undersigned registrant hereby undertakes that: |

| (1) | For purposes of determining any liability under the Securities Act of 1933, the information omitted from the                                                                                                                                         
 form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b) (1) or (4) or 497(h) under the Securities Act shall be deemed to be 
 part of this registration statement as of the time it was declared effective.                                                                                                                                                                        |

| (2) | For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment                                                                                                                                     
 that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. |

II-5

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: |     |                                               |
|     |     | Name: Jeffrey Sprau                           |
|     |     | Title:   Chief Executive Officer and Director |

Each person whose signature appears below appoints Jeffrey Sprau, Stephen Butz and Bryce Seki, and each of them, any of whom may act without joinder of the other, the individual’s true and lawful attorney-in-factand agent, with full power of substitution and resubstitution, for the person and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this registration statement (including post-effective amendments), and any registration statement (including any amendment thereto) for this offering that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act, and to file the same, with all exhibits thereto, and all other documents in connection therewith,