Company: LGN
Filing Date: 2025-07-15
Form Type: DRS/A
Source: 0000950123-25-006399
Chunk: 3

Company: Legence Corp.
Filing Date: 2025-07-15
Form: DRS/A
Chunk 3
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 Transactions                    |     |      | 149 |
| Description of Capital Stock                                            |     |      | 153 |
| Shares Eligible for Future Sale                                         |     |      | 160 |
| Material U.S. Federal Income Tax Considerations for Non-U.S. Holders    |     |      | 162 |
| Underwriting                                                            |     |      | 167 |
| Legal Matters                                                           |     |      | 175 |
| Experts                                                                 |     |      | 176 |
| Where You Can Find More Information                                     |     |      | 177 |
| Index to Financial Statements                                           |     |      | F-1 |

Neither we nor the underwriters have authorized anyone to provide you with any information or to make any representations other than those contained in this prospectus, any amendment or supplement to this prospectus or in any free writing prospectus prepared by us or on our behalf. We and the underwriters take no responsibility for, and can provide no assurance as to the reliability of, any information other than the information in this prospectus and any free writing prospectus prepared by us or on our behalf. You should not assume that the information contained in this prospectus is accurate as of any date other than the date on the front cover of this prospectus. Our business, financial condition, results of operations and prospects may have changed since such dates. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where an offer or sale is not permitted. Through and including , 2025 (the 25th day after the date of this prospectus), all dealers effecting transactions in our shares, whether or not participating in this offering, may be required to deliver a prospectus. This requirement is in addition to the dealers’ obligation to deliver a prospectus when acting as an underwriter and with respect to an unsold allotment or subscription. This prospectus contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” contain additional information regarding these risks. i

Confidential Treatment Requested by Legence Corp. Pursuant to 17 C.F.R. Section 200.83 COMMONLY USED DEFINED TERMS As used in this prospectus, unless the context indicates or otherwise requires, the terms listed below have the following meanings:

| • |     | “Aggregator I” refers to Legence Parent LLC, a