Company: LGN
Filing Date: 2025-12-09
Form Type: S-1
Source: 0001193125-25-312729
Chunk: 354

Company: Legence Corp.
Filing Date: 2025-12-09
Form: S-1
Chunk 354
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 |     | $ | 44,645 |
| Income taxes paid, net of refunds                                                           |     | $                       | 17,496 |     | $ | 10,160 |     | $ |    641 |
| Non-cash investing activities                                                               |     |                         |        |     |   |        |     |   |        |
| Property and equipment additions included in Accounts payable and Accrued and other current 
 liabilities                                                                                 |     | $                       |    429 |     | $ |    579 |     | $ |    439 |
| Non-cash financing activities                                                               |     |                         |        |     |   |        |     |   |        |
| Parent issuance of Parent interests for contingent consideration—related parties            |     | $                       |      — |     | $ |  9,325 |     | $ |  4,032 |
| Deferred offering costs included in Accounts payable                                        |     | $                       |  3,488 |     | $ |      — |     | $ |      — |

| (a) | The Company classifies the cash flows resulting from its interest rate swaps in Cash provided by operating                                                                                      
 activities on the Consolidated Statements of Cash Flows consistent with the interest that is hedged. See “Note 11—Derivatives” for additional information on the Company’s interest rate swaps. |

See “ Note 4—Acquisitions” for disclosure of non-cashfinancing of acquisitions through issuance of Parent interests and promissory notes. See “ Note 8—Leases” for supplemental disclosures of non-cashlease related information. Note 20—Subsequent Events The Company evaluated subsequent events through April 29, 2025, the date the Consolidated Financial Statements are available to be issued. Refer to “ Note 9—Debt” for subsequent term loan amendment. F-97

7,000,000 Shares Legence Corp. Class A Common Stock Prospectus Joint Lead Book-Running Managers

| Goldman Sachs & Co. LLC |     | Jefferies |

Co-Manager Blackstone Capital Markets , 2025

PART II INFORMATION NOT REQUIRED IN PROSPECTUS Item 13. Other Expenses of Issuance and Distribution.

|                                   |     | Amount to Be 
 Paid         |           |
|:----------------------------------|:----|:-------------|----------:|
| SEC registration fee              |     | $            |    50,105 |
| FINRA filing