Company: LGN
Filing Date: 2025-08-25
Form Type: S-1/A
Source: 0001193125-25-186788
Chunk: 100

Company: Legence Corp.
Filing Date: 2025-08-25
Form: S-1/A
Chunk 100
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| • |     | the expected impact of existing or potential legislation or regulation; |

| • |     | the future demand for, availability of and costs related to labor resources in the industries we serve; |

| • |     | the expected recognition and realization of our remaining performance obligations or backlog; |

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| • |     | credit markets; |

| • |     | our pending legal matters; and |

| • |     | our plans, objectives, expectations and intentions contained in this prospectus that are not historical. |

We caution you that these forward-looking statements are subject to all of the risks and uncertainties incident to the business in which we operate, most of which are difficult to predict and many of which are beyond our control. These risks include, but are not limited to, the risks described under “Risk Factors.” Should one or more of the risks or uncertainties described in this prospectus occur, or should underlying assumptions prove incorrect, our actual results and plans could differ materially from those expressed in any forward-looking statements. All forward-looking statements, expressed or implied, included in this prospectus are expressly qualified in their entirety by this cautionary statement. This cautionary statement should also be considered in connection with any subsequent written or oral forward-looking statements that we or persons acting on our behalf may issue. Except as otherwise required by applicable law, we disclaim any duty to update any forward-looking statements, all of which are expressly qualified by the statements in this section, to reflect events or circumstances after the date of this prospectus. 63

USE OF PROCEEDS

We expect to receive approximately $ million (or approximately $ million if the
underwriters exercise in full their option to purchase additional shares of Class A Common Stock) of net proceeds from the sale of the Class A Common Stock offered by us based upon the assumed public offering price of
$ per share of Class A Common Stock (the midpoint of the price range set forth on the cover page of this prospectus), after deducting underwriting discounts and commissions and estimated offering expenses payable by
us.

We intend to contribute all of the net proceeds from this offering (not including the exercise of the underwriters’ option to
purchase additional shares) to Legence Holdings in exchange for LGN Units. Legence Holdings intends to use such net proceeds from this offering for the repayment of outstanding borrowings under our Term Loan Credit Facility and the remaining
proceeds for general corporate purposes.

We intend to contribute the net proceeds received from the sale of any additional shares