Company: LGN
Filing Date: 2025-12-09
Form Type: S-1
Source: 0001193125-25-312729
Chunk: 200

Company: Legence Corp.
Filing Date: 2025-12-09
Form: S-1
Chunk 200
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 the aggregate number of shares that may be issued under the 2025 Plan or (ii) change the
classification of individuals eligible to receive awards under the 2025 Plan. The 2025 Plan will remain in effect for a period of 10 years (unless earlier terminated by our board of directors).

IPO Grants

In connection with the IPO,
we granted 620,390 restricted stock units and 668,570 stock options under the 2025 Plan to certain employees and non-employee directors (collectively, the “IPO Grants”), including our named
executive officers. Each stock option granted as of the pricing of this offering had an exercise price equal to the initial public offering price in connection with the IPO. Each IPO Grant to our named executive officers consists of 50% of
restricted stock units and 50% stock options, both of which vest in three substantially equal installments on each of the first, second and third anniversaries of the applicable vesting commencement date, subject generally to continued employment
through the applicable vesting date. Each IPO Grant to our non-employee directors consists of restricted stock units that will fully vest on the sooner of the first anniversary of the applicable vesting
commencement date or the day immediately preceding the Company’s 2026 annual shareholder meeting, subject generally to continued service through the applicable vesting date.

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PRINCIPAL AND SELLING STOCKHOLDERS The following table sets forth certain information regarding the beneficial ownership of our Class A Common Stock and Class B Common Stock as of the date of effectiveness of this registration statement with respect to:

| • |     | each person known to us to beneficially own more than 5% of any class of our outstanding Common Stock; |

| • |     | each of our Named Executive Officers; |

| • |     | each member of our board of directors; and |

| • |     | all of our directors and executive officers as a group. |

Applicable percentage of beneficial ownership prior to this offering is based on 58,656,167 shares of Class A Common Stock and 46,680,762 shares of Class B Common Stock outstanding as of the date of effectiveness of this registration statement. Applicable percentage of beneficial ownership after this offering is based on 62,810,480 shares of Class A Common Stock and 42,526,449 shares of Class B Common Stock outstanding immediately after this offering (or 63,460,413 shares of Class A Common Stock and 41,