Nature of Operations	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Organization Legence Corp. was incorporated as a Delaware corporation on January 9, 2025 as a holding company for the purpose of facilitating an initial public offering ("IPO") and other related transactions in order to carry on the business of Legence Holdings LLC ("Legence Holdings"). Legence Holdings and its subsidiaries are a leading provider of engineering, installation and maintenance services for mission-critical systems in buildings. The Company focuses on high-growth sectors that have technically demanding buildings, including technology, life sciences, healthcare and education. The Company specializes in designing, fabricating and installing complex heating, ventilation and air conditioning (“HVAC”), process piping and other mechanical, electrical and plumbing (“MEP”) systems for new facilities and upgrading HVAC, lighting and building controls in existing facilities to enhance building performance, improve reliability and drive efficiency. Services are primarily provided on a fixed price basis. All references to the “Company” or “Legence” in this report are to Legence Corp. and its consolidated subsidiaries. Initial Public Offering On September 11, 2025, our registration statement on Form S-1 related to our IPO was declared effective by the Securities and Exchange Commission, and our Class A common stock ("Class A Common Stock") began trading on the Nasdaq Global Select Market, or the Nasdaq, under the ticker symbol “LGN” on September 12, 2025. Our IPO was completed on September 15, 2025. The Company sold 29,487,627 shares, including the partial exercise of the underwriters’ option to purchase additional shares, of its Class A Common Stock at a public offering price of $28.00 per share. Legence Corp. received net proceeds from the IPO of $780.2 million, net of underwriting discounts and commissions. Legence Corp. contributed the proceeds from the IPO in exchange for newly issued limited liability company interests in Legence Holdings, and Legence Holdings used the net proceeds to pay outstanding offering costs and repay outstanding debt. Refer to “Note 12—Stockholders' Equity / Member's Equity.” In connection with the IPO, the Company completed a series of organizational transactions (the “Corporate Reorganization”). Prior to the IPO and Corporate Reorganization, Legence Holdings was a single-member limited liability company that was a wholly owned subsidiary of Legence Intermediate, which was a wholly owned subsidiary of Legence Parent. Member’s equity was adjusted as a result of transactions between Legence Holdings and Legence Parent. Such transactions consisted of contributions to Legence Holdings from Legence Parent and distributions from Legence Holdings to Legence Parent. Legence Parent has different classes of equity interests: Series A Profits Interests (“Series A Profits Interests”), Series B Common Interests (“Series B Common Interests”) and Series C Common Interests (“Series C Common Interests”), which includes Restricted Series C Common Interests (“Restricted Series C Common Interests”), (together with Series B Common Interests, “Legence Parent Common Interests”), each with specific terms and conditions. Series A Profits Interests were granted to employees of Legence Holdings and its subsidiaries and are comprised of Time Interests, Performance Interests, and Exit Interests. Series B Common Interests are held by BX Refficiency Aggregator LP. Series C Common Interests are held by certain members of Legence Holdings’ management and former owners of acquired companies who received Series C Common Interests as part of the consideration transferred. Restricted Series C Common Interests were issued in connection with an acquisition as compensation for future services to certain of the acquiree’s former shareholders and employees who became Legence Holdings’ employees in connection with the acquisition. Corporate Reorganization The Corporate Reorganization included the following: a.The Limited Liability Company Agreement of Legence Holdings was amended and restated to, among other things, (i) make Legence Corp. the managing member of Legence Holdings and (ii) recapitalize the ownership interests in Legence Holdings into two classes of limited liability company interests with the same economic rights (“LGN A Units” and “LGN B Units”, collectively “LGN Units”). b.Certain entities were formed and reorganized as follows: 1.Legence Parent LLC (“Legence Parent”) formed Legence Corp. 2.Legence Intermediate LLC (“Legence Intermediate”) distributed a portion of its interests in Legence Holdings to Legence Parent, which then distributed a portion of such interests to certain Blackstone Inc. ("Blackstone") entities and management holders that held equity in Legence Parent (“Legacy Owners”). 3.Certain Legacy Owners contributed a portion of their interests in Legence Holdings (either directly or indirectly through certain Blackstone entities) to Legence Corp. and Legence Intermediate contributed a portion of its interests in Legence Holdings to Legence Corp, all in exchange for 29,022,940 shares of newly issued Class A Common Stock. 4.Certain Legacy Owners contributed the 28,844,369 shares of Class A Common Stock received pursuant to item 3 above to newly created Legence Parent II LLC (“Legence Parent II”) in exchange for Legence Parent II Common Interests (together with Legence Parent Common Interests, the “Common Interests") and Legence Parent II Series A Capital Interests (the "Series A Capital Interests") and Legence Intermediate was liquidated and distributed its remaining interests in Legence Holdings and its 178,571 shares of Class A Common Stock to Legence Parent. 5.Management holders contributed their interests in Legence Parent and Legence Parent II to newly created entities above Legence Parent and Legence Parent II called Legence Parent Management Aggregator LLC (“Management Aggregator I”) and Legence Parent II Management Aggregator LLC (“Management Aggregator II”, collectively the “Management Aggregators”), respectively, in exchange for interests of the Management Aggregators with similar terms and economics. 6.Legence Parent subscribed for Class B common stock ("Class B Common Stock") of Legence Corp. for nominal consideration, reflecting its historic indirect ownership of Legence Holdings. Legence Holdings recapitalized its ownership interests into newly issued LGN Units, and Legence Parent retained a portion of their pre-IPO ownership in Legence Holdings through LGN B Units. Refer to “Note 14 —Nonc ontrolling Interests”. 7.Legence Corp., through its subsidiary, contributed the net proceeds of the offering to Legence Holdings in exchange for newly issued LGN A Units. c.Legence Corp. entered into an exchange agreement (the "Exchange Agreement") in which the holders of LGN B Units, may exchange their LGN B Units, together with an equal number of corresponding shares of Class B Common Stock, for shares of Class A Common Stock of Legence Corp. on a one-for-one basis or the cash equivalent thereof (based on the 10-day volume weighted average price of the shares of Class A Common Stock at the time of exchange) as determined by Legence (the “Exchange Right”). d.The Company entered into a tax receivable agreement (the “TRA”) pursuant to which the Company will pay to certain Legacy Owners 85% of the net cash tax savings, if any, that the Company realizes from certain tax attributes and benefits arising in connection with the IPO and future exchanges of LGN B Units, and the Company will retain the remaining 15% of such benefits. Refer to “Note 1 6 —Tax Receivable Ag reement”. e.Legence Parent historically issued Series A profits interests (“Series A Profits Interests”) awards and Restricted Series C common interests (“Restricted Series C Common Interests”) awards as compensation to the Company’s employees. The Series A Profits Interests were exchanged for equivalent interests in newly created entities above the consolidated structure of the Company as follows: (i) a portion of Series A Profits Interests from Legence Parent were exchanged for Series A Capital Interests of newly created Legence Parent II, (ii) Series A Capital Interests of Legence Parent II were exchanged for Class A Management Holdings Interests of Management Aggregator II (“Aggregator II Mirror A Units”), and (iii) the remaining Series A Profits Interests of Legence Parent were exchanged for Class A Management Holdings Interests of Management Aggregator I (“Aggregator I Mirror A Units” and, together with Aggregator II Mirror A Units, the “Rollover Series A Profits Interests”). The Rollover Series A Profits Interests, together with historical Series A Profits Interests, are collectively referred to as “Series A Interests”. The Restricted Series C Common Interests of Legence Parent were exchanged for Class C Management Holdings Interests of Management Aggregator I (“Rollover Restricted Series C Interests”, and together with Restricted Series C Common Interests, the “Restricted Series C Interests”). Refer to “Note 2 —Summary of Significant Accounting Policies” and “Note 13—Stock-Based Compensation and Long-term Incentive Awards”. Effective September 11, 2025, following approval by the Company’s stockholders, the Board of Directors of Legence Corp. (the "Board") adopted the Legence Corp. 2025 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). In connection with the IPO, certain employees, including our named executive officers, and non-employee directors were granted stock options and/or restricted stock units (“RSUs”) under the Omnibus Incentive Plan. Refer to “Note 2—Summary of Significant Accounting Policies” and “Note 13—Stock-Based Compensation and Long-term Incentive Awards”. The corporate structure following the completion of the IPO, as described above, is commonly referred to as an “UP-C” structure, which is often used by partnerships and limited liability companies undertaking an initial public offering. The Company consolidates Legence Holdings as part of the consolidated financial statements and reports a noncontrolling interest related to the LGN B Units held by Legence Parent. Immediately following the closing of the IPO, the Company is a holding company, and its sole material asset is a controlling equity interest in Legence Holdings. As the managing member of Legence Holdings, the Company operates and controls all of the business and affairs of Legence Holdings, has the obligation to absorb losses and receive benefits from Legence Holdings and, through Legence Holdings and its subsidiaries, conducts its business. The Corporate Reorganization was accounted for in a manner consistent with a reorganization of entities under common control. The Consolidated Financial Statements for periods prior to the IPO and Corporate Reorganization relate to Legence Holdings. Prior to the Corporate Reorganization, Legence Corp. had no operations. Subsequent Organizational Transactions In the fourth quarter of 2025, Legence Parent and Legence Parent II each formed wholly owned subsidiaries, Legence Parent ML LLC (“Legence Parent ML”) and Legence Parent II ML LLC (“Legence Parent II ML” and together with Legence Parent ML, the “ML Entities”). Legence Parent and Legence Parent II subsequently transferred their respective interests in Legence Holdings and Legence Corp. to the ML Entities. The ML Entities now hold the interests in Legence Holdings and Legence Corp. previously held by Legence Parent and Legence Parent II and, together with those entities, are included in references to the “Parent Entities” in these consolidated financial statements. Additionally, on December 16, 2025, the Company completed a secondary offering of 8,402,178 shares of Class A Common Stock on behalf of the Parent Entities at a price of $45.00 per share. Refer to “Note 12—Stockholders' Equity / Member's Equity.”

Legence Corp. was incorporated as a Delaware corporation on January 9, 2025 as a holding company for the purpose of facilitating an initial public offering ("IPO") and other related transactions in order to carry on the business of Legence Holdings LLC ("Legence Holdings"). Legence Holdings and its subsidiaries are a leading provider of engineering, installation and maintenance services for mission-critical systems in buildings. The Company focuses on high-growth sectors that have technically demanding buildings, including technology, life sciences, healthcare and education. The Company specializes in designing, fabricating and installing complex heating, ventilation and air conditioning (“HVAC”), process piping and other mechanical, electrical and plumbing (“MEP”) systems for new facilities and upgrading HVAC, lighting and building controls in existing facilities to enhance building performance, improve reliability and drive efficiency. Services are primarily provided on a fixed price basis.

On September 11, 2025, our registration statement on Form S-1 related to our IPO was declared effective by the Securities and Exchange Commission, and our Class A common stock ("Class A Common Stock") began trading on the Nasdaq Global Select Market, or the Nasdaq, under the ticker symbol “LGN” on September 12, 2025. Our IPO was completed on September 15, 2025. The Company sold 29,487,627 shares, including the partial exercise of the underwriters’ option to purchase additional shares, of its Class A Common Stock at a public offering price of $28.00 per share. Legence Corp. received net proceeds from the IPO of $780.2 million, net of underwriting discounts and commissions. Legence Corp. contributed the proceeds from the IPO in exchange for newly issued limited liability company interests in Legence Holdings, and Legence Holdings used the net proceeds to pay outstanding offering costs and repay outstanding debt. Refer to “Note 12—Stockholders' Equity / Member's Equity.”

In connection with the IPO, the Company completed a series of organizational transactions (the “Corporate Reorganization”). Prior to the IPO and Corporate Reorganization, Legence Holdings was a single-member limited liability company that was a wholly owned subsidiary of Legence Intermediate, which was a wholly owned subsidiary of Legence Parent.

Legence Parent has different classes of equity interests: Series A Profits Interests (“Series A Profits Interests”), Series B Common Interests (“Series B Common Interests”) and Series C Common Interests (“Series C Common Interests”), which includes Restricted Series C Common Interests (“Restricted Series C Common Interests”), (together with Series B Common Interests, “Legence Parent Common Interests”), each with specific terms and conditions.

Series A Profits Interests were granted to employees of Legence Holdings and its subsidiaries and are comprised of Time Interests, Performance Interests, and Exit Interests. Series B Common Interests are held by BX Refficiency Aggregator LP. Series C Common Interests are held by certain members of Legence Holdings’ management and former owners of acquired companies who received Series C Common Interests as part of the consideration transferred. Restricted Series C Common Interests were issued in connection with an acquisition as compensation for future services to certain of the acquiree’s former shareholders and employees who became Legence Holdings’ employees in connection with the acquisition.

a.The Limited Liability Company Agreement of Legence Holdings was amended and restated to, among other things, (i) make Legence Corp. the managing member of Legence Holdings and (ii) recapitalize the ownership interests in Legence Holdings into two classes of limited liability company interests with the same economic rights (“LGN A Units” and “LGN B Units”, collectively “LGN Units”).

2.Legence Intermediate LLC (“Legence Intermediate”) distributed a portion of its interests in Legence Holdings to Legence Parent, which then distributed a portion of such interests to certain Blackstone Inc. ("Blackstone") entities and management holders that held equity in Legence Parent (“Legacy Owners”).

3.Certain Legacy Owners contributed a portion of their interests in Legence Holdings (either directly or indirectly through certain Blackstone entities) to Legence Corp. and Legence Intermediate contributed a portion of its interests in Legence Holdings to Legence Corp, all in exchange for 29,022,940 shares of newly issued Class A Common Stock.

4.Certain Legacy Owners contributed the 28,844,369 shares of Class A Common Stock received pursuant to item 3 above to newly created Legence Parent II LLC (“Legence Parent II”) in exchange for Legence Parent II Common Interests (together with Legence Parent Common Interests, the “Common Interests") and Legence Parent II Series A Capital Interests (the "Series A Capital Interests") and Legence Intermediate was liquidated and distributed its remaining interests in Legence Holdings and its 178,571 shares of Class A Common Stock to Legence Parent.

5.Management holders contributed their interests in Legence Parent and Legence Parent II to newly created entities above Legence Parent and Legence Parent II called Legence Parent Management Aggregator LLC (“Management Aggregator I”) and Legence Parent II Management Aggregator LLC (“Management Aggregator II”, collectively the “Management Aggregators”), respectively, in exchange for interests of the Management Aggregators with similar terms and economics.

6.Legence Parent subscribed for Class B common stock ("Class B Common Stock") of Legence Corp. for nominal consideration, reflecting its historic indirect ownership of Legence Holdings. Legence Holdings recapitalized its ownership interests into newly issued LGN Units, and Legence Parent retained a portion of their pre-IPO ownership in Legence Holdings through LGN B Units. Refer to “Note 14 —Nonc ontrolling Interests”.

c.Legence Corp. entered into an exchange agreement (the "Exchange Agreement") in which the holders of LGN B Units, may exchange their LGN B Units, together with an equal number of corresponding shares of Class B Common Stock, for shares of Class A Common Stock of Legence Corp. on a one-for-one basis or the cash equivalent thereof (based on the 10-day volume weighted average price of the shares of Class A Common Stock at the time of exchange) as determined by Legence (the “Exchange Right”).

d.The Company entered into a tax receivable agreement (the “TRA”) pursuant to which the Company will pay to certain Legacy Owners 85% of the net cash tax savings, if any, that the Company realizes from certain tax attributes and benefits arising in connection with the IPO and future exchanges of LGN B Units, and the Company will retain the remaining 15% of such benefits. Refer to “Note 1 6 —Tax Receivable Ag reement”.

e.Legence Parent historically issued Series A profits interests (“Series A Profits Interests”) awards and Restricted Series C common interests (“Restricted Series C Common Interests”) awards as compensation to the Company’s employees. The Series A Profits Interests were exchanged for equivalent interests in newly created entities above

the consolidated structure of the Company as follows: (i) a portion of Series A Profits Interests from Legence Parent were exchanged for Series A Capital Interests of newly created Legence Parent II, (ii) Series A Capital Interests of Legence Parent II were exchanged for Class A Management Holdings Interests of Management Aggregator II (“Aggregator II Mirror A Units”), and (iii) the remaining Series A Profits Interests of Legence Parent were exchanged for Class A Management Holdings Interests of Management Aggregator I (“Aggregator I Mirror A Units” and, together with Aggregator II Mirror A Units, the “Rollover Series A Profits Interests”). The Rollover Series A Profits Interests, together with historical Series A Profits Interests, are collectively referred to as “Series A Interests”. The Restricted Series C Common Interests of Legence Parent were exchanged for Class C Management Holdings Interests of Management Aggregator I (“Rollover Restricted Series C Interests”, and together with Restricted Series C Common Interests, the “Restricted Series C Interests”). Refer to “Note 2 —Summary of Significant Accounting Policies” and “Note 13—Stock-Based Compensation and Long-term Incentive Awards”.

Effective September 11, 2025, following approval by the Company’s stockholders, the Board of Directors of Legence Corp. (the "Board") adopted the Legence Corp. 2025 Omnibus Incentive Plan (the “Omnibus Incentive Plan”). In connection with the IPO, certain employees, including our named executive officers, and non-employee directors were granted stock options and/or restricted stock units (“RSUs”) under the Omnibus Incentive Plan. Refer to “Note 2—Summary of Significant Accounting Policies” and “Note 13—Stock-Based Compensation and Long-term Incentive Awards”.

The corporate structure following the completion of the IPO, as described above, is commonly referred to as an “UP-C” structure, which is often used by partnerships and limited liability companies undertaking an initial public offering. The Company consolidates Legence Holdings as part of the consolidated financial statements and reports a noncontrolling interest related to the LGN B Units held by Legence Parent.

Immediately following the closing of the IPO, the Company is a holding company, and its sole material asset is a controlling equity interest in Legence Holdings. As the managing member of Legence Holdings, the Company operates and controls all of the business and affairs of Legence Holdings, has the obligation to absorb losses and receive benefits from Legence Holdings and, through Legence Holdings and its subsidiaries, conducts its business.

The Corporate Reorganization was accounted for in a manner consistent with a reorganization of entities under common control. The Consolidated Financial Statements for periods prior to the IPO and Corporate Reorganization relate to Legence Holdings. Prior to the Corporate Reorganization, Legence Corp. had no operations.

In the fourth quarter of 2025, Legence Parent and Legence Parent II each formed wholly owned subsidiaries, Legence Parent ML LLC (“Legence Parent ML”) and Legence Parent II ML LLC (“Legence Parent II ML” and together with Legence Parent ML, the “ML Entities”). Legence Parent and Legence Parent II subsequently transferred their respective interests in Legence Holdings and Legence Corp. to the ML Entities. The ML Entities now hold the interests in Legence Holdings and Legence Corp. previously held by Legence Parent and Legence Parent II and, together with those entities, are included in references to the “Parent Entities” in these consolidated financial statements. Additionally, on December 16, 2025, the Company completed a secondary offering of 8,402,178 shares of Class A Common Stock on behalf of the Parent Entities at a price of $45.00 per share. Refer to “Note 12—Stockholders' Equity / Member's Equity.”