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Equity | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
Equity | Equity The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001. Warrants In conjunction with the Company's initial public offering, the Company issued Public Warrants, Private Warrants and $15 Exercise Price Sponsor Warrants. The Company issued certain Merger Warrants and Additional Merger Warrants in conjunction with the Company's business combination with LHLLC in July 2016. On July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms. During 2023, 600,000 warrants exercisable for one share of common stock at an exercise price of $15.00 per share (“$15 Exercise Price Sponsor Warrants”) and 606,476 warrants exercisable for one share of common stock at an exercise price of $12.50 per share (“Merger Warrants”) were exercised on a cashless basis by the holders of the warrants, which resulted in the warrants being converted into 167,564 and 274,742 shares of the Company's common stock, respectively. The remaining 23,167 unexercised Merger Warrants expired by their terms on July 20, 2023. Incentive Plan Upon the consummation of the Company’s business combination with LHLLC in July 2016, the Company adopted an omnibus incentive plan (the “Omnibus Incentive Plan”) pursuant to which equity awards may be granted thereunder. In March 2023, the Board of Directors approved certain amendments to the Company's Omnibus Incentive Plan (the “2023 Amended and Restated Omnibus Incentive Plan”) to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 450,000, for a total of 3,050,000 shares, and extended the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the 2023 Amended and Restated Omnibus Incentive Plan. The amendments were acted upon by the Company's stockholders at the Annual Meeting held on June 22, 2023. In April 2025, the Board of Directors approved certain amendments to the 2023 Amended and Restated Omnibus Incentive Plan to make certain changes related to the treatment of death, disability, retirement and reduction in force as it relates to the plan participants. The amendments were acted upon by the Company's stockholders at the Annual Meeting held on June 11, 2025. See Note 17 – Management Incentive Plans for a discussion of the Company's management incentive plans for restricted stock units (“RSUs”) granted, vested, forfeited and remaining unvested. Share Repurchase Program In December 2025, the Company announced that its Board of Directors authorized a share repurchase program (the “Share Repurchase Program”), pursuant to which the Company may, from time to time, purchase up to $50.0 million of shares of its common stock through December 15, 2027. Share repurchases may be executed through various means, including, without limitation, open market transactions, privately negotiated transactions or by other means in accordance with federal securities laws. Repurchases may also be made under Rule 10b5-1 plans. The Share Repurchase Program does not obligate the Company to acquire any particular amount of common stock, and the program may be suspended or terminated by the Company at any time at its discretion without prior notice. As of December 31, 2025, the Company has not repurchased any common stock under its Share Repurchase Program. Employee Stock Purchase Plan Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company’s common stock through payroll deductions during consecutive subscription periods at a purchase price of 85% of the fair market value of a share of the Company’s common stock at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lasts six months, commencing on January 1st and July 1st of each year. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over the six-month vesting period during which employees perform related services. Under the ESPP, 500,000 shares are authorized to be issued. For the years ended December 31, 2025 and 2024, the Company issued 4,496 and 6,090 shares of its common stock, respectively, to participants in the ESPP who contributed to the plan during these periods. As of December 31, 2025, 378,370 shares remain available for future issuance under the ESPP.

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