FOR IMMEDIATE RELEASE

WARRENDALE, PA – May 8, 2023 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter ended March 31, 2023.

•Consolidated revenue was $121.0 million, an increase of 5.4% from $114.8 million.

•Gross profit was $26.2 million, an increase of 43.0% from $18.3 million.

•Net income of $3.0 million, or $0.27 per diluted share, compared to a net loss of $1.5 million, or $(0.15) per diluted share.

•Adjusted EBITDA of $8.7 million, up 154.0% from $3.4 million.

•Net cash provided by operating activities of $9.4 million, compared to net cash used in operating activities of $3.0 million.

Michael McCann, Limbach’s President and Chief Executive Officer, said, “We are off to a great start to the year as first quarter results reflected solid performance and execution in both of our operating segments. Our segment mix continued to benefit from the ODR contribution which, coupled with improved gross margin performance in each segment, resulted in a further increase in our consolidated gross margin. As our segment revenue contributions approach a 50/50 split, the higher growth in ODR, relative to the planned decline in General Contractor Relationships (“GCR”), also contributed to the year-over-year increase in total revenue.”

Mr. McCann continued, “Market conditions remain favorable as businesses in several of our primary end markets continue to invest in their building assets, such as data centers, hospitals, and manufacturing facilities. At the same time, our ability to flex between our customers’ capital and operating spending has us well positioned for any changes they make to their infrastructure investment plans. As we have noted previously, the tightness in industrial supply chains has also contributed to our ODR growth by driving demand for service and repair work necessary for customers to keep their systems operational until such time as new equipment replacement is available. When that time comes, we intend to leverage our role as an indispensable partner delivering value-added solutions to capture that replacement work.”

Mr. McCann concluded, “We are continuing to aggressively execute our plan and our first quarter results demonstrate how we believe that plan translates into expanding bottom-line results. While we are proud of this success, I want to emphasize that we are still in the early stages of our evolution. By continuing to evolve our customer relationships, centered on value-added solutions and proven success, while also maintaining an intense focus on maximizing the return on our own assets, we believe there is plenty of runway for further margin expansion, net income growth, and continued cash generation.”

The following are results for the three months ended March 31, 2023 compared to the three months ended March 31, 2022:

•Consolidated revenue was $121.0 million, an increase of 5.4% from $114.8 million. ODR segment revenue of $58.7 million increased by $15.8 million, or 36.9%, while GCR segment revenue of $62.3 million was down $9.6 million, or 13.4%. The Company continued its strategic focus on expanding the ODR segment’s contribution to the business and improving GCR project execution and profitability by pursuing GCR opportunities that were smaller in scope and lower in contract value, shorter in duration, and where the Company can leverage its captive design and engineering services.

•Gross margin increased to 21.7%, up from 16.0%. On a dollar basis, total gross profit was $26.2 million, compared to $18.3 million. ODR gross profit increased $5.9 million, or 59.4%, due to an increase in revenue at a higher margin of 27.1% versus 23.3% driven by project mix. GCR gross profit increased $2.0 million, or 23.5%, largely reflecting lower revenue at a higher margin. GCR gross margin improved to 16.6% from 11.6%.

•Selling, general and administrative expenses increased by approximately $2.3 million, to $21.1 million, compared to $18.7 million. The increase in SG&A was primarily due to a $1.9 million increase associated with payroll related expenses, $0.8 million related to CEO transition costs, and a $0.5 million increase in stock compensation expense, partially offset by a $0.5 million decrease in in rent related expenses and a $0.3 decrease in professional fees. As a percent of revenue, selling, general and administrative expenses were 17.4%, up from 16.3%.

•Interest expense, net, was $0.7 million compared to $0.5 million. This increase was due to higher interest rates on outstanding debt despite a lower overall outstanding debt balance period-over-period.

•Net income was $3.0 million as compared to a net loss of $1.5 million. Diluted income per share was $0.27 as compared to diluted loss per share of $(0.15). Adjusted EBITDA was $8.7 million as compared to $3.4 million, an increase of 154.0%.

•Net cash provided by operating activities was $9.4 million as compared to net cash used in operating activities of $3.0 million. The increase in operating cash flows was primarily attributable to a $4.5 million positive variance in net income as noted above.

At March 31, 2023, we had cash and cash equivalents of $41.4 million. We had current assets of $212.3 million and current liabilities of $142.5 million at March 31, 2023, representing a current ratio of 1.49x compared to 1.42x at December 31, 2022. Working capital was $69.8 million at March 31, 2023, an increase of $2.9 million from December 31, 2022. At March 31, 2023, we had no borrowings against our revolving credit facility, $4.2 million for standby letters of credit, and carried a term loan balance of $19.6 million. During the quarter, we made $1.9 million of scheduled principal payments on our term loan, which reduced our outstanding balance.

On May 5, 2023, the Company entered into the Second Amended and Restated Credit Agreement (the “Second A&R Credit Agreement”) with the lenders party thereto and Wintrust, which increased the Company's revolving commitments from $25.0 million to $50.0 million (the “Second A&R Wintrust Revolving Loan”), required the Company to repay the then outstanding principal balance of the Wintrust Term Loan using proceeds of the Second A&R Wintrust Revolving Loan and extended the maturity date of the revolving credit facility to February 24, 2028. Prior to the execution of this agreement, the Company repaid $9.6 million of the then outstanding balance under the Wintrust Term Loan with cash on hand. As of May 8, 2023, the Company had $10.0 million outstanding under the Second A&R Wintrust Revolving Loan. A copy of the Second A&R Credit Agreement was filed as Exhibit 10.6 within the Company's most recent Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 8, 2023.

We affirm our guidance for FY 2023 as follows:

The call will also be simultaneously webcast over the Internet via the “Investor Relations” section of Limbach’s website at www.limbachinc.com or by clicking on the conference call link: https://event.choruscall.com/mediaframe/webcast.html?webcastid=kd2gH5Bz. An audio replay of the call will be archived on Limbach’s website for 365 days.

Limbach is a building systems solutions firm with expertise in the design, prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning ("HVAC"), mechanical, electrical, plumbing and controls systems. With over 1,500 team members and 17 offices located throughout the United States, we partner with institutions with mission-critical infrastructures, such as data centers and healthcare, industrial & light manufacturing, cultural & entertainment, higher education, and life science facilities. With Limbach's full life-cycle capabilities, from concept design and engineering through system commissioning and recurring 24/7 service and maintenance, Limbach is positioned as a value-added and indispensable partner for building owners, construction managers, general contractors, and energy service companies.

We make forward-looking statements in this press release within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements relate to expectations or forecasts for future events, including, without limitation, our earnings, Adjusted EBITDA, revenues, expenses, backlog, capital expenditures or other future financial or business performance or strategies, results of operations or financial condition, and in particular statements regarding the impact of the COVID-19 pandemic on the construction industry in future periods, timing of the recognition of backlog as revenue, the potential for recovery of cost overruns, and the ability of Limbach to successfully remedy the issues that have led to write-downs in various business units. These statements may be preceded by, followed by or include the words “may,” “might,” “will,” “will likely result,” “should,” “estimate,” “plan,” “project,” “forecast,” “intend,” “expect,” “anticipate,” “believe,” “seek,” “continue,” “target” or similar expressions. These forward-looking statements are based on information available to us as of the date they were made and involve a number of risks and uncertainties which may cause them to turn out to be wrong. Some of these risks and uncertainties may in the future be amplified by the COVID-19 outbreak and there may be additional risks that we consider immaterial or which are unknown. Accordingly, forward-looking statements should not be relied upon as representing our views as of any subsequent date, and we do not undertake any obligation to update forward-looking statements to reflect events or circumstances after the date they were made, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws. As a result of a number of known and unknown risks and uncertainties, our actual results or performance may be materially different from those expressed or implied by these forward-looking statements. Please refer to our most recent annual report on Form 10-K, as well as our subsequent filings on Form 10-Q and Form 8-K, which are available on the SEC’s website (www.sec.gov), for a full discussion of the risks and other factors that may impact any forward-looking statements in this press release.

The Equity Group, Inc.

Jeremy Hellman, CFA

Vice President

(212) 836-9626 / jhellman@equityny.com

(1)As a percentage of GCR revenue.

(2)As a percentage of ODR revenue.

(3)Included within selling, general and administrative expenses was $1.1 million and $0.6 million of stock based compensation expense for the three months ended March 31, 2023 and 2022, respectively.

In assessing the performance of our business, management utilizes a variety of financial and performance measures. The key measure is Adjusted EBITDA, a non-GAAP financial measure. We define Adjusted EBITDA as net income plus depreciation and amortization expense, interest expense, and taxes, as further adjusted to eliminate the impact of, when applicable, other non-cash items or expenses that are unusual or non-recurring that we believe do not reflect our core operating results. We believe that Adjusted EBITDA is meaningful to our investors to enhance their understanding of our financial performance for the current period and our ability to generate cash flows from operations that are available for taxes, capital expenditures and debt service. We understand that Adjusted EBITDA is frequently used by securities analysts, investors and other interested parties as a measure of financial performance and to compare our performance with the performance of other companies that report Adjusted EBITDA. Our calculation of Adjusted EBITDA, however, may not be comparable to similarly titled measures reported by other companies. When assessing our operating performance, investors and others should not consider this data in isolation or as a substitute for net income calculated in accordance with GAAP. Further, the results presented by Adjusted EBITDA cannot be achieved without incurring the costs that the measure excludes. A reconciliation of net income to Adjusted EBITDA, the most comparable GAAP measure, is provided below.

We refer to our estimated revenue on uncompleted contracts, including the amount of revenue on contracts for which work has not begun, less the revenue we have recognized under such contracts, as “backlog.” Backlog includes unexercised contract options.

(1)For the three months ended March 31, 2023, the majority of the restructuring costs related to our Southern California and Eastern Pennsylvania branches. For the three months ended March 31, 2022, the majority of the restructuring costs related to our Southern California and Eastern Pennsylvania branches and nominal restructuring costs related to cost initiatives throughout the company.