Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-36541 LIMBACH- PrimaryLogo_RGB_edited.jpg LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware, USA 46-5399422 (State or ...

1 NASDAQ: LMB INVESTOR PRESENTATION March 2023 Forward Looking Statements 2 We make forward-looking statements in this presentation 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, the execution of the Company's long-term strategic roadmap. These statements may be preceded by, followed by or include the words "may," "might," "will," "will likely result," "should, ...

Limbach Holdings, Inc. (NASDAQ:LMB) Q4 2022 Earnings Conference Call March 9, 2023 9:00 AM ET Company Participants Jeremy Hellman - IR Charlie Bacon - President and CEO Jayme Brooks - CFO Michael McCann - COO and Incoming-CEO Conference Call Participants Rob Brown - Lake Street Capital Chip Moore - EF Hutton Operator Greetings, and welcome to Limbach Holdings Fourth Quarter and Full Year 2022 Earnings Call. At this time, all participants are in a listen-only mode. A brief question-and-answer session will fo ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-36541 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 46-5399422 (State or other jurisdiction of (I.R.S. Employer Identification incorporat ...