TFSCU / 1347 Capital Corp. - Depositi SEC, Relazione annuale, dichiarazione di delega

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 18, 2026 LIMBACH HOLDINGS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 18, 2026 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fil

LEGAL\115039322\2 May 18, 2026 EXHIBIT 10.1 Michael J. Reed [Address] RE: Promotion to Chief Operating Officer Dear Mike, Subject to approval by the Board of Directors of Limbach Holdings, Inc., a Delaware corporation (the “Parent”) it is with pleasu

exhibit101-limbachxmiker LEGAL\115039322\2 May 18, 2026 EXHIBIT 10.1 Michael J. Reed [Address] RE: Promotion to Chief Operating Officer Dear Mike, Subject to approval by the Board of Directors of Limbach Holdings, Inc., a Delaware corporation (the “Parent”) it is with pleasure that I confirm our offer to promote you to Chief Operating Officer of the Parent and its wholly-owned subsidiary, Limbach

FOR IMMEDIATE RELEASE Limbach Strengthens Operational Leadership with Appointment of Chief Operating Officer Appointment Supports Operational Excellence, Scalable Growth and Long-Term Value Creation TAMPA, Fla. — May 18, 2026 — Limbach Holdings, Inc.

ex991-may2026cooannounce FOR IMMEDIATE RELEASE Limbach Strengthens Operational Leadership with Appointment of Chief Operating Officer Appointment Supports Operational Excellence, Scalable Growth and Long-Term Value Creation TAMPA, Fla.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 5, 2026 LIMBACH HOLDINGS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 5, 2026 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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, 2026 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

Limbach Holdings, Inc. Reports First Quarter 2026 Results Reaffirms Full Year 2026 Revenue Guidance of $730 million to $760 million and Adjusted EBITDA of $90 million to $94 million

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports First Quarter 2026 Results Reaffirms Full Year 2026 Revenue Guidance of $730 million to $760 million and Adjusted EBITDA of $90 million to $94 million TAMPA, Fla. – May 5, 2026 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), a building systems solutions firm that partners with building owners and operators who have mission-c

EX-99.2

a2026q1reportrevisedmay5

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

2025 ANNUAL REPORT CRITICAL SYSTEMS, AHEAD OF THE MOMENT 0 160 320 480 640 2025 Financial Highlights Limbach (NASDAQ: LMB), is a building systems solutions firm that designs, delivers, and maintains mechanical (heating, ventilation, and air condition

lmb2025annualreport 2025 ANNUAL REPORT CRITICAL SYSTEMS, AHEAD OF THE MOMENT 0 160 320 480 640 2025 Financial Highlights Limbach (NASDAQ: LMB), is a building systems solutions firm that designs, delivers, and maintains mechanical (heating, ventilation, and air conditioning), electrical, plumbing, and controls (“MEPC”) systems that support life’s most important moments.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

EX-99.2

limbachinvestorpresentat

Limbach Holdings, Inc. Reports Fourth Quarter and Full Year 2025 Results Delivered FY2025 Record Revenue, Net Income and Adjusted EBITDA

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Fourth Quarter and Full Year 2025 Results Delivered FY2025 Record Revenue, Net Income and Adjusted EBITDA WARRENDALE, PA – March 2, 2026 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), a building systems solutions firm that partners with building owners and operators who have mission-critical mechanical, electrical, plumbing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 2, 2026 LIMBACH HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 2, 2026 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

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, 2025 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 specifie

Subsidiaries of Limbach Holdings, Inc. Subsidiary State of Formation Limbach Holdings LLC Delaware Limbach Facility Services LLC Delaware Harper Limbach Construction LLC Delaware Harper Limbach LLC Delaware Limbach Company LP Delaware Limbach Company

EXHIBIT 21.1 Subsidiaries of Limbach Holdings, Inc. Subsidiary State of Formation Limbach Holdings LLC Delaware Limbach Facility Services LLC Delaware Harper Limbach Construction LLC Delaware Harper Limbach LLC Delaware Limbach Company LP Delaware Limbach Company LLC Delaware Limbach Facility & Project Solutions LLC Delaware Jake Marshall, LLC Tennessee Coating Solutions, LLC Tennessee Acme Indust

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 1, 2026 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 1, 2026 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

EXHIBIT 99.1 1 FOR IMMEDIATE RELEASE Limbach Announces Appointment of New Independent Director Former Trane senior executive brings four decades of leadership from a global HVAC leader to Limbach’s board WARRENDALE, PA. – January 5, 2026– Limbach Hol

limbach-pressreleasenewb EXHIBIT 99.1 1 FOR IMMEDIATE RELEASE Limbach Announces Appointment of New Independent Director Former Trane senior executive brings four decades of leadership from a global HVAC leader to Limbach’s board WARRENDALE, PA. – January 5, 2026– Limbach Holdings, Inc. (NASDAQ: LMB) (“Limbach” or the “Company”), a building systems solutions firm that partners with building owners

EXHIBIT 99.1 1 FOR IMMEDIATE RELEASE Limbach Announces $50 Million Share Repurchase Program Authorization WARRENDALE, PA. – December 15, 2025 – Limbach Holdings, Inc. (NASDAQ: LMB) (“Limbach” or the “Company”), a building systems solutions firm that

limbach-pressreleaseshar EXHIBIT 99.1 1 FOR IMMEDIATE RELEASE Limbach Announces $50 Million Share Repurchase Program Authorization WARRENDALE, PA. – December 15, 2025 – Limbach Holdings, Inc. (NASDAQ: LMB) (“Limbach” or the “Company”), a building systems solutions firm that partners with building owners and facilities managers who have mission-critical mechanical, electrical, and plumbing infrastr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 15, 2025 LIMBACH HOLDING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 15, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 4, 2025 LIMBACH HOLDINGS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 4, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings, Inc. Reports Third Quarter 2025 Results Delivered Q3 Net Income of $8.8 million and Adjusted EBITDA of $21.8 million Reaffirms Full Year 2025 Revenue Guidance of $650 million to $680 million and Adjusted EBITDA of $80 million to $86

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Third Quarter 2025 Results Delivered Q3 Net Income of $8.8 million and Adjusted EBITDA of $21.8 million Reaffirms Full Year 2025 Revenue Guidance of $650 million to $680 million and Adjusted EBITDA of $80 million to $86 million WARRENDALE, PA – November 4, 2025 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced i

Investor Presentation Growth & Market Positioning Q3 Earnings | November 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995. These forwar

limbachinvestorpresentat Investor Presentation Growth & Market Positioning Q3 Earnings | November 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 2025 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 nam

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144 0001965562 XXXXXXXX LIVE 0001606163 LIMBACH HOLDINGS, INC. 001-36541 797 Commonwealth Drive Warrendale PA 15086 4123592100 JAY SHARP Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 2000 211860.00 11626814 09/15/2025 NASDAQ Common 03/14/2024 Performance Stock Units Issuer N 2000 03/14/2024 N/A Y 09/15/2025 03/14/2025 /s/ J

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

Acquisition of Pioneer Power Inc.1 General Limbach Holdings, Inc. (“Limbach”, or the “Company”) announced on July 1, 2025 that it acquired Pioneer Power, Inc. (“PPI” or “Pioneer Power”) for a purchase price at closing of $66.1 million, financed throu

exhibit991-lmbform8xk Acquisition of Pioneer Power Inc.1 General Limbach Holdings, Inc. (“Limbach”, or the “Company”) announced on July 1, 2025 that it acquired Pioneer Power, Inc. (“PPI” or “Pioneer Power”) for a purchase price at closing of $66.1 million, financed through a combination of available cash and borrowings under the Company’s recently expanded revolving credit facility. Founded in 19

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 5, 2025 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 5, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 June 30, 2025 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

Investor Presentation Growth & Market Positioning Q2 Earnings | August 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-

generalinvestorpresentat Investor Presentation Growth & Market Positioning Q2 Earnings | August 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Limbach Holdings, Inc. Reports Second Quarter 2025 Results Delivered Q2 Net Income of $7.8 million and Adjusted EBITDA of $17.9 million Increases Full Year 2025 Revenue Guidance to $650 million to $680 million and Adjusted EBITDA to $80 million to $8

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Second Quarter 2025 Results Delivered Q2 Net Income of $7.8 million and Adjusted EBITDA of $17.9 million Increases Full Year 2025 Revenue Guidance to $650 million to $680 million and Adjusted EBITDA to $80 million to $86 million WARRENDALE, PA – August 5, 2025 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced it

Second Amendment to the Second Amended and Restated Credit Agreement, dated as of June 27, 2025, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer.

EXHIBIT 10.1 SECOND AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT This SECOND AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of June 27, 2025 (the “Effective Date”), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (“Borrower”), LIMBACH HOLDINGS LLC, a Delaware limited liability company (“Intermediate Holdco”),

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 27, 2025 LIMBACH HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 27, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan

limbach-omnibusincentive EXHIBIT 10.1 LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN Section 1. General. The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the “Plan”). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s obje

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 11, 2025 LIMBACH HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 11, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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, 2025 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

Investor Presentation Growth & Market Positioning Q1 Earnings | May 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-loo

Investor Presentation Growth & Market Positioning Q1 Earnings | May 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 5, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission File

Limbach Holdings, Inc. Reports First Quarter 2025 Results Q1 2025 Net Income Reaches a Record of $10.2 Million, with Quarterly Adjusted EBITDA Increasing to $14.9 Million

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports First Quarter 2025 Results Q1 2025 Net Income Reaches a Record of $10.2 Million, with Quarterly Adjusted EBITDA Increasing to $14.9 Million WARRENDALE, PA – May 5, 2025 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter ended March 31, 2025. First Quarter 2025 Highlights Comp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

A Leading Building Systems Solutions Firm 2O24 ANNUAL REPORT Limbach Holdings, Inc., (NASDAQ: LMB), with revenue of $518.8 million in 2024, is a building systems solutions firm that partners with building owners and facilities managers who have missi

A Leading Building Systems Solutions Firm 2O24 ANNUAL REPORT Limbach Holdings, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

Subsidiaries of the Company (filed herewith)

EXHIBIT 21.1 Subsidiaries of Limbach Holdings, Inc. Subsidiary State of Formation Limbach Holdings LLC Delaware Limbach Facility Services LLC Delaware Harper Limbach Construction LLC Delaware Harper Limbach LLC Delaware Limbach Company LP Delaware Limbach Company LLC Delaware Limbach Facility & Project Solutions LLC Delaware Jake Marshall, LLC Tennessee Coating Solutions, LLC Tennessee Acme Indust

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 10, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

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, 2024 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 specifie

Limbach Holdings, Inc. Reports Fourth Quarter and Full Year 2024 Results Delivered FY2024 Record Net Income and Record Adjusted EBITDA

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Fourth Quarter and Full Year 2024 Results Delivered FY2024 Record Net Income and Record Adjusted EBITDA WARRENDALE, PA – March 10, 2025 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter and year ended December 31, 2024. 2024 Highlights Compared to 2023 •Record full-year net

Limbach Holdings, Inc. Insider Trading Policy (filed herewith)

EXHIBIT 19.1 LEGAL\61927478\5 AMENDED AND RESTATED POLICY REGARDING INSIDER TRADING AND DISSEMINATION OF INSIDE INFORMATION (Originally Adopted August 26, 2016 and amended and restated as of February 23, 2019, May 7, 2019, March 12, 2020, April 14, 2023 and September 5, 2024) The following describes the policy of Limbach Holdings, Inc. (the “Company”) regarding: • the trading of securities while y

Limbach Holdings, Inc. Clawback Policy (filed herewith)

Board Approved Version Limbach Holdings, Inc. Clawback Policy (Covered Executives) The Board of Directors (the “Board”) of Limbach Holdings, Inc. (the “Company”) believes that it is in the best interests of the Company and its stockholders to adopt this Clawback Policy (this “Policy”), which provides for the recovery of certain incentive-based compensation upon the occurrence of certain events, in

Investor Presentation Growth & Market Positioning 2024 Earnings | March 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995. These forward

Investor Presentation Growth & Market Positioning 2024 Earnings | March 2025 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Form of Time-Based Restricted Stock Unit Agreement

Exhibit 10.3 Form of Time-Based Award for Executives Limbach Holdings, Inc. Omnibus Incentive Plan TIME-Based RESTRICTED STOCK UNIT AGREEMENT This TIME-BASED RESTRICTED STOCK UNIT AGREEMENT (this “Agreement”) is made effective as of January 1, 2025, (the “Grant Date”) by and between Limbach Holdings, Inc., a Delaware corporation (the “Company”), and [NAME] (the “Participant”), pursuant to the Limb

Limbach Holdings, Inc. Executive Severance and Change in Control Plan

Exhibit 10.1 Limbach Holdings, Inc. Executive Severance and Change in Control Plan 1. Purpose. Limbach Holdings, Inc., a Delaware corporation (collectively with its subsidiaries and affiliates, and any successor that assumes the obligations of the Company under the Plan, by way of merger, acquisition, or otherwise, the “Company”), hereby adopts the Limbach Holdings, Inc. Executive Severance and Ch

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 1, 2025 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Form of Performance-Based Restricted Stock Unit Agreement

Exhibit 10.2 Form of Performance-Based Award for Executives (2025 TSR Version) Limbach Holdings, Inc. Omnibus Incentive Plan Performance-based RESTRICTED STOCK UNIT AGREEMENT This PERFORMANCE-BASED RESTRICTED STOCK UNIT AGREEMENT (this “Agreement”) is made effective as of January 1, 2025, (the “Grant Date”) by and between Limbach Holdings, Inc., a Delaware corporation (the “Company”), and [NAME] (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 2, 2024 LIMBACH HOLDINGS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 2, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings Acquires Consolidated Mechanical Leading provider of industrial facility systems solutions serving Kentucky, Michigan, and Illinois expands Limbach’s owner direct relationships WARRENDALE, PA – December 2, 2024 – Limbach Holdings, In

cumberlandpressrelease-f Limbach Holdings Acquires Consolidated Mechanical Leading provider of industrial facility systems solutions serving Kentucky, Michigan, and Illinois expands Limbach’s owner direct relationships WARRENDALE, PA – December 2, 2024 – Limbach Holdings, Inc.

LMB / Limbach Holdings, Inc. / VANGUARD GROUP INC Passive Investment

240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* (Name of Issuer) Limbach Holdings Inc (Title of Class of Securities) Common Stock (CUSIP Number) 53263

LMB / Limbach Holdings, Inc. / BlackRock, Inc. Passive Investment

SC 13G/A 1 us53263p1057110824.txt us53263p1057110824.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) Limbach Holdings, Inc. - (Name of Issuer) Common Stock - (Title of Class of Securities) 53263P105 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriat

Limbach Holdings, Inc. Announces Third Quarter 2024 Results Raising 2024 Adjusted EBITDA Guidance after Delivering Q3 Net Income of $7.5 million and Record Quarterly Adjusted EBITDA of $17.3 million

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces Third Quarter 2024 Results Raising 2024 Adjusted EBITDA Guidance after Delivering Q3 Net Income of $7.5 million and Record Quarterly Adjusted EBITDA of $17.3 million WARRENDALE, PA – November 5, 2024 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter ended September 30, 202

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 5, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 2024 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 nam

As filed with the Securities and Exchange Commission on November 5, 2024

As filed with the Securities and Exchange Commission on November 5, 2024 Registration No.

Investor Presentation 2024 Q3 Earnings | November 2024 NASDAQ: LMB NASDAQ: LMB | 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 re

Investor Presentation 2024 Q3 Earnings | November 2024 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) LIMBACH HOLDINGS, INC.

LMB / Limbach Holdings, Inc. / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 UnitedStates13GLimbachHol.txt 240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. )* (Name of Issuer) Limbach Holdings Inc (Title of Class of Secur

LMB / Limbach Holdings, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

EX-99.1

EX-99.1 2 ex993.txt JOINT FILING AGREEMENT Exhibit 99.1 EXHIBIT 99.1 - JOINT FILING AGREEMENT The undersigned hereby agree that they are filing this statement jointly pursuant to Rule 13d-1(k)(1). Each of them is responsible for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but n

LMB / Limbach Holdings, Inc. / FIRST TRUST PORTFOLIOS LP - AMENDED SCHEDULE 13G Passive Investment

SC 13G/A 1 sc13g3.txt AMENDED SCHEDULE 13G UNITED STATES* SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Limbach Holdings, Inc. - (Name of Issuer) Common - (Title of Class of Securities) 53263P105 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate bo

LMB / Limbach Holdings, Inc. / BlackRock, Inc. Passive Investment

SC 13G/A 1 us53263p1057102224.txt us53263p1057102224.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: 1) Limbach Holdings, Inc. - (Name of Issuer) Common Stock - (Title of Class of Securities) 53263P105 - (CUSIP Number) September 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriat

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 3, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

Exhibit 99.1 797 COMMONWEALTH DRIVE WARRENDALE, PA 15086 P: 412.359.2100 | F: 412.359.2248 | limbachinc.com LIMBACH IS AN EQUAL OPPORTUNITY EMPLOYER Limbach Holdings Acquires Kent Island Mechanical A leading provider of building systems solutions in

Exhibit 99.1 797 COMMONWEALTH DRIVE WARRENDALE, PA 15086 P: 412.359.2100 | F: 412.359.2248 | limbachinc.com LIMBACH IS AN EQUAL OPPORTUNITY EMPLOYER Limbach Holdings Acquires Kent Island Mechanical A leading provider of building systems solutions in the Greater Washington, D.C. metro region WARRENDALE, PA - September 3, 2024 - Limbach Holdings, Inc. (Nasdaq: LMB) ("Limbach" or the "Company"), a bu

Limbach Holdings, Inc. Announces Second Quarter 2024 Results Raising 2024 Revenue and Adjusted EBITDA Guidance after Delivering Q2 Net Income of $6.0 million and Record Quarterly Adjusted EBITDA of $13.8 million

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces Second Quarter 2024 Results Raising 2024 Revenue and Adjusted EBITDA Guidance after Delivering Q2 Net Income of $6.0 million and Record Quarterly Adjusted EBITDA of $13.8 million WARRENDALE, PA – August 6, 2024 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter ended June 3

Investor Presentation 2024 Q2 Earnings | August 2024 NASDAQ: LMB NASDAQ: LMB | 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 rela

Investor Presentation 2024 Q2 Earnings | August 2024 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 June 30, 2024 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

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 6, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

EX-99.1

EX-99.1 2 ex993.txt JOINT FILING AGREEMENT Exhibit 99.1 EXHIBIT 99.1 - JOINT FILING AGREEMENT The undersigned hereby agree that they are filing this statement jointly pursuant to Rule 13d-1(k)(1). Each of them is responsible for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but n

LMB / Limbach Holdings, Inc. / FIRST TRUST PORTFOLIOS LP - SCHEDULE 13G Passive Investment

UNITED STATES* SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Limbach Holdings, Inc. - (Name of Issuer) Common - (Title of Class of Securities) 53263P105 - (CUSIP Number) June 30, 2024 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

Financial Statements and Exhibits, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 13, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

LIMBACH HOLDINGS ELECTS DAVID GABOURY TO ITS BOARD OF DIRECTORS Shifts in Board Leadership Leverage Members’ Expertise and Experience

Exhibit 99.1 LIMBACH HOLDINGS ELECTS DAVID GABOURY TO ITS BOARD OF DIRECTORS Shifts in Board Leadership Leverage Members’ Expertise and Experience WARRENDALE, Pa., June 13, 2024 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), the building systems solutions firm, today announced the election of David Gaboury to its Board of Directors. With the addition of Mr. Gaboury, Limbach’s

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 13, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

Investor Presentation 2024 Q1 Earnings | May 2024 NASDAQ: LMB NASDAQ: LMB | 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

Investor Presentation 2024 Q1 Earnings | May 2024 NASDAQ: LMB NASDAQ: LMB | 2 We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Limbach Holdings, Inc. Announces First Quarter 2024 Results Quarterly Revenue from Owner Direct Relationships (“ODR”) Segment up 26.5% Year-over-Year ODR Segment Accounted for 62.4% of Revenue and 71.3% of Consolidated Gross Profit for the Quarter Re

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces First Quarter 2024 Results Quarterly Revenue from Owner Direct Relationships (“ODR”) Segment up 26.5% Year-over-Year ODR Segment Accounted for 62.4% of Revenue and 71.3% of Consolidated Gross Profit for the Quarter Record Quarterly Consolidated Gross Margin of 26.1% Quarterly Net Income of $7.6 million, up 153.5% for the period and Adjusted EB

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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, 2024 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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

ANNUAL REPORT 2023 A Building Systems Solu�ons Firm with Exper�se in Exis�ng Infrastructure for Mechanical, Electrical, and Plumbing Systems Limbach Holdings, Inc., (NASDAQ: LMB), with revenue of $516.4 million in 2023, is a building systems solution

ANNUAL REPORT 2023 A Building Systems Solu�ons Firm with Exper�se in Exis�ng Infrastructure for Mechanical, Electrical, and Plumbing Systems Limbach Holdings, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

Positioned For Sustained Growth and Returns March 2024 NASDAQ: LMB 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 expectat

exhibit992-lmbinvestorpr Positioned For Sustained Growth and Returns March 2024 NASDAQ: LMB We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

Limbach Holdings, Inc. Reports Fourth Quarter and 2023 Results Owner Direct Relationships (“ODR”) Segment Revenue up 22.8% Year-over-Year for Q4 and 21.1% for the Year ODR Segment Accounted for 55.1% of Revenue and 71.1% of Consolidated Gross Profit

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Fourth Quarter and 2023 Results Owner Direct Relationships (“ODR”) Segment Revenue up 22.8% Year-over-Year for Q4 and 21.1% for the Year ODR Segment Accounted for 55.1% of Revenue and 71.1% of Consolidated Gross Profit for the Quarter Consolidated Gross Margin Increased to 23.3% for the Quarter and 23.1% for the Year Year-end Cash and Cash Equiv

Limbach Holdings, Inc. Clawback Policy (filed herewith)

Board Approved Version Limbach Holdings, Inc. Clawback Policy (Covered Executives) The Board of Directors (the “Board”) of Limbach Holdings, Inc. (the “Company”) believes that it is in the best interests of the Company and its stockholders to adopt this Clawback Policy (this “Policy”), which provides for the recovery of certain incentive-based compensation upon the occurrence of certain events, in

Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan.

Exhibit 99.1 LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN Section 1. General. The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the “Plan”). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) give Particip

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter)

Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter) Delaware 46-5399422 (State or Other Jurisdiction of Incorporation or Organization) (I.R.S. Employer Identification No.) 797 Commonwealth Drive, Warrendale, Pennsyl

First Amendment to the Second Amended and Restated Credit Agreement, dated as of March 13, 2024, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer.

Exhibit 10.1 FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT This FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of March 13, 2024 (the “Effective Date”), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (“Borrower”), LIMBACH HOLDINGS LLC, a Delaware limited liability company (“Intermediate Holdco”), t

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) LIMBACH HOLDINGS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 13, 2024 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 13, 2024 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

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, 2023 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 specifie

Subsidiaries of the Company, filed herewith as Exhibit 21.1

EXHIBIT 21.1 Subsidiaries of Limbach Holdings, Inc. Subsidiary State of Formation Limbach Holdings LLC Delaware Limbach Facility Services LLC Delaware Harper Limbach Construction LLC Delaware Harper Limbach LLC Delaware Limbach Company LP Delaware Limbach Company LLC Delaware Jake Marshall, LLC Tennessee Coating Solutions, LLC Tennessee Acme Industrial Piping, LLC Tennessee Industrial Air, LLC Nor

LMB / Limbach Holdings, Inc. / Polar Asset Management Partners Inc. - LIMBACH HOLDINGS INC Passive Investment

SC 13G/A 1 LimbachHoldingsInc.txt LIMBACH HOLDINGS INC Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.1)* (Name of Issuer) Limbach Holdings, Inc. (Title of Class of Securities) Common stock, $0.0001 par value (CUSIP Number) 53263P105 (Date of Event Which Requires Filing of this Statement) 12/31/2023 Check the appropri

LMB / Limbach Holdings, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

LMB / Limbach Holdings, Inc. / ROYCE & ASSOCIATES LP Passive Investment

SC 13G/A 1 lmb3.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information statement pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934 (Amendment No.3) Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) Date of Event Which Requires Filing of this Statement: December 31, 2023

LMB / Limbach Holdings, Inc. / BlackRock Inc. Passive Investment

us53263p1057012924.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No: ) Limbach Holdings, Inc. - (Name of Issuer) Common Stock - (Title of Class of Securities) 53263P105 - (CUSIP Number) December 31, 2023 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

Limbach Holdings, Inc. Announces Third Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 10.3% Year-over-Year for Q3 ODR Segment Accounted for Approximately 51.5% of Revenue and 61.7% of Consolidated Gross Profit for the

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces Third Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 10.3% Year-over-Year for Q3 ODR Segment Accounted for Approximately 51.5% of Revenue and 61.7% of Consolidated Gross Profit for the Quarter Consolidated Gross Margin Increased to 24.5% in the Quarter Increase in FY 2023 Adjusted EBITDA Guidance WARRENDALE, PA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 2023 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 nam

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 8, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 1, 2023 LIMBACH HOLDINGS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 1, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings, Inc. Acquires Greensboro, NC – Based Specialty Mechanical Contractor Industrial Air, LLC

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Acquires Greensboro, NC – Based Specialty Mechanical Contractor Industrial Air, LLC WARRENDALE, PA – November 2, 2023 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced the closing of the acquisition of Industrial Air, LLC (“IA”), a specialty mechanical contractor based in Greensboro, North Carolina, for an initial enter

IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE

Exhibit 99.1 EFiled: Aug 02 2023 11:12AM EDT Transaction ID 70535413 Case No. 2023-0785- IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE ) IN RE LIMBACH HOLDINGS, INC. ) C.A. No. 2023- ) VERIFIED PETITION FOR RELIEF UNDER 8 DEL. C. § 205 Petitioner Limbach Holdings, Inc. (“Limbach” or the “Company”), by and through its undersigned counsel, brings this Petition for relief under 8 Del C. § 205 (th

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2023 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 9, 2023 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 9, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

Limbach Holdings, Inc. Announces Second Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 18.1% Year-over-Year ODR Segment Accounted for Approximately 47.1% of Revenue and 60.5% of Consolidated Gross Profit Consolidated

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces Second Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 18.1% Year-over-Year ODR Segment Accounted for Approximately 47.1% of Revenue and 60.5% of Consolidated Gross Profit Consolidated Gross Margin Increased to 22.8% Increase in FY 2023 Adjusted EBITDA Guidance WARRENDALE, PA – August 9, 2023 – Limbach Holdings,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 June 30, 2023 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

Limbach Holdings, Inc. Acquires Chattanooga, TN – Based Specialty Industrial Contractor ACME Industrial Piping, LLC

EXHIBIT 99.1 FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Acquires Chattanooga, TN – Based Specialty Industrial Contractor ACME Industrial Piping, LLC WARRENDALE, PA – July 5, 2023 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced the closing of the acquisition of Chattanooga, TN-based specialty industrial contractor ACME Industrial Piping, LLC (“ACME”) for an ent

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 3, 2023 LIMBACH HOLDINGS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 3, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fil

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 22, 2023 LIMBACH HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 22, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

Conformed Second Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on June 23, 2023).

limbach-secondamendedand LEGAL\64260436\1 LEGAL\64260436\3 Exhibit 3.1 CONFORMED VERSION OF SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF 1347 CAPITAL CORPLIMBACH HOLDINGS, INC. AS AMENDED ON JUNE 23, 2023 1347 Capital CorpLIMBACH HOLDINGS, INC., a corporation existing under the laws of the State of Delaware (the “Corporation”), hereby certifies as follows: 1. The present name of the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 LIMBACH HOLDINGS, INC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission File

The Second Amended and Restated Credit Agreement dated as of May 4, 2023, by and among Limbach Facility Services LLC, a Delaware limited liability company, Limbach Holdings LLC, a Delaware limited liability company, and the direct and indirect subsidiaries of the Borrower from time to time party to the agreement, as Guarantors, the various institutions from time to time party to the agreement, as Lenders, and Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation, as Administrative Agent and L/C Issuer (incorporated by reference to Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on May 8, 2023).

Execution Version Exhibit 10.6 Second Amended and Restated Credit Agreement among Limbach Facility Services LLC, a Delaware limited liability company, as Borrower, Limbach Holdings LLC, a Delaware limited liability company, as Intermediate Holdco, The Guarantors from time to time party hereto, The Lenders from time to time party hereto, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust

Limbach Holdings, Inc. Announces First Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 36.9% Year-over-Year ODR Segment Accounted for Approximately 48.5% of Revenue and 60.7% of Consolidated Gross Profit Consolidated G

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces First Quarter 2023 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 36.9% Year-over-Year ODR Segment Accounted for Approximately 48.5% of Revenue and 60.7% of Consolidated Gross Profit Consolidated Gross Margin Increased to 21.7% WARRENDALE, PA – May 8, 2023 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 HOLDINGS, INC. (Exact name of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

Limbach Holdings, Inc., (NASDAQ: LMB), with revenue of $496.8 million in 2022, is a building systems solutions firm with expertise in the design, prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning ("HVA

a2022annualreportfinal4 Limbach Holdings, Inc., (NASDAQ: LMB), with revenue of $496.8 million in 2022, 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

Amended and Restated Bylaws, marked to show revisions effective as of April 14, 2023.

limbachbylawsmark-upfrom AMENDED AND RESTATED BYLAWS OF LIMBACH HOLDINGS, INC., A DELAWARE CORPORATION Adopted August 26April 14, 2021 2023 ARTICLE I OFFICES SECTION 1.1 REGISTERED OFFICE. The registered office of Limbach Holdings, Inc. (formerly 1347 Capital Corp.) (the “Corporation”) within the State of Delaware shall be located at either (a) the principal place of business of the Corporation in

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 14, 2023 LIMBACH HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 14, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on April 17, 2023).

legal47889539v16limbachb LEGAL\47889539\16 AMENDED AND RESTATED BYLAWS OF LIMBACH HOLDINGS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 8, 2023 LIMBACH HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 8, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter)

Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter) Delaware 46-5399422 (State or Other Jurisdiction of Incorporation or Organization) (I.R.S. Employer Identification No.) 797 Commonwealth Drive, Warrendale, Pennsyl

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

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 specifie

Limbach Holdings Reports Fourth Quarter and Fiscal Year 2022 Results Continued Growth in Owner Direct Relationships (“ODR”) Segment Revenue; Up 63.7% compared to the 4th Quarter of 2021 Consolidated Gross Margin for the Quarter was 20.4% and for the

FOR IMMEDIATE RELEASE Limbach Holdings Reports Fourth Quarter and Fiscal Year 2022 Results Continued Growth in Owner Direct Relationships (“ODR”) Segment Revenue; Up 63.

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) LIMBACH HOLDINGS, INC.

LMB / Limbach Holdings Inc / Polar Asset Management Partners Inc. - LIMBACH Passive Investment

SC 13G 1 Limbach.txt LIMBACH Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.)* (Name of Issuer) Limbach Holdings Inc (Title of Class of Securities) Common stock, $0.0001 par value (CUSIP Number) 53263P105 (Date of Event Which Requires Filing of this Statement) 12/31/2022 Check the appropriate box to designate the rule

Limbach Facility Services LLC Performance Bonus Plan for Executives (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on February 2, 2023).

EXHIBIT 10.1 LIMBACH FACILITY SERVICES LLC1 Performance Award Summary - Corporate Senior Management Short Term Incentive Plan (STIP) – Cash Bonus Objectives and Key Performance Indicators January 1, 20XX to December 31, 20XX Name: Date: Adjusted EBITDA Measure Weighting = 100% oAdjusted EBITDA Award % (GE%) = As detailed below: Performance Goals and Payout as a % of allocated Incentive Target Perf

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 1, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

LMB / Limbach Holdings Inc / ROYCE & ASSOCIATES LP Passive Investment

SC 13G/A 1 lmb2.txt SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information statement pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934 (Amendment No.2) Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) Date of Event Which Requires Filing of this Statement: December 31, 2022

Promotion Letter dated January 17, 2023- Jay Sharp (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on January 17, 2023).

Exhibit 10.2 January 17, 2023 Jay Sharp [Address] RE: Promotion to President of Limbach Dear Jay, It is with pleasure that I confirm your promotion to President of the following Limbach Holdings Inc. entities: Limbach Company LLC, Limbach Company LP, Jake Marshall LLC and Limbach Facility & Project Solutions LLC (the “Company,” and collectively with Limbach Holdings, Inc. (the “Parent”) and the Co

Employment Transition Agreement dated January 17, 2023, by and between Limbach Facility Services LLC, Limbach Holdings, Inc. and Charles A. Bacon, III (incorporated by reference to Exhibit 10.4 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on January 17, 2023).

Exhibit 10.4 EMPLOYMENT TRANSITION AGREEMENT THIS EMPLOYMENT TRANSITION AGREEMENT (including the Exhibits and Schedules hereto, this “Agreement”), dated as of January 17, 2023, is by and between Limbach Facility Services, LLC, a Delaware limited liability company (“Limbach Services” and the successor to 1347 Capital Corp., a Delaware corporation) (“1347”), Limbach Holdings, Inc. a Delaware corpora

Limbach Announces Leadership Transition Michael M. McCann, COO since 2019, to become CEO effective March 29, 2023 Current CEO Charlie Bacon to remain on Limbach’s Board of Directors

Exhibit 99.1 Limbach Announces Leadership Transition Michael M. McCann, COO since 2019, to become CEO effective March 29, 2023 Current CEO Charlie Bacon to remain on Limbach’s Board of Directors WARRENDALE, PA — January 17, 2023—Limbach Holdings, Inc. (NASDAQ: LMB) ("Limbach" or the "Company") announced today the appointment of Michael M. McCann as Chief Executive Officer (“CEO”), effective March

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 17, 2023 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Promotion Letter dated January 17, 2023- Nick Angerosa (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on January 17, 2023).

Exhibit 10.3 January 17, 2023 Nick Angerosa [Address] RE: Promotion to President of Harper Dear Nick, It is with pleasure that I confirm your promotion to President of the following Limbach Holdings Inc entities: Harper Limbach LLC and Harper Limbach Construction LLC (the “Company,” and collectively with the Limbach Holdings, Inc. (“Parent”) and the Company’s direct and indirect subsidiaries, the

Promotion Letter dated January 17, 2023 -Michael M. McCann (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on January 17, 2023).

Exhibit 10.1 January 17, 2023 Michael M. McCann [Address] RE: Promotion to Chief Executive Officer Dear Mike, It is with pleasure that I confirm your promotion to President and Chief Executive Officer of Limbach Holdings, Inc. (the “Parent”) and its wholly-owned subsidiary, Limbach Facility Services LLC (the “Company,” and collectively with the Parent and the Company’s direct and indirect subsidia

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 9, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings, Inc. Reports Third Quarter 2022 Results Revenue from Owner Direct Relationships (“ODR”) Segment up 52.2% Year-over-Year ODR Segment Accounted for Approximately 48.8% of Revenue and 61.2% of Consolidated Gross Profit Consolidated Gro

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Third Quarter 2022 Results Revenue from Owner Direct Relationships (?ODR?) Segment up 52.2% Year-over-Year ODR Segment Accounted for Approximately 48.8% of Revenue and 61.2% of Consolidated Gross Profit Consolidated Gross Margin Increased to 20.3% Company Tightens Revenue Guidance and Increases Adjusted EBITDA Guidance Conference Call Scheduled

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 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 nam

NASDAQ: LMB An integrated building systems solutions firm Essential ● Diverse ● Evolving INVESTOR PRESENTATION • OCTOBER 2022 Forward Looking Statements We make forward-looking statements in this presentation within the meaning of the Private Securit

lmbinvestorpresentationo NASDAQ: LMB An integrated building systems solutions firm Essential ● Diverse ● Evolving INVESTOR PRESENTATION • OCTOBER 2022 Forward Looking Statements We make forward-looking statements in this presentation within the meaning of the Private Securities Litigation Reform Act of 1995.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 13, 2022 LIMBACH HOLDINGS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 13, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 28, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissi

10.3 – Second Amendment and Waiver to the Amended and Restated Credit Agreement, dated as of September 28, 2022, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer.

Exhibit 10.3 SECOND AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT This SECOND AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of September 28, 2022 (the ?Effective Date?), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (?Borrower?), LIMBACH HOLDINGS LLC, a Delaware limited liability company (?Intermedia

Exhibit 10.2† – Lease Agreement by and between Featherstone St Pontiac MI LLC and Limbach Company, LLC, dated September 29, 2022 (including the form of Guaranty), filed herewith.

Exhibit 10.2 LEASE AGREEMENT BY AND BETWEEN FEATHERSTONE ST PONTIAC MI LLC, AS LANDLORD AND limbach company, llc, AS TENANT TABLE OF CONTENTS ARTICLE I 1 PREMISES 1 ARTICLE II 2 TERM 2 ARTICLE III 2 BASE RENT 3 ARTICLE IV 4 TAXES, UTILITIES, LEGAL REQUIREMENTS, NET LEASE ARTICLE V 6 USE OF PREMISES 6 ARTICLE VI 7 ASSIGNMENT AND SUBLETTING 7 ARTICLE VII 8 MAINTENANCE AND REPAIRS 8 ARTICLE VIII 11 A

Limbach Holdings Announces Share Repurchase Program Authorization The program authorizes up to $2.0 Million of Common Stock to be repurchased

Exhibit 99.1 FOR IMMEDIATE RELEASE Limbach Holdings Announces Share Repurchase Program Authorization The program authorizes up to $2.0 Million of Common Stock to be repurchased WARRENDALE, PA. ? September 30, 2022 - Limbach Holdings, Inc. (NASDAQ: LMB) (?Limbach? or the ?Company?) today announced that its Board of Directors approved a share repurchase program with an authorization to purchase up t

Exhibit 10.1† – Purchase Agreement by and between Limbach Company, LLC and Royal Oak Acquisitions LLC, dated September 29, 2022, filed herewith

Exhibit 10.1 PURCHASE AGREEMENT THIS PURCHASE AGREEMENT (this "Agreement") is made this 29th day of September, 2022 (the "Effective Date"), by and between Limbach company llc, a Delaware limited liability company with an address of 926 Featherstone Street, Pontiac, Michigan 48342 ("Seller"), and ROYAL OAK ACQUISITIONS LLC, a New York limited liability company with an address of 600 East Avenue, Su

Limbach Holdings, Inc. Reports Second Quarter 2022 Results Revenue from Owner Direct Relationships Segment (“ODR”) up 48.7% year-over-year ODR Segment Accounted for Approximately 42.9% of Revenue and 59.2% of Consolidated Gross Profit Net Income of $

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Second Quarter 2022 Results Revenue from Owner Direct Relationships Segment (?ODR?) up 48.7% year-over-year ODR Segment Accounted for Approximately 42.9% of Revenue and 59.2% of Consolidated Gross Profit Net Income of $0.9 million, an 18.3% increase year-over-year Conference Call Scheduled for 9:00 am ET on August 10, 2022 WARRENDALE, PA ? Augus

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 9, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 June 30, 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

First Amendment and Waiver to the Amended and Restated Credit Agreement, dated as of May 5, 2022, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer, filed herewith as Exhibit 10.1.

EXHIBIT 10.1 FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT This FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of May 5, 2022 (the “Effective Date”), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (“Borrower”), LIMBACH HOLDINGS LLC, a Delaware limited liability company (“Intermediate Holdco

2022 Amended and Restated Omnibus Incentive Plan

Exhibit 10.2 LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN Section 1. General. The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the “Plan”). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) give Particip

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 22, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 5, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission File

First Amendment and Waiver to the Amended and Restated Credit Agreement, dated as of May 5, 2022, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer, filed herewith as Exhibit 10.1.

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, 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

FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT

EXHIBIT 10.1 FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT This FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of May 5, 2022 (the ?Effective Date?), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (?Borrower?), LIMBACH HOLDINGS LLC, a Delaware limited liability company (?Intermediate Holdco

Limbach Holdings, Inc. Reports First Quarter 2022 Results Revenue from Owner Direct Relationships Segment (“ODR”) up 50.3% year-over-year ODR Segment Accounted for Approximately 54.4% of Consolidated Gross Profit Conference Call Scheduled for 9:00 am

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports First Quarter 2022 Results Revenue from Owner Direct Relationships Segment (?ODR?) up 50.3% year-over-year ODR Segment Accounted for Approximately 54.4% of Consolidated Gross Profit Conference Call Scheduled for 9:00 am ET on May 11, 2022 WARRENDALE, PA ? May 10, 2022 ? Limbach Holdings, Inc. (Nasdaq: LMB) today announced its financial results f

First Amendment and Waiver to the Amended and Restated Credit Agreement, dated as of May 5, 2022, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer.

EXHIBIT 10.1 FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT This FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT (this ?Amendment?), dated as of May 5, 2022 (the ?Effective Date?), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (?Borrower?), LIMBACH HOLDINGS LLC, a Delaware limited liability company (?Intermediate Holdco

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

LMB / Limbach Holdings Inc / ROYCE & ASSOCIATES LP Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information statement pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934 (Amendment No.1) Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) Date of Event Which Requires Filing of this Statement: March 31, 2022 *The remainder of this

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 16, 2022 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

Limbach Holdings Reports Fourth Quarter and Fiscal Year 2021 Results Continued Growth in Owner Direct Relationships (ODR) Segment Revenue; Up 10.3% year-over-year ODR Segment Accounted for Approximately 47.1% of Consolidated Gross Profit for FY 2021

FOR IMMEDIATE RELEASE Limbach Holdings Reports Fourth Quarter and Fiscal Year 2021 Results Continued Growth in Owner Direct Relationships (ODR) Segment Revenue; Up 10.

Subsidiaries of the Company, filed herewith as Exhibit 21.1

EXHIBIT 21.1 Subsidiaries of Limbach Holdings, Inc. Subsidiary State of Formation Limbach Holdings LLC Delaware Limbach Facility Services LLC Delaware Harper Limbach Construction LLC Delaware Harper Limbach LLC Delaware Limbach Company LP Delaware Limbach Company LLC Delaware Jake Marshall, LLC Tennessee Coating Solutions, LLC Tennessee

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

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, 2021 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 specifie

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Exhibit 99.3 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On December 2, 2021 (the ?Effective Date?), Limbach Holdings, Inc. (the ?Company? or ?Limbach?) and Limbach Facility Services LLC (?LFS?), a Delaware limited liability company and wholly-owned subsidiary of the Company, entered into a Membership Interest Purchase Agreement (the ?Purchase Agreement?) with Jake Marshall, LLC (

JAKE MARSHALL, LLC AND SUBSIDIARY CONSOLIDATED FINANCIAL STATEMENTS SEPTEMBER 30, 2021 JAKE MARSHALL, LLC AND SUBSIDIARY INDEX TO REPORT SEPTEMBER 30, 2021 ________________________________________________________________________________ PAGE INDEPEND

JAKE MARSHALL, LLC AND SUBSIDIARY CONSOLIDATED FINANCIAL STATEMENTS SEPTEMBER 30, 2021 JAKE MARSHALL, LLC AND SUBSIDIARY INDEX TO REPORT SEPTEMBER 30, 2021 PAGE INDEPENDENT ACCOUNTANT?S REVIEW REPORT 1-2 CONSOLIDATED BALANCE SHEET 3-4 CONSOLIDATED STATEMENT OF INCOME 5 CONSOLIDATED STATEMENT OF CHANGES IN MEMBERS? EQUITY 6 CONSOLIDATED STATEMENT OF CASH FLOWS 7 NOTES TO CONSOLIDATED FINANCIAL STAT

JAKE MARSHALL, LLC AND SUBSIDIARY CONSOLIDATED FINANCIAL STATEMENTS DECEMBER 31, 2020 JAKE MARSHALL, LLC AND SUBSIDIARY INDEX TO REPORT DECEMBER 31, 2020 ________________________________________________________________________________ PAGE INDEPENDEN

JAKE MARSHALL, LLC AND SUBSIDIARY CONSOLIDATED FINANCIAL STATEMENTS DECEMBER 31, 2020 JAKE MARSHALL, LLC AND SUBSIDIARY INDEX TO REPORT DECEMBER 31, 2020 PAGE INDEPENDENT AUDITOR?S REPORT 1-2 CONSOLIDATED BALANCE SHEET 3-4 CONSOLIDATED STATEMENT OF INCOME 5 CONSOLIDATED STATEMENT OF CHANGES IN MEMBERS? EQUITY 6 CONSOLIDATED STATEMENT OF CASH FLOWS 7 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 8-14

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No.1) CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 2, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorpo

LMB / Limbach Holdings Inc / RENAISSANCE TECHNOLOGIES LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* LIMBACH HOLDINGS, INC. - (Name of Issuer) Common Stock, par value $0.0001 per share - (Title of Class of Securities) 53263P105 - (CUSIP Number) December 31, 2021 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desig

LMB / Limbach Holdings Inc / Polar Asset Management Partners Inc. - FORM SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Limbach Holdings, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 53263P105 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the

LMB / Limbach Holdings Inc / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

LMB / Limbach Holdings Inc / ROYCE & ASSOCIATES LP Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information statement pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934 (Amendment No.) Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) Date of Event Which Requires Filing of this Statement: December 31, 2021 *The remainder of th

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 2, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

9 Key Considerations / Closing Comments Excellent strategic fit across all vectors Go - to - market strategy and business model supports Limbach’s focus on ODR Carefully structured to be immediately accretive and appropriately capitalized Focus will

Acquisition of Jake Marshall, LLC December 2021 Diverse ? Evolving ? Essential 1 Exhibit 99.

LIMBACH HOLDINGS ACQUIRES JAKE MARSHALL, LLC, A SPECIALTY MECHANICAL CONTRACTOR Chattanooga, TN – Based Specialty Mechanical Contractor Has Been in Operation Since 1930 Conference Call Scheduled For 8:30 a.m. ET on December 3, 2021

Exhibit 99.1 FOR IMMEDIATE RELEASE LIMBACH HOLDINGS ACQUIRES JAKE MARSHALL, LLC, A SPECIALTY MECHANICAL CONTRACTOR Chattanooga, TN ? Based Specialty Mechanical Contractor Has Been in Operation Since 1930 Conference Call Scheduled For 8:30 a.m. ET on December 3, 2021 PITTSBURGH, PA, - December 3, 2021 - Limbach Holdings, Inc. (Nasdaq: LMB) (?Limbach?), an integrated building systems solutions firm

The Amended and Restated Credit Agreement, dated as of December 2, 2021, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Guarantors party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer, Bank of the West, as Documentation Agent and M&T Bank, as Syndication Agent (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-36541), filed with the SEC on December 3, 2021).

Exhibit 10.1 Execution Version Amended and Restated Credit Agreement among Limbach Facility Services LLC, a Delaware limited liability company, as Borrower, Limbach Holdings LLC, a Delaware limited liability company, as Intermediate Holdco, The Guarantors from time to time party hereto, The Lenders from time to time party hereto, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financi

Membership Interest Purchase Agreement, dated as of December 2, 2021, by and between Jake Marshal, LLC, Coating Solutions, LLC, Richard L. Pollard, Matthew S. Pollard, Limbach Holdings, Inc. and Limbach Facility Services LLC. (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K (File No. 001-36541), filed with the SEC on December 3, 2021).

Exhibit 2.1 EXECUTION VERSION MEMBERSHIP INTEREST PURCHASE AGREEMENT by and among RICHARD L. POLLARD AND MATTHEW S. POLLARD, JAKE MARSHALL, LLC, COATING SOLUTIONS, LLC, LIMBACH HOLDINGS, INC. and LIMBACH FACILITY SERVICES LLC dated as of December 2, 2021 TABLE OF CONTENTS ARTICLE I DEFINITIONS 1 ARTICLE II PURCHASE AND SALE 9 Section 2.01 Purchase and Sale 9 Section 2.02 Purchase Price 9 Section 2

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 22, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

Limbach Holdings, Inc. Reports Third Quarter 2021 Results Consolidated Revenue of $129.2 million Revenue from Owner Direct Relationships Segment (ODR) up 17.6% for the year-over-year quarter ODR Segment Accounted for Approximately 48% of Consolidated

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Third Quarter 2021 Results Consolidated Revenue of $129.2 million Revenue from Owner Direct Relationships Segment (ODR) up 17.6% for the year-over-year quarter ODR Segment Accounted for Approximately 48% of Consolidated Gross Profit Gross Margins Improved to 18.9%; Diluted EPS of $0.38 Conference Call Scheduled for 9:00 am ET on November 11, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 2021 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 nam

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 10, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

$100,000,000 Limbach Holdings, Inc. Common Stock Preferred Stock Senior Debt Securities Subordinated Debt Securities Depositary Shares

Filed Pursuant to Rule 424(b)(3) Registration No. 333-259305 PROSPECTUS $100,000,000 Limbach Holdings, Inc. Common Stock Preferred Stock Senior Debt Securities Subordinated Debt Securities Depositary Shares Units Warrants We may from time to time offer up to $100,000,000 of the securities listed above, in each case in one or more offerings in amounts, at prices, and on terms determined at the time

Limbach Holdings, Inc. 1251 Waterfront Place, Suite 201 Pittsburgh, Pennsylvania 15222

Limbach Holdings, Inc. 1251 Waterfront Place, Suite 201 Pittsburgh, Pennsylvania 15222 September 13, 2021 VIA EDGAR Mr. Ronald E. Alper, Attorney Division of Corporation Finance Office of Real Estate and Construction United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Re: Limbach Holdings, Inc. Registration Statement on Form S-3 Filed September 3, 2021 File N

LETTER

United States securities and exchange commission logo September 10, 2021 Charles A Bacon, III Chief Executive Officer Limbach Holdings, Inc.

As filed with the Securities and Exchange Commission on September 3, 2021

As filed with the Securities and Exchange Commission on September 3, 2021 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter)

Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter) Delaware 46-5399422 (State or Other Jurisdiction of Incorporation or Organization) (I.R.S. Employer Identification No.) 1251 Waterfront Place, Suite 201 Pittsburgh

Amended and Restated Bylaws, adopted as of April 14, 2023 (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the SEC on April 17, 2023).

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF LIMBACH HOLDINGS, INC., A DELAWARE CORPORATION Adopted August 26, 2021 ARTICLE I OFFICES SECTION 1.1 REGISTERED OFFICE. The registered office of Limbach Holdings, Inc. (formerly 1347 Capital Corp.) (the ?Corporation?) within the State of Delaware shall be located at either (a) the principal place of business of the Corporation in the State of Delaware or

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 26, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings, Inc. Announces Appointment of Linda G. Alvarado to the Board of Directors

EXHIBIT 99.1 FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Announces Appointment of Linda G. Alvarado to the Board of Directors PITTSBURGH, PA. ? September 1, 2021 - Limbach Holdings, Inc. (NASDAQ: LMB) (?Limbach? or the ?Company?) announced today the appointment of Linda G. Alvarado to the Company?s Board of Directors, effective as of August 26, 2021. Ms. Alvarado brings a wealth of experience in

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 12, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan.

Exhibit 10.1 LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN Section 1. General. The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the ?Plan?). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company?s objectives; (b) give Particip

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 June 30, 2021 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

Limbach Holdings, Inc. Reports Second Quarter 2021 Results Consolidated Revenue of $121.0 Million Driven by Continued Growth in Owner Direct Relationships Segment Gross Margins Improved to 15.4%; Diluted EPS of $0.07 Conference Call Scheduled for 9:0

FOR IMMEDIATE RELEASE Limbach Holdings, Inc. Reports Second Quarter 2021 Results Consolidated Revenue of $121.0 Million Driven by Continued Growth in Owner Direct Relationships Segment Gross Margins Improved to 15.4%; Diluted EPS of $0.07 Conference Call Scheduled for 9:00 am ET on August 13, 2021 PITTSBURGH, PA ? August 12, 2021 ? Limbach Holdings, Inc. (Nasdaq: LMB) today announced its financial

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 16, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fi

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 9, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fil

Investor Presentation June 2021 Diverse භ Evolving භ Essential 1

EX-99.1 2 tm2119101d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Investor Presentation June 2021 Diverse භ Evolving භ Essential 1 Forward Looking Statements 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 limita

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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, 2021 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

Limbach Holdings Reports First Quarter 2021 Results Gross Margin Increases to 15.2% as Owner-Direct Shift Accelerates Conference Call Scheduled for 10:00 am ET on May 14, 2021

EX-99.1 2 a2021331ex991pr.htm EX-99.1 FOR IMMEDIATE RELEASE Limbach Holdings Reports First Quarter 2021 Results Gross Margin Increases to 15.2% as Owner-Direct Shift Accelerates Conference Call Scheduled for 10:00 am ET on May 14, 2021 PITTSBURGH, PA – May 14, 2021 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”) today announced its financial results for the quarter ended March

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 14, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission Fil

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

Annual Report - 10-K

Table of Contents 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, 2020 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 regi

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 25, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission F

Description of Securities (incorporated by reference to Exhibit 4.7 to the Company's Current Report on Form 10-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on March 25, 2021).

EX-4.7 2 legal51359874v1limbach-d.htm EX-4.7 Exhibit 4.7 LEGAL\51239713\3 LIMBACH HOLDINGS, INC. DESCRIPTION OF SECURITIES The following summary of certain provisions of the securities of Limbach Holdings, Inc. (“Limbach,” “we,” “our” or the “Company”) does not purport to be complete. You should refer to our Certificate of Incorporation, Bylaws, the Warrant Agreement, dated as of July 15, 2014, by

Limbach Holdings Reports Fourth Quarter and Fiscal Year 2020 Results Substantial Improvement in Net Income with Diluted EPS of $0.72; Net Cash Provided by Operating Activities of $39.8 million Conference Call Scheduled for 9:00 am ET on March 26, 202

FOR IMMEDIATE RELEASE Limbach Holdings Reports Fourth Quarter and Fiscal Year 2020 Results Substantial Improvement in Net Income with Diluted EPS of $0.

Limbach Holdings Closes on New Credit Facilities

EX-99.1 3 tm217862d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Limbach Holdings Closes on New Credit Facilities PITTSBURGH, PA – February 25, 2021 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), a provider of building infrastructure services, with an expertise in the design, installation and maintenance of HVAC and mechanical, electrical and plumbing systems fo

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 24, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

Credit Agreement, dated February 24, 2021, by and among Limbach Facility Services, LLC, Limbach Holdings LLC, the other Guarantors party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer, Bank of the West, as Documentation Agent and M&T Bank, as Syndication Agent (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K (File No. 001-36541), filed with the SEC on February 25, 2021).

EX-10.1 2 tm217862d1ex10-1.htm EXHIBIT 10.1 Exhibit 10.1 Execution Version Credit Agreement among Limbach Facility Services LLC, a Delaware limited liability company, as Borrower, Limbach Holdings LLC, a Delaware limited liability company, as Intermediate Holdco, The Guarantors from time to time party hereto, The Lenders from time to time party hereto, Wheaton Bank & Trust Company, N.A., a subsidi

SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Limbach Holdings, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) December 31, 2020 (Date of Eve

SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Limbach Holdings, Inc.

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* Limbach Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 53263P105 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 12, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

Limbach Holdings Closes Public Offering of Common Stock

Exhibit 99.1 FOR IMMEDIATE RELEASE Limbach Holdings Closes Public Offering of Common Stock PITTSBURGH, PA ? February 12, 2021 ? Limbach Holdings, Inc. (Nasdaq: LMB) (?Limbach? or the ?Company?), a provider of building infrastructure services, with an expertise in the design, installation and maintenance of HVAC and mechanical, electrical, and plumbing systems for a diversified group of commercial

Limbach Holdings Prices Public Offering of Common Stock

Exhibit 99.2 FOR IMMEDIATE RELEASE Limbach Holdings Prices Public Offering of Common Stock PITTSBURGH, PA – February 10, 2021 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), a provider of building infrastructure services, with an expertise in the design, installation and maintenance of HVAC and mechanical, electrical, and plumbing systems for a diversified group of commercial

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 9, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

Limbach Holdings Announces Proposed Public Offering of Common Stock

EX-99.1 4 tm215692d5ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Limbach Holdings Announces Proposed Public Offering of Common Stock PITTSBURGH, PA – February 9, 2021 – Limbach Holdings, Inc. (Nasdaq: LMB) (“Limbach” or the “Company”), a provider of building infrastructure services, with an expertise in the design, installation and maintenance of HVAC and mechanical, electrical, and

SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 LIMBACH HOLDINGS, INC. - (Name of Issuer) Common Stock, par value $0.0001 per share - (Title of Class of Securities) 53263P105 - (CUSIP Number) December 1, 2020 - (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursua

Limbach Holdings, Inc. 1,783,500 Shares of Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-232406 Registration No. 333-252929 PROSPECTUS SUPPLEMENT (To Prospectus Dated August 6, 2019) Limbach Holdings, Inc. 1,783,500 Shares of Common Stock This is a public offering of shares of common stock of Limbach Holdings, Inc. We are offering 1,783,500 shares of our common stock, par value $0.0001 per share, directly to investors in this offer

Underwriting Agreement, dated as of February 10, 2021, by and among Limbach Holdings, Inc. and Lake Street Capital Markets, LLC

EX-1.1 2 tm215692d5ex1-1.htm EXHIBIT 1.1 Exhibit 1.1 Confidential 1,783,500 Shares1 Limbach Holdings, Inc. Common Stock, par value $0.0001 per share UNDERWRITING AGREEMENT February 10, 2021 Lake Street Capital Markets, LLC 920 Second Avenue South, Suite 700 Minneapolis, Minnesota 55402 Ladies and Gentlemen: Limbach Holdings, Inc., a Delaware corporation (the “Company”), proposes to sell to the sev

Subject to Completion, dated February 9, 2021

Filed Pursuant to Rule 424(b)(5) Registration No. 333-232406 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus do not constitute an offer to sell these securities and we are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted. Sub

Results of Operations and Financial Condition, Other Events - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 9, 2021 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commission

- FORM S-3MEF

As filed with the Securities and Exchange Commission on February 10, 2021 Registration No.

SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) * Limbach Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value per share (Title of Class of Securities) 53263P105 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the r

Limbach Holdings, Inc. 4,499,632 Shares of Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-232406 PROSPECTUS SUPPLEMENT (To Prospectus Dated August 6, 2019) Limbach Holdings, Inc. 4,499,632 Shares of Common Stock This prospectus supplement relates to the issuance by us of up to 4,499,632 shares of common stock, par value $0.0001 per share, consisting of (i) 2,300,000 shares of common stock issuable upon the exercise of 4,600,000 warr

Other Events, Financial Statements and Exhibits - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 11, 2020 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

Annual Report - 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 2) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 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 re

LMB / Limbach Holdings, Inc. / LONG MEADOW HOLDINGS LP - SC 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Limbach Holdings, Inc.

JOINT FILING AGREEMENT

EX-99.1 2 d63439dex991.htm EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a D

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 7)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a Delaware corporation, and fu

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 6)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

Limbach Holdings Reports Third Quarter 2020 Results Third Quarter 2020 Revenue Increases 10.6% over prior year; Diluted EPS of $0.31; Third Quarter Net Cash Provided by Operating Activities of $12.8 million Increasing Adjusted EBITDA Guidance for Fis

FOR IMMEDIATE RELEASE Limbach Holdings Reports Third Quarter 2020 Results Third Quarter 2020 Revenue Increases 10.

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 12, 2020 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

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 September 30, 2020 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 nam

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a Delaware corporation, and fu

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 5)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a Delaware corporation, and fu

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 3)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a Delaware corporation, and fu

September 11, 2020 (File No. 333-248736)

Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LIMBACH HOLDINGS, INC. (Exact name of Registrant as specified in its charter) Delaware 46-5399422 (State or Other Jurisdiction of Incorporation or Organization) (I.R.S. Employer Identification No.) 1251 Waterfront Place, Suite 201 Pittsburgh

Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (incorporated by reference to Exhibit 99.1 to the Company's Registration Statement on Form S-8 (File No. 333-232407) filed with the U.S. Securities and Exchange Commission on September 11, 2020).

proxyexercptappa APPENDIX A LIMBACH HOLDINGS, INC. AMENDED AND RESTATED OMNIBUS INCENTIVE PLAN Section 1. General. The name of the Plan is the Limbach Holdings, Inc. Amended and Restated Omnibus Incentive Plan (the “Plan”). The Plan intends to: (a) encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b

LMB / Limbach Holdings, Inc. / KINGSWAY FINANCIAL SERVICES INC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) Limbach Holdings, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 53263P105 (CUSIP Number) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ¨ Rule 13d-1(b) x Rule 13d-

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 4, 2020 LIMBACH HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-36541 46-5399422 (State or other jurisdiction of incorporation) (Commissio

LMB / Limbach Holdings, Inc. / Pratt Brian - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* LIMBACH HOLDINGS, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 53263P105 (CUSIP Number) Brian Pratt 5950 Berkshire Ln, Ste. 800 Dallas, Texas 75225 Tel: (214) 220-3423 With a Copy to: Jeffrey P. Berg Baker

JOINT FILING AGREEMENT

EX-99.1 2 d50035dex991.htm EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the shares of Common Stock, $0.0001 par value per share, of Limbach Holdings, Inc., a D

Letter to the Company Brian Pratt 5950 Berkshire Lane Suite 800 Dallas, TX 75225

EX-99.2 3 d50035dex992.htm EX-99.2 EXHIBIT 2 Letter to the Company Brian Pratt 5950 Berkshire Lane Suite 800 Dallas, TX 75225 August 24, 2020 Board of Directors Limbach Holdings, Inc. 5102 W. Laurel Street, Suite 800 Tampa, Florida 33607 Dear Board of Directors: On Friday, July 31st, 2020, we submitted a letter which described a proposal (the “Term Sheet”) outlining the terms under which we would

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 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