<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001965562</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001606163</issuerCik>
            <issuerName>LIMBACH HOLDINGS, INC.</issuerName>
            <secFileNumber>001-36541</secFileNumber>
            <issuerAddress>
                <ns2:street1>797 Commonwealth Drive</ns2:street1>
                <ns2:city>Warrendale</ns2:city>
                <ns2:stateOrCountry>PA</ns2:stateOrCountry>
                <ns2:zipCode>15086</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>14123592100</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>JAY SHARP</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>2000</noOfUnitsSold>
            <aggregateMarketValue>283680.00</aggregateMarketValue>
            <noOfUnitsOutstanding>11624639</noOfUnitsOutstanding>
            <approxSaleDate>06/13/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/14/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2000</amountOfSecuritiesAcquired>
            <paymentDate>03/14/2024</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>06/13/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/14/2025</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Jay Sharp</signature>
        </noticeSignature>
    </formData>
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144
0001965562
XXXXXXXX
LIVE
0001606163
LIMBACH HOLDINGS, INC.
001-36541
797 Commonwealth Drive
Warrendale
PA
15086
14123592100
JAY SHARP
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
2000
283680.00
11624639
06/13/2025
NASDAQ
Common
03/14/2024
Performance Stock Units
Issuer
N
2000
03/14/2024
N/A
Y
06/13/2025
03/14/2025
/s/ Jay Sharp