<?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>0001772837</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001350653</issuerCik>
            <issuerName>ALPHATEC HOLDINGS, INC.</issuerName>
            <secFileNumber>000-52024</secFileNumber>
            <issuerAddress>
                <ns2:street1>1950 Camino Vida Roble</ns2:street1>
                <ns2:city>CARLSBAD</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>92008</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>760-431-9286</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DAVID SPONSEL</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>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>2500</noOfUnitsSold>
            <aggregateMarketValue>37500.00</aggregateMarketValue>
            <noOfUnitsOutstanding>136300664</noOfUnitsOutstanding>
            <approxSaleDate>01/16/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>04/22/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2500</amountOfSecuritiesAcquired>
            <paymentDate>04/22/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>DAVID SPONSEL</name>
                <address>
                    <ns2:street1>1950 Camino Vida Roble</ns2:street1>
                    <ns2:city>CARLSBAD</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>92008</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/21/2023</saleDate>
            <amountOfSecuritiesSold>2500</amountOfSecuritiesSold>
            <grossProceeds>37500.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>01/16/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>09/14/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ David Paul Sponsel</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001772837
XXXXXXXX
LIVE
0001350653
ALPHATEC HOLDINGS, INC.
000-52024
1950 Camino Vida Roble
CARLSBAD
CA
92008
760-431-9286
DAVID SPONSEL
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
2500
37500.00
136300664
01/16/2024
NASDAQ
COMMON
04/22/2021
Restricted Stock
ISSUER
N
2500
04/22/2021
Not Applicable
N
DAVID SPONSEL
1950 Camino Vida Roble
CARLSBAD
CA
92008
Common
12/21/2023
2500
37500.00
01/16/2024
09/14/2023
/s/ David Paul Sponsel