<?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>0001590177</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001039399</issuerCik>
            <issuerName>FORMFACTOR, INC.</issuerName>
            <secFileNumber>000-50307</secFileNumber>
            <issuerAddress>
                <ns2:street1>7005 Southfront Road</ns2:street1>
                <ns2:city>Livermore</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>94551</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(925) 290-4000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MIKE SLESSOR</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
                <relationshipToIssuer>Director</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>4000</noOfUnitsSold>
            <aggregateMarketValue>136106.80</aggregateMarketValue>
            <noOfUnitsOutstanding>77076642</noOfUnitsOutstanding>
            <approxSaleDate>07/01/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/19/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>4000</amountOfSecuritiesAcquired>
            <paymentDate>07/19/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MIKE SLESSOR</name>
                <address>
                    <ns2:street1>7005 Southfront Road</ns2:street1>
                    <ns2:city>Livermore</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94551</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/02/2025</saleDate>
            <amountOfSecuritiesSold>4000</amountOfSecuritiesSold>
            <grossProceeds>119304.40</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MIKE SLESSOR</name>
                <address>
                    <ns2:street1>7005 Southfront Road</ns2:street1>
                    <ns2:city>Livermore</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94551</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/01/2025</saleDate>
            <amountOfSecuritiesSold>4000</amountOfSecuritiesSold>
            <grossProceeds>126884.40</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>07/01/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>11/20/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Mike (Michael) David Slessor</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001590177
XXXXXXXX
LIVE
0001039399
FORMFACTOR, INC.
000-50307
7005 Southfront Road
Livermore
CA
94551
(925) 290-4000
MIKE SLESSOR
Officer
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
4000
136106.80
77076642
07/01/2025
NASDAQ
Common
07/19/2022
Performance Shares
ISSUER
N
4000
07/19/2022
Not Applicable
N
MIKE SLESSOR
7005 Southfront Road
Livermore
CA
94551
Common
06/02/2025
4000
119304.40
MIKE SLESSOR
7005 Southfront Road
Livermore
CA
94551
Common
05/01/2025
4000
126884.40
07/01/2025
11/20/2023
/s/ Mike (Michael) David Slessor