<?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>0001851495</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001637873</issuerCik>
            <issuerName>ACV AUCTIONS, INC.</issuerName>
            <secFileNumber>001-40256</secFileNumber>
            <issuerAddress>
                <ns2:street1>640 Ellicott St., Suite 321</ns2:street1>
                <ns2:city>Buffalo</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>14203</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>8005534070</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MICHAEL WATERMAN</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>45162</noOfUnitsSold>
            <aggregateMarketValue>953369.82</aggregateMarketValue>
            <noOfUnitsOutstanding>158276243</noOfUnitsOutstanding>
            <approxSaleDate>01/07/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/07/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>30000</amountOfSecuritiesAcquired>
            <paymentDate>01/07/2025</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/01/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>15162</amountOfSecuritiesAcquired>
            <paymentDate>01/01/2024</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for MICHAEL WATERMAN</name>
                <address>
                    <ns2:street1>640 Ellicott St., Suite 321</ns2:street1>
                    <ns2:city>Buffalo</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>14203</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>12/10/2024</saleDate>
            <amountOfSecuritiesSold>15000</amountOfSecuritiesSold>
            <grossProceeds>327091.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for MICHAEL WATERMAN</name>
                <address>
                    <ns2:street1>640 Ellicott St., Suite 321</ns2:street1>
                    <ns2:city>Buffalo</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>14203</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>11/12/2024</saleDate>
            <amountOfSecuritiesSold>21483</amountOfSecuritiesSold>
            <grossProceeds>449268.36</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for MICHAEL WATERMAN</name>
                <address>
                    <ns2:street1>640 Ellicott St., Suite 321</ns2:street1>
                    <ns2:city>Buffalo</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>14203</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>10/15/2024</saleDate>
            <amountOfSecuritiesSold>18001</amountOfSecuritiesSold>
            <grossProceeds>338278.39</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The 30,000 securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
The 15,162 securities to be sold were acquired upon the vesting of restricted stock units on 01/01/2024 and 01/01/2025.
</remarks>
        <noticeSignature>
            <noticeDate>01/07/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>02/28/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Michael Waterman</signature>
        </noticeSignature>
    </formData>
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144
0001851495
XXXXXXXX
LIVE
0001637873
ACV AUCTIONS, INC.
001-40256
640 Ellicott St., Suite 321
Buffalo
NY
14203
8005534070
MICHAEL WATERMAN
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
45162
953369.82
158276243
01/07/2025
NASDAQ
Common
01/07/2025
Exercise of Stock Options
Issuer
N
30000
01/07/2025
Cash
Common
01/01/2024
Restricted Stock Units
Issuer
N
15162
01/01/2024
N/A
N
10b5-1 Sales Plan for MICHAEL WATERMAN
640 Ellicott St., Suite 321
Buffalo
NY
14203
Common
12/10/2024
15000
327091.50
10b5-1 Sales Plan for MICHAEL WATERMAN
640 Ellicott St., Suite 321
Buffalo
NY
14203
Common
11/12/2024
21483
449268.36
10b5-1 Sales Plan for MICHAEL WATERMAN
640 Ellicott St., Suite 321
Buffalo
NY
14203
Common
10/15/2024
18001
338278.39
The 30,000 securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
The 15,162 securities to be sold were acquired upon the vesting of restricted stock units on 01/01/2024 and 01/01/2025.
01/07/2025
02/28/2024
/s/ Michael Waterman