content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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  <submissionType>144</submissionType>
  <filerInfo>
  <filer>
  <filerCredentials>
  <cik>0001044530</cik>
  <ccc>XXXXXXXX</ccc>
  </filerCredentials>
  </filer>
  <liveTestFlag>LIVE</liveTestFlag>
  </filerInfo>
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  <issuerInfo>
  <issuerCik>0001637873</issuerCik>
  <issuerName>ACV Auctions Inc.</issuerName>
  <secFileNumber>001-40256</secFileNumber>
  <issuerAddress>
  <street1 xmlns="http://www.sec.gov/edgar/common">640 ELLICOTT STREET #321</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Buffalo</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">NY</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">14203</zipCode>
  </issuerAddress>
  <issuerContactPhone>(800)- 553-4070</issuerContactPhone>
  <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Eileen A. Kamerick</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
  <relationshipsToIssuer>
  <relationshipToIssuer>Director</relationshipToIssuer>
  </relationshipsToIssuer>
  </issuerInfo>
  <securitiesInformation>
  <securitiesClassTitle>Common</securitiesClassTitle>
  <brokerOrMarketmakerDetails>
  <name>E*Trade Financial Corporate Services, Inc.</name>
  <address>
  <street1 xmlns="http://www.sec.gov/edgar/common">3 Edison Drive</street1>
  <city xmlns="http://www.sec.gov/edgar/common">Alpharetta</city>
  <stateOrCountry xmlns="http://www.sec.gov/edgar/common">GA</stateOrCountry>
  <zipCode xmlns="http://www.sec.gov/edgar/common">30005</zipCode>
  </address>
  </brokerOrMarketmakerDetails>
  <noOfUnitsSold>12498</noOfUnitsSold>
  <aggregateMarketValue>216715.32</aggregateMarketValue>
  <noOfUnitsOutstanding>105984</noOfUnitsOutstanding>
  <approxSaleDate>03/14/2024</approxSaleDate>
  <securitiesExchangeName>Nasdaq</securitiesExchangeName>
  </securitiesInformation>
  <securitiesToBeSold>
  <securitiesClassTitle>Common</securitiesClassTitle>
  <acquiredDate>03/14/2024</acquiredDate>
  <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
  <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
  <isGiftTransaction>N</isGiftTransaction>
  <amountOfSecuritiesAcquired>12498</amountOfSecuritiesAcquired>
  <paymentDate>03/14/2024</paymentDate>
  <natureOfPayment>Cash</natureOfPayment>
  </securitiesToBeSold>
  <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
  <noticeSignature>
  <noticeDate>03/14/2024</noticeDate>
  <signature>/s/ Eileen Kamerick</signature>
  </noticeSignature>
  </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 2665}]
text: 144
  0001044530
  XXXXXXXX
  LIVE
  0001637873
  ACV Auctions Inc.
  001-40256
  640 ELLICOTT STREET #321
  Buffalo
  NY
  14203
  (800)- 553-4070
  Eileen A. Kamerick
  Director
  Common
  E*Trade Financial Corporate Services, Inc.
  3 Edison Drive
  Alpharetta
  GA
  30005
  12498
  216715.32
  105984
  03/14/2024
  Nasdaq
  Common
  03/14/2024
  Exercise of Stock Options
  Issuer
  N
  12498
  03/14/2024
  Cash
  Y
  03/14/2024
  /s/ Eileen Kamerick