<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
<headerData>
<submissionType>SCHEDULE 13G</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0000312069</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>
</filerInfo>
</headerData>
<formData>
<coverPageHeader>
<securitiesClassTitle>COMMON-STOCK</securitiesClassTitle>
<eventDateRequiresFilingThisStatement>09/30/2025</eventDateRequiresFilingThisStatement>
<issuerInfo>
<issuerCik>0001872228</issuerCik>
<issuerName>THAYER VENTURES ACQUIS CL A</issuerName>
<issuerCusip>G87890102</issuerCusip>
<issuerPrincipalExecutiveOfficeAddress>
<com:street1>25852 McBean Parkway Suite 508</com:street1>
<com:city>Valencia</com:city>
<com:stateOrCountry>CA</com:stateOrCountry>
<com:zipCode>91355</com:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
</coverPageHeader>
<coverPageHeaderReportingPersonDetails>
<reportingPersonName>Barclays PLC</reportingPersonName>
<citizenshipOrOrganization>X0</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>1519375</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>1519375</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>1519375</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<classPercent>7.41</classPercent>
<typeOfReportingPerson>HC</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<items>
<item1>
<issuerName>THAYER VENTURES ACQUIS CL A</issuerName>
<issuerPrincipalExecutiveOfficeAddress>25852 McBean Parkway Suite 508, CA, 91355</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>Barclays PLC</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>1 Churchill Place, London - E14 5HP</principalBusinessOfficeOrResidenceAddress>
<citizenship>X0</citizenship>
</item2>
<item3>
<notApplicableFlag>N</notApplicableFlag>
<typeOfPersonFiling>HC</typeOfPersonFiling>
</item3>
<item4>
<amountBeneficiallyOwned>1519375</amountBeneficiallyOwned>
<classPercent>7.41</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>1519375</solePowerOrDirectToVote>
<sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
<solePowerOrDirectToDispose>1519375</solePowerOrDirectToDispose>
<sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
</numberOfSharesPersonHas>
</item4>
<item5>
<notApplicableFlag>Y</notApplicableFlag>
<classOwnership5PercentOrLess>N</classOwnership5PercentOrLess>
</item5>
<item6>
<notApplicableFlag>Y</notApplicableFlag>
</item6>
<item7>
<notApplicableFlag>N</notApplicableFlag>
<subsidiaryIdentificationAndClassification>Barclays Bank PLC</subsidiaryIdentificationAndClassification>
</item7>
<item8>
<notApplicableFlag>Y</notApplicableFlag>
</item8>
<item9>
<notApplicableFlag>Y</notApplicableFlag>
</item9>
<item10>
<notApplicableFlag>N</notApplicableFlag>
<certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11</certifications>
</item10>
</items>
<signatureInformation>
<reportingPersonName>Barclays PLC</reportingPersonName>
<signatureDetails>
<signature>Ramya Rao</signature>
<title>Director</title>
<date>11/12/2025</date>
</signatureDetails>
</signatureInformation>
</formData>
</edgarSubmission>
