<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0002029706</cik>
        <entityName>Lightyear Fund VI-A, L.P.</entityName>
        <issuerAddress>
            <street1>40 WEST 57TH STREET, 22ND FLOOR</street1>
            <city>NEW YORK</city>
            <stateOrCountry>NY</stateOrCountry>
            <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
            <zipCode>10019</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(212) 328-0555</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2023</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>n/a</firstName>
                <lastName>Lightyear Fund VI GP, L.P.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner of the Issuer (the &quot;Issuer GP&quot;)</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Vassallo</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lori</firstName>
                <lastName>Forlano</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Daniel</firstName>
                <lastName>Stencel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>n/a</firstName>
                <lastName>Lightyear Fund VI GP Holdings, LLC</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner of the Issuer GP (the &quot;GP of the Issuer GP&quot;)</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>n/a</firstName>
                <lastName>LY Holdings, LLC</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>40 West 57th Street, 22nd Floor</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Managing Member of the GP of the Issuer GP</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0000950103-24-010181</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2024-07-19</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Limited Partnership Interests</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>None</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>Atlantic-Pacific Capital, Inc.</associatedBDName>
                <associatedBDCRDNumber>000038356</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>102 GREENWICH AVENUE, 2ND FLOOR</street1>
                    <city>GREENWICH</city>
                    <stateOrCountry>CT</stateOrCountry>
                    <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                    <zipCode>06830</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
            <recipient>
                <recipientName>None</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>UBS Financial Services Inc.</associatedBDName>
                <associatedBDCRDNumber>000008174</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>1200 HARBOR BOULEVARD</street1>
                    <city>WEEHAWKEN</city>
                    <stateOrCountry>NJ</stateOrCountry>
                    <stateOrCountryDescription>NEW JERSEY</stateOrCountryDescription>
                    <zipCode>07086</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>1378867666</totalOfferingAmount>
            <totalAmountSold>1378867666</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse>Total raised by Issuer and its parallel fund (Lightyear Fund VI, L.P.), is $ 2,493,530,000 (inclusive of GP commitment).</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>58</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>13282972</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>The GP of the Issuer is entitled to carried interest. The Issuer will also pay management fees to its investment manager, Lightyear Capital VI, LLC. The carried interest and management fees are disclosed in the Issuer's confidential offering materials.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Lightyear Fund VI-A, L.P.</issuerName>
                <signatureName>/s/ Daniel Stencel</signatureName>
                <nameOfSigner>Daniel Stencel</nameOfSigner>
                <signatureTitle>Vice President of GP of the Issuer GP</signatureTitle>
                <signatureDate>2026-04-20</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
