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      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0002066313</cik>
          <ccc>XXXXXXXX</ccc>
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      </filer>
      <investmentCompanyType>N-2</investmentCompanyType>
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    <generalInfo reportEndingPeriod="2026-03-31" isReportPeriodLt12="Y"/>
    <registrantInfo>
      <registrantFullName>599 Fund LLC</registrantFullName>
      <investmentCompFileNo>811-24135</investmentCompFileNo>
      <registrantCik>0002066313</registrantCik>
      <registrantLei>529900U859MWHL4JFD91</registrantLei>
      <registrantstreet1>599 Lexington Avenue</registrantstreet1>
      <registrantstreet2>37th Floor</registrantstreet2>
      <registrantcity>New York</registrantcity>
      <registrantzipCode>10022</registrantzipCode>
      <registrantstate>US-NY</registrantstate>
      <registrantcountry>US</registrantcountry>
      <registrantphoneNumber>833-709-4984</registrantphoneNumber>
      <websites>
        <website webpage="N/A"/>
      </websites>
      <locationBooksRecords>
        <locationBooksRecord>
          <officeName>Aksia LLC</officeName>
          <officeAddress1>599 Lexington Avenue</officeAddress1>
          <officeAddress2>37th Floor</officeAddress2>
          <officeCity>New York</officeCity>
          <officeStateCountry officeCountry="US" officeState="US-NY"/>
          <officeRecordsZipCode>10022</officeRecordsZipCode>
          <officePhone>212-710-5710</officePhone>
          <booksRecordsDesc>Records relating to its function as advisor</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>The Bank of New York Mellon</officeName>
          <officeAddress1>301 Bellevue Parkway</officeAddress1>
          <officeCity>Wilmington</officeCity>
          <officeStateCountry officeCountry="US" officeState="US-DE"/>
          <officeRecordsZipCode>19809</officeRecordsZipCode>
          <officePhone>302-791-3600</officePhone>
          <booksRecordsDesc>Records relating to its function as Custodian</booksRecordsDesc>
        </locationBooksRecord>
        <locationBooksRecord>
          <officeName>Ultimus Fund Solutions, LLC</officeName>
          <officeAddress1>225 Pictoria Drive</officeAddress1>
          <officeCity>Cincinnati</officeCity>
          <officeStateCountry officeCountry="US" officeState="US-OH"/>
          <officeRecordsZipCode>45246</officeRecordsZipCode>
          <officePhone>513-587-3400</officePhone>
          <booksRecordsDesc>Records relating to its function as administrator, fund accountant and transfer agent</booksRecordsDesc>
        </locationBooksRecord>
      </locationBooksRecords>
      <isRegistrantFirstFiling>Y</isRegistrantFirstFiling>
      <isRegistrantLastFiling>N</isRegistrantLastFiling>
      <isRegistrantFamilyInvComp>N</isRegistrantFamilyInvComp>
      <registrantClassificationType>N-2</registrantClassificationType>
      <isSecuritiesActRegistration>N</isSecuritiesActRegistration>
      <directors>
        <director>
          <directorName>Carrie Schoffman</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
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            <fileNumberInfo fileNumber="811-21462"/>
            <fileNumberInfo fileNumber="811-23248"/>
            <fileNumberInfo fileNumber="811-23921"/>
            <fileNumberInfo fileNumber="811-23962"/>
            <fileNumberInfo fileNumber="811-23966"/>
            <fileNumberInfo fileNumber="811-23997"/>
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            <fileNumberInfo fileNumber="811-24020"/>
            <fileNumberInfo fileNumber="811-24101"/>
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        </director>
        <director>
          <directorName>Clifford Schireson</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-22680"/>
            <fileNumberInfo fileNumber="811-23921"/>
            <fileNumberInfo fileNumber="811-23962"/>
            <fileNumberInfo fileNumber="811-23966"/>
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            <fileNumberInfo fileNumber="811-24020"/>
            <fileNumberInfo fileNumber="811-24101"/>
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        </director>
        <director>
          <directorName>Mary Zeven</directorName>
          <crdNumber>N/A</crdNumber>
          <isDirectorInterestedPerson>N</isDirectorInterestedPerson>
          <fileNumbers>
            <fileNumberInfo fileNumber="811-09082"/>
            <fileNumberInfo fileNumber="811-23659"/>
            <fileNumberInfo fileNumber="811-23921"/>
            <fileNumberInfo fileNumber="811-23962"/>
            <fileNumberInfo fileNumber="811-23966"/>
            <fileNumberInfo fileNumber="811-24001"/>
            <fileNumberInfo fileNumber="811-24020"/>
            <fileNumberInfo fileNumber="811-24101"/>
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        </director>
      </directors>
      <chiefComplianceOfficers>
        <chiefComplianceOfficer>
          <ccoName>Chad Bitterman</ccoName>
          <crdNumber>002979477</crdNumber>
          <ccoStreet1>4221 North 203rd Street</ccoStreet1>
          <ccoStreet2>Suite 100</ccoStreet2>
          <ccoCity>Elkhorn</ccoCity>
          <ccoStateCountry ccoCountry="US" ccoState="US-NE"/>
          <ccoZipCode>68022</ccoZipCode>
          <ccoPhone>XXXXXX</ccoPhone>
          <isCcoChangedSinceLastFiling>N</isCcoChangedSinceLastFiling>
          <ccoEmployers>
            <ccoEmployer ccoEmployerName="N/A" ccoEmployerId="N/A"/>
          </ccoEmployers>
        </chiefComplianceOfficer>
      </chiefComplianceOfficers>
      <isRegistrantSubmittedMatter>N</isRegistrantSubmittedMatter>
      <isPreviousLegalProceeding>N</isPreviousLegalProceeding>
      <isPreviousProceedingTerminated>N</isPreviousProceedingTerminated>
      <isClaimFiled>N</isClaimFiled>
      <coveredByInsurancePolicy isCoveredByInsurancePolicy="Y" isClaimFiledDuringPeriod="N"/>
      <isFinancialSupportDuringPeriod>N</isFinancialSupportDuringPeriod>
      <releaseNumbers isExemptionFromAct="Y">
        <releaseNumberInfo releaseNumber="IC-35765"/>
      </releaseNumbers>
      <isUnderwriterHiredOrTerminated>N</isUnderwriterHiredOrTerminated>
      <publicAccountants>
        <publicAccountant>
          <publicAccountantName>KPMG LLP</publicAccountantName>
          <pcaobNumber>185</pcaobNumber>
          <publicAccountantLei>5493003PVCIGA21K0K42</publicAccountantLei>
          <publicAccountantRssdId>N/A</publicAccountantRssdId>
          <publicAccountantStateCountry publicAccountantCountry="US" publicAccountantState="US-NY"/>
        </publicAccountant>
      </publicAccountants>
      <isPublicAccountantChanged>N</isPublicAccountantChanged>
      <isMaterialWeakness>Y</isMaterialWeakness>
      <isOpinionOffered>N</isOpinionOffered>
      <isMaterialChange>N</isMaterialChange>
      <isAccountingPrincipleChange>N</isAccountingPrincipleChange>
      <isPaymentErrorInNetAssetValue>N</isPaymentErrorInNetAssetValue>
      <isPaymentDividend>N</isPaymentDividend>
    </registrantInfo>
    <managementInvestmentQuestionSeriesInfo>
      <managementInvestmentQuestion>
        <mgmtInvFundName>599 Fund LLC</mgmtInvFundName>
        <mgmtInvLei>529900U859MWHL4JFD91</mgmtInvLei>
        <isFirstFilingByFund>Y</isFirstFilingByFund>
        <fundType>N/A</fundType>
        <isNonDiversifiedCompany>Y</isNonDiversifiedCompany>
        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>Y</isFundSecuritiesLending>
        <didFundLendSecurities>N</didFundLendSecurities>
        <paymentToAgentManagerType>N/A</paymentToAgentManagerType>
        <avgPortfolioSecuritiesValue>N/A</avgPortfolioSecuritiesValue>
        <netIncomeSecuritiesLending>N/A</netIncomeSecuritiesLending>
        <relyOnRuleTypes>
          <relyOnRuleType>Rule 12d1-1 (17 CFR 270.12d1-1)</relyOnRuleType>
          <relyOnRuleType>Rule 32a-4 (17 CFR 270.32a-4)</relyOnRuleType>
        </relyOnRuleTypes>
        <isExpenseLimitationInPlace>N</isExpenseLimitationInPlace>
        <isExpenseReducedOrWaived>N</isExpenseReducedOrWaived>
        <isFeesWaivedRecoupable>N</isFeesWaivedRecoupable>
        <isExpenseWaivedRecoupable>N</isExpenseWaivedRecoupable>
        <investmentAdvisers>
          <investmentAdviser>
            <investmentAdviserName>Aksia LLC</investmentAdviserName>
            <investmentAdviserFileNo>801-67661</investmentAdviserFileNo>
            <investmentAdviserCrdNo>000143422</investmentAdviserCrdNo>
            <investmentAdviserLei>254900C4HFOS6G66LO17</investmentAdviserLei>
            <investmentAdviserRssdId>N/A</investmentAdviserRssdId>
            <investmentAdviserStateCountry investmentAdviserState="US-NY" investmentAdviserCountry="US"/>
            <isInvestmentAdviserHired>N</isInvestmentAdviserHired>
          </investmentAdviser>
        </investmentAdvisers>
        <transferAgents>
          <transferAgent>
            <transferAgentName>Ultimus Fund Solutions, LLC</transferAgentName>
            <transferAgentFileNo>84-05829</transferAgentFileNo>
            <transferAgentLei>N/A</transferAgentLei>
            <transferAgentRssdId>N/A</transferAgentRssdId>
            <transferAgentStateCountry transferAgentState="US-OH" transferAgentCountry="US"/>
            <isTransferAgentAffiliated>N</isTransferAgentAffiliated>
            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
          </transferAgent>
        </transferAgents>
        <isTransferAgentHiredOrTerminated>N</isTransferAgentHiredOrTerminated>
        <pricingServices>
          <pricingService>
            <pricingServiceName>Aksia LLC</pricingServiceName>
            <pricingServiceOther>801-67661</pricingServiceOther>
            <pricingServiceIdNumberDesc>SEC number</pricingServiceIdNumberDesc>
            <pricingServiceStateCountry pricingServiceState="US-NY" pricingServiceCountry="US"/>
            <isPricingServiceAffiliated>Y</isPricingServiceAffiliated>
          </pricingService>
        </pricingServices>
        <isPricingServiceHiredOrTerminated>N</isPricingServiceHiredOrTerminated>
        <custodians>
          <custodian>
            <custodianName>The Bank of New York Mellon</custodianName>
            <custodianLei>HPFHU0OQ28E4N0NFVK49</custodianLei>
            <custodianRssdId>N/A</custodianRssdId>
            <custodianStateCountry custodianState="US-DE" custodianCountry="US"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>N</isSubCustodian>
            <custodyType>Securities depository - rule 17f-4 (17 CFR 270.17f-4)</custodyType>
          </custodian>
        </custodians>
        <isCustodianHiredOrTerminated>N</isCustodianHiredOrTerminated>
        <isShareholderServiceHiredTerminated>N</isShareholderServiceHiredTerminated>
        <admins>
          <admin>
            <adminName>Ultimus Fund Solutions, LLC</adminName>
            <adminLei>N/A</adminLei>
            <adminRssdId>N/A</adminRssdId>
            <adminOther>84-05829</adminOther>
            <idNumberDesc>Filing Number</idNumberDesc>
            <adminStateCountry adminState="US-OH" adminCountry="US"/>
            <isAdminAffiliated>N</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
          </admin>
        </admins>
        <isAdminHiredOrTerminated>N</isAdminHiredOrTerminated>
        <aggregateCommission>0</aggregateCommission>
        <principalAggregatePurchase>0</principalAggregatePurchase>
        <isBrokerageResearchPayment>N</isBrokerageResearchPayment>
        <mnthlyAvgNetAssets>85829810.40</mnthlyAvgNetAssets>
      </managementInvestmentQuestion>
    </managementInvestmentQuestionSeriesInfo>
    <closedEndManagementInvestment>
      <securityRelatedItems>
        <securityRelatedItem>
          <description>Other</description>
          <securityClassTitle>N/A</securityClassTitle>
          <commonStocks>
            <commonStock commonStockExchange="N/A" commonStockTickerSymbol="N/A"/>
          </commonStocks>
          <otherSecurityDescription>Units</otherSecurityDescription>
        </securityRelatedItem>
      </securityRelatedItems>
      <isRightsOffering>N</isRightsOffering>
      <isSecondaryOffering>N</isSecondaryOffering>
      <isRepurchaseSecurity>N</isRepurchaseSecurity>
      <isDefaultLongTermDebt>N</isDefaultLongTermDebt>
      <isDividendsInArrears>N</isDividendsInArrears>
      <isSecuritiesModified>N</isSecuritiesModified>
      <managementFee>0.50</managementFee>
      <netOperatingExpenses>4.57</netOperatingExpenses>
      <netAssetValuePerShare>25.65</netAssetValuePerShare>
    </closedEndManagementInvestment>
    <attachmentsTab>
      <isIPAReportInternalControl>true</isIPAReportInternalControl>
    </attachmentsTab>
    <signature registrantSignedName="599 Fund LLC" signedDate="2026-06-12" signature="Jessica Chase" title="Treasurer"/>
  </formData>
</edgarSubmission>
