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    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0001084380</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


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        <classId>C000162585</classId>
        <classId>C000079543</classId>
        <classId>C000079542</classId>
        <classId>C000079544</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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      <regFileNumber>811-09301</regFileNumber>
      <regCik>0001084380</regCik>
      <regLei>549300L8R42TEBN5NG46</regLei>
      <regStreet1>730 Third Avenue</regStreet1>
      <regCity>New York</regCity>
      <regStateConditional regCountry="US" regState="US-NY"/>
      <regZipOrPostalCode>10017</regZipOrPostalCode>
      <regPhone>800-842-2733</regPhone>
      <seriesName>Nuveen Lifecycle Index 2040 Fund</seriesName>
      <seriesId>S000026506</seriesId>
      <seriesLei>5493000C4V0Y1KS6M191</seriesLei>
      <repPdEnd>2026-05-31</repPdEnd>
      <repPdDate>2026-05-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>1543835.00</totLiabs>
      <netAssets>11671210274.00</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
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      <standByCommit>0.00000000</standByCommit>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <name>STATE STREET BANK AND TRUST COMPANY</name>
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        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <clearedCentCparty centralCounterparty="Fixed Income Clearing Corporation" isCleared="Y"/>
          <isTriParty>N</isTriParty>
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          <maturityDt>2026-06-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
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      <invstOrSec>
        <name>Nuveen Emerging Markets Equity Index Fund</name>
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      <invstOrSec>
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      <invstOrSec>
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      </invstOrSec>
      <invstOrSec>
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      </invstOrSec>
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        <name>Nuveen Equity Index Fund</name>
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      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2026-05-31</ncom:dateSigned>
      <ncom:nameOfApplicant>TIAA-CREF Funds</ncom:nameOfApplicant>
      <ncom:signature>Gina Spunder</ncom:signature>
      <ncom:signerName>Gina Spunder</ncom:signerName>
      <ncom:title>Director, Fund Financial Reporting</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
