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    <filerInfo>

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          <cik>0000861929</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


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        <classId>C000002770</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
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      <regFileNumber>811-06067</regFileNumber>
      <regCik>0000861929</regCik>
      <regLei>549300HU43AV2FC6L876</regLei>
      <regStreet1>6300 BEE CAVE ROAD</regStreet1>
      <regStreet2>BUILDING ONE</regStreet2>
      <regCity>AUSTIN</regCity>
      <regStateConditional regCountry="US" regState="US-TX"/>
      <regZipOrPostalCode>78746</regZipOrPostalCode>
      <regPhone>512-306-7400</regPhone>
      <seriesName>GLOBAL ALLOCATION 60/40 PORTFOLIO</seriesName>
      <seriesId>S000001017</seriesId>
      <seriesLei>549300HLXHMDBVF4DR20</seriesLei>
      <repPdEnd>2025-10-31</repPdEnd>
      <repPdDate>2025-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>202253.54</totLiabs>
      <netAssets>3474444615.42</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
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      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <monthlyTotReturns>
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      <invstOrSec>
        <name>DFA Global Core Plus Fixed Income Portfolio</name>
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        <fairValLevel>1</fairValLevel>
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        <name>DFA US Core Equity 2 Portfolio</name>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA International Real Estate Securities</name>
        <lei>549300CPCX0MJ9G37864</lei>
        <title>DFA International Real Estate Securities</title>
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        <fairValLevel>1</fairValLevel>
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        <name>DFA Real Estate Securities Portfolio</name>
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        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA World ex US Government Fixed Income Portfolio</name>
        <lei>5493001KSJU4MGHNS208</lei>
        <title>DFA World ex U.S. Government Fixed Income Portfolio</title>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      </invstOrSec>
      <invstOrSec>
        <name>International Core Equity 2 Portfolio</name>
        <lei>5493006PNAH8EX4MI695</lei>
        <title>International Core Equity 2 Portfolio</title>
        <cusip>233203371</cusip>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
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        <name>DFA US Core Equity 1 Portfolio</name>
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        <title>DFA U.S. Core Equity 1 Portfolio</title>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DFA Selectively Hedged Global Fixed Income Portfolio</name>
        <lei>5493007FXNXFTGEH1168</lei>
        <title>DFA Selectively Hedged Global Fixed Income Portfolio</title>
        <cusip>233203223</cusip>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA Inflation Protected Securities Portfolio</name>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>DFA Short-Term Extended Quality Portfolio</name>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>State Street Global Advisors</name>
        <lei>549300BZ5TGIFZUZDZ37</lei>
        <title>State Street Institutional US Government Money Market Fund</title>
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        <identifiers>
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        <balance>672467.65000000</balance>
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        <curCd>USD</curCd>
        <valUSD>672467.65000000</valUSD>
        <pctVal>0.019354680371</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      </invstOrSec>
      <invstOrSec>
        <name>Emerging Markets Core Equity 2 Portfolio</name>
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        <title>Emerging Markets Core Equity 2 Portfolio</title>
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        <balance>7093347.74000000</balance>
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        <curCd>USD</curCd>
        <valUSD>167686740.62000000</valUSD>
        <pctVal>4.826289067201</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-05-16</ncom:dateSigned>
      <ncom:nameOfApplicant>DIMENSIONAL INVESTMENT GROUP INC</ncom:nameOfApplicant>
      <ncom:signature>Randy Olson</ncom:signature>
      <ncom:signerName>Randy Olson</ncom:signerName>
      <ncom:title>Vice President</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
