<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>
      
      <filer>
        <issuerCredentials>
          <cik>0000836487</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>
      
      
      <seriesClassInfo>
        <seriesId>S000063049</seriesId>
        <classId>C000204517</classId>
        <classId>C000204518</classId>
        <classId>C000204519</classId>
        <classId>C000204520</classId>
      </seriesClassInfo>
      
      
    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>MORGAN STANLEY INSTITUTIONAL FUND INC</regName>
      <regFileNumber>811-05624</regFileNumber>
      <regCik>0000836487</regCik>
      <regLei>54930067DYRSUSGS4E97</regLei>
      <regStreet1>1585 Broadway</regStreet1>
      <regCity>NEW YORK</regCity>
      <regStateConditional regCountry="US" regState="US-NY"/>
      <regZipOrPostalCode>10036</regZipOrPostalCode>
      <regPhone>800-869-6397</regPhone>
      <seriesName>Global Endurance Portfolio</seriesName>
      <seriesId>S000063049</seriesId>
      <seriesLei>549300V8NT11PW954O87</seriesLei>
      <repPdEnd>2026-12-31</repPdEnd>
      <repPdDate>2026-06-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>16637597.95</totAssets>
      <totLiabs>387693.02</totLiabs>
      <netAssets>16249904.93</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>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>1371.22000000</cshNotRptdInCorD>
      <borrowers>
        <borrower aggrVal="351231.00000000" lei="549300HN4UKV1E2R3U73" name="BofA Securities, Inc."/>
        <borrower aggrVal="200802.43000000" lei="58PU97L1C0WSRCWADL48" name="Jefferies LLC"/>
      </borrowers>
      <aggregateCondition isNonCashCollateral="Y">
        <aggregateInfos>
          <aggregateInfo amt="212670.33000000" collatrl="211219.30000000">
            <invstCat>UST</invstCat>
          </aggregateInfo>
        </aggregateInfos>
      </aggregateCondition>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000204517" rtn1="3.53000000" rtn2="1.37000000" rtn3="11.30000000"/>
          <monthlyTotReturn classId="C000204518" rtn1="3.54000000" rtn2="1.34000000" rtn3="11.30000000"/>
          <monthlyTotReturn classId="C000204519" rtn1="3.44000000" rtn2="1.30000000" rtn3="11.20000000"/>
          <monthlyTotReturn classId="C000204520" rtn1="3.59000000" rtn2="1.32000000" rtn3="11.33000000"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <equityContracts>
            <mon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <mon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            <forwardCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </forwardCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </equityContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="335534.98000000" netUnrealizedAppr="229382.59000000"/>
        <othMon2 netRealizedGain="-189542.44000000" netUnrealizedAppr="396090.33000000"/>
        <othMon3 netRealizedGain="50431.69000000" netUnrealizedAppr="1651255.66000000"/>
      </returnInfo>
      <mon1Flow redemption="815274.24000000" reinvestment="0.00000000" sales="164990.25000000"/>
      <mon2Flow redemption="300737.13000000" reinvestment="0.00000000" sales="33423.30000000"/>
      <mon3Flow redemption="943749.98000000" reinvestment="0.00000000" sales="152138.26000000"/>
      
      
    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Diageo PLC</name>
        <lei>213800ZVIELEA55JMJ32</lei>
        <title>Diageo PLC</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="GB0002374006"/>
        </identifiers>
        <balance>18036.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="GBP" exchangeRt="0.75389200"/>
        <valUSD>363246.59000000</valUSD>
        <pctVal>2.235376708754</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>GB</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Arbutus Biopharma Corp</name>
        <lei>25490064CESONAUIAS23</lei>
        <title>Arbutus Biopharma Corp</title>
        <cusip>03879J100</cusip>
        <identifiers>
          <isin value="CA03879J1003"/>
        </identifiers>
        <balance>186127.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>893409.60000000</valUSD>
        <pctVal>5.497937396240</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>CA</invCountry>
        
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iPath Series B S&amp;P 500 VIX Short-Term Futures ETN</name>
        <lei>N/A</lei>
        <title>iPath Series B S&amp;P 500 VIX Short-Term Futures ETN</title>
        <cusip>06748M196</cusip>
        <identifiers>
          <isin value="US06748M1962"/>
        </identifiers>
        <balance>15972.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>352821.48000000</valUSD>
        <pctVal>2.171221810342</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="351231.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Bright Horizons Family Solutions Inc</name>
        <lei>2549009BKSVTM7UEYT38</lei>
        <title>Bright Horizons Family Solutions Inc</title>
        <cusip>109194100</cusip>
        <identifiers>
          <isin value="US1091941005"/>
        </identifiers>
        <balance>5664.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>401464.32000000</valUSD>
        <pctVal>2.470564115478</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Calumet Inc</name>
        <lei>529900E014J6I18H3V27</lei>
        <title>Calumet Inc</title>
        <cusip>131428104</cusip>
        <identifiers>
          <isin value="US1314281049"/>
        </identifiers>
        <balance>16354.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>589071.08000000</valUSD>
        <pctVal>3.625074008356</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Corpay Inc</name>
        <lei>549300DG6RR0NQSFLN74</lei>
        <title>Corpay Inc</title>
        <cusip>219948106</cusip>
        <identifiers>
          <isin value="US2199481068"/>
        </identifiers>
        <balance>1274.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>424585.98000000</valUSD>
        <pctVal>2.612852086390</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>DraftKings Inc</name>
        <lei>2549006G33IUL6IVOD83</lei>
        <title>DraftKings Inc</title>
        <cusip>26142V105</cusip>
        <identifiers>
          <isin value="US26142V1052"/>
        </identifiers>
        <balance>23775.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>600556.50000000</valUSD>
        <pctVal>3.695753929558</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Floor &amp; Decor Holdings Inc</name>
        <lei>549300M5FR3N688XGQ36</lei>
        <title>Floor &amp; Decor Holdings Inc</title>
        <cusip>339750101</cusip>
        <identifiers>
          <isin value="US3397501012"/>
        </identifiers>
        <balance>13214.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>784383.04000000</valUSD>
        <pctVal>4.827000794028</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>USA TODAY Co Inc</name>
        <lei>549300JQ2PU0RI3ZBA32</lei>
        <title>USA TODAY Co Inc</title>
        <cusip>36472T109</cusip>
        <identifiers>
          <isin value="US36472T1097"/>
        </identifiers>
        <balance>49728.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>425174.40000000</valUSD>
        <pctVal>2.616473153729</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>LVMH Moet Hennessy Louis Vuitton SE</name>
        <lei>IOG4E947OATN0KJYSD45</lei>
        <title>LVMH Moet Hennessy Louis Vuitton SE</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="FR0000121014"/>
        </identifiers>
        <balance>282.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="EUR" exchangeRt="0.87519700"/>
        <valUSD>155962.97000000</valUSD>
        <pctVal>0.959777738219</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>FR</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Immunovant Inc</name>
        <lei>N/A</lei>
        <title>Immunovant Inc</title>
        <cusip>45258J102</cusip>
        <identifiers>
          <isin value="US45258J1025"/>
        </identifiers>
        <balance>20479.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>789055.87000000</valUSD>
        <pctVal>4.855756839187</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Remy Cointreau SA</name>
        <lei>5493004V6A3Z027YT216</lei>
        <title>Remy Cointreau SA</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="FR0000130395"/>
        </identifiers>
        <balance>4175.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="EUR" exchangeRt="0.87519700"/>
        <valUSD>205323.14000000</valUSD>
        <pctVal>1.263534407644</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>FR</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="200802.43000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Molson Coors Beverage Co</name>
        <lei>54930073LBBH6ZCBE225</lei>
        <title>Molson Coors Beverage Co</title>
        <cusip>60871R209</cusip>
        <identifiers>
          <isin value="US60871R2094"/>
        </identifiers>
        <balance>4898.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>190826.08000000</valUSD>
        <pctVal>1.174321208782</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Nektar Therapeutics</name>
        <lei>5299005I24806IOIYE03</lei>
        <title>Nektar Therapeutics</title>
        <cusip>640268306</cusip>
        <identifiers>
          <isin value="US6402683063"/>
        </identifiers>
        <balance>5616.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>392052.96000000</valUSD>
        <pctVal>2.412647715102</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Odyssey Marine Exploration Inc</name>
        <lei>549300KNVIY6EZIJ2221</lei>
        <title>Odyssey Marine Exploration Inc</title>
        <cusip>676118201</cusip>
        <identifiers>
          <isin value="US6761182012"/>
        </identifiers>
        <balance>479733.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>407964.94000000</valUSD>
        <pctVal>2.510568164905</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>QXO Inc</name>
        <lei>549300HDXQWWCBOYXP31</lei>
        <title>QXO Inc</title>
        <cusip>82846H405</cusip>
        <identifiers>
          <isin value="US82846H4056"/>
        </identifiers>
        <balance>45472.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>785756.16000000</valUSD>
        <pctVal>4.835450812695</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Sotera Health Co</name>
        <lei>N/A</lei>
        <title>Sotera Health Co</title>
        <cusip>83601L102</cusip>
        <identifiers>
          <isin value="US83601L1026"/>
        </identifiers>
        <balance>26212.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>465263.00000000</valUSD>
        <pctVal>2.863173673964</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Space Exploration Technologies Corp</name>
        <lei>549300B9WLO96RQCXP87</lei>
        <title>Space Exploration Technologies Corp</title>
        <cusip>84615Q103</cusip>
        <identifiers>
          <isin value="US84615Q1031"/>
        </identifiers>
        <balance>3345.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>571526.70000000</valUSD>
        <pctVal>3.517107961320</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>TD SYNNEX Corp</name>
        <lei>5493004HI6PFLF46NS53</lei>
        <title>TD SYNNEX Corp</title>
        <cusip>87162W100</cusip>
        <identifiers>
          <isin value="US87162W1009"/>
        </identifiers>
        <balance>1563.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>417852.42000000</valUSD>
        <pctVal>2.571414551654</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Teleflex Inc</name>
        <lei>UUL85LWXB4NGSWWXIQ25</lei>
        <title>Teleflex Inc</title>
        <cusip>879369106</cusip>
        <identifiers>
          <isin value="US8793691069"/>
        </identifiers>
        <balance>5272.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>668278.72000000</valUSD>
        <pctVal>4.112508490841</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Somnigroup International Inc</name>
        <lei>549300HFEKVR3US71V91</lei>
        <title>Somnigroup International Inc</title>
        <cusip>88023U101</cusip>
        <identifiers>
          <isin value="US88023U1016"/>
        </identifiers>
        <balance>4200.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>329280.00000000</valUSD>
        <pctVal>2.026350316623</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Urban Outfitters Inc</name>
        <lei>549300N3DUFR5U6NRN38</lei>
        <title>Urban Outfitters Inc</title>
        <cusip>917047102</cusip>
        <identifiers>
          <isin value="US9170471026"/>
        </identifiers>
        <balance>7086.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>502113.96000000</valUSD>
        <pctVal>3.089950139172</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Morgan Stanley &amp; Co. LLC</name>
        <lei>549300OJY9IZ31SGS926</lei>
        <title>Morgan Stanley Institutional Liquidity Funds - Treasury Securities Portfolio</title>
        <cusip>61747C525</cusip>
        <identifiers>
          <isin value="US61747C5250"/>
        </identifiers>
        <balance>320379.99000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>320379.99310000</valUSD>
        <pctVal>1.971580722964</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="320379.99000000" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Morgan Stanley &amp; Co. LLC</name>
        <lei>549300OJY9IZ31SGS926</lei>
        <title>Morgan Stanley Institutional Liquidity Funds - Treasury Securities Portfolio</title>
        <cusip>61747C525</cusip>
        <identifiers>
          <isin value="US61747C5250"/>
        </identifiers>
        <balance>202045.66000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>202045.66000000</valUSD>
        <pctVal>1.243365181952</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</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>
      <invstOrSec>
        <name>Citigroup Global Markets Inc</name>
        <lei>MBNUM2BPBDO7JBLYG310</lei>
        <title>Citigroup Global Markets Inc</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="985SRR000_X_SLCOLLCASH"/>
        </identifiers>
        <balance>18763.12392522</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>18763.12392522</valUSD>
        <pctVal>0.115466053531</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <notClearedCentCparty isCleared="N">
            <counterpartyInfos>
              <counterpartyInfo lei="MBNUM2BPBDO7JBLYG310" name="Citigroup Global Markets Inc"/>
            </counterpartyInfos>
          </notClearedCentCparty>
          <isTriParty>Y</isTriParty>
          <repurchaseRt>3.50000000</repurchaseRt>
          <maturityDt>2026-07-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>18967.88852900</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>19138.61600939</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="18763.12392522" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>HSBC Securities (USA) Inc.</name>
        <lei>CYYGQCGNHMHPSMRL3R97</lei>
        <title>HSBC TRI PARTY   A REPO</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="99VDMN006-1_X_SLCOLLCA"/>
        </identifiers>
        <balance>23215.94150609</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>23215.94150609</valUSD>
        <pctVal>0.142868168189</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <notClearedCentCparty isCleared="N">
            <counterpartyInfos>
              <counterpartyInfo lei="CYYGQCGNHMHPSMRL3R97" name="HSBC Securities (USA) Inc."/>
            </counterpartyInfos>
          </notClearedCentCparty>
          <isTriParty>Y</isTriParty>
          <repurchaseRt>3.64000000</repurchaseRt>
          <maturityDt>2026-07-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>27792.73221500</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>23680.35278209</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="23215.94150609" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated</name>
        <lei>8NAV47T0Y26Q87Y0QP81</lei>
        <title>MERRILL LYNCH TRI PARTY A REPO</title>
        <cusip>000000000</cusip>
        <identifiers>
          <other otherDesc="Internal Identifier" value="99VDMN006_X_SLCOLLCA"/>
        </identifiers>
        <balance>23215.94150609</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>23215.94150609</valUSD>
        <pctVal>0.142868168189</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <notClearedCentCparty isCleared="N">
            <counterpartyInfos>
              <counterpartyInfo lei="8NAV47T0Y26Q87Y0QP81" name="Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated"/>
            </counterpartyInfos>
          </notClearedCentCparty>
          <isTriParty>Y</isTriParty>
          <repurchaseRt>3.64000000</repurchaseRt>
          <maturityDt>2026-07-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>22423.37168600</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>23680.28508440</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="23215.94150609" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Victoria PLC</name>
        <lei>2138002K6ECECHVCQN25</lei>
        <title>Victoria PLC</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="GB00BZC0LC10"/>
        </identifiers>
        <balance>3647784.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="GBP" exchangeRt="0.75389200"/>
        <valUSD>3095007.49000000</valUSD>
        <pctVal>19.04631136817</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>GB</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Flutter Entertainment PLC</name>
        <lei>635400EG4YIJLJMZJ782</lei>
        <title>Flutter Entertainment PLC</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="IE00BWT6H894"/>
        </identifiers>
        <balance>3833.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>391617.61000000</valUSD>
        <pctVal>2.409968622505</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>IE</invCountry>
        
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Roivant Sciences Ltd</name>
        <lei>549300DL466NY5J6U724</lei>
        <title>Roivant Sciences Ltd</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="BMG762791017"/>
        </identifiers>
        <balance>33336.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1179761.04000000</valUSD>
        <pctVal>7.260110413458</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>BM</invCountry>
        
        <isRestrictedSec>N</isRestrictedSec>
        
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Royalty Pharma PLC</name>
        <lei>549300FGFN7VOK8BZR03</lei>
        <title>Royalty Pharma PLC</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="GB00BMVP7Y09"/>
        </identifiers>
        <balance>11077.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>621087.39000000</valUSD>
        <pctVal>3.822098607194</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>GB</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>2026-07-20</ncom:dateSigned>
      <ncom:nameOfApplicant>MORGAN STANLEY INSTITUTIONAL FUND INC</ncom:nameOfApplicant>
      <ncom:signature>James F. Kirchner</ncom:signature>
      <ncom:signerName>James F. Kirchner</ncom:signerName>
      <ncom:title>Principal Financial Officer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
