<?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>0000804239</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000013604</seriesId>
        <classId>C000147397</classId>
        <classId>C000036881</classId>
      </seriesClassInfo>


    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <regName>SEI INSTITUTIONAL MANAGED TRUST</regName>
      <regFileNumber>811-04878</regFileNumber>
      <regCik>0000804239</regCik>
      <regLei>9FTE3UO0Y1HGMNV0D371</regLei>
      <regStreet1>2 OLIVER STREET</regStreet1>
      <regCity>BOSTON</regCity>
      <regStateConditional regCountry="US" regState="US-MA"/>
      <regZipOrPostalCode>02109</regZipOrPostalCode>
      <regPhone>8003455734</regPhone>
      <seriesName>SIMT Real Return Fund</seriesName>
      <seriesId>S000013604</seriesId>
      <seriesLei>WBHL45U11OB3Z1HV2E14</seriesLei>
      <repPdEnd>2022-09-30</repPdEnd>
      <repPdDate>2022-09-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>258157406.55</totAssets>
      <totLiabs>119055.07</totLiabs>
      <netAssets>258038351.48</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>0.00000000</cshNotRptdInCorD>
      <curMetrics>
        <curMetric>
          <curCd>USD</curCd>
          <intrstRtRiskdv01 period10Yr="0.00000000" period1Yr="-30256.53961954" period30Yr="0.00000000" period3Mon="-29.40548764" period5Yr="-45281.28565053"/>
          <intrstRtRiskdv100 period10Yr="0.00000000" period1Yr="-3001983.00692215" period30Yr="0.00000000" period3Mon="-2931.07393456" period5Yr="-4458018.43892051"/>
        </curMetric>
      </curMetrics>
      <creditSprdRiskInvstGrade period10Yr="0.00000000" period1Yr="0.00000000" period30Yr="0.00000000" period3Mon="0.00000000" period5Yr="0.00000000"/>
      <creditSprdRiskNonInvstGrade period10Yr="0.00000000" period1Yr="0.00000000" period30Yr="0.00000000" period3Mon="0.00000000" period5Yr="0.00000000"/>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000147397" rtn1="-3.41365500" rtn2="-1.67818400" rtn3="1.92552900"/>
          <monthlyTotReturn classId="C000036881" rtn1="-3.52822600" rtn2="-1.68483600" rtn3="2.00766900"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <commodityContracts>
            <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </commodityContracts>
          <creditContracts>
            <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </creditContracts>
          <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </equityContracts>
          <foreignExchgContracts>
            <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </foreignExchgContracts>
          <interestRtContracts>
            <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </interestRtContracts>
          <otherContracts>
            <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>
            <futureCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </futureCategory>
            <optionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </optionCategory>
            <swaptionCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swaptionCategory>
            <swapCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </swapCategory>
            <warrantCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </warrantCategory>
            <otherCategory>
              <instrMon1 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
              <instrMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
            </otherCategory>
          </otherContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="-1316850.71000000" netUnrealizedAppr="-8109410.63000000"/>
        <othMon2 netRealizedGain="58578.77000000" netUnrealizedAppr="-8669134.05000000"/>
        <othMon3 netRealizedGain="-620489.24000000" netUnrealizedAppr="3630136.42000000"/>
      </returnInfo>
      <mon1Flow redemption="-19296653.86000000" reinvestment="0.00000000" sales="6335458.68000000"/>
      <mon2Flow redemption="-8442089.71000000" reinvestment="0.00000000" sales="5562246.61000000"/>
      <mon3Flow redemption="-4026226.84000000" reinvestment="5862032.34000000" sales="3067736.36000000"/>

    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 04/15/2026</title>
        <cusip>91282CCA7</cusip>
        <identifiers>
          <isin value="US91282CCA71"/>
        </identifiers>
        <balance>11207000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>11823669.88000000</valUSD>
        <pctVal>4.582136652239</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-04-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES .50%  04/15/24</title>
        <cusip>9128286N5</cusip>
        <identifiers>
          <isin value="US9128286N55"/>
        </identifiers>
        <balance>9697000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>11068898.37000000</valUSD>
        <pctVal>4.289633035753</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2024-04-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.50000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8%  01/15/2027</title>
        <cusip>912828V49</cusip>
        <identifiers>
          <isin value="US912828V491"/>
        </identifiers>
        <balance>12016000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>13766662.05000000</valUSD>
        <pctVal>5.335122461851</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2027-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.37500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>TSY INFL IX N/B 0.125000% 04/15/2025</title>
        <cusip>912828ZJ2</cusip>
        <identifiers>
          <isin value="US912828ZJ22"/>
        </identifiers>
        <balance>11752000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>12785912.67000000</valUSD>
        <pctVal>4.955043541653</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2025-04-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2027</title>
        <cusip>9128282L3</cusip>
        <identifiers>
          <isin value="US9128282L36"/>
        </identifiers>
        <balance>13404000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>15146586.00000000</valUSD>
        <pctVal>5.869897212226</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2027-07-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.37500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0.125%  10/15/2025</title>
        <cusip>91282CAQ4</cusip>
        <identifiers>
          <isin value="US91282CAQ42"/>
        </identifiers>
        <balance>14388000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>15519570.46000000</valUSD>
        <pctVal>6.014443345722</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2025-10-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 2% 01/15/26</title>
        <cusip>912810FS2</cusip>
        <identifiers>
          <isin value="US912810FS25"/>
        </identifiers>
        <balance>4935000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>7343363.31000000</valUSD>
        <pctVal>2.845841816877</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>2.00000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 2-3/8% 01/15/27</title>
        <cusip>912810PS1</cusip>
        <identifiers>
          <isin value="US912810PS15"/>
        </identifiers>
        <balance>5018000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>7483353.54000000</valUSD>
        <pctVal>2.900093531476</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2027-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>2.37500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/4% 07/15/2024</title>
        <cusip>912828WU0</cusip>
        <identifiers>
          <isin value="US912828WU04"/>
        </identifiers>
        <balance>14826000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>17866267.19000000</valUSD>
        <pctVal>6.923880534628</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2024-07-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/4% 01/15/2025</title>
        <cusip>912828H45</cusip>
        <identifiers>
          <isin value="US912828H458"/>
        </identifiers>
        <balance>13514000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>16176490.88000000</valUSD>
        <pctVal>6.269025820083</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2025-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.25000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 04/15/2027</title>
        <cusip>91282CEJ6</cusip>
        <identifiers>
          <isin value="US91282CEJ62"/>
        </identifiers>
        <balance>17369000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>16804454.47000000</valUSD>
        <pctVal>6.512386385053</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2027-04-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8%  07/15/2026</title>
        <cusip>912828S50</cusip>
        <identifiers>
          <isin value="US912828S505"/>
        </identifiers>
        <balance>12574000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>14529277.93000000</valUSD>
        <pctVal>5.630666079931</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-07-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 10/15/2026</title>
        <cusip>91282CDC2</cusip>
        <identifiers>
          <isin value="US91282CDC29"/>
        </identifiers>
        <balance>16203000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>16364605.47000000</valUSD>
        <pctVal>6.341927615077</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-10-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0.125%  10/15/2024</title>
        <cusip>912828YL8</cusip>
        <identifiers>
          <isin value="US912828YL86"/>
        </identifiers>
        <balance>14277000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>15854156.20000000</valUSD>
        <pctVal>6.144108466461</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2024-10-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.12500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2025</title>
        <cusip>912828XL9</cusip>
        <identifiers>
          <isin value="US912828XL95"/>
        </identifiers>
        <balance>14848000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>17726814.78000000</valUSD>
        <pctVal>6.869837246411</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2025-07-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.37500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 01/15/26</title>
        <cusip>912828N71</cusip>
        <identifiers>
          <isin value="US912828N712"/>
        </identifiers>
        <balance>12508000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>14886355.76000000</valUSD>
        <pctVal>5.769047769301</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2026-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.62500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 01/15/2024</title>
        <cusip>912828B25</cusip>
        <identifiers>
          <isin value="US912828B253"/>
        </identifiers>
        <balance>16058000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>19911014.91000000</valUSD>
        <pctVal>7.716300618027</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2024-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.62500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States of America</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>U.S. TREASURY INFLATION-PROTECTED SECURITIES 2-3/8% 01/15/25</title>
        <cusip>912810FR4</cusip>
        <identifiers>
          <isin value="US912810FR42"/>
        </identifiers>
        <balance>7308000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>11529867.20000000</valUSD>
        <pctVal>4.468276569691</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>USGA</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2025-01-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>2.37500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>SEI Daily Income Trust: Government Fund; Class F Shares</name>
        <lei>N/A</lei>
        <title>SEI DAILY INCOME TRUST GOVERNMENT FUND (#36)</title>
        <cusip>783965593</cusip>
        <identifiers>
          <isin value="US7839655930"/>
        </identifiers>
        <balance>1251409.63000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1251409.63000000</valUSD>
        <pctVal>0.484970401811</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2022-09-30</ncom:dateSigned>
      <ncom:nameOfApplicant>SEI INSTITUTIONAL MANAGED TRUST</ncom:nameOfApplicant>
      <ncom:signature>Ankit Puri</ncom:signature>
      <ncom:signerName>Ankit Puri</ncom:signerName>
      <ncom:title>CFO</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
