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        <name>Invesco Treasury Portfolio</name>
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        <name>Broadstone Net Lease, Inc.</name>
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        <name>Healthcare Realty Trust Inc.</name>
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        <name>Prologis, Inc.</name>
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        <name>CubeSmart</name>
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        <name>Weyerhaeuser Co.</name>
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        <name>American Healthcare REIT, Inc.</name>
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        <name>American Tower Corp.</name>
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        <name>OUTFRONT Media Inc.</name>
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        <name>Ryman Hospitality Properties, Inc.</name>
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        <name>W.P. Carey Inc.</name>
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        <name>AvalonBay Communities, Inc.</name>
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        <name>Ventas, Inc.</name>
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        <name>Equity Residential</name>
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        <name>Simon Property Group, Inc.</name>
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        <name>Vornado Realty Trust</name>
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        <name>American Homes 4 Rent</name>
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        <name>Rexford Industrial Realty, Inc.</name>
        <lei>549300MSLO0DF0EMX355</lei>
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        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="1021128.26000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Brixmor Property Group Inc.</name>
        <lei>5299007UXW6Y0W2EGZ95</lei>
        <title>Brixmor Property Group Inc.</title>
        <cusip>11120U105</cusip>
        <identifiers>
          <isin value="US11120U1051"/>
        </identifiers>
        <balance>694588.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>18156530.32000000</valUSD>
        <pctVal>2.650924192571</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>Gaming and Leisure Properties, Inc.</name>
        <lei>5493006GWRDBCZYWTM57</lei>
        <title>Gaming and Leisure Properties, Inc.</title>
        <cusip>36467J108</cusip>
        <identifiers>
          <isin value="US36467J1088"/>
        </identifiers>
        <balance>402027.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>17500235.31000000</valUSD>
        <pctVal>2.555102563173</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>Extra Space Storage Inc.</name>
        <lei>529900SDJHKRQWED6A16</lei>
        <title>Extra Space Storage Inc.</title>
        <cusip>30225T102</cusip>
        <identifiers>
          <isin value="US30225T1025"/>
        </identifiers>
        <balance>216689.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>28856474.13000000</valUSD>
        <pctVal>4.213157692318</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>First Industrial Realty Trust, Inc.</name>
        <lei>N/A</lei>
        <title>First Industrial Realty Trust, Inc.</title>
        <cusip>32054K103</cusip>
        <identifiers>
          <isin value="US32054K1034"/>
        </identifiers>
        <balance>394676.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>22591254.24000000</valUSD>
        <pctVal>3.298411169417</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>Omega Healthcare Investors, Inc.</name>
        <lei>549300OJ7ENK42CZ8E73</lei>
        <title>Omega Healthcare Investors, Inc.</title>
        <cusip>681936100</cusip>
        <identifiers>
          <isin value="US6819361006"/>
        </identifiers>
        <balance>456713.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>20972260.96000000</valUSD>
        <pctVal>3.062031840441</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>CareTrust REIT, Inc.</name>
        <lei>5493001NVXE2B9GPLU96</lei>
        <title>CareTrust REIT, Inc.</title>
        <cusip>14174T107</cusip>
        <identifiers>
          <isin value="US14174T1079"/>
        </identifiers>
        <balance>220850.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>8288500.50000000</valUSD>
        <pctVal>1.210153377784</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>Lamar Advertising Co.</name>
        <lei>529900Y8WW4MKVPTB543</lei>
        <title>Lamar Advertising Co., Class A</title>
        <cusip>512816109</cusip>
        <identifiers>
          <isin value="US5128161099"/>
        </identifiers>
        <balance>104568.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>13843757.52000000</valUSD>
        <pctVal>2.021242554555</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>
          <loanByFundCondition isLoanByFund="Y" loanVal="880990.26000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Crown Castle Inc.</name>
        <lei>54930012H97VSM0I2R19</lei>
        <title>Crown Castle Inc.</title>
        <cusip>22822V101</cusip>
        <identifiers>
          <isin value="US22822V1017"/>
        </identifiers>
        <balance>354547.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>32363050.16000000</valUSD>
        <pctVal>4.725131459728</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>Iron Mountain Inc.</name>
        <lei>SQL3F6CKNNBM3SQGHX24</lei>
        <title>Iron Mountain Inc.</title>
        <cusip>46284V101</cusip>
        <identifiers>
          <isin value="US46284V1017"/>
        </identifiers>
        <balance>338935.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>29267037.25000000</valUSD>
        <pctVal>4.273101508026</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>UDR, Inc.</name>
        <lei>P3CH2EG5X6Z1XWU1OO74</lei>
        <title>UDR, Inc.</title>
        <cusip>902653104</cusip>
        <identifiers>
          <isin value="US9026531049"/>
        </identifiers>
        <balance>409948.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>14930306.16000000</valUSD>
        <pctVal>2.179882890865</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>Equinix, Inc.</name>
        <lei>549300EVUN2BTLJ3GT74</lei>
        <title>Equinix, Inc.</title>
        <cusip>29444U700</cusip>
        <identifiers>
          <isin value="US29444U7000"/>
        </identifiers>
        <balance>33454.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>25201232.74000000</valUSD>
        <pctVal>3.679478202919</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>Welltower Inc.</name>
        <lei>254900F33BIAR82QTA19</lei>
        <title>Welltower Inc.</title>
        <cusip>95040Q104</cusip>
        <identifiers>
          <isin value="US95040Q1040"/>
        </identifiers>
        <balance>307898.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>64110521.56000000</valUSD>
        <pctVal>9.360386021252</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>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2025-12-30</ncom:dateSigned>
      <ncom:nameOfApplicant>AIM Investment Securities Funds (Invesco Investment Securities Funds)</ncom:nameOfApplicant>
      <ncom:signature>Adrien Deberghes</ncom:signature>
      <ncom:signerName>Adrien Deberghes</ncom:signerName>
      <ncom:title>Principal Financial Officer and Treasurer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
