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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>Host Hotels &amp; Resorts, Inc.</name>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>Invesco Liquid Assets Portfolio</name>
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          <isin value="US8252527291"/>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>Hilton Worldwide Holdings Inc.</name>
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        <fairValLevel>1</fairValLevel>
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        <name>Invesco Private Prime Fund</name>
        <lei>N/A</lei>
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        <fairValLevel>2</fairValLevel>
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      <invstOrSec>
        <name>Healthpeak Properties, Inc.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      <invstOrSec>
        <name>PotlatchDeltic Corp.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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        <name>Essential Properties Realty Trust, Inc.</name>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>SBA Communications Corp.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      <invstOrSec>
        <name>Extra Space Storage Inc.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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        <name>Highwoods Properties, Inc.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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      <invstOrSec>
        <name>Agree Realty Corp.</name>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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        <name>Equity Residential</name>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>Healthcare Realty Trust Inc.</name>
        <lei>549300L0I14L7I0VLX84</lei>
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        <name>Equinix, Inc.</name>
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        <name>Prologis, Inc.</name>
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        <name>Americold Realty Trust, Inc.</name>
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        <name>Camden Property Trust</name>
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        <name>Terreno Realty Corp.</name>
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        <name>OUTFRONT Media Inc.</name>
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        <name>Alexandria Real Estate Equities, Inc.</name>
        <lei>MGCJBT4MKTQBVLNUIS88</lei>
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        <name>CubeSmart</name>
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        <name>Digital Realty Trust, Inc.</name>
        <lei>549300HKCZ31D08NEI41</lei>
        <title>Digital Realty Trust, Inc.</title>
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        <name>Kilroy Realty Corp.</name>
        <lei>549300CXXI18B214UN80</lei>
        <title>Kilroy Realty Corp.</title>
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        <name>Lamar Advertising Co.</name>
        <lei>529900Y8WW4MKVPTB543</lei>
        <title>Lamar Advertising Co., Class A</title>
        <cusip>512816109</cusip>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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        <fairValLevel>1</fairValLevel>
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        <name>Realty Income Corp.</name>
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        <name>VICI Properties Inc.</name>
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        <name>Invesco Government &amp; Agency Portfolio</name>
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        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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        <name>Welltower Inc.</name>
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      <invstOrSec>
        <name>Sun Communities, Inc.</name>
        <lei>549300H5GEOJYN41ZG57</lei>
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        <fairValLevel>1</fairValLevel>
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        <name>Public Storage</name>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>Crown Castle Inc.</name>
        <lei>54930012H97VSM0I2R19</lei>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>Rexford Industrial Realty, Inc.</name>
        <lei>549300MSLO0DF0EMX355</lei>
        <title>Rexford Industrial Realty, Inc.</title>
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        <valUSD>48378688.32000000</valUSD>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2024-03-30</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>
</edgarSubmission>
