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    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
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        </issuerCredentials>
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    </filerInfo>
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      <regName>LORD ABBETT SECURITIES TRUST</regName>
      <regFileNumber>811-07538</regFileNumber>
      <regCik>0000898031</regCik>
      <regLei>5493002HV0D15KTWO412</regLei>
      <regStreet1>30 HUDSON STREET</regStreet1>
      <regCity>JERSEY CITY</regCity>
      <regStateConditional regCountry="US" regState="US-NJ"/>
      <regZipOrPostalCode>07302</regZipOrPostalCode>
      <regPhone>201-827-2000</regPhone>
      <seriesName>Lord Abbett Alpha Strategy Fund</seriesName>
      <seriesId>S000007139</seriesId>
      <seriesLei>549300SWW68LOHCN3898</seriesLei>
      <repPdEnd>2025-10-31</repPdEnd>
      <repPdDate>2025-04-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>361061.76</totLiabs>
      <netAssets>542634306.82</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>
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      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>0.00000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
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        <othMon2 netRealizedGain="924739.29000000" netUnrealizedAppr="-31395556.11000000"/>
        <othMon3 netRealizedGain="932201.83000000" netUnrealizedAppr="972884.16000000"/>
      </returnInfo>
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      <mon2Flow redemption="9844571.83000000" reinvestment="0.00000000" sales="3926018.50000000"/>
      <mon3Flow redemption="8406531.39000000" reinvestment="0.00000000" sales="3942779.78000000"/>


    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>Lord Abbett Micro Cap Growth Fund</name>
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        <title>Lord Abbett Micro Cap Growth Fund</title>
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        <identifiers>
          <isin value="US54400V1044"/>
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        <balance>2875373.80000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>52993139.10000000</valUSD>
        <pctVal>9.765902825155</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Lord Abbett International Opportunities Fund</name>
        <lei>DJROU6QIURETNZO2HV24</lei>
        <title>Lord Abbett International Opportunities Fund</title>
        <cusip>543915813</cusip>
        <identifiers>
          <isin value="US5439158131"/>
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        <balance>5679962.39000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>116155230.96000000</valUSD>
        <pctVal>21.40580304269</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Lord Abbett Focused Small Cap Value Fund</name>
        <lei>549300TBYNRWTGRQG753</lei>
        <title>Lord Abbett Focused Small Cap Value Fund</title>
        <cusip>54400W102</cusip>
        <identifiers>
          <isin value="US54400W1027"/>
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        <balance>2082211.10000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>53408714.61000000</valUSD>
        <pctVal>9.842487645683</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Fixed Income Clearing Corp</name>
        <lei>549300H47WTHXPU08X20</lei>
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        <identifiers>
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        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <clearedCentCparty centralCounterparty="Fixed Income Clearing Corp" isCleared="Y"/>
          <isTriParty>N</isTriParty>
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              <invstCat>UST</invstCat>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Lord Abbett Value Opportunities Fund</name>
        <lei>549300DSLIHMAFWXRD49</lei>
        <title>Lord Abbett Value Opportunities Fund</title>
        <cusip>54400A506</cusip>
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          <isin value="US54400A5065"/>
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        <balance>5940262.43000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>108528594.58000000</valUSD>
        <pctVal>20.00031940774</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>Lord Abbett Small Cap Value Fund</name>
        <lei>5493007UOPFNCNRUAX11</lei>
        <title>Lord Abbett Small Cap Value Fund</title>
        <cusip>543913800</cusip>
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          <isin value="US5439138000"/>
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        <balance>5855657.64000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>106748638.74000000</valUSD>
        <pctVal>19.67229815703</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Lord Abbett Developing Growth Fund Inc</name>
        <lei>549300HWJ2W28SDTJF85</lei>
        <title>Lord Abbett Developing Growth Fund Inc</title>
        <cusip>544006505</cusip>
        <identifiers>
          <isin value="US5440065051"/>
        </identifiers>
        <balance>4138498.13000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>104745387.70000000</valUSD>
        <pctVal>19.30312668836</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-05-16</ncom:dateSigned>
      <ncom:nameOfApplicant>LORD ABBETT SECURITIES TRUST</ncom:nameOfApplicant>
      <ncom:signature>Michael Hebert</ncom:signature>
      <ncom:signerName>Michael Hebert</ncom:signerName>
      <ncom:title>Chief Financial Officer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
