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        <link:definition>9954474 - Disclosure - OPERATING SEGMENT INFORMATION (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="SIGNIFICANTACCOUNTINGJUDGEMENTSANDESTIMATESDetails" roleURI="http://legendbiotech.com/role/SIGNIFICANTACCOUNTINGJUDGEMENTSANDESTIMATESDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="OPERATINGSEGMENTINFORMATIONAdditionalInformationDetails" roleURI="http://legendbiotech.com/role/OPERATINGSEGMENTINFORMATIONAdditionalInformationDetails">
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSSummaryofAnalysisofRevenueDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSSummaryofAnalysisofRevenueDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSAdditionalInformationDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSAdditionalInformationDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSSummaryofDeferredRevenueDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSSummaryofDeferredRevenueDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSSummaryofTransactionPriceCompositionDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSSummaryofTransactionPriceCompositionDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSSummaryofTransactionPriceAllocationtoPerformanceObligationsDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSSummaryofTransactionPriceAllocationtoPerformanceObligationsDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSTransactionPriceAmountsAllocatedtoRemainingPerformanceObligationsDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSTransactionPriceAmountsAllocatedtoRemainingPerformanceObligationsDetails">
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      <link:roleType id="REVENUEOTHERINCOMEANDGAINSOtherIncomeandGainsDetails" roleURI="http://legendbiotech.com/role/REVENUEOTHERINCOMEANDGAINSOtherIncomeandGainsDetails">
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      <link:roleType id="INCOMETAXSummaryofTaxChargesDetails" roleURI="http://legendbiotech.com/role/INCOMETAXSummaryofTaxChargesDetails">
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      <link:roleType id="INCOMETAXSummaryofReconciliationofTaxExpenseApplicabletoLossBeforeTaxattheStatutoryRatesDetails" roleURI="http://legendbiotech.com/role/INCOMETAXSummaryofReconciliationofTaxExpenseApplicabletoLossBeforeTaxattheStatutoryRatesDetails">
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