<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.regeneron.com/role/AccountsPayableAndAccruedExpenses" xlink:href="regn-20140331.xsd#AccountsPayableAndAccruedExpenses" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/AccountsPayableAndAccruedExpensesDetails" xlink:href="regn-20140331.xsd#AccountsPayableAndAccruedExpensesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/AccountsPayableAndAccruedExpensesTables" xlink:href="regn-20140331.xsd#AccountsPayableAndAccruedExpensesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/CollaborationAgreements" xlink:href="regn-20140331.xsd#CollaborationAgreements" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/CollaborationAgreementsDetails" xlink:href="regn-20140331.xsd#CollaborationAgreementsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/CollaborationAgreementsTables" xlink:href="regn-20140331.xsd#CollaborationAgreementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/ConsolidatedBalanceSheets" xlink:href="regn-20140331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="regn-20140331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="regn-20140331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" xlink:href="regn-20140331.xsd#ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="regn-20140331.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/DocumentAndEntityInformation" xlink:href="regn-20140331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/FairValueMeasurements" xlink:href="regn-20140331.xsd#FairValueMeasurements" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/FairValueMeasurementsDetails" xlink:href="regn-20140331.xsd#FairValueMeasurementsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/FairValueMeasurementsTables" xlink:href="regn-20140331.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/IncomeTaxes" xlink:href="regn-20140331.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/IncomeTaxesDetails" xlink:href="regn-20140331.xsd#IncomeTaxesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/IncomeTaxesTables" xlink:href="regn-20140331.xsd#IncomeTaxesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/InterimFinancialStatements" xlink:href="regn-20140331.xsd#InterimFinancialStatements" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/Inventory" xlink:href="regn-20140331.xsd#Inventory" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/InventoryDetails" xlink:href="regn-20140331.xsd#InventoryDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/InventoryTables" xlink:href="regn-20140331.xsd#InventoryTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/LegalMatters" xlink:href="regn-20140331.xsd#LegalMatters" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/LegalMattersDetails" xlink:href="regn-20140331.xsd#LegalMattersDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/LegalMattersPolicies" xlink:href="regn-20140331.xsd#LegalMattersPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/MarketableSecurities" xlink:href="regn-20140331.xsd#MarketableSecurities" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/MarketableSecuritiesDetails" xlink:href="regn-20140331.xsd#MarketableSecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/MarketableSecuritiesTables" xlink:href="regn-20140331.xsd#MarketableSecuritiesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetIncomePerShare" xlink:href="regn-20140331.xsd#NetIncomePerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetIncomePerShareDetails" xlink:href="regn-20140331.xsd#NetIncomePerShareDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetIncomePerShareTables" xlink:href="regn-20140331.xsd#NetIncomePerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetProductSales" xlink:href="regn-20140331.xsd#NetProductSales" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetProductSalesDetails" xlink:href="regn-20140331.xsd#NetProductSalesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetProductSalesPolicies" xlink:href="regn-20140331.xsd#NetProductSalesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/NetProductSalesTables" xlink:href="regn-20140331.xsd#NetProductSalesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/StatementOfCashFlows" xlink:href="regn-20140331.xsd#StatementOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/StatementOfCashFlowsDetails" xlink:href="regn-20140331.xsd#StatementOfCashFlowsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/SubsequentEvents" xlink:href="regn-20140331.xsd#SubsequentEvents" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/SubsequentEventsDetails" xlink:href="regn-20140331.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.regeneron.com/role/SubsequentEventsTables" xlink:href="regn-20140331.xsd#SubsequentEventsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <presentationLink xlink:role="http://www.regeneron.com/role/AccountsPayableAndAccruedExpenses" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_6A0CCA274834CB6CFE674B04130D3AF7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock" xlink:label="loc_us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_882579D7CD4A32252B254B04130D2430" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_6A0CCA274834CB6CFE674B04130D3AF7" xlink:to="loc_us-gaap_AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock_882579D7CD4A32252B254B04130D2430" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/AccountsPayableAndAccruedExpensesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_3DD3A33142EAD321E35E4B0412CF826A" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_3DD3A33142EAD321E35E4B0412CF826A" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableTradeCurrent" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_BFA91A144AB5E094D61D4B0412CF026E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_BFA91A144AB5E094D61D4B0412CF026E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_21A578D5E20148F1C0884B0412CF5801" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_21A578D5E20148F1C0884B0412CF5801" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_AccruedClinicalTrialExpenseCurrent" xlink:label="loc_regn_AccruedClinicalTrialExpenseCurrent_D490010E320079B6A8B04B0412CF1664" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_regn_AccruedClinicalTrialExpenseCurrent_D490010E320079B6A8B04B0412CF1664" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_AccruedSalesRelatedDeductionsAndRoyalties" xlink:label="loc_regn_AccruedSalesRelatedDeductionsAndRoyalties_A832AA985084E2703CDF4B0412CFC4E5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_regn_AccruedSalesRelatedDeductionsAndRoyalties_A832AA985084E2703CDF4B0412CFC4E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_2DD4CAE83848D73DDFC94B0412CF44BD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_2DD4CAE83848D73DDFC94B0412CF44BD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_589E49437F6E8D65CEF34B0412CFF870" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_492EBBB31FCC418BBB7F4B0412CFEEDC" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_589E49437F6E8D65CEF34B0412CFF870" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/AccountsPayableAndAccruedExpensesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_666F011546E655A3002E4B041273DECA" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_017F87CE3523A34460654B04127342B5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_666F011546E655A3002E4B041273DECA" xlink:to="loc_us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_017F87CE3523A34460654B04127342B5" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/CollaborationAgreements" xlink:type="extended">
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementAbstract" xlink:label="loc_regn_CollaborationAgreementAbstract_7C4515E936596AFF4829B94A172E0A80" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable" xlink:label="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_F1E9BD9E0441E1EAF0FBB9550CE0A3E0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_7C4515E936596AFF4829B94A172E0A80" xlink:to="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_F1E9BD9E0441E1EAF0FBB9550CE0A3E0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_956CE260E4C6581F2C64B9550CE05A28" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_F1E9BD9E0441E1EAF0FBB9550CE0A3E0" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_956CE260E4C6581F2C64B9550CE05A28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_4947CC075B0D175DA58AB9550CE007F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_956CE260E4C6581F2C64B9550CE05A28" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_4947CC075B0D175DA58AB9550CE007F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis" xlink:label="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_3C37ABD9AE6639B5C9EDB9550CE0722E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_F1E9BD9E0441E1EAF0FBB9550CE0A3E0" xlink:to="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_3C37ABD9AE6639B5C9EDB9550CE0722E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProjectMember" xlink:label="loc_us-gaap_ProjectMember_909134D3CF448B5D2E1FB9550CE0D6C2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_3C37ABD9AE6639B5C9EDB9550CE0722E" xlink:to="loc_us-gaap_ProjectMember_909134D3CF448B5D2E1FB9550CE0D6C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_B8DEBD1A8D76157071DDB9550CE056A3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_F1E9BD9E0441E1EAF0FBB9550CE0A3E0" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_B8DEBD1A8D76157071DDB9550CE056A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CollaborativeArrangementDisclosureTextBlock" xlink:label="loc_us-gaap_CollaborativeArrangementDisclosureTextBlock_A38A6781F01BC3B16B3CB94A172EA92A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_7C4515E936596AFF4829B94A172E0A80" xlink:to="loc_us-gaap_CollaborativeArrangementDisclosureTextBlock_A38A6781F01BC3B16B3CB94A172EA92A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/CollaborationAgreementsDetails" xlink:type="extended">
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementAbstract" xlink:label="loc_regn_CollaborationAgreementAbstract_A375E15E4742DE30734BBE50E8D9C9E0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable" xlink:label="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_A375E15E4742DE30734BBE50E8D9C9E0" xlink:to="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_56A6B64DE31A7D939266BE50E8D95395" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_us-gaap_RangeAxis_56A6B64DE31A7D939266BE50E8D95395" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_CAEC5AF94F59408D321BBE50E8D913DB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_56A6B64DE31A7D939266BE50E8D95395" xlink:to="loc_us-gaap_RangeMember_CAEC5AF94F59408D321BBE50E8D913DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_DD4C61991E7D756C769DBE50E8D9DC40" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_us-gaap_StatementGeographicalAxis_DD4C61991E7D756C769DBE50E8D9DC40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_786EBCFFEC4D17A18DBBBE50E8D9FF8C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_DD4C61991E7D756C769DBE50E8D9DC40" xlink:to="loc_us-gaap_SegmentGeographicalDomain_786EBCFFEC4D17A18DBBBE50E8D9FF8C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_AE270D8773BC5CEC863BBE50E8D989A0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_AE270D8773BC5CEC863BBE50E8D989A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_AE270D8773BC5CEC863BBE50E8D989A0" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementwithBayerHealthCareMember" xlink:label="loc_regn_CollaborationAgreementwithBayerHealthCareMember_0CC13826E1953243F988BE50E8D9B098" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:to="loc_regn_CollaborationAgreementwithBayerHealthCareMember_0CC13826E1953243F988BE50E8D9B098" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementWithBayerHealthcareLlcMember" xlink:label="loc_regn_CollaborationAgreementWithBayerHealthcareLlcMember_6CF106EA3971A1E29EF4BE50E8D90FD0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:to="loc_regn_CollaborationAgreementWithBayerHealthcareLlcMember_6CF106EA3971A1E29EF4BE50E8D90FD0" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_PDGFRbetaoutsidetheUSMember" xlink:label="loc_regn_PDGFRbetaoutsidetheUSMember_481705147952BD83962EBE50E8D99827" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:to="loc_regn_PDGFRbetaoutsidetheUSMember_481705147952BD83962EBE50E8D99827" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_BRVOMember" xlink:label="loc_regn_BRVOMember_659E6FC66D11F885EAAEBE50E8D91B54" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_F32069BD1FFB142B1097BE50E8D98AC4" xlink:to="loc_regn_BRVOMember_659E6FC66D11F885EAAEBE50E8D91B54" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductAxis" xlink:label="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductAxis_42AFC35AADD5B876F6E5BE50E8D97118" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductAxis_42AFC35AADD5B876F6E5BE50E8D97118" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductDomain" xlink:label="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductDomain_49B913D0FE014CEBC888BE50E8D9CAA0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductAxis_42AFC35AADD5B876F6E5BE50E8D97118" xlink:to="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductDomain_49B913D0FE014CEBC888BE50E8D9CAA0" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_AfliberceptAgreementMember" xlink:label="loc_regn_AfliberceptAgreementMember_B90A13D473C5B15AB51CBE50E8D94CEC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductDomain_49B913D0FE014CEBC888BE50E8D9CAA0" xlink:to="loc_regn_AfliberceptAgreementMember_B90A13D473C5B15AB51CBE50E8D94CEC" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_AntibodyCollaborationMember" xlink:label="loc_regn_AntibodyCollaborationMember_D37B4DAFC75379FD4367BE50E8D9430B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_ResearchAndDevelopmentArrangementContractToPerformForOthersByProductDomain_49B913D0FE014CEBC888BE50E8D9CAA0" xlink:to="loc_regn_AntibodyCollaborationMember_D37B4DAFC75379FD4367BE50E8D9430B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_4C45EB3589CD41B9ED58BE50E8D961FB" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_us-gaap_TypeOfArrangementAxis_4C45EB3589CD41B9ED58BE50E8D961FB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TypeOfArrangementAxis_4C45EB3589CD41B9ED58BE50E8D961FB" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Salesachievement500millionMember" xlink:label="loc_regn_Salesachievement500millionMember_9C2BF438A6A15F20B768BE50E8D939CF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:to="loc_regn_Salesachievement500millionMember_9C2BF438A6A15F20B768BE50E8D939CF" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Salesachievement600millionMember" xlink:label="loc_regn_Salesachievement600millionMember_D7C0AB018E329E5DB9EABE50E8D9A4A7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:to="loc_regn_Salesachievement600millionMember_D7C0AB018E329E5DB9EABE50E8D9A4A7" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Salesachievement1billionMember" xlink:label="loc_regn_Salesachievement1billionMember_1AC21E1145C6A4168BC3BE50E8D9E79E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:to="loc_regn_Salesachievement1billionMember_1AC21E1145C6A4168BC3BE50E8D9E79E" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Salesachievement200millionMember" xlink:label="loc_regn_Salesachievement200millionMember_38A9C095881EE5F72DEDBE50E8D9047D" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_C174288CE469AAF23076BE50E8D93FDD" xlink:to="loc_regn_Salesachievement200millionMember_38A9C095881EE5F72DEDBE50E8D9047D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_2E340FDE8879C607D6F0BE50E8D90749" xlink:to="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_PercentageOfTrialCostsBorneByCollaboratingParty" xlink:label="loc_regn_PercentageOfTrialCostsBorneByCollaboratingParty_0C76787C7F9D245DFC38BE50E8D90B0D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_PercentageOfTrialCostsBorneByCollaboratingParty_0C76787C7F9D245DFC38BE50E8D90B0D" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_PercentageOfTrialCostsBorneByEntity" xlink:label="loc_regn_PercentageOfTrialCostsBorneByEntity_E4914734FDF3E6513986BE50E8D9C44F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_PercentageOfTrialCostsBorneByEntity_E4914734FDF3E6513986BE50E8D9C44F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_8339B6B2898A251D95F8BE50E8D9725B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_8339B6B2898A251D95F8BE50E8D9725B" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Optinpayment" xlink:label="loc_regn_Optinpayment_26BE4484EF1CE1590E07BE50E8D9887E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Optinpayment_26BE4484EF1CE1590E07BE50E8D9887E" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Amountofmilestonepaymentthatmaybereceivedrelatingtomarketingapproval" xlink:label="loc_regn_Amountofmilestonepaymentthatmaybereceivedrelatingtomarketingapproval_CF41669F85DED77F189ABE50E8D9C5DD" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Amountofmilestonepaymentthatmaybereceivedrelatingtomarketingapproval_CF41669F85DED77F189ABE50E8D9C5DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_OtherResearchAndDevelopmentExpense_B3BE5445391B7C50ADC1BE50E8D9FA43" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_OtherResearchAndDevelopmentExpense_B3BE5445391B7C50ADC1BE50E8D9FA43" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Maximumamountofmilestonepaymentsthatmaybereceivedifcertainsalesareachieved" xlink:label="loc_regn_Maximumamountofmilestonepaymentsthatmaybereceivedifcertainsalesareachieved_C89114F4562E2CCEFEA9BE50E8D9D219" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Maximumamountofmilestonepaymentsthatmaybereceivedifcertainsalesareachieved_C89114F4562E2CCEFEA9BE50E8D9D219" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_NumberofsalesmilestonepaymentstheCompanyreceived" xlink:label="loc_regn_NumberofsalesmilestonepaymentstheCompanyreceived_BE958B9790BB03705AF2BE50E8D9B3BB" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_NumberofsalesmilestonepaymentstheCompanyreceived_BE958B9790BB03705AF2BE50E8D9B3BB" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_NumberofPaymentstheCompanymade" xlink:label="loc_regn_NumberofPaymentstheCompanymade_A020FD37A853E60769B1BE50E8D95E69" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_NumberofPaymentstheCompanymade_A020FD37A853E60769B1BE50E8D95E69" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_NetProfitLossFromCommercializationOfProductsUnderCollaborationAgreement" xlink:label="loc_regn_NetProfitLossFromCommercializationOfProductsUnderCollaborationAgreement_36EFEFD3CA20FF08D43CBE50E8D904FD" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_NetProfitLossFromCommercializationOfProductsUnderCollaborationAgreement_36EFEFD3CA20FF08D43CBE50E8D904FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized" xlink:label="loc_us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized_7C0FB0C22A4BF5CDFBDCBE50E8D93CBC" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized_7C0FB0C22A4BF5CDFBDCBE50E8D93CBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned_8FD5B8FDD6DA5C1A9536BE50E8D96E3C" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned_8FD5B8FDD6DA5C1A9536BE50E8D96E3C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ContractsRevenue" xlink:label="loc_us-gaap_ContractsRevenue_8A768103CE4D38E78012BE50E8D9F526" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_ContractsRevenue_8A768103CE4D38E78012BE50E8D9F526" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="loc_us-gaap_RevenueFromRelatedParties_291007105BC40C987A28BE50E8D97D09" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_RevenueFromRelatedParties_291007105BC40C987A28BE50E8D97D09" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_OtherCollaborationRevenue" xlink:label="loc_regn_OtherCollaborationRevenue_E05E140FA20510748BA3BE50E8D92708" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_OtherCollaborationRevenue_E05E140FA20510748BA3BE50E8D92708" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Futuredevelopmentmilestonepayments" xlink:label="loc_regn_Futuredevelopmentmilestonepayments_07AB8199ACC71265C53EBE50E8D98E2F" xlink:type="locator" />
    <presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Futuredevelopmentmilestonepayments_07AB8199ACC71265C53EBE50E8D98E2F" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_MilestonePayment" xlink:label="loc_regn_MilestonePayment_BC2AAA73A97D37F53E2ABE50E8D9E68F" xlink:type="locator" />
    <presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_MilestonePayment_BC2AAA73A97D37F53E2ABE50E8D9E68F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRevenueAdditions" xlink:label="loc_us-gaap_DeferredRevenueAdditions_0CCF40CED682174CFAADBE50E8D9768E" xlink:type="locator" />
    <presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_us-gaap_DeferredRevenueAdditions_0CCF40CED682174CFAADBE50E8D9768E" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived" xlink:label="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived_F4FCB28D1B93FA33C28FBE50E8D99052" xlink:type="locator" />
    <presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived_F4FCB28D1B93FA33C28FBE50E8D99052" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived5thtier" xlink:label="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived5thtier_76FA82AD14868B4AB872BE50E8D91DFC" xlink:type="locator" />
    <presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentswerereceived5thtier_76FA82AD14868B4AB872BE50E8D91DFC" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_PeriodForAchievingSalesTargetForMilestonePaymentRollingBasis" xlink:label="loc_regn_PeriodForAchievingSalesTargetForMilestonePaymentRollingBasis_BABF686D4D1D4AB8FFCCBE50E8D942A3" xlink:type="locator" />
    <presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_PeriodForAchievingSalesTargetForMilestonePaymentRollingBasis_BABF686D4D1D4AB8FFCCBE50E8D942A3" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentsmaybereceived200million" xlink:label="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentsmaybereceived200million_516D39A9F218CBA66C60BE50E8D94219" xlink:type="locator" />
    <presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Levelsoftwelvemonthsalesatwhichsalesmilestonepaymentsmaybereceived200million_516D39A9F218CBA66C60BE50E8D94219" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Levelsoftwelvemonthssalesatwhichsalesmilestonepaymentsmaybereceived1billion" xlink:label="loc_regn_Levelsoftwelvemonthssalesatwhichsalesmilestonepaymentsmaybereceived1billion_D55619CE7C87986A052ABE50E8D955B8" xlink:type="locator" />
    <presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Levelsoftwelvemonthssalesatwhichsalesmilestonepaymentsmaybereceived1billion_D55619CE7C87986A052ABE50E8D955B8" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_MaximumAmountOfSalesMilestonePaymentsIfTotalSalesAchieveSpecificLevels" xlink:label="loc_regn_MaximumAmountOfSalesMilestonePaymentsIfTotalSalesAchieveSpecificLevels_809A96C4F4852FC8B079BE50E8D9EF9A" xlink:type="locator" />
    <presentationArc order="24" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_MaximumAmountOfSalesMilestonePaymentsIfTotalSalesAchieveSpecificLevels_809A96C4F4852FC8B079BE50E8D9EF9A" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_AmountOfNonRefundablePaymentReceivedForCollaborationAgreement" xlink:label="loc_regn_AmountOfNonRefundablePaymentReceivedForCollaborationAgreement_6518E32A098C4B4F369BBE50E8D95464" xlink:type="locator" />
    <presentationArc order="25" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_AmountOfNonRefundablePaymentReceivedForCollaborationAgreement_6518E32A098C4B4F369BBE50E8D95464" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Percentageofglobaldevelopmentcosttobepaidbythecollaborationpartnerunderthecollaboration" xlink:label="loc_regn_Percentageofglobaldevelopmentcosttobepaidbythecollaborationpartnerunderthecollaboration_1D55CCFB2C8F15B6CECABE50E8D99B57" xlink:type="locator" />
    <presentationArc order="26" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Percentageofglobaldevelopmentcosttobepaidbythecollaborationpartnerunderthecollaboration_1D55CCFB2C8F15B6CECABE50E8D99B57" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_PercentageofdevelopmentcostfortheterritoryoutsidetheUnitedStatestobepaidforunderthecollaboration" xlink:label="loc_regn_PercentageofdevelopmentcostfortheterritoryoutsidetheUnitedStatestobepaidforunderthecollaboration_ED08DF6DF0F8D7593B9FBE50E8D91B2C" xlink:type="locator" />
    <presentationArc order="27" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_PercentageofdevelopmentcostfortheterritoryoutsidetheUnitedStatestobepaidforunderthecollaboration_ED08DF6DF0F8D7593B9FBE50E8D91B2C" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Percentageofdevelopmentmilestonepaymentstobereimbursed" xlink:label="loc_regn_Percentageofdevelopmentmilestonepaymentstobereimbursed_8F2CBCE2F1DD04BB696CBE50E8D925C0" xlink:type="locator" />
    <presentationArc order="28" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_Percentageofdevelopmentmilestonepaymentstobereimbursed_8F2CBCE2F1DD04BB696CBE50E8D925C0" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_NumberofdevelopmentmilestonepaymentstheCompanyreceived" xlink:label="loc_regn_NumberofdevelopmentmilestonepaymentstheCompanyreceived_F381D5B5E6E411C1DF18BE50E8D96BDB" xlink:type="locator" />
    <presentationArc order="29" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_D7A88132A9075974BB68BE50E8D94770" xlink:to="loc_regn_NumberofdevelopmentmilestonepaymentstheCompanyreceived_F381D5B5E6E411C1DF18BE50E8D96BDB" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/CollaborationAgreementsTables" xlink:type="extended">
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementAbstract" xlink:label="loc_regn_CollaborationAgreementAbstract_CC909050248AA841E3DBB94A1818BC85" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable" xlink:label="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_1AAC5F869C2CED5B35DCB94A18182601" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_CC909050248AA841E3DBB94A1818BC85" xlink:to="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_1AAC5F869C2CED5B35DCB94A18182601" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_CB0F5B51B804E64666A8B94A18181151" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_1AAC5F869C2CED5B35DCB94A18182601" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_CB0F5B51B804E64666A8B94A18181151" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_4EC4507E343345088BDDB94A18188D2F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_CB0F5B51B804E64666A8B94A18181151" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_4EC4507E343345088BDDB94A18188D2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis" xlink:label="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_B13A39B8C9CEE2D1D7CFB94A18181C9E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_1AAC5F869C2CED5B35DCB94A18182601" xlink:to="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_B13A39B8C9CEE2D1D7CFB94A18181C9E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProjectMember" xlink:label="loc_us-gaap_ProjectMember_E7833F6DFD89392C8A01B94A1818A8D8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_B13A39B8C9CEE2D1D7CFB94A18181C9E" xlink:to="loc_us-gaap_ProjectMember_E7833F6DFD89392C8A01B94A1818A8D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_FB49AC4A8E922763FC72B94A1818760A" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfResearchAndDevelopmentArrangementContractToPerformForOthersTable_1AAC5F869C2CED5B35DCB94A18182601" xlink:to="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_FB49AC4A8E922763FC72B94A1818760A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_B546D2C952736BEE5E32B94A1818DBF0" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_CC909050248AA841E3DBB94A1818BC85" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_B546D2C952736BEE5E32B94A1818DBF0" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationRevenueTableTextBlock" xlink:label="loc_regn_CollaborationRevenueTableTextBlock_F4FB0C717DC0ACB0C6C3B94A1818DF3B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_CollaborationAgreementAbstract_CC909050248AA841E3DBB94A1818BC85" xlink:to="loc_regn_CollaborationRevenueTableTextBlock_F4FB0C717DC0ACB0C6C3B94A1818DF3B" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_3ECCA45AE84B5E705B98B7F076BCA159" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_3D12A0ACCC1D47B41FF3B7F076BC7287" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_3ECCA45AE84B5E705B98B7F076BCA159" xlink:to="loc_us-gaap_StatementTable_3D12A0ACCC1D47B41FF3B7F076BC7287" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_8903FB52008681CECDAFB7F076BC7FB1" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_3D12A0ACCC1D47B41FF3B7F076BC7287" xlink:to="loc_us-gaap_StatementClassOfStockAxis_8903FB52008681CECDAFB7F076BC7FB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_F9B210C2BE448E58B947B7F076BCBB10" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementClassOfStockAxis_8903FB52008681CECDAFB7F076BC7FB1" xlink:to="loc_us-gaap_ClassOfStockDomain_F9B210C2BE448E58B947B7F076BCBB10" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_A98F21A3D17503562D93B7F076BC2B1B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_F9B210C2BE448E58B947B7F076BCBB10" xlink:to="loc_us-gaap_CommonClassAMember_A98F21A3D17503562D93B7F076BC2B1B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_08AFE6D9D5C078F5B846B7F076BCD0A2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_F9B210C2BE448E58B947B7F076BCBB10" xlink:to="loc_us-gaap_CommonStockMember_08AFE6D9D5C078F5B846B7F076BCD0A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_3D12A0ACCC1D47B41FF3B7F076BC7287" xlink:to="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:to="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_B33C16F51E441AE58F38B7F076BCD111" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_B33C16F51E441AE58F38B7F076BCD111" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_3EA570CBF734724F7277B7F076BC7361" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_3EA570CBF734724F7277B7F076BC7361" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_FDEF6F3F02A13E0B1A71B7F076BC3D59" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_FDEF6F3F02A13E0B1A71B7F076BC3D59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableRelatedPartiesCurrent" xlink:label="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_7CC81D21CD34F5A807FFB7F0792C2BBF" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_7CC81D21CD34F5A807FFB7F0792C2BBF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsAndNotesReceivableNet" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_1681DC26DB874E9BC859B7F35290FB53" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_1681DC26DB874E9BC859B7F35290FB53" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_764B007D38BF5179CFFEB7F076BC5449" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_InventoryNet_764B007D38BF5179CFFEB7F076BC5449" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_4BBFC129AC56985455C2B7F076BC2B21" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_4BBFC129AC56985455C2B7F076BC2B21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_B1D6F302204D39C010D6B7F076BCC530" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_B1D6F302204D39C010D6B7F076BCC530" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_0FA0F8C11B6C2A87346BB7F076BCD4F5" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_5F22C17A1616E86EE757B7F076BC8336" xlink:to="loc_us-gaap_AssetsCurrent_0FA0F8C11B6C2A87346BB7F076BCD4F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesNoncurrent" xlink:label="loc_us-gaap_MarketableSecuritiesNoncurrent_9B7540EA1B6CE1AEFC33B7F076BCE356" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_MarketableSecuritiesNoncurrent_9B7540EA1B6CE1AEFC33B7F076BCE356" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_35CC1BBF62B145F78007B7F076BC87A0" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_35CC1BBF62B145F78007B7F076BC87A0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_22827D9113A1DC9A49F4B7F076BC8830" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_22827D9113A1DC9A49F4B7F076BC8830" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_86D418782273B42E5166B7F076BC5D33" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_86D418782273B42E5166B7F076BC5D33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_52940C75B4F89E75D998B7F076BC49D8" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_8EA5C679279F7EE1940CB7F076BCF7F8" xlink:to="loc_us-gaap_Assets_52940C75B4F89E75D998B7F076BC49D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_DEADE5E0418FA239FCF8B7F076BC56A6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_DEADE5E0418FA239FCF8B7F076BC56A6" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_DeferredRevenueFromRelatedPartyCurrent" xlink:label="loc_regn_DeferredRevenueFromRelatedPartyCurrent_5D3DBAFB86C4D10CB6F7B7F076BCB55B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:to="loc_regn_DeferredRevenueFromRelatedPartyCurrent_5D3DBAFB86C4D10CB6F7B7F076BCB55B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_9ED4956FDE6FCCB436BEB7F076BCFDF6" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:to="loc_us-gaap_DeferredRevenueCurrent_9ED4956FDE6FCCB436BEB7F076BCFDF6" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_FacilityLeaseObligationsCurrent" xlink:label="loc_regn_FacilityLeaseObligationsCurrent_0298ED3AE658DC56C23EB8249E86FBC5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:to="loc_regn_FacilityLeaseObligationsCurrent_0298ED3AE658DC56C23EB8249E86FBC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_7FFB5C90B666027BAFA4B7F076BC7A48" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C62DDFE636B791AEC20B7F076BC9F5F" xlink:to="loc_us-gaap_LiabilitiesCurrent_7FFB5C90B666027BAFA4B7F076BC7A48" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_DeferredRevenueFromRelatedPartyNoncurrent" xlink:label="loc_regn_DeferredRevenueFromRelatedPartyNoncurrent_182192DEA31239234509B7F076BC27FE" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_regn_DeferredRevenueFromRelatedPartyNoncurrent_182192DEA31239234509B7F076BC27FE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="loc_us-gaap_DeferredRevenueNoncurrent_29B69BBFB89909DC970CB7F076BC7CDE" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_us-gaap_DeferredRevenueNoncurrent_29B69BBFB89909DC970CB7F076BC7CDE" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_FacilityLeaseObligationsNoncurrent" xlink:label="loc_regn_FacilityLeaseObligationsNoncurrent_59A400B31930F0A3516AB7F076BCD740" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_regn_FacilityLeaseObligationsNoncurrent_59A400B31930F0A3516AB7F076BCD740" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConvertibleLongTermNotesPayable" xlink:label="loc_us-gaap_ConvertibleLongTermNotesPayable_365F279CD9646A3A887BB7F076BCDD3D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_us-gaap_ConvertibleLongTermNotesPayable_365F279CD9646A3A887BB7F076BCDD3D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_C60985971DF6F114EC4EB7F076BC477F" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_C60985971DF6F114EC4EB7F076BC477F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_28AED442045C328E8BD2B7F076BC072F" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_090469C00E2DA8655D37B7F076BCD9EB" xlink:to="loc_us-gaap_Liabilities_28AED442045C328E8BD2B7F076BC072F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:to="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_45EC81A8559EA19C982CB7F076BC41C2" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_PreferredStockValue_45EC81A8559EA19C982CB7F076BC41C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_56364E1BBDA8BD8751CAB7F076BCC725" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_CommonStockValue_56364E1BBDA8BD8751CAB7F076BCC725" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_A5EC8210BA3C09A9139BB7F076BC563F" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_AdditionalPaidInCapital_A5EC8210BA3C09A9139BB7F076BC563F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_CA955732352311984A39B7F076BC7623" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_CA955732352311984A39B7F076BC7623" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_686CAC33F975433AEF50B7F076BC2809" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_686CAC33F975433AEF50B7F076BC2809" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_A47075228871BA4FCF3AB7F076BC1A7E" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_90BA80F6619CF4E2B85EB7F076BC5FD8" xlink:to="loc_us-gaap_StockholdersEquity_A47075228871BA4FCF3AB7F076BC1A7E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_B46958E6F351DCE17F2DB7F076BC445E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_A5C94A3BA975A61E6B06B7F076BC05EE" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_B46958E6F351DCE17F2DB7F076BC445E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_D6BFF1422500B01018094B0411C573C1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_3D4E2A751D5D822A92E44B0411C559EF" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_D6BFF1422500B01018094B0411C573C1" xlink:to="loc_us-gaap_StatementTable_3D4E2A751D5D822A92E44B0411C559EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_823981947F9B2A4A405E4B0411C52DEE" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_3D4E2A751D5D822A92E44B0411C559EF" xlink:to="loc_us-gaap_StatementClassOfStockAxis_823981947F9B2A4A405E4B0411C52DEE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_8037154FA21C29FA6EB54B0411C63052" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementClassOfStockAxis_823981947F9B2A4A405E4B0411C52DEE" xlink:to="loc_us-gaap_ClassOfStockDomain_8037154FA21C29FA6EB54B0411C63052" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_37A3FE38D0DE0DA94CAD4B0411C62A61" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_8037154FA21C29FA6EB54B0411C63052" xlink:to="loc_us-gaap_CommonClassAMember_37A3FE38D0DE0DA94CAD4B0411C62A61" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_6279EB401BA7CC682E564B0411C651F5" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_8037154FA21C29FA6EB54B0411C63052" xlink:to="loc_us-gaap_CommonStockMember_6279EB401BA7CC682E564B0411C651F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_DEFF6F4A15298539476C4B0411C78623" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_3D4E2A751D5D822A92E44B0411C559EF" xlink:to="loc_us-gaap_StatementLineItems_DEFF6F4A15298539476C4B0411C78623" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DBA9777C84CBEC3772784B0411C77DD9" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_DEFF6F4A15298539476C4B0411C78623" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DBA9777C84CBEC3772784B0411C77DD9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DBA9777C84CBEC3772784B0411C77DD9" xlink:to="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_18B129CC00936075B7F54B0411C7F5B6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_18B129CC00936075B7F54B0411C7F5B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_561ADC49716F7702E57B4B0411C73D8F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_561ADC49716F7702E57B4B0411C73D8F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_BC458099937062DEAF854B0411C7D001" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_PreferredStockSharesIssued_BC458099937062DEAF854B0411C7D001" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_0BE1E343659AF0BB57AE4B0411C79BFD" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_0BE1E343659AF0BB57AE4B0411C79BFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_20D2A57531F82F6F1CE44B0411C7BF81" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_20D2A57531F82F6F1CE44B0411C7BF81" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_180E549CC9772D82F4D44B0411C8B581" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_180E549CC9772D82F4D44B0411C8B581" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_B084C488F1B978E56F654B0411C8DB83" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_CommonStockSharesIssued_B084C488F1B978E56F654B0411C8DB83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_FD3D63867263ADF2F5964B0411C8C13C" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_1CD11329FCF456B4CA3C4B0411C75346" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_FD3D63867263ADF2F5964B0411C8C13C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_08B1F0B57DD07011CDE4BE0400240639" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_A31FA2EE74ACC3DA4F46BE040024E882" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_08B1F0B57DD07011CDE4BE0400240639" xlink:to="loc_us-gaap_StatementTable_A31FA2EE74ACC3DA4F46BE040024E882" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_A583E1E0A784C145F87BBE040024EE1F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A31FA2EE74ACC3DA4F46BE040024E882" xlink:to="loc_us-gaap_StatementScenarioAxis_A583E1E0A784C145F87BBE040024EE1F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_B53FDAF927B8636D8703BE040024BECC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_A583E1E0A784C145F87BBE040024EE1F" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_B53FDAF927B8636D8703BE040024BECC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A31FA2EE74ACC3DA4F46BE040024E882" xlink:to="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DB1FDAEB4E5F93C57F25BE040024058B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DB1FDAEB4E5F93C57F25BE040024058B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_7B3CC2978DCE23619ECABE0400242F7B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DB1FDAEB4E5F93C57F25BE040024058B" xlink:to="loc_us-gaap_NetIncomeLoss_7B3CC2978DCE23619ECABE0400242F7B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DB1FDAEB4E5F93C57F25BE040024058B" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_92DCA8B6F1FD82AD519ABE0400240512" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_92DCA8B6F1FD82AD519ABE0400240512" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_592A0B639F20AD9BAAA5BE040024BF40" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_ShareBasedCompensation_592A0B639F20AD9BAAA5BE040024BF40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNoncashExpense" xlink:label="loc_us-gaap_OtherNoncashExpense_505529450AC56E7F967ABE040024173E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_OtherNoncashExpense_505529450AC56E7F967ABE040024173E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_940002EDFB9E8E6EBEC0BE0400246079" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_940002EDFB9E8E6EBEC0BE0400246079" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2CF1B5E9EE48452DBD71BE0400246366" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2CF1B5E9EE48452DBD71BE0400246366" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_7473812D7CFD91FD166EBE0400247FEB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_7473812D7CFD91FD166EBE0400247FEB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_89A844625C4321E0595CBE040024D2CD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_89A844625C4321E0595CBE040024D2CD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_282CDBE42F9E4D737770BE04002446E5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_282CDBE42F9E4D737770BE04002446E5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_88AA158B5244F1F4176BBE0400249617" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_88AA158B5244F1F4176BBE0400249617" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_A0788289836659F50DAFBE040024345D" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_533BEC17C5393E9B5F52BE04002428DE" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_A0788289836659F50DAFBE040024345D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_EB8AA22CCE284FD2B0FFBE0400240BFE" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_97CAF4BF0D308AF440AABE0400248789" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_EB8AA22CCE284FD2B0FFBE0400240BFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1B8C438843BA2ADFB88FBE04002423C1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_DB1FDAEB4E5F93C57F25BE040024058B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1B8C438843BA2ADFB88FBE04002423C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_528487443282C2F338D3BE04002468A9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_528487443282C2F338D3BE04002468A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_AA8240E2D15FDD54F9B3BE040024A41C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_AA8240E2D15FDD54F9B3BE040024A41C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_382D8EFAAEA80A683F90BE04002401DB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_382D8EFAAEA80A683F90BE04002401DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_DA624F5642776A3F3791BE0400244D33" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E8289D4C8602F616FDACBE040024ABE2" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_DA624F5642776A3F3791BE0400244D33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_001D32669DDBE189C66FBE0400240100" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:to="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_001D32669DDBE189C66FBE0400240100" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_E7D0D636DD4BEA7472ECBE0400248E5F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_E7D0D636DD4BEA7472ECBE0400248E5F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_54AD23ACB0F5D643C757BE040024C5B9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_54AD23ACB0F5D643C757BE040024C5B9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_9ED1017D8A88DA8B4650BE0400249BF7" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_9ED1017D8A88DA8B4650BE0400249BF7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_F6BE0A73FCEF554CE89DBE040024F276" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_BD106F6A0304BF7DF0E5BE040024D1A9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_F6BE0A73FCEF554CE89DBE040024F276" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_0FA060F0BBF25CFABF59BE040024351E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_0FA060F0BBF25CFABF59BE040024351E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_5E3EBBA7D48F36DE6442BE040024E847" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_5E3EBBA7D48F36DE6442BE040024E847" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_3E29111C1D8FA0F129FCBE04002492B4" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_F20133F6B0D4E6066410BE0400243F30" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_3E29111C1D8FA0F129FCBE04002492B4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F24A1D08B20E50D814CECE5A7FA9B12C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_9633D1C93E66F302398FCE5A7FA937C5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F24A1D08B20E50D814CECE5A7FA9B12C" xlink:to="loc_us-gaap_StatementTable_9633D1C93E66F302398FCE5A7FA937C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_5D3D7290690ED75E766DCE5A7FA97DDB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_9633D1C93E66F302398FCE5A7FA937C5" xlink:to="loc_us-gaap_StatementScenarioAxis_5D3D7290690ED75E766DCE5A7FA97DDB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_25894137414C5FF431AECE5A7FA9A5AF" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementScenarioAxis_5D3D7290690ED75E766DCE5A7FA97DDB" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_25894137414C5FF431AECE5A7FA9A5AF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_3A7B91F364D01DF085DECE5A7FA90200" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_9633D1C93E66F302398FCE5A7FA937C5" xlink:to="loc_us-gaap_StatementLineItems_3A7B91F364D01DF085DECE5A7FA90200" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3A7B91F364D01DF085DECE5A7FA90200" xlink:to="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_D61FE86E571101FCE03BCE5A7FB943C4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_D61FE86E571101FCE03BCE5A7FB943C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="loc_us-gaap_RevenueFromRelatedParties_42A6F6BF944047A24E98CE5A7FB947CD" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:to="loc_us-gaap_RevenueFromRelatedParties_42A6F6BF944047A24E98CE5A7FB947CD" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_OtherCollaborationRevenue" xlink:label="loc_regn_OtherCollaborationRevenue_434C492F43EAA6D54D78CE5A7FB9C9DC" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:to="loc_regn_OtherCollaborationRevenue_434C492F43EAA6D54D78CE5A7FB9C9DC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LicensesRevenue" xlink:label="loc_us-gaap_LicensesRevenue_56FA9CB38DD7CEE6AA44CE5A7FB98A5B" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:to="loc_us-gaap_LicensesRevenue_56FA9CB38DD7CEE6AA44CE5A7FB98A5B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_7503C42B9A8B6719AC86CE5A7FB9A620" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_703B33739656631F0EE3CE5A7FA955E8" xlink:to="loc_us-gaap_Revenues_7503C42B9A8B6719AC86CE5A7FB9A620" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_393C4469723B0F55D828CE5A7FB9EDBB" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_393C4469723B0F55D828CE5A7FB9EDBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_0B6B6C594F7EAC46AC86CE5A7FB98469" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_0B6B6C594F7EAC46AC86CE5A7FB98469" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_us-gaap_CostOfGoodsSold_2D2332E6DFAAC0A1106ACE5A7FB90062" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:to="loc_us-gaap_CostOfGoodsSold_2D2332E6DFAAC0A1106ACE5A7FB90062" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Costofmanufacturing" xlink:label="loc_regn_Costofmanufacturing_38B78C854E9F71A9F39FCE5A7FB9A902" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:to="loc_regn_Costofmanufacturing_38B78C854E9F71A9F39FCE5A7FB9A902" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_684FF52D918AC2C093C4CE5A7FB9B203" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_8BC227AEF4DA147FE119CE5A7FB99A7A" xlink:to="loc_us-gaap_CostsAndExpenses_684FF52D918AC2C093C4CE5A7FB9B203" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_DEDD45A9794B84F7D846CE5A7FB93046" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_OperatingIncomeLoss_DEDD45A9794B84F7D846CE5A7FB93046" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_AC4E86EF9D8C7CAFA0F0CE5A7FB92907" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_AC4E86EF9D8C7CAFA0F0CE5A7FB92907" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="loc_us-gaap_InvestmentIncomeNonoperating_FCD74F9C1EA869C4A198CE5A7FB9EC59" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_AC4E86EF9D8C7CAFA0F0CE5A7FB92907" xlink:to="loc_us-gaap_InvestmentIncomeNonoperating_FCD74F9C1EA869C4A198CE5A7FB9EC59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_1D8C73594FD027F50029CE5A7FB9848C" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_AC4E86EF9D8C7CAFA0F0CE5A7FB92907" xlink:to="loc_us-gaap_InterestExpense_1D8C73594FD027F50029CE5A7FB9848C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_F0D872A0C13A379C91DFCE5A7FB9B978" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_AC4E86EF9D8C7CAFA0F0CE5A7FB92907" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_F0D872A0C13A379C91DFCE5A7FB9B978" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_827CEC2A83F1926D1798CE5A7FB9DBC8" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_827CEC2A83F1926D1798CE5A7FB9DBC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_16CC336E91407A24B96BCE5A7FB947B6" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_16CC336E91407A24B96BCE5A7FB947B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A447E894CBBA06D46912CE5A7FB9162D" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_NetIncomeLoss_A447E894CBBA06D46912CE5A7FB9162D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_2580E962957064DBF47FCE5A7FB9A882" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_EarningsPerShareBasic_2580E962957064DBF47FCE5A7FB9A882" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_886528B0515D93E709C1CE5A7FB9EE05" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_EarningsPerShareDiluted_886528B0515D93E709C1CE5A7FB9EE05" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8776ECB502A04802A257CE5A7FB9E0B1" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8776ECB502A04802A257CE5A7FB9E0B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_95F8919426A9BAF76A03CE5A7FB90A6C" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_6BA526DA5C344264DD37CE5A7FA9F40C" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_95F8919426A9BAF76A03CE5A7FB90A6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_821D7D05D6DB10667D3ACE5A7FB93F10" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3A7B91F364D01DF085DECE5A7FA90200" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_821D7D05D6DB10667D3ACE5A7FB93F10" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_612C46200FB6C304D552CE5A7FB91F56" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_821D7D05D6DB10667D3ACE5A7FB93F10" xlink:to="loc_us-gaap_NetIncomeLoss_612C46200FB6C304D552CE5A7FB91F56" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_5B6699412CB410CC9B2FCE5A7FB9F79E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_821D7D05D6DB10667D3ACE5A7FB93F10" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_5B6699412CB410CC9B2FCE5A7FB9F79E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_802B5C25E4C5E0C14282CE5A7FB98D1D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_5B6699412CB410CC9B2FCE5A7FB9F79E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_802B5C25E4C5E0C14282CE5A7FB98D1D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_9530D457631E82C1422ACE5A7FB9665C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_821D7D05D6DB10667D3ACE5A7FB93F10" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_9530D457631E82C1422ACE5A7FB9665C" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_FCDD762081DEAD7921FDA9D7C15BCB23" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_A39AD233C298B8E206F2A9D7C15BA935" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_FCDD762081DEAD7921FDA9D7C15BCB23" xlink:to="loc_us-gaap_StatementTable_A39AD233C298B8E206F2A9D7C15BA935" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_A99D7CA7CD088DE83BA3A9D7C15B52A2" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A39AD233C298B8E206F2A9D7C15BA935" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_A99D7CA7CD088DE83BA3A9D7C15B52A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_A99D7CA7CD088DE83BA3A9D7C15B52A2" xlink:to="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_6D9644ADD0C6A262204AA9D7C15BD802" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:to="loc_us-gaap_CommonClassAMember_6D9644ADD0C6A262204AA9D7C15BD802" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_25190CE6894149534FBAA9D7C15BB687" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:to="loc_us-gaap_CommonStockMember_25190CE6894149534FBAA9D7C15BB687" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_9E55FFFBDB00930310EFA9D7C15B4598" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_9E55FFFBDB00930310EFA9D7C15B4598" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_252C75816B560D192E50A9D7C15B715C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:to="loc_us-gaap_RetainedEarningsMember_252C75816B560D192E50A9D7C15B715C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D6CAB11F2F5A5409371BA9D7C16B89B3" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_9D843887EEBD3265C74BA9D7C15B5A78" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_D6CAB11F2F5A5409371BA9D7C16B89B3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_15BE03FF4B52D8BA252BA9D7C16B7279" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A39AD233C298B8E206F2A9D7C15BA935" xlink:to="loc_us-gaap_StatementLineItems_15BE03FF4B52D8BA252BA9D7C16B7279" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_15BE03FF4B52D8BA252BA9D7C16B7279" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0A5E0FEDFA5B59140DAAA9D7C16B878A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockholdersEquity_0A5E0FEDFA5B59140DAAA9D7C16B878A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_BBA0A7E79C4EF6F5C118A9D7C16B1908" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_SharesOutstanding_BBA0A7E79C4EF6F5C118A9D7C16B1908" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_07E21F59D8BF8B4D48EAA9D7C16B186B" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_07E21F59D8BF8B4D48EAA9D7C16B186B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9D8F3BAA69D739BC9E02A9D7C16BF404" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9D8F3BAA69D739BC9E02A9D7C16BF404" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_76F00DE3550F649E6C40A9D7C16BB6DB" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_76F00DE3550F649E6C40A9D7C16BB6DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F7D42C9361AB95BD9CB4A9D7C16BBBB6" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F7D42C9361AB95BD9CB4A9D7C16BBBB6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_D377E67E550A2CE481B7A9D7C16BCE17" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_D377E67E550A2CE481B7A9D7C16BCE17" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_149CEFA808764A332162A9D7C16BFF4C" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_149CEFA808764A332162A9D7C16BFF4C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_2B23EAB92643DF38EFD2A9D7C16B1724" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_2B23EAB92643DF38EFD2A9D7C16B1724" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2DECA46E95600F36FE22A9D7C16B15AA" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2DECA46E95600F36FE22A9D7C16B15AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:label="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_04B41C2B16011369180EA9D7C16B8C7F" xlink:type="locator" />
    <presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_04B41C2B16011369180EA9D7C16B8C7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_BD685D3EDE5520230F19A9D7C16B0EDA" xlink:type="locator" />
    <presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_NetIncomeLoss_BD685D3EDE5520230F19A9D7C16B0EDA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_0C7AC230209344C4BCC2A9D7C16BB0F3" xlink:type="locator" />
    <presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_0C7AC230209344C4BCC2A9D7C16BB0F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0AC7B0BE9129A7603EC9A9D7C16B77BB" xlink:type="locator" />
    <presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_StockholdersEquity_0AC7B0BE9129A7603EC9A9D7C16B77BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_1B5F36EED6C2CE0D5501A9D7C16B55F1" xlink:type="locator" />
    <presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_A451B74C3A08EE0EF7E1A9D7C16B3D64" xlink:to="loc_us-gaap_SharesOutstanding_1B5F36EED6C2CE0D5501A9D7C16B55F1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <loc xlink:href="regn-20140331.xsd#regn_DocumentAndEntityInformationAbstract" xlink:label="loc_regn_DocumentAndEntityInformationAbstract_E69C0437C88AF673EA2DA88083C36C60" xlink:type="locator" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_4467E700ABD07B48DDE4A88083C34711" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_DocumentAndEntityInformationAbstract_E69C0437C88AF673EA2DA88083C36C60" xlink:to="loc_dei_EntitiesTable_4467E700ABD07B48DDE4A88083C34711" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_51549BD78D8497DEE4D9A88083C3141D" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_4467E700ABD07B48DDE4A88083C34711" xlink:to="loc_us-gaap_StatementClassOfStockAxis_51549BD78D8497DEE4D9A88083C3141D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_4C92DD598E0B46C4472CA88083C36459" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementClassOfStockAxis_51549BD78D8497DEE4D9A88083C3141D" xlink:to="loc_us-gaap_ClassOfStockDomain_4C92DD598E0B46C4472CA88083C36459" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_3ED1F950C24A283AE636A88083C323AA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_4C92DD598E0B46C4472CA88083C36459" xlink:to="loc_us-gaap_CommonStockMember_3ED1F950C24A283AE636A88083C323AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_DA3EBE22A04B75A647AAA88083C357C3" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_4C92DD598E0B46C4472CA88083C36459" xlink:to="loc_us-gaap_CommonClassAMember_DA3EBE22A04B75A647AAA88083C357C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityInformationLineItems" xlink:label="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_4467E700ABD07B48DDE4A88083C34711" xlink:to="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_0D14F6EFBB8AF76025C7A88083C3F086" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_EntityRegistrantName_0D14F6EFBB8AF76025C7A88083C3F086" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_A8BDC501F340DC08CA6CA88083C3C6E8" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_EntityCentralIndexKey_A8BDC501F340DC08CA6CA88083C3C6E8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_ECEB1B5C044475F7DECCA88083C308E1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_CurrentFiscalYearEndDate_ECEB1B5C044475F7DECCA88083C308E1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_59DDB5F7A140A32B7A9EA88083C32D9A" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_EntityFilerCategory_59DDB5F7A140A32B7A9EA88083C32D9A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_87C6ADF33D1B12C9FE8DA88083C3C6C6" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_DocumentType_87C6ADF33D1B12C9FE8DA88083C3C6C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_295AEDD8EBA8FDB2C48BA88083C3F2A1" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_DocumentPeriodEndDate_295AEDD8EBA8FDB2C48BA88083C3F2A1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_4698E9439B0148CE6990A88083C3F1A3" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_DocumentFiscalYearFocus_4698E9439B0148CE6990A88083C3F1A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_A20CB3E64D7827B50557A88083C3DBDB" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_DocumentFiscalPeriodFocus_A20CB3E64D7827B50557A88083C3DBDB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_8303855DB5E87A0FDA28A88083C374B2" xlink:type="locator" />
    <presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_AmendmentFlag_8303855DB5E87A0FDA28A88083C374B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_ADB8F3C5D7118F0E041DA88083C39483" xlink:type="locator" />
    <presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_1C42D1973D1A3142AE82A88083C3D9D3" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_ADB8F3C5D7118F0E041DA88083C39483" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/FairValueMeasurements" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_566D31D63D43C4CAFE0E4B0411ED7C2D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_F908568318060C869F764B0411ED13AD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_566D31D63D43C4CAFE0E4B0411ED7C2D" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_F908568318060C869F764B0411ED13AD" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_087525971E93106C966CB7F49D168189" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_087525971E93106C966CB7F49D168189" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_96E9FF5DA171EF6860FEB7F49D16EA2F" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_96E9FF5DA171EF6860FEB7F49D16EA2F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_04BEB23D176461983A8DB7F49D164BC8" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_96E9FF5DA171EF6860FEB7F49D16EA2F" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_04BEB23D176461983A8DB7F49D164BC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_859D5D654FAAE766B1A9B7F49D162437" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_04BEB23D176461983A8DB7F49D164BC8" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_859D5D654FAAE766B1A9B7F49D162437" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_33E7974A45AEF542C744B7F49D16102B" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_33E7974A45AEF542C744B7F49D16102B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1D451505921E944C8042B7F49D16712C" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_33E7974A45AEF542C744B7F49D16102B" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1D451505921E944C8042B7F49D16712C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_8C91EA44A4B12B010238B7F49D1668D4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1D451505921E944C8042B7F49D16712C" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_8C91EA44A4B12B010238B7F49D1668D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_DEEB178EC72600A6DF64B7F49D160606" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1D451505921E944C8042B7F49D16712C" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_DEEB178EC72600A6DF64B7F49D160606" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_82CDA88E5ADD883BE2F8B7F49D16E304" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1D451505921E944C8042B7F49D16712C" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_82CDA88E5ADD883BE2F8B7F49D16E304" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_FEEB5BBC5FF15BBB82A2B7F49D16A47E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_FEEB5BBC5FF15BBB82A2B7F49D16A47E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_72EB173F380848A75083B7F49D16D576" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_FEEB5BBC5FF15BBB82A2B7F49D16A47E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_72EB173F380848A75083B7F49D16D576" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConvertibleDebtMember" xlink:label="loc_us-gaap_ConvertibleDebtMember_F068BCE42C2C5B9F8A15B7F49D169E32" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_72EB173F380848A75083B7F49D16D576" xlink:to="loc_us-gaap_ConvertibleDebtMember_F068BCE42C2C5B9F8A15B7F49D169E32" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0F15071F1D04924F7BBDB7F49D168837" xlink:type="locator" />
    <presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_FFC8CA776B5B7C33D442B7F49D16BC9F" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0F15071F1D04924F7BBDB7F49D168837" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="loc_us-gaap_ImpairmentOfInvestments_2C4CB9FD4E5DC1908966B7F49D168233" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0F15071F1D04924F7BBDB7F49D168837" xlink:to="loc_us-gaap_ImpairmentOfInvestments_2C4CB9FD4E5DC1908966B7F49D168233" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0F15071F1D04924F7BBDB7F49D168837" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_USGovernmentObligationsFairValueDisclosure" xlink:label="loc_regn_USGovernmentObligationsFairValueDisclosure_7D3C7576E45ECE655BD8B7F49D16BB36" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_regn_USGovernmentObligationsFairValueDisclosure_7D3C7576E45ECE655BD8B7F49D16BB36" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_CorporateBondsFairValueDisclosure" xlink:label="loc_regn_CorporateBondsFairValueDisclosure_1FC1B97FAEF7F136F25BB84ED03D5515" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_regn_CorporateBondsFairValueDisclosure_1FC1B97FAEF7F136F25BB84ED03D5515" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommercialPaperAtCarryingValue" xlink:label="loc_us-gaap_CommercialPaperAtCarryingValue_FE765E64BE5BEE6265B7B843F9FA7781" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_us-gaap_CommercialPaperAtCarryingValue_FE765E64BE5BEE6265B7B843F9FA7781" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_MunicipalBondsFairValueDisclosure" xlink:label="loc_regn_MunicipalBondsFairValueDisclosure_2A8C96D22A94E09185A1B7F49D16E31E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_regn_MunicipalBondsFairValueDisclosure_2A8C96D22A94E09185A1B7F49D16E31E" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_InternationalGovernmentObligationsFairValueDisclosure" xlink:label="loc_regn_InternationalGovernmentObligationsFairValueDisclosure_936957FF2AC145F4197CB7F49D162530" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_regn_InternationalGovernmentObligationsFairValueDisclosure_936957FF2AC145F4197CB7F49D162530" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositAtCarryingValue" xlink:label="loc_us-gaap_CertificatesOfDepositAtCarryingValue_D6D21B779F51EE6E11BDB7F49D16DEA8" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_us-gaap_CertificatesOfDepositAtCarryingValue_D6D21B779F51EE6E11BDB7F49D16DEA8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_4865468974D53E6B56C4B854B8D6B92B" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_4865468974D53E6B56C4B854B8D6B92B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_F1D15D6BA7A70B7946E3B7F49D160FF1" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_6141E6EA14DDE71D3475B7F49D16DAED" xlink:to="loc_us-gaap_AvailableForSaleSecurities_F1D15D6BA7A70B7946E3B7F49D160FF1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract" xlink:label="loc_us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_43028DB903ECE0BD6020B7F49D16D90E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0F15071F1D04924F7BBDB7F49D168837" xlink:to="loc_us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_43028DB903ECE0BD6020B7F49D16D90E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_09ECE1901EAC2996B513B7F49D16B379" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_43028DB903ECE0BD6020B7F49D16D90E" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_09ECE1901EAC2996B513B7F49D16B379" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7813D4072C1134722FA5B7F49D160158" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_43028DB903ECE0BD6020B7F49D16D90E" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7813D4072C1134722FA5B7F49D160158" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConvertibleDebtFairValueDisclosures" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_8DCAA7F34E4A7F642274B7F49D16F2F1" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermConvertibleDebtCurrentAndNoncurrentAbstract_43028DB903ECE0BD6020B7F49D16D90E" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_8DCAA7F34E4A7F642274B7F49D16F2F1" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/FairValueMeasurementsTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_27AA3A56E54B1F1532884B04134400DC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_6CBD32562426A4FFADD74B0413441232" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_27AA3A56E54B1F1532884B04134400DC" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_6CBD32562426A4FFADD74B0413441232" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/IncomeTaxes" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_D0B8F97E1554D4853C6E4B04135EB617" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_4BD8CBB7E02407B63E374B04135ECAA4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_D0B8F97E1554D4853C6E4B04135EB617" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_4BD8CBB7E02407B63E374B04135ECAA4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/IncomeTaxesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_2FA9C489DC0D22A477FAD6A7E7C5BE2E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:to="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_2FA9C489DC0D22A477FAD6A7E7C5BE2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_44F2533844CC8B5163E5D6A7E7C59E9B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_2FA9C489DC0D22A477FAD6A7E7C5BE2E" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_44F2533844CC8B5163E5D6A7E7C59E9B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_B8F62FE532A58DDFE645D6A7E7C5854E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_2FA9C489DC0D22A477FAD6A7E7C5BE2E" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_B8F62FE532A58DDFE645D6A7E7C5854E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3354E32B99E4AB016F70D6A7E7C59480" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_B8F62FE532A58DDFE645D6A7E7C5854E" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3354E32B99E4AB016F70D6A7E7C59480" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_D23B02E9F11CD826E6C3D6A7E7C5AC74" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_2FA9C489DC0D22A477FAD6A7E7C5BE2E" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_D23B02E9F11CD826E6C3D6A7E7C5AC74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BB786BCF1E7CD1292AB3D6A7E7C59841" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BB786BCF1E7CD1292AB3D6A7E7C59841" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_DB8504DFF4C4E7E1DA17D6A7E7C598C0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BB786BCF1E7CD1292AB3D6A7E7C59841" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_DB8504DFF4C4E7E1DA17D6A7E7C598C0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_77D81FA6FC26AE939BEBD6A7E7C56160" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BB786BCF1E7CD1292AB3D6A7E7C59841" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_77D81FA6FC26AE939BEBD6A7E7C56160" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_BD814E75AE076C2F1B10D6A7E7C52C6C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_BB786BCF1E7CD1292AB3D6A7E7C59841" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_BD814E75AE076C2F1B10D6A7E7C52C6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_2CD668D112B7D86F6255D6A7E7C57551" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_2CD668D112B7D86F6255D6A7E7C57551" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_BD617C51A3205736C249D6A7E7C59766" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_2CD668D112B7D86F6255D6A7E7C57551" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_BD617C51A3205736C249D6A7E7C59766" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_81BFF1B50E2A0F5795EBD6A7E7C5C08A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_2CD668D112B7D86F6255D6A7E7C57551" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_81BFF1B50E2A0F5795EBD6A7E7C5C08A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_2517C5D9E088EB8A228AD6A7E7C5667C" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_2517C5D9E088EB8A228AD6A7E7C5667C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_EDB2892888DD5AC65C36D6A7E7C55364" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_2517C5D9E088EB8A228AD6A7E7C5667C" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_EDB2892888DD5AC65C36D6A7E7C55364" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_4C4C3803F523C3FCE8B8D6A7E7C52C0F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_EDB2892888DD5AC65C36D6A7E7C55364" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_4C4C3803F523C3FCE8B8D6A7E7C52C0F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_389DF9516F12B1155890D6A7E7C5230F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_2517C5D9E088EB8A228AD6A7E7C5667C" xlink:to="loc_us-gaap_OperatingLossCarryforwardsLineItems_389DF9516F12B1155890D6A7E7C5230F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_D909182F5B4F57122854D6A7E7C5834B" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_389DF9516F12B1155890D6A7E7C5230F" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_D909182F5B4F57122854D6A7E7C5834B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7CDBA41A460C42BA4487D6A7E7C5EC02" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_59F4A3181E8C242BC691D6A7E7C5CFC3" xlink:to="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_7CDBA41A460C42BA4487D6A7E7C5EC02" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/IncomeTaxesTables" xlink:type="extended" />
  <presentationLink xlink:role="http://www.regeneron.com/role/InterimFinancialStatements" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_C1FE33F2F08FB36A9D6EA9D48902B643" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BDC96CABE9D47EC05416A9D48902276A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_C1FE33F2F08FB36A9D6EA9D48902B643" xlink:to="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BDC96CABE9D47EC05416A9D48902276A" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/Inventory" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_5DF957AFBD93102F17BB4B0412B7CDAE" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_71FD4843C61FCC5C6C904B0412B7FECA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_5DF957AFBD93102F17BB4B0412B7CDAE" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_71FD4843C61FCC5C6C904B0412B7FECA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/InventoryDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_BFA2E42BE0E269F51F3E4B0412A66832" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_BFA2E42BE0E269F51F3E4B0412A66832" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_0A867C21227DD60F10B04B0412A6F41F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_0A867C21227DD60F10B04B0412A6F41F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_0F29BF8609838209BA3E4B0412A68970" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_0F29BF8609838209BA3E4B0412A68970" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherInventoryNetOfReserves" xlink:label="loc_us-gaap_OtherInventoryNetOfReserves_03E487071655DE93E2464B0412A6EE77" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_OtherInventoryNetOfReserves_03E487071655DE93E2464B0412A6EE77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_ACFF02FBE0AB134F2C384B0412A6C1C5" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_InventoryNet_ACFF02FBE0AB134F2C384B0412A6C1C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="loc_us-gaap_InventoryWriteDown_D34ACB0066D299B68F414B0412A67E68" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_0051974D802A8B81D9024B0412A63A5E" xlink:to="loc_us-gaap_InventoryWriteDown_D34ACB0066D299B68F414B0412A67E68" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/InventoryTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_08F2A6102735AEFC04034B0411BC5A07" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_8428647FB6C6677818A44B0411BC3861" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_08F2A6102735AEFC04034B0411BC5A07" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_8428647FB6C6677818A44B0411BC3861" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/LegalMatters" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B1A5B085D64A343032294B0412848323" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LegalMattersAndContingenciesTextBlock" xlink:label="loc_us-gaap_LegalMattersAndContingenciesTextBlock_6E25440009C97AFBEEB94B041284B0C4" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B1A5B085D64A343032294B0412848323" xlink:to="loc_us-gaap_LegalMattersAndContingenciesTextBlock_6E25440009C97AFBEEB94B041284B0C4" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/LegalMattersDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_BEC74890A3E760D1E64AA88082D878F0" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_BEC74890A3E760D1E64AA88082D878F0" xlink:to="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationStatusAxis" xlink:label="loc_us-gaap_LitigationStatusAxis_6FCDB9282C86A5C1E148A88082D8DF87" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:to="loc_us-gaap_LitigationStatusAxis_6FCDB9282C86A5C1E148A88082D8DF87" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_6B05F8394C44097B3CA4A88082D8630F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LitigationStatusAxis_6FCDB9282C86A5C1E148A88082D8DF87" xlink:to="loc_us-gaap_LitigationStatusDomain_6B05F8394C44097B3CA4A88082D8630F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="loc_us-gaap_LitigationCaseAxis_E918A3CDAF50E8FA4B30A88082D84DBB" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:to="loc_us-gaap_LitigationCaseAxis_E918A3CDAF50E8FA4B30A88082D84DBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_899783AE1B94595790B0A88082D81C3F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LitigationCaseAxis_E918A3CDAF50E8FA4B30A88082D84DBB" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_899783AE1B94595790B0A88082D81C3F" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_LossContingenciesByGeographicAreaAxis" xlink:label="loc_regn_LossContingenciesByGeographicAreaAxis_70D86D13071EFCF777C9A88082D88BA4" xlink:type="locator" />
    <presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:to="loc_regn_LossContingenciesByGeographicAreaAxis_70D86D13071EFCF777C9A88082D88BA4" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_LossContingenciesByGeographicAreaDomain" xlink:label="loc_regn_LossContingenciesByGeographicAreaDomain_1E0C8C85CDEE7BD2DA37A88082D8EC82" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_LossContingenciesByGeographicAreaAxis_70D86D13071EFCF777C9A88082D88BA4" xlink:to="loc_regn_LossContingenciesByGeographicAreaDomain_1E0C8C85CDEE7BD2DA37A88082D8EC82" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_3DB6FE64C01F2D167098A88082D8E6E0" xlink:type="locator" />
    <presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesTable_3AAA7B5B363B688B0F68A88082D85530" xlink:to="loc_us-gaap_LossContingenciesLineItems_3DB6FE64C01F2D167098A88082D8E6E0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/LegalMattersPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B02089AC44DEDD30E298A98B107A1A76" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LegalCostsPolicyTextBlock" xlink:label="loc_us-gaap_LegalCostsPolicyTextBlock_9BCEA3EBA5A7059DC446A88082D8738E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B02089AC44DEDD30E298A98B107A1A76" xlink:to="loc_us-gaap_LegalCostsPolicyTextBlock_9BCEA3EBA5A7059DC446A88082D8738E" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/MarketableSecurities" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_7AA4CF4094E85C737D45A88083845BF4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesPolicy" xlink:label="loc_us-gaap_MarketableSecuritiesPolicy_B72DA0C9D24E5907705CA9A64EC45197" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_7AA4CF4094E85C737D45A88083845BF4" xlink:to="loc_us-gaap_MarketableSecuritiesPolicy_B72DA0C9D24E5907705CA9A64EC45197" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/MarketableSecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_BB53B5F7C78914AC7ED7B7F49D35F3E8" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_13C796E2E0FE58339878B7F49D35E3F7" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_BB53B5F7C78914AC7ED7B7F49D35F3E8" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_13C796E2E0FE58339878B7F49D35E3F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A0D903D5AA9ADCC12B8CB7F49D35F1E6" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_13C796E2E0FE58339878B7F49D35E3F7" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A0D903D5AA9ADCC12B8CB7F49D35F1E6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_A0D903D5AA9ADCC12B8CB7F49D35F1E6" xlink:to="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_911118611BED8999D73DB7F49D35F3D5" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_911118611BED8999D73DB7F49D35F3D5" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_USGovernmentGuaranteedCorporateBondsMember" xlink:label="loc_regn_USGovernmentGuaranteedCorporateBondsMember_D5BA31F1CF732B8D8434B7F49D35990A" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_regn_USGovernmentGuaranteedCorporateBondsMember_D5BA31F1CF732B8D8434B7F49D35990A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_7F2F6A83B13F34BBDA0FB7F49D35E866" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_us-gaap_CommercialPaperMember_7F2F6A83B13F34BBDA0FB7F49D35E866" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="loc_us-gaap_MunicipalBondsMember_89165673552877F4B021B7F49D35B8E9" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_us-gaap_MunicipalBondsMember_89165673552877F4B021B7F49D35B8E9" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_InternationalgovernmentagencyobligationsMember" xlink:label="loc_regn_InternationalgovernmentagencyobligationsMember_3A9A53F29741DF858D7DB7F49D354CE9" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_regn_InternationalgovernmentagencyobligationsMember_3A9A53F29741DF858D7DB7F49D354CE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_6FA6FC493E00F38038E6B7F49D352193" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_us-gaap_CertificatesOfDepositMember_6FA6FC493E00F38038E6B7F49D352193" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_0844A1A20FC8982F3BDEB7F49D35D8B6" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_038F4E5CF4C750492835B7F49D352C78" xlink:to="loc_us-gaap_EquitySecuritiesMember_0844A1A20FC8982F3BDEB7F49D35D8B6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_13C796E2E0FE58339878B7F49D35E3F7" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="loc_us-gaap_ImpairmentOfInvestments_04FE665082A429130C31B7F49D3548DD" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_ImpairmentOfInvestments_04FE665082A429130C31B7F49D3548DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_9FA6956C9964B8DB3213B7F49D351A28" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_9FA6956C9964B8DB3213B7F49D351A28" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains_6B6D79D04473CEA9EF13B7F49D3572F3" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains_6B6D79D04473CEA9EF13B7F49D3572F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss_798D241AC795BC950C38B7F49D35A9D5" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss_798D241AC795BC950C38B7F49D35A9D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_2FCD410B7DA6B4815114B7F49D35C2DF" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecurities_2FCD410B7DA6B4815114B7F49D35C2DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_2866BC14F180951130E0B7F49D3535F7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_2866BC14F180951130E0B7F49D3535F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_21D103CC2F31D27CB03EB7F49D354D63" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_21D103CC2F31D27CB03EB7F49D354D63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_68C4353174EEE8AB555AB7F49D35BB55" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_68C4353174EEE8AB555AB7F49D35BB55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_2E66CF6930A3CBB575E2B7F49D35B949" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_2E66CF6930A3CBB575E2B7F49D35B949" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_03862C215D0497F07BA1B7F49D3541B7" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract_E0CB9A137FE48D419895B7F49D354667" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_03862C215D0497F07BA1B7F49D3541B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_B81CA64AA348421A8349B7F49D35DB39" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_B81CA64AA348421A8349B7F49D35DB39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_637311CD8E9620A92F9AB7F49D35AEB1" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_B81CA64AA348421A8349B7F49D35DB39" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_637311CD8E9620A92F9AB7F49D35AEB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_AD90844976E31382A260B7F49D35FFB6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_B81CA64AA348421A8349B7F49D35DB39" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_AD90844976E31382A260B7F49D35FFB6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_C749E3A6B84248CE7B5BB7F49D3513C9" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_B81CA64AA348421A8349B7F49D35DB39" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_C749E3A6B84248CE7B5BB7F49D3513C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract_AAD6B38CFB043ED41974B7F49D4468A2" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_CC31ED3B8DD23BB5B7D1B7F49D35ABDE" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract_AAD6B38CFB043ED41974B7F49D4468A2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses_419CE761F99D3A4AFAB9B7F49D44B523" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract_AAD6B38CFB043ED41974B7F49D4468A2" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses_419CE761F99D3A4AFAB9B7F49D44B523" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses_42062EC1049704397C2AB7F49D44C57F" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract_AAD6B38CFB043ED41974B7F49D4468A2" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses_42062EC1049704397C2AB7F49D44C57F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses_F09F62D3FDF235A3D5D9B7F49D44A539" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAbstract_AAD6B38CFB043ED41974B7F49D4468A2" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses_F09F62D3FDF235A3D5D9B7F49D44A539" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/MarketableSecuritiesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_8F20E2D708E7CCA8236A4B04132C8DE2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesTextBlock" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_9AAECD66AB56CC7B68A84B04132CEE82" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_8F20E2D708E7CCA8236A4B04132C8DE2" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_9AAECD66AB56CC7B68A84B04132CEE82" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_093346A59C55A43396764B04132C9248" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_8F20E2D708E7CCA8236A4B04132C8DE2" xlink:to="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_093346A59C55A43396764B04132C9248" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_7486B68C8C64D74333774B04132C1C84" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_8F20E2D708E7CCA8236A4B04132C8DE2" xlink:to="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_7486B68C8C64D74333774B04132C1C84" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetIncomePerShare" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_6633B199B8A9FDBD4D4DA9D4D91759CB" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_EA75FDC269D23CD2721BA9D4D917A5A0" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_6633B199B8A9FDBD4D4DA9D4D91759CB" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_EA75FDC269D23CD2721BA9D4D917A5A0" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetIncomePerShareDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_AE11D9C3D2D46333565FBA4F8017857A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:to="loc_us-gaap_NetIncomeLoss_AE11D9C3D2D46333565FBA4F8017857A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DilutiveSecuritiesAbstract" xlink:label="loc_us-gaap_DilutiveSecuritiesAbstract_5583A93EC8EAF64E0DA0BA4F8017CF71" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:to="loc_us-gaap_DilutiveSecuritiesAbstract_5583A93EC8EAF64E0DA0BA4F8017CF71" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_3A6F9B0F5D7668A60847BA4F8017FB6C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_3A6F9B0F5D7668A60847BA4F8017FB6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_A25AC2B3F8273806A1F2BA4F80179B3E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_3A6F9B0F5D7668A60847BA4F8017FB6C" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_A25AC2B3F8273806A1F2BA4F80179B3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_3A6F9B0F5D7668A60847BA4F8017FB6C" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_D0EA08C1BC7B08BAEE1DBA4F8017407D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_D0EA08C1BC7B08BAEE1DBA4F8017407D" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_IncrementalCommonSharesAttributableToNonvestedRestrictedShares" xlink:label="loc_regn_IncrementalCommonSharesAttributableToNonvestedRestrictedShares_8222F804227550676F68BA4F80177481" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:to="loc_regn_IncrementalCommonSharesAttributableToNonvestedRestrictedShares_8222F804227550676F68BA4F80177481" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_E1D18C3F015074B4133ABA4F801753D5" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_E1D18C3F015074B4133ABA4F801753D5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B6187AA7C4AC069B499CBA4F8017F572" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustmentAbstract_F1BBC91414EA9B583410BA4F80170A3E" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B6187AA7C4AC069B499CBA4F8017F572" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_A56BEF4B8080456CBEB7BA4F8017E72E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_3A6F9B0F5D7668A60847BA4F8017FB6C" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_A56BEF4B8080456CBEB7BA4F8017E72E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_4F89435B3C51EDF12C87BA4F80177F43" xlink:type="locator" />
    <presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_4F89435B3C51EDF12C87BA4F80177F43" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_51B8F474BA4488CE1C88BA4F80175D03" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_4F89435B3C51EDF12C87BA4F80177F43" xlink:to="loc_us-gaap_EarningsPerShareBasic_51B8F474BA4488CE1C88BA4F80175D03" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_C6F4A3120EDAE9840CECBA4F8017C82B" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_4F89435B3C51EDF12C87BA4F80177F43" xlink:to="loc_us-gaap_EarningsPerShareDiluted_C6F4A3120EDAE9840CECBA4F8017C82B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_AADC8377F3C51694CE76BA4F8017F2DE" xlink:type="locator" />
    <presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_A46A8BD8E7E68C3DBAC2BA4F8017FFE6" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_AADC8377F3C51694CE76BA4F8017F2DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_40EE81FBA4E9C189B4C7BA4F8017A2F3" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_AADC8377F3C51694CE76BA4F8017F2DE" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_40EE81FBA4E9C189B4C7BA4F8017A2F3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1530F7051212348E77DEBA4F8017AABC" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_40EE81FBA4E9C189B4C7BA4F8017A2F3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1530F7051212348E77DEBA4F8017AABC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_133054D0332727ECD322BA4F8017DF3E" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1530F7051212348E77DEBA4F8017AABC" xlink:to="loc_us-gaap_EmployeeStockOptionMember_133054D0332727ECD322BA4F8017DF3E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConvertibleDebtSecuritiesMember" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_7A055A4D227E57544C8FBA4F80174053" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_1530F7051212348E77DEBA4F8017AABC" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_7A055A4D227E57544C8FBA4F80174053" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_66C6F0EDC6B908C6CC43BA4F80176620" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_AADC8377F3C51694CE76BA4F8017F2DE" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_66C6F0EDC6B908C6CC43BA4F80176620" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_5A70E3AD36E09E691CC1BA4F80172C38" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_66C6F0EDC6B908C6CC43BA4F80176620" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_5A70E3AD36E09E691CC1BA4F80172C38" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetIncomePerShareTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_5009A2E5AE0FC67F1B3EA9D4D8D87F1C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_165875A88E08C6DEBD4EA9D4D8D89474" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_5009A2E5AE0FC67F1B3EA9D4D8D87F1C" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_165875A88E08C6DEBD4EA9D4D8D89474" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_243821959895744DD01AA9D4D8D81DD6" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_5009A2E5AE0FC67F1B3EA9D4D8D87F1C" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_243821959895744DD01AA9D4D8D81DD6" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetProductSales" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_771589EAF83F4854BC3E8FA525A0B9BC" xlink:type="locator" />
    <loc xlink:href="regn-20140331.xsd#regn_RevenueAndConcentrationRiskDisclosureTextBlock" xlink:label="loc_regn_RevenueAndConcentrationRiskDisclosureTextBlock_9487BB6B4581442F3BFA8FA525A085AA" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_771589EAF83F4854BC3E8FA525A0B9BC" xlink:to="loc_regn_RevenueAndConcentrationRiskDisclosureTextBlock_9487BB6B4581442F3BFA8FA525A085AA" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetProductSalesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_F45059140DAC321EF7CBADE52B3ACA29" xlink:type="locator" />
    <loc xlink:href="regn-20140331.xsd#regn_RevenueDisclosureTable" xlink:label="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_F45059140DAC321EF7CBADE52B3ACA29" xlink:to="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_47B333088271A7BCB038ADE52B3A9923" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:to="loc_us-gaap_ProductOrServiceAxis_47B333088271A7BCB038ADE52B3A9923" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_1E1FCAB73A5E79ABCBAAADE52B3AA303" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_47B333088271A7BCB038ADE52B3A9923" xlink:to="loc_us-gaap_ProductsAndServicesDomain_1E1FCAB73A5E79ABCBAAADE52B3AA303" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_EyleaNetProductSalesMember" xlink:label="loc_regn_EyleaNetProductSalesMember_9B0CA64BD2518EC76E60ADE52B3A9F94" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_1E1FCAB73A5E79ABCBAAADE52B3AA303" xlink:to="loc_regn_EyleaNetProductSalesMember_9B0CA64BD2518EC76E60ADE52B3A9F94" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_ArcalystNetProductSalesMember" xlink:label="loc_regn_ArcalystNetProductSalesMember_E5269345B82280B21BE9ADE52B3ADD5E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_1E1FCAB73A5E79ABCBAAADE52B3AA303" xlink:to="loc_regn_ArcalystNetProductSalesMember_E5269345B82280B21BE9ADE52B3ADD5E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_D21935C69F6A16F93A7FADE52B3A2F0E" xlink:type="locator" />
    <presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_D21935C69F6A16F93A7FADE52B3A2F0E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_0064B553D70FE01491CDADE52B3A3E8D" xlink:type="locator" />
    <presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_D21935C69F6A16F93A7FADE52B3A2F0E" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_0064B553D70FE01491CDADE52B3A3E8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_2D743D7D7AAB8A49538FADE52B3A2D4A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_0064B553D70FE01491CDADE52B3A3E8D" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_2D743D7D7AAB8A49538FADE52B3A2D4A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_7E389B83F4AB18AC6C81ADE52B3AEF31" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_7E389B83F4AB18AC6C81ADE52B3AEF31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_AC13B986EC0E85B2FBB6ADE52B3AF091" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_7E389B83F4AB18AC6C81ADE52B3AEF31" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_AC13B986EC0E85B2FBB6ADE52B3AF091" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_GrosssalesrevenueMember" xlink:label="loc_regn_GrosssalesrevenueMember_73D85B52043059DC0BA2ADE52B3A6497" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_AC13B986EC0E85B2FBB6ADE52B3AF091" xlink:to="loc_regn_GrosssalesrevenueMember_73D85B52043059DC0BA2ADE52B3A6497" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_AB18A1FF9F686D6AD768ADE52B3A762E" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_AB18A1FF9F686D6AD768ADE52B3A762E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_CA915F76DFD5A7063F82ADE52B3A2E80" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_AB18A1FF9F686D6AD768ADE52B3A762E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_CA915F76DFD5A7063F82ADE52B3A2E80" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_RebatesAndChargebacksMember" xlink:label="loc_regn_RebatesAndChargebacksMember_B458EC2E9DD12D9AE973ADE52B3A0194" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_CA915F76DFD5A7063F82ADE52B3A2E80" xlink:to="loc_regn_RebatesAndChargebacksMember_B458EC2E9DD12D9AE973ADE52B3A0194" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_DistributionRelatedFeesMember" xlink:label="loc_regn_DistributionRelatedFeesMember_4451AFCC387B51A7E8DFADE52B3A566E" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_CA915F76DFD5A7063F82ADE52B3A2E80" xlink:to="loc_regn_DistributionRelatedFeesMember_4451AFCC387B51A7E8DFADE52B3A566E" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_OtherSalesRelatedDeductionsMember" xlink:label="loc_regn_OtherSalesRelatedDeductionsMember_1697F09DC122B53E7A68ADE52B3ABD2E" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_CA915F76DFD5A7063F82ADE52B3A2E80" xlink:to="loc_regn_OtherSalesRelatedDeductionsMember_1697F09DC122B53E7A68ADE52B3ABD2E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_33712FE99263A3F7F65DADE52B3AB08B" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_regn_RevenueDisclosureTable_7D27F60839BA8D51FAD5ADE52B3ABCE9" xlink:to="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_33712FE99263A3F7F65DADE52B3AB08B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_6443318B534E07FCFC66ADE52B3A02DE" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_33712FE99263A3F7F65DADE52B3AB08B" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_6443318B534E07FCFC66ADE52B3A02DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RisksAndUncertaintiesAbstract" xlink:label="loc_us-gaap_RisksAndUncertaintiesAbstract_710C334EBA649AA5EDC4ADE52B3A0843" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_33712FE99263A3F7F65DADE52B3AB08B" xlink:to="loc_us-gaap_RisksAndUncertaintiesAbstract_710C334EBA649AA5EDC4ADE52B3A0843" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_A255FE70F61B14158938ADE52B3A9C13" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RisksAndUncertaintiesAbstract_710C334EBA649AA5EDC4ADE52B3A0843" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_A255FE70F61B14158938ADE52B3A9C13" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_3CEB09452C8696570D48ADE52B3A1020" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_33712FE99263A3F7F65DADE52B3AB08B" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_3CEB09452C8696570D48ADE52B3A1020" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_23A6B84F4DA884BC9849ADE52B3A8D48" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_3CEB09452C8696570D48ADE52B3A1020" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_23A6B84F4DA884BC9849ADE52B3A8D48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts_F3D2940BC52506D4B9F3ADE52B3A92A1" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_3CEB09452C8696570D48ADE52B3A1020" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToOtherAccounts_F3D2940BC52506D4B9F3ADE52B3A92A1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_2320B28A9163D5AE4297ADE52B3A29E7" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_3CEB09452C8696570D48ADE52B3A1020" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_2320B28A9163D5AE4297ADE52B3A29E7" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetProductSalesPolicies" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_CE980BB347C42D036F5D661CDB3C1E97" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenueRecognitionRevenueReductions" xlink:label="loc_us-gaap_RevenueRecognitionRevenueReductions_99CBDFE680EBD1839266661C3BAEF4BC" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_CE980BB347C42D036F5D661CDB3C1E97" xlink:to="loc_us-gaap_RevenueRecognitionRevenueReductions_99CBDFE680EBD1839266661C3BAEF4BC" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/NetProductSalesTables" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_295A1408CE833857C9B98FA52590D6B2" xlink:type="locator" />
    <loc xlink:href="regn-20140331.xsd#regn_ScheduleOfSalesRelatedDeductionsActivityTableTextBlock" xlink:label="loc_regn_ScheduleOfSalesRelatedDeductionsActivityTableTextBlock_61EB4D0351761FA265828FA525903A5D" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_295A1408CE833857C9B98FA52590D6B2" xlink:to="loc_regn_ScheduleOfSalesRelatedDeductionsActivityTableTextBlock_61EB4D0351761FA265828FA525903A5D" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/StatementOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_90B09FED10A95D902CA3A88082B945E1" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashFlowSupplementalDisclosuresTextBlock" xlink:label="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_599D33A52855172C0D23A88082B93E9F" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_90B09FED10A95D902CA3A88082B945E1" xlink:to="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_599D33A52855172C0D23A88082B93E9F" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/StatementOfCashFlowsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_1D3D8C688D51DBBDF222B7F49CA88C60" xlink:type="locator" />
    <loc xlink:href="regn-20140331.xsd#regn_AccruedCapitalExpenditures" xlink:label="loc_regn_AccruedCapitalExpenditures_B25DF74F27A03EFE1D42B7F49CA8B84C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_1D3D8C688D51DBBDF222B7F49CA88C60" xlink:to="loc_regn_AccruedCapitalExpenditures_B25DF74F27A03EFE1D42B7F49CA8B84C" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Facilityleaseobligationrecognizedduringtheperiod" xlink:label="loc_regn_Facilityleaseobligationrecognizedduringtheperiod_D81E481B7E3B7D6A1660B8AF7BD860F9" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_1D3D8C688D51DBBDF222B7F49CA88C60" xlink:to="loc_regn_Facilityleaseobligationrecognizedduringtheperiod_D81E481B7E3B7D6A1660B8AF7BD860F9" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/SubsequentEvents" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_2CD30B0578DBA5C6F7B5ADC9B6AF3838" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_908384A78122F3C9A01EADC9B6BFDB43" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_2CD30B0578DBA5C6F7B5ADC9B6AF3838" xlink:to="loc_us-gaap_SubsequentEventTable_908384A78122F3C9A01EADC9B6BFDB43" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_D99E62DA64ED0C83E838ADC9B6BFAE2C" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_908384A78122F3C9A01EADC9B6BFDB43" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_D99E62DA64ED0C83E838ADC9B6BFAE2C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4742F5DEC9B7901C8781ADC9B6BF0AC6" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_D99E62DA64ED0C83E838ADC9B6BFAE2C" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4742F5DEC9B7901C8781ADC9B6BF0AC6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_69B1404595F46C026C5DADC9B6BF1065" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_908384A78122F3C9A01EADC9B6BFDB43" xlink:to="loc_us-gaap_SubsequentEventLineItems_69B1404595F46C026C5DADC9B6BF1065" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_198B4B61B0679647F2F9ADC9B6BFBA98" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_69B1404595F46C026C5DADC9B6BF1065" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_198B4B61B0679647F2F9ADC9B6BFBA98" xlink:type="arc" />
  </presentationLink>
  <presentationLink xlink:role="http://www.regeneron.com/role/SubsequentEventsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_780D1E09C37214A47083D1E9AE5C7598" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_11D7236BA542A0650926D1E9AE5C1F4A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_780D1E09C37214A47083D1E9AE5C7598" xlink:to="loc_us-gaap_SubsequentEventTable_11D7236BA542A0650926D1E9AE5C1F4A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_17E6D371E1D56C56492DD1E9AE5CB7D9" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_11D7236BA542A0650926D1E9AE5C1F4A" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_17E6D371E1D56C56492DD1E9AE5CB7D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0FC1844849E0229CC6B7D1E9AE5CD122" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_17E6D371E1D56C56492DD1E9AE5CB7D9" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0FC1844849E0229CC6B7D1E9AE5CD122" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConvertibleDebtMember" xlink:label="loc_us-gaap_ConvertibleDebtMember_FD7DBD23B472DADC0CD0D1E9AE5C5F3A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_0FC1844849E0229CC6B7D1E9AE5CD122" xlink:to="loc_us-gaap_ConvertibleDebtMember_FD7DBD23B472DADC0CD0D1E9AE5C5F3A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_6BE3C57C454C8C6024B1D1E9AE5CE4E7" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_11D7236BA542A0650926D1E9AE5C1F4A" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_6BE3C57C454C8C6024B1D1E9AE5CE4E7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_C2C880B822B230E4D6BBD1E9AE5C3FE7" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6BE3C57C454C8C6024B1D1E9AE5CE4E7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_C2C880B822B230E4D6BBD1E9AE5C3FE7" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_CollaborationAgreementwithAvalancheBiotechnologiesinc.Member" xlink:label="loc_regn_CollaborationAgreementwithAvalancheBiotechnologiesinc.Member_465500D7F39353CEF38ED1E9AE5CF43A" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_C2C880B822B230E4D6BBD1E9AE5C3FE7" xlink:to="loc_regn_CollaborationAgreementwithAvalancheBiotechnologiesinc.Member_465500D7F39353CEF38ED1E9AE5CF43A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_11D7236BA542A0650926D1E9AE5C1F4A" xlink:to="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_DebtConversion" xlink:label="loc_regn_DebtConversion_CA7DA41F37B8FE73AE0AD1E9AE5CD109" xlink:type="locator" />
    <presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_DebtConversion_CA7DA41F37B8FE73AE0AD1E9AE5CD109" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2815ED6F5840AB178D36D1E9AE5C16B4" xlink:type="locator" />
    <presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2815ED6F5840AB178D36D1E9AE5C16B4" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Tradingdaystocalculatesettlement" xlink:label="loc_regn_Tradingdaystocalculatesettlement_2E141141096B4FA741FBD1E9AE5CE11C" xlink:type="locator" />
    <presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_Tradingdaystocalculatesettlement_2E141141096B4FA741FBD1E9AE5CE11C" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Prepaymentofcollaborationresearchcosts" xlink:label="loc_regn_Prepaymentofcollaborationresearchcosts_E711F9509C0CE166F681D1E9AE5C43D3" xlink:type="locator" />
    <presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_Prepaymentofcollaborationresearchcosts_E711F9509C0CE166F681D1E9AE5C43D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff" xlink:label="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_938A0A869DD8D8B1A581D1E9AE5C89C1" xlink:type="locator" />
    <presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_938A0A869DD8D8B1A581D1E9AE5C89C1" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Numberoftherapeutictargets" xlink:label="loc_regn_Numberoftherapeutictargets_11876FD6331C488945C7D1E9AE5CC6A5" xlink:type="locator" />
    <presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_Numberoftherapeutictargets_11876FD6331C488945C7D1E9AE5CC6A5" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_Paymenttoacquirepreferredshareofnonpublicentity" xlink:label="loc_regn_Paymenttoacquirepreferredshareofnonpublicentity_806D657577C3CB2FB809D1E9AE5CE077" xlink:type="locator" />
    <presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_Paymenttoacquirepreferredshareofnonpublicentity_806D657577C3CB2FB809D1E9AE5CE077" xlink:type="arc" />
    <loc xlink:href="regn-20140331.xsd#regn_NumberoftherapeutictargetsofAvalancheschoice" xlink:label="loc_regn_NumberoftherapeutictargetsofAvalancheschoice_E4F6EDF966775A603898D1E9AE5C3DFD" xlink:type="locator" />
    <presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_12DEA0D84507C42F0F94D1E9AE5C19BB" xlink:to="loc_regn_NumberoftherapeutictargetsofAvalancheschoice_E4F6EDF966775A603898D1E9AE5C3DFD" xlink:type="arc" />
  </presentationLink>
</linkbase>
