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Biogen Inc. – ‘DEF 14A’ on 4/28/23 – ‘EX-101.DEF’

On:  Friday, 4/28/23, at 5:20pm ET   ·   Accession #:  1193125-23-127639   ·   File #:  0-19311

Previous ‘DEF 14A’:  ‘DEF 14A’ on 4/29/22 for 6/15/22   ·   Next & Latest:  ‘DEF 14A’ on 4/26/24 for 6/20/24

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 4/28/23  Biogen Inc.                       DEF 14A               12:11M                                    Donnelley … Solutions/FA

Definitive Proxy Statement   —   Schedule 14A

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: DEF 14A     Definitive Proxy Statement                          HTML   2.42M 
 6: R1          Cover                                               HTML     16K 
 7: R2          Pay vs Performance Disclosure                       HTML    197K 
10: XML         IDEA XML File -- Filing Summary                      XML     29K 
 8: XML         XBRL Instance -- d422936ddef14a_htm                  XML    291K 
 9: EXCEL       IDEA Workbook of Financial Reports                  XLSX     15K 
 3: EX-101.DEF  XBRL Definitions -- biib-20221231_def                XML     18K 
 4: EX-101.LAB  XBRL Labels -- biib-20221231_lab                     XML     21K 
 5: EX-101.PRE  XBRL Presentations -- biib-20221231_pre              XML     16K 
 2: EX-101.SCH  XBRL Schema -- biib-20221231                         XSD     17K 
11: JSON        XBRL Instance as JSON Data -- MetaLinks              101±   125K 
12: ZIP         XBRL Zipped Folder -- 0001193125-23-127639-xbrl      Zip   3.65M

‘EX-101.DEF’   —   XBRL Definitions — biib-20221231_def

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- Generated by DFIN XBRL Instance Document - http://www.dfinsolutions.com/ - Version R3.0 - on 29-April-2023 [12:20:42] {AM} -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
<roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#IndividualsOnly" roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly"/>
<roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#PvpAdjustmentsOnly" roleURI="http://xbrl.sec.gov/ecd/role/PvpAdjustmentsOnly"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
<arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll"/>
<definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly">
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#ecd_AllIndividualsMember" xlink:label="AllIndividualsMember"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_Mr.viehbacherMember" xlink:label="Mr.viehbacherMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllIndividualsMember" xlink:to="Mr.viehbacherMember" order="100"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_Mr.vounatsosMember" xlink:label="Mr.vounatsosMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllIndividualsMember" xlink:to="Mr.vounatsosMember" order="101"/>
</definitionLink>
<definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/ecd/role/PvpAdjustmentsOnly">
<loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/ecd/2022q4/ecd-2022q4.xsd#ecd_AllAdjToCompMember" xlink:label="AllAdjToCompMember"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_StockAwardsAndOptionAwardsMember" xlink:label="StockAwardsAndOptionAwardsMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="StockAwardsAndOptionAwardsMember" order="102"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_YearendForAwardsGrantedDuringTheYearMember" xlink:label="YearendForAwardsGrantedDuringTheYearMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="YearendForAwardsGrantedDuringTheYearMember" order="103"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_YearoveryearIncreaseOrDecreaseOfUnvestedAwardsGrantedInPriorYearsMember" xlink:label="YearoveryearIncreaseOrDecreaseOfUnvestedAwardsGrantedInPriorYearsMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="YearoveryearIncreaseOrDecreaseOfUnvestedAwardsGrantedInPriorYearsMember" order="104"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_PriorFiscalYearendForAwardsThatVestedDuringTheYearMember" xlink:label="PriorFiscalYearendForAwardsThatVestedDuringTheYearMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="PriorFiscalYearendForAwardsThatVestedDuringTheYearMember" order="105"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_TotalEquityAwardAdjustmentsMember" xlink:label="TotalEquityAwardAdjustmentsMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="TotalEquityAwardAdjustmentsMember" order="106"/>
<loc xlink:type="locator" xlink:href="biib-20221231.xsd#biib_YearoveryearChangeInFairValueOfEquityAwardsMember" xlink:label="YearoveryearChangeInFairValueOfEquityAwardsMember"/>
<definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllAdjToCompMember" xlink:to="YearoveryearChangeInFairValueOfEquityAwardsMember" order="107"/>
</definitionLink>
</linkbase>

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