    <SEC-DOCUMENT>0001193125-16-542448-index.html : 20160415
    <SEC-HEADER>0001193125-16-542448.hdr.sgml : 20160415
    <ACCEPTANCE-DATETIME>20160415090040
    ACCESSION NUMBER:		0001193125-16-542448
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		27
    CONFORMED PERIOD OF REPORT:	20160608
    FILED AS OF DATE:		20160415
    DATE AS OF CHANGE:		20160415
    EFFECTIVENESS DATE:		20160415

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BIOGEN INC.
    		CENTRAL INDEX KEY:			0000875045
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		IRS NUMBER:				330112644
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-19311
    		FILM NUMBER:		161573255

    	BUSINESS ADDRESS:
    		STREET 1:		225 BINNEY STREET
    		CITY:			CAMBRIDGE
    		STATE:			MA
    		ZIP:			02142
    		BUSINESS PHONE:		7814642000

    	MAIL ADDRESS:
    		STREET 1:		225 BINNEY STREET
    		CITY:			CAMBRIDGE
    		STATE:			MA
    		ZIP:			02142

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BIOGEN IDEC INC.
    		DATE OF NAME CHANGE:	20070427

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BIOGEN IDEC INC
    		DATE OF NAME CHANGE:	20031112

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	IDEC PHARMACEUTICALS CORP / DE
    		DATE OF NAME CHANGE:	19970530
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>d47562ddef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: d47562ddef14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g47562computer_small.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g47562computer_small.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g47562g02h63.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g47562g02h63.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g47562g07e46.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g47562g07e46.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g47562g26c48.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g47562g26c48.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g47562g29i58.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g47562g29i58.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g47562g29q54.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g47562g29q54.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g47562g31j23.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g47562g31j23.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g47562g40f73.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g47562g40f73.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g47562g41k61.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g47562g41k61.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g47562g41m12.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g47562g41m12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g47562g41u81.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g47562g41u81.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g47562g46j74.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g47562g46j74.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g47562g49c27.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g47562g49c27.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>g47562g63o02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g47562g63o02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>g47562g68a70.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g47562g68a70.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>g47562g74m33.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g47562g74m33.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>g47562g74x82.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g47562g74x82.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>g47562g77e15.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g47562g77e15.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>g47562g77n77.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g47562g77n77.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>g47562g91v63.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: g47562g91v63.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>g47562g96h57.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: g47562g96h57.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>g47562g98j05.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: g47562g98j05.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>g47562mail_small.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g47562mail_small.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>g47562pcpg01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: g47562pcpg01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>g47562person_small.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: g47562person_small.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>g47562phone_small.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: g47562phone_small.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>