<SEC-DOCUMENT>0001193125-17-206012-index.html : 20170616
<SEC-HEADER>0001193125-17-206012.hdr.sgml : 20170616
<ACCEPTANCE-DATETIME>20170616161727
ACCESSION NUMBER:		0001193125-17-206012
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20170616
DATE AS OF CHANGE:		20170616
EFFECTIVENESS DATE:		20170616

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:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-218799
		FILM NUMBER:		17916350

	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>S-8
<SEQUENCE>1
<FILENAME>d405567ds8.htm
<DESCRIPTION>S-8
<TEXT>
Document 1 - file: d405567ds8.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>2
<FILENAME>d405567dex5.htm
<DESCRIPTION>EX-5
<TEXT>
Document 2 - file: d405567dex5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>d405567dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: d405567dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g405567g13e29.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g405567g13e29.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g405567g60d92.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g405567g60d92.jpg

</DOCUMENT>
</SEC-DOCUMENT>