<SEC-DOCUMENT>0000902664-21-001138-index.html : 20210211
<SEC-HEADER>0000902664-21-001138.hdr.sgml : 20210211
<ACCEPTANCE-DATETIME>20210211075900
ACCESSION NUMBER:		0000902664-21-001138
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210211
DATE AS OF CHANGE:		20210211

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Xenon Pharmaceuticals Inc.
		CENTRAL INDEX KEY:			0001582313
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				980661854
		STATE OF INCORPORATION:			A1
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88403
		FILM NUMBER:		21616788

	BUSINESS ADDRESS:	
		STREET 1:		200 - 3650 GILMORE WAY
		CITY:			BURNABY
		STATE:			A1
		ZIP:			V5G 48W
		BUSINESS PHONE:		(604) 484-3300

	MAIL ADDRESS:	
		STREET 1:		200 - 3650 GILMORE WAY
		CITY:			BURNABY
		STATE:			A1
		ZIP:			V5G 48W

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADAGE CAPITAL PARTNERS GP, L.L.C.
		CENTRAL INDEX KEY:			0001165408
		IRS NUMBER:				043574590
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		200 CLARENDON STREET
		STREET 2:		52ND FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		(617) 867-2800

	MAIL ADDRESS:	
		STREET 1:		200 CLARENDON STREET, 52ND FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ADAGE CAPITAL PARTNERS GP LLC
		DATE OF NAME CHANGE:	20020117
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>p21-0419sc13ga.htm
<DESCRIPTION>XENON PHARMACEUTICALS INC.
<TEXT>
Document 1 - file: p21-0419sc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>