<SEC-DOCUMENT>0001019056-15-000243-index.html : 20150218
<SEC-HEADER>0001019056-15-000243.hdr.sgml : 20150216
<ACCEPTANCE-DATETIME>20150217161143
ACCESSION NUMBER:		0001019056-15-000243
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150217
DATE AS OF CHANGE:		20150217
GROUP MEMBERS:		JOSEPH EDELMAN
GROUP MEMBERS:		PERCEPTIVE ADVISORS LLC

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Xencor Inc
		CENTRAL INDEX KEY:			0001326732
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				201622502
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87750
		FILM NUMBER:		15622470

	BUSINESS ADDRESS:	
		STREET 1:		111 WEST LEMON AVE
		CITY:			MONROVIA
		STATE:			CA
		ZIP:			91016
		BUSINESS PHONE:		626-305-5900

	MAIL ADDRESS:	
		STREET 1:		111 WEST LEMON AVE
		CITY:			MONROVIA
		STATE:			CA
		ZIP:			91016

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PERCEPTIVE ADVISORS LLC
		CENTRAL INDEX KEY:			0001224962
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		499 PARK AVENUE, 25TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		646-205-5340

	MAIL ADDRESS:	
		STREET 1:		499 PARK AVENUE, 25TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>xencor_13ga1.htm
<DESCRIPTION>SCHEDULE 13G/A
<TEXT>
Document 1 - file: xencor_13ga1.htm

</DOCUMENT>
</SEC-DOCUMENT>