<SEC-DOCUMENT>0001193125-15-114958-index.html : 20150401
<SEC-HEADER>0001193125-15-114958.hdr.sgml : 20150401
<ACCEPTANCE-DATETIME>20150401060603
ACCESSION NUMBER:		0001193125-15-114958
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20150401
DATE AS OF CHANGE:		20150401
GROUP MEMBERS:		AMGEN INVESTMENTS LTD.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Atara Biotherapeutics, Inc.
		CENTRAL INDEX KEY:			0001604464
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				460920988
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88393
		FILM NUMBER:		15741228

	BUSINESS ADDRESS:	
		STREET 1:		3260 BAYSHORE BOULEVARD
		CITY:			BRISBANE
		STATE:			CA
		ZIP:			94005
		BUSINESS PHONE:		415-287-2410

	MAIL ADDRESS:	
		STREET 1:		3260 BAYSHORE BOULEVARD
		CITY:			BRISBANE
		STATE:			CA
		ZIP:			94005

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMGEN INC
		CENTRAL INDEX KEY:			0000318154
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				953540776
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		ONE AMGEN CENTER DRIVE
		CITY:			THOUSAND OAKS
		STATE:			CA
		ZIP:			91320
		BUSINESS PHONE:		(805)447-1000

	MAIL ADDRESS:	
		STREET 1:		ONE AMGEN CENTER DRIVE
		CITY:			THOUSAND OAKS
		STATE:			CA
		ZIP:			91320

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMGEN
		DATE OF NAME CHANGE:	19870305
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>d898472dsc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: d898472dsc13g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d898472dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d898472dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>