<SEC-DOCUMENT>0001123292-22-000015-index.html : 20220210
<SEC-HEADER>0001123292-22-000015.hdr.sgml : 20220210
<ACCEPTANCE-DATETIME>20220210165505
ACCESSION NUMBER:		0001123292-22-000015
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20220210
DATE AS OF CHANGE:		20220210

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sierra Oncology, Inc.
		CENTRAL INDEX KEY:			0001290149
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89009
		FILM NUMBER:		22614939

	BUSINESS ADDRESS:	
		STREET 1:		1820 GATEWAY DRIVE
		STREET 2:		SUITE 110
		CITY:			SAN MATEO
		STATE:			CA
		ZIP:			94404
		BUSINESS PHONE:		(605) 376-8679

	MAIL ADDRESS:	
		STREET 1:		1820 GATEWAY DRIVE
		STREET 2:		SUITE 110
		CITY:			SAN MATEO
		STATE:			CA
		ZIP:			94404

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ProNAi Therapeutics Inc
		DATE OF NAME CHANGE:	20040513

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GILEAD SCIENCES INC
		CENTRAL INDEX KEY:			0000882095
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				943047598
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		333 LAKESIDE DR
		CITY:			FOSTER CITY
		STATE:			CA
		ZIP:			94404
		BUSINESS PHONE:		6505743000

	MAIL ADDRESS:	
		STREET 1:		333 LAKESIDE DR
		CITY:			FOSTER CITY
		STATE:			CA
		ZIP:			94404
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>sierra13ga.htm
<TEXT>
Document 1 - file: sierra13ga.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>image2.jpg
<TEXT>
Document 2 - file: image2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>image3.jpg
<TEXT>
Document 3 - file: image3.jpg

</DOCUMENT>
</SEC-DOCUMENT>