<SEC-DOCUMENT>0001104659-20-013787-index.html : 20200210
<SEC-HEADER>0001104659-20-013787.hdr.sgml : 20200210
<ACCEPTANCE-DATETIME>20200210172429
ACCESSION NUMBER:		0001104659-20-013787
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200210
DATE AS OF CHANGE:		20200210

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
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89009
		FILM NUMBER:		20593049

	BUSINESS ADDRESS:	
		STREET 1:		2150 ? 885 WEST GEORGIA STREET
		CITY:			VANCOUVER
		STATE:			A1
		ZIP:			V6C 3E8
		BUSINESS PHONE:		604-558-6536

	MAIL ADDRESS:	
		STREET 1:		2150 ? 885 WEST GEORGIA STREET
		CITY:			VANCOUVER
		STATE:			A1
		ZIP:			V6C 3E8

	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

	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
<SEQUENCE>1
<FILENAME>a20-7227_1sc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: a20-7227_1sc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>