    <SEC-DOCUMENT>0000909832-17-000019-index.html : 20171215
    <SEC-HEADER>0000909832-17-000019.hdr.sgml : 20171215
    <ACCEPTANCE-DATETIME>20171215155246
    ACCESSION NUMBER:		0000909832-17-000019
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		5
    FILED AS OF DATE:		20171215
    DATE AS OF CHANGE:		20171215
    EFFECTIVENESS DATE:		20171215

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			COSTCO WHOLESALE CORP /NEW
    		CENTRAL INDEX KEY:			0000909832
    		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-VARIETY STORES [5331]
    		IRS NUMBER:				911223280
    		STATE OF INCORPORATION:			WA
    		FISCAL YEAR END:			0902

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-20355
    		FILM NUMBER:		171258934

    	BUSINESS ADDRESS:
    		STREET 1:		999 LAKE DRIVE
    		CITY:			ISSAQUAH
    		STATE:			WA
    		ZIP:			98027-
    		BUSINESS PHONE:		4253138100

    	MAIL ADDRESS:
    		STREET 1:		999 LAKE DRIVE
    		CITY:			ISSAQUAH
    		STATE:			WA
    		ZIP:			98027

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	COSTCO COMPANIES INC
    		DATE OF NAME CHANGE:	19970401

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	PRICE/COSTCO INC
    		DATE OF NAME CHANGE:	19930728
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>costdefproxy2017additional.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: costdefproxy2017additional.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>cardimage1.jpg
    <TEXT>
    Document 2 - file: cardimage1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>cardimage2.jpg
    <TEXT>
    Document 3 - file: cardimage2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>cardimage3.jpg
    <TEXT>
    Document 4 - file: cardimage3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>cardimage4.jpg
    <TEXT>
    Document 5 - file: cardimage4.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>