SEVENTH SUPPLEMENT DATED MAY 4, 1998
TO SIXTH SUPPLEMENT DATED APRIL 3,1998,
FIFTH SUPPLEMENT DATED APRIL 1, 1998,
FOURTH SUPPLEMENT DATED MARCH 23,1998,
THIRD SUPPLEMENT DATED FEBRUARY 25, 1998,
SECOND SUPPLEMENT DATED JANUARY 21, 1998,
PROSPECTUS SUPPLEMENT DATED DECEMBER 19, 1997,
TO PROSPECTUS DATED NOVEMBER 26, 1997
COSTCO COMPANIES, INC.
The following table sets forth certain information as of May 4, 1998 as
to the security ownership of persons not named as Selling Securityholders in the
Prospectus dated November 26, 1997 ("Prospectus") or the Prospectus Supplements
dated December 19, 1997, or January 21, February 25, March 23, April 1, and
April 3, 1998 ("Prospectus Supplements"), and information reflecting additional
securities offered by Donaldson, Lufkin & Jenrette Securities Corp. ("DLJ")
since it was last named as a Selling Securityholder. Amounts shown are not
adjusted for any sales that Selling Securityholders may have made pursuant to
the Registration Statement of which the Prospectus and Prospectus Supplements
form a part. DLJ has provided and will continue to provide financial advisory
services to Costco Companies, Inc. (the "Company") for which DLJ has received
customary fees. Hamilton E. James, a Managing Director of DLJ, is a member of
the Board of Directors of the Company. Except as set forth for DLJ, none of the
Selling Securityholders listed below has had a material relationship with the
Company or any of its predecessors or affiliates within the past three years.
Face Amount of Notes Shares of Common Stock Owned
Selling Securityholder Owned Prior to Offering Prior to Offering1
($)
Donaldson, Lufkin & Jenrette
Securities Corporation 87,770,0002 996,584
Van Reed Growth Fund 500,000 5,677
Walnut Street Associates 200,000 2,270
1 Includes the Shares into which the Notes are convertible.
2 Includes securities previously registered.
The date of this Prospectus Supplement is May 4, 1998
