SUPPLEMENT DATED MARCH 8, 1999,
TO SUPPLEMENTS DATED FEBRUARY 19, AND FEBRUARY 4, 1999,
OCTOBER 26, OCTOBER 13, AUGUST 17, JULY 16,
MAY 22, MAY 4, APRIL 3, APRIL 1, MARCH 23,
FEBRUARY 25, AND JANUARY 21, 1998, AND DECEMBER 19, 1997,
TO PROSPECTUS DATED NOVEMBER 26, 1997
COSTCO COMPANIES, INC.
The following table sets forth certain information as of March 8, 1999
as to the security ownership of persons not named as Selling Securityholders
in the Prospectus or the Prospectus Supplements.
Face Amount of Notes Shares of Common
Owned Prior to Stock Owned Prior
Selling Securityholder Offering($) to Offering 1
Colgate-Palmolive
Company Retirement Trust 2,000,000 22,709
Golden Rule Insurance Company 2,000,000 22,709
Lehman Brothers Inc. 10,100,000 114,680
Mark IV Industries, Inc.
and Subsidiaries Master Trust 1,000,000 11,354
Morgan Stanley Dean Witter 850,000 9,651
Mount Sinai School of Medicine 1,000,000 11,354
Pitney Bowes Retirement fund 2,400,000 27,250
Xerox Corporation and the Profit
Sharing Joint Administrative 5,100,000 57,907
Board
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1 Includes the Shares into which the Notes are convertible.
The date of this Prospectus Supplement is March 8, 1999.
