EXHIBIT 2.1

                          PLAN AND AGREEMENT OF MERGER

                                     BETWEEN

                          COSTCO WHOLESALE CORPORATION

                                       AND

                             COSTCO COMPANIES, INC.

     This Plan and Agreement of Merger (this  "Agreement")  is entered into this
27th day of  August,  1999,  by and  between  Costco  Wholesale  Corporation,  a
Washington  corporation  (the "Surviving  Corporation"),  and Costco  Companies,
Inc., a Delaware  corporation  ("CCI").  The Surviving  Corporation  and CCI are
sometimes referred to jointly as the "Constituent Corporations."

                                    RECITALS

     A. Each of the  Constituent  Corporations  are  corporations  organized and
existing  under  the laws of the  respective  states as  indicated  in the first
paragraph of this Agreement.

     B. The shareholders  and directors of each of the Constituent  Corporations
have deemed it advisable for the mutual benefit of the Constituent  Corporations
and  their  respective  shareholders  that  CCI be  merged  into  the  Surviving
Corporation  pursuant to the provisions of the Washington  Business  Corporation
Act,  Title 23B of the  Revised  Code of  Washington  and the  Delaware  General
Corporation Law (the "Merger").

     C.  It  is  intended   that  the  Merger   shall   qualify  as  a  tax-free
reorganization within the meaning of Section 368(a) of the Internal Revenue Code
of 1986, as amended.

     NOW, THEREFORE, in accordance with the laws of the states of Washington and
Delaware,  the  Constituent  Corporations  agree that,  subject to the following
terms and  conditions,  (i) CCI shall be merged into the Surviving  Corporation,
(ii) the Surviving  Corporation shall continue to be governed by the laws of the
state of Washington, and

(iii) the terms of the Merger, and the mode of carrying them into effect,  shall
be as follows:

                                    ARTICLE I
                        ARTICLES OF SURVIVING CORPORATION

     The Articles of Incorporation of CWC as in effect  immediately prior to the
Effective  Time of the Merger shall  constitute  the "Articles" of the Surviving
Corporation  within  the  meaning  of Section  23B.01.400(1)  of the  Washington
Business  Corporation  Act and Section 104 of the Delaware  General  Corporation
Law.


                                   ARTICLE II
                  APPOINTMENT OF AGENT FOR SERVICE OF PROCESS

     Pursuant to Section  252(d) of the Delaware  General  Corporation  Law, the
Surviving Corporation irrevocably appoints the Secretary of State of Delaware to
accept  service of process in any  proceeding  to enforce  against the Surviving
Corporation any obligation of CCI's as well as for enforcement of any obligation
of the Surviving  Corporation arising from the merger. The Delaware Secretary of
State shall mail a copy of such process to Costco Wholesale  Corporation,  Attn:
Legal Department, 999 Lake Drive, Issaquah, WA 98027.

                                  ARTICLE III
                              CONVERSION OF SHARES

     CCI Shares.  At the Effective Time of the Merger each outstanding  share of
the common stock of CCI shall automatically convert to one share of common stock
of Costco  Wholesale  Corporation.  It will not be necessary for shareholders of
CCI to exchange their existing stock  certificates for stock certificates of the
Surviving Corporation.

     Surviving  Corporation  Shares.  At the  Effective  Time of the Merger each
outstanding  share of the common stock of the Surviving  Corporation held by CCI
immediately  prior to the  Effective  Time shall be  automatically  canceled and
returned to the status of authorized but unissued shares.

                                   ARTICLE IV
                                     BYLAWS

     The Bylaws of the Surviving Corporation shall be the governing Bylaws.

                                   ARTICLE V
                             DIRECTORS AND OFFICERS

     The  directors  and officers of CCI shall be the  directors and officers of
the Surviving Corporation.

                                   ARTICLE VI
                              EFFECT OF THE MERGER

     The effect of the Merger shall be as provided by the applicable  provisions
of the laws of Washington and Delaware.  Without  limiting the generality of the
foregoing,  and  subject  thereto,  at the  Effective  Time of the  Merger:  the
separate  existence of CCI shall cease; the Surviving  Corporation shall possess
all  assets and  property  of every  description,  and every  interest  therein,
wherever located, and the rights,  privileges,



immunities,  powers,  franchises, and authority of a public as well as a private
nature, of all of the Constituent Corporations,  all obligations belonging to or
due any of the  Constituent  Corporations  shall be  vested  in and  become  the
obligations of, the Surviving  Corporation without further act or deed; title to
any  real  estate  or any  interest  therein  vested  in any of the  Constituent
Corporations  shall be vested in and become  the  obligations  of the  Surviving
Corporation  without  further  act or  deed;  title to any  real  estate  or any
interest  therein  shall not revert or in any way be  impaired  by reason of the
Merger;  all rights of  creditors  and all liens upon any property of any of the
Constituent  Corporations  shall  be  preserved  unimpaired;  and the  Surviving
Corporation  shall  be  liable  for  all  the  obligations  of  the  Constituent
Corporations  and any claim  existing,  or action or proceeding  pending,  by or
against any of the Constituent  Corporations  may be prosecuted to judgment with
right of appeal, as if the Merger had not taken place.

     If at any  time  after  the  Effective  Time of the  Merger  the  Surviving
Corporation  shall  consider it to be  advisable  that any further  conveyances,
agreements,  documents,  instruments,  and assurances of law or any other things
are necessary or desirable to vest, perfect, confirm, or record in the Surviving
Corporation  the  title  to  any  property,  rights,  privileges,   powers,  and
franchises  of the  Constituent  Corporations  or  otherwise  to  carry  out the
provisions  of  this  Agreement,  the  proper  directors  and  officers  of  the
Constituent  Corporations  last in office shall  execute and  deliver,  upon the
Surviving  Corporation's  request,  any and all proper conveyances,  agreements,
documents,  instruments,  and assurances of law, and do all things  necessary or
proper to vest, perfect, or confirm title to such property,  rights, privileges,
powers, and title to such property, rights,  privileges,  powers, and franchises
in the Surviving Corporation,  and otherwise to carry out the provisions of this
Agreement.

                                  ARTICLE VII
                          EFFECTIVE TIME OF THE MERGER

     As used in this  Agreement,  the "Effective  Time of the Merger" shall mean
the time at which executed  counterparts  of this Agreement or conformed  copies
thereof,  together  with duly executed  Certificates  or Articles of Merger have
been duly filed by the Constituent  Corporations in the office of the Washington
Secretary of State  pursuant to Section 23B.1 1.050 of the  Washington  Business
Corporation  Act and the Office of the Delaware  Secretary of State  pursuant to
Section 252 of the Delaware General  Corporation Law, or at such time thereafter
as is provided in such Certificate or Articles of Merger.

                                  ARTICLE VIII
                                  TERMINATION

     This Agreement may be terminated and the Merger abandoned by mutual consent
of the  directors  of the  Constituent  Corporations  at any  time  prior to the
Effective Time of the Merger.



                                   ARTICLE IX
                          NO THIRD PARTY BENEFICIARIES

     Except as otherwise  specifically  provided  herein,  nothing  expressed or
implied in this Agreement is intended, or shall be construed,  to confer upon or
give any person, firm, or corporation,  other than the Constituent  Corporations
and their respective shareholders,  any rights or remedies under or by reason of
this Agreement.

     IN WITNESS WHEREOF,  the parties hereto have caused this Plan and Agreement
of Merger to be executed as of the date first above written.



                              COSTCO WHOLESALE CORPORATION ("CWC"),
                               a Washington corporation



                              By /s/ James D. Sinegal
                                James D. Sinegal, President


ATTEST:



By  /s/ Richard J. Olin
    Richard J. Olin, Assistant Secretary

                              COSTCO WHOLESALE CORPORATION ("CWC"),
                               a Delaware corporation



                              By /s/ James D. Sinegal
                                 James D. Sinegal, President and CEO

ATTEST:



By /s/ Richard J. Olin
   Richard J. Olin, Assistant Secretary