SUPPLEMENT DATED MAY 5, 1998
                       TO SUPPLEMENTS DATED APRIL 2, 1998,
                      JANUARY 30, 1998, DECEMBER 23, 1997,
                    NOVEMBER 18, 1997, AND OCTOBER 24, 1997,
                      TO PROSPECTUS DATED OCTOBER 22, 1997

                             WASHINGTON MUTUAL, INC.


     On April 8, 1998,  Peter T.  Joseph,  who is named in the  Prospectus  as a
Selling Stockholder, transferred 10,000 shares of Common Stock to Ballet Theater
Foundation, Inc., 2,700 shares of Common Stock to Yale University and 340 shares
of Common Stock to another organization.

     As a result of the foregoing  transfers,  the number of Shares eligible for
resale pursuant to the  Registration  Statement by persons  previously  named as
Selling  Stockholders  and  named  below is  adjusted  to the  number  set forth
opposite such person's name (without adjustment for any resales that such person
has made  pursuant  to the  Registration  Statement).  Also as a  result  of the
foregoing  transfers,  the other  persons  named  below are added to the list of
Selling  Stockholders,  and the number of Shares that each may sell  pursuant to
the Registration Statement is as set forth opposite such person's name:



 Name                                                           Shares
                                                            
 Ballet Theater Foundation, Inc.                                10,000
 Prep for Prep                                                     340
 Yale University                                                 2,700
 Peter T. Joseph                                               530,395


             The date of this Prospectus Supplement is May 6, 1998.