Filed Pursuant to Rule 424(b)(3)
                                                      Registration No. 333-63976
                                                      Registration No. 333-67988
               Trust Preferred Income Equity Redeemable Securities (PIERS) Units
                                                           CUSIP No. 939322 84 8
             Warrants to purchase shares of Washington Mutual, Inc. Common Stock
                                                           CUSIP No. 939322 11 1
       Trust Preferred Securities issued by Washington Mutual Capital Trust 2001
                                                           CUSIP No. 93933U 40 7


PROSPECTUS SUPPLEMENT DATED OCTOBER 16, 2001
(TO PROSPECTUS DATED SEPTEMBER 4, 2001)

                             WASHINGTON MUTUAL, INC.

               Trust Preferred Income Equity Redeemable Securities
                                  (PIERS) Units

This document  supplements the prospectus  dated September 4, 2001,  relating to
the units. Each unit consists of:

     o    a preferred  security  issued by Washington  Mutual Capital Trust 2001
          (the "Trust"), having a stated liquidation amount of $50, representing
          an  undivided  beneficial  interest in the assets of the Trust,  which
          assets consist solely of subordinated  debentures issued by Washington
          Mutual,  Inc. each of which has a principal amount at maturity of $50,
          a stated  maturity of July 1, 2041 and, at any time, an accreted value
          as described in the prospectus; and

     o    a warrant to  purchase  at any time prior to the close of  business on
          May 3, 2041, 1.2081 shares of common stock of Washington  Mutual.  The
          exercise  price of each  warrant on the initial  date of issuance  was
          $32.33  and  will  accrete  on a  daily  basis  as  described  in  the
          prospectus to $50 on the expiration date.

At any time after  issuance of the units,  the  preferred  security  and warrant
components  of  each  unit  may be  separated  by  the  holder  and  transferred
separately.  Thereafter,  a  separated  preferred  security  and  warrant may be
combined to form a unit.

The information in this  prospectus  supplements the information set forth under
the heading "Selling Securityholders" in the prospectus dated September 4, 2001.
First Union  Securities  Inc. was listed in the September 4, 2001 prospectus and
has subsequently  purchased  additional units. As a result,  the number of units
eligible  for resale  pursuant  to the  Registration  Statement  by First  Union
Securities  Inc.  is  adjusted  to the number  set forth  opposite  First  Union
Securities Inc.'s name (without  adjustment for any resales that such person has
made pursuant to the  Registration  Statement).  The other person named below is
added to the list of Selling  Securityholders,  and the number of units that may
be sold  pursuant to the  Registration  Statement is as set forth  opposite such
person's name.



                                                                                          
             Selling Securityholder          Securities Beneficially Owned Prior to             Securities That
                                                           the Offering                           May be Sold
                                                                                                   Hereunder
                                                  Number                   Type
First Union Securities Inc. . . . . . . .          653,945                 Units                    653,945
TCW Group, Inc. . . . . . . . . . . . . .
                                                   255,700                 Units                    255,700



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"Preferred Income Equity Redeemable Securities" and "PIERS" are service marks
owned by Lehman Brothers Inc.

     NEITHER THE  SECURITIES AND EXCHANGE  COMMISSION  NOR ANY STATE  SECURITIES
COMMISSION  HAS APPROVED OR DISAPPROVED  THESE  SECURITIES OR DETERMINED IF THIS
PROSPECTUS  IS TRUTHFUL OR  COMPLETE.  ANY  REPRESENTATION  TO THE CONTRARY IS A
CRIMINAL OFFENSE.

     THESE SECURITIES OFFERED HEREBY ARE NOT SAVINGS ACCOUNTS, DEPOSITS OR OTHER
OBLIGATIONS  OF ANY  BANK OR  SAVINGS  ASSOCIATION  AND ARE NOT  INSURED  BY THE
FEDERAL  DEPOSIT  INSURANCE  CORPORATION,  THE BANK INSURANCE  FUND, THE SAVINGS
ASSOCIATION INSURANCE FUND OR ANY OTHER GOVERNMENTAL AGENCY.