                                                                                            EXHIBIT 99
                     WASHINGTON MUTUAL MORTGAGE SECURITIES ANDCORP.
                                  MASTER EXCHANGESERVICING
                         MORTGAGE COMMISSIONPASS-THROUGH CERTIFICATES
                                     450                             05/2003 FifthDISTRIBUTION Street,REPORT

SERIES:  wamu NW2001-ar6                                 WEIGHTED AVERAGE PC RATE:    5.70616%
                                     WashingtonPOOL NUMBER:  Group 1 = 1800
____________________________________________________________________________________________

ISSUE DATE:  12/14/2001
CERTIFICATE BALANCE AT ISSUE:    $814,842,698.14

                                                                 CERTIFICATE
                                                   TOTAL         ACCOUNT            CERTIFICATE
                                                   NUMBER DCOF     ACTIVITY           BALANCE
                                                   MORTGAGES     (@PC RATE)         OUTSTANDING
                                                   _________  20549__________________  __________________

                        BALANCES FROM LAST FISCAL MONTH-END:                     382                         $211,100,635.00
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month                      $90,914.18
Unscheduled Principal Collection/Reversals                           $165,225.73
Liquidations-in-full                                      48      $25,188,246.65
Net principal Distributed                                         $25,444,386.56    ($25,444,386.56)

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):                                                          $0.00

BALANCE CURRENT FISCAL MONTH---------------------------------------END:                        334                         $185,656,248.44

                                          FORMSCHEDULED 8INTEREST AT MORTGAGE RATE:                               $1,100,734.04

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals                                  $0.00
Interest Uncollected on Liquidation                                        $0.00
Interest Uncollected on Non-KEarning Assets                                 $0.00
Net Unscheduled Interest Distributed                                       CURRENT$0.00

OTHER:
Loan REPORTConversion Fees                                                       $0.00
Expense Reimbursements                                                     $0.00
                           PursuantGain toon SectionLiquidations                                                       $0.00
Hazard 13Insurance orPremium 15(d)Refunds                                           $0.00
Net ofOther theDistributions                                                    $0.00
                              Securities
SCHEDULED ExchangeSERVICING ActFEE ofEXPENSES:                                     $96,754.48

UNSCHEDULED 1934SERVICING FEES:
Unscheduled Service Fee Collections/Reversals                              $0.00
Servicing Fees Uncollected on Liquidation                                  $0.00
Servicing Fees Uncollected/Non-Earning Assets                              For$0.00
Net theUnscheduled MonthService ofFees January,Distributed                                   $0.00

MISCELLANEOUS 2002EXPENSES:                                                    $0.00

                          NET FUNDS DISTRIBUTED:                                            $26,448,366.12







                     WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
                                                                MASTER SERVICING
                         MORTGAGE PASS-THROUGH CERTIFICATES,
                                                                  05/2003 DISTRIBUTION REPORT

SERIES:  wamu 2001-ar6
                 (Exact                                 WEIGHTED nameAVERAGE ofPC theRATE:    5.70616%
POOL registrantNUMBER:  Group as1 specified= in charter)1800
____________________________________________________________________________________________
                 Delaware                (null)               (null)
               (State
AGGREGATE orLOSS other         (Commission          (IRSAMOUNTS EmployerFROM INCEPTION OF POOL
               jurisdiction  Loan of         FileCount Number)         IdentificationOf              Aggregate Loss
               Incorporation)                               Number)  Incurred Loss                  Amount
__________________         _________________

                                   75                 0                     $0.00
*Aggregate NORTHLoss FAIRWAYAmount DRIVE
                                   VERNONand HILLS,Count IL  60061do not include this month's activity

                         (Address
SUMMARY ofOF principalDISTRIBUTIONS executiveFOR offices)CURRENT CYCLE
     Principal          Scheduled         Interest        Net Interest                            Total
                    Registrant's   Distribution       Interest telephone numberDue       Adjustment       Distribution         Other          Distribution
__________________  ________________  ________________  ________________  ________________  ________________

    $25,444,386.56     $1,003,979.56             $0.00     $1,003,979.56             $0.00    $26,448,366.12


INSURANCE includingRESERVES
                         Original         Claims areaIn          Claims           Coverage          Coverage
  Insurance code:Type         Balance          Progress            Paid           Adjustments        Remaining
___________________  ________________  ________________  ________________  ________________  ________________
                                      (847)
MPI                             $0.00             $0.00             $0.00             $0.00             $0.00
Special 549Hazard         $13,012,306.00             $0.00             $0.00             $0.00    $13,012,306.00
Bankruptcy Bond
   Single-6500Units           $100,000.00             $0.00             $0.00             $0.00       $100,000.00
   Multi-Units                  $0.00             $0.00             $0.00             $0.00             $0.00
Mortgage Repurchase    $16,296,854.00             $0.00             $0.00             $0.00    $16,296,854.00

ITEM
DELINQUENT 5INSTALLMENTS
ONE                          TWO                          THREE
Count  Principal Balance     Count  Principal Balance     Count  Principal Balance
_____  _________________     _____  _________________     _____  _________________

    4      $3,539,092.22         1        $851,877.81         1        $826,015.20

FOUR                         IN FORECLOSURE               ACQUIRED
Count  Principal Balance     SeeCount  Principal ExhibitBalance     Count  Principal 99Balance
_____  _________________     _____  _________________     _____  _________________
    1        $826,015.20         0              $0.00         0              $0.00



The theClass DistributionPrincipal ReportBalances forof theeach MonthClass of Januarythe Class B1, 2002B2,
attached hereto.

ITEMB3, 7.

    FINANCIALB4, STATEMENTSB5, PROB6
Certificates FORMAimmediately FINANCIALafter INFORMATION,the ANDprincipal EXHIBITSand interest distribution on
05/25/2003 are as follows:


     EXHIBITS:

     A                Class       Class Principal Balance
                B1                 $7,247,992.   Washington50
                B2                 $4,739,387.85
                B3                 $2,787,794.69
                B4                 $1,114,707.30
                B5                   $557,011.51
                B6                 $1,674,865.26
                              __________________
                Total             $18,121,759.10
                              ==================


Capitalized Mutualitems Mortgageused Securitiesbut Corp.,not Mortgagedefined Pass-Throughherein Certificates,
          SERIES:  2001-ar6  ,have Monthlythe Distributionmeanings Reportascribed forto
them Januaryin 2002the Prospectus Supplement.

                                SIGNATURES

Pursuant

                                                                           EXHIBIT to99

                  DELINQUENT* theMORTGAGE requirementsLOANS (As of theApril Securities30, Exchange2003):

SERIES:  2001-ar6               POOL ActNUMBER:  Group of1 1934,= the1800
registrant
                           I                     II                      III
                     Total hasLoans dulyIn        Total causedDelinquent        Loans thisDelinquent
                     Mortgage reportPool              Loans                  1 toMonth
                  --------------------   ---------------------   ---------------------

Dollar beAmount:       $185,656,248.44**        $4,390,970.03***        $3,539,092.22***
Number:                         1298                      5                       4
% signedof onPool:                    100.00%                  2.37%                   1.91%
(Dollars)
% itsof behalfPool:                    100.00%                  0.39%                   0.31%
(No. byof theLoans)
undersigned

                           IV                      V                      VI
                    Loans hereuntoDelinquent        Loans dulyDelinquent           Loans authorized.In
                        2 Month                 3 Month               Foreclosure
Dated:    January                  --------------------   ---------------------   ---------------------

Dollar 23Amount:          $851, 2002877.81***                $0.00***                $0.00***
Number:                           1                       0                       0
                                  WASHINGTON% MUTUALof MORTGAGEPool:                    0.46%                    0.00%                   0.00%
(Dollars)
% SECURITIESof CORPPool:                    0.08%                    0.00%                   0.00%
                                              (RegistrantNo. of Loans)

                                              By:
                                                                              VII
                     Loans Acquired
                  --------------------
                                                    RICHIE
Dollar MOOREAmount:                $0.00***
                                                    SECONDNumber:                           0
% VICEof PRESIDENTPool:                     0.00%
(Dollars)
% of Pool:                     0.00%
(No. of Loans)

*  A Mortgage Loan is considered delinquent in a given month when a payment
due on the first day of the prior month has not been made on or before the
first day of such prior month.

**  Reflects the outstanding principal balance of the Mortgage Pool after the
application of all May 01, 2003 scheduled payments and April 01, 2003
unscheduled payments on the mortgage loans.

***  Reflects outstanding principal balance of delinquent mortgage loans as of
April 30, 2003.

Trading Factor, calculated as of distribution date : 0.22784305.
By multiplying this factor by the original balance of the Mortgage Pool as of
the Cut-Off Date, current outstanding balance of the Mortgage Pool (after
application of scheduled payments up to and including May 01, 2003, and
unscheduled prepayments in months prior to May ) can be calculated.
Filing Compare · WAMU MORTGAGE PASS THRU CERTIFICATE SERIES 2001-AR6
