Wamu Mortgage Pass Through Certs Ser 2003-S9 – ‘10-K’ for 12/31/04

On:  Tuesday, 3/29/05, at 8:44pm ET   ·   As of:  3/30/05   ·   For:  12/31/04   ·   Accession #:  1277277-5-411   ·   File #:  333-103345-22

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Annual Report   —   Form 10-K
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                          5±    26K 
 2: EX-31       Certification per Sarbanes-Oxley Act (Section 302)     2      7K 
 3: EX-99.1     Miscellaneous Exhibit                                  1      6K 

10-K   —   Annual Report
Document Table of Contents

10-K
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 UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 Form 10-K

[X]  Annual report pursuant to Section 13 or 15(d) of the Securities Exchange   
Act of 1934 for the fiscal year ended December 31, 2004               

[    ] Transition report pursuant to Section 13 or 15(d) of the Securities      
Exchange Act of 1934                                                  

for the transition period from       to                               

Commission File Number 333-103345-22                

 WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
(Exact name of Registrant as specified in its charter)

Delaware                            94-2528990        
(State or other jurisdiction of    (I.R.S. Employer Identification No.)       
incorporation                                               

 1201 THIRD AVENUE, WMT 1706
 SEATTLE, WASHINGTON 98101
(206) 377-8555
(Address, including zip code, and telephone number, including area  
          code, of registrant's principal executive offices)

 WAMU MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 2003-S9

--------------------------------------------------------------------- 
(Title of each class of securities covered by this Form)

Securities registered pursuant to Section 12(b) of the Act: None                
Securities registered pursuant to Section 12(g) of the Act: None                

 Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of   
1934 during the preceding 12 months (or for such shorter period that the        
registrant was required to file such reports), and (2) has been subject to such 
filing requirements for the past 90 days. Yes [X] No [ ] (as such reporting     
obligations are modified as set forth in J.P. Morgan Mortgage Pass-Through      
Corporation, SEC No-Action Letter, March 31, 1989, in reliance upon which the   
registrant is filing this modified report).                                     

    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements   
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ] Not applicable.                                                  

     State the aggregate market value of the voting and non-voting common equity
held by non-affiliates of the registrant: None.                                 

Indicate the number of shares outstanding of each of the registrant's 
classes of common stock, as of the latest practicable date: Not applicable.     

 DOCUMENTS INCORPORATED BY REFERENCE

The registrant's Reports on Form 8-K concerning the registrant's                
WAMU MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 2003-S9, issued pursuant to the 
Pooling and Servicing Agreement dated as of September 1, 2003(the "Pooling      
Agreement") and registered pursuant to a registration statement on Form S-3     
(File No. 333-103345) (such mortgage pass-through certificates, the             
"Certificates"), are incorporated by reference as set forth in Part IV, Item 15.
Capitalized terms used herein but not otherwise defined shall have the meanings 
assigned to them in the Pooling Agreement.                                      

Part I

Item 1. Business.                                                               

Not applicable.                                                       

Item 2. Properties.                                                             

    Information regarding the mortgaged properties related to the Certificates
is furnished by reference to the Annual Statement of Compliance attached hereto 
as Exhibit 99.1.                                                                

Item 3. Legal Proceedings.                                                      

    There are no material pending legal proceedings with respect to the assets
of the Trust involving the registrant or, to the best knowledge of the          
registrant, the Trustee, any Custodian, any Servicer or the assets of the Trust,
other than ordinary routine litigation incidental to the Trustee's, any         
Custodian's, any Servicer's or the registrant's duties under the Pooling        
Agreement.                                                                      

Item 4. Submission of Matters to a Vote of Security Holders.                    

Not applicable.                                                                 

 Part II

Item 5. Market for Registrant's Common Equity and Related Stockholder Matters.  

    (a) To the knowledge of the registrant, there exists no established public
trading market for the Certificates.                                            

     (b) The Certificates are represented by one or more certificates registered
in the name of Cede & Co., as nominee of the Depository Trust Company ("DTC")   
and are held in book-entry form only. The registrant considers Cede & Co. to be 
the sole holder of record of the Certificates.                                  

(c) Not applicable.                                                   

Item 6. Selected Financial Data.                                                

Not applicable.                                               

Item 7. Management's Discussion and Analysis of Financial Condition and Results 
of Operations.                                                                  

Not applicable.                                                       

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.            

Not applicable.                                                       

Item 8. Financial Statements and Supplementary Data.                            

Not applicable.                                                       

Item 9. Changes in and Disagreements with Accountants on Accounting and         
Financial Disclosure.                                                           

None.                                                         

Part III

Item 10. Directors and Executive Officers of the Registrant.                    

Not applicable.                                                       

Item 11. Executive Compensation.                                                

Not applicable.                                                       

Item 12. Security Ownership of Certain Beneficial Owners and Management.        

Not applicable.                                                       

Item 13. Certain Relationships and Related Transactions.                        

Not applicable.                                                       

Item 14. Principal Accountant Fees and Services.                                

Not applicable.                                                       

 Part IV

Item 15. Exhibits and Financial Statement Schedules                             

(a) Documents filed as part of this report.                                     

1. Not applicable.                                                    

2. Not applicable.                                                    

3. Not applicable.                                                    

(b) Exhibits required by Item 601                                               

Exhibit No.             Description                                             

31                      Rule 13a-14(d) Certification                            

99.1                    Officer's Certificate regarding                         
 Annual Statement of Compliance of
Washington Mutual Mortgage      
 Securities Corp., dated March 28,
2005                            

99.2                    Independent Accountants' Report on Management's         
                      Assertion Concerning Compliance with Washington Mutual
                       Mortgage Securities Corp.'s Minimum Servicing Standards
              as of and for the year ended December 31, 2004
                    (incorporated by reference to the designated exhibit
                        included in the registrant's Current Report on Form 8-K,
                   filed on March 28, 2005, (SEC File No. 333-103345))

The registrant filed Current Reports on Form 8-K that described       
distributions made to Certificateholders on the Distribution Date occurring in  
the month preceding the month in which such Current Report on Form 8-K was filed
and also provided certain information regarding delinquent Mortgage Loans and   
credit enhancements as of such Distribution Date. Such Current Reports on Form  
8-K are incorporated by reference herein, as follows:                           

WAMU MORTGAGE PASS-THROUGH CERTIFICATES, SERIES                                 
2003-S9                                                                         

EVENT REPORTED                                                                  
Monthly Distribution Report sent to                                             
holders of the Certificates for           Date Distribution Report              
payments made in:                         Filed on Form 8-K:                    
-----------------                         ------------------                    

December 2003                             January 7, 2004                       
January 2004                              February 4, 2004                      
February 2004                             March 3, 2004                         
March 2004                                April 5, 2004                         
April 2004                                May 4, 2004                           
May 2004                                  June 4, 2004                          
June 2004                                 July 2, 2004                          
July 2004                                 July 30, 2004                         
August 2004                               August 27, 2004                       
September 2004                            September 29, 2004                    
October 2004                              October 27, 2004                      
November 2004                             November 30, 2004                     
December 2004                             December 29, 2004                     

10-K
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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities 
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.                       

Dated:  March 29, 2005         WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.      

 By: /s/ Thomas G. Lehmann
                     -------------------------------------
 Thomas G. Lehmann

Dates Referenced Herein   and   Documents Incorporated by Reference

				Referenced-On Page
This ‘10-K’ Filing		Date		First		Last			Other Filings
Filed as of:		3/30/05
Filed on:		3/29/05		2
		3/28/05		1
For Period End:		12/31/04		1
		12/29/04		1					8-K
		11/30/04		1					8-K
		10/27/04		1					8-K
		9/29/04		1					8-K
		8/27/04		1					8-K
		7/30/04		1					8-K
		7/2/04		1					8-K
		6/4/04		1					8-K
		5/4/04		1					8-K
		4/5/04		1					8-K
		3/3/04		1					8-K
		2/4/04		1					8-K
		1/7/04		1					8-K
		9/1/03		1
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