Option One Mortgage Loan Trust 2005-4, Asset-Backed Certificates, Series 2005-4 – ‘10-K’ for 12/31/05

On:  Monday, 3/27/06, at 6:14pm ET   ·   As of:  3/28/06   ·   For:  12/31/05   ·   Accession #:  1056404-6-1239   ·   File #:  333-126920-01

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Annual Report   —   Form 10-K
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                          9±    35K 

Document Table of Contents

           UNITED STATES
            SECURITIES AND EXCHANGE COMMISSION
            WASHINGTON, D.C. 20549

             FORM 10-K

(Mark one)                                                                  

/X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES         
EXCHANGE ACT OF 1934                                                
For the fiscal year ended December 31, 2005                         

OR                                                                  

/ / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES     
EXCHANGE ACT OF 1934                                                

Commission File Number:  333-126920                                 

Option One Mortgage Acceptance Corporation                      

(Exact name of registrant as specified in its charter)                

Delaware                                          33-0727357                
(State or other jurisdiction of                   (I.R.S. Employer          
incorporation or organization)                    Identification No.)       

3 Ada                                                                     
Irvine, CA                                  92618                         
(Address of principal executive offices)    (Zip Code)                      

Registrant's telephone number, including area code: (949) 790-3600          

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 if the registrant is a well-known seasoned issuer,   
as defined in Rule 405 of the Securities Act.                               

Yes  ___     No  X                                              

Indicate by check mark if the registrant is not required to file reports    
pursuant to Section 13 or Section 15(d) of the Act.                         

Yes  ___     No  X                                              

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  ___                                            

Indicate by check mark if disclosure of delinquent filers pursuant to       
Item 405 of Regulation S-K ( 229.405 of this chapter) 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.                                                 

Indicate by check mark whether the registrant is a large accelerated filer, 
an accelerated filer, or a non-accelerated filer. See Definition of         
"accelerated filer and large accelerated filer" in Rule 12b-2 of the        
Exchange Act. (Check One):                                                  

Large Accelerated Filer ___  Accelerated Filer ___  Non-Accelerated Filer X 

Indicate by check mark whether the registrant is a shell company (as        
defined in Rule 12b-2 of the Act).                                          

Yes  ___     No  X                                              

State the aggregate market value of the voting and non-voting common        
equity held by non-affiliates computed by reference to the price at which   
the common equity was last sold, or the average bid and asked price of      
such common equity, as of the last business day of the registrant's most    
recently completed second fiscal quarter.                                   

Not applicable.                                                 

Documents Incorporated by Reference                                   

List hereunder the following documents if incorporated by reference and     
the Part of the Form 10-K (e.g. Part I, Part II, etc.) into which the       
document is incorporated: (1)Any annual report to security holders; (2)     
Any proxy or information statement; and (3)Any prospectus filed pursuant    
to Rule 424(b) or (c) under the Securities Act of 1933. The listed          
documents should be clearly described for identification purposes (e.g.     
annual report to security holders for fiscal year ended December 24, 1980). 

Not applicable.                                                 

PART I            

Item 1.  Business.                                                          

Not applicable.                                         

Item 1A.  Risk Factors.                                                     

Not applicable.                                         

Item 1B.  Unresolved Staff Comments.                                        

Not applicable.                                         

Item 2.  Properties.                                                        

Not applicable.                                         

Item 3.  Legal Proceedings.                                                 

     The registrant knows of no material pending legal proceedings
   involving the trust created under the Pooling and Servicing
Agreement (the Trust), the Trustee, the Servicer or the 
registrant with respect to the Trust other than routine 
      litigation incidental to the duties of the respective parties.

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

None.                                                   

PART II           

Item 5.  Market for Registrant's Common Equity, Related Stockholder         
Matters and Issuer Purchases of Equity Securities.        

         No established public trading market for the Certificates exists.

Records provided to the Trust by the DTC and the Trustee
          indicate that as of December 31, 2005, the total number of holders
of record for the Series of Certificates is 45.         

Item 6.  Selected Financial Data.                                           

Not applicable.                                         

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

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.                                                   

Item 9A. Controls and Procedures.                                           
Not applicable.                                         

Item 9B. Other Information.                                                 

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     
and Related Stockholder Matters.                          

      Under the Pooling and Servicing Agreement governing the Trust,
       the holders of the Certificates generally do not have the right
        to vote and are prohibited from taking part in management of the
Trust. See Exhiit 99.4.                                 

Item 13. Certain Relationships and Related Transactions.                    

Not applicable.                                         

Item 14. Principal Accounting Fees and Services.                            

Not applicable.                                         

PART IV               

Item 15. Exhibits, Financial Statement Schedules.                           

(a) Exhibits                                                              

(31.1) Rule 13a-14(a)/15d-14(a) Certification                         

(99.1) Annual Independent Accountants' Servicing Reports concerning   
servicing activities.                                   

                                                                      [Download Table]
                                                    

                                                    
a) Option One Mortgage Corporation, as Servicer <F1>

                                                                          
(99.2) Report of Management as to Compliance with Minimum Servicing   
Standards.                                              

                                                                      [Download Table]
                                                    

                                                    
a) Option One Mortgage Corporation, as Servicer <F1>

                                                                          
(99.3) Annual Statements of Compliance under the Pooling and Servicing
Agreements.                                             

                                                                      [Download Table]
                                                    

                                                    
a) Option One Mortgage Corporation, as Servicer <F1>

                                                                          
(99.4) Aggregate Statement of Principal and Interest Distributions to 
Certificate Holders.                                    

(b) Not applicable.                                                       

(c) Omitted.                                                              

<F1> Filed herewith.                                                        

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:         

By: Option One Mortgage Acceptance Corporation, as Depositor for Option     
    One Mortgage Loan Trust 2005-4, Asset Backed Certificates, Series 2005-4
(Registrant)                                                        

By:  /s/ William L O`Neill                                                  

By: /s/ William L O`Neill, Senior Vice President                            

Dated: March 24, 2006                                                       

Exhibit Index                                                               

Exhibit No.                                                                 

Ex-31.1 Rule 13a-14(a)/15d-14(a) Certification                              

I, William L O`Neill, the senior officer of Option One Mortgage             
Acceptance Corporation, certify that:                                       

1. I have reviewed this annual report on Form 10-K, and all reports on      
Form 8-K containing distribution and servicing reports filed in       
respect of periods included in the year covered by this annual        
report, of Option One Mortgage Acceptance Corporation, Asset-Backed   
Certificates, Series 2005-4;                                          

2. Based on my knowledge, the information in these reports, taken as a      
whole, does not contain any untrue statement of a material fact or    
omit to state a material fact necessary to make the statements made,  
in light of the circumstances under which such statements were made,  
not misleading as of the last day of the period covered by this       
annual report;                                                        

3. Based on my knowledge, the distribution or servicing information         
required to be provided to the trustee by the master servicer under   
the pooling and servicing, or similar, agreement, for inclusion in    
these reports is included in these reports;                           

4. Based on my knowledge and upon the annual compliance statement           
included in the report and required to be delivered to the trustee in 
accordance with the terms of the pooling and servicing, or similar,   
agreement, and except as disclosed in the reports, the master         
servicer has fulfilled its obligations under the servicing agreement; 
and                                                                   

5. The reports disclose all significant deficiencies relating to the        
master servicer's compliance with the minimum servicing standards     
based upon the report provided by an independent public accountant,   
after conducting a review in compliance with the Uniform Single       
Attestation Program for Mortgage Bankers or similar procedure, as set 
forth in the pooling and servicing, or similar, agreement, that is    
included in these reports.                                            

In giving the certifications above, I have reasonably relied on       
information provided to me by the following unaffiliated parties:     
Wells Fargo Bank, N.A. as Trustee.                                    

Date: March 24, 2006                                                  

/s/ William L O`Neill                                                 
Signature                                                             

Senior Vice President                                                 
Title                                                                 

EX-99.1                                                                     
(logo) KPMG                                                                     

KPMG LLP                                                                        
Suite 2000                                                                      
355 South Grand Avenue                                                          
Los Angeles, CA 90071-1568                                                      

Independent Accountants' Report                                                 

The Board of Directors and Stockholder                                          
Option One Mortgage Corporation:                                                

We have examined management's assertion, included in the accompanying management
assertion, that Option One Mortgage Corporation complied with the minimum       
servicing standards set forth in the Mortgage Bankers Association of America's  
Uniform Single Attestation Program for Mortgage Bankers as of and for the year  
ended December 31, 2005. Management is responsible for Option One Mortgage      
Corporation's compliance with those minimum servicing standards. Our            
responsibility is to express an opinion on management's assertion about the     
Company's compliance based on our examination.                                  

Our examination was conducted in accordance with attestation standards          
established by the American Institute of Certified Public Accountants and,      
accordingly, including examining, on a test basis, evidence about Option One    
Mortgage Corporation's compliance with the minimum servicing standards specified
above and performing such other procedures as we considered necessary in the    
circumstances. We believe that our examination provides a reasonable basis for  
our opinion. Our examination does not provide a legal determination on Option   
One Mortgage Corporation's compliance with the minimum servicing standards.     

In our opinion, management's assertion that Option One Mortgage Corporation     
complied with the aforementioned minimum servicing standards as of and for the  
year ended December 31, 2005 is fairly stated in all material respects.         

/s/ KPMG LLP                                                                    

Los Angeles, California                                                         
February 28, 2006                                                               

KPMG LLP, a U.S. limited liability partnership, is the U.S.                     
member firm of KPMG International, a Swiss cooperative.                         

EX-99.2                                                                     
(logo) OPTION ONE                                                               
MORTGAGE                                                          
an H&R BLOCK company                                              

(logo) H&R BLOCK                                                                

Management Assertion                                                            

As of and for the year ended December 31, 2005, Option One Mortgage Corporation 
Complied in all material respects with the minimum servicing standards set forth
in the Mortgage Bankers Association of America's Uniform Single Attestation     
Program for Mortgage Bankers. As of and for this same period, Option One        
Mortgage Corporation had in effect a fidelity bond and errors and omissions     
policy in the amounts of $70,000,000 and $10,000,000, respectively.             

/s/ Robert E Dubrish                                                            
Robert E. Dubrish, Chief Executive Officer                                      

/s/ William L. O'Neill                                                          
William L. O'Neill, Chief Financial Officer                                     

/s/ Matthew A. Engel                                                            
Matthew A. Engel, Controller                                                    

/s/ Fabiola Camperi                                                             
Fabiola Camperi, Chief Servicing Officer                                        

www.optiononeonline.com                                                         

EX-99.3                                                                     
OFFICER'S CERTIFICATE                                                           

ANNUAL STATEMENT OF THE SERVICER                                                

I, Fabiola Camperi, the duly appointed Chief Servicing Officer of Option One    
Mortgage Corporation, the Servicer, hereby certify that (i) a review of the     
activities of the Servicer during the calendar year ended December 31, 2005 and 
of performance under the Servicing Agreement, as defined in the cover letter,   
has been made under my supervision, and (ii) to the best of my knowledge, based 
on such review, the Servicer has fulfilled all of its obligations under the     
Servicing Agreement during such year.                                           

By: /s/ Fabiola Camperi                                                         

Name: Fabiola Camperi                                                           
Title: Chief Servicing Officer                                                  
Date: February 28, 2006                                                         

Ex-99.4                                                                     

Schedule of Year-To-Date Principal and Interest Distributions to          
Certificateholders                                                        

                                                                   [Download Table]
                                                            

Class      Interest      Principal  Losses    Ending Balance
                                                            
A1     8,299,957.10  29,324,186.53    0.00    812,354,813.47
A2     3,024,012.58  24,545,623.71    0.00    296,454,376.29
A3     3,413,800.80           0.00    0.00    343,500,000.00
A4        68,721.02           0.00    0.00      6,758,000.00
C      4,065,528.33           0.00    0.00  1,948,692,897.38
M1       932,986.25           0.00    0.00     90,115,000.00
M10      454,297.40           0.00    0.00     30,038,000.00
M11      181,717.29           0.00    0.00     12,015,000.00
M12      302,877.28           0.00    0.00     20,026,000.00
M2     1,041,270.71           0.00    0.00    100,128,000.00
M3       314,454.68           0.00    0.00     30,038,000.00
M4       418,700.88           0.00    0.00     39,050,000.00
M5       367,380.39           0.00    0.00     34,044,000.00
M6       240,250.98           0.00    0.00     22,028,000.00
M7       310,341.02           0.00    0.00     26,033,000.00
M8       206,844.85           0.00    0.00     17,022,000.00
M9       315,839.60           0.00    0.00     24,031,000.00
P        477,252.76           0.00    0.00            100.00
R              0.00           0.00    0.00              0.00
RX             0.00           0.00    0.00              0.00
                                                                             

Dates Referenced Herein   and   Documents Incorporated by Reference

This ‘10-K’ Filing		Date		Other Filings
Filed as of:		3/28/06		None on these Dates
Filed on:		3/27/06
		3/24/06
		2/28/06
For Period End:		12/31/05
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