As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 3/28/08  Washington Mutual Mtge … 2007-OA3 10-K       12/31/07   17:508K                                   Kelly Cecelia Anne/FA    
  1/4/08‡ Washington Mutual Mtge … 2007-OA3 15-15D       1/4/08    1:13K                                    Kelly Cecelia Anne/FA    
 12/4/07  Washington Mutual Mtge … 2007-OA3 10-D       11/25/07    2:471K                                   Moody Amanda B/FA        
 11/5/07  Washington Mutual Mtge … 2007-OA3 10-D       10/25/07    2:491K                                   Moody Amanda B/FA        
 10/3/07  Washington Mutual Mtge … 2007-OA3 10-D        9/25/07    2:491K                                   Moody Amanda B/FA        
  9/6/07  Washington Mutual Mtge … 2007-OA3 10-D        8/27/07    2:491K                                   Latic Selimag… Ermina/FA 
 7/31/07  Washington Mutual Mtge … 2007-OA3 10-D        7/25/07    2:491K                                   Latic Selimag… Ermina/FA 
 6/29/07  Washington Mutual Mtge … 2007-OA3 10-D        6/25/07    2:491K                                   Latic Selimag… Ermina/FA 
  6/5/07  Washington Mutual Mtge … 2007-OA3 10-D        5/25/07    2:491K                                   Latic Selimag… Ermina/FA 
  5/3/07  Washington Mutual Mtge … 2007-OA3 10-D        4/25/07    2:491K                                   Latic Selimag… Ermina/FA 
 4/12/07  Washington Mutual Mtge … 2007-OA3 8-K:9       3/28/07    5:4.4M                                   Kelly Cecelia Anne/FA    
 3/27/07  WaMu Asset Acceptance Corp.       424B5                  1:8.4M                                   Command Financial        
          Washington Mutual Mtge Pass-Through Certificates WMAL… 2007-OA3
 3/27/07  Washington Mutual Mtge … 2007-OA3 8-K:6       3/27/07    2:12M                                    Kelly Cecelia Anne/FA    
 3/27/07  WaMu Asset Acceptance Corp.       FWP                    2:2.7M Washington Mutual Mtge … 2007-OA3 Kelly Cecelia Anne/FA    
 3/27/07  WaMu Asset Acceptance Corp.       FWP                    2:2.2M Washington Mutual Mtge … 2007-OA3 Kelly Cecelia Anne/FA    
 3/27/07‡ WaMu Asset Acceptance Corp.       FWP                    1:9.3M Washington Mutual Mtge … 2007-OA3 Kelly Cecelia Anne/FA    
 3/27/07‡ WaMu Asset Acceptance Corp.       FWP                    1:6.4M Washington Mutual Mtge … 2007-OA3 Kelly Cecelia Anne/FA    

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-D	Distribution Report by an Issuer of Asset-Backed Securities — Form 10-D.
	10-K	Annual Report — Form 10-K.
	15-15D	Notice of a Suspension of Duty to File Reports — Form 15.
	424B5	Prospectus – Primary Offering or Shelf Securities – New Facts or Events.
	FWP	Prospectus – Free Writing.