UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM ABS-15G

ASSET-BACKED SECURITIZER

REPORT PURSUANT TO SECTION 15G OF

THE SECURITIES EXCHANGE ACT OF 1934

Check the appropriate box to indicate the filing obligation to which this form is intended to satisfy:

X Rule 15Ga-1 under the Exchange Act (17 CFR 240.15Ga-1) for the reporting period July 1, 2022 to December 31, 2022.

Date of Report (Date of earliest event reported): February 14, 2023

Commission File Number of securitizer:      025-01123

Central Index Key Number of securitizer:     000314643

Washington Mutual Mortgage Securities Corp.¹
(Exact name of securitizer as specified in its charter)

Eric A. Senzon, (813) 584-3951

Name and telephone number, including area code, of the person to

contact in connection with this filing.

Indicate by check mark whether the securitizer has no activity to report for the initial period pursuant to Rule 15Ga-1(c)(1) [ ]

Indicate by check mark whether the securitizer has no activity to report for the quarterly period pursuant to Rule 15Ga-1(c)(2)(i) [ ]

Indicate by check mark whether the securitizer has no activity to report for the annual period pursuant to Rule 15Ga-1(c)(2)(ii) [X]

___ Rule 15Ga-2 under the Exchange Act (17 CFR 240.15Ga-2)

¹ On December 8, 2017, Washington Mutual Mortgage Securities Corp. merged with WaMu Asset Acceptance Corp., Long Beach Securities Corp., WM Asset Holdings Corp. and WaMu Capital Corp, with Washington Mutual Mortgage Securities Corp. (“WMMSC”) being the surviving entity. WMMSC, as securitizer, is filing this Form ABS-15G in respect of all mortgage-backed securities representing interests in pools of residential mortgage loans for which it acted as depositor and which are outstanding during the reporting period.  On September 25, 2008, JPMorgan Chase Bank, National Association (“JPMCB”) acquired the banking operations of Washington Mutual Bank from the Federal Deposit Insurance Corporation (“FDIC”).  It is JPMCB’s position that certain of the repurchase obligations of Washington Mutual Bank remain with the FDIC receivership.  Assets are reported herein in accordance with Rule 15Ga-1 regardless of the validity of the demand or defenses thereto, and nothing in this report shall constitute, or be deemed, a waiver of any rights, defenses, powers or privileges of any party relating to these assets.

Central Index Key Number of depositor:

______________________________________

(Exact name of issuing entity as specified in its charter)

Central Index Key Number of issuing entity (if applicable): ____________

Central Index Key Number of underwriter (if applicable): ____________

______________________________________

Name and telephone number, including area code, of the person to

contact in connection with this filing.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the reporting entity has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: February 14, 2023	WASHINGTON MUTUAL MORTGAGE
	SECURITIES CORP.
	(Securitizer)
	By:	/s/ Camille Coles
		Name:	Camille Coles
		Title:	President