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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , DC 20549 Form 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from PennyMac Mortgage Investment Trust ( Exact name of registrant as specified in its charter ) Maryland ( State or other jurisdiction of incorporation or organization ) to Commission file number : 001-34416 3043 Townsgate Road , Westlake Village , California ( Address of principal executive offices ) ( 818 ) 224-7442 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) PMT PMT / PA Title of Each Class Common Shares of Beneficial Interest , $ 0.01 Par Value 8.125 % Series A Fixed - to - Floating Rate Cumulative Redeemable Preferred Shares of Beneficial Interest , $ 0.01 Par Value 8.00 % Series B Fixed - to - Floating Rate Cumulative Redeemable Preferred Shares of Beneficial Interest , $ 0.01 Par Value PMT / PB 27-0186273 ( IRS Employer Identification No. ) 91361 ( Zip Code ) Name of Each Exchange on Which Registered New York Stock Exchange New York Stock Exchange New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None No No > Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > 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 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 No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company or an emerging growth company . See the definitions of " large accelerated filer " , " accelerated filer " , " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act : Large accelerated filer Accelerated filer Non - accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No > As of June 30 , 2020 the aggregate market value of the registrant's common shares of beneficial interest , $ 0.01 par value ( " common shares ” ) , held by nonaffiliates was $ 1,708,609,552 based on the closing price as reported on the New York Stock Exchange on that date . As of February 24 , 2021 , there were 97,902,783 common shares of the registrant outstanding . Documents Incorporated By Reference Definitive Proxy Statement for 2020 Annual Meeting of Shareholders Document ■ 0 Parts Into Which Incorporated Part III