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( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K 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 Commission file number : 001-16577 Flagstar® Michigan ( State or other jurisdiction of incorporation or organization ) Bancorp , Inc. 5151 Corporate Drive , Troy , Michigan ( Address of principal executive offices ) Title of each class Common Stock , par value $ 0.01 per share Flagstar Bancorp , Inc. ( Exact name of registrant as specified in its charter ) Large Accelerated Filer Non - Accelerated Filer X Registrant's telephone number , including area code : ( 248 ) 312-2000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol FBC 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 > Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Act . Yes No X 38-3150651 ( I.R.S. Employer Identification No. ) Accelerated Filer Emerging growth company 48098-2639 ( Zip Code ) 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 definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Name of each exchange on which registered New York Stock Exchange No Smaller Reporting 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 Act ) . Yes No > The estimated aggregate market value of the voting common stock held by non - affiliates of the registrant , computed by reference to the closing sale price ( $ 29.43 per share ) as reported on the New York Stock Exchange on June 30 , 2020 , was approximately $ 2 billion . The registrant does not have any non - voting common equity shares . As of February 25 , 2021 , 52,679,147 shares of the registrant's common stock , $ 0.01 par value , were issued and outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Proxy Statement relating to the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report on Form 10 - K .