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M 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 OR 15 ( d ) OF HE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number : 1-3754 ALLY FINANCIAL INC . ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) Securities registered pursuant to Section 12 ( b ) of the Act : Ally Detroit Center 500 Woodward Ave. Floor 10 , Detroit , Michigan 48226 ( Address of principal executive offices ) ( Zip Code ) ( 866 ) 710-4623 ( Registrant's telephone number , including area code ) Trading Symbol ( s ) . ALLY ALLY PRA 38-0572512 ( I.R.S. Employer Identification No. ) Title of each class Common Stock , par value $ 0.01 per share 8.125 % Fixed Rate / Floating Rate Trust Preferred Securities , Series 2 of GMAC Capital Trust I 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 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 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 Non - accelerated filer Name of each exchange on which registered NYSE NYSE 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 1 Smaller reporting company Emerging growth company 0 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 aggregate market value of the Registrant's common stock ( Common Stock ) held on June 30 , 2020 by non - affiliated entities was approximately $ 7.4 billion ( based on the June 30 , 2020 closing price of Common Stock of $ 19.83 per share as reported on the New York Stock Exchange ) . At February 22 , 2021 , the number of shares outstanding of the Registrant's common stock was 374,011,518 shares . Documents incorporated by reference : portions of the Registrant's Proxy Statement for the annual meeting of stockholders to be held on May 4 , 2021 , are incorporated by reference in this Form 10 - K in response to Items 10 , 11 , 12 , 13 , and 14 of Part III .