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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 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 to Commission file number 1-11356 radian RADIAN GROUP INC . ( Exact name of registrant as specified in its charter ) Large Accelerated Filer Delaware ( State or other jurisdiction of incorporation or organization ) 1500 Market Street , Philadelphia , PA ( Address of principal executive offices ) 23-2691170 ( I.R.S. Employer Identification No. ) ( 215 ) 231-1000 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . Name of each exchange on which registered New York Stock Exchange RDN Title of each class Common Stock , $ .001 par value per share 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 . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . 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 Yes x No o Yes o No x 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 x No o 19102 ( Zip Code ) 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 . ( Check One ) : Non - Accelerated Filer o Smaller Reporting Company Company Emerging Growth Accelerated Filer o 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 . o DOCUMENTS INCORPORATED BY REFERENCE Definitive Proxy Statement for the Registrant's 2021 Annual Meeting of Stockholders 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 . x Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No x As of June 30 , 2020 , the aggregate market value of the registrant's common stock held by non - affiliates of the registrant was $ 2,958,053,939 based on the closing sale price as reported on the New York Stock Exchange . Excluded from this amount is the value of all shares beneficially owned by executive officers and directors of the registrant . These exclusions should not be deemed to constitute a representation or acknowledgment that any such individual is , in fact , an affiliate of the registrant or that there are not other persons or entities who may be deemed to be affiliates of the registrant . The number of shares of common stock , $ 0.001 par value per share , of the registrant outstanding on February 24 , 2021 was 191,688,864 shares . Form 10 - K Reference Document Part III ( Items 10 through 14 )