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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31 , 2020 FORM 10 - K OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ΤΟ COMMISSION FILE NUMBER : 814-00757 FS KKR Capital Corp. ( Exact name of registrant as specified in its charter ) Maryland ( State of Incorporation ) 201 Rouse Boulevard Philadelphia , Pennsylvania ( Address of principal executive offices ) 26-1630040 ( I.R.S. Employer Identification Number ) Registrant's telephone number , including area code : ( 215 ) 495-1150 Title of each class Common Stock , par value $ 0.001 per share Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) FSK Securities registered pursuant to Section 12 ( g ) of the Act : None 19112 ( Zip Code ) Name of each exchange on which registered The New York Stock Exchange 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 and posted on its corporate Web site , if any , every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for shorter period that the registrant was required to submit and post such files ) . Yes > No. Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S - K is not contained herein , and will not be contained , to the best of Registrant's knowledge , in definitive proxy or information statements incorporated by reference in Part III of this Form 10 - K or any amendment to this Form 10 - K . Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or a smaller reporting company . See definition of " accelerated filer , " " large accelerated filer " and " smaller reporting company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large accelerated filer Non - accelerated filer 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 . The aggregate market value of common stock held by non - affiliates of the registrant ( assuming solely for the purpose of this disclosure , but without conceding , all executive officers and directors of the registrant are " affiliates " ) , as of June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , was approximately $ 1.7 billion . There were 123,755,965 shares of the registrant's common stock outstanding as of February 25 , 2021 . Documents Incorporated by Reference The contents of the amendment to this Annual Report on Form 10 - K , which will be filed with the U.S. Securities and Exchange Commission within 120 days following the end of the registrant's fiscal year , are incorporated by reference into Part III of this Annual Report on Form 10 - K .