Page 1

Use these links to rapidly review the document TABLE OF CONTENTS Item 8. Consolidated Financial Statements and Supplementary Data PART IV Table of Contents ( Mark One ) р 0 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 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 For the transition period from to Commission file number : 814-00939 MSC Income Fund , Inc. ( Exact Name of Registrant as Specified in Its Charter ) Maryland 45-3999996 ( I.R.S. Employer Identification No. ) ( State or Other Jurisdiction of Incorporation or Organization ) 1300 Post Oak Boulevard , 8th Floor , Houston , Texas ( Address of Principal Executive Offices ) ( 713 ) 350-6000 77056 ( Zip Code ) ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class None Trading Symbol ( s ) N / A Name of each exchange on which registered N / A Act . Securities registered pursuant to Section 12 ( g ) of the Act : Common Stock , par value $ 0.001 Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes o No þ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Yes o No þ 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 þ No o