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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 Delaware ( State or other jurisdiction of incorporation or organization ) 14160 Dallas Parkway , Suite 300 Dallas , Texas ( Address of principal executive offices ) Large accelerated filer Non - accelerated filer Capital Senior Living Corporation ( Exact name of registrant as specified in its charter ) Commission file number : 1-13445 Title of each class Common Stock , $ .01 par value per share SENIOR LIVING Registrant's telephone number , including area code : ( 972 ) 770-5600 ✓ Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) CSU 75-2678809 ( I.R.S. Employer Identification No. ) 75254 ( Zip Code ) Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by a check mark if the registrant is a well - known seasoned issuer , as defined by Rule 405 of the Securities Act . Yes Indicate by a 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 No No ✔ Name of each exchange on which registered New York Stock Exchange Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted to Rule 405 of Regulation S - T 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 . 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 . Yes No ✔ ✔ 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 . Yes No Indicate by a 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 the 2,090,169 shares , as adjusted for the fifteen - for - one reverse stock split , of the Registrant's common stock , par value $ 0.01 per share ( " Common Stock " ) , held by non - affiliates ( defined to exclude all of the Registrant's executive officers , directors , and certain significant stockholders ) on June 30 , 2020 , the last day of the Registrant's most recently completed second quarter , based upon the adjusted closing price of the Registrant's Common Stock as reported by the New York Stock Exchange on such date was approximately $ 22.3 million . As of March 25 , 2021 , the Registrant had 2,081,332 shares of Common Stock outstanding as adjusted for the reverse stock split . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive proxy statement pertaining to its 2021 Annual Meeting of Stockholders and filed or to be filed not later than 120 days after the end of the fiscal year pursuant to Regulation 14A are incorporated herein by reference into Part III of this report .