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Table of Contents 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 TENET HEALTHCARE CORPORATION ( Exact name of Registrant as specified in its charter ) Nevada ( State of Incorporation ) Commission File Number 1-7293 Title of each class Common stock , $ 0.05 par value 6.875 % Senior Notes due 2031 14201 Dallas Parkway Dallas , TX 75254 ( Address of principal executive offices , including zip code ) ( 469 ) 893-2200 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading symbol THC THC31 ( IRS Employer Identification No. ) 95-2557091 Name of each exchange on which registered New York Stock Exchange New York Stock Exchange 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 x No " Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Act . Yes " No x Indicate by check mark whether the Registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Exchange Act during the preceding 12 months , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes x No Accelerated filer " 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 during the preceding 12 months . Yes x 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 ( each as defined in Exchange Act Rule 12b - 2 ) . Large accelerated filer X Indicate by check mark whether the Registrant is a shell company ( as defined in Exchange Act Rule 12b - 2 ) . Yes No x Non - 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 . x As of June 30 , 2020 , the aggregate market value of the shares of common stock held by non - affiliates of the Registrant ( treating directors , executive officers who were SEC reporting persons , and holders of 10 % or more of the common stock outstanding as of that date , for this purpose , as affiliates ) was approximately $ 1.1 billion based on the closing price of the Registrant's shares on the New York Stock Exchange on that day . As of January 31 , 2021 , there were 106,196,295 shares of common stock outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive proxy statement for the 2021 annual meeting of shareholders are incorporated by reference into Part III of this Form 10 - K .