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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 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 Transition Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 Commission file number 001-31539 Delaware ( State or other jurisdiction of incorporation or organization ) or SM ENERGY COMPANY ( Exact name of registrant as specified in its charter ) 1775 Sherman Street , Suite 1200 , Denver , Colorado ( Address of principal executive offices ) Title of each class Common stock , $ .01 par value ( 303 ) 861-8140 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) SM Securities registered pursuant to Section 12 ( g ) of the Act : None 41-0518430 ( I.R.S. Employer Identification No. ) 80203 ( Zip Code ) Name of each exchange on which registered New York Stock Exchange Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No 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 No 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 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 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 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 . Large accelerated filer Non - accelerated filer 1 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 Act ) . Yes No The aggregate market value of the 111,761,892 shares of voting stock held by non - affiliates of the registrant , based upon the closing sale price of the registrant's common stock on June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , of $ 3.75 per share , as reported on the New York Stock Exchange , was $ 419,107,095 . Shares of common stock held by each director and executive officer and by each person who owns 10 percent or more of the outstanding common stock or who is otherwise believed by the registrant to be in a control position have been excluded . This determination of affiliate status is not necessarily a conclusive determination for other purposes . As of February 4 , 2021 , the registrant had 114,742,304 shares of common stock outstanding . DOCUMENTS INCORPORATED BY REFERENCE Certain information required by Items 10 , 11 , 12 , 13 , and 14 of Part III of this report is incorporated by reference from portions of the registrant's Definitive Proxy Statement on Schedule 14A relating to its 2021 annual meeting of stockholders , to be filed within 120 days after December 31 , 2020 .