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Table of Contents □ 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 1-9513 1-5611 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 CMS Energy Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class CMS Energy Corporation Common Stock , $ 0.01 par value CMS Energy Corporation 5.625 % Junior Subordinated Notes due 2078 CMS Energy Corporation 5.875 % Junior Subordinated Notes due 2078 CMS Energy Corporation 5.875 % Junior Subordinated Notes due 2079 Consumers Energy Company Cumulative Preferred Stock , $ 100 par value : $ 4.50 Series Securities registered pursuant to Section 12 ( g ) of the Act : Corporation : UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K Large accelerated filer Non - accelerated filer Accelerated filer Smaller reporting company Emerging growth CMS Energy Corporation : CMS Energy Registrant ; State of Incorporation ; Address ; and Telephone Number CMS ENERGY CORPORATION None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . CMS Energy Consumers Energy Company : Yes Yes No □ Corporation : Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . CMS Energy Consumers Energy Company : Yes No 区 Yes □ No > Corporation : 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 . ( A Michigan Corporation ) One Energy Plaza , Jackson , Michigan 49201 ( 517 ) 788-0550 Corporation : CONSUMERS ENERGY COMPANY ( A Michigan Corporation ) One Energy Plaza , Jackson , Michigan 49201 ( 517 ) 788-0550 0 0 0 CMS Energy Yes No Yes NO Corporation : 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 ) . CMS Energy Consumers Energy Company : Yes NO □ Yes No Corporation : 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 . 0 Corporation : Trading Symbol ( s ) CMS CMSA CMSC CMSD CMS - PB Consumers Energy Company : Consumers Energy Company : Large accelerated filer Non - accelerated filer Accelerated filer Smaller reporting company Emerging growth company 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 . Consumers Energy Company : IRS Employer Identification No. Name of each exchange on which registered New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange Consumers Energy Company : 0 0 0 Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . CMS Energy Consumers Energy Company : 38-2726431 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 . 38-0442310 Yes Yes No > The aggregate market value of CMS Energy voting and non - voting common equity held by non - affiliates was $ 16.647 billion for the 284,957,910 CMS Energy Corporation Common Stock shares outstanding on June 30 , 2020 based on the closing sale price of $ 58.42 for CMS Energy Corporation Common Stock , as reported by the New York Stock Exchange on such date . There were no shares of Consumers common equity held by non - affiliates as of June 30 , 2020 . No There were 288,943,354 shares of CMS Energy Corporation Common Stock outstanding on January 15 , 2021. On January 15 , 2021 , CMS Energy held all 84,108,789 outstanding shares of common stock of Consumers .