CMS: 8-K company filing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported) May 8, 2026 Commission Registrant; State of Incorporation; IRS Employer File Number Address; and Telephone Number Identification No. 1-9513 CMS ENERGY CORPORATION (A Michigan Corporation) One Energy Plaza Jackson , Michigan 49201 ( 517 ) 788-0550 38-2726431 1-5611 CONSUMERS ENERGY COMPANY (A Michigan Corporation) One Energy Plaza Jackson , Michigan 49201 ( 517 ) 788-0550 38-0442310 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered CMS Energy Corporation Common Stock, $0.01 par value CMS New York Stock Exchange CMS Energy Corporation 5.625% Junior Subordinated Notes due 2078 CMSA New York Stock Exchange CMS Energy Corporation 5.875% Junior Subordinated Notes due 2078 CMSC New York Stock Exchange CMS Energy Corporation 5.875% Junior Subordinated Notes due 2079 CMSD New York Stock Exchange CMS Energy Corporation, Depositary Shares , each representing a 1/1,000th interest in a share of 4.200% Cumulative Redeemable Perpetual P