Results of Operations and Financial Condition. On July 28, 2026, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2026 second quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

executive vice president and chief financial officer — Rejji P. Hayes: Hayes retired and was succeeded by Maddipati.

Other Events. In connection with the commencement of an equity offering program under which shares (the “Shares”) of the common stock of CMS Energy Corporation (“CMS Energy”) having an aggregate sales price of up to $3,000,000,000 may be offered and sold from time to time (the “Offering”), CMS Energy filed today with the Securities and Exchange Commission (the “SEC”) a prospectus supplement dated May 13, 2026 (the “Prospectus Supplement”). The Shares may be offered and sold in amounts and at…

Results of Operations and Financial Condition. On April 28, 2026, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2026 first quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

Director — Diane Leopold and Richard P. Keyes: Two new directors were elected to the Boards of CMS Energy Corporation and Consumers Energy Company.

Other Events. In connection with the continuation of an equity offering program under which shares (the “Shares”) of the common stock of CMS Energy Corporation (“CMS Energy”) having an aggregate sales price of up to $1,000,000,000 may be offered and sold from time to time (the “Offering”), CMS Energy filed today with the Securities and Exchange Commission (the “SEC”) an updated prospectus supplement dated February 11, 2026 (the “New Prospectus Supplement”). Under the New Prospectus Supplement…

Results of Operations and Financial Condition. On February 5, 2026, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2025 results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other than forward…

Other Events. On November 21, 2025, CMS Energy Corporation (“CMS Energy”) amended and restated its Revolving Credit Facility (the “CMS Facility”) with a consortium of banks led by Barclays Bank PLC (“Barclays”), as Agent, JPMorgan Chase Bank, N.A. (“JPMorgan”) and MUFG Bank, LTD. (“MUFG”), as Co-Syndication Agents, Mizuho Bank, Ltd. (“Mizuho”), Bank of America, N.A. (“Bank of America”), and Wells Fargo Bank, National Association (“Wells Fargo”) as Co-Documentation Agents. The CMS Facility was…

Entry into a Material Definitive Agreement.

Termination of a Material Definitive Agreement.

of this Current Report on Form 8-K. The Notes were sold to the Initial Purchasers in reliance on the exemption from the registration requirements provided by Section 4(a)(2) of the Securities Act for resale to persons reasonably believed to be qualified institutional buyers as defined in, and in reliance on, Rule 144A of the Securities Act. The Notes and the underlying shares of Common Stock issuable upon conversion of the Notes, if any, have not been and will not be registered under the Secu…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On November 6, 2025, CMS Energy Corporation (“CMS Energy”) completed the sale of $1,000,000,000 aggregate principal amount of 3.125% Convertible Senior Notes due 2031 (the “Notes”), which included an additional $150,000,000 aggregate principal amount of Notes purchased pursuant to the full exercise of the option granted to the Initial Purchasers (as defined herein) pursuant to th…

Other Events. On November 4, 2025, CMS Energy Corporation (“Corporation”) issued a press release announcing the pricing and upsize of a private placement of $850 million aggregate principal amount of the Corporation’s 3.125% Convertible Senior Notes due 2031 (plus the initial purchasers’ option to purchase up to an additional $150,000,000 aggregate principal amount of the Corporation’s 3.125% Convertible Senior Notes due 2031). A copy of the press release is filed as Exhibit 99.1 to this Curr…

Other Events. On November 3, 2025, CMS Energy Corporation (“CMS Energy”) issued a press release announcing the launch of a private placement of $750,000,000 principal amount of its Convertible Senior Notes due 2031. A copy of the press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Results of Operations and Financial Condition. On October 30, 2025, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2025 third quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Othe…

Results of Operations and Financial Condition. On July 31, 2025, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2025 second quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

Director — Kurt Darrow: The filing discloses the planned retirement of a long-serving director, which is a routine board change rather than a sudden executive departure.

The excerpt is a boilerplate reference to an exhibit and does not disclose a specific management change, departure, or appointment.

Results of Operations and Financial Condition. On April 24, 2025, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2025 first quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

Other Events. On February 21, 2025, CMS Energy Corporation ("CMS Energy") issued and sold $1,000,000,000 aggregate principal amount of its 6.50% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2055 (the “Notes”), pursuant to a Registration Statement on Form S-3 that CMS Energy filed with the Securities and Exchange Commission utilizing a “shelf” registration process (No. 333-270060) (the "Registration Statement"), a Preliminary Prospectus Supplement dated February 18, 2025 to the Pros…

Results of Operations and Financial Condition. On February 6, 2025, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2024 results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other than forward…

Results of Operations and Financial Condition. On October 31, 2024, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2024 third quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Othe…

Results of Operations and Financial Condition. On July 25, 2024, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2024 second quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

Results of Operations and Financial Condition. On April 25, 2024, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2024 first quarter results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other…

Results of Operations and Financial Condition. On February 1, 2024, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2023 results. Attached as Exhibit 99.1 to this report and incorporated herein by reference is a copy of the CMS Energy News Release, furnished as a part of this report. Exhibit 99.1 contains certain financial measures that are considered “non-GAAP financial measures” as defined in Securities and Exchange Commission rules. Other than forward…