Official announcements (8-K)

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's wordsOn November 3, 2026, CMS Energy Corporation ("CMS Energy") issued and sold $1,000,000,000 aggregate principal amount of its 6.800% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2057 (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. 333-293382) (the "Registration Statement"), a Preliminary Prospectus Supplement dated October 29, 2026 to the Prospectus dated February 11, 2026, an Issuer Free Writing Prospectus that included the final terms of the transaction, a Final Prospectus Supplement dated October 29, 2026 to the Prospectus dated …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn October 27, 2026, CMS Energy Corporation (“CMS Energy”) issued a News Release, in which it announced its 2026 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. Other than forward-looking earnings guidance, Exhibit 99.1 contains a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with accounting …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsThe information set forth in the CMS Energy News Release dated October 27, 2026, attached as Exhibit 99.1, is incorporated by reference in response to this Item 7.01. CMS Energy will hold a webcast to discuss its 2026 third quarter results and provide a business and financial outlook on October 27 at 10:00 a.m. (ET). A copy of the CMS Energy presentation is furnished as Exhibit 99.2 to this report. A webcast of the presentation will be available on the CMS Energy website, www.cmsenergy.com. In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for the …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn 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 than forward-looking earnings guidance, Exhibit 99.1 contains a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with accounting …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsThe information set forth in the CMS Energy News Release dated July 28, 2026, attached as Exhibit 99.1, is incorporated by reference in response to this Item 7.01. CMS Energy will hold a webcast to discuss its 2026 second quarter results and provide a business and financial outlook on July 28 at 10:00 a.m. (ET). A copy of the CMS Energy presentation is furnished as Exhibit 99.2 to this report. A webcast of the presentation will be available on the CMS Energy website, www.cmsenergy.com. In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for the purposes of …

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsOn June 3, 2026, CMS Energy Corporation (“CMS Energy”) announced that Rejji P. Hayes has retired from his positions as CMS Energy and Consumers Energy Company (“Consumers Energy”) executive vice president and chief financial officer, effective June 3, 2026. Srikanth (Sri) Maddipati, 43, has been appointed to succeed Hayes as CMS Energy and Consumers Energy executive vice president and chief financial officer, effective June 3, 2026. Maddipati has been with CMS Energy for 12 years, joining in 2014 as assistant treasurer. In 2016, Maddipati was elected vice president and treasurer where he was responsible for budget and planning, corporate liquidity, financing and …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsThe information set forth under Item 5.02 of this Current Report on Form 8-K is hereby incorporated in Item 7.01 by reference. Additionally, CMS Energy reaffirms, as of June 3, 2026, its guidance as provided on April 28, 2026. In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01 of this Current Report on Form 8-K, shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933. Investors and others should note that CMS Energy routinely posts important …

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's wordsIn 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 times to be determined by CMS Energy from time to time, but CMS Energy has no obligation to offer and sell any of the Shares in the Offering. Actual sales will depend on a variety of factors to be …

Changed its company rules or financial year (Item 5.03)

Changes to the company's rules or the dates of its financial year.

In the company's wordsOn May 8, 2026 and May 11, 2026, CMS Energy Corporation (“CMS Energy”) submitted to the Michigan Department of Licensing and Regulatory Affairs Certificates of Amendment to the CMS Energy Restated Articles of Incorporation. These amendments incorporate the increase in number of authorized shares of common stock and the shareholders ability to call a special meeting and were approved by the shareholders as set forth below. A copy of the amendments is attached as exhibit 3.1 and is incorporated by reference herein.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

In the company's wordsCMS ENERGY CORPORATION At the CMS Energy 2026 annual meeting of shareholders held on May 8, 2026, the shareholders of CMS Energy voted upon the proposals as described in its proxy statement dated March 26, 2026. The results of the shareholder votes are as follows. 1. Proposal to elect members to the CMS Energy Board of Directors. All of the nominees were elected with the votes for individual nominees as follows: Number of Votes: FOR AGAINST ABSTAIN BROKER NON-VOTE Deborah H. Butler 249,960,034 20,537,029 210,559 13,820,318 Ralph Izzo 268,852,301 1,640,726 214,595 13,820,318 Richard P. Keyes 269,881,299 612,128 214,195 13,820,318 Diane Leopold 269,940,244 559,566 207,812 …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn 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 than forward-looking earnings guidance, Exhibit 99.1 contains a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with accounting …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsThe information set forth in the CMS Energy News Release dated April 28, 2026, attached as Exhibit 99.1, is incorporated by reference in response to this Item 7.01. CMS Energy will hold a webcast to discuss its 2026 first quarter results and provide a business and financial outlook on April 28 at 10:00 a.m. (ET). A copy of the CMS Energy presentation is furnished as Exhibit 99.2 to this report. A webcast of the presentation will be available on the CMS Energy website, www.cmsenergy.com. In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for the purposes …

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

In the company's wordsEffective as of February 20, 2026, Diane Leopold and Richard P. Keyes have been elected to the Boards of Directors (“Boards”) of CMS Energy Corporation (“CMS Energy”) and its principal subsidiary, Consumers Energy Company (“Consumers Energy”). Leopold has been appointed to serve on the Compensation and Human Resources Committee and the Finance Committee and Keyes has been appointed to serve on the Audit Committee and Governance, Sustainability and Public Responsibility Committee of the Boards. Prior to their elections, and pursuant to CMS Energy’s and Consumers Energy’s Amended and Restated Bylaws, each of the Boards increased its authorized membership from nine to eleven …

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's wordsIn 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, Shares having an aggregate offering price of approximately $492.3 million remain available for offer and sale. The Shares may be offered and sold in amounts and at times to be determined by CMS …

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

In the company's wordsOn 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-looking earnings guidance, Exhibit 99.1 contains a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with accounting principles …

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

In the company's wordsThe information set forth in the CMS Energy News Release dated February 5, 2026, attached as Exhibit 99.1, is incorporated by reference in response to this Item 7.01. CMS Energy will hold a webcast to discuss its 2025 results and provide a business and financial outlook on February 5 at 10:00 a.m. (ET). A copy of the CMS Energy presentation is furnished as Exhibit 99.2 to this report. A webcast of the presentation will be available on the CMS Energy website, www.cmsenergy.com. In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for the purposes of Section …

Signed a major agreement (Item 1.01)

A major new contract can change what the company sells, spends or owes.

Ended a major agreement (Item 1.02)

Losing a major agreement can affect future sales or costs.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

In the company's wordsOn 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 increased from $550 million to $750 million and remains unsecured. On November 21, 2025, Consumers Energy Company (“Consumers”) amended and restated its $1.1 billion secured Revolving Credit …

Took on a major new debt or obligation (Item 2.03)

New borrowing adds to what the company owes and the interest it pays.

In the company's wordsOn 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 the Purchase Agreement (as defined herein) to purchase additional Notes, in a private offering to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). The Notes were sold under a purchase agreement …

Sold shares without a public offering (Item 3.02)

New shares spread the profit across more shares (dilution).

In the company's wordsThe information included or incorporated by reference in Item 2.03 of this Current Report on Form 8-K is incorporated by reference into this Item 3.02 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 Securities Act, and may not be …

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Change in its leaders or board (Item 5.02)

New leaders or board members can bring a change in strategy.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Shared shareholder vote results (Item 5.07)

How shareholders voted on board members and proposals.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.

Announced another event (Item 8.01)

Another event the company chose to report publicly.

Shared financial results (Item 2.02)

New results: figures on this page will update when the full quarterly or annual report is filed.

Shared information with investors (Item 7.01)

Information shared with investors, often a presentation or press release.