CMS Energy Corporation

Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year. On 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.

Item 5.07. Submission of Matters to a Vote of Security Holders. CMS 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. 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 13,820,318 Garrick J. Rochow 251,112,883 19,377,836 216,903 13,820,318 John G. Russell 246,721,469 23,772,778 213,375 13,820,318 Suzanne F. Shank 267,923,065 2,575,335 209,222 13,820,318 Myrna M. Soto 250,164,278 20,328,365 214,979 13,820,318 John G. Sznewajs 259,536,874 10,955,016 215,732 13,820,318 Ronald J. Tanski 265,603,191 4,889,866 214,565 13,820,318 Laura H. Wright 246,189,708 24,303,411 214,503 13,820,318 Non-binding advisory proposal to approve the compensation paid to CMS Energy’s named executive officers, as disclosed in its proxy statement pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the compensation tables and the related narrative disclosure, was approved, with a vote as follows: Number of Votes: FOR AGAINST ABSTAIN BROKER NON-VOTE ───────────────────────────────────────────────────────────────────────────────────────────────────────────── 250,583,557 19,690,248 433,817 13,820,318 Proposal to ratify the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm to audit CMS Energy’s financial statements for the year ending December 31, 2026 was approved, with a vote as follows: ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── Number of Votes: FOR AGAINST ABSTAIN ─────────────────────────────────────────────────────────────────────────────── 266,522,614 17,797,090 208,236 Proposal to amend the CMS Energy Restated Articles of Incorporation Increasing the Number of Authorized Shares of CMS Common Stock from 350 Million Shares to 700 Million Shares was approved with a vote as follows: Number of Votes: FOR AGAINST ABSTAIN ─────────────────────────────────────────────────────────────────────────────── 272,315,602 11,905,432 306,906 Proposal to amend the CMS Energy Restated Articles of Incorporation to Allow Shareholders to Call a Special Meeting was approved, with a vote as follows: Number of Votes: FOR AGAINST ABSTAIN BROKER NON-VOTE ──────────────────────────────────────────────────────────────────────────────────────────────────────────── 263,191,924 7,285,900 229,798 13,820,318 Shareholder Proposal: Shareholder Right to Act by Written Consent did not receive the majority of votes, with a vote as follows: Number of Votes: FOR AGAINST ABSTAIN BROKER NON-VOTE ───────────────────────────────────────────────────────────────────────────────────────────────────────────── 97,341,575 172,764,095 601,952 13,820,318 CONSUMERS ENERGY COMPANY At the concurrent Consumers Energy Company (“Consumers Energy”) 2026 annual meeting of shareholders, the shareholders of Consumers Energy voted upon the proposals as described in its proxy statement dated March 26, 2026. The results of the shareholder votes are as follows. Proposal to elect members to the Consumers Energy Board of Directors. All of the nominees were elected with the votes for individual nominees as follows: Number of Votes: FOR WITHHOLD BROKER NON-VOTE Deborah H. Butler 84,179,961 12,401 158,125 Ralph Izzo 84,184,068 8,294 158,125 Richard P. Keyes 84,182,276 10,086 158,125 Diane Leopold 84,181,238 11,124 158,125 Garrick J. Rochow 84,183,024 9,338 158,125 John G. Russell 84,183,043 9,319 158,125 Suzanne F. Shank 84,180,320 12,042 158,125 Myrna M. Soto 84,179,668 12,694 158,125 John G. Sznewajs 84,182,967 9,395 158,125 Ronald J. Tanski 84,183,489 8,873 158,125 Laura H. Wright 84,179,964 12,398 158,125 Non-binding advisory proposal to approve the compensation paid to Consumers Energy’s named executive officers, as disclosed in its proxy statement pursuant to the compensation disclosure rules of the Securities and Exchange Commission, including the Compensation Discussion and Analysis, the compensation tables and the related narrative disclosure, was approved, with a vote as follows: Number of Votes: FOR AGAINST ABSTAIN BROKER NON-VOTE ─────────────────────────────────────────────────────────────────────────────────────────────────── 84,170,833 14,625 6,904 158,125 Proposal to ratify the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm to audit Consumers Energy’s financial statements for the year ending December 31, 2026 was approved, with a vote as follows: ──────────────────────────────────────────────────────────────────────────────────────────────── Number of Votes: FOR AGAINST ABSTAIN ──────────────────────────────────────────────────────────────────────── 84,334,313 13,542 2,632