DTE ENERGY CO

Regulatory Filings • Dec 8, 2025

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 02, 2025

C ommission File Number: 1-11607

DTE Energy Co mpany

Michigan	38-3217752
(State or other jurisdiction of incorporation or organization)	(I.R.S Employer Identification No.)

Registrants address of principal executive offices: One Energy Plaza , Detroit , Michigan 48226-1221

Registrants telephone number, including area code: ( 313 ) 235-4000

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 Exchange on which Registered
Common stock, without par value	DTE	New York Stock Exchange
2017 Series E 5.25% Junior Subordinated Debentures due 2077	DTW	New York Stock Exchange
2020 Series G 4.375% Junior Subordinated Debentures due 2080	DTB	New York Stock Exchange
2021 Series E 4.375% Junior Subordinated Debentures due 2081	DTG	New York Stock Exchange
2025 Series H 6.25% Junior Subordinated Debentures due 2085	DTK	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 under the Securities Act (17 CFR 230.405) or Rule 12b-2 under Exchange Act (17 CFR 240.12b-2).

Emerging growth 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. ☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

On December 2, 2025, Mark W. Stiers, President and Chief Operating Officer – DTE Vantage and Energy Trading, notified DTE Energy Company (the Company) that he will retire from his position effective January 12, 2026. Mr. Stiers will remain employed by the Company in an advisory role until he ends employment with the Company no later than March 31, 2026.

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

On December 3, 2025, the Board of Directors of the Company adopted amendments to the Bylaws of the Company, effective December 3, 2025, to establish the requirements for shareholders to bring matters of business before the Company's annual shareholder meeting, including nomination of a candidate for the Board of Directors. The Bylaws amendments also clarify the Board's authority to determine that the annual shareholder meeting may be held by means of remote communication, and make other minor corrections and edits.

The description of the amendments to the Bylaws is qualified in its entirety by reference to the text of the Bylaws filed as Exhibit 3.1 to this report.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

3.1	Amended Bylaws of DTE Energy Company, as amended through December 3, 2025.
104	Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on their behalf by the undersigned hereunto duly authorized.

Date: December 8, 2025
DTE ENERGY COMPANY (Registrant)
/s/Lisa A. Muschong
Lisa A. Muschong
Vice President, Corporate Secretary and Chief of Staff