Supplemental Prospectus (Form 424B5)

This prospectus supplement and the accompanying prospectus and any free writing prospectus that we file with the Securities and Exchange Commission ("SEC") contain and incorporate by reference information you should consider when making your investment decision. We have not, and the underwriters have not, authorized any person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and the underwriters are not, making an offer to sell these junior subordinated debentures in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus supplement or the accompanying prospectus or any document incorporated by reference is accurate only as of its date. DTE Energy's business, financial condition, results of operations and prospects may have changed since such date. To the extent that the information in the prospectus supplement differs from the information in the prospectus, you should rely on the information in the prospectus supplement.

When we refer to "DTE Energy," the "Company," "we," "us," or "our" in this prospectus supplement or the accompanying prospectus or when we otherwise refer to ourselves herein or therein, we mean DTE Energy Company and its subsidiaries, unless expressly stated or the context clearly indicates otherwise.

TABLE OF CONTENTS

Prospectus Supplement

Prospectus

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WHERE YOU CAN FIND MORE INFORMATION

Available Information

We file annual, quarterly and special reports, and other information with the Securities and Exchange Commission. Our SEC filings are available to the public over the Internet at the SEC's website at http://www.sec.gov. We maintain a website at http://www.dteenergy.com, that contains information about us. The information on such website is not incorporated by reference into this prospectus supplement and you should not consider it part of this prospectus supplement.

Incorporation by Reference

The SEC allows us to "incorporate by reference" the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus supplement. The following information is incorporated by reference into this prospectus supplement:

Additionally, any reports filed by us pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, or the "Exchange Act," on or after the date of this prospectus supplement and before the completion of this offering will be deemed to be incorporated by reference into this prospectus supplement and the accompanying prospectus and will automatically update, where applicable, and supersede any information contained in this prospectus supplement or the accompanying prospectus or incorporated by reference into this prospectus supplement and the accompanying prospectus.

Each of these documents is available from the SEC's website described above. We will provide without charge to each person, including any beneficial owner, to whom a copy of this prospectus is delivered, on the written or oral request of that person, a copy of any or all of the documents incorporated in this prospectus or in any related prospectus supplement by reference, excluding the exhibits to those documents unless the exhibits are specifically incorporated by reference therein. You may make such a request by writing or telephoning DTE Energy Investor Relations at:

DTE Energy Company

Attention: Investor Relations, 1150 WCB

One Energy Plaza

Detroit, Michigan 48226-1221

(313) 235-8030

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CAUTIONARY STATEMENTS REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement, the accompanying prospectus and the documents incorporated by reference in this prospectus supplement or the accompanying prospectus contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act") and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), with respect to the financial condition, results of operations and business of DTE Energy. You can find many of these statements by looking for words such as "believes," "expects," "anticipates," "estimates," "may," "could," "projected," "aspiration," "plans," and "goals"or similar expressions in this prospectus supplement, the accompanying prospectus or the documents incorporated by reference herein or therein. You are cautioned not to place undue reliance on such statements, which speak only as of the date of this prospectus supplement, the date of the accompanying prospectus or the date of any document incorporated by reference.

These forward-looking statements are subject to numerous assumptions, risks and uncertainties. Our actual results may differ from those expected due to a number of variables as described in our public reports filed with the SEC, including our Annual Report on Form 10-K for the year ended December 31, 2025, and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, which are incorporated by reference herein.

All subsequent written and oral forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. We undertake no obligation to release publicly any revisions to the forward-looking statements to reflect events or circumstances after the date of this document or to reflect the occurrence of unanticipated events.

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RISK FACTORS

An investment in the junior subordinated debentures involves risks. In considering whether to invest in the junior subordinated debentures, you should carefully consider all of the information contained in or incorporated by reference in this prospectus supplement and the accompanying prospectus. In particular, you should consider the risk factors described in our periodic reports filed with the SEC, including those set forth under the captions "Risk Factors" and "Forward-Looking Statements" in our Annual Report on Form 10-K for the year ended December 31, 2025, and in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, which are incorporated by reference in this prospectus supplement, as well as the additional risks described below. Additional risks and uncertainties not currently known to us or those currently viewed by us to be immaterial may also materially and adversely affect us. See also "Cautionary Statements Regarding Forward-Looking Statements" in this prospectus supplement.

Risks Related to Ownership of our Junior Subordinated Debentures

Our obligations under the junior subordinated debentures are subordinated to our current and future senior indebtedness.

Our obligations under the junior subordinated debentures will be unsecured and subordinated. This means that we cannot make payments on the junior subordinated debentures if we are in default on any of our Senior Indebtedness. In the event of our bankruptcy, liquidation or dissolution, our assets must be used to pay our senior obligations in full before any payments may be made to holders of the junior subordinated debentures

In addition, because we are a holding company and our assets consist primarily of investments in our subsidiaries, payments due under the junior subordinated debentures are also effectively subordinated to all liabilities and preferred stock if any, of our subsidiaries. Our ability to service indebtedness, including the junior subordinated debentures, depends on the earnings of our subsidiaries and the distribution or other payment to us from subsidiaries of earnings in the form of dividends, loans or advances, and repayment of loans and advances from us. The subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to pay any amounts due under the junior subordinated debentures or to make payments to us in order for us to pay our obligations under the junior subordinated debentures.

As of March 31, 2026, we and our subsidiaries had consolidated long-term indebtedness of approximately $26.3 billion in aggregate principal amount, substantially all of which (except for our other junior subordinated debentures) would be effectively senior to our junior subordinated debentures. There is no limitation on the ability of us or our subsidiaries to incur additional indebtedness or other liabilities to which the junior subordinated debentures will be effectively subordinated.

The Company may elect to defer interest payments on the junior subordinated debentures at its option for one or more periods of up to 10 consecutive years. This may affect the market price of the junior subordinated debentures.

The Company may elect at its option to defer payment of all or part of the current and accrued interest otherwise due on the junior subordinated debentures for up to 10 consecutive years, as described under "Description of the Junior Subordinated Debentures-Option to Defer Interest Payments" in this Prospectus Supplement. At the end of an Optional Deferral Period, if all amounts due are paid, the Company could start a new Optional Deferral Period of up to 10 consecutive years. During any Optional Deferral Period, interest on the junior subordinated debentures would be deferred but would accrue additional interest at a rate equal to the interest rate then applicable to the junior subordinated debentures, to the extent permitted by applicable law. No Optional Deferral Period may extend beyond the maturity date or redemption date, if earlier, of the junior subordinated debentures. If the Company exercises this interest deferral right, the junior subordinated debentures may trade at a price that does not fully reflect the value of accrued but unpaid interest on the junior subordinated

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debentures or that is otherwise less than the price at which the junior subordinated debentures may have been traded if the Company had not exercised such right. In addition, as a result of the Company's right to defer interest payments, the market price of the junior subordinated debentures may be more volatile than other securities that do not have these rights.

U.S. Holders of the junior subordinated debentures may have to pay taxes on interest before they receive payments from the Company.

If the Company defers interest payments on the junior subordinated debentures, U.S. Holders (as defined under "Material U.S. Federal Income Tax Considerations") will be required to accrue and include in income for United States federal income tax purposes the accrued but unpaid interest on such U.S. Holder's junior subordinated debentures, even if such U.S. Holder normally reports income when received. As a result, a U.S. Holder will be required to include the accrued interest in such U.S. Holder's gross income for United States federal income tax purposes before receiving payment of the interest.

If a U.S. Holder sells its junior subordinated debentures before the record date for the first interest payment after an Optional Deferral Period, the accrued interest will be paid to the holder of record on the record date, and the U.S. Holder will never receive the cash from the Company related to such accrued interest that was reported for U.S. federal income tax purposes. Moreover, amounts that a selling U.S. Holder was required to include in income in respect of its junior subordinated debentures during the Optional Deferral Period will generally be added to its adjusted tax basis in its junior subordinated debentures, but that amount may not be reflected in the amount that such U.S. Holder realizes on the sale. To the extent the amount realized on a sale is less than the U.S. Holder's adjusted tax basis, such U.S. Holder will recognize a capital loss for United States federal income tax purposes. The deductibility of capital losses is subject to limitations. Holders should consult with their own tax advisors regarding the tax consequences of an investment in the junior subordinated debentures.

For more information regarding the U.S. federal income tax consequences of purchasing, holding, and disposing of the junior subordinated debentures, see "Material U.S. Federal Income Tax Considerations" in this Prospectus Supplement.

An active trading market for the junior subordinated debentures may not develop, and any such market may be illiquid.

The junior subordinated debentures constitute a new issue of securities with no established trading market. The Company does not intend to apply to list the junior subordinated debentures on any securities exchange. The liquidity of any trading market in the junior subordinated debentures which may develop, and the market prices quoted therefor, may be adversely affected by changes in the overall market for this type of security and by changes in the Company's financial performance or prospects or in the prospects for companies in the Company's industry generally. As a result, the Company cannot assure holders that an active after-market for the junior subordinated debentures will develop or be sustained or that holders of the junior subordinated debentures will be able to sell their junior subordinated debentures at favorable prices or at all.

Rating agencies may change their practices for rating the junior subordinated debentures, which change may affect the market price of the junior subordinated debentures. In addition, the Company may redeem the junior subordinated debentures if a rating agency makes certain changes in the equity credit methodology for securities such as the junior subordinated debentures.

The rating agencies that currently or may in the future publish a rating for the Company, including Moody's Investors Service, Inc., S&P Global Ratings, a division of S&P Global, Inc. and Fitch Ratings, Inc., may, from time to time in the future, change the way they analyze securities with features similar to the junior subordinated debentures. This may include, for example, changes to the relationship between ratings assigned to an issuer's senior securities and ratings assigned to securities with features similar to the junior subordinated debentures. If

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the rating agencies change their practices for rating these types of securities in the future, and the ratings of the junior subordinated debentures are subsequently lowered, that could have a negative impact on the trading price of the junior subordinated debentures. In addition, the Company may redeem the junior subordinated debentures at its option, in whole, but not in part, if a rating agency makes certain changes in the equity credit methodology for securities such as the junior subordinated debentures. See "Description of the Junior Subordinated Debentures-Right to Redeem Upon a Rating Agency Event" in this Prospectus Supplement.

While it is not possible for the interest rate on the junior subordinated debentures to decrease below the initial interest rate, the interest rate on the junior subordinated debentures may fluctuate over time.

The interest rate on the junior subordinated debentures from their original issue date to, but excluding, July 1, 2033 will be    % per annum. Beginning on July 1, 2033, the interest rate on the junior subordinated debentures for each Interest Reset Period will equal the Five-Year Treasury Rate as of the most recent Reset Interest Determination Date plus a spread of    %, to be reset on each Interest Reset Date; provided, that the interest rate during any Interest Reset Period will not reset below    %. Accordingly, while it is not possible for the interest rate on the junior subordinated debentures to decrease below the initial interest rate, the interest rate for a given Interest Reset Period subsequent to the initial Interest Reset Period may decrease as compared to the interest rate for the prior Interest Reset Period. The Company has no control over the factors that may affect U.S. Treasury rates, including geopolitical, economic, financial, political regulatory, judicial or other conditions or events.

Historical United States Treasury rates are not an indication of future United States Treasury rates.

As noted above, the annual interest rate on the junior subordinated debentures for each Interest Reset Period will be set by reference to the Five-Year Treasury Rate as of the most recent Reset Interest Determination Date (provided, that the interest rate during any Interest Reset Period will not reset below the initial interest rate). In the past, United States Treasury rates have experienced significant fluctuations. Historical levels, fluctuations and trends of United States Treasury rates are not necessarily indicative of future levels. Any historical upward or downward trend in United States Treasury rates is not an indication that United States Treasury rates are more or less likely to increase or decrease at any time after July 1, 2033, and historical United States Treasury rates are not an indication of future Five-Year Treasury Rates.

The Company may choose to redeem the junior subordinated debentures prior to maturity.

At any time and from time to time (i) on any day during the period commencing on the date falling 90 days prior to the first Interest Reset Date and ending on and including the first Interest Reset Date and (ii) after the first Interest Reset Date, on any Interest Payment Date, the Company may redeem in whole, or in part, the junior subordinated debentures at a redemption price equal to 100% of the principal amount of the junior subordinated debentures being redeemed, plus accrued and unpaid interest, if any, thereon (including any Additional Interest).

If a Tax Event (as defined herein) occurs, the Company may redeem in whole, but not in part, the junior subordinated debentures, at 100% of their principal amount, plus any accrued and unpaid interest thereon (including any Additional Interest). If a Rating Agency Event (as defined herein) occurs, the Company may redeem in whole, but not in part, the junior subordinated debentures, at 102% of their principal amount, plus any accrued and unpaid interest thereon (including any Additional Interest).

In addition, the Company may redeem the junior subordinated debentures, at its option, in whole, but not in part, if a Tax Credit Event occurs. A "Tax Credit Event" occurs with respect to the junior subordinated debentures if, in the Company's reasonable determination, there exists a material risk, due to the junior subordinated debentures (considered together with other debt) having been issued, as part of an original issuance, to one or more "specified foreign entities," as defined in Section 7701(a)(51)(B) of the Internal Revenue Code of 1986, as amended (the "Code"), that the Company or any of its affiliates would be unable to utilize or otherwise

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ineligible to claim any tax credits otherwise allowed under Section 38 of the Code. "Specified foreign entities," as further defined in Section 7701(a)(51)(B) of the Code, generally include, among other entities: (i) the governments of China, Iran, North Korea or Russia or their agencies or instrumentalities, (ii) certain citizens or nationals of such countries, (iii) entities organized under the laws of, or having their principal place of business in, such countries, (iv) entities controlled by any of the above, including subsidiaries, measured by more than 50% ownership of stock (by vote or value) in a corporation, profits interests or capital interests in a partnership, or beneficial interest in another entity, (v) certain Chinese military companies described under Section 1260H of the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021, (vi) Contemporary Amperex Technology Company (CATL), BYD Company, Envision Energy, EVE Energy Company, Gotion High-tech Company, Hithium Energy Storage Technology Company, or any successor company to the foregoing, (vii) certain companies that violate the Uyghur Forced Labor Prevention Act of 2021 and (viii) entities that the Office of Foreign Assets Control of the Department of the Treasury ("OFAC") have included on the list of specially designated nationals and blocked persons maintained by OFAC. A redemption of the junior subordinated debentures for this reason would be at a redemption price equal to 101% of the principal amount of the junior subordinated debentures being redeemed, in each case plus accrued and unpaid interest to, but not including, the redemption date (including any Additional Interest).

If prevailing interest rates are lower at the time of redemption, holders of the junior subordinated debentures to be redeemed may not be able to reinvest the redemption proceeds in a comparable security at an interest rate as high as the interest rate on the junior subordinated debentures being redeemed. In addition, during times when the Company may elect to redeem the junior subordinated debentures or when the Company is perceived to be able to redeem the junior subordinated debentures, the market value of the junior subordinated debentures generally will not rise substantially above the price at which they can be redeemed.

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USE OF PROCEEDS

We estimate the net proceeds from the sale of the junior subordinated debentures, after deducting the underwriting discount and the estimated offering expenses, will be $     million. We intend to use the net proceeds from the sale of the junior subordinated debentures for the repayment of short-term borrowings, which have an average annualized interest rate of approximately 3.92% and maturities under 30 days, and for general corporate purposes.

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DESCRIPTION OF JUNIOR SUBORDINATED DEBENTURES

The following summary sets forth the specific terms and provisions of the junior subordinated debentures. The following description of the specific terms of the junior subordinated debentures supplements, and, to the extent inconsistent, replaces, the description of the general terms and provisions of the debt securities and the indenture governing the junior subordinated debentures set forth in the accompanying prospectus under "Description of Debt Securities." The following summary is qualified in its entirety by reference to the terms and provisions of the junior subordinated debentures and the indenture, which are incorporated in this prospectus supplement and the accompanying prospectus by reference. Capitalized terms not otherwise defined in this section, or in the accompanying prospectus, have the meanings given to them in the junior subordinated debentures and in the indenture.

General

We will issue the junior subordinated debentures as a series of our subordinated debt securities under the indenture described in the accompanying prospectus.

The indenture does not limit the amount of indebtedness that we may issue. As of March 31, 2026, approximately $7.5 billion aggregate principal amount of senior debt securities, excluding current maturities, and $1.5 billion of junior subordinated debentures were issued and outstanding under the indenture. On March 31, 2026, we and our subsidiaries had consolidated long-term indebtedness of approximately $26.3 billion in aggregate principal amount, substantially all of which (except for our other junior subordinated debentures) would be effectively senior to the junior subordinated debentures.

We may also "reopen" the junior subordinated debentures to issue additional junior subordinated debentures having the same ranking, interest rate, maturity, and other terms (other than the date of issuance, price to public and, in some circumstances, interest accrual dates) as the junior subordinated debentures, without the consent of the holders of such junior subordinated debentures. Any such additional junior subordinated debentures will, together with the existing junior subordinated debentures, constitute a single series of debt securities under the indenture; provided that if any such additional junior subordinated debentures are not fungible for U.S. federal income tax purposes with the junior subordinated debentures offered hereby, such junior subordinated debentures will be issued under a separate CUSIP number.

The junior subordinated debentures will mature on July 1, 2058, and they are our unsecured obligations and will be subordinate in right of payment to our Senior Indebtedness (as described below in this section under "Subordination"). The junior subordinated debentures will be issued only in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof. Unless earlier redeemed, the entire principal amount of the junior subordinated debentures will mature and become due and payable, together with any accrued and unpaid interest thereon, on July 1, 2058.

Interest and Principal

The junior subordinated debentures will bear interest (i) from and including the date of original issuance to, but excluding, July 1, 2033 at an annual rate of    % and (ii) from and including July 1, 2033 during each Interest Reset Period at an annual rate equal to the Five-Year Treasury Rate as of the most recent Reset Interest Determination Date, plus    %; provided, that the interest rate during any Interest Reset Period will not reset below    % (which equals the initial interest rate on the junior subordinated debentures). Subject to the Company's right to defer interest payments as described below, interest will be payable semi-annually in arrears on January 1 and July 1 of each year to the person in whose name such junior subordinated debenture is registered at the close of business (i) on the business day immediately preceding such Interest Payment Date if the junior subordinated debentures are in book-entry only form or (ii) on the 15th calendar day preceding such Interest Payment Date if the junior subordinated debentures are not in book-entry only form (whether or not a

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business day), provided that interest payable at maturity or on a redemption date will be paid to the person to whom principal is payable. The initial Interest Payment Date is January 1, 2027. The amount of interest payable will be computed on the basis of a 360-day year of twelve 30-day months.

"Business day" means any day other than a Saturday or Sunday or a day on which commercial banks in the state of New York are required or authorized by law or executive order to be closed. In the event that any interest payment date, redemption date or maturity date is not a business day, then the required payment of principal and interest will be made on the next succeeding day that is a business day (and without any interest or other payment in respect of any such delay). If, however, that business day is in the next calendar year, payment will be made on the immediately preceding business day, in each case with the same force and effect as if made on the payment date.

Unless all of the outstanding junior subordinated debentures have been redeemed as of July 1, 2033, the Company will appoint a calculation agent (the "Calculation Agent") with respect to the junior subordinated debentures prior to the Reset Interest Determination Date preceding July 1, 2033. The Company or any of its affiliates may assume the duties of the Calculation Agent. The applicable interest rate for each Interest Reset Period will be determined by the Calculation Agent as of the applicable Reset Interest Determination Date. If the Company or one of its affiliates is not the Calculation Agent, the Calculation Agent will notify the Company of the interest rate for the relevant Interest Reset Period promptly upon such determination. The Company will notify the trustee of such interest rate, promptly upon making or being notified of such determination. The Calculation Agent's determination of any interest rate and its calculation of the amount of interest for any Interest Reset Period beginning on or after July 1, 2033 will be conclusive and binding absent manifest error, will be made in the Calculation Agent's sole discretion and, notwithstanding anything to the contrary in the documentation relating to the junior subordinated debentures, will become effective without consent from any other person or entity. Such determination of any interest rate and calculation of the amount of interest will be on file at the Company's principal offices and will be made available to any holder of the junior subordinated debentures upon request. In no event shall the trustee be the Calculation Agent, nor shall it have any liability for any determination made by or on behalf of such Calculation Agent.

"Five-Year Treasury Rate" means, as of any Reset Interest Determination Date, the average of the yields on actively traded United States Treasury securities adjusted to constant maturity, for five-year maturities, for the five consecutive business days immediately prior to the respective Reset Interest Determination Date appearing under the caption "Treasury Constant Maturities" as published in the most recent H.15.

If the Five-Year Treasury Rate cannot be determined pursuant to the method described above, the Calculation Agent, after consulting such sources as it deems comparable to any of the foregoing calculations, or any such source as it deems reasonable from which to estimate the Five-Year Treasury Rate, will determine the Five-Year Treasury Rate in its sole discretion, provided that if the Calculation Agent determines there is an industry-accepted successor Five-Year Treasury Rate, then the Calculation Agent will use such successor rate. If the Calculation Agent has determined a substitute or successor base rate in accordance with the foregoing, the Calculation Agent in its sole discretion may determine the business day convention, the definition of "business day" and the Reset Interest Determination Date to be used and any other relevant methodology for calculating such substitute or successor base rate, including any adjustment factor needed to make such substitute or successor base rate comparable to the Five-Year Treasury Rate, in a manner that is consistent with industry-accepted practices for such substitute or successor base rate. If the Five-Year Treasury Rate cannot be determined pursuant to the methods described above, then the Five-Year Treasury Rate will be the same interest rate determined for the prior Reset Interest Determination Date or, if the Five-Year Treasury Rate cannot be so determined as of the Reset Interest Determination Date preceding the first Interest Reset Date, then the interest rate applicable for the Interest Reset Period beginning on and including the first Interest Reset Date will be deemed to be    % per annum, which is the same interest rate as in effect from and including the original issue date to, but excluding, the first Interest Reset Date.

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"H.15" means the daily statistical release designated as such, or any successor publication as determined by the Calculation Agent in its sole discretion, published by the Federal Reserve Board, and "most recent H.15" means the H.15 published closest in time but prior to the close of business on the applicable Reset Interest Determination Date.

"Interest Reset Date" means July 1, 2033 and each date falling on the five-year anniversary of the preceding Interest Reset Date.

"Interest Reset Period" means the period from and including July 1, 2033 to, but not including, the next following Interest Reset Date and thereafter each period from and including each Interest Reset Date to, but not including, the next following Interest Reset Date or the maturity date or date of redemption, as the case may be.

"Reset Interest Determination Date" means, in respect of any Interest Reset Period, the day falling two business days prior to the beginning of such Interest Reset Period.

Optional Redemption

At any time and from time to time (i) on any day in the period commencing on the date falling 90 days prior to the first Interest Reset Date and ending on and including the first Interest Reset Date and (ii) after the first Interest Reset Date, on any Interest Payment Date, the junior subordinated debentures will be subject to redemption at the option of the Company in whole or in part upon not less than 15 nor more than 60 days' notice, at a redemption price equal to 100% of the principal amount of the junior subordinated debentures being redeemed plus any accrued and unpaid interest (including any Additional Interest) on the junior subordinated debentures being redeemed to, but not including, the redemption date. Any redemption of the junior subordinated debentures may be conditioned upon the occurrence of one or more conditions precedent.

The Company may also redeem the junior subordinated debentures (i) in whole, but not in part, if certain changes in tax laws, regulations or interpretations occur, at the redemption price and under the circumstances described below under "-Redemption following a Tax Event", (ii) in whole, but not in part, if a rating agency makes certain changes in the equity credit criteria for securities such as the junior subordinated debentures, at the redemption price and under the circumstances described below under "-Redemption following a Rating Agency Event" and (iii) in whole, but not in part, if there has been a Tax Credit Event, at the redemption price and under the circumstances described below under "-Redemption following a Tax Credit Event."

The junior subordinated debentures will not be entitled to the benefit of a sinking fund or be subject to redemption at the option of the holder.

Right to redeem upon a Tax Event

We will have the right to redeem, upon not less than 15 nor more than 60 days' notice, in whole but not in part, the junior subordinated debentures following the occurrence of a Tax Event (as defined below), at 100% of their principal amount plus any accrued and unpaid interest thereon (including any Additional Interest) to, but not including, the redemption date.

A "Tax Event" means that DTE Energy has received an opinion of nationally recognized independent tax counsel experienced in such matters to the effect that, as a result of:

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which amendment or change becomes effective or proposed change, pronouncement, interpretation, action or decision is announced on or after the date of this prospectus supplement, there is more than an insubstantial risk that interest payable on the junior subordinated debentures is not or within 90 days of the date of the opinion would not be deductible, in whole or in part, by us for United States federal income tax purposes.

Right to redeem upon a Rating Agency Event

We will have the right to redeem, upon not less than 15 nor more than 60 days' notice, in whole but not in part, the junior subordinated debentures following the occurrence of a Rating Agency Event (as defined below), at 102% of their principal amount plus any accrued and unpaid interest thereon (including any Additional Interest) to, but not including, the redemption date.

"Rating Agency Event" means a change in the methodology published by any nationally recognized statistical rating organization within the meaning of Section 3(a)(62) of the Exchange Act (sometimes referred to in this prospectus supplement as a "rating agency") that currently publishes a rating for us in assigning equity credit to securities such as the junior subordinated debentures, as such methodology is in effect on the date of issuance of this prospectus supplement (the "current criteria"), which change results in a lower equity credit being assigned by such rating agency to the junior subordinated debentures as of the date of such change than the equity credit that would have been assigned to the junior subordinated debentures as of the date of such change by such rating agency pursuant to its current criteria.

Right to redeem upon a Tax Credit Event

If a Tax Credit Event (as defined below) occurs, we may redeem, upon a notice of redemption not less than 15 nor more than 60 days prior to the date fixed for redemption, the junior subordinated debentures, in whole but not in part at a redemption price equal to 101% of the principal amount of the junior subordinated debentures being redeemed, plus accrued and unpaid interest to, but not including, the redemption date (including any Additional Interest). A notice of redemption of the junior subordinated debentures upon the occurrence of a Tax Credit Event (i) may only be sent by the later of (a) the end of the calendar year in which the junior subordinated debentures were issued and (b) six months from the date of issuance of the junior subordinated debentures and (ii) shall be accompanied by a certificate from an officer of DTE Energy stating that a Tax Credit Event has occurred.

A"Tax Credit Event"occurs with respect to the junior subordinated debentures if, in our reasonable determination, there exists a material risk, due to the junior subordinated debentures (considered together with other debt) having been issued, as part of an original issuance, to one or more "specified foreign entities," as defined in Section 7701(a)(51)(B) of the Code, that we or any of our affiliates would be unable to utilize or otherwise ineligible to claim any tax credits otherwise allowed under Section 38 of the Code.

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Deferral of Payment Periods

So long as there is no event of default under the indenture with respect to the junior subordinated debentures, we may defer interest payments on the junior subordinated debentures for a period of up to 10 consecutive years (each period, commencing on the date that the first such interest payment would otherwise have been made, an "Optional Deferral Period"); except that no Optional Deferral Period may extend beyond the maturity of the junior subordinated debentures or end on a day other than an Interest Payment Date. During an Optional Deferral Period, the interest on the junior subordinated debentures will still accrue at the rate then applicable to junior subordinated debentures from the applicable Interest Payment Date to the date of payment, compounded semi-annually, to the extent permitted by law ("Additional Interest").

Before the end of any Optional Deferral Period that is shorter than 10 consecutive years, we may further defer the period, so long as the entire Optional Deferral Period does not exceed 10 consecutive years or extend beyond the maturity or redemption date, if earlier, of the junior subordinated debentures. We may also elect to shorten the length of any Optional Deferral Period. At the end of any Optional Deferral Period, if all amounts then due on the junior subordinated debentures, including interest on unpaid interest, have been paid, we may elect to begin a new Optional Deferral Period.

If we defer payment on the junior subordinated debentures, neither we nor our majority-owned subsidiaries may:

However, during an Optional Deferral Period, we may (a) pay dividends or distributions payable solely in shares of common stock or options, warrants or rights to subscribe for or purchase shares of our common stock, (b) declare any dividend in connection with the implementation of a plan providing for the issuance by us to all holders of our common stock of rights entitling them to subscribe for or purchase common stock or any class or series of preferred stock, which rights (1) are deemed to be transferred with such common stock, (2) are not exercisable and (3) are also issued in respect of future issuances of common stock, in each case until the occurrence of a specified event or events (a "Rights Plan"), (c) issue any of our shares of capital stock under any Rights Plan or redeem or repurchase any rights distributed pursuant to a Rights Plan, (d) reclassify our capital stock or exchange or convert one class or series of our capital stock for another class or series of our capital stock, (e) purchase fractional interests in shares of our capital stock pursuant to the conversion or exchange provisions of such capital stock or the security being converted or exchanged, (f) purchase common stock related to the issuance of common stock or rights under our dividend reinvestment plan or any of our benefit plans for our directors, officers, employees, consultants or advisors, and (g) settle conversion of any convertible notes that rank equally with the junior subordinated debentures.

We will give the holders of junior subordinated debentures and the trustee written notice of our election or any shortening or extension of the Optional Deferral Period at least ten business days prior to the earlier of (1) the next succeeding interest payment date or (2) the date upon which we are required to give notice to the New York Stock Exchange or any applicable self-regulatory organization or to holders of the junior subordinated debentures of the record or payment date of the related interest payment.

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Subordination

The junior subordinated debentures are our unsecured obligations and will be subordinate and junior in right of payment, to the extent set forth in the indenture, to all our Senior Indebtedness as defined in the accompanying prospectus under "Description of Debt Securities-Subordinated Debt Securities." If:

then the holders of Senior Indebtedness generally will have the right to receive payment, in the case of the first event above, of all amounts due or to become due upon that Senior Indebtedness, and, in the case of the second and third events above, of all amounts due on that Senior Indebtedness, or we must make provision for those payments, before the holders of any junior subordinated debentures have the right to receive any payments of principal or interest on their junior subordinated debentures.

If the trustee or any holder of junior subordinated debentures receives any payment or distribution on account of the junior subordinated debentures before all of our Senior Indebtedness is paid in full, then that payment or distribution will be paid over, or delivered and transferred to, the holders of our Senior Indebtedness at the time outstanding.

The rights of the holders of the junior subordinated debentures will be subrogated to the rights of the holders of our Senior Indebtedness to the extent of any payment we made to the holders of our Senior Indebtedness that otherwise would have been made to the holders of the junior subordinated debentures but for the subordination provisions.

The junior subordinated debentures will rank equally with our 2017 Series E junior subordinated debentures due 2077, our 2020 Series G junior subordinated debentures due 2080, our 2021 Series E junior subordinated debentures due 2081, our 2025 Series H junior subordinated debentures due 2085 and any other pari passu junior subordinated debentures we may issue from time to time. The junior subordinated debentures will be effectively junior to all obligations of our subsidiaries. Our obligations under the junior subordinated debentures are not guaranteed by our subsidiaries.

Senior Indebtedness will be entitled to the benefits of the subordination provisions in the indenture irrespective of the amendment, modification or waiver of any term of the Senior Indebtedness. We may not amend the indenture to change adversely the subordination provisions applicable to any outstanding junior subordinated debentures without the consent of each holder of Senior Indebtedness that the amendment would adversely affect.

See "Description of Debt Securities-Subordinated Debt Securities" in the accompanying prospectus for a description of the additional rights of holders of Senior Indebtedness and obligations of holders of the junior subordinated debentures.

Events of Default under the Indenture

The following are the "events of default" applicable to the junior subordinated debentures, instead of the events of default described in the accompanying prospectus:

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With respect to the junior subordinated debentures, a failure to comply with covenants under the indenture does not constitute an event of default. See "Description of Debt Securities-Events of Default" in the accompanying prospectus for a description of rights and remedies relating to events of default.

Covenants

The covenant described in "Description of Debt Securities-Covenants-Limitation on Secured Debt" in the accompanying prospectus will not apply to the junior subordinated debentures. The provisions for defeasance or covenant defeasance described in "Description of Debt Securities-Discharge, Defeasance and Covenant Defeasance" in the accompanying prospectus will not apply to the junior subordinated debentures.

Governing Law

The indenture is, and the junior subordinated debentures will be, governed by, and construed in accordance with, the laws of the State of New York.

Concerning the Trustee

The Bank of New York Mellon Trust Company, N.A. is the successor trustee under the indenture. In addition to acting as trustee under the indenture and in certain other capacities as described in the accompanying prospectus, affiliates of The Bank of New York Mellon Trust Company, N.A. also act as a lender and provide other banking, trust and investment services in the ordinary course of business to DTE Energy and its affiliates.

Book-Entry Securities

The junior subordinated debentures will be issued in fully registered form and will be represented by one or more global certificates (the "Global Security") registered in the name of Cede & Co., as nominee of The Depository Trust Company ("DTC"). The Global Security representing the junior subordinated debentures will be deposited with, or on behalf of, DTC. Investors may elect to hold interests in the Global Security through DTC, Clearstream Banking S.A., which we refer to as "Clearstream, Luxembourg," or Euroclear Bank SA/NV, as operator of the Euroclear System, which we refer to as "Euroclear," if they are participants in such systems, or indirectly through organizations which are participants in such systems. Clearstream, Luxembourg and Euroclear will hold interests on behalf of their participants through customers' securities accounts in Clearstream, Luxembourg's and Euroclear's names on the books of their respective depositaries, which in turn will hold such interests in customers' securities accounts in the depositaries' names on the books of DTC. Citibank, N.A. will act as depositary for Clearstream, Luxembourg and JPMorgan Chase Bank will act as depositary for Euroclear, which we refer to in such capacities as the "U.S. Depositaries." The junior subordinated debentures will not be exchangeable for certificates issued in definitive, registered form ("Certificated Notes") at the option of the holder and, except as set forth below, will not otherwise be issuable in definitive form.

DTC has advised us and the underwriters as follows: DTC is a limited-purpose trust company organized under the New York Banking Law, a "banking organization" within the meaning of the New York Banking Law, a member of the Federal Reserve System, a "clearing corporation" within the meaning of the New York Uniform Commercial Code and a "clearing agency" registered pursuant to the provisions of Section 17A of the Securities Exchange Act of 1934. DTC holds securities that its participants ("Participants") deposit with DTC. DTC also facilitates the settlement among Participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in Participants' accounts, thereby eliminating the need for physical movement of securities certificates. "Direct Participants" include securities brokers and dealers,

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banks, trust companies, clearing corporations, and certain other organizations. Access to the DTC system is also available to others such as securities brokers and dealers, banks, and trust companies that clear through or maintain a custodial relationship with a Direct Participant, either directly or indirectly ("Indirect Participants"). The rules applicable to DTC and its Participants are on file with the Securities and Exchange Commission.

Clearstream, Luxembourg advises that it is incorporated under the laws of Luxembourg as a bank. Clearstream, Luxembourg holds securities for its customers, which we refer to as "Clearstream, Luxembourg Customers," and facilitates the clearance and settlement of securities transactions between Clearstream, Luxembourg Customers through electronic book-entry transfers between their accounts. Clearstream, Luxembourg provides to Clearstream, Luxembourg Customers, among other things, services for safekeeping, administration, clearance and settlement of internationally traded securities and securities lending and borrowing. Clearstream, Luxembourg interfaces with domestic securities markets in over 30 countries through established depository and custodial relationships. As a bank, Clearstream, Luxembourg is subject to regulation by the Luxembourg Commission for the Supervision of the Financial Sector, also known as the Commission de Surveillance du Secteur Financier. Clearstream, Luxembourg Customers are recognized financial institutions around the world, including underwriters, securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. Clearstream, Luxembourg Customers in the United States are limited to securities brokers and dealers and banks. Indirect access to Clearstream, Luxembourg is also available to other institutions such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a Clearstream, Luxembourg Customer.

Distributions with respect to the junior subordinated debentures held through Clearstream, Luxembourg will be credited to cash accounts of Clearstream, Luxembourg Customers in accordance with its rules and procedures, to the extent received by the U.S. Depositary of Clearstream, Luxembourg.

Euroclear advises that it was created in 1968 to hold securities for its participants, which we refer to as "Euroclear Participants," and to clear and settle transactions between Euroclear Participants through simultaneous electronic book-entry delivery against payment, thereby eliminating the need for physical movement of certificates and any risk from lack of simultaneous transfers of securities and cash. Euroclear provides various other services, including securities lending and borrowing and interfaces with domestic markets in several countries. Euroclear is operated by Euroclear Bank SA/NV, which we refer to as the "Euroclear Operator," under contract with Euroclear Clearance Systems, S.C., a Belgian cooperative corporation, which we refer to as the "Cooperative." All operations are conducted by the Euroclear Operator, and all Euroclear securities clearance accounts and Euroclear cash accounts are accounts with the Euroclear Operator, not the Cooperative. The Cooperative establishes policy for Euroclear on behalf of Euroclear Participants. Euroclear Participants include banks, including central banks, securities brokers and dealers and other professional financial intermediaries and may include the underwriters. Indirect access to Euroclear is also available to other firms that clear through or maintain a custodial relationship with a Euroclear Participant, either directly or indirectly.

Securities clearance accounts and cash accounts with the Euroclear Operator are governed by the Terms and Conditions Governing Use of Euroclear and the related Operating Procedures of the Euroclear System, and applicable Belgian law, which we refer to collectively as the "Terms and Conditions." The Terms and Conditions govern transfers of securities and cash within Euroclear, withdrawals of securities and cash from Euroclear, and receipts of payments with respect to securities in Euroclear. All securities in Euroclear are held on a fungible basis without attribution of specific certificates to specific securities clearance accounts. The Euroclear Operator acts under the Terms and Conditions only on behalf of Euroclear Participants and has no record of or relationship with persons holding through Euroclear Participants.

Distributions with respect to the junior subordinated debentures held beneficially through Euroclear will be credited to the cash accounts of Euroclear Participants in accordance with the Terms and Conditions, to the extent received by the U.S. Depositary for Euroclear.

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Euroclear further advises that investors that acquire, hold and transfer interests in the junior subordinated debentures by book-entry through accounts with the Euroclear Operator or any other securities intermediary are subject to the laws and contractual provisions governing their relationship with their intermediary, as well as the laws and contractual provisions governing the relationship between such an intermediary and each other intermediary, if any, standing between themselves and the Global Security.

The Euroclear Operator advises that, under Belgian law, investors that are credited with securities on the records of the Euroclear Operator have a co-property right in the fungible pool of interests in securities on deposit with the Euroclear Operator in an amount equal to the amount of interests in securities credited to their accounts. In the event of the insolvency of the Euroclear Operator, Euroclear Participants would have a right under Belgian law to the return of the amount and type of interests in securities credited to their accounts with the Euroclear Operator. If the Euroclear Operator did not have a sufficient amount of interests in securities on deposit of a particular type to cover the claims of all Euroclear Participants credited with such interests in securities on the Euroclear Operator's records, all Participants having an amount of interests in securities of such type credited to their accounts with the Euroclear Operator would have the right under Belgian law to the return of their pro rata share of the amount of interest in securities actually on deposit.

The Euroclear Operator advises that, under Belgian law, the Euroclear Operator is required to pass on the benefits of ownership in any interests in securities on deposit with it, such as dividends, voting rights and other entitlements, to any person credited with such interests in securities on its records.

Purchases of junior subordinated debentures under the DTC system must be made by or through Direct Participants. Upon the issuance by us of the junior subordinated debentures, DTC will credit, on its book-entry system, the respective principal amounts of the junior subordinated debentures to the accounts of Participants. The accounts to be credited shall be designated by the underwriters. The ownership interest of each actual purchaser of each junior subordinated debenture (a "Beneficial Owner") will be recorded on the Direct and Indirect Participants' records. Beneficial Owners will not receive written confirmation from DTC of their purchase, but Beneficial Owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the Direct or Indirect Participant through which the Beneficial Owners entered into the transaction. Transfers of ownership interests in the junior subordinated debentures are expected to be effected by entries made on the books of Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in junior subordinated debentures, except as set forth below. To facilitate subsequent transfers, all junior subordinated debentures deposited by Participants with DTC will be registered in the name of DTC's partnership nominee, Cede & Co. The deposit of junior subordinated debentures with DTC and their registration in the name of Cede & Co. will not affect any change in beneficial ownership. The laws of some states require that certain purchasers of securities take physical delivery of such securities in definitive form. Such laws may impair the ability to transfer beneficial interests in the Global Security.

Title to book-entry interests in the junior subordinated debentures will pass by book-entry registration of the transfer within the records of Clearstream, Luxembourg, Euroclear or DTC, as the case may be, in accordance with their respective procedures. Book-entry interests in the junior subordinated debentures may be transferred within Clearstream, Luxembourg and within Euroclear and between Clearstream, Luxembourg and Euroclear in accordance with procedures established for these purposes by Clearstream, Luxembourg and Euroclear. Book-entry interests in the junior subordinated debentures may be transferred within DTC in accordance with procedures established for this purpose by DTC. Transfers of book-entry interests in the junior subordinated debentures among Clearstream, Luxembourg and Euroclear and DTC may be effected in accordance with procedures established for this purpose by Clearstream, Luxembourg, Euroclear and DTC.

So long as DTC, or its nominee, is the registered owner of the Global Security, DTC or its nominee, as the case may be, will be considered the sole owner or holder of the junior subordinated debentures for all purposes under the indenture. Except as provided below, Beneficial Owners of the junior subordinated debentures will not

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be entitled to have the junior subordinated debentures registered in their names, will not receive or be entitled to receive physical delivery of junior subordinated debentures in definitive form and will not be considered the owners or holders thereof under the indenture. Unless and until it is exchanged in whole or in part for individual certificates evidencing the junior subordinated debentures represented thereby, the Global Security may not be transferred except as a whole by DTC for the Global Security to a nominee of such Depositary or by a nominee of such Depositary to such Depositary or another nominee of such Depositary or by DTC or any nominee to a successor Depositary or any nominee of such successor.

We expect that conveyance of notices and other communications by DTC to Direct Participants, by Direct Participants to Indirect Participants, and by Direct Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time. In addition, neither DTC nor Cede & Co. will consent or vote with respect to junior subordinated debentures unless authorized by a Direct Participant in accordance with DTC's procedures. We have been advised that DTC's usual procedure is to mail an omnibus proxy to us as soon as possible after the record date with respect to such consent or vote. The omnibus proxy would assign Cede & Co.'s consenting or voting rights to those Direct Participants to whose accounts the junior subordinated debentures are credited on such record date (identified in a listing attached to the omnibus proxy).

Payments of principal of and interest, if any, on the junior subordinated debentures registered in the name of DTC or its nominee will be made by us through the paying agent to DTC or its nominee, as the case may be, as the registered owner of the Global Security. Neither we, the trustee, any paying agent nor the registrar for the junior subordinated debentures will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in the Global Security or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

We have been advised that DTC will credit the accounts of Direct Participants with payment in amounts proportionate to their respective holdings in principal amount of interest in the Global Security as shown on the records of DTC. We have been advised that DTC's practice is to credit Direct Participants' accounts on the applicable payment date unless DTC has reason to believe that it will not receive payment on such date. We expect that payments by Participants to Beneficial Owners will be governed by standing customer instructions and customary practices, as is now the case with securities held for the accounts of customers. Such payments will be the responsibility of such Participants.

DTC may discontinue providing its services as securities depositary with respect to the junior subordinated debentures at any time by giving reasonable notice to us. Under those circumstances, in the event that a successor securities depositary is not obtained, Certificated Notes will be printed and delivered to the holders of record. Additionally, we may decide to discontinue use of the system of book entry transfers through DTC (or a successor depositary) with respect to the junior subordinated debentures. Upon receipt of a withdrawal request from us, DTC will notify its participants of the receipt of a withdrawal request from us reminding participants that they may utilize DTC's withdrawal procedures if they wish to withdraw their securities from DTC, and DTC will process withdrawal requests submitted by participants in the ordinary course of business. To the extent that the book-entry system is discontinued, Certificated Notes will be printed and delivered to the holders of record. We have no responsibility for the performance by DTC or its Direct and Indirect Participants of their respective obligations as described in this prospectus supplement or under the rules and procedures governing their respective operations.

Global Clearance and Settlement Procedures

Initial settlement for the junior subordinated debentures will be made in immediately available funds. Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC's rules and will be settled in immediately available funds using DTC's Same-Day Funds Settlement System. Secondary market trading between Clearstream, Luxembourg Customers and/or Euroclear Participants will occur

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in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream, Luxembourg and Euroclear and will be settled using the procedures applicable to conventional Eurobonds in immediately available funds.

Cross-market transfers between persons holding directly or indirectly through DTC on the one hand, and directly or indirectly through Clearstream, Luxembourg Customers or Euroclear Participants, on the other, will be effected in DTC in accordance with DTC's rules on behalf of the relevant European international clearing system by its U.S. Depositary; however, such cross-market transactions will require delivery of instructions to the relevant European international clearing system by the counterparty in such system in accordance with its rules and procedures and within its established deadlines, in European time. The relevant European international clearing system will, if the transaction meets its settlement requirements, deliver instructions to its U.S. Depositary to take action to effect final settlement on its behalf by delivering interests in the junior subordinated debentures to or receiving interests in the junior subordinated debentures from DTC, and making or receiving payment in accordance with normal procedures for same-day funds settlement applicable to DTC. Clearstream, Luxembourg Customers and Euroclear Participants may not deliver instructions directly to their respective U.S. Depositaries.

Because of time-zone differences, credits of interests in the junior subordinated debentures received in Clearstream, Luxembourg or Euroclear as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. Such credits or any transactions involving interests in such junior subordinated debentures settled during such processing will be reported to the relevant Clearstream, Luxembourg Customers or Euroclear Participants on such business day. Cash received in Clearstream, Luxembourg or Euroclear as a result of sales of interests in the junior subordinated debentures by or through a Clearstream, Luxembourg Customer or a Euroclear Participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream, Luxembourg or Euroclear cash account only as of the business day following settlement in DTC.

Although DTC, Clearstream, Luxembourg and Euroclear have agreed to the foregoing procedures in order to facilitate transfers of interests in the junior subordinated debentures among participants of DTC, Clearstream, Luxembourg and Euroclear, they are under no obligation to perform or continue to perform such procedures and such procedures may be changed or discontinued at any time.

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MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

The following summary describes the material United States federal income tax consequences of the purchase, ownership and disposition of the junior subordinated debentures and sets forth the opinions of Hunton Andrews Kurth LLP, tax counsel to DTE Energy. This summary is based upon the Internal Revenue Code of 1986, as amended (the "Tax Code"), Treasury regulations, and rulings and decisions now in effect, all of which are subject to change or differing interpretations, possibly with retroactive effect. In particular, either the Internal Revenue Service ("IRS") or the courts could disagree with the conclusions contained and positions taken in this summary.

The summary deals only with junior subordinated debentures held as capital assets (generally property held for investment) and does not deal with persons in special tax situations under U.S. federal income tax laws, such as financial institutions, banks, thrifts, insurance companies, tax-exempt entities, real estate investment trusts, regulated investment companies, brokers or dealers in securities or currencies, persons required to include income with respect to a junior subordinated debenture no later than when such income is taken into account as revenue on an "applicable financial statement" under Section 451(b) of the Tax Code, partnerships or other entities or arrangements classified as a partnership for U.S. federal income tax purposes (and their beneficial owners), persons subject to alternative minimum tax, persons holding junior subordinated debentures as a position in a "straddle," "hedging," "conversion" or constructive sale transaction for tax purposes, subchapter S corporations, certain former citizens or residents of the United States, controlled foreign corporations or passive foreign investment companies (or their shareholders), retirement plans, or U.S. Holders (as defined below) whose functional currency is not the United States dollar or that hold the junior subordinated debentures through a foreign broker or other foreign intermediary. The summary also does not deal with holders other than original purchasers who purchase the junior subordinated debentures upon original issuance at their original issue price. In addition, the following discussion does not address all possible tax consequences related to the acquisition, ownership and disposition of the junior subordinated debentures. In particular, it does not discuss the Medicare contribution tax on net investment income, any estate, gift, generation-skipping, transfer, state, local or foreign tax consequences, or the consequences arising under any tax treaty. Before purchasing the junior subordinated debentures, you should consult your own tax advisor concerning the application of United States federal income tax laws to your particular situation as well as any consequences of the purchase, ownership and disposition of the junior subordinated debentures arising under any other tax laws of the United States or other taxing jurisdictions.

For purposes of this summary, a "U.S. Holder" is a beneficial owner of a junior subordinated debenture that is for United States federal income tax purposes:

If a partnership (or an entity or arrangement treated as a partnership for U.S. federal income tax purposes) owns any of the junior subordinated debentures, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. If you are a partner of a partnership holding any of the junior subordinated debentures, you should consult your tax advisors as to the particular U.S. federal income tax considerations relevant to the acquisition, ownership and disposition of junior subordinated debentures.

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For purposes of this summary, a "Non-U.S. Holder" is a beneficial owner of a junior subordinated debenture that is an individual, corporation, estate or trust that is not a U.S. Holder and is not a partnership (or other entity or arrangement treated as a partnership for U.S. federal income tax purposes).

Classification of the Junior Subordinated Debentures

The determination of whether a security should be classified as indebtedness or equity for United States federal income tax purposes requires a judgment based on all relevant facts and circumstances. There is no statutory, judicial or administrative authority that directly addresses the United States federal income tax treatment of securities similar to the junior subordinated debentures. In the opinion of Hunton Andrews Kurth LLP, under current law and based on the facts contained in this prospectus supplement, the terms of the indenture and the junior subordinated debentures, and certain assumptions stated in the opinion and representations relied upon in rendering the opinion, the junior subordinated debentures will be classified for United States federal income tax purposes as indebtedness of DTE Energy (although there is no controlling authority directly on point). The opinion of Hunton Andrews Kurth LLP is not binding on the IRS or the courts. Moreover, no rulings have been or will be sought from the IRS with respect to the transactions described in this prospectus supplement. Accordingly, we cannot assure you that the IRS will not challenge the opinion described herein or that a court would not sustain such a challenge. If the IRS were to successfully challenge the classification of the junior subordinated debentures as indebtedness, interest payments on the junior subordinated debentures would be treated for United States federal income tax purposes as dividends to the extent of DTE Energy's current or accumulated earnings and profits. In the case of Non-U.S. Holders, interest payments treated as dividends would be subject to a 30% United States federal withholding tax, except to the extent provided by an applicable income tax treaty or except if the dividends are effectively connected with a trade or business in the United States conducted by the Non-U.S. Holder (and, if an applicable income tax treaty so provides, are attributable to a permanent establishment maintained in the United States by the Non-U.S. Holder), in which case such dividends would be subject to U.S. federal income tax on a net income basis generally in the same manner as if that Non-U.S. Holder were a U.S. Holder.

We agree, and by acquiring an interest in a junior subordinated debenture each beneficial owner of a junior subordinated debenture will agree, to treat the junior subordinated debentures as indebtedness for United States federal, state and local income tax purposes, and the remainder of this discussion assumes this treatment. You should consult your own tax advisors regarding the tax consequences that will arise if the junior subordinated debentures are not treated as indebtedness for United States federal income tax purposes.

U.S. Holders

Interest income and original issue discount

We have the option under certain circumstances to defer payments of interest on the junior subordinated debentures. Under the Treasury regulations relating to original issue discount ("OID"), a debt instrument is deemed to be issued with OID if there is more than a "remote" contingency that periodic stated interest payments due on the instrument will not be timely paid. We believe that the likelihood of our exercising the option to defer payment of stated interest is remote within the meaning of the Treasury regulations in part because our exercise of the option to defer payments of stated interest on the junior subordinated debentures would generally prevent us from:

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Accordingly, we do not expect the junior subordinated debentures to be treated as having OID for United States federal income tax purposes by reason of the option to defer payment of stated interest on the junior subordinated debentures.

In addition to the foregoing, we expect the junior subordinated debentures to be treated for United States federal income tax purposes as "varible rate debt instruments". Based on the Treasury regulations applicable to variable rate debt instruments and the expected pricing terms of the junior subordinated debentures, we do not expect the junior subordinated debentures to be treated as issued with OID.

Similarly, if certain circumstances occur (see "Description of the Junior Subordinated Debentures - Redemption"), we may become obligated to pay amounts in excess of stated interest on or principal of the junior subordinated debentures. Such excess payments will not affect the amount of interest income that a U.S. Holder recognizes if there is only a remote likelihood that such payments will be made. We believe that the likelihood that we will make any such payments is remote.

Based on these positions, stated interest payments on the junior subordinated debentures should be includible in your ordinary income at the time that those payments are received or accrued, depending on your regular method of accounting for United States federal income tax purposes. Our determination that these contingencies are remote is binding on you unless you disclose your contrary position in the manner required by applicable Treasury regulations. Our determination is not, however, binding on the IRS. There can be no assurance that the IRS or a court will agree with these positions. The meaning of the term "remote" in the Treasury regulations has not yet been addressed in any rulings or other guidance by the IRS or any court.

If the possibility of interest deferral were determined not to be remote, the junior subordinated debentures would be treated as issued with OID and all stated interest would be treated as OID as long as the junior subordinated debentures are outstanding. In that case, you would be required to accrue interest income on the junior subordinated debentures using a constant yield method before you actually receive any cash payment attributable to that interest, regardless of your regular method of accounting for United States federal income tax purposes.

If the possibility of excess payments were determined not to be remote, the junior subordinated debentures could be treated as "contingent payment debt instruments," in which case, under applicable Treasury regulations, you would be required to accrue interest income on the junior subordinated debentures in excess of stated interest and treat as ordinary income rather than as capital gain any income realized on the taxable disposition of the junior subordinated debentures. In the event excess payments are made, it would likely affect the amount and timing of the income you recognize, even if your junior subordinated debentures are not redeemed. If you are paid any excess amounts, you will be required to recognize such amounts as income. The remainder of this discussion assumes that the junior subordinated debentures will not be treated as contingent payment debt instruments.

Exercise of deferral option

Under the Treasury regulations, if we exercise our option to defer the payment of interest on the junior subordinated debentures then the junior subordinated debentures will be treated as if they had been redeemed and reissued for OID purposes. Accordingly, all remaining interest payments on the junior subordinated debentures (including interest on deferred interest) would be treated as OID, which you would be required to accrue and include in taxable income on an economic accrual basis over the remaining term of the junior subordinated debentures, without regard to the time interest is actually paid on the junior subordinated debentures and without

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regard to your regular method of accounting for United States federal income tax purposes. The amount of OID income includible in your taxable income would be determined on the basis of a constant yield method over the remaining term of the junior subordinated debentures, and the actual receipt of future payments of stated interest on the junior subordinated debentures would no longer be separately reported as taxable income. The total amount of OID that would accrue during the deferred interest payment period would be approximately equal to the amount of the cash payment due at the end of that period.

Any OID included in income would increase your adjusted tax basis in your junior subordinated debentures, and your actual receipt of cash interest payments would reduce that adjusted tax basis.

Sale of junior subordinated debentures

If you sell your junior subordinated debentures, or otherwise dispose of them in a taxable transaction, then you will recognize gain or loss in an amount equal to the difference between:

For these purposes, your adjusted tax basis generally will equal the initial purchase price that you paid for the junior subordinated debentures, plus any amount that you were required to include in gross income as OID, minus any cash payments you received in respect of accrued OID. Your gain or loss on the sale of junior subordinated debentures generally will be capital gain or loss, and will be long-term capital gain or loss if you have held the investment for more than one year at the time of disposition. Preferential rates of tax may apply to long-term capital gains if you are a non-corporate taxpayer. Subject to certain limitations, capital losses generally cannot be applied to offset ordinary income.

Information Reporting and Backup Withholding

In general, information reporting requirements will apply to payments to certain non-corporate U.S. Holders of principal and interest on a junior subordinated debenture and the proceeds from the sale or other taxable disposition of a junior subordinated debenture. If you are a U.S. Holder, you may be subject to backup withholding, currently at a rate of 24%, when you receive interest with respect to your junior subordinated debenture, or when you receive proceeds upon the sale, exchange, redemption, retirement or other disposition of your junior subordinated debenture. In general, you can avoid this backup withholding by properly executing, under penalties of perjury, an IRS Form W-9 or suitable substitute or successor form that provides your correct taxpayer identification number as well as certain other information or otherwise establish an exemption from backup withholding.

If you do not provide your correct taxpayer identification number on IRS Form W-9 or suitable substitute or successor form in a timely manner, you may be subject to penalties imposed by the IRS.

Backup withholding will not apply, however, with respect to payments made to certain holders, including corporations and tax-exempt organizations, provided their exemptions from backup withholding are properly established. Backup withholding is not an additional tax and amounts withheld may be refunded or credited against your United States federal income tax liability, provided you furnish the required information to the IRS in a timely manner.

Non-U.S. Holders

The following discussion applies only to Non-U.S. Holders as defined above. The rules governing the United States federal income taxation of a Non-U.S. Holder are complex and no attempt will be made herein to

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provide more than a summary of such rules. Non-U.S. Holders should consult their tax advisors about the rules concerning the tax consequences to them of the purchase, ownership and disposition of the junior subordinated debentures, including withholding on payments to Non-U.S. Holders and the potential application of tax treaties.

Interest income and original issue discount

Under present United States federal income tax law, subject to the discussions below under "Foreign Account Tax Compliance Act," if you are not engaged in a trade or business in the United States, no United States federal income tax or withholding tax will be imposed with respect to payments of principal or interest, including any OID, on the junior subordinated debentures under the "portfolio interest exemption," provided that:

If you do not satisfy the requirements described above, payments made to you will be subject to a 30% United States federal withholding tax, unless you provide to the withholding agent a properly executed (a) IRS Form W-8BEN, IRS Form W-8BEN-E or other appropriate form claiming an exemption from, or a reduction of, withholding tax under the benefit of an applicable tax treaty; or (b) IRS Form W-8ECI or other appropriate form stating that interest received on the junior subordinated debentures is not subject to withholding tax because it is effectively connected with your conduct of a trade or business in the United States (and, if an applicable income tax treaty so provides, is attributable to a permanent establishment maintained in the United States by you). In the latter case, interest (including any OID) will be subject to United States federal income tax on a net income basis in generally the same matter as if you were a U.S. Holder. In addition, if you are a foreign corporation engaged in a trade or business in the United States, you may also be subject to a branch profits tax, which is generally imposed on a foreign corporation on the deemed repatriation from the United States of effectively connected earnings and profits, at a 30% rate, unless the tax is reduced or eliminated by an applicable income tax treaty.

Special rules regarding U.S. federal withholding tax may apply in the case of junior subordinated debentures held by partnerships or certain types of trusts. Partnerships and trusts that are prospective purchasers should consult their own tax advisors regarding special rules that may be applicable in their particular circumstances.

Sales of junior subordinated debentures

Subject to the discussion below under "Information Reporting and Backup Withholding", any gain realized upon the sale or disposition of junior subordinated debentures generally will not be subject to United States federal income tax unless (a) the gain is effectively connected with a United States trade or business conducted by you (and, if an applicable income tax treaty so provides, is attributable to a permanent establishment maintained in the United States by you); or (b) if you are a Non-U.S. Holder who is an individual, you are present in the United States for 183 days or more in the taxable year of the sale or other disposition and certain other requirements are met. If you are engaged in a trade or business in the United States and income on the junior subordinated debentures is effectively connected with the conduct of that trade or business (and, if an applicable income tax treaty so provides, is attributable to a permanent establishment maintained in the United

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States by you), you will be subject to United States federal income tax on that income on a net income basis in generally the same manner as if you were a U.S. Holder. In addition, if you are a foreign corporation engaged in a trade or business in the United States, you may be subject to the branch profits tax described above.

Information Reporting and Backup Withholding

Information returns will be filed annually with the IRS in connection with payments we make on the junior subordinated debentures. Copies of these information returns may also be made available under the provisions of a specific tax treaty or other agreement to the tax authorities of the country in which the Non-U.S. Holder resides. Unless the Non-U.S. Holder complies with certification procedures to establish that it is not a U.S. person, information returns may be filed with the IRS in connection with the proceeds from a sale or other taxable disposition of the junior subordinated debentures, and the Non-U.S. Holder may be subject to backup withholding tax (currently at a rate of 24%) on payments on the junior subordinated debentures or on the proceeds from a sale or other taxable disposition of the junior subordinated debentures. The certification procedures required to claim the exemption from withholding tax on interest described above will satisfy the certification requirements necessary to avoid the backup withholding tax as well. The amount of any backup withholding from a payment to a Non-U.S. Holder will be allowed as a credit against the Non-U.S. Holder's United States federal income tax liability and may entitle the Non-U.S. Holder to a refund, provided that the required information is furnished to the IRS in a timely manner.

Foreign Account Tax Compliance Act

The Foreign Account Tax Compliance Act provisions of the Tax Code and related IRS guidance ("FATCA") impose a 30% U.S. withholding tax on certain payments (including interest payments on the junior subordinated debentures and, subject to the discussion of proposed Treasury regulations below, payments of gross proceeds from the sale or other disposition of junior subordinated debentures) made to a non-United States entity unless various U.S. information reporting and due diligence requirements (generally relating to ownership by U.S. persons of interests in or accounts with those entities) have been satisfied or an exemption applies and is established. An intergovernmental agreement between the jurisdiction of a recipient and the United States may modify the rules described in this paragraph. We will not be obligated to make any "gross up" or additional payments in respect of amounts withheld on the junior subordinated debentures if we determine that we must so withhold in order to comply with FATCA in respect of the amounts described above.

As noted above, withholding under FATCA can apply to payments of gross proceeds from the sale or other disposition of junior subordinated debentures, in addition to interest payments. However, Treasury regulations have been proposed that would entirely eliminate FATCA withholding on payments of gross proceeds. Taxpayers generally may rely on these proposed Treasury regulations until revoked or the promulgation of final Treasury regulations on the subject.

Prospective investors should consult their own tax advisors regarding FATCA and whether it may be relevant to the acquisition, ownership and disposition of the junior subordinated debentures.

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UNDERWRITING (CONFLICTS OF INTEREST)

Subject to the terms and conditions stated in the underwriting agreement with respect to the junior subordinated debentures, each of the underwriters named below, for whom BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Truist Securities, Inc., and Wells Fargo Securities, LLC are acting as representatives, has severally, and not jointly, agreed to purchase, and we have agreed to sell to the underwriters, the following principal amounts of junior subordinated debentures:

The underwriting agreement provides that the obligation of the underwriters to purchase the junior subordinated debentures included in this offering is subject to approval of certain legal matters by counsel and to certain other conditions. The underwriting agreement provides that the underwriters are obligated, subject to the terms and conditions set forth therein, to purchase all of the junior subordinated debentures if any are purchased. The underwriting agreement also provides that if an underwriter defaults, the purchase commitments of the non-defaulting underwriters may be increased or the offering of junior subordinated debentures may be terminated.

The underwriters propose to offer the junior subordinated debentures directly to the public at the public offering price on the cover page of this prospectus supplement and to selling group members at that price less a selling concession not in excess of   % per junior subordinated debenture. The underwriters and selling group members may allow a discount not in excess of   % per junior subordinated debenture on sales to other broker/dealers. After the initial public offering, the underwriters may change the public offering price and other selling terms.

We estimate that our total out of pocket expenses for this offering, excluding the underwriting discount, will be approximately $    .

We have agreed to indemnify the underwriters against liabilities under the Securities Act or to contribute to payments which the underwriters may be required to make in that respect.

The junior subordinated debentures are a new issue of securities with no established trading market. The junior subordinated debentures will not be listed on any securities exchange or any automated dealer quotation system. One or more of the underwriters intends to make a secondary market for the junior subordinated debentures. However, they are not obligated to do so and may discontinue making a secondary market for the junior subordinated debentures at any time without notice. No assurance can be given as to how liquid the trading market for the junior subordinated debentures will be.

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In connection with the offering, the underwriters may engage in stabilizing transactions, over-allotment transactions, syndicate covering transactions and penalty bids in accordance with Regulation M under the Exchange Act:

These stabilizing transactions, overallotment transactions, syndicate covering transactions and penalty bids may have the effect of raising or maintaining the market price of the junior subordinated debentures or preventing or retarding a decline in the market price of the junior subordinated debentures. As a result, the price of the junior subordinated debentures may be higher than the price that might otherwise exist in the open market. These transactions, if commenced, may be discontinued at any time without notice.

Certain of the underwriters and/or their affiliates act as lenders under our credit agreements, and may perform certain investment banking and advisory and general financing, trustee and commercial banking services for DTE Energy and its affiliates from time to time for which they have received customary fees and expenses. The underwriters and their affiliates may, from time to time, engage in transactions with or perform services for DTE Energy and its affiliates in the ordinary course of their business for which they will receive customary fees and expenses.

The underwriters are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, corporate trust, investment management, investment research, principal investment, hedging, financing and brokerage activities. Certain of the underwriters or their affiliates that have a lending relationship with us routinely hedge their credit exposure to us consistent with their customary risk management policies. A typical such hedging strategy would include these underwriters or their affiliates hedging such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the junior subordinated debentures offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the junior subordinated debentures offered hereby. In the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (which may include bank loans and/or credit default swaps) for their own account and for the accounts of their customers. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates. The underwriters and their affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates.

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Settlement

It is expected that delivery of the junior subordinated debentures will be made on or about the date specified on the cover page of this prospectus supplement, which will be the seventh business day (T+7) following the date of this prospectus supplement. Under Rule 15c6-1 under the Exchange Act, trades in the secondary market generally are required to settle in one business day (T+1), unless the parties to any such trade expressly agree otherwise. Accordingly, the purchasers who wish to trade the junior subordinated debentures on any date prior to one business day before the settlement date of this offering will be required to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of the junior subordinated debentures who wish to trade the junior subordinated debentures on any date prior to one business day before the settlement date of this offering should consult their own advisors.

Conflict of Interest

Certain of the underwriters or their affiliates may hold a portion of the indebtedness that we intend to repay using the net proceeds of this offering. In such event, it is possible that one or more of the underwriters or their affiliates could receive more than 5% of the net proceeds of the offering, and in that case such underwriter would be deemed to have a conflict of interest under FINRA Rule 5121 (Public Offerings of Securities with Conflicts of Interest). In the event of any such conflict of interest, such underwriter would be required to conduct the distribution of the junior subordinated debentures in accordance with FINRA Rule 5121. If the distribution is conducted in accordance with FINRA Rule 5121, such underwriter would not be permitted to confirm a sale to an account over which it exercises discretionary authority without first receiving specific written approval from the account holder.

Notice to Investors

This prospectus supplement does not constitute an offer to sell to, or a solicitation of an offer to buy from, anyone in any country or jurisdiction (i) in which such an offer or solicitation is not authorized, (ii) in which any person making such offer or solicitation is not qualified to do so or (iii) in which any such offer or solicitation would otherwise be unlawful. No action has been taken that would, or is intended to, permit a public offer of the junior subordinated debentures or possession or distribution of this prospectus or any other offering or publicity material relating to the junior subordinated debentures in any country or jurisdiction (other than the United States) where any such action for that purpose is required.

Canada

The junior subordinated debentures may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations . Any resale of the junior subordinated debentures must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement and the accompanying prospectus (including any amendment thereto) contain a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser's province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser's province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts ("NI 33-105"), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

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European Economic Area

The junior subordinated debentures are not intended to be offered, sold or otherwise made available to, and should not be offered, sold or otherwise made available to, any retail investor in the European Economic Area ("EEA"). For the purposes of this provision, the expression "retail investor" means a person who is one (or more) of the following: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, "MiFID II"); (ii) a customer within the meaning of Directive (EU) 2016/97 (as amended), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not a qualified investor as defined in Regulation (EU) 2017/1129 (as amended, the "Prospectus Regulation"). Consequently, no key information document required by Regulation (EU) No 1286/2014 (as amended, the "PRIIPs Regulation") for offering or selling the junior subordinated debentures or otherwise making them available to retail investors in the EEA has been prepared, and therefore offering or selling the junior subordinated debentures or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation.

This prospectus supplement and the accompanying prospectus have been prepared on the basis that any offer of junior subordinated debentures in any member state of the EEA will be made pursuant to an exemption under the Prospectus Regulation from the requirement to publish a prospectus for offers of junior subordinated debentures. This prospectus supplement and the accompanying prospectus are not a prospectus for the purposes of the Prospectus Regulation.

Japan

The junior subordinated debentures have not been, and will not be, registered pursuant to Article 4, Paragraph 1 of the Financial Instruments and Exchange Act of Japan (Act No. 25 of 1948, as amended) (the "FIEL") and the junior subordinated debentures have not been offered or sold and will not be offered or sold, directly or indirectly, in Japan or to, or the account for or for the benefit of, any "resident" of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to, or the account for or for the benefit of, any resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the FIEL and any other applicable laws, regulations and ministerial guidelines of Japan in effect at the relevant time.

Singapore

This prospectus supplement and the accompanying prospectus have not been and will not be registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus supplement, the accompanying prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the junior subordinated debentures may not be circulated or distributed, nor may the junior subordinated debentures be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor under Section 274 of the Securities and Futures Act, Chapter 289 of Singapore (the "SFA"), (ii) to a relevant person pursuant to Section 275(1), or any person pursuant to Section 275(1A), and in accordance with the conditions, specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA.

Where the junior subordinated debentures are subscribed or purchased under Section 275 of the SFA by a relevant person which is: (a) a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor; or (b) a trust (where the trustee is not an accredited investor) whose sole purpose is to hold investments and each beneficiary of the trust is an individual who is an accredited investor, securities (as defined in Section 239(1) of the SFA) of that corporation or the beneficiaries'

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rights and interest (howsoever described) in that trust shall not be transferable for six months after that corporation or that trust has acquired the junior subordinated debentures pursuant to an offer made under Section 275 of the SFA except: (1) to an institutional investor or to a relevant person defined in Section 275(2) of the SFA, or to any person arising from an offer referred to in Section 275(1A) or Section 276(4)(i)(B) of the SFA, (2) where no consideration is given for the transfer, (3) where the transfer is by operation of law, (4) as specified in Section 276(7) of the SFA, or (5) as specified in Regulation 37A of the Securities and Futures (Offers of Investments) (Securities and Securities-based Derivatives Contracts) Regulations 2018 of Singapore.

In connection with Section 309B of the SFA and the Securities and Futures (Capital Markets Products) Regulations 2018 (the "CMP Regulations 2018"), unless otherwise specified before an offer of junior subordinated debentures, we have determined, and hereby notify all relevant persons (as defined in Section 309A of the SFA) that the junior subordinated debentures are "prescribed capital markets products" (as defined in the CMP Regulations 2018) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

South Korea

The junior subordinated debentures have not been, and will not be, registered with the Financial Services Commission of Korea under the Financial Investment Services and Capital Markets Act of Korea. Accordingly, the junior subordinated debentures have not been, and will not be, offered, sold or delivered, directly or indirectly, in Korea or to, or for the account or benefit of, any resident of Korea (as defined in the Foreign Exchange Transactions Law of Korea and its Enforcement Decree) or to others for re-offering or resale, except as otherwise permitted by applicable Korean laws and regulations. In addition, within one year following the issuance of the junior subordinated debentures, the junior subordinated debentures may not be transferred to any resident of Korea other than a qualified institutional buyer (as such term is defined in the regulation on issuance, public disclosure, etc. of securities of Korea, a "Korean QIB") registered with the Korea Financial Investment Association (the "KOFIA") as a Korean QIB and subject to the requirement of monthly reports with the KOFIA of its holding of Korean QIB bonds as defined in the Regulation on Issuance, Public Disclosure, etc. of bonds of Korea, provided that (a) the junior subordinated debentures are denominated, and the principal and interest payments thereunder are made, in a currency other than Korean won, (b) the amount of the securities acquired by such Korean QIBs in the primary market is limited to less than 20% of the aggregate issue amount of the junior subordinated debentures, (c) the junior subordinated debentures are listed on one of the major overseas securities markets designated by the Financial Supervisory Service of Korea, or certain procedures, such as registration or report with a foreign financial investment regulator, have been completed for offering of the securities in a major overseas securities market, (d) the one-year restriction on offering, delivering or selling of securities to a Korean resident other than a Korean QIB is expressly stated in the junior subordinated debentures, the underwriting agreement and this prospectus supplement and (e) we and the underwriters shall individually or collectively keep the evidence of fulfillment of conditions described in clauses (a) through (d) above after having taken necessary actions therefor.

Switzerland

This prospectus supplement and the accompanying prospectus are not intended to constitute an offer or solicitation to purchase or invest in the junior subordinated debentures. The junior subordinated debentures may not be publicly offered, directly or indirectly, in Switzerland within the meaning of the Swiss Financial Services Act ("FinSA") and no application has or will be made to admit the junior subordinated debentures to trading on any trading venue (exchange or multilateral trading facility) in Switzerland. Neither this prospectus supplement and the accompanying prospectus nor any other offering or marketing material relating to the junior subordinated debentures constitutes a prospectus pursuant to the FinSA or a listing prospectus within the meaning of the listing rules of the Swiss Exchange or any other regulated trading facility in Switzerland, and neither this prospectus supplement and the accompanying prospectus nor any other offering or marketing material relating to the junior subordinated debentures may be publicly distributed or otherwise made publicly available in Switzerland.

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Taiwan

The junior subordinated debentures have not been and will not be registered with the Financial Supervisory Commission of Taiwan, the Republic of China ("Taiwan") pursuant to relevant securities laws and regulations and may not be offered or sold in Taiwan through a public offering or in any manner which would constitute an offer within the meaning of the Securities and Exchange Act of Taiwan or would otherwise require registration or filing with or the approval of the Financial Supervisory Commission of Taiwan. No person or entity in Taiwan has been authorized or will be authorized to offer, sell, give advice regarding or otherwise intermediate the offering or sale of the junior subordinated debentures in Taiwan.

United Arab Emirates

The junior subordinated debentures have not been, and are not being, publicly offered, sold, promoted or advertised in the United Arab Emirates (including the Dubai International Financial Centre or the Abu Dhabi Global Market) other than in compliance with the laws of the United Arab Emirates (and the Dubai International Financial Centre Abu Dhabi Global Market) governing the issue, offering and sale of securities. Further, this prospectus supplement and the accompanying prospectus do not constitute a public offer of securities in the United Arab Emirates (including the Dubai International Financial Centre and the Abu Dhabi Global Market) and are not intended to be a public offer. This prospectus supplement and the accompanying prospectus have not been approved by or filed with the Central Bank of the United Arab Emirates, the Securities and Commodities Authority or the Dubai Financial Services Authority or the Abu Dhabi Global Market's Financial Services RegualtoryAuthority (FSRA).

United Kingdom

Each underwriter has represented and agreed that it has not made and will not make an offer of the junior subordinated debentures which are the subject of the offering contemplated by this prospectus supplement to the public in the United Kingdom, except that it may make an offer of such junior subordinated debentures to the public in the United Kingdom:(a) at any time to any legal entity which is a qualified investor as defined in paragraph 15 of Schedule 1 to the POATRs;(b) at any time to fewer than 150 natural or legal persons (other than qualified investors as defined in paragraph 15 of Schedule 1 of the POATRs) in the United Kingdom, subject to obtaining the prior consent of the relevant underwriter or underwriters nominated by us for any such offer; or(c) at any time in any other circumstances falling within Part 1 of Schedule 1 to the POATRs. For the purposes of this provision, the expression "an offer of junior subordinated debentures to the public" in relation to any junior subordinated debentures, means the communication in any form and by any means of sufficient information on the terms of the offer and the junior subordinated debentures to be offered so as to enable an investor to decide to purchase or subscribe for the junior subordinated debentures, and the expression "POATRs" means the Public Offers and Admissions to Trading Regulations 2024.The junior subordinated debentures are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the United Kingdom (the "UK"). For these purposes a "retail investor" means a person who is neither: (i) a professional client, as defined in point (8) of Article 2 of Regulation (EU) No 600/2014 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018 (as amended, the "EUWA"); nor (ii) a qualified investor as defined in paragraph 15 of Schedule 1 to the POATRs. The expression "offer" includes the communication in any form and by any means of sufficient information on the terms of the offer and the junior subordinated debentures to be offered so as to enable an investor to decide to purchase or subscribe for the junior subordinated debentures. Consequently, no key information document required by the PRIIPs Regulation as it forms part of domestic law by virtue of the EUWA (the "UK PRIIPs Regulation") for offering or selling the junior subordinated debentures or otherwise making them available to retail investors in the UK has been prepared and therefore offering or selling the junior subordinated debentures or otherwise making them available to any retail investor in the UK may be unlawful under the UK PRIIPs Regulation. This prospectus supplement and the accompanying prospectus have been prepared on the basis that this offering falls within one of the exceptions specified in Part 1 of Schedule 1 to the POATRs. Accordingly, there will not be a prospectus prepared or published for the purposes of the POATRs. This prospectus supplement and the accompanying prospectus are

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not a prospectus for the purposes of the POATRs or the Financial Services and Markets Act 2000 (the "FSMA"), and any offer of the junior subordinated debentures in the United Kingdom is made pursuant to an exemption under the POATRs or the FSMA.

This prospectus supplement and the accompanying prospectus are for distribution only to persons in the United Kingdom who are "qualified investors" (as defined in the paragraph 15 of Schedule 1 to the POATRs) and (a) have professional experience in matters relating to investments and who qualify as investment professionals within the meaning of Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (as amended, the "Financial Promotion Order"), (b) are persons falling within Article 49(2)(a) to (d) ("high net worth companies, unincorporated associations etc.") of the Financial Promotion Order, or (c) are persons to whom an invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of any securities may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as "Relevant Persons"). This prospectus supplement and the accompanying prospectus are directed only at Relevant Persons and must not be acted on or relied on by persons who are not Relevant Persons. Any investment or investment activity to which this document relates is available only to Relevant Persons and will be engaged in only with Relevant Persons.

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LEGAL MATTERS

The validity of the junior subordinated debentures and certain other legal matters relating to this offering will be passed upon for DTE Energy by Kathrine Lorenz, Senior Vice President and Chief Legal Officer. Ms. Lorenz beneficially owns shares of DTE Energy common stock. Certain legal matters, including matters relating to United States federal income tax considerations, will be passed upon for DTE Energy by Hunton Andrews Kurth LLP, New York, New York.

Certain legal matters relating to this offering will be passed upon for the underwriters by Bracewell LLP, Houston, Texas. Bracewell LLP has from time to time represented, and may in the future continue to represent, certain of our affiliates in certain matters unrelated to this offering.

EXPERTS

The financial statements of DTE Energy and management's assessment of the effectiveness of internal control over financial reporting (which is included in Management's Report on Internal Control over Financial Reporting) incorporated in this Prospectus Supplement by reference to the Annual Report on Form 10-K of DTE Energy for the year ended December 31, 2025 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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Prospectus

DTE Energy Company

Common Stock

Debt Securities

Stock Purchase Contracts

Stock Purchase Units

By this prospectus, DTE Energy Company may offer from time to time:

We will provide specific terms of the securities, including the offering prices, in supplements to this prospectus. The supplements may also add, update or change information contained in this prospectus. You should read this prospectus and any supplements carefully before you invest.

We may offer these securities directly or through underwriters, agents or dealers. This prospectus may also be used by a selling security holder of the securities described herein. The supplements to this prospectus will describe the terms of any particular plan of distribution, including any underwriting arrangements, and will identify any selling security holders. See the "Plan of Distribution" section beginning on page 32 of this prospectus for more information.

See "Risk Factors" beginning on page 3 regarding risks associated with an investment in these securities.

The mailing address of DTE Energy Company's principal executive office is One Energy Plaza, Detroit, Michigan 48226-1221, and its telephone number is (313) 235-4000.

DTE Energy Company's common stock is traded on the New York Stock Exchange under the symbol "DTE."

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

This prospectus is dated April 4, 2025

TABLE OF CONTENTS

You should rely only on the information contained or incorporated by reference in this prospectus and the applicable prospectus supplement or supplements. We have not authorized any person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. You should not assume that the information contained or incorporated in this prospectus is accurate as of any time after the date of this prospectus, or, if later, the date of an incorporated document, because our business, financial condition, results of operations and prospects may have changed since such dates.

1

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that DTE Energy filed with the Securities and Exchange Commission ("SEC") utilizing a "shelf" registration process. Under this shelf registration process, DTE Energy may sell any combination of the securities described in this prospectus in one or more offerings.

This prospectus provides you with a general description of the securities DTE Energy may offer. Each time DTE Energy sells securities, DTE Energy will provide a prospectus supplement that will contain specific information about the terms of that offering. The prospectus supplement may also add, update or change information contained in this prospectus. You should read this prospectus and any prospectus supplement together with the additional information described below under the heading "Where You Can Find More Information."

For more detailed information about the securities, you can read the exhibits to the registration statement. Those exhibits have been either filed with the registration statement or incorporated by reference to earlier SEC filings listed in the registration statement.

We are not making an offer to sell these securities in any jurisdiction that prohibits the offer or sale of these securities.

In this prospectus references to "DTE Energy," the "Company," "we," "us" and "our" refer to DTE Energy Company, unless the context indicates that the references are to DTE Energy Company and its consolidated subsidiaries.

2

RISK FACTORS

An investment in the securities involves risks. You should carefully consider the "Risk Factors" set forth in our most recent Annual Report on Form 10-K and Quarterly Reports on Form 10-Q, together with the other information in this prospectus, any applicable prospectus supplement, and the documents that are incorporated by reference in this prospectus, about risks concerning the securities, before buying any securities. See also "Cautionary Statements Regarding Forward-Looking Statements" below.

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CAUTIONARY STATEMENTS REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the documents incorporated by reference in this prospectus contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 (the "Securities Act") and Section 21E of the Securities Exchange Act of 1934 (the "Exchange Act"), with respect to the financial condition, results of operations and business of DTE Energy. You can find many of these statements by looking for words such as "anticipate," "believe," "expect," "may," "could," "projected," "aspiration," "plans," and "goals" or similar expressions in this prospectus or in documents incorporated herein that signify forward-looking statements. Forward-looking statements are not guarantees of future results and conditions, but rather are subject to numerous assumptions, risks, and uncertainties that may cause actual future results to be materially different from those contemplated, projected, estimated, or budgeted. Many factors may impact our forward-looking statements including, but not limited to, the following:

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New factors emerge from time to time. We cannot predict what factors may arise or how such factors may cause results to differ materially from those contained in any forward-looking statement. Any forward-looking statements speak only as of the date on which such statements are made. We undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events.

The factors discussed above and other factors are discussed more completely in our public filings with the SEC including our most recent Annual Report on Form 10-K.

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DTE ENERGY COMPANY

DTE Energy Company is a Michigan corporation with utility operations consisting primarily of DTE Electric Company ("DTE Electric") and DTE Gas Company ("DTE Gas"). DTE Energy also has two other segments that are engaged in a variety of energy-related businesses.

DTE Electric is a Michigan corporation organized in 1903 and is an indirect wholly-owned subsidiary of DTE Energy. DTE Electric is a public utility engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.3 million customers in southeastern Michigan.

DTE Gas is a Michigan corporation organized in 1898 and is an indirect, wholly-owned subsidiary of DTE Energy. DTE Gas is a public utility engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million customers throughout Michigan and the sale of storage and transportation capacity.

DTE Energy's non-utility operations include:

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USE OF PROCEEDS

Except as we may otherwise state in an accompanying prospectus supplement, DTE Energy expects to use the net proceeds from the sale of its securities for general corporate purposes, which may include, among other things:

The precise amount and timing of the application of such proceeds will depend upon our funding requirements, market conditions and the availability and cost of other funds. Pending the application of proceeds, we may also invest the funds temporarily in short-term investment grade securities.

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THE SECURITIES THAT WE MAY OFFER

The descriptions of the securities contained in this prospectus, together with the applicable prospectus supplements, summarize certain terms and provisions of the various types of securities that DTE Energy may offer. The particular terms of the securities offered by any prospectus supplement will be described in that prospectus supplement. If indicated in the applicable prospectus supplement, the terms of the securities may differ from the terms summarized below. The prospectus supplement will also contain information, where applicable, about material U.S. federal income tax considerations relating to the securities, and any securities exchange on which the securities may be listed.

We may sell from time to time, in one or more offerings:

In this prospectus, we refer to the common stock, senior debt securities, subordinated debt securities, stock purchase contracts and stock purchase units together as "securities." We refer to the senior debt securities and the subordinated debt securities together as the "debt securities."

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DESCRIPTION OF CAPITAL STOCK

Authorized Capital Stock

The authorized capital stock of DTE Energy currently consists of 400,000,000 shares of DTE Energy common stock, without par value, and 5,000,000 shares of preferred stock, without par value. As of December 31, 2024, there were 207,171,582 shares of DTE Energy common stock issued and outstanding. All outstanding shares of common stock are, and the common stock offered hereby when issued and paid for will be, duly authorized, validly issued, fully paid and nonassessable. As of December 31, 2024, there were no shares of preferred stock issued and outstanding.

Under the DTE Energy amended and restated articles of incorporation, which we refer to as the articles of incorporation, our board of directors may cause the issuance of one or more new series of the authorized shares of preferred stock, determine the number of shares constituting any such new series and fix the voting, distribution, dividend, liquidation and all other rights and limitations of the preferred stock. These rights may be superior to those of the DTE Energy common stock. To the extent any shares of DTE Energy's preferred stock have voting rights, no share of preferred stock may be entitled to more than one vote per share.

Common Stock

The following description of our common stock, together with the additional information included in any applicable prospectus supplement, summarizes the material terms and provisions of this type of security. For the complete terms of our common stock, please refer to our articles of incorporation and bylaws that are incorporated by reference into the registration statement that includes this prospectus or may be incorporated by reference in this prospectus. The terms of our common stock may also be affected by the laws of the State of Michigan.

Dividends

Holders of common stock are entitled to participate equally in respect to dividends as, when and if dividends are declared by our board of directors out of funds legally available for their payment. However, this dividend right is subject to any preferential dividend rights we may grant to future holders of preferred stock and to the prior rights of DTE Energy's debt holders and other creditors. As a Michigan corporation, we are subject to statutory limitations on the declaration and payment of dividends. Dividends on DTE Energy common stock will depend primarily on the earnings and financial condition of DTE Energy. DTE Energy is a holding company and its assets consist primarily of its investment in its operating subsidiaries. Thus, as a practical matter, dividends on common stock of DTE Energy will depend in the foreseeable future primarily upon the earnings, financial condition and capital requirements of DTE Electric, DTE Gas and our other subsidiaries, and the distribution of such earnings to DTE Energy in the form of dividends. The subsidiaries are separate and distinct legal entities and have no obligation to make payments with respect to any of DTE Energy's securities, or to pay dividends to or make funds available to DTE Energy so that DTE Energy can make payments on its securities, including its common stock. In addition, existing or future covenants limiting the right of DTE Electric, DTE Gas or our other subsidiaries to pay dividends on or make other distributions with respect to their common stock may affect DTE Energy's ability to pay dividends on its common stock. See "Description of Debt Securities - Ranking."

Voting

Subject to any special voting rights that may vest in the holders of preferred stock, the holders of DTE Energy common stock are entitled to vote as a class and are entitled to one vote per share for each share held of record on all matters voted on by shareholders. All questions are decided by a majority of the votes cast by the holders of shares entitled to vote on that question, unless a greater or different vote is required by the articles of incorporation or Michigan law. However, if the number of director nominees for any director election exceeds the number of directors to be elected, the nominees receiving a plurality of the votes cast by holders of the shares entitled to vote at any meeting for the election of directors at which a quorum is present will be elected.

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We are subject to Chapter 7A of the Michigan Business Corporation Act, which we refer to as the Corporation Act, which provides that business combinations subject to Chapter 7A between a Michigan corporation and a beneficial owner of shares entitled to 10% or more of the voting power of such corporation generally require the affirmative vote of 90% of the votes of each class of stock entitled to vote, and not less than 2/3 of each class of stock entitled to vote (excluding voting shares owned by such 10% owner), voting as a separate class. These requirements do not apply if (1) the corporation's board of directors approves the transaction prior to the time the 10% owner becomes such or (2) the transaction satisfies certain fairness standards, certain other conditions are met and the 10% owner has been such for at least five years.

Board of Directors

The number of directors is fixed by the board of directors from time to time. DTE Energy currently has 13 directors. Directors are elected annually for terms which expire upon election of their successor at the next year's annual shareholder meeting.

Amendments to DTE Energy's Articles of Incorporation

Under Michigan law, our articles of incorporation may be amended by the affirmative vote of the holders of a majority of the outstanding shares entitled to vote on the proposed amendment (which would include the common stock and any series of preferred stock which, by its terms or applicable law, was so entitled to vote), and, if any class or series of shares is entitled to vote as a class, then the proposed amendment must be approved by the required vote of each class or series of shares entitled to vote as a class.

Liquidation Rights

In the event of a liquidation, dissolution or winding-up of DTE Energy, holders of our common stock have the right to share in DTE Energy's assets remaining after satisfaction in full of the prior rights of creditors, and all liabilities and the aggregate liquidation preferences of any outstanding shares of DTE Energy preferred stock.

Preemptive Rights

The holders of DTE Energy common stock have no conversion or redemption rights, or any rights to subscribe for or purchase other stock of DTE Energy.

Listing

Our common stock is listed on the New York Stock Exchange under the symbol "DTE."

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Equiniti Trust Company, P.O. Box 64874, St. Paul, MN 55164-0854.

Advance Notice Requirements; Possible Anti-Takeover Effects

Certain provisions of our articles of incorporation and bylaws may have the effect of discouraging unilateral tender offers or other attempts to take over and acquire the business of DTE Energy. Our bylaws provide that shareholders seeking to nominate candidates for election as directors or to bring business before an annual meeting of shareholders or a shareholder-requested special meeting of shareholders must deliver timely notice of their proposal in writing to our principal executive offices. Our bylaws also specify requirements as to the form and content of a shareholder's notice. These provisions may impede shareholders' ability to bring matters before an annual meeting of shareholders, a shareholder requested special meeting of shareholders or make nominations

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for directors. These provisions may limit the ability of individuals to bring matters before shareholder meetings, change the composition of the board of directors and pursue a merger, takeover, business combination or tender offer involving DTE Energy, which, under certain circumstances, could encourage a potentially interested purchaser to negotiate with the board of directors rather than pursue a non-negotiated takeover attempt, including one that shareholders might favor, and could reduce the market value of our common stock.

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DESCRIPTION OF DEBT SECURITIES

The following description, together with any applicable prospectus supplement, summarizes certain material terms and provisions of the debt securities we may offer under this prospectus and the related indenture. We will issue the debt securities under an amended and restated indenture, dated as of April 9, 2001, as supplemented or amended from time to time, which we refer to as the "indenture," between DTE Energy and The Bank of New York Mellon Trust Company, N.A., as successor trustee. We refer to The Bank of New York Mellon Trust Company, N.A., or any successor or additional trustee, in its capacity as trustee under the indenture, as the "trustee" for purposes of this section. The indenture may, but need not, have separate trustees for senior and subordinated debt securities.

This summary of the indenture and the debt securities relates to terms and conditions applicable to the debt securities generally. The particular terms of any series of debt securities will be summarized in the applicable prospectus supplement. If indicated in the prospectus supplement, the terms of any series may differ from the terms summarized below.

Because the descriptions of provisions of the indenture below are summaries, they do not describe every aspect of the indenture. The summaries below are subject to, and are qualified in their entirety by reference to, all provisions of the indenture, including the definitions therein of certain terms. We have filed a copy of the indenture as an exhibit to the registration statement of which this prospectus is a part. We encourage you to read the indenture for provisions that may be important to you. Wherever we refer to particular articles, sections or defined terms of the indenture, those articles, sections or defined terms are incorporated herein by reference, and the statement in connection with which such reference is made is qualified in its entirety by such reference. The indenture contains, and the debt securities, when issued, will contain, additional important terms and provisions. We will describe the particular terms of the debt securities offered by any prospectus supplement and the extent, if any, to which such general provisions may apply to the debt securities so offered in the prospectus supplement relating to those debt securities.

The indenture does not limit the amount of debt securities we may issue under it, and it provides that additional debt securities of any series may be issued up to the aggregate principal amount that we may authorize from time to time. As of December 31, 2024, approximately $7.3 billion aggregate principal amount of debt securities were issued and outstanding under the indenture. At the date of this prospectus, since December 31, 2024, we have issued $1.1 billion aggregate principal amount of debt securities.

Principal and any premium and interest in respect to the debt securities will be payable, and the debt securities will be transferable, at the corporate trust office of the trustee, unless we specify otherwise in the applicable prospectus supplement. At our option, however, payment of interest may be made by check mailed to the registered holders of the debt securities at their registered addresses.

We will describe material U.S. federal income tax and other considerations relating to debt securities denominated in foreign currencies or units of two or more foreign currencies in the applicable prospectus supplement.

Unless we otherwise specify in this prospectus or in the applicable prospectus supplement, we will issue debt securities in the form of global securities, deposited with and registered in the name of The Depository Trust Company, as depositary, which we refer to as "DTC," or its nominee. Interests in the debt securities will be shown on, and transfers thereof will be effected only through, records maintained by DTC and its participants. See "Book-Entry Securities."

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General

The prospectus supplement that accompanies this prospectus relating to the debt securities being offered will include specific terms relating to the offered debt securities. These terms may include some or all of the following:

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We are not obligated to issue all debt securities of any one series at the same time and all the debt securities of any one series need not bear interest at the same rate or mature on the same date.

Under the indenture, the terms of the debt securities of any series may differ and we, without the consent of the holders of the debt securities of any series, may reopen a previous series of debt securities and issue additional debt securities of such series or establish additional terms of such series.

Other than as described below under "- Covenants" with respect to any applicable series of debt securities and as may be described in the applicable prospectus supplement, the indenture does not limit our ability to incur indebtedness or afford holders of debt securities protection in the event of a decline in our credit quality or if we are involved in a takeover, recapitalization or highly leveraged or similar transaction. Accordingly, we could in the future enter into transactions that could increase the amount of indebtedness outstanding at that time or otherwise affect our capital structure or credit rating. You should refer to the prospectus supplement relating to a particular series of debt securities for information regarding the applicability of the covenant described below under "- Covenants - Limitation on Secured Debt" or any deletions from, modifications of or additions to the events of default described below or covenants contained in the indenture, including any addition of a covenant or other provisions providing event risk or similar protection.

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Ranking

Because DTE Energy is a holding company that conducts substantially all of its operations through subsidiaries, holders of debt securities and guarantees of DTE Energy will generally have a junior position to claims of creditors of those subsidiaries, including trade creditors, debtholders, secured creditors, taxing authorities, guarantee holders and preferred shareholders, if any. Our subsidiaries, principally DTE Electric and DTE Gas, from time to time incur debt to finance their business activities. Substantially all of the physical properties of DTE Electric and DTE Gas are subject to the liens of their respective mortgage indentures as security for the payment of outstanding mortgage bonds.

Our assets consist primarily of investment in subsidiaries. Our ability to service indebtedness, including any debt securities and guarantees, depends on the earnings of our subsidiaries and the distribution or other payment from subsidiaries of earnings to us in the form of dividends, loans or advances, and repayment of loans and advances from us. The subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to pay any amounts due under the debt securities or to make payments to us in order for us to pay our obligations under the debt securities. In addition, existing and future contractual and other legal requirements may limit the ability of our subsidiaries to pay dividends to us.

Senior Debt Securities

Unless otherwise indicated in the applicable prospectus supplement, DTE Energy's obligation to pay the principal of, and any premium and interest on, the senior debt securities will be unsecured and will rank equally with all of our other unsecured unsubordinated indebtedness.

Subordinated Debt Securities

DTE Energy's obligation to pay the principal of, and any premium and interest on, any series of subordinated debt securities will be unsecured and will rank subordinate and junior in right of payment to all Senior Indebtedness (as defined below) to the extent provided in the supplemental indenture relating to the series and the terms of those subordinated debt securities, as described below and in any applicable prospectus supplement, which may make deletions from, or modifications or additions to, the subordination terms described below.

Upon any payment or distribution of assets or securities of DTE Energy to creditors upon any liquidation, dissolution, winding-up, reorganization, or any bankruptcy, insolvency, receivership or similar proceedings in connection with any insolvency or bankruptcy proceeding of DTE Energy, the holders of Senior Indebtedness will first be entitled to receive payment in full of the Senior Indebtedness before the holders of subordinated debt securities will be entitled to receive any payment or distribution in respect of the subordinated debt securities, and to that end the holders of Senior Indebtedness will be entitled to receive, for application to the payment thereof, any payment or distribution of any kind or character, whether in cash, property or securities, including any such payment or distribution that may be payable or deliverable by reason of the payment of any other Indebtedness of DTE Energy being subordinated to the payment of subordinated debt securities of such series, which may be payable or deliverable in respect of the subordinated debt securities of such series upon any such dissolution, winding-up, liquidation or reorganization or in any such bankruptcy, insolvency, receivership or other proceeding.

By reason of such subordination, in the event of liquidation or insolvency of DTE Energy, holders of Senior Indebtedness with respect to the subordinated debt securities of any series and holders of other obligations of DTE Energy that are not subordinated to such Senior Indebtedness may recover more, ratably, than the holders of the subordinated debt securities of such series.

Subject to the payment in full of all Senior Indebtedness with respect to the subordinated debt securities of any series, the rights of the holders of the subordinated debt securities of such series will be subrogated to the

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rights of the holders of Senior Indebtedness to receive payments or distributions of cash, property or securities of DTE Energy applicable to such Senior Indebtedness until the principal of, any premium and interest on, and any additional amounts with respect to, the subordinated debt securities of such series have been paid in full.

No payments on account of principal or any premium or interest in respect of the subordinated debt securities may be made if there has occurred and is continuing a default in any payment with respect to Senior Indebtedness or an event of default with respect to any Senior Indebtedness resulting in the acceleration of its maturity, or if any judicial proceeding is pending with respect to any default.

"Indebtedness" means:

"Senior Indebtedness," for purposes of subordinated debt securities of each series, means all Indebtedness, whether outstanding on the date of issuance of subordinated debt securities of the applicable series or thereafter created, assumed or incurred, except Indebtedness ranking equally with the subordinated debt securities or Indebtedness ranking junior to the subordinated debt securities. Senior Indebtedness does not include obligations to trade creditors or indebtedness of DTE Energy to its subsidiaries. Senior Indebtedness with respect to the subordinated debt securities of any particular series will continue to be Senior Indebtedness with respect to the subordinated debt securities of such series and be entitled to the benefits of the subordination provisions irrespective of any amendment, modification or waiver of any term of such Senior Indebtedness.

"Indebtedness ranking equally with the subordinated debt securities," for purposes of subordinated debt securities of the applicable series, means Indebtedness, whether outstanding on the date of issuance of the subordinated debt securities or thereafter created, assumed or incurred, to the extent the Indebtedness specifically by its terms ranks equally with and not prior to the subordinated debt securities in the right of payment upon the happening of the dissolution, winding-up, liquidation or reorganization of DTE Energy. The securing of any Indebtedness otherwise constituting Indebtedness ranking equally with the subordinated debt securities will not prevent the Indebtedness from constituting Indebtedness ranking equally with the subordinated debt securities.

"Indebtedness ranking junior to the subordinated debt securities," for purposes of subordinated debt securities of the applicable series, means any Indebtedness, whether outstanding on the date of issuance of the

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subordinated debt securities of the applicable series or thereafter created, assumed or incurred, to the extent the Indebtedness by its terms ranks junior to and not equally with or prior to:

in right of payment upon the happening of the dissolution, winding-up, liquidation or reorganization of DTE Energy. The securing of any Indebtedness otherwise constituting Indebtedness ranking junior to the subordinated debt securities will not prevent the Indebtedness from constituting Indebtedness ranking junior to the subordinated debt securities.

Covenants

The indenture contains covenants for the benefit of holders of debt securities of each series. The following covenant will apply to a series of debt securities only to the extent specified in the applicable prospectus supplement.

Limitation on Secured Debt

If this covenant is made applicable to the debt securities of any particular series, we have agreed that we will not create, issue, incur or assume any Secured Debt (as defined below) without the consent of the holders of a majority in principal amount of the outstanding debt securities of all series with respect to which this covenant is made, considered as one class; provided, however, that the foregoing covenant will not prohibit the creation, issuance, incurrence or assumption of any Secured Debt if we either:

"Debt" means:

"Lien" means any mortgage, pledge, security interest, encumbrance, lien or charge of any kind (including, without limitation, any conditional sale or other title retention agreement or lease in the nature thereof or any agreement to give any security interest).

"Secured Debt" means Debt created, issued, incurred or assumed by DTE Energy that is secured by a Lien upon any shares of stock of any Significant Subsidiary, as defined in Regulation S-X of the rules and regulations under the Securities Act, whether owned at the date of the initial authentication and delivery of the debt securities of any series or thereafter acquired.

Consolidation, Merger and Sale of Assets

DTE Energy may, without the consent of the holders of the debt securities, consolidate or merge with or into, or convey, transfer or lease our properties and assets as an entirety or substantially as an entirety to, any

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person or permit any person to consolidate with or merge into us or convey, transfer or lease its properties and assets substantially as an entirety to us, as long as:

Upon any merger or consolidation described above or conveyance or transfer of the properties and assets of DTE Energy as or substantially as an entirety as described above, the successor person will succeed to DTE Energy's obligations under the indenture and, except in the case of a lease, the predecessor person will be relieved of such obligations.

The indenture does not prevent or restrict any conveyance or other transfer, or lease, of any part of the properties of DTE Energy which does not constitute the entirety, or substantially the entirety, thereof.

Events of Default

Unless otherwise specified in the applicable prospectus supplement, an event of default with respect to any series of debt securities will be any of the following events:

(1) failure to pay interest on the debt securities of that series, or any additional amounts payable with respect thereto, for 30 days after payment is due;

(2) failure to pay principal or any premium on the debt securities of that series, or any additional amounts payable with respect thereto, when due;

(3) failure to pay any sinking fund installment or analogous payment when due;

(4) failure to perform, or breach of, any other covenant or warranty or obligation of DTE Energy in the indenture for 60 days after we are given written notice by the trustee or we and the trustee are given written notice by the registered owners of at least 25% in principal amount of the debt securities of that series;

(5) default occurs under any bond, note, debenture or other instrument evidencing any indebtedness for money borrowed by DTE Energy (including a default with respect to any other series of debt securities issued under the indenture), or under any mortgage, indenture or other instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by DTE Energy (or the payment of which is guaranteed by DTE Energy), whether such indebtedness or guarantee exists on the date of the indenture or is issued or entered into following the date of the indenture, if:

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(6) certain events of bankruptcy, insolvency, reorganization, receivership or liquidation relating to DTE Energy; or

(7) any other event of default provided with respect to debt securities of that series.

If an event of default with respect to the debt securities of any series occurs and is continuing, either the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series may declare the principal amount of the debt securities of that series to be due and payable immediately. At any time after a declaration of acceleration has been made, but before a judgment or decree for payment of money has been obtained by the trustee, and subject to applicable law and certain other provisions of the indenture, the holders of a majority in aggregate principal amount of the debt securities of that series may, under certain circumstances, rescind and annul the acceleration. If an event of default occurs pertaining to certain events of bankruptcy, insolvency or reorganization specified in the indenture as described in paragraph (6) above, the principal amount and accrued and unpaid interest and any additional amounts payable in respect of the debt securities of that series, or a lesser amount as provided for in the debt securities of that series, will be immediately due and payable without any declaration or other act by the trustee or any holder.

The indenture provides that within 90 days after the occurrence of any default under the indenture with respect to the debt securities of any series, the trustee must transmit to the holders of the debt securities of such series, in the manner set forth in the indenture, notice of the default known to the trustee, unless the default has been cured or waived. However, except in the case of a default in the payment of the principal of (or premium, if any) or interest or any additional amounts or in the payment of any sinking fund installment with respect to, any debt security of such series, the trustee may withhold such notice if and so long as the board of directors, the executive committee or a trust committee of directors or responsible officers of the trustee has in good faith determined that the withholding of such notice is in the interest of the holders of debt securities of such series. In addition, in the case of any event of default described in paragraph (4) above, no such notice to holders will be given until at least 30 days after the occurrence of the event of default.

If an event of default occurs and is continuing with respect to the debt securities of any series, the trustee may in its discretion proceed to protect and enforce its rights and the rights of the holders of debt securities of such series by all appropriate judicial proceedings.

The indenture further provides that, subject to the duty of the trustee during any default to act with the required standard of care, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request or direction of any of the holders of debt securities, unless that requesting holder has offered to the trustee reasonable indemnity. Subject to such provisions for the indemnification of the trustee, and subject to applicable law and certain other provisions of the indenture, the holders of a majority in aggregate principal amount of the outstanding debt securities of a series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee, with respect to the debt securities of such series.

The indenture provides that no holder of any debt security of a series will have any right to institute any proceeding with respect to the indenture for the appointment of a receiver or for any other remedy thereunder unless:

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Furthermore, no holder will be entitled to institute any such action if and to the extent that such action would disturb or prejudice the rights of other holders.

However, each holder has an absolute and unconditional right to receive payment when due and to bring a suit to enforce that right.

Under the indenture, we are required to furnish to the trustee annually a statement as to our performance of certain of our obligations under the indenture and as to any default in such performance. We are also required to deliver to the trustee, within five days after occurrence thereof, written notice of any event that after notice or lapse of time or both would constitute an event of default.

Interest Rates and Discounts

The debt securities will earn interest at a fixed or floating rate or rates for the period or periods of time specified in the applicable prospectus supplement. Unless otherwise specified in the applicable prospectus supplement, the debt securities will bear interest on the basis of a 360-day year consisting of twelve 30-day months.

We may sell debt securities at a substantial discount below their stated principal amount, bearing no interest or interest at a rate that at the time of issuance is below market rates. Material U.S. federal income tax consequences and special considerations that apply to any series will be described in the applicable prospectus supplement.

Exchange, Registration and Transfer

Registered securities of any series that are not global securities will be exchangeable for other registered securities of the same series and of like aggregate principal amount and tenor in different authorized denominations. In addition, if debt securities of any series are issuable as both registered securities and bearer securities, the holder may choose, upon written request, and subject to the terms of the indenture, to exchange bearer securities and the appropriate related coupons of that series into registered securities of the same series of any authorized denominations and of like aggregate principal amount and tenor. Bearer securities with attached coupons surrendered in exchange for registered securities between a regular record date or a special record date and the relevant date for interest payment shall be surrendered without the coupon relating to the interest payment date. Interest will not be payable with respect to the registered security issued in exchange for that bearer security. That interest will be payable only to the holder of the coupon when due in accordance with the terms of the indenture. Bearer securities will not be issued in exchange for registered securities.

Holders may present registered securities for registration of transfer, together with a duly executed form of transfer, at the office of the security registrar or at the office of any transfer agent designated by us for that purpose with respect to any series of debt securities and referred to in the applicable prospectus supplement. This may be done without service charge but upon payment of any taxes and other governmental charges as described in the indenture. The security registrar or the transfer agent will effect the transfer or exchange upon being satisfied with the documents of title and identity of the person making the request. We have appointed the trustee

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as security registrar for the indenture. If a prospectus supplement refers to any transfer agents initially designated by us with respect to any series of debt securities in addition to the security registrar, we may at any time rescind the designation of any of those transfer agents or approve a change in the location through which any of those transfer agents acts. However, if debt securities of a series are issuable solely as registered securities, we will be required to maintain a transfer agent in each place of payment for that series, and if debt securities of a series are issuable as bearer securities, we will be required to maintain a transfer agent in a place of payment for that series located outside the United States in addition to the security registrar. We may at any time designate additional transfer agents with respect to any series of debt securities.

In the event of any redemption, we will not be required to:

Payment and Paying Agents

Unless we specify otherwise in the applicable prospectus supplement, payment of principal of, and any premium and interest on, bearer securities will be payable in accordance with any applicable laws and regulations, at the offices of those paying agents outside the United States that we may designate at various times. We will make interest payments on bearer securities and the attached coupons on any interest payment date only against surrender of the coupon relating to that interest payment date. No payment with respect to any bearer security will be made at any of our offices or agencies in the United States by check mailed to any U.S. address or by transfer to an account maintained with a bank located in the United States. If, however, but only if, payment in U.S. dollars of the full amount of principal of, and any premium and interest on, bearer securities denominated and payable in U.S. dollars at all offices or agencies outside the United States is illegal or effectively precluded by exchange controls or other similar restrictions, then those payments will be made at the office of our paying agent in the Borough of Manhattan, The City of New York.

Unless we specify otherwise in the applicable prospectus supplement, payment of principal of, and any premium and interest on, registered securities will be made at the office of the paying agent or paying agents that we designate at various times. However, at our option, we may make interest payments by check mailed to the address, as it appears in the security register, of the person entitled to the payments. Unless we specify otherwise in the applicable prospectus supplement, we will make payment of any installment of interest on registered securities to the person in whose name that registered security is registered at the close of business on the regular record date for such interest.

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Unless we specify otherwise in the applicable prospectus supplement, the corporate trust office of the trustee in the Borough of Manhattan, The City of New York, will be designated:

We will name any paying agents outside the United States and any other paying agents in the United States initially designated by us for the debt securities in the applicable prospectus supplement. We may at any time designate additional paying agents or rescind the designation of any paying agent or approve a change in the office through which any paying agent acts. However, if debt securities of a series are issuable solely as registered securities, we will be required to maintain a paying agent in each place of payment for that series. If debt securities of a series are issuable as bearer securities, we will be required to maintain:

However, if the debt securities of that series are listed on a stock exchange located outside the United States, and if the stock exchange requires it, we will maintain a paying agent in any required city located outside the United States for those debt securities.

All monies we pay to a paying agent for the payment of principal of, and any premium or interest on, any debt security or coupon that remains unclaimed at the end of two years after becoming due and payable will be repaid to us. After that time, the holder of the debt security or coupon may look only to us for payments out of those repaid amounts.

Global Securities

The debt securities of a series may be issued in whole or in part in the form of one or more global certificates that we will deposit with a depository identified in the applicable prospectus supplement. Global securities may be issued in either registered or bearer form and in either temporary or permanent form. Unless and until it is exchanged in whole or in part for the individual debt securities it represents, a global security may not be transferred except as a whole:

To the extent not described below and under the heading "Book-Entry Securities," we will describe the terms of the depository arrangement with respect to a series of debt securities in the applicable prospectus supplement. We anticipate that the following provisions will generally apply to depository arrangements.

As long as the depository for a global security, or its nominee, is the registered owner of that global security, the depository or nominee will be considered the sole owner or holder of the debt securities represented by the

global security for all purposes under the indenture. Except as provided under "Book-Entry Securities" or in any

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applicable prospectus supplement, owners of beneficial interests in a global security:

The laws of some states require that certain purchasers of securities take physical delivery of securities in definitive form. These laws may impair the owner's ability to transfer beneficial interests in a global security.

Payments of principal of, and any premium and interest on, individual debt securities represented by a global security registered in the name of a depository or its nominee will be made to the depository or its nominee as the registered owner of the global security representing such debt securities. Neither we, the trustee, any paying agent nor the registrar for the debt securities will be responsible for any aspect of the records relating to or payments made by the depository or any participants on account of beneficial interests of the global security.

For a description of the depository arrangements for global securities held by The Depository Trust Company, see "Book-Entry Securities."

Discharge, Defeasance and Covenant Defeasance

We may discharge certain obligations to holders of any series of debt securities that have not already been delivered to the trustee for cancellation and that:

To discharge the obligations with respect to a series of debt securities, we must deposit with the trustee, in trust, an amount of funds in U.S. dollars or in the foreign currency in which those debt securities are payable. The deposited amount must be sufficient to pay the entire amount of principal of, and any premium, interest and additional amounts on, those debt securities to the date of the deposit if those debt securities have become due and payable or to the maturity or redemption date of the debt securities, as the case may be; provided, however, we have paid all other sums payable under the indenture with respect to the debt securities, and certain other conditions are met.

Unless we specify otherwise in the applicable prospectus supplement, we may elect:

In the case of defeasance we will still retain some obligations in respect of the debt securities, including our obligations:

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After a covenant defeasance, any omission to comply with the obligations or covenants that have been defeased shall not constitute a default or an event of default with respect to the debt securities.

To elect either defeasance or covenant defeasance we must deposit with the trustee, in trust, an amount, in U.S. dollars or in the foreign currency in which the relevant debt securities are payable at stated maturity, or in government obligations, as defined below, or both, applicable to such debt securities. The deposit will provide through the scheduled payment of principal and interest in accordance with their terms, money in an amount sufficient to pay the principal of and any premium and interest on (and, to the extent that (1) the debt securities of such series provide for the payment of additional amounts and (2) we may reasonably determine the amount of any such additional amounts at the time of deposit (in the exercise of our sole discretion), any such additional amounts with respect to) such debt securities, and any mandatory sinking fund or analogous payments thereon, on their scheduled due dates.

In addition, we can only elect defeasance or covenant defeasance if, among other things:

The indenture deems a foreign currency to be any currency, currency unit or composite currency including, without limitation, the euro, issued by the government of one or more countries other than the United States or by any recognized confederation or association of governments.

The indenture defines government obligations as securities that are not callable or redeemable at the option of the issuer or issuers and are:

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Government obligations also include a depositary receipt issued by a bank or trust company as custodian with respect to any government obligation described above or a specific payment of interest on or principal of or any other amount with respect to any government obligation held by that custodian for the account of the holder of such depositary receipt, as long as, except as required by law, that custodian is not authorized to make any deduction from the amount payable to the holder of the depositary receipt from any amount received by the custodian with respect to the government obligation or the specific payment of interest on or principal of or any other amount with respect to the government obligation evidenced by the depositary receipt.

Unless otherwise specified in the applicable prospectus supplement, if, after we have deposited funds and/or government obligations to effect defeasance or covenant defeasance with respect to debt securities of any series, either:

the indebtedness represented by that debt security shall be deemed to have been, and will be, fully discharged and satisfied through the payment of the principal of, and any premium and interest on, and additional amounts, if any, with respect to, that debt security as that debt security becomes due out of the proceeds yielded by converting the amount or other properties so deposited in respect of that debt security into the currency in which that debt security becomes payable as a result of the election or conversion event based on:

The indenture defines a "conversion event" as the cessation of use of:

Unless otherwise provided in the applicable prospectus supplement, all payments of principal of, and any premium and interest on, any debt security that are payable in a foreign currency that ceases to be used by the government or confederation of issuance shall be made in U.S. dollars.

If we effect a covenant defeasance with respect to any debt securities and the debt securities are declared due and payable because of the occurrence of any event of default other than an event of default with respect to which there has been covenant defeasance, the amount in the foreign currency in which the debt securities are payable, and government obligations on deposit with the trustee, will be sufficient to pay amounts due on the debt securities at the time of the stated maturity but may not be sufficient to pay amounts due on the debt securities at the time of the acceleration resulting from the event of default. However, we would remain liable for payment of the amounts due at the time of acceleration.

The applicable prospectus supplement may further describe the provisions, if any, permitting defeasance or covenant defeasance, including any modifications to the provisions described above, with respect to the debt securities of or within a particular series.

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Modification and Waiver

DTE Energy and the trustee may generally modify certain provisions of the indenture with the consent of the holders of not less than a majority in aggregate principal amount of the debt securities of each series affected by the modification, except that no such modification or amendment may, without the consent of the holder of each debt security affected thereby:

In addition, we and the trustee may, without the consent of any holders, modify provisions of the indenture for certain purposes, including, among other things:

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The holders of at least 66²/₃% in aggregate principal amount of debt securities of any series issued under the indenture may, on behalf of the holders of all debt securities of that series, waive our compliance with certain restrictive provisions of the indenture. The holders of not less than a majority in aggregate principal amount of debt securities of any series issued under the indenture may, on behalf of all holders of debt securities of that series, waive any past default and its consequences under the indenture with respect to the debt securities of that series, except:

Resignation and Removal of the Trustee; Deemed Resignation

The trustee may resign at any time with respect to the debt securities of one or more series by giving written notice thereof to us.

The trustee may also be removed with respect to the debt securities of any series by act of the holders of a majority in principal amount of the then outstanding debt securities of such series.

No resignation or removal of such trustee and no appointment of a successor trustee will become effective until the acceptance of appointment by a successor trustee in accordance with the requirements of the indenture.

Under certain circumstances, we may appoint a successor trustee and if the successor accepts, the retiring trustee will be deemed to have resigned.

Governing Law

The indenture is governed by, and will be construed in accordance with, the laws of the State of New York.

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Concerning the Trustee

The Bank of New York Mellon Trust Company, N.A., is the successor trustee under the indenture. In addition to acting as trustee under the indenture and in certain other capacities as described in this prospectus, the trustee and its affiliates may act as trustee under various other indentures, trusts and guarantees of DTE Energy and its affiliates and may act as a lender and provide other banking, trust and investment services for DTE Energy and its affiliates in the ordinary course of business.

The Trust Indenture Act contains limitations on the rights of the trustee, should it become a creditor of DTE Energy, to obtain payment of claims in certain cases or to realize on certain property received by it in respect of any such claims, as security or otherwise. The trustee is permitted to engage in other transactions with DTE Energy and its subsidiaries from time to time, provided that if the trustee acquires any conflicting interest it must eliminate such conflict upon the occurrence of an event of default under the indenture, or else resign.

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DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

We may issue stock purchase contracts, including contracts that obligate holders to purchase from us, and obligate us to sell to these holders, a specified number of shares of common stock or preferred stock at a future date or dates. The consideration per share of common stock or preferred stock may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula set forth in the stock purchase contracts. The stock purchase contracts may be issued separately or as a part of stock purchase units consisting of a stock purchase contract and either our debt securities or debt securities of third parties including, but not limited to, U.S. Treasury securities, that would secure the holders' obligations to purchase the common stock or preferred stock under the stock purchase contracts. The stock purchase contracts may require us to make periodic payments to the holders of some or all of the stock purchase units or vice versa, and such payments may be unsecured or prefunded on some basis. The stock purchase contracts may require holders to secure their obligations under these stock purchase contracts in a specified manner.

The applicable prospectus supplement or other offering materials will describe the terms of the stock purchase contracts or stock purchase units and will contain a discussion of the material federal income tax considerations applicable to the stock purchase contracts and stock purchase units. The description in the applicable prospectus supplement or other offering materials will not necessarily be complete, and reference will be made for additional information to the purchase contract agreement or unit purchase agreement, as applicable, that we will enter into at the time of issue, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units.

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BOOK-ENTRY SECURITIES

Unless we otherwise specify in the applicable prospectus supplement, the securities, other than our common stock, will be represented by one or more global securities. Each global security will be deposited with, or on behalf of, DTC and registered in the name of a nominee of DTC.

Portions of the following information concerning DTC and DTC's book-entry only system have been obtained from sources, including DTC, that we believe to be reliable. We make no representation as to the accuracy of such information.

DTC is a limited-purpose trust company organized under the New York Banking Law, a "banking organization" within the meaning of the New York Banking Law, a member of the Federal Reserve System, a "clearing corporation" within the meaning of the New York Uniform Commercial Code, and a "clearing agency" registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds and provides asset servicing for U.S. and non-U.S. equity issues, corporate and municipal debt issues and money market instruments that DTC's participants ("Direct Participants") deposit with DTC. DTC also facilitates the post-trade settlement among Direct Participants of sales and other securities transactions in deposited securities, through electronic computerized book-entry transfers and pledges between Direct Participants' accounts. This eliminates the need for physical movement of securities certificates. Direct Participants include both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, clearing corporations, and certain other organizations. DTC is a wholly owned subsidiary of The Depository Trust & Clearing Corporation ("DTCC"). DTCC is the holding company for DTC, National Securities Clearing Corporation and Fixed Income Clearing Corporation, all of which are registered clearing agencies. DTCC is owned by the users of its regulated subsidiaries. Access to the DTC system is also available to others such as both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, and clearing corporations that clear through or maintain a custodial relationship with a Direct Participant, either directly or indirectly ("Indirect Participants"). The DTC Rules applicable to its Participants are on file with the SEC.

Purchases of global securities under the DTC system must be made by or through Direct Participants, which will receive a credit for the global securities on DTC's records. The ownership interest of each actual purchaser of each security ("Beneficial Owner") is in turn to be recorded on the Direct and Indirect Participants' records. Beneficial Owners will not receive written confirmation from DTC of their purchase, but Beneficial Owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the Direct or Indirect Participant through which the Beneficial Owner entered into the transaction. Transfers of ownership interests in the securities are to be accomplished by entries made on the books of Direct and Indirect Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in the global securities except in the event that use of the book-entry system for the global securities is discontinued.

To facilitate subsequent transfers, all global securities deposited by Direct Participants with DTC will be registered in the name of DTC's partnership nominee, Cede & Co. or such other name as may be requested by an authorized representative of DTC. The deposit of global securities with DTC and their registration in the name of Cede & Co. or such other nominee will effect no change in beneficial ownership. DTC will have no knowledge of the actual Beneficial Owners of the global securities; DTC's records will reflect only the identity of the Direct Participants to whose accounts such securities are credited, which may or may not be the Beneficial Owners. The Direct and Indirect Participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to Direct Participants, by Direct Participants to Indirect Participants, and by Direct Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time. Beneficial Owners may wish to take certain steps to augment transmission to them of notices of

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significant events with respect to the global securities, such as redemptions, tenders, defaults and proposed amendments to the Indenture. Beneficial Owners may wish to ascertain that the nominee holding the global securities for their benefit has agreed to obtain and transmit notices to the Beneficial Owners. In the alternative, Beneficial Owners may wish to provide their names and addresses to the registrar and request that copies of notices be provided directly to them.

Any redemption notices will be sent to DTC. If less than all of a series of global securities are being redeemed, DTC's practice is to determine by lot the amount of the interest of each Direct Participant to be redeemed.

Neither DTC nor Cede & Co. (nor any other DTC nominee) will consent or vote with respect to securities unless authorized by a Direct Participant in accordance with DTC's procedures. Under its usual procedures, DTC mails an Omnibus Proxy to us as soon as possible after the record date. The Omnibus Proxy assigns Cede & Co.'s consenting or voting rights to those Direct Participants to whose accounts the securities are credited on the record date (identified in a listing attached to the Omnibus Proxy).

Principal and interest payments, distributions and dividend payments and redemption proceeds, if any, on the global securities will be made to Cede & Co. or such other nominee as may be requested by an authorized representative of DTC. DTC's practice is to credit Direct Participants' accounts upon DTC's receipt of funds and corresponding detail information from the trustee or agent on the payment date in accordance with their respective holdings shown on DTC's records. Payments by Direct and Indirect Participants to Beneficial Owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in "street-name," and will be the responsibility of such Participants and not of DTC, the trustee or agent for such securities or us, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of principal, premium, if any, interest, distributions and dividend payments and redemption proceeds, if any, to Cede & Co. (or such other nominee as may be requested by an authorized representative of DTC) is the responsibility of the appropriate trustee or agent and us, disbursement of such payments to Direct Participants is the responsibility of DTC, and disbursement of such payments to the Beneficial Owners is the responsibility of Direct and Indirect Participants.

DTC may discontinue providing its services as securities depository with respect to the securities at any time by giving reasonable notice to us or the trustee. Under such circumstances, in the event that a successor securities depository is not obtained, certificates representing the securities are required to be printed and delivered.

We may decide to discontinue use of the system of book-entry-only transfers through DTC (or a successor securities depository), subject to the procedures of DTC. In that event, certificates representing the securities will be printed and delivered to DTC.

The underwriters, dealers or agents of any of the securities may be direct participants of DTC.

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PLAN OF DISTRIBUTION

DTE Energy may sell the securities through agents, underwriters or dealers, or directly to one or more purchasers without using underwriters or agents.

DTE Energy may designate one or more agents to sell the securities. Unless otherwise stated in a prospectus supplement, the agents will agree to use their reasonable efforts to solicit purchases for the period of their appointment or to sell securities on a continuing basis.

If DTE Energy uses underwriters for a sale of securities, the underwriters will acquire the securities for their own account. The underwriters may resell the securities in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. The underwriters may sell the securities directly or through underwriting syndicates represented by managing underwriters. Unless otherwise stated in a prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to the conditions set forth in the applicable underwriting agreement. The underwriters will be obligated to purchase all the securities offered if any of those securities are purchased. If DTE Energy uses a dealer in the sale, it will sell the securities to the dealer as principal. The dealer may then resell those securities at varying prices determined at the time of resale. Any initial public offering price and any discounts or concessions allowed or re-allowed or paid to dealers will be described in the applicable prospectus supplement and may be changed from time to time.

Underwriters, dealers and agents that participate in the distribution of the securities may be underwriters as defined in the Securities Act and any discounts or commissions they receive from DTE Energy and any profit on their resale of the securities may be treated as underwriting discounts and commissions under the Securities Act. The applicable prospectus supplement will identify any underwriters, dealers or agents and will describe their compensation. DTE Energy may have agreements with the underwriters, dealers and agents to indemnify them against certain civil liabilities, including liabilities under the Securities Act. Underwriters, dealers and agents may engage in transactions with or perform services for us or our subsidiaries in the ordinary course of their businesses.

Trading Markets and Listing of Securities

Unless otherwise specified in the applicable prospectus supplement, each class or series of securities will be a new issue with no established trading market, other than the common stock, which is listed on the New York Stock Exchange. DTE Energy may elect to list any other class or series of securities on any exchange but is not obligated to do so. It is possible that one or more underwriters may make a market in a class or series of securities, but the underwriters will not be obligated to do so and may discontinue any market making at any time without notice. DTE Energy cannot give any assurance as to the liquidity of the trading market for any of the securities.

Stabilization Activities

Any underwriter may engage in over-allotment, stabilizing transactions, syndicate-covering transactions and penalty bids under the Exchange Act. Over-allotment involves sales in excess of the offering size, which create a syndicate short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum. Syndicate-covering transactions involve purchases of the securities in the open market after the distribution is completed to cover syndicate short positions. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the securities originally sold by the syndicate member are purchased in a syndicate-covering transaction to cover syndicate short positions. These stabilizing activities may cause the price of the securities to be higher than it would otherwise be. If commenced, the underwriters may discontinue any of the activities at any time.

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LEGAL MATTERS

The validity of the securities and certain other legal matters will be passed upon for DTE Energy by JoAnn Chávez, Senior Vice President and Chief Legal Officer. Ms. Chávez beneficially owns shares of DTE Energy common stock. Except as otherwise set forth in a prospectus supplement, certain legal matters relating to the securities will be passed upon for any underwriters, dealers or agents by Bracewell LLP, Houston, Texas.

Bracewell LLP has represented, and may in the future continue to represent, us and certain of our affiliates in connection with matters unrelated to the offering of securities described in this prospectus.

EXPERTS

The financial statements and management's assessment of the effectiveness of internal control over financial reporting (which is included in Management's Report on Internal Control over Financial Reporting) incorporated in this prospectus by reference to the Annual Report on Form 10-K of DTE Energy Company for the year ended December 31, 2024 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND MORE INFORMATION

Available Information

We file annual, quarterly and special reports, and other information with the Securities and Exchange Commission. Our SEC filings are available to the public over the Internet at the SEC's web site at http://www.sec.gov.

We maintain a web site at http://www.dteenergy.com, that contains information about us. The information on our web site is not incorporated by reference into this prospectus and you should not consider it part of this prospectus.

Incorporation by Reference

The SEC allows us to "incorporate by reference" the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (other than information in such documents that is deemed not to be filed):

Each of these documents is available from the SEC's web site described above. We will provide without charge to each person, including any beneficial owner, to whom a copy of this prospectus is delivered, on the written or oral request of that person, a copy of any or all of the documents incorporated in this prospectus or in any related prospectus supplement by reference, excluding the exhibits to those documents unless the exhibits are

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specifically incorporated by reference therein. You may make such a request by writing or telephoning DTE Energy Investor Relations at:

DTE Energy Company

Attention: Investor Relations, 1150 WCB

One Energy Plaza

Detroit, Michigan 48226-1221

(313) 235-8030

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