Company: DTK
Filing Date: 2025-09-09
Form Type: 424B5
Source: 0001193125-25-198859
Chunk: 33

Company: DTE ENERGY CO
Filing Date: 2025-09-09
Form: 424B5
Chunk 33
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 be the third business day (T+3) following the date of this prospectus supplement. Under Rule 15c6-1under the Exchange Act, trades in the secondary market generally are required to settle within one business day (T+1), unless the parties to any such trade expressly agree otherwise. Accordingly, the purchasers who wish to trade the notes on any date prior to one business day before delivery will be required to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of the notes who wish to trade the notes on any date prior to one business day before delivery 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. It is possible that one or more of the underwriters or their affiliates could S-24

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 notes 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 notes or possession or distribution of
this prospectus or any other offering or publicity material relating to the notes in any country or jurisdiction (other than the United States) where any such action for that purpose is required.

Canada

The notes
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