Company: DTK
Filing Date: 2025-03-13
Form Type: DEFA14A
Source: 0000936340-25-000084
Chunk: 0

Company: DTE ENERGY CO
Filing Date: 2025-03-13
Form: DEFA14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
<div align='center'>(Amendment No. )</div>

Filed by the Registrant ý Filed by a Party other than the Registrant ¨

Check the appropriate box:

| ¨ |     | Preliminary Proxy Statement                                                     |
| ¨ |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ¨ |     | Definitive Proxy Statement                                                      |
| ý |     | Definitive Additional Materials                                                 |
| ¨ |     | Soliciting Material Pursuant to §240.14a-12                                     |

#### DTE Energy Company
<div align='center'>(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check the appropriate box):

| ýNo fee required.                                                                                    |
| ¨Fee paid previously with preliminary materials.                                                     |
| ¨Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

| Shareowner Services     
 P.O. Box 64945          
 St. Paul, MN 55164-0945 |     |                                |
|                         |     | DTE ENERGY COMPANY             |
|                         |     | ANNUAL MEETING OF SHAREHOLDERS |
|                         |     | Thursday, May 8, 2025          |
|                         |     | 8:00 a.m. (EDT)                |
|                         |     | Virtual Only                   |

<div align='center'>Important Notice Regarding the Availability of Proxy Materials for the

DTE Energy Company Annual Meeting of Shareholders to be Held on May 8, 2025 (“Notice”)</div>

This Notice is hereby given that the Annual Meeting of Shareholders of DTE Energy Company will be held in virtual-only format on Thursday, May 8, 2025 at 8:00 a.m. (EDT).

This communication presents only an overview of the more complete proxy materials that are available to you on the Internet or by mail. We encourage you to access and review all of the important information