Company: DTK
Filing Date: 2025-04-04
Form Type: S-3ASR
Source: 0001193125-25-073369
Chunk: 52

Company: DTE ENERGY CO
Filing Date: 2025-04-04
Form: S-3ASR
Chunk 52
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 securities, and franchises to the mortgage trustee; |

| • |     | providing a sinking, amortization, improvement or other analogous fund for the purchase, redemption or other 
 retirement of any bonds; or                                                                                  |

| • |     | curing any ambiguities, or curing, correcting or supplementing any defect or inconsistent provision contained in 
 the mortgage as supplemented.                                                                                    |

The mortgage also provides that any supplemental indenture shall, insofar as may be required by the provisions of the Trust Indenture Act of 1939 as then in effect, comply with the provisions of that Act. (Article XVI) Events of Default and Remedies The following events of default are applicable to the mortgage bonds:

| • |     | failure to pay interest when due on the mortgage bonds, continued for 90 days; |

| • |     | failure to pay principal of, or premium, if any on the mortgage bonds when due; |

| • |     | failure to pay interest on outstanding underlying or prior lien bonds when due, continued for 90 days; |

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| • |     | failure to pay principal of (or premium on) outstanding underlying or prior lien bonds when due; |

| • |     | failure to perform or observe covenants, agreements or conditions contained in the mortgage, continued for 
 90 days after notice of default as provided in the mortgage; and                                           |

| • |     | insolvency or adjudication of bankruptcy or appointment of a receiver not removed or discharged within 
 90 days. (Article VI, Section 2)                                                                       |

If an event of default under the mortgage occurs and is continuing, the mortgage trustee may, and the holders of at least 25% in principal amount of outstanding mortgage bonds may, and upon the request of the holders of at least a majority in principal amount of outstanding mortgage bonds the mortgage trustee will, by notice as provided in the mortgage, declare the principal of all outstanding mortgage bonds, together with accrued interest thereon, to be immediately due and payable. If, at any time after any such declaration of acceleration, and before any sale of the trust estate has been made, all arrears of interest have been paid and all other defaults, if any, have been remedied or secured, then the holders of a majority in principal amount of outstanding mortgage bonds may, by notice as provided in the mortgage, waive such default and its consequences and rescind such declaration, but no such waiver will extend to any subsequent default. (Article VI, Section 2)