Company: DTK
Filing Date: 2025-06-17
Form Type: 11-K
Source: 0000936340-25-000159
Chunk: 11

Company: DTE ENERGY CO
Filing Date: 2025-06-17
Form: 11-K
Chunk 11
---
 balances based on the fair value hierarchy defined as follows:

• Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Master Trust has the ability to access as of the reporting date.

• Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.

• Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.

#### NOTE 3 — FEDERAL INCOME TAX STATUS
The SSOP and the Gas ISOP each obtained a determination letter dated April 2, 2015. The Local 17 Plan and the Local 223 Plan each obtained a determination letter dated April 3, 2015. Each of the determination letters from the Internal Revenue Service (IRS) stated that the respective Plans, as then designed, were in compliance with the applicable requirements of the IRC. The Plans are qualified under Sections 401(a) and 401(k) of the IRC, and therefore, the related Master Trust is exempt from taxation. Accordingly, no provision for income taxes has been included in the accompanying financial statements. The Plans are no longer subject to federal income tax examinations by the IRS for years prior to 2021.

#### NOTE 4 — THE DTE ENERGY COMPANY MASTER PLAN TRUST
The Company established the Master Trust pursuant to a trust agreement with Empower Trust Company, LLC, as Trustee, in order to permit the commingling of trust assets of the Plans for investment and administrative purposes. The assets in the Master Trust are held in various participant-directed investments. Each of the Plans’ allocated portion of the investments is equal to the beginning of the year fair value of the Plans’ interest in the Master Trust, adjusted by the Plans' pro-rata share of the Master Trust expenses, plus actual contributions and investment income, less actual distributions, administrative expenses, and investments losses (if any). Investment income or loss is based on each participant’s elected investment options, and administrative expenses are allocated to the individual plans based upon their pro-rata share in the investments of the Master Trust.

At December 31, 2024 and 2023 each of the Plans' respective interests