---
schema_version: "secwatch.filing_event.v1"
accession: "0000936340-25-000195"
form_type: "8-K"
ticker: "DTE"
cik: "0000936340"
company_name: "DTE ENERGY CO"
filed_at: "2025-09-05T23:59:59+00:00"
generated_at: "2026-05-17T08:11:27.794777+00:00"
event_type: "litigation"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# DTE subsidiary EES Coke loses partial summary judgment on Clean Air Act violations; trial on remedies set for Sept 15

## Summary
- U.S. District Court granted EPA partial summary judgment on liability on August 25, 2025; EES Coke plans to appeal to Sixth Circuit.
- Trial on remedies begins September 15, 2025; EPA brief requests penalties; outcome and financial impact unknown.
- Parent entities including DTE Energy added as defendants in May 2024, but no additional claims alleged.
- EES Coke had argued its Michigan-issued permits complied with Clean Air Act; EPA alleged non-attainment new source review violations.

## SEC filing metadata
- accession: 0000936340-25-000195
- form_type: 8-K
- ticker: DTE
- cik: 0000936340
- company_name: DTE ENERGY CO
- filed_at: 2025-09-05T23:59:59+00:00
- event_type: litigation
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/936340/000093634025000195/0000936340-25-000195-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/936340/000093634025000195/dte-20250905.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000936340-25-000195
- JSON: https://secwatch.observer/filing/0000936340-25-000195.json
- Plain text: https://secwatch.observer/filing/0000936340-25-000195.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.