Exhibit 99.1 DTE Energy reports first quarter accomplishments, investments and earnings DETROIT, May 1, 2025 — DTE Energy (NYSE: DTE) today reported that it invested over $850 million into its utilities in the first quarter of 2025 and is on track to invest$4.4 billion this year to improve electric reliability, generate more renewable energy and ensure continued safe and reliable natural gas service for its customers. The company also reported first quarter earnings of $445 million or$2.14 per diluted sha ...