DTE Energy President and COO Mark Stiers to retire effective Jan 12, 2026

DTE ENERGY CO

Mark W. Stiers, President & COO of DTE Vantage and Energy Trading, notified retirement on Dec 2, 2025.
Stiers will step down from role on Jan 12, 2026, then serve as advisor until March 31, 2026.
Board amended Bylaws to set requirements for shareholder meeting matters and remote communication.
Bylaw changes are procedural; no immediate financial impact expected.

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