Muschong Lisa A. 4

What Happened
Lisa A. Muschong, Vice President, Corporate Secretary & Chief of Staff at DTE Energy Co. (DTE), sold 1,000 shares of DTE common stock in an open-market sale on May 14, 2026. The shares were sold at $143.72 each, resulting in total proceeds of $143,721. This was a sale (not a purchase or option exercise) and does not by itself indicate the insider's view on the company.

Key Details

• Transaction date: May 14, 2026; Filing date (Form 4): May 15, 2026 (filed within the standard reporting window).
• Transaction type/code: Open-market Sale (S). Price: $143.72 per share. Total proceeds: $143,721.
• Shares owned after transaction: Not specified in the provided summary of the filing.
• Footnote: F1 — Includes shares of DTE common stock acquired under the DTE Energy Company Savings and Stock Ownership Plan per a plan statement dated May 14, 2026.
• No indications in the filing of a 10b5-1 plan, gift, option exercise, or tax-withholding related disposition.

Context
Sales by corporate officers are common and can reflect routine needs (diversification, personal liquidity, tax planning) rather than a signal about company fundamentals. Purchases generally carry more weight for investors seeking insider confidence; this single open-market sale should be viewed as one datapoint among broader insider activity and company performance.