Duke Energy Corporation announced on September 24, 2026, the appointment of Joyce Mullen to its Board of Directors, effective September 28, 2026. She will serve an initial term expiring at the 2027 Annual Meeting of Shareholders and has been appointed to the Audit Committee and the Operations and Nuclear Oversight Committee. Ms. Mullen brings extensive executive experience from her recent tenure as president and chief executive officer of Insight Enterprises Inc., where she led the company's strategy to become a leading AI-first solutions integrator. Prior to that role, she held significant leadership positions at Dell Technologies and Cummins Engine Company, managing sales, operations, supply chain, and partner strategy. The Board has confirmed that Ms. Mullen is independent in accordance with Duke Energy's standards for director independence, NYSE listing standards, and SEC regulations. She holds an MBA from Harvard Business School and a bachelor's degree in international relations from Brown University, adding to the board's diverse expertise.