Fourth Quarter 2023 Earnings Review and Business Update

Simplified financing structure Cinergy Corp. (HoldCo) Duke Energy (HoldCo) Progress Energy (HoldCo)(1) Duke Energy Carolinas Duke Energy Ohio Duke Energy Indiana Holdco(2) Duke Energy Progress Duke Energy Florida Piedmont Natural Gas Duke Energy Kentucky Duke Energy Indiana (1) Progress Energy HoldCo has long-term debt outstanding, but no future common equity issuance is planned at this financing entity (2) 19.9% of Duke Energy Indiana Holdco membership interest owned by GIC DUKE ENERGY. FOURTH QUARTER 2023 EARNINGS REVIEW AND BUSINESS UPDATE Commercial Paper and LT Financings Money Pool and LT Financings // 37

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