Duke Energy

The firm's returns are determined by rates of return authorized by state public utility commissions for its six regulated subsidiaries. These are applied to a rate base composed of capital invested in generation, transmission, and distribution assets. Because fuel costs are typically pass-through items, the model generates relatively stable returns that correlate more with infrastructure deployment pace than energy commodity prices.

No. The Duke family's original industrial capital provided the founding equity for Duke Power, but the modern entity is a publicly traded corporation (NYSE: DUK) with diversified institutional and retail ownership. The Duke Endowment, a separate charitable foundation, holds a minority stake and operates independently, focusing on health care, education, and child welfare in the Carolinas.

The commercial renewables segment develops, owns, and operates utility-scale wind and solar projects that sell power under long-term contracts to municipalities, electric cooperatives, and corporate buyers. This unregulated arm operates at market-based returns and adds a growth vector outside the rate base model, though it represents a smaller share of consolidated earnings compared to the regulated utilities.

The regulated footprint spans the Carolinas, Florida, Ohio, Kentucky, and Indiana, covering approximately 95,000 square miles of service territory. The Carolinas represent the largest concentration of customers and rate base investment, with Florida and the Midwest serving as secondary regulated clusters.

Capital deployment is concentrated in long-lived physical infrastructure — transmission lines, distribution networks, natural gas pipelines, and generation plants — with investment cycles spanning decades. The regulated subsidiaries file integrated resource plans with state commissions that outline 15- to 20-year capital expenditure needs, prioritizing grid hardening, storm resilience, and coal-to-gas and coal-to-renewables transition projects.