Piedmont Natural Gas Co., Inc. (PNY), a wholly owned subsidiary of Duke Energy Corporation headquartered in Charlotte, North Carolina, provides regulated natural gas distribution services to over one million residential, commercial, industrial, and power generation customers across portions of North Carolina, South Carolina, and Tennessee; sells, installs, and repairs natural gas appliances and equipment including water heaters and grills; offers repair and financing plans; and maintains equity investments in regulated interstate natural gas transportation, storage, and intrastate transportation joint ventures. Founded in 1950, the company operates primarily through its regulated utility segment, which manages an extensive natural gas distribution system, alongside regulated and unregulated non-utility activities focused on energy-related partnerships, serving wholesale municipal customers and targeting high-growth Southeast markets with best-practice technologies for safe, reliable delivery. In July 2025, Duke Energy announced the agreement to divest Piedmont's Tennessee natural gas distribution business—serving over 200,000 customers in the Nashville metro area with nearly 3,800 miles of pipelines—to Spire Inc. for $2.48 billion in cash on a cash-free, debt-free basis, a transaction expected to close in the first quarter of 2026 pending Tennessee Public Utility Commission approval and other regulatory conditions, enabling Duke Energy to fund broader capital investments while Spire expands its utility footprint.