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Duke Energy CORP
Duke Energy is a large regulated electric and gas utility headquartered in Charlotte, North Carolina, incorporated in 2005 and subject to oversight by the Federal Energy Regulatory Commission (FERC) along with state regulatory bodies. The company operates across multiple U.S. states primarily through subsidiaries including Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio, Duke Energy Indiana, and Piedmont Natural Gas. It is one of the largest electric power holding companies in the United States, serving millions of customers across the Carolinas, Florida, Ohio, Indiana, and Kentucky. Operations span electricity generation, transmission, and distribution, as well as natural gas distribution through its Piedmont subsidiary.