United States, April 1 -- Duke Energy announced it has completed the sale of its Tennessee Piedmont Natural Gas business to Spire - one of the largest publicly traded natural gas companies in the country - for $2.48 billion. The agreement was previously announced on July 29, 2025.Approximately $800 million of the proceeds will be used to pay down debt at Piedmont Natural Gas to maintain its capital structure. The remaining $1.5 billion proceeds, net of tax, will help efficiently fund the industry's largest regulated capital plan - $103 billion of investments over the next five years - to support a growing system and serve increasing load while keeping customer costs as low as possible. The sale agreement for the Piedmont Natural Gas Tenness...