Duke Energy is an energy company serving more than 700 million customers. The company is present in North Carolina, South Carolina, Ohio, Kentucky, Florida and some Midwest states. For more than 150 years, Duke Energy has been providing energy to customers. Duke Energy's Unit to Reduce Natural Gas Rates in Tennessee Duke Energy's (DUK) subsidiary, Piedmont Natural Gas, receives approval from the TPUC to decrease natural gas rates for all customers in its territory, effective immediately. Duke Energy also described environmental, social and governance, or ESG, investments and practices as an "essential component" of its strategy. "Duke has been a leader in interaction, discussion and engagement with ESG investors for some time," Good said.