Duke Energy Corp. engages in the distribution of natural gas and energy-related services. The company is headquartered in Charlotte, North Carolina and currently employs 26,441 full-time employees. The company went IPO on 2012-07-03. The firm's segments include Electric Utilities and Infrastructure (EU&I) and Gas Utilities and Infrastructure (GU&I). EU&I segment conducts operations primarily through the regulated public utilities of Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida, Duke Energy Indiana and Duke Energy Ohio. EU&I provides retail electric service through the generation, transmission, distribution and sale of electricity to approximately 8.7 million customers within the Southeast and Midwest regions of the U.S. GU&I segment conducts natural gas operations primarily through the regulated public utilities of Piedmont, Duke Energy Ohio and Duke Energy Kentucky. GU&I serves residential, commercial, industrial and power generation natural gas customers, including customers served by municipalities who are wholesale customers. The company also purchases a diverse portfolio of transportation and storage services from interstate pipelines.