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 27,859 full-time employees. The company went IPO on 2012-07-03. The firm operates through two segments: Electric Utilities and Infrastructure (EU&I) and Gas Utilities and Infrastructure (GU&I). The 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 customers within the Southeast and Midwest regions of the United States. The GU&I 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 service from interstate pipelines.