Pacific Gas and Electric Company, a publicly owned company headquartered in San Francisco, US, was incorporated in California in 1905 and operates with approximately 23,110 employees. Functioning as one of the largest combination natural gas and electric utilities in the United States, the company's primary business involves the transmission and delivery of energy. It provides natural gas and electric service to approximately 15 million people throughout a 70,000-square-mile service area in northern and central California. The company is a subsidiary of PG&E Corporation.