Sempra Energy, together with its subsidiaries, invests in, develops, and operates energy infrastructure, as well as provides electric and gas services in the United States and internationally. The company’s San Diego Gas & Electric Company segment generates, transmits, and distributes electricity; and supplies natural gas. It provides electric services to a population of approximately 3.7 million and natural gas services to approximately 3.4 million of that population, covering a 4,100 square mile service territory in Southern California. Its Southern California Gas Company segment owns and operates a natural gas distribution, transmission, and storage system that supplies natural gas to a population of approximately 21.9 million, covering a 24,000 square mile service territory that encompasses Southern California and portions of central California. The company’s Sempra Texas Utility segment is involved in the regulated transmission and distribution of electricity serving approximately 3.6 million homes and businesses, and operating approximately 137,000 miles of transmission and distribution lines.

As of December 31, 2018, its transmission system included 16,000 circuit miles of transmission lines, 306 transmission stations, and 740 distribution substations; and distribution system consisted of 121,000 miles of overhead conductors and underground conductors. Sempra Energy’s Sempra Mexico segment develops, owns and operates, or holds interests in natural gas, electric, LNG, LPG, ethane, and liquid fuels infrastructure; and engages in the purchase of LNG, and purchase and sale of natural gas.

This segment operates a natural-gas-fired combined-cycle plant and two wind power generation facilities. Its assets/facilities consisted of 1,353 miles of natural gas transmission pipelines, 12 compressor stations, 139 miles of ethane pipelines, 118 miles of LPG pipelines, and 1 LPG storage terminal. The company was founded in 1998 and is headquartered in San Diego, California.