Overview
Sempra is a U.S. energy infrastructure holding company focused on regulated electric and natural gas utilities. Its California businesses include San Diego Gas & Electric and Southern California Gas; in Texas, it holds an interest in Oncor, an electric transmission and distribution utility. Sempra also has energy infrastructure investments in the United States and Mexico, including liquefied natural gas projects.[1][2][3]
Sempra describes its mission as “building America’s leading utility growth business.” Its businesses serve nearly 40 million consumers. In 2025, Sempra reported $13.7 billion in revenue and 15,938 employees.[4][5][6] [1][2][3][7][8][4][5][6]
Products & services
Sempra’s California utilities provide electricity and natural gas services. San Diego Gas & Electric (SDG&E) delivers electricity and natural gas in Southern California; its electric system included 2,021 miles of transmission lines, 24,149 miles of distribution lines and 159 substations at year-end 2024. Southern California Gas (SoCalGas) procures and delivers gas for core customers and provides gas transportation, storage and load-balancing services. Its four storage facilities had 137 billion cubic feet of combined working-gas capacity at year-end 2024.[9][10][11][12] [9][10][11][12][13][14][15][16][17][18][19][20][21]
Geographic presence
Sempra is headquartered in San Diego, California. Its California utilities serve distinct parts of the state: San Diego Gas & Electric’s approximately 4,100-square-mile service territory covers San Diego County and part of Orange County, while Southern California Gas serves an approximately 24,000-square-mile area across Southern California and parts of central California. SoCalGas’s territory excludes San Diego County, Long Beach and a desert area of San Bernardino County.[22][23][24]
In Texas, Sempra’s Oncor investment has transmission and distribution assets in more than 120 counties and 400 municipalities; its Sharyland investment includes south Texas transmission assets and a connection to Mexico. Sempra Infrastructure has assets in both the United States and Mexico. Its LNG facilities and projects include sites in Hackberry, Louisiana; near Port Arthur, Texas; and Baja California, Mexico. Its Mexican operations also include natural-gas distribution zones in Mexicali, Chihuahua and La Laguna-Durango, as well as refined-products storage in several states. The reported revenue breakdown is by business segment rather than by country or state.[25][26][27][28][29][30][31][32] [22][23][24][25][26][27][28][29][30][31][32]
Business segments
Sempra reports three business segments: Sempra California, Sempra Texas Utilities and Sempra Infrastructure. Sempra California comprises its regulated utilities SDG&E, which provides electricity and natural gas service, and SoCalGas, which provides natural gas service. Together they serve customers across much of Southern California.[33][34][23][24]
Sempra Texas Utilities holds equity-method interests in Oncor Holdings and Sharyland Holdings. Their underlying utilities primarily transmit and distribute electricity in Texas; Oncor also operates an extensive distribution network. Sempra Infrastructure develops, operates and invests in energy infrastructure, principally LNG facilities, natural gas networks and lower-carbon energy projects in the U.S. and Mexico.[35][36][25][2][37]
Measured by reported segment assets at year-end 2025, the approximate mix was **54% California, 16% Texas Utilities and 30% Infrastructure**. On a different measure, their shares of total *segment earnings before parent-level items* were approximately **52%, 22% and 26%**, respectively, in 2024. Texas Utilities’ equity-method accounting means its contribution is more meaningfully reflected in earnings and assets than in consolidated segment revenue.[38][39][35] [33][34][23][24][35][36][25][2][37][38][38][38][39][39][39]
Company history
Sempra Energy was formed in 1998 through the merger of Pacific Enterprises, parent of Southern California Gas, and Enova Corporation, parent of San Diego Gas & Electric. The combination brought the two Southern California utilities under one holding company.[40] Sempra subsequently expanded beyond those utilities into energy trading and infrastructure. In 2010, it agreed to acquire natural-gas pipeline and infrastructure assets in Mexico, and in 2013 its Mexican subsidiary, IEnova, launched an initial public offering.[41][42]
In 2018, Sempra acquired a majority stake in Oncor, a Texas electric transmission and distribution utility, substantially expanding its U.S. regulated-utility holdings.[43] It sold its utility businesses in Peru and Chile in 2020, then brought its LNG and Mexican energy businesses together under the Sempra Infrastructure platform in 2021.[44][45][46] [40][41][42][43][44][45][46]
Sources
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