Oncor Electric Delivery Company is the largest transmission and distribution electric utility in the state of Texas and the 5th largest utility company in the US. Their service territory includes east, west, and north-central Texas, including Dallas, Fort Worth, Irving, Plano, Arlington, Beeville, Midland, Odessa, Killeen, Waco, Wichita Falls, Tyler, and other cities throughout Texas. In 2018, Sempra Energy acquired a majority stake in Oncor for US$9.45 billion.