Chilean power distribution and trading company Chilquinta Energía S.A. is a unit of US firm Sempra Energy. The company's concession area covers 11,496km2, spanning the provinces of San Antonio, Petorca, Valparaíso, San Felipe, Quillota, and Los Andes, with more than 560,000 clients (92.1% residential). In addition, Chilquinta, through its subsidiaries, distributes electricity to more than 107,000 customers in the Maule (VII) and Biobío (VIII) regions. In 2015, power sales totaled more than 2,540GWh. The company was incorporated in 1995 and is based in Valparaíso.