IESCO was based upon the Area Electricity Board of Islamabad and acquired the network and workings of the operating AEB. It was incorporated on April 25, 1998 vide company registration No. L09499 of 1997-98 under Section 32; certificate for commencement of business was obtained on June 1, 1998 under Section 146(2) of Companies Ordinance 1984. The main objective of the company was to acquire and take over the properties, rights and liabilities of WAPDA, comprising of administrative division formally known as the Islamabad Area Electricity Board (AEB) and to carry on, expand and extend its business and activities.

More information on IESCO is available on its website.