The Electricity Generating Public Company Limited or EGCO is the first independent power producer in Thailand registered on May 12, 1992 by the Electricity Generating Authority of Thailand (EGAT). Such incorporation marked the commencement of the Thai government´s privatization initiatives to allow broader private sector investment in the power sector. On March 23, 1994, EGCO was transformed into a public company and then listed on the Stock Exchange of Thailand (SET) on January 16, 1995.

Since EGCO is a holding company, its main source of revenue is from the dividend income from subsidiaries and joint ventures which are located in both Thailand and the Asia Pacific region. EGCO Group companies either operate in the power sector with Power Purchase Agreement (PPA) or conduct energy and related business.