Gulf Energy Development Public Company Limited ("GULF") is one of Thailand's largest independent power producers and suppliers. As a holding company, GULF maintains equity stakes in subsidiary companies which primarily operate electricity, steam and chilled water generation facilities, as well as other related businesses. Its equity partners include both domestic firms and international corporate groups, such as J-Power, a leading power producer based in Japan, and Mitsui & Co, a leading Japanese trading firm with investment experience in utilities and power plant projects.

In addition, GULF holds shares in SPCG Public Company Limited, a major solar-farm operator and solar power supplier in Thailand, and EDL Generation Plc, the leading Laos-based power producer. It also supplies steam and chilled water from its SPP gas-fired power plants to industrial clients in several industrial estates, including WHA industrial estates and Hi-Tech Industrial Estate.

The total gross installed capacity of its gas-fired and solar rooftop projects in commercial operation amounts to 4,772.1MW with a net capacity of 1,963.5MW. In 2016, its market share in terms of contracted capacity stood at 7.2%,based on power purchase agreements (PPA) with the Electricity Generation Authority of Thailand (EGAT), which makes the copmpany a major player in Thailand.

By 2024, GULF's total installed capacity is expected to increase by 6,353.6MW, to 11,125.6MW. This means that it will become one of the top independent gas-fired power producers in ASEAN, and reflects the significant potential to enhance its production capacity and Thailand's energy security on a regional scale.