Sunjutha Witchawut

Pi Securities Public Co. Ltd. provides brokerage and financial advisory services. It offers services to local and foreign individuals, corporate and financial institutions, funds and asset management companies. The firm also involves in the provision of retail equity services, institutional services, internet trading, global trading, investment banking services, and derivatives. The company was founded in 1966 and is headquartered in Bangkok, Thailand.

The International Engineering Public Co. Ltd. engages in the business of trading engineering products, installing and implementing information technology systems, producing and distributing electricity from solar energy, and waste disposal services. It operates under the Telecommunication and Implementation of Information Technology System; and Investment Business segments. The company was founded in 1922 and is headquartered in Bangkok, Thailand.

Part of Jard Karn Subzin Dee Co. Ltd., IEC Asset Co. Ltd. is a company based in Bangkok, Thailand. The Thai company provides various services such as information technology, energy, and solar power. The CEO of the company is Sunjutha Witchawut. IEC Asset Co. was acquired by Jard Karn Subzin Dee Co. Ltd. from The International Engineering Public Co. Ltd.

Part of The International Engineering Public Co. Ltd., IEC Green Energy Co. Ltd. provides research and development services on environmental management.

Part of Energy Choice Holding Co. Ltd., IEC Business Partners Co., Ltd. operates as an investment holding Thai company with interest in ethanol production. IEC Business Partners Co. was acquired by Energy Choice Holding Co. Ltd. from The International Engineering Public Co. Ltd. on January 18, 2012 for $0.01 million.

IEC Sakaeo 1 Co. Ltd. operates a biomass power plant. The company is headquartered in Thailand.