S urin Upatkoon, also known by his Chinese name Lau Kim Khoon, is a Thai-born Malaysian billionaire with a diversified portfolio of investments across Southeast Asia. His fortune is primarily derived from his large stake in the Magnum Corporation, which is one of Malaysia's largest licensed lottery and gaming companies. He has been a long-term investor in the company and has served on its board, making him a major figure in the country's gaming industry.

In addition to his gaming interests, Upatkoon has significant and valuable holdings in the telecommunications sector. He holds a substantial stake in the Thai telecom investment company, InTouch Holdings. This company was founded by the former Thai Prime Minister Thaksin Shinawatra, with whom Upatkoon has had a long and close business association. His ability to navigate the complex business and political landscapes of both Malaysia and Thailand has been key to his success as an investor.