The 82-year-old founder of BDMS, Thailand’s largest private healthcare group, started with just one hospital in 1969. Today, the group owns and manages more than 40 medical facilities in Thailand and Cambodia, known for their competitively priced services. Prasarttong-Osoth, who also owns Bangkok Airways, is setting up a digital TV channel. The entrepreneur was named Businessman of the Year 2014 by Thai newspaper The Nation.
Company:Bangkok Dusit Medical Services
Net worth:US$2.9 billion