Jung-Jin Seo

CEO & co-founder

Seo, 57, lost his salaried job at Daewoo Motor in 1999, but bounced back three years later as an entrepreneur, setting up Korean drug-maker Celltrion. The pharmaceutical company is the country’s biggest maker of biosimilars, generic versions of biological products which replicate natural substances in the body such as antibodies.

Company:

Celltron

Net worth:

US$1.67 billion