Source of Wealth:Online gaming (Nexon), Self-made
South Korean entrepreneur and founder of Nexon, Kim Jung-Ju has an estimated net worth of over $2.8 billion as of May 2015 according to Forbes. Kim Jung-Ju's Nexon is Korea's largest online gaming company that created popular games "Kart Rider" and "Maple Story." In 2010, he expanded by acquiring rivals Ndoors and Gamehi. Nexon has 350 million users all over the world in more than 72 countries; 64% of its revenues come from outside South Korea. His wife Yoo Jung-Hyun is also a major shareholder. Now the country's foremost online game producer, Nexon's annual revenues are set to top $900 million.