Sporting goods company Fila's 73-year-old Chairman Yoon Yoon-soo is estimated to be worth about $830 million through his stake in Fila Korea, which acquired the global Fila brand in 2007. Fila Korea shares surged 400% from the start of last year through Friday, valuing the company at $4.3 billion. Yoon and his family own about 20% of the company.