Amancio Ortega, from Spain - net worth: $57 billion - is 2013s biggest gainer; his fortune is up $19.5 billion, pushing his fortune to a record high and moving him ahead of Warren Buffett. While he&#x27;s no longer chairman of clothing retailer Inditex (he stepped down in 2011), he controls nearly 60% of the company&#x27;s shares, which were up more than 50%.  The company, which operates under several brand names including Zara, Massimo Dutti and Stradivarius, has nearly 5,900 stores in 86 countries.