A mysterious retail guru most people have never heard of just became richer than Warren Buffett

Zara's mysterious founder, Amancio Ortega, is now the world's second-richest man- surpassing even Warren Buffet. But despite his impressive net worth, many people have never heard of him.

The 79-year-old Spaniard fiercely guards his privacy and gives few interviews to the press.

Ortega founded fast-fashion giant Zara with his then-wife Rosalia in 1975. Today, his retail company Intidex SA - which owns Zara, as well as Massimo Dutti and Pull&Bear - has over 6,600 outposts around the world. Zara in of itself is changing retail forever.

According to Bloomberg, his net worth is a whopping $71.5 billion as of June 2, 2015. The only person left for him to beat in this financial sector? Bill Gates, who has a net worth of $85.5 billion. However, Bloomberg's data notes that since last year, Gates's net worth has decreased by $1.1 billion, while Ortega's has increased by an impressive $10.4 billion.