$4, puts his net worth at more than $65 billion, making him richer than Berkshire Hathaway's Warren Buffett and Amazon founder Jeff Bezos.
The 79-year old fashion tycoon also has a worth of $27 billion more than his closest European challenger, IKEA founder Ingvar Kamprad.
In October 2015, Ortega's net worth climbed to more than $80 billion when Zara's parent company Inditex's stock peaked, and he briefly became the world's richest man, surpassing Microsoft founder Bill Gates, $4
Inditex's stock fell soon afterwards, and after just four hours, Ortega went back to being the $4, a title he attained in June 2015, knocking Warren Buffett into third.
But despite his enormous net worth, many people have never heard of him.
Ortega is an incredibly private man, is rarely seen in public, and has given just a handful of interviews throughout his incredibly successful career in business.
That career started when Ortega founded fast-fashion giant Zara with his then-wife Rosalia in 1975. Today, his retail company Inditex SA - which owns Zara, Massimo Dutti, and Pull&Bear - has $4 outposts around the world. Zara in and of itself $4.
While Ortega is immensely private, we do know a fair amount about him, and Business Insider decided to put together everything we know about Ortega's life. Check it out below.