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

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 and of itself is changing retail forever.