Juan Maria Riberas Mera

Juan María Riberas Mera and his billionaire brother, Francisco, rejoin the Forbes list following the April 2017 IPO of autoparts firm Gestamp.Their late father, Francisco Riberas Pampliega, founded a small steel trading company in 1958.Within 20 years, the company became one of Spain's largest steel companies and diversified into auto parts in 1997. Juan Maria, known as Jon, started at the company in a junior management position in 1992 after getting law and business degrees.The brothers also control steel producer Group Gonvarri and renewable energy firm Acek Energías Renovables.