Barcelona-based Roca Corporacion Empresarial has won the most distinguished family business of the year award, presented annually by private bank Lombard Odier Darier Hentsch and IMD, the Lausanne-based business school.

Roca, a bathroom product specialist, was started in 1917 by Matias, Mati, Josep and Angela Roca, and remains entirely owned by their descendants. It now employs 22,000 employees worldwide and boasts revenues of $2.6bn a year.