The youngest daughter of Ludwig Georg Braun, Johanna
Braun owns a 10% stake in her father's company B Braun
Melsungen. The German firm, which dates back to 1839, is a
major medical and pharmaceutical device company
operating in more than 50 countries.
Carl Erik Hagen, 29, net worth: $1.2 billion (£961bn)
Carl Erik Hagen, who is not known to be dating anyone at the
moment, owns a 30% stake in Canica, the parent company of
RMI, the Norwegian supermarket chain his father Stein Erik
Hagan founded in 1985. He also serves on the board of
Scandinavian e-commerce firm Komplett.
Saket Burman, 42, net worth: $1.3 billion (£999m)