French luxury conglomerate Louis Vuitton Moët Hennessy (LVMH) has reached a market capitalisation of €400 billion ($AU623.93 billion) for the first time.

Bernard Arnault, CEO of LVMH Group

Delphine Arnault, chair and CEO of Dior

Alexandre Arnault, executive at Tiffany & Co.

Frederic Arnault is chief executive of TAG Heuer

Jean Arnault, marketing and product development for Louis Vuitton’s watches.

Antoine Arnault, vice-chairman and CEO of Christian Dior SE