Johann Rupert & family

Johann Rupert is chairman of Swiss luxury goods firm Compagnie Financiere Richemont.

The company is best known for the brands Cartier and Montblanc.

It was formed in 1998 through a spinoff of assets owned by Rembrandt Group Limited (now Remgro Limited), which his father Anton formed in the 1940s.

He owns 7% of diversified investment firm Remgro, which he chairs, as well as 26% of Reinet, an investment holding company based in Luxembourg.

Rupert has been a vocal opponent of plans to allow fracking in the Karoo, a region of South Africa where he owns land.

Rupert was an investor in the Saracens English rugby team and Anthonij Rupert Wines, named after his deceased brother.

Rupert says his biggest regret was not buying half of Gucci when he had the opportunity to do so for just $175 million.