7. Margarita Louis-Dreyfus ($8.6 billion)
Margarita Louis-Dreyfus is the chairman of Louis Dreyfus Company. It is the giant commodities company in France.
Her late husband, Robert Louis-Dreyfus, was the chairman of the company. When he passed away in 2009, she took over as she carries on with her baby twins.
Margarita does not just sit and wait for the money to grow. She made big changes to the company. The 54-years-old widow is also the owner of Olympique Marseille, a French football club.
She is now living in Davos, Switzerland. She owns a total of $8.6 billion net worth. This put her as the 171th billionaire in the world and the 3rd in Switzerland.
