9. Rahel Blocher
Net Worth: $3.5 billion
Source of Wealth: Chemicals
Rahel Blocher, along with her sister Magdalena, is the largest shareholder of Ems-Chemie, the gigantic Swiss polymer and chemical manufacturer. The company generates $1.9 billion and has a market valuation of more than $9.4 billion. Rahel, the youngest sibling, holds shares equally with Magdalene but isn’t actively involved in company operations. Instead, she heads her father’s investment company, Robinvest.
8. Dona Bertarelli
Net Worth: $4.6 billion
Source of Wealth: Biotechnology
Dona Bertarelli is a Swiss businesswoman of Italian origin. She is co-president of the Bertarelli Foundation. She is also a sailo and won the 2010 Bol d’Or Mirabaud and the Rolex Fastnet in 2013. Bertarelli was active in the family business, and from 1992 to 1997 she was Executive Director, Public and Professional Affairs, and established the Serono Foundation. She also took over the family’s Five Star Grand Hotel Park in Gstaad in 2003.