Net Worth details: Ernesto Bertarelli made most of his fortune from the 65 percent stake he holds in Serono. That company was sold to Merck for $8.6 billion in 2006 and Bertarelli has diversified his holdings. He is the 50 percent owner of Serono’s Geneva headquarters. Since 2000 Bertarelli’s family has earned more than $1 billion by selling almost two million shares of Serono in its IPO. He is credit with the family’s shares which includes his mother and sister.
