Billionaires thanks to her stake in investment company Ferd that FORBES values at $1.2 billion. Fresh out of high school, Alexandra is one of the most promising horseback riders in Norway, collecting trophies from competitions across Europe.
Equally wealthy is her sister, 20 year old Katharina, who is enrolled at Amsterdam University College where she is a freshman studying social science.
The sisters each own 42.2 percent of the private company and have for a while. Ferd is a holding company with diverse interests spanning private equity holdings, real estate, security investments and a hedge fund.