44. Anne Wojcicki
$440 Million Age: 44 Residence: stanford, california
Ex-wife of Google billionaire Sergey Brin, Anne cofounded 23andMe in 2006 but experienced serious setbacks seven years later, when the FDA banned her health-related DNA tests over concerns of accuracy. The Yale alum bounced back, winning approval for ten genetic risk tests—including ones for Alzheimer’s, Parkinson’s and celiac disease—in April 2017. A year later, 23andMe became the first-ever direct-to-consumer genetics company to receive FDA authorization for cancer-risk tests. The skyrocketing popularity of at-home kits has propelled 23andMe to a $1.75 billion valuation, making Wojcicki one of the wealthiest American biotech entrepreneurs. Her estimated fortune does not include any divorce settlement.