“What we’re about is the belief that access to affordable and real-time health information is a basic human right, and it’s a civil right.”
Net worth: $4.5 billion. Age: 30.
Route to Riches: Chemical engineering sophomore drops out of Stanford to work on better, cheaper, faster blood tests. Labors in secrecy for a decade. Surfaces with big partnerships, including drugstore chain Walgreens. Her company, Theranos, was valued at $9 billion in latest venture capital fundraising round; she owns 50%. Needlephobe: Afraid of needles, Holmes’ technology can do many blood tests with one tiny finger prick. Rich List Records: Youngest woman on Forbes 400; Youngest woman self-made billionaire. Board Bigwigs: Henry Kissinger, Sam Nunn, Bill Frist, George Schultz.