Who she is: The youngest self-made female billionaire ever, the 31-year-old dropped out of Stanford during her undergraduate engineering studies at 19 to change the world.
What she does: Holmes is founder and CEO of her own health technology company, Theranos. The company's needle-free blood test system is well on its way to revolutionizing health care.
Why she's a badass: Holmes is basically a biotech superhero, and she's using her powers for good. Her painless blood sample invention is extremely accessible and affordable, which means that preventative testing for diseases is right around the corner. While she has encountered stumbling blocks in a male-dominated industry, Elizabeth works hard and won't stop until she's changed the world of health care.
