Elizabeth Holmes, (born February 3, 1984, Washington, D.C.), American entrepreneur who was founder and CEO (2003–18) of the medical diagnostic company Theranos Inc. In 2014 she was dubbed the world’s youngest self-made woman billionaire, but, by June 2016, estimates of her net worth had fallen dramatically in light of serious questions related to Theranos’s business practices and her 50 percent stake in the company. Holmes was forced to relinquish control of Theranos in 2018, and four years later she was convicted of defrauding investors. Holmes, the daughter of a U.S. government aid wo...