Elizabeth Holmes Theranos CEO

Billionaire Elizabeth Holmes, founder and chief executive officer of Theranos Inc., speaks during the 2015 Fortune Global Forum in San Francisco, California, U.S., on Monday, Nov. 2, 2015. The forum gathers Global 500 CEO's and innovators, builders, and technologists from some of the most dynamic, emerging companies all over the world to facilitate relationship building at the highest levels. Photographer: David Paul Morris/Bloomberg via Getty Images