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5. Elizabeth Holmes

 Elizabeth_Holmes_2014_(cropped)

Elizabeth Holmes is the founder and CEO of Theranos, a privately-owned medical-laboratory-services company that specializes in blood testing. Today, she is worth $4.5 billion dollars, making her the world’s youngest female self-made billionaire. 

Holmes’ current standing is an astronomical leap from her humble roots; she started her company when she was only 19, working out of a group college house basement. She used the money her parents had set aside for her education to kick-start what would later become Theranos. She dropped out of Stanford a semester later to tend to her work full-time.

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