Business Secrets
That obsession with secrecy extended to every aspect of Theranos. For the first decade Holmes spent building her company, Theranos operated in stealth mode. She even took three former Theranos employees to court, claiming they had misused Theranos trade secrets.
Holmes' attitude toward secrecy was borrowed from a Silicon Valley hero of hers: Steve Jobs. Holmes started wearing black turtlenecks like Jobs, decorated her office with his favorite furniture, and like Jobs, never took vacations.
Even Holmes's uncharacteristically deep voice may have been part of a carefully crafted image intended to help her fit in in the male-dominated business world.