Steve Reinemund

Age: 64

Employer: PepsiCo.

Title: Former CEO

According to CNN Money, Reinemund sleeps only for five or six hours a night, he wakes up at 5 in the morning and is known to run for four miles. He also told the source that he sleeps at 11 in the night and does not need any alarm to wake up in the morning. He is currently the Dean of Business at Wake Forest University.

Herbert D. Kelleher

Age: 81

Occupation: Founder of Southwest Airlines

Herb Kelleher is the founder of Southwest Airlines and during the helm of his career he slept only for four hours a night. His hard work surely paid off, though he is retired from his services, Southwest Airlines remains to be one of the few continuously profitable airlines.

Julie Smolyansky

Company: Lifeway Foods

Company type: Health Food

It all started when Smolyansky took over the dairy company from her father in 2002 and this was when she was just 27 year old. It took her long time and effort to sustain the growth of the company and she managed to do this only by sleeping as little as possible during the night – in fact just for four hours many nights.