Indra Nooyi

Age: 55

Occupation: Chairman & CEO of PepsiCo

Nationality: Indian

Indra Nooyi is an active entrepreneur and has her name in the books of history for being one of the most efficient and prominent women in business. She became the CEO of PepsiCo in 2007 and since then she has been no stranger to long working hours. According to CNN Money, Nooyi sleeps for just mere four hours a night.

Kelly Ripa

Age: 41

Occupation: American actress, talk show host, and television producer

Ripa is known to be a night owl and early bird, she is popular for her talk show and she also takes care of her family with three children. Ripa owns a production company along with her husband Mark Consuelos. According to an interview, Ripa falls asleep at 1 am midnight and wakes up at 6.15 for her regular chores of work.

Sergio Marchionne

Age: 60

Occupation: CEO of Fiat S.p.A. and Fiat Group Automobiles S.p.A

Sergio Marchionne is considered to be one of the most renowned executives in the automotive world. He has played a key role in the development of Fiat and has a punishing schedule throughout. According to Alex Taylor from Fortune, “Marchionne works on four hours of sleep a night, fueled by coffee and cigarettes.”