Company: Harry Winston
The CEO of luxury jewellers Harry Winston, is the daughter of Lebanese-born Nicolas George Hayek, the late co-founder of the Swatch Group.
In 1995, she joined its board before becoming its chairwoman in 2010. She became CEO of Harry Winston in 2013 a few months after Swatch Group acquired the company, which bought the world’s largest flawless blue diamond the Winston Blue in 2014 for $23.8m. Hayek also owns 60 Arabian horses.