Lakshmi Mittal is worth an estimated $18 billion as the CEO of ArcelorMittal, the largest steel company in the world. In 2005 he was the third-richest person in the world, and has also made Forbes’ list of most powerful people in the world. His wife Usha has been an important part of his success in the steel industry for more than a decade. In fact, she is so highly regarded at ArcelorMittal that at one point the company passed a resolution that would entrust her with management oversight, should the directors be absent.