French businessman Martin and Olivier Bouygues have an estimated net worth of $3.6 billion as of April 2016 according to Forbes. The Bouygues siblings currently own over 21% of shares on the Bouygues Group. This diversified industrial conglomerate was founded by their father. Francis Bouygues in 1952. Currently, the group is listed at the Paris Stock Exchange. As of 2011, the company is operating in 80 countries worldwide, and hires more than 130,000 employees.

In addition to the Bouygues Group, the brothers also earned their wealth from their investments in media and telecom. Starting as a supervisor, Martin now serves as the chief executive officer and chairman of the group. He has been serving the position for 23 years now.

On the other hand, Olivier Bouygues as the CEO and deputy chief executive of SCDM, their own holding company. Among the company's construction projects include the English Channel Tunnel, motorways in Hungary, Sydney CityRail airport link, Hong Kong's Kwun Tong viaduct, University of Riyadh in Saudi Arabia, and Hassan II Mosque in Casablanca.