Nassef Sawiris

Youngest son of Orascom founder and billionaire Onsi Sawiris. Took over leadership of empire's flagship construction and fertilizer division in 1998. In 2007, sold cement business in Algeria to French construction giant Lafarge. Owns 13.9% stake in Lafarge, and sits on board . Also largest shareholder in cement producer Texas Industries. Had berated management's poor performance, but recently reached agreement to boost stake to no more than 20%. Shares of Orascom on London exchange plunged by more than one-third after uprising in Egypt.