#11:. Abdulsamad Rabiu, $1 billion Nigerian, Cement, Sugar
Rabiu founded BUA Group, a Nigerian conglomerate of shipping, manufacturing, oil and gas, sugar refineries, cement production, real estate, steel and port concessions. The group has annual revenues in excess of $2 billion.
Abdulsamad started out working for his father, Isyaku Rabiu, a successful businessman in Northern Nigeria before striking out on his own. In 1988, he started importing steel and iron, edible oils, sugar and rice.