Aliko Dangote, Africa’s richest man, founded and chairs Dangote Cement, the continent’s largest cement producer. In 2015 Dangote Cement launched new plants in Cameroon, Ethiopia, Zambia and Tanzania. This Nigerian bad ass is worth an estimated $16.3 billion. The company produces more than 30 million metric tons annually, and plans to double capacity by 2018. Dangote owns about 90% of publicly-traded Dangote Cement through a holding company; this percentage exceeds the 80% ownership ceiling set by the Nigerian Stock Exchange.