The Business Insider reports that Zimbabwean billionaire Strive Masiyiwa has overtaken South African mining tycoon Patrice Motsepe as the richest black man in Southern Africa.

His net worth has increased from $2.7 to $4.4 billion.

Masiyiwa’s new title is thanks to the year-to-date price increase in the shares of his telecom company, Econet Wireless Zimbabwe, and his smart-tech company, Cassava Smartech.

He recently announced his retirement as chairman and director of Econet Wireless Zimbabwe Limited and still retains his more than 50% stake in the company he listed on the Zimbabwe Stock Exchange in 1998.