The $100-million increase in his net worth in June follows a $300-million decline in May.
The startup will begin its expansion within Kenya through Finclusion Group branches.
The Kenya Revenue Authority (KRA) said it is demanding full accountability from Karanja.
However, Rupert still remains South Africa's second-richest man.
Jay Z's assets include Roc Nation, stakes in Armand de Brignac and D'Usse cognac, and a fine art collection.
The listing will take place as soon as more favorable stock market conditions permit.
Dewji, Tanzania's richest man, is the CEO of MeTL Group, one of East Africa's largest business groups.
Ngebulana's Billion Group plans to build a mixed-use affordable housing complex in the East Coast Crossways area in Kwelerha.
Meet the 10 richest Black Americans in 2022.
Ketron is a wholly-owned subsidiary of Persianas Limited.
Rwandan President Paul Kagame participated in the groundbreaking ceremony of the project.