Isabel dos Santos is a businesswoman from Angola who has an estimated net worth of $3.5 billion as of May 2015 according to Forbes. She debuted on the Forbes Billionaires list as the 736th richest person and is ranked 31st in Africa’s 40 Richest List. She is also the richest person and the first billionaire in Angola.

Born in Baku, Azerbaijan in 1973, Isabel is the oldest daughter of the President of Angola, Jose Eduardo dos Santos. She began her business in 1977, at the age of 24. It was a restaurant called Miami Beach located in Luanda, the capital of Angola. Since then, she has come a long way in business.

Currently, Isabel dos Santos sits on the board of many Angolan and Portuguese companies. She is one of the key people in making business decisions. According to her representatives, her fortune is self-made and does not involve anything of her father. However, a recent research shows that President dos Santos has transferred his shares in several holding companies of his daughter.

Mrs. dos Santos’ most valuable asset is a 25% stake (worth a conservative $1 billion) in Unitel, one of the two mobile phone networks in Angola. She also serves as a board member in the company. She sits on the board of Banco BIC in Angola where she also has a 25% share. She is the biggest shareholder, with nearly 15%, in ZON Multimedia, a Portuguese media conglomerate and a listed cable TV company. She also owns almost 20% of Banco BPI, one of the largest publicly traded banks in Portugal.