Isabel dos Santos is the oldest daughter of Angola's longtime former president, Jose Eduardo dos Santos, who stepped down in fall 2017.

With an estimated net worth of $2.2 billion, Isabel dos Santos is the richest woman on the continent.

Her father made her head of Sonangol, Angola's state oil firm, in June 2016, but Angola's new president removed her from that role in November 2017.

Forbes research found that while Isabel's father was president, she ended up with stakes in Angolan companies including banks and a telecom firm.

Isabel accumulated her wealth in oil, diamonds, as well as in the communications and banking sectors. She boasts shareholdings in Portuguese banks and energy firms such as Banco Portugues de Investimento and Portuguese Energias de Portugal respectively. In Angola, she’s the chairwoman of Unitel SA, one of the country’s largest mobile network companies, valued at more than $5 billion.

While it’s unclear how the 42-year-old mogul got her start, she says she used her savings to open one of Luanda’s most expensive nightclubs, Miami Beach. From there, she started a trucking company to transport products for the club and other businesses.