South African billionaire Johann Rupert has overtaken Nigerian industrialist Aliko Dangote as Africa’s richest person, according to data from the Bloomberg Billionaires Index, published on Wednesday, August 28.

Rupert controls Richemont, one of the world's largest luxury goods firms, which owns brands like Cartier and Montblanc, BBC reported.

His net worth has surged by $1.9 billion to $14.3 billion, placing him at 147th position globally, 12 places ahead of Dangote.

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The Nigerian's fortune has fallen by $1.7 billion this year, giving him a net worth of $13.4 billion, the index showed.

The downturn in Dangote’s wealth underscores Nigeria’s challenging economic environment, where his conglomerate primarily operates, according to the BBC.

Since President Bola Tinubu assumed office last year, he has introduced several economic reforms in Africa’s most populous nation, including the removal of fuel subsidies, which have contributed to high inflation, currently over 30 per cent.

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The sharp fall in the value of the naira has significantly affected Dangote, whose wealth is largely tied to assets denominated in the local currency.

The 66-year-old businessman made his wealth in the cement and sugar industries - and last year opened an oil refinery in Nigeria's economic hub, Lagos.

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His business empire, the Dangote Group, has also faced numerous setbacks in recent months due to production delays at its refinery and supply chain disruptions.

He was listed by Forbes magazine in January as Africa's richest man for the 13th year in a row despite the country's economic difficulties.

But the latest Bloomberg index places him second in Africa and 159th globally.

The rise in Rupert's net worth was buoyed by strong performances in the luxury goods sector.

As well as the Switzerland-based Richemont, his other holdings include Remgro, a South African investment vehicle with stakes in more than 30 companies, Bloomberg reports.

Nicky Oppenheimer, another South African billionaire, was ranked the third richest person in Africa with a net worth of $11.3 billion, followed by Nassef Sawiris, an Egyptian businessman, with a fortune of $9.48 billion.

South African investor Natie Kirsh completed the top five African billionaires list with $9.22 billion.

Like Forbes, the Bloomberg ranking monitors daily changes in the net worth of the world's wealthiest individuals.

The title of Africa's richest person may continue to change hands as market conditions fluctuate and businesses navigate complex challenges.