This is what I found on Bloomberg:

The numbers are mind-boggling: $70,000 per minute, $4 million per hour, $100 million per day.

That’s how quickly the fortune of the Waltons, the clan behind Walmart Inc., has been growing since last year’s Bloomberg ranking of the world’s richest families.

Other American dynasties are close behind in terms of the assets they’ve accrued. The Mars family, of candy fame, added $37 billion, bringing its fortune to $127 billion. The Kochs, the industrialists-cum-political-power-players, tacked on $26 billion, to $125 billion.

Walmart is the world’s largest retailer by revenue, with sales of $514 billion from more than 11,000 stores worldwide. Family holding company Walton Enterprises owns half the retailer, a stake that’s the foundation of the world’s biggest fortune.

Information provided by Bloomberg.

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