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Chobani is best known for popularizing Greek yogurt in the US, but the closely held business is now being valued like a technology company. The firm is touting a rich valuation — $20 billion according to the New York Times — following a recent $650 million equity investment from an unnamed backer. That’s boosted the wealth of founder and majority owner Hamdi Ulukaya to more than $11 billion, according to the Bloomberg Billionaires Index , putting him among the ranks of the world’s 500 richest people for the first time.