Pursuits

Twitter’s Dorsey Becomes Billionaire as Square Valuation Soars

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Twitter Inc. co-founder Jack Dorsey, 35, has joined the ranks of the world’s billionaires.

Dorsey’s mobile payment company, Square Inc., is in the process of closing a $200 million investment by Rizvi Traverse Management LLC, valuing the company at $3.2 billion, according to a report Wednesday by PrivCo, a New York-based research firm that specializes in private companies’ financial data.