SINGAPORE--U.S. private-equity firm TPG Capital has agreed to sell its entire stake in Myanmar's largest spirits maker to one of Thailand's richest people in a deal valued at close to $500 million. TPG said Friday it would sell its 50% stake in Myanmar Distillery Company Group through its investment arm Alliance Asia Investment Pvt. Ltd. to Thai Beverage PCL (Y92.SG), which is owned by billionaire Charoen Sirivadhanabhakdi. According to Forbes, Mr. Charoen is Thailand's second-richest person with a net worth of $18.5 billion.