In 2021, Buffett’s company, Berkshire Hathaway, purchased 107 million shares of Nu Holdings, the parent company of Nubank, for a total investment of $750 million. Since then, it has not sold a single share. Nu’s share price surged by 106% since the investment, reaching a peak value of over a billion dollars in February 2022. This increase in share price enabled Buffett to make an approximate $250 million in paper profits.