Berkshire sold 20.7 million of those shares in the third quarter of 2024, but its 86.4 million remaining shares are still worth $949 million and give it a 1.8% stake in the company. Berkshire's stake in Nu only accounts for 0.3% of its entire portfolio, but the Latin American bank is still growing much faster than its brick-and-mortar competitors.

Warren Buffett is known for his investing success, generating market-beating returns over the long run. As chairman, he's helped Berkshire Hathaway deliver a compounded annual gain of more than 19% over 58 years -- that's as the S&P 500 posted a compounded increase of about 10% during that period.

While many investors poured into the stock market last year, legendary investor Warren Buffett eased on the brakes. Berkshire Hathaway, the investment company Buffett founded and still leads,

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The Oracle of Omaha has more than enough justification to add to the roughly $78 billion he's spent buying shares of his favorite stock since mid-July 2018.