Some of the Oracle of Omaha's most-popular buys -- as well as Berkshire's largest holding -- offer robust upside potential in 2025.

Warren Buffett primarily buys large-cap stocks for Berkshire Hathaway's portfolio. Because of this focus on large-cap stocks, you probably won't be surprised that Buffett owns six stocks that are members of the Dow Jones Industrial Average (DJINDICES: ^DJI).

Buffett first invested in Verisign (NASDAQ: VRSN) in 2012, and at the time of this writing, the shares have gone on to increase by at least 325% since then. He continued to buy shares in 2013 and 2014, but it has been more than 10 years since he added to the position. Here's why he's coming back to Verisign now. Image source: The Motley Fool.

Warren Buffett is a big fan of portfolio concentration and placing large wagers on his best ideas. Kicking off 2025, roughly 80% ($238 billion) of the $297 billion portfolio Buffett is overseeing at Berkshire is invested in just nine unstoppable stocks.

Warren Buffett is one of the most popular, quotable investors in the world. The billionaire CEO of Berkshire Hathaway has a legendary investment track record, trouncing the return of the S&P

Investors often turn to Warren Buffett for advice for one good reason: He's proven his ability to navigate any investing waters -- from moments of euphoria to the doldrums -- and win over time. Buffett doesn't rush to buy the hottest stocks as markets soar and doesn't panic-sell during difficult periods.

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.

Think being a billionaire is all luxury and extravagance? Think again. Warren Buffett, one of the richest men alive, might surprise you. Buffett's daughter, Susan, says her dad is just normal. A guy who's not obsessed with his billions.