Warren Buffett-led Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) had a substantial investment in General Motors (NYSE: GM). According to Berkshire's SEC filings, the conglomerate owned 50 million shares of GM at the beginning of that year,

Warren Buffett is one of the better-known and successful investors. His Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) portfolio has consistently outperformed the S&P 500 (SNPINDEX: ^GSPC) since its inception in the mid-1960s.

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.

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

Berkshire took a new stake in Citigroup ( C 1.88%) in 2022 and the stock currently makes up 1.5% of Berkshire's portfolio. Citigroup has far and away been the worst-performing large U.S. bank stock since the Great Recession and many investors have ditched the stock out of frustration.