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.

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.

Arguably the world's greatest stock picker isn't picking many stocks these days. Warren Buffett has been a net seller of stocks for eight consecutive quarters. There's a reason Buffett isn't buying many stocks -- and it's the same reason he ranks among the greatest investors of all time.

There's one laggard in the Berkshire Hathaway portfolio that can turn things around this year. Bonus: It also happens to come with a 4.7% yield.