Which of his top five stocks is the best pick depends on your investing style. The best overall stock, though, could be the one to which Buffett has given the highest praise. However, Buffett has over $1 trillion of Berkshire's portfolio invested in other publicly traded companies.

Thanks to an acquisition in 1998, the Oracle of Omaha has a bigger stake in the AI revolution than most investors realize.

An exchange-traded fund keyed to Warren Buffett’s Berkshire Hathaway equity portfolio has attracted nearly $250 million since its inception in March. The VistaShares Target 15 Berkshire Select Income ETF holds 21 stocks—20 in Berkshire’s portfolio plus 10% of its assets in Berkshire’s Class B shares.