Since Warren Buffett became the CEO of Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) in 1965, its stock has delivered a compound annual return of 19.8%. You won’t ever see Buffett chasing the latest stock market trend — not even one as powerful as artificial intelligence (AI). With that said, three of the existing stocks in Berkshire’s $296 billion portfolio of publicly traded securities are integrating AI into their legacy businesses in very unique ways.