Warren Buffett served as the CEO of the Berkshire Hathaway (NYSE: BRKA)(NYSE: BRKB) holding company from 1965 to 2025. It became a trillion-dollar conglomerate under his leadership, with numerous wholly owned subsidiaries and a $300 billion portfolio of publicly traded stocks and securities.

At the start of 2026, Buffett handed the reins to his chosen successor, Greg Abel, who has some big shoes to fill. Abel kicked off his tenure by purchasing $235 million worth of his predecessor's favorite stock -- but you won't find it in Berkshire's portfolio. READ MORE