Warren Buffett stepped down as CEO of Berkshire Hathaway (BRK.B) at the end of 2025, and although he remains chairman, the holding company's stock portfolio is under new management.
Buffett always handled the largest positions in the Berkshire Hathaway portfolio, but those days are no more. The greatest long-term investor of all time still keeps his hand in and plays a key advisory role. Investment manager Ted Weschler also continues to manage perhaps 5% of Berkshire's stock investments.