Berkshire Hathaway said Warren Buffett will step down as chairman and become chairman emeritus, effective immediately, nine months after handing the CEO reins to longtime lieutenant Greg Abel. The company named his son, Howard Buffett, as chairman ▻ ↧ Warren Buffett steps down as Berkshire chairman, son Howard succeeds Warren Buffett is credited with transforming Berkshire from a failing textile company into a $1.1 trillion conglomerate while building an investment philosophy that influenced generations of investors and executives.