JUST IN: Legendary investor Warren Buffett has stepped down as chairman of Berkshire Hathaway, the company announced, having served in the role since 1970. Buffett, 96, is now chairman emeritus of the company and will remain a director. Read more: ↧ Warren Buffett steps down as Berkshire Hathaway chairman Warren Buffett stepped down as chairman of Berkshire Hathaway, the company announced in a statement published early on Friday, having served in the role since 1970.