Seth Andrew Klarman, born May 21, 1957, is an American billionaire investor, hedge fund manager, and author. He is the chief executive and portfolio manager of the Baupost Group, a Boston-based private investment partnership he founded in 1982. Klarman is a proponent of value investing, closely following the investment philosophy of Benjamin Graham. He is known for buying unpopular assets while they are undervalued, seeking a margin of safety and profiting from any rise in price.