D aniel Och is an American billionaire hedge fund manager and the founder of Och-Ziff Capital Management, which has since been rebranded as Sculptor Capital Management. After a successful career at Goldman Sachs, where he became the head of proprietary trading in the equities division, Och founded his own hedge fund in 1994 with a reported $100 million in seed capital from the Ziff brothers.

He built his firm into one of the largest and most successful hedge funds in the world, with a multi-strategy approach to investing. He took the company public in 2007 in one of the first major hedge fund IPOs. However, his later years at the firm were marred by a major bribery scandal in Africa, which led to the firm paying a massive fine to U.S. authorities. Och eventually stepped down as CEO and chairman and has since been involved in a public and acrimonious battle with the new leadership of the firm he founded. He now manages his personal fortune through his family office, Willoughby Capital.