Damien Hirst, Abalone Acetone Powder, 1991

Chris Rokos is leaving Brevan Howard Asset Management LLP, according to people familiar with the matter, the third of five co-founders to quit the $36.7 billion hedge fund since 2009.

Alan Howard founded Brevan Howard in 2002 with four other traders from Credit Suisse Group AG’s proprietary fixed-income trading desk. With Rokos’s departure, only Trifon Natsis will remain working with Howard, the firm’s chief investment officer. James Vernon, the chief operating officer, who represented the “V” in Brevan Howard’s name, left the firm last year. Jean- Philippe Blochet, the “B”, in late 2009.

“I am grateful for the friendships I have made along the way,” Rokos said today in an e-mail to Brevan Howard employees. “I am especially grateful to Alan for his confidence and his guidance through varied and sometimes tumultuous markets over our 14 years working together at Credit Suisse and Brevan Howard. The firm has a deep bench as it has ever enjoyed and I have every confidence that it will continue to thrive.”

Rokos said in the memo he hasn’t decided what he’ll do next.

Read More: SFGate