Rattray joined the world's largest listed hedge fund in 2007. He has been CIO since 2016, according to his LinkedIn profile, and ran the firm's flagship quantitative investment platform Man AHL before that. He will leave Man Group during the second half of 2021, the company said.

Man Group's board intends to appoint Antoine Forterre, currently co-CEO of Man AHL, as the group's chief financial officer, it said in a statement.

(Reporting by Carolyn Cohn; Editing by Rachel Armstrong)