Robyn Grew was appointed CEO of Man Group, succeeding Luke Ellis effective Sept. 1.
A spokeswoman confirmed the appointment.
Mr. Ellis will remain CEO and an executive director of the $144.7 billion money manager until that date, ensuring an orderly transition. He was appointed CEO in 2016.
Ms. Grew is president of Man Group, based in the U.S. She will relocate to the U.K. following her appointment as CEO but will continue to spend time in the U.S. given Man Group's presence there, a news release said. She was appointed president in July, replacing Shanta Puchtler.
Her responsibilities as president span investment divisions, risk, technology, legal and operations. Ms. Grew will take some time to decide on the structure of her senior management team and reporting lines for various functions, including her existing responsibilities, according to a person familiar with the firm. Ms. Grew joined Man Group in 2009.
"Robyn is a dynamic, strategic leader with deep operational and commercial expertise, who knows the firm inside-out and is the perfect fit to take the firm on the next phase of its journey," John Cryan, chairman of Man Group, said in the release.
The board's nomination committee has continually reviewed and discussed succession plans, the release added, which has included identifying potential internal successors for the CEO role.
Man Group will have a female CEO and a female chair of its board by year-end, with Anna Wade set to replace Mr. Cryan later this year.