He will join the company by 27 June.

He replaces Dick Weil who will retire as CEO and from the asset manager at the end of the month. He will continue to act as an adviser to the firm until the end of June.

Roger Thompson, CFO of Janus Henderson, will act as interim CEO until Mr Dibadj takes up his new role.

Mr Dibadj has been CFO and head of strategy for asset manager AllianceBernstein since February 2021 as well as being portfolio manager for AB Equities at the firm since 2017.

He was AllianceBernstein’s head of finance and head of strategy from April 2020 to February 2021. He co-led AB’s strategy committee in 2019 and served as a senior research analyst with Bernstein Research Services from 2006 to 2020.

Prior to joining AllianceBernstein he spent a decade in management consulting, including at McKingsey & Company and Mercer.

Richard Gillingwater, chairman at AliianceBernstein, said, “As part of our CEO transition planning, we conducted an extensive internal and external search to identify an executive who both understands our business and has the necessary strategic expertise to help drive the firm’s next phase of growth for the benefit of our clients and shareholders. The Board is confident that Ali is the ideal choice to lead this great company into its next phase of growth and value creation.”

Mr Dibadj will also join the firm’s Board.

Janus Henderson is a global active asset manager with approximately $432bn in assets under management worldwide. It is headquartered in London and has 2,000 employees.