Adrian Gosden, co-manager of the £6.1bn Artemis Income fund, will be leaving the firm later this month.
Gosden had been with the Artemis UK equity team for 13 years, joining in 2003.
Co-manager Adrian Frost, who leads the Artemis Income team, will continue to run the fund and a number of institutional income mandates also run by Gosden.
Artemis’ senior partner Mark Murray said: “In his time with us, Adrian has made a considerable contribution to Artemis. He will leave with our thanks and very best wishes.”