Neptune head of strategic partnerships John Lester and two of his team are leaving the firm to set up their own investment boutique.
Lester leaves the firm after six years with head of UK strategic partners Dennis Pellerito and junior sales support member Andrew Nickson also leaving the firm.
The move comes as Neptune announces plans to review the structure of its UK retail sales team.
Neptune Investment Management deputy managing director Richard Green says: “Since entrepreneurial spirit remains integral to our culture at Neptune, I accept that there will be occasions when those involved in Neptune’s earlier successes, should aspire to try and achieve it again elsewhere, at a more senior level. We wish them well.”