Edinburgh Fund Managers has hired Polhill Communications to improve its business profile.
Polhill replaces Broadgate.
The company says it took the decision because its strategy has changed dramatically since it took over Dunedin Fund managers two year ago.
Sales and marketing director Nigel Whittingham says: "Today Edinburgh Fund Managers has transformed the nature of its £6.5bn business. EFM is now an innovative provider of active, passive and protected funds to the retail and institutional markets."