Pelham will handle the investment management firm's corporate and financial comms in the UK.
Close AM previously retained Polhill Communications and will continue to use the agency for comms around a number of offshore products. Close AM's parent firm, Close Brothers Group, continues to use Maitland for corporate and financial PR.
This month, Close AM bought Bristol-based IFA business Chartwell Group for £17m, to boost its private client business.
Close Brothers said that, because of this continued investment, its asset management arm was 'likely to deliver a small loss for the year'.