The news comes as KBL European Private Bankers (KBL epb), parent company of Brown Shipley, acquired the Dutch private bank last year.
As part of the acquisition, Brown Shipley will integrate IdB’s former London branch, 27 employees and nine relationship managers, into its office.
It will also add £1.5bn of assets under management (AUM), making the firm’s total £7.5bn.
Brown Shipley said it was part of the strategy to strengthen its London presence.
Ian Sackfield, chief executive officer at Brown Shipley, said: “I am delighted to announce the acquisition and integration of this successful team which will further develop Brown Shipley’s capabilities in London, an area of significant strategic importance to the overall business.
“The team’s expertise and experience looking after the wealth of international clients will further broaden both our proposition and opportunities.”
The firm most recently acquired The Roberts Partnership, a Manchester-based financial planning and wealth management company, formally integrating the business in May this year.