The firm says the deal will allow it to expand its presence in Jersey as part of its growth strategy.
Sanne’s clients and staff from the private client services business will be transferring to JTC as part of the transaction.
“We are delighted to complete this transaction and welcome Sanne’s private client team and clients to JTC,” JTC CEO Nigel Le Quesne said.
“It is an attractive acquisition for us that will allow us to further expand our market leading private client business, and specifically our well-established Jersey office.
“We have strong acquisition experience to ensure that this is a positive and seamless transition for both clients and new colleagues, and I look forward to us all working together towards shared goals of service excellence and innovation.”