Signes, which provides accounting, administration and tax compliance services to institutional investors, will be renamed JTC Signes and will run as a sister company to JTC’s own Luxembourg based operation.
Last month, JTC bought the Channel Islands and South African fund administration businesses of Kleinwort Benson, bringing its funds under administration to $56bn (£36.7bn).
Signes co-founders Eric Biren – who is also managing director and Vincent Goy – who is also chairman – will continue in their roles following the deal.
The business will remain at its offices in Boulevard de la Pétrusse, where JTC’s existing Luxembourg team will join them.
JTC group chief executive and chairman Nigel Le Quesne said the deal supported its expansion strategy and accelerated its European growth from Luxembourg, which he described as “such an important financial services centre in the heart of Europe.”
He added the transaction further demonstrated its commitment to servicing institutional clients in key global financial centres.
A statement from Goy and Biren said: “The transaction with JTC is very much based on our entrepreneurial synergies and gives us the unique opportunity to expand our own service offering, take our clients into the regulated world and join the growing successful international network that JTC is now synonymous with.”