Grant Thornton Spain completes its integration into the multinational platform Grant Thornton Advisors
The transaction strengthens the Firm’s leadership in delivering cross-border professional services, with a focus on technology, talent and quality
The platform already has a presence in 15 countries, with collaboration now expanding across Europe, the Americas and Asia.
Grant Thornton Spain has formalised its incorporation into the multinational platform Grant Thornton Advisors, a reinforced collaborative structure that brings together leading firms within the Grant Thornton network to boost the delivery of cross-border professional services. It operates under a joint strategy driven by investment from the US-based fund New Mountain Capital, which will be channelled into advanced technology, specialised global talent, and a commitment to quality that defines Grant Thornton’s way of working.
The final closing of the transaction, announced last September, has been endorsed by the Spanish partnership and consolidates Spain’s position as a key player in Europe. In fact, Grant Thornton Advisors has recently appointed Stephen Tennant as its CEO for Europe, the Middle East and Africa, reporting to Jim Peko, who serves as global CEO of the new platform.
With this development, the new conglomerate of Firms — which will continue to be part of Grant Thornton International — now comprises 15 countries, including the United States, Ireland, France, Belgium, Luxembourg, the Netherlands, Switzerland/Liechtenstein, Cayman Islands, Channel Islands, the United Arab Emirates, and the recently announced additions of Brazil, New Zealand and Poland.
In addition to Grant Thornton firms, the platform has also incorporated the US-based firm Auxis, a pioneer in business outsourcing and modernisation services, and Stax, specialised in commercial due diligence and value creation for the private equity sector.
“Joining this platform represents a major opportunity to continue creating value for our international clients, sharing global capabilities and strengthening our differentiated offering from Spain. Now it is time to begin working intensively and integrating with all the members of the platform, so that our clients and professionals quickly perceive the benefits of this incorporation,” emphasised Ramón Galcerán, Chairman of Grant Thornton Spain.
The Grant Thornton Advisors platform, launched in early 2025 with the backing of an investor consortium led by New Mountain Capital, establishes a new way of operating within a global network. It enables participating firms to share capabilities, resources and strategies under a unified operating framework. The aim is to enhance efficiency, sector coverage and client experience in international projects, while preserving each firm’s local roots.
Grant Thornton Spain, with nearly 900 professionals across 10 cities, has positioned itself as one of the network’s most dynamic firms, thanks to its specialisation in sectors such as financial services, mobility and energy, and its ability to design creative solutions tailored to the challenges faced by the middle market. Its integration into the platform will accelerate innovation, the development of new shared services and greater coordination in multijurisdictional projects.
The transaction, originally announced in September 2025, marks a new milestone in the evolution of the Grant Thornton International Ltd. network, which maintains a presence in over 150 markets through its member firms, and which is committed to this model as a way to address the challenges of an increasingly interconnected market.
With this integration, Grant Thornton Spain strengthens its role as a bridge between Europe, Latin America and other key regions, and takes a decisive step forward in its growth strategy in high value-added consultancy, audit, legal, tax and outsourcing services.