Grant Thornton Spain has formalized 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. The platform follows a joint strategy supported by investment from the U.S. fund New Mountain Capital, which will be directed toward advanced technology to strengthen service lines, specialized and global talent, and a commitment to quality that defines Grant Thornton’s way of working.
The definitive closing of the transaction, announced last September, has been endorsed by the Spanish partnership and consolidates Spain’s position as a key player within Europe. In fact, Grant Thornton Advisors recently appointed Stephen Tennant as its CEO for Europe, the Middle East and Africa, reporting to Jim Peko, who serves as the global CEO of the new platform.
With this development, the new conglomerate of firms—while remaining part of Grant Thornton International—now includes a total of 15 countries, among them the United States, Ireland, France, Belgium, Luxembourg, the Netherlands, Switzerland/Liechtenstein, the Cayman Islands, the Channel Islands, the United Arab Emirates, along with the recently announced additions of Brazil, New Zealand and Poland.
Beyond the Grant Thornton firms, the platform has also incorporated the U.S. firm Auxis, a pioneer in outsourcing and business modernization services, and Stax, which specializes in commercial due diligence and value creation for the private equity sector.
“Being part of this platform represents a great opportunity to continue generating value for our international clients, sharing global capabilities and strengthening our distinctive proposition from Spain. Now it is time to begin working intensively and integrating with all members of the platform so that our clients and professionals quickly perceive the benefits of this incorporation,” emphasized Ramón Galcerán, chairman of Grant Thornton Spain.
The Grant Thornton Advisors platform, launched in early 2025 with the support of an investor consortium led by New Mountain Capital, establishes a new way of operating as a global network, enabling participating firms to share capabilities, resources and strategies under a unified operating framework. The objective is to enhance efficiency, sector coverage and client experience in international projects, while preserving each firm’s local footprint.
Grant Thornton Spain—with nearly 900 professionals and a presence in 10 cities—has positioned itself as one of the most dynamic firms within the network, thanks to its specialization in sectors such as financial services, mobility and energy, and its ability to design creative solutions tailored to the new challenges of the middle market. Its integration into the platform will accelerate innovation, the development of new shared services and stronger coordination on 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 views this model as a way to address the challenges of an increasingly interconnected marketplace.
With this integration, Grant Thornton Spain strengthens its role as a bridge between Europe, Latin America and other key regions, taking a decisive step in its growth strategy across high-value consulting, audit, legal, tax and outsourcing projects.
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