Grant Thornton Spain announced today that it will join the multinational professional services platform Grant Thornton Advisors, based in the United States. This move will enable the firm to grow in the coming years through expansion into new markets and the addition of new services, providing greater value to its clients.
The platform will equip the firm’s professionals and teams with advanced technologies and create new and attractive career development opportunities for current and future talent, while maintaining everything that has made the firm a reference player in the professional services market in Spain.
Grant Thornton Advisors, headquartered in the United States and backed by a group of investors led by New Mountain Capital, established its multinational platform in January 2025. This platform has driven a unique and cohesive multidisciplinary approach, offering a unified suite of Advisory, Legal, and Tax services, as well as independent audit and Assurance services in each market where the platform operates.
A Rapidly Expanding Platform
Alongside Spain, Grant Thornton Advisors also announced today the inclusion of Grant Thornton France and Grant Thornton Belgium, demonstrating the rapid expansion of its European operations. These new additions join firms already part of the platform conglomerate: Grant Thornton Ireland, UAE, Netherlands, Switzerland/Liechtenstein, Luxembourg, Cayman Islands, and Channel Islands.
This move decisively enhances seamless connectivity among these firms and clearly strengthens their service capabilities and reach across Europe. Clients will benefit from even broader access to high-quality services, industry expertise, and innovation, further reinforced by significant investments in technology and talent.
According to Ramón Galcerán, Chairman of Grant Thornton Spain, “Today’s step of joining the multinational Grant Thornton Advisors platform is historic and fills us with enthusiasm. It marks a new era of growth, expansion, and consolidation of our professional services model in Spain, recognized by clients as both close and of the highest quality. This platform has already demonstrated clear benefits for the firms within it, and as part of it, we will decisively drive our growth with unprecedented access to new technologies, knowledge, capabilities, and large-scale capital and investment.”
For Jim Peko, CEO of Grant Thornton Advisors LLC, “The platform’s expansion into France, Spain, and Belgium marks a decisive chapter in our journey and represents a radical shift in how our industry serves clients. We are strengthening our commitment to grow through new services, sectors, and geographies. We also aim for this platform to be a benchmark for new talent and technology, built on a solid foundation of quality and a unique corporate culture. We set out to build a distinctive project, and that is exactly what we are doing.”
Steve Tennant, CEO of Grant Thornton Ireland, highlights that “Ireland was the first pillar in Grant Thornton Advisors’ strategic multinational expansion, and we have seen firsthand the benefits of integrating our people, resources, and services into a unified platform. The inclusion of France, Spain, and Belgium reinforces that momentum, creating an unprecedented presence in the European Union and many other markets.”
In recent weeks, Grant Thornton Advisors has also announced acquisitions to strengthen its advisory offering, including Auxis, a pioneer in business outsourcing and modernization services, and Stax, specialized in commercial due diligence and value creation for the private equity sector.
The entire Grant Thornton Advisors platform will continue to be part of the Grant Thornton International Limited (GTIL) network, which brings together member firms in more than 150 markets worldwide, further consolidating the network’s relevance in the global professional services market. All transactions are expected to close in the coming weeks. Grant Thornton Spain was advised by PwC and Baker McKenzie.
About Grant Thornton Spain
With 40 years of experience in the Spanish market, Grant Thornton Spain is one of the country’s leading professional services firms, offering Audit & Assurance, Tax, Advisory, Legal, and Outsourcing services. The firm has a team of 900 professionals across 11 offices nationwide: Madrid, Barcelona, Bilbao, Castellón, Las Palmas, Murcia, Pamplona, Valencia, Vigo, and Zaragoza. It is part of the global professional services network Grant Thornton International, with 76,000 professionals present in more than 150 markets.
About Grant Thornton Advisors
Grant Thornton provides professional services in the United States through two specialized entities: Grant Thornton LLP, a certified public accounting (CPA) firm offering audit and assurance services, and Grant Thornton Advisors LLC (not a CPA firm), which provides exclusively non-certification-related services, including tax, financial advisory, and consulting. In January 2025, Grant Thornton Advisors LLC created a multinational, multidisciplinary platform offering top-tier advisory and tax services, as well as independent audit services. Grant Thornton is part of the Grant Thornton International Limited network, providing access to its member firms in more than 150 global markets.
About New Mountain Capital
New Mountain Capital is a New York-based investment firm focused on building and growing businesses, not debt, to achieve long-term capital appreciation. The firm currently manages private equity, credit, and net lease investment strategies with approximately $55 billion in assets under management. New Mountain Capital targets high-quality, growth-oriented companies in carefully selected industrial sectors and works closely with management teams to create value. For more information, visit newmountaincapital.com.
About Grant Thornton International
Grant Thornton International (GTI) is a global network of independent audit, Assurance, Tax, Advisory, and Legal firms serving private businesses, public sector clients, and listed companies. As an umbrella entity, Grant Thornton International does not provide services directly to clients; rather, its member firms, collectively known as Grant Thornton, deliver services in more than 156 markets with 76,000 professionals worldwide. GTI focuses on strategy, risk management, and quality control while supporting its member firms and promoting a cohesive global client experience.
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