Grant Thornton expands with acquisitions in France, Spain, and Belgium

ILLINOIS, UNITED STATES — Grant Thornton Advisors has expanded its global platform with the acquisition of Grant Thornton’s operations in France, Spain, and Belgium, reinforcing its footprint across Europe. 

According to Grant Thornton’s press release, this move strengthens its presence in Europe and enhances its ability to deliver integrated services across key markets.

“Expanding the platform into France, Spain, and Belgium is a defining chapter in our journey and represents a sea change in how our industry serves clients. We’re furthering our commitment to growth across services, industries, and geographies,” said Jim Peko, Chief Executive Officer (CEO) of Grant Thornton Advisors.

Grant Thornton France, Spain, Belgium join global tax advisory platform

Grant Thornton provides audit, assurance, and tax advisory services, as well as offering exclusive tax and advisory solutions. And this strategic expansion will enable the company to develop additional capacities, as demonstrated by its establishment of a multinational platform in 2025, which involves 14,000 professionals and powerful technologies, offering an improved and integrated client experience. 

Grant Thornton France, as one of the pillars of the international network, reflects its global vision through its extensive local presence, comprising 24 offices and over 2,800 professionals in France. The company offers four primary lines of service: audit, advisory, accounting and reporting, tax, and legal.

Similarly, Grant Thornton Spain has a strong reputation within the Spanish market over the past 40 years, as it is ranked as one of the most successful companies in the audit, tax, and advisory services sector, with 900 professionals in 11 offices operating throughout the country.

To complete the European group, Grant Thornton Belgium is a full-service business advisor offering a comprehensive range of audit, accounting, tax, and advisory services to clients of all sizes across its seven locations. Its 250-plus employees can interact with and leverage the industry and technical expertise of member firms worldwide. 

Grant Thornton recently ranked #34 in the OA500 2025, an objective index of the world’s top 500 outsourcing companies.

European expansion strengthens global platform

These companies are also sources of good market knowledge, essential industry connections, and a strong customer base that spurs the success of the platform. 

This move will enhance the services provided by the firm and improve cross-border client solutions through a major investment in technology and talent. 

“Today’s news is yet another example of our commitment to invest in people, technology, and expanded capabilities for the ultimate benefit of Grant Thornton’s clients,” said Andre Moura and Nikhil Devulapalli, Managing Directors at New Mountain Capital.

Grant Thornton Advisors now operates across 11 countries, with its European expansion further solidifying its position in the global market. By uniting advisory, tax, and audit services, the platform offers clients a seamless experience backed by a robust international network.

Private equity-backed growth and strategic acquisitions

Supported by New Mountain Capital, Grant Thornton Advisors has been following a high-growth model through acquisitions, which have been funded by private equity. 

As the firms of the U.S., Ireland, the United Arab Emirates, and more start appearing, the platform is spreading throughout Europe and elsewhere. The company has also invested in its complementary business, including Auxis and Stax, which complement its advisory services. Combining these companies can boost growth, enhance customer solutions, and increase the international presence.

The growth of Grant Thornton Advisors through new acquisitions in France, Spain, and Belgium strengthens its status as a world leader in advisory services. 

These acquisitions and investments undertaken by the firm aim to ensure long-term growth and improved service delivery to its customers across the global market.

“We’re solidifying Grant Thornton as the platform of choice for talent and technology, underpinned by exceptional quality and our one-of-a-kind culture,” Peko noted.