Grant Thornton Advisors expands multinational platform with Switzerland and Liechtenstein

November 5, 2025- Grant Thornton Switzerland/Liechtenstein has completed a transaction that makes it part of the Grant Thornton Advisors multinational platform, further enhancing the platform’s position as a leading provider of cross-border services underpinned by investments in technology, people, and quality.

This follows recently announced transactions with other European Grant Thornton member firms, including those in Ireland, France, Spain, Belgium, Luxembourg, Netherlands, the Channel Islands and Poland— along with Grant Thornton firms in the United Arab Emirates, the Cayman Islands and New Zealand.

The platform also includes Auxis, a pioneer in outsourcing and business modernization services, and Stax, which specializes in commercial due diligence and value creation.

The addition of Switzerland/Liechtenstein strengthens the platform’s unified advisory and tax solutions, as well as its independent audit and assurance practices. The expansion also enhances Grant Thornton’s network of professionals in key European financial hubs, including Zurich and Geneva, alongside existing presences in Bermuda, the Cayman Islands, and UAE.

The Grant Thornton multinational platform, first established in January 2025, now extends from the Americas across Europe and the Middle East to the Asia Pacific region. It is supported by an investor group led by New Mountain Capital, a growth-oriented investment firm with approximately $55 billion in assets under management.

The expanded platform remains part of the Grant Thornton International Limited network, which includes member firms in more than 150 markets worldwide.

The transaction was originally announced in June 2025.

About Grant Thornton 

Grant Thornton delivers professional services in the US through two specialized entities: Grant Thornton LLP, a licensed, certified public accounting (CPA) firm that provides audit and assurance services ― and Grant Thornton Advisors LLC (not a licensed CPA firm), which exclusively provides non-attest offerings, including tax and advisory services.

In January 2025, Grant Thornton Advisors LLC formed a multinational, multidisciplinary platform. The platform offers a premier advisory and tax practice, as well as independent audit practices. With offices across the Americas, Europe and the Middle East, the platform delivers a singular client experience that includes enhanced solutions and capabilities, backed by powerful technologies and a roster of more than 18,000 quality-driven professionals enjoying exceptional career-growth opportunities and a distinctive cross-border culture.

Grant Thornton is part of the Grant Thornton International Limited network, which provides access to its member firms in more than 150 global markets.

Grant Thornton LLP, Grant Thornton Advisors LLC and their respective subsidiaries operate as an alternative practice structure (APS). The APS conforms with applicable laws, regulations and professional standards, including those from the American Institute of Certified Public Accountants. 

“Grant Thornton” refers to the brand under which the member firms in the Grant Thornton International Ltd (GTIL) network provide services to their clients and/or refers to one or more member firms. Grant Thornton LLP and Grant Thornton Advisors LLC serve as the U.S. member firms of the GTIL network. GTIL and its member firms are not a worldwide partnership and all member firms are separate legal entities. Member firms deliver all services; GTIL does not provide services to clients. 

About Grant Thornton Switzerland/Liechtenstein 

Grant Thornton Switzerland/Liechtenstein is a renowned audit and advisory firm with a well-established tax department and extensive experience in outsourcing. The firm is run by 24 partners and employs around 220 specialists in Switzerland and Liechtenstein at its branches in Schaan, Zurich, Geneva and Buchs. Grant Thornton Switzerland/Liechtenstein has strong local roots and, as a member of Grant Thornton’s international network, is linked at a global level. The scale of its operations as well as its concessions and licences permit Grant Thornton to meet the demands of discerning clients in both a national and international context.

About New Mountain Capital 

New Mountain Capital is a New York-based investment firm that emphasizes business building and growth, rather than debt, as it pursues 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 seeks out what it believes to be the highest quality growth leaders in carefully selected industry sectors and then works intensively with management to build the value of these companies. For more information on New Mountain Capital, please visit newmountaincapital.com.