Grant Thornton Multinational Platform Adds Grant Thornton Switzerland/Liechtenstein and Grant Thornton Channel Islands

New Mountain Capital-backed Grant Thornton Advisors platform acquires Grant Thornton UAE

April 23, 2025

Professional Services

Grant Thornton UAE announced it reached an agreement to unite with Grant Thornton Advisors LLC, adding the UAE firm to the multinational Grant Thornton Advisors platform. The platform is backed by an investor group led by New Mountain Capital and is intended to broaden unified advisory and tax capabilities across regions and service lines.

New Mountain Capital-Backed Grant Thornton Advisors to Combine With Grant Thornton Ireland Advisory and Tax Businesses

October 24, 2024

Professional Services

Grant Thornton Advisors LLC (U.S.) and Grant Thornton Ireland announced an agreement to combine Grant Thornton Advisors with Grant Thornton Ireland’s advisory and tax businesses. The deal is backed by an investor group led by New Mountain Capital and is expected to close in the first quarter of next year, subject to regulatory approval.

New Mountain Capital Makes Growth Investment in Grant Thornton LLP

March 15, 2024

Accounting & Tax

New Mountain Capital has made a growth investment in Grant Thornton LLP to accelerate the firm's business strategy, support targeted investments in talent, technology and infrastructure, and enable strategic acquisitions. The transaction (subject to regulatory approvals) will adopt an alternative practice structure separating attest and non-attest services, and is expected to close in the second quarter of 2024.

Guidehouse Acquires Grant Thornton Public Sector Advisory Practice

August 22, 2022

Professional Services

Guidehouse, a Veritas Capital portfolio company, signed an agreement to acquire Grant Thornton LLP’s Public Sector Advisory practice. The deal brings additional public-sector consulting professionals to Guidehouse and is expected to close in the second half of 2022; it was later completed on October 3, 2022.

Grant Thornton Advisors Acquires Stax

September 22, 2025

Professional Services

Grant Thornton Advisors LLC has closed its transaction to acquire Stax, a strategy consulting firm focused on commercial due diligence, value creation, and exit-planning services for private equity firms and their portfolio companies. The deal adds Stax’s ~300 team members to Grant Thornton Advisors’ multinational transaction advisory platform, with the combined firm serving almost 70% of the U.S.-based Private Equity International 300.

Stirling Square Acquires Majority Stake in Gestión Tributaria Territorial (GTT) from AnaCap

June 7, 2023

Software

Stirling Square Capital Partners has acquired a majority stake in Gestión Tributaria Territorial (GTT), a Spain-headquartered tax software provider, from AnaCap, which will remain invested as a minority alongside GTT management. Stirling Square plans to support GTT by investing in its software platform, diversifying product offerings and pursuing strategic acquisitions to accelerate growth across Europe.