Simpson Thacher is representing Grant Thornton Advisors LLC (“Grant Thornton Advisors”) and funds managed by New Mountain Capital LLC in connection with Grant Thornton Advisors’ acquisition of Stax LLC (“Stax”), a leading strategy consulting firm specializing in commercial due diligence, value creation and exit planning services for private equity firms, as well as their portfolio companies and advisors.
Headquartered in Boston with a presence across key financial markets, Stax provides buy- and sell-side diligence and planning for merger and acquisition (M&A) activities, while delivering clients with growth strategies and value creation initiatives. The firm’s data-driven approach taps into leading AI and advanced intelligence to deliver actionable insights and proven successes for its clients.
The transaction grows the multinational, muti-disciplinary platform that Grant Thornton Advisors established in January 2025. To date, Grant Thornton Advisors has announced transactions with several accounting and consulting firms to join the platform, including those in Ireland, the UAE, Switzerland/Liechtenstein, the Netherlands, Luxembourg, the Cayman Islands and the Channel Islands. Additionally, Grant Thornton Advisors announced a deal last month to acquire Auxis, a U.S.-based leader and pioneer in outsourcing and business modernization services. Simpson Thacher has represented Grant Thornton Advisors in connection with each of these transactions.
The Simpson Thacher team includes Ben Schaye, Louis Argentieri, Samyel Lee, Amy Zhou, Peter Cusick and Sichen Zhang (M&A); Andrew Blau, Linda Barrett, Allison Sutherland, Nicolas Deguines and Benjamin Faber (ECEB); Andrew Purcell and Roberto Arza (Tax); Daniel Levien, Shuhao Fan and Brian Japari (Anti-Corruption/Compliance); Peter Guryan and Rick Jamgochian (Antitrust); and Caroline Geiger and Chandler Gerard-Reimer (Intellectual Property & Data Privacy).