We are Grant Thornton

Chicago, Illinois


James Fortosis



Executive summary


Jim Fortosis is a principal and deputy general counsel in the Risk, Regulatory & Legal Affairs group at Grant Thornton, where he manages securities and professional malpractice litigation and regulatory enforcement investigations. He conducts training on risk management issues and counsels the Audit & Assurance and Advisory service lines and the firm’s investment adviser subsidiary on compliance, risk and regulatory matters. He also has significant experience advising on strategic firm initiatives. In addition, he currently serves on Grant Thornton’s Partnership Board, which helps govern the partnership and the firm’s direction.


Prior to joining Grant Thornton, Fortosis was an attorney in the litigation practice at Sidley Austin LLP where he represented public companies and accounting firms and their professionals in securities litigation and government investigations.



Professional qualifications and memberships


  • Bar Admission – Illinois
  • Association of Corporate Counsel


Select presentations and publications


  • "Independence, Valuation, and Other Trends in Accounting Litigation,” American Law Institute Continuing Legal Education, Accountants’ Liability Conference, 2023 
  • “Efficient and Early Resolutions: Best Practices to Resolve Disputes Sooner Rather than Later,” Association of Corporate Counsel Continuing Legal Education, 2022
  • “Confronting Reports of Illegal Conduct: Strategies for Public Companies and Auditors,” Association of Corporate Counsel Continuing Legal Education, 2021
  • “Arizona Non-Lawyer Ownership in Law Firms & Implications for Accounting Firms,” Bloomberg Law, 2020





Fortosis received his bachelor’s degree in Political Science from Wheaton College and his juris doctor from The University of Chicago Law School.



Search for people at Grant Thornton


Enter a name and/or keywords such as service area, industry or location to get to know our business leaders — partner, principal or managing director. We look forward to hearing from you.