People

Susan E. Ryba

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Susan E. Ryba focuses her practice on federal tax controversy matters and tax litigation, particularly advising clients in the technology, healthcare, and pharmaceutical sectors, as well as high-net-worth individuals and complex partnerships.

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Results
  • Resolved on favorable grounds a multibillion-dollar transfer pricing dispute for a technology company involving several intercompany services transactions with IRS Exam
  • Facebook, Inc. v. Commissioner, 164 T.C. No. 9 (May 22, 2025). Taxpayer victory in a multibillion-dollar section 482 transfer pricing dispute regarding the arm’s-length value of a platform contribution transaction between cost-sharing participants under Treas. Reg. § 1.482-7.*
  • Resolved several multibillion-dollar tax controversies at the IRS Appeals for technology and pharmaceutical companies involving transfer pricing issues, including intercompany licenses of intangible property, intercompany services, and platform contribution transactions

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Recognitions
  • Legal 500 US, Recommended, 2025
  • Lawdragon, Leading Global Tax Lawyer, 2025
  • Crain’s Chicago Business, Notable Woman in Law, 2022
  • International Tax Review World Tax, 2015-2023 and 2025-2026
Capabilities and Industries
Regional Markets
Community
  • The Chicago Bar Association, member
  • Illinois State Bar Association, member
  • American Bar Association, member

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Credentials
Education
  • The Ohio State University Moritz College of Law, JD, magna cum laude, Order of the Coif
  • Cornell University, BS, magna cum laude
Admissions
  • Illinois
Courts / Agencies
  • US Tax Court
  • US District Court for the Northern District of Illinois
  • US Court of Appeals for the Second Circuit