Photo, Thomas R. May

Thomas R. May

Baker & McKenzie LLP


Thomas May has been advising multinationals on complex US and foreign tax issues for almost 30 years. He has a broad range of experience but has focused his practice primarily on spin-offs, mergers and acquisitions, and the tax-efficient structuring of international operations. Mr. May is recommended in international tax by The Legal 500 and World Tax. He is also consistently named by Legal Media Group's Expert Guides as a leading transfer pricing expert in the United States. His clients have described Mr. May as “extremely talented” and “extremely responsive, insightful.” Most recently, Mr. May has devoted a substantial portion of his time advising clients on the international aspects of the Tax Cuts and Jobs Act of 2017 and the regulations issued thereunder (including challenges to their validity).

Practice Focus

Mr. May focuses on US federal income taxation with an emphasis on mergers and acquisitions and international tax planning.

Representative Legal Matters

Mr. May's representative transactions include:

  • Gebr. Knauf KG's USD 7 billion acquisition of USG Corporation (NYSE:USG);

  • Natura SA's USD 2 billion acquisition of Avon Products (NYSE: AVP);

  • LVMH's USD 3.2 billion acquisition of the Belmond Ltd. (NYSE: BEL);

  • FedEx Corporation's (NYSE:FDX) USD 4.8 billion acquisition and post-acquisition integration of TNT Express NV;

  • Dia-Ichi Life Insurance Company's USD 5.7 billion acquisition of Protective Life Insurance Company (NYSE: PL);

  • Sony Corporation's USD 2.3 billion acquisition and post-acquisition integration of EMI music publishing business;

  • Corbion NV in its USD 1.4 billion divestment (including spin-offs) of its CSM Bakery Supplies businesses to Rhône Capital;

  • Ecolab, Inc.'s (NYSE:ECL) USD 8 billion acquisition of Nalco Holding Company (NYSE:NLC);

  • Danaher Corporation's USD 1.1 billion acquisition of the AB Sciex and Molecular Devices businesses;

  • Agilent Technologies Inc.'s (NYSE:A) USD 5 billion spin-off to the public of Keysight Technologies Inc. (NYSE:KEYS);

  • Ingersoll Rand Plc's USD 4.9 billion disposition of its Bobcat utility equipment and attachments division to Doosan Corporation.

Professional Associations and Memberships

  • New York State Bar Association
  • American Bar Association
  • District of Columbia Bar
  • International Fiscal Association
  • Florida Bar


  • New York~United States (2002)
  • District of Columbia~United States (1990)
  • U.S. Tax Court~United States (1990)
  • Florida~United States (1987)


  • University of Florida (LL.M. Taxation) (1988)
  • Stetson University (J.D.) (1986)
  • University of Florida (B.A. English) (1984)


  • English
  • French

Previous Offices

  • Paris
  • Washington, DC
  • Author, Treasury and IRS Release Voluminous Section 163(j) Regulations, Tax News & Developments (Baker & McKenzie NATPG), Client Alert, 14 February 2019

  • Author, Proposed Regulations Under Section 965, Tax News & Developments (Baker & McKenzie NATPG), Client Alert, 24 August 2018

  • Author, TCJA Raises New Opportunities and Traps for M&A Deals, Tax News & Developments (Baker & McKenzie NATPG), Volume XVIII, Issue 1, February 2018

  • Author, IRS Issues Final Regulations on Transactions Qualifying as Tax-Free “F” Reorganizations, Tax News & Developments (Baker & McKenzie NATPG), Volume XV-6, December 2015

  • Author, IRS Clarifies Treatment Of "Drop and D" Transactions, Tax News & Developments (Baker & McKenzie NATPG), Volume XV-3, June 2015