Diana Doyle chairs the Chicago Tax Department, where her practice focuses on tax planning for multinational companies, with an emphasis on private and public company mergers and acquisitions.

She has advised domestic and international companies on such matters as structuring taxable and tax-free stock and asset acquisitions and dispositions, cross-border migrations, tax-free reorganizations and spin-offs, securities offerings, limited liability company agreements and partnership tax. Ms. Doyle also has significant experience with tax audits, administrative appeals and litigation.

Ms. Doyle serves as a member of and is a past chair of the planning committee for the University of Chicago Tax Conference and is a frequent speaker on a variety of tax topics, including the following recent presentations:

  • “Understanding and Applying Section 163(j)” at Tax Executives Institute’s 73rd Annual Conference (2018) (“The Graphic Guide to Section 163(j)” to be published in March/April 2019 edition of Tax Executive magazine)
  • “International Joint Venture Issues” at PLI’s Tax Planning for Domestic & Foreign Partnerships, LLCs, Joint Ventures & Other Strategic Alliances Conference (2018)
  • “Tax Issues in M&A Contracts” at PLI’s Tax Strategies for Corporate Acquisitions, Dispositions, Spin-Offs, Joint Ventures, Financings, Reorganizations & Restructurings Conference (2018)
  • “Back in Time: In Search of a Coherent Theory of Transactional Retroactivity” at the University of Chicago Federal Tax Conference (2016) (paper published in March 2017 edition of TAXES)

Chambers USA consistently ranks Ms. Doyle for her efforts in the Tax practice, including 2018 recognition as a leading lawyer, and The Legal 500 has recognized her for her work in the US Taxes: Non-Contentious practice. She chairs Latham’s Brexit Task Force and is a member of its global strategic Initiatives Committee. Ms. Doyle is a past board member of the Chicago-based Coalition of Women’s Initiatives in Law and a past Advisory Board member of Latham’s Women Enriching Business (WEB) initiative.


  • JD, University of Chicago Law School, 1996
  • BS, Northwestern University, 1988