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  • J.D., The George Washington University Law School, 1990
  • B.A., American University, 1987

Bar and Court Admissions

  • District of Columbia
  • Maryland

Other Professional Affiliations

Member, District of Columbia Bar Association

Member, Maryland Bar Association

Member, U.S. Council for International Business

J. Clark Armitage

Member, Washington, D.C.
(202) 862-5078 | v-card | PDF

J. Clark Armitage, an experienced lawyer in the transfer pricing sector, joined Caplin & Drysdale as a Member in 2013.  He was named President of the Firm in October 2018.

Mr. Armitage's core practice is advising multinational corporations on transfer pricing in all contexts, from planning to cross-border dispute resolution.  He has a particularly strong background interacting with tax authorities on advance pricing agreements (APAs) and Competent Authority matters for corporations in a wide range of industries. 

Mr. Armitage spent eight years in the IRS Advance Pricing Agreement Program, serving as Deputy Director from 2008 to 2010, where he both experienced and oversaw the full spectrum of Program activities.  He also served on a special detail as the Tax Treaty Manager responsible for Canadian Competent Authority cases. 

Drawing on his combined background in government and private practice, Mr. Armitage plays a key role in helping clients address transfer pricing, valuation, permanent establishment, and other international tax issues and controversies.


During his eight years with the IRS APA Program, Mr. Armitage served as team leader, branch chief, and industry coordinator for three separate groups, as well as Deputy Director.  In these roles, he experienced virtually all aspects of the Program's activities.  Mr. Armitage led numerous IRS Teams — including, economists, auditors, division counsel representatives, and Competent Authority analysts — in the development, negotiation, and conclusion of APAs.  As a frontline supervisor, he reviewed APAs developed by other IRS teams and coordinated development of cases in the industry coordination groups for Financial Products, Pharmaceuticals and Medical Devices, and Auto and Auto Parts.  Additionally, Mr. Armitage had Program-wide responsibility for reviewing cases, coordinating technical issues with other branches of the Office of the Associate Chief Counsel (International), and helping ensure that substantive and procedural issues were addressed consistently across the Program.

Mr. Armitage's contributions to the APA Program were bolstered by his detail as a manager for the U.S. Competent Authority's Office of Tax Treaty where he was responsible for supervising and reviewing Competent Authority analysts with responsibility for Canadian cases.  In 2008, he was the APA Program's representative to the IRS Transfer Pricing Task Force, which brought together officials from across the IRS with responsibility for transfer pricing enforcement.  The Task Force made recommendations that resulted in substantial new hiring of international examiners, the creation of a specialty group of international examiners focused exclusively on transfer pricing, and the formation of a Transfer Pricing Council to coordinate transfer pricing issues across the IRS.

Before joining the APA Program, Mr. Armitage was senior vice president for a venture capital fund management company, and served in London on the U.S. Tax Desk of a major accounting firm.  He also has worked with several leading law firms.

Awards & Rankings

  • The Legal 500, Recommended, 2014-Present
  • The Legal 500, Top-Tier Firm, Tax - US Taxes - Contentious, 2014-Present
  • The Legal 500, International Tax Team of the Year, 2014 and 2015
  • Best Lawyers in America, 2019-Present
  • Acquisition International, Best for International Transfer Pricing Issues - Washington, D.C., 2015

Recent News

Click here for a full list of media coverage.

Recent Speaking Engagements

An avid lecturer on the topic of transfer pricing, Mr. Armitage speaks before professional associations and at conferences. He formerly taught “Introduction to Transfer Pricing” as an adjunct professor for the Georgetown University Law Center. Recent engagements include:

  • Speaker, Global Perspectives on Transfer Pricing Issues: China, India, and LATAM, ITR Global Transfer Pricing Forum - Europe 2019, September 26, 2019
  • Panelist, Impact of U.S. Tax Reform on Transfer Pricing - The Industry View, AICPA & CIMA U.S. Tax Update Conference, September 23, 2019
  • Moderator, Structuring to Address the Base Erosion and Anti-Abuse Tax, AICPA & CIMA U.S. Tax Update Conference, September 23, 2019
  • Speaker, Recent International Tax Developments in TCJA, 34th Annual Spring Corporate Tax Day, CBIT Education, Inc., June 24, 2019
  • Panelist, Transfer Pricing and International Tax: Post TCJA and BEPS, Pacific Rim Tax Conference 2019, Pacific Tax Policy Institute, May 10, 2019
  • Chair, Competent Authority, 6th Annual University of San Diego Transfer Pricing Symposium, May 9, 2019
  • Panelist, Practical APA Experiences: When, Where & Why?, TP Minds Americas, February 26, 2019
  • Moderator, International Tax Workshop, TP Minds Americas, February 25, 2019
  • Panelist, Transfer Pricing – A Strategic Planning Imperative Under New U.S. Tax Law, Bloomberg Tax Leadership Forum, November 29, 2018
  • Panelist, Dispute Resolution: Case Studies, IICJ Conference, October 16, 2018
  • Speaker, Approaching Tax Controversy and Audits Under U.S. Tax Reform, AICPA & CIMA U.S. Tax Reform Conference, September 17, 2018
  • Moderator, International Implications for Cross-Border Business, AICPA & CIMA U.S. Tax Reform Conference, September 17, 2018
  • Speaker, Present International U.S. Tax Reform Topics: BEAT, GILTI and FDII, International Monetary Fund, Tax Policy Group, May 23, 2018
  • Speaker, Impact of Tax Reform on Puerto Rico, Act 20/22 Society, May 4, 2018
  • Speaker, Brave New World of International Taxation: GILTI, BEAT, and Section 965, 33rd Annual Spring Tax Day of the Committee of Banking Institutions on Taxation, April 23, 2018
  • Speaker, The Recent IRS APMA Report, American Bar Association, Section of Taxation, Administrative Practice Committee, April 18, 2018
  • Moderator, The APA Landscape: How APAs Are Affected by "Eaton" and U.S. Tax Reform, TP Minds Americas, February 20, 2018
  • Speaker, Workshop B - Advanced TP Dispute Resolution Strategies, TP Minds Americas, February 19, 2018
  • Speaker, Implications of the 2017 Tax Act: International, Bloomberg Tax, January 23, 2018
  • Speaker, Transfer Pricing Disputes: The Successes and Failures of New Strategies, 5th Annual International Tax Enforcement and Controversy Conference, October 27, 2017
  • Panelist, Tax Reform Workshop, National Association for Business Economics, 7th Annual NABE Transfer Pricing Symposium, July 18, 2017
  • Panelist, Dealing Effectively with Disputes: When they happen (Part II), OECD International Tax Conference, June 6, 2017
  • Moderator, DBCFT: The End of Transfer Pricing As We Know It?, University of San Diego School of Law, 5th Annual USD Transfer Pricing Symposium, April 27, 2017
  • Panelist, Transfer Pricing Controversies, ABA Section of Taxation, IBA Taxes Committee, and IFA–USA Branch, April 6, 2017
  • Speaker, Tax Reform's Impact, Private Audience of Small Business Owners, March 10, 2017
  • Speaker, Workshop D - Successfully Using APAs: Maximizing Opportunities & Avoiding Pitfalls, TP Minds Americas, February 23, 2017
  • Moderator, TP Disputes & ADR Opportunities - Advice from the Front Line, TP Minds Americas, February 22, 2017
  • Panelist, Transfer Pricing Litigation Through the Lens of Medtronic, ABA Tax Section, January 19, 2017
  • Lecturer, Transfer Pricing, University of Michigan Law School, October 13, 2016
  • Speaker, Functional Analysis versus Value Chain Analysis (DEMPE), National Association for Business Economics, 6th Annual NABE Transfer Pricing Symposium, July 20, 2016
  • Panelist, Analysis of the Master/Local Files (Action 13), Tax Executives Institute Inc., 2016 U.S. International Tax Seminar - BEPS is Now, April 29, 2016
  • Moderator, New U.S. Developments: Regulations, Revenue Procedures, Cases and Guidelines, University of San Diego School of Law, 4th Annual USD Transfer Pricing Symposium, April 28, 2016
  • Panelist, Using APAs to Mitigate Risk and Disputes in the Age of BEPS, TP Minds Americas, February 23, 2016
  • Panelist, Transfer Pricing and the MAP Process—Hot Issues, The National Foreign Trade Council, October 22, 2015
  • Transfer Pricing Update: Discussion of Recent Issues and Guidance on Transfer Pricing, American Petroleum Institute, 81st Annual Federal Tax Forum, April 28, 2015
  • Moderator, Current TP Litigation: A Presentation – drawing from notable Transfer Pricing court cases of alternative perspectives of the IRS, the taxpayer, and the judge with the panel members undertaking alternating roles, University of San Diego, 3rd Annual Transfer Pricing Symposium, April 23, 2015
  • Speaker, TP Controversy & Alternative Dispute Resolution in the Age of BEPS, TP Minds Americas, 2015 Transfer Pricing Summit, February 25, 2015
  • Speaker, How the IRS Is Managing Its New Audit Responsibilities: Real-world Experience with the Transfer Pricing Audit Roadmap, the IDR Directive, and New Appeals Guidelines, TP Minds Americas, 2015 Transfer Pricing Summit, February 23, 2015
  • Speaker, Transfer Pricing and BEPS, Financial Executives International (FEI), Committee on Taxation Meeting, February 20, 2015
  • Panelist, Cross Border Transactions - Transfers of Intangible Property, George Washington University Law School and the Internal Revenue Service, 27th Annual Institute on Current Issues in International Taxation, December 11, 2014
  • Speaker, The Correct Transfer Pricing Principle: Whether BEPS Can Adequately Be Addressed Using the Arm's Length Principle, Georgetown University Law Center, Transfer Pricing Symposium, November 6, 2014
  • Speaker, APAs and MAPs, Duke University, Transfer Pricing: Policy and Practice, September 18, 2014
  • Panelist, Joint Current International Developments Panel - Part II, American Bar Association, 2014 May Meeting, May 9, 2014
  • Speaker, OECD BEPS Update, 80th Annual API Federal Tax Forum, April 28, 2014
  • Speaker, The New IRS Advance Pricing and Mutual Agreement (APMA) Program for Transfer Pricing: Progress in Case Management and Resolution, University of Maryland, Robert H. Smith School of Business, International Taxation and Transfer Pricing Program, March 27, 2014
  • Moderator, Intangible Property Controversy Trends, University of San Diego 2nd Annual Transfer Pricing Symposium 2014, March 27, 2014
  • Moderator, Negotiating & Successfully Implementing APAs – Practical Experiences, TP Minds Americas Transfer Pricing Summit 2014, February 19, 2014
  • Moderator, Using APAs and MAP to Mitigate Risk and Disputes, TP Minds Americas Transfer Pricing Summit 2014, February 18, 2014
  • Speaker, China and India Transfer Pricing Developments, District of Columbia Bar Association, May 1, 2013
  • Speaker, Transfer Pricing in Other Countries, U.S. International Tax Networking Seminar, March 1, 2013
  • Speaker, Final Cost Sharing Regulations, District of Columbia Bar Association, February 1, 2012
  • Speaker, Enforcement Update: The IRS Sharpens its Focus on Transfer Pricing, District of Columbia Bar Association, September 1, 2011
  • Speaker, APA Rev. Proc. 2008-31: Lessons Learned About Transfer Pricing Outside of Section 482, Tax Management Advisory Board Meeting, August 1, 2011
  • Speaker, Controversy and Dispute Resolution Update, PwC's Transfer Pricing Masters Series for Financial Services Professionals, April 1, 2010
  • Speaker, Transfer Pricing and APA Process, IRS IE Teams 1136 and 1507 Training/Meeting, March 1, 2010
  • Speaker, Competent Authority, 2009 CRA International and Large Business Directorate National Learning Event, November 1, 2009
  • Speaker, The APA Program and U.S. Competent Authority, IRS IE CENTRA Training, July 1, 2009

Click here for a full list of speaking engagements.

Recent Publications

Click here for a full list of publications.