Kenneth B. Clark

Chair, Tax Litigation

Partner, Tax  

Mountain View 650.335.7215


Kenneth Clark is a partner in the Tax Group of Fenwick & West and has served as Chair of its Tax Controversy Practice since its formation. Fenwick has received numerous accolades for its tax controversy practice, including recognition by International Tax Review as the top controversy practice in North America and as U.S. tax litigation firm of the year in several different years. The principal focus of Kenneth’s practice is complex federal tax litigation and tax controversy work, particularly involving international matters. He regularly practices in the U.S. Tax Court and has published a number of articles relating to tax controversies. Fenwick has worked on more than 75 federal tax litigations.

Kenneth has worked on numerous high profile tax controversy matters, for clients such as Xilinx, The Limited, L Brands, Textron, Chrysler AG, G.M. Trading, Dover Corporation, Adaptec, Analog Devices, Sanofi SA, Cameco and CBS. A number of these matters have resulted in important reported decisions.

With four decades of experience, Kenneth also has managed a variety of complex tax disputes in the U.S. and in a number of foreign countries. He is included in International Tax Review’s World’s Controversy Leaders and Euromoney’s World’s Leading Transfer Pricing Advisors. Litigation prevention and alternative dispute resolution have been important parts of his practice; he has served as Fenwick’s ADR coordinator, been an AAA arbitrator, and been involved in numerous mediations and arbitrations.

Kenneth has extensive experience in teaching speaking techniques.​​​​