For more than four decades, Fenwick & West LLP has helped some of the world’s most recognized companies become, and remain, market leaders. From emerging enterprises to large public corporations, our clients are leaders in the technology, life sciences and cleantech sectors and are fundamentally changing the world through rapid innovation.  MORE >

Fenwick & West was founded in 1972 in the heart of Silicon Valley—before “Silicon Valley” existed—by four visionary lawyers who left a top-tier New York law firm to pursue their shared belief that technology would revolutionize the business world and to pioneer the legal work for those technological innovations. In order to be most effective, they decided they needed to move to a location close to primary research and technology development. These four attorneys opened their first office in downtown Palo Alto, and Fenwick became one of the first technology law firms in the world.  MORE >

From our founding in 1972, Fenwick has been committed to promoting diversity and inclusion both within our firm and throughout the legal profession. For almost four decades, the firm has actively promoted an open and inclusive work environment and committed significant resources towards improving our diversity efforts at every level.  MORE >

FLEX by Fenwick is the only service created by an AmLaw 100 firm that provides flexible and cost-effective solutions for interim in-house legal needs to high-growth companies.  MORE >

Fenwick & West handles significant cross-border legal and business issues for a wide range of technology and life sciences who operate internationally..  MORE >

At Fenwick, we are proud of our commitment to the community and to our culture of making a difference in the lives of individuals and organizations in the communities where we live and work. We recognize that providing legal services is not only an essential part of our professional responsibility, but also an excellent opportunity for our attorneys to gain valuable practical experience, learn new areas of the law and contribute to the community.  MORE >

Year after year, Fenwick & West is honored for excellence in the legal profession. Many of our attorneys are recognized as leaders in their respective fields, and our Corporate, Tax, Litigation and Intellectual Property Practice Groups consistently receive top national and international rankings, including:

  • Named Technology Group of the Year by Law360
  • Ranked #1 in the Americas for number of technology deals in 2015 by Mergermarket
  • Nearly 20 percent of Fenwick partners are ranked by Chambers
  • Consistently ranked among the top 10 law firms in the U.S. for diversity
  • Recognized as having top mentoring and pro bono programs by Euromoney


We take sustainability very seriously at Fenwick. Like many of our clients, we are adopting policies that reduce consumption and waste, and improve efficiency. By using technologies developed by a number of our cleantech clients, we are at the forefront of implementing sustainable policies and practices that minimize environmental impact. In fact, Fenwick has earned recognition in several areas as one of the top US law firms for implementing sustainable business practices.  MORE >

At Fenwick, we have a passion for excellence and innovation that mirrors our client base. Our firm is making revolutionary changes to the practice of law through substantial investments in proprietary technology tools and processes—allowing us to deliver best-in-class legal services more effectively.   MORE >

Mountain View Office
Silicon Valley Center
801 California Street
Mountain View, CA 94041

San Francisco Office
555 California Street
12th Floor
San Francisco, CA 94104

Seattle Office
1191 Second Avenue
10th Floor
Seattle, WA 98101

New York Office
1211 Avenue of the Americas
32nd Floor
New York, NY 10036

Shanghai Office
Unit 908, 9/F, Kerry Parkside Office
No. 1155 Fang Dian Road
Pudong New Area, Shanghai 201204
P.R. China
+86 21 8017 1200

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 LLP and chairs its Tax Litigation Practice. Fenwick has received numerous accolades for its tax controversy practice, including recognition by International Tax Review as U.S. tax litigation firm of the year in three different years. The principal focus of Ken’s practice is complex federal tax litigation and tax controversy work. He regularly practices in the United States Tax Court and has published a number of articles relating to tax controversies. Fenwick & West has worked on more than 70 federal tax litigations.

Ken has worked on numerous high profile tax controversy matters, for clients such as Xilinx, Inc.; The Limited, Inc.; Limited Brands, Inc.; Textron Inc.; Daimler AG; G.M. Trading; Dover Corporation; Adaptec, Inc.; Analog Devices; and CBS.

With four decades of experience, Ken also has managed a variety of complex commercial disputes in a number of foreign countries and more than twenty states. Litigation prevention and alternative dispute resolution (ADR) also have been important parts of his practice. He has served as Fenwick & West's ADR coordinator, as an American Arbitration Association arbitrator, and has been involved in numerous mediations and arbitrations.

Ken received a B.A. from the University of Redlands, where he graduated summa cum laude, and was first in his class. He received a J.D. from New York University School of Law, cum laude, and was a member of that school's Law Review. Ken also received an M.B.A. from the University of California at Berkeley. He has extensive experience in teaching speaking techniques.