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 >

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
13th 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

Dennis R. DeBroeck

Partner, Corporate  

Mountain View 650.335.7168



Dennis DeBroeck has worked in Silicon Valley for 40 years advising startups to public companies, as well as venture capitalists and investment bankers. His practice includes legal and business advice on startup issues, venture capital financings, mergers and acquisitions, public offerings, securities law matters, corporate governance and business transactions.

Dennis has been recognized as one of The Best Lawyers in America in corporate law, mergers and acquisitions and securities; as one of the leading corporate lawyers in the US West Coast by Euromoney magazine; as a Northern California Super Lawyer in securities and corporate finance and mergers and acquisitions by San Francisco magazine; and one of Silicon Valley’s Top Lawyers by San Jose Magazine.

Representative Experience:

Mergers and Acquisitions

  • Private company acquisitions by Shoretel, Silicon Image, Lexar Media, Adaptec and Niku 
  • RAE Systems going private 
  • Canesta’s acquisition by Microsoft 
  • Lexar Media’s $900 million acquisition by Micron 
  • Handspring’s acquisition by Palm 
  • Kintana’s $225 million acquisition by Mercury Interactive 
  • Unity Semiconductor’s acquisition by Rambus 
  • Radia’s acquisition by Texas Instruments 
  • Global Locate’s acquisition by Broadcom 
  • Spectrum Astro’s acquisition by General Dynamics 
  • GenOA’s acquisition by Finisar 
  • Emotient’s acquisition by Apple 
  • Data Domain’s $2.4 billon acquisition by EMC in a topping bid tender offer 
  • Excess Bandwidth’s $315 million acquisition by Virata 
  • Pure Atria’s $900 million acquisition by Rational Software 
  • Micron Electronics’ tender offer for Netframe and sale of its PC business to Gores and merger with Interland 
  • Integrated Device Technology’s acquisition of Quality Semiconductor 
  • Tekelec’s acquisition of IEX 
  • Pemstar’s acquisition of Pacific Consultants 
  • Wayfarer’s acquisition by Vantive 
  • Cloudscape’s acquisition by Informix 
  • Software Component Group’s acquisition by Integrated Systems

Public Offerings and Securities Law Experience:

  • Public offerings, convertible debt offerings and shelf registrations for such clients as: Data Domain, ShoreTel, Lexar Media, Handspring, Silicon Image, Adaptec, Integrated Device Technology, Niku, Hybrid Networks, ESS and other companies. 
  • Investment bankers in a variety of public offerings for software, semiconductor, semiconductor capital equipment and other companies including Alteon Websystems, OnTrak Systems, Rackable Systems, Catalyst Semiconductor, Integrated Device Technology, Sigma Designs and others. 
  • Advice on spinoffs, tracking stocks, going private and buyout transactions. 
  • Advice to more than 25 public companies and boards of directors on corporate governance, Sarbanes-Oxley, federal securities issues, mergers and acquisitions, unsolicited acquisitions proposal (including Mitel’s proposal to acquire Shoretel), activist shareholders, proxy contests and investigations.

Dennis served for a number of years on Fenwick & West’s Executive Committee and Compensation Committee. He also served as the head of the firm’s Corporate Practice Group. 

Prior to joining Fenwick & West, Dennis’ career focused on technology-based companies as a partner in a multinational law firm, founder of an entrepreneurial law firm and general counsel of a high-growth company. Dennis has served on the California State Bar Corporation’s Committee and given speeches on corporate governance, public offerings, venture capital, R&D partnerships and securities law matters. 

Dennis received his law degree from UCLA, where he graduated Order of the Coif and served on the UCLA Law Review. He attended the University of Colorado as an undergraduate where he received a Bachelor of Science in Business, with emphasis on Accounting and Finance. 

Dennis’ non-profit activities include serving as Vice Chairman of the Board of Directors of Peninsula Open Space Trust (“POST”) and as a member of Silicon Valley Social Venture Fund (“SV2”).