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Keith E. Eggleton
Partner Emeritus
Keith Eggleton retired from Wilson Sonsini after a career of over 30 years at the firm. He litigated a wide variety of matters, including securities fraud, corporate governance disputes, government actions (SEC and DOJ), commercial disputes, consumer fraud, and false advertising claims. He also counseled public and private companies, boards of directors, and executives on corporate governance, disclosure, and compliance issues.
  • Litigation
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John L. Slafsky
Partner Emeritus
John Slafsky retired as partner at Wilson Sonsini in 2025.
  • Trademark and Advertising
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John Aguirre
Partner Emeritus
In 2026, John Aguirre retired as a partner in the employee benefits and compensation practice at Wilson Sonsini Goodrich & Rosati. His practice encompasses all aspects of employee benefits and executive compensation, including tax, the Employee Retirement Income Security Act (ERISA), and federal and state securities law. He also had significant experience in the employee benefits and executive compensation aspects of mergers, acquisitions, and spin-off transactions.
  • Employee Benefits and Compensation
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Barath R. Chari
Partner
San Francisco
Barath Chari is a partner at Wilson Sonsini Goodrich & Rosati. Barath represents technology companies at all stages of growth, from bootstrapped start-ups to leading global enterprises, in complex business transactions involving technology and intellectual property. He also has deep experience in assisting technology companies and their investors with mergers, acquisitions, divestitures, and financing matters. A Washington, D.C., transplant resident in the firm’s San Francisco office, Barath understands how the federal government transacts with technology companies, and helps technology companies sell products to federal government customers and collaborate with the federal government on research and development. He also leverages his pre-law experience as a software engineer to provide informed legal advice on technical topics such as open source software.
  • Technology Transactions
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James G. Clessuras
Partner
Washington, D.C.
James assists clients with transactions driven by use or acquisition of technology and IP rights.
  • Technology Transactions
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Lisa A. Davis
Senior Counsel
Palo Alto
Lisa Davis is senior counsel in the Palo Alto office of Wilson Sonsini Goodrich & Rosati, where she is a member of the antitrust practice and focuses on antitrust litigation and counseling. 
  • Antitrust and Competition
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Gary R. Greenstein
Partner
Washington, D.C.
Gary represents companies in transactions with record labels, music publishers, and program suppliers focusing on intellectual property, licensing, and commercial transactions.
  • Technology Transactions
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Caz Hashemi
Partner
Palo Alto
Caz is head of Wilson Sonsini’s litigation department and a member of the firm’s board of directors. He is nationally recognized as one of the top attorneys in his field of practice, regularly representing clients in high stakes securities litigation and government investigation matters. 
  • Litigation
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Tarek J. Helou
Partner
Washington, D.C.
Tarek represents companies in internal investigations and defends companies and individuals in significant and multi-jurisdictional government enforcement actions.
  • Litigation
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Tonia O. Klausner
Senior Pro Bono Counsel
New York
Tonia is an experienced litigator whose clients have included Amazon, Blackboard, Google, Mylan, Netflix, Salesforce, and Twitter.
  • Litigation
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Peter D. Mostow
Partner
Seattle
Peter represents renewable and other energy sector clients in transactional matters.
  • Energy and Climate Solutions
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Amy L. Simmerman
Partner
Wilmington, DE

Amy is a leader of Wilson Sonsini’s Delaware office and governance practice.

  • Corporate
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Recent Classes

Click here to access the MCLE / On Demand Learning site for full schedule.

General Practice  The California Consumer Privacy Act – Deeper Dive on Key Requirements and Compliance Considerations 
June 20, 2019 
Eddie Holman, Lydia Parnes
General Practice  The California Consumer Privacy Act – Cybersecurity Implications 
May 16, 2019
Allison Bender, Beth George
General Practice  The California Consumer Privacy Act – Overview and Key Requirements 
April 17, 2019
Chris Olsen, Lydia Parnes
Innovator's Edge Series  Session 1: Implementing an IP SOP within Your Company 
March 20, 2019
Jeffrey Seidel
Innovator's Edge Series  Session 2: Aligning Your Portfolio with Your Commercial Timeline 
March 20, 2019
Charles Andres

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