Guillaume Kuperfils
About Guillaume Kuperfils
Guillaume Kuperfils is a lawyer based in Paris, FR and has been recognized in The Best Lawyers in France™ since 2010. Guillaume Kuperfils is recognized in the following practice areas:
- Paris, France
- Corporate Law
- Mergers and Acquisitions Law
- Private Equity Law
Current Firm: Mayer Brown
Location: Paris, FR
Nearby Lawyers
Julie Beot-Rabiot is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Reorganization Law. Julie, who practices law in Paris, France, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Julie is held by other top lawyers in the same geographic and legal practice area.
After nearly twenty years’ experience as a tax lawyer with the Paris offices of Landwell (1995-2005) and August & Debouzy as of counsel, Alfred LORTAT-JACOB joined the Paris Office of Cornet Vincent Segurel as a tax partner in October 2010.Alfred LORTAT-JACOB holds a Master's degree in public finance and taxation from the University of Panthéon-Assas.He advises companies and company groups, French and foreign, as well as their managements on various areas of tax law (in parti...
Sandra Strittmatter is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law. Sandra, who practices law in Paris, France, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sandra is held by other top lawyers in the same geographic and legal practice area.
Caroline Ruiz Palmer is a top attorney recognized by Best Lawyers in the practice area(s) of Competition / Antitrust Law. Caroline Ruiz, who practices law in Paris, France, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Caroline Ruiz is held by other top lawyers in the same geographic and legal practice area.
Ségolène Coiffet is a top attorney recognized by Best Lawyers in the practice area(s) of Insolvency and Reorganization Law. Ségolène, who practices law in Paris, France, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ségolène is held by other top lawyers in the same geographic and legal practice area.
Géraldine Machinet is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Géraldine, who practices law in Paris, France, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Géraldine is held by other top lawyers in the same geographic and legal practice area.
Stéphanie Guedes da Costa focuses particularly on relations with employee representative bodies, professional elections, collective bargaining, as well as restructuring operations (including employee transfers, voluntary departure plans, and employment protection plans). She advises both French and international companies, providing support in both advisory and litigation matters (covering individual and collective issues). For many years, she has also assisted entities with mixed-stat...
2.1 Pull-out Statement/ Quote Antitrust and Regulatory lawyer Jean-Paul Tran Thiet brings experience and know-how to clients involved in competition-related proceedings or facing regulatory stakes. He is described as “ ‘An iron hand in a velvet glove’ when it comes to defending his clients’ interests ”. (Legal 500, EU Competition and Distribution (France) 2014) 2.2 Biographical overview As head of the EU Antitrust and Regulatory Practice at SophiaLex, Jean-Paul T...
Daouda Ba is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Daouda, who practices law in Paris, France, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daouda is held by other top lawyers in the same geographic and legal practice area.
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.