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Assisting clients in transatlantic business and disputes, with a focus on Arbitration,  Litigation, Technology and Data Protection.

Polaris Law is led by Alexander Blumrosen, member of the Paris and New York Bars, who serves as an arbitrator and litigator in complex cross-border litigation.

The firm is dedicated to helping clients through their most challenging transactions and  disputes with the highest quality of legal services.

We are committed to forging long-term relationships with our clients, providing specialized attention, genuine insight and practical advice.



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  • Arbitrator appointments in ad hoc and institutional proceedings

  • Counsel to parties in arbitration and related proceedings

Independent Expert Appointments

  • Hague Evidence Commissioner

  • Privacy Monitor

  • Expert reports on French law and U.S. law in court litigation and arbitration

Cross-border Litigation


  • Commercial and criminal litigation

  • Enforcement of judgments and arbitration awards

  • French Blocking Statute matters and Hague Evidence Convention discovery

  • Asset-tracing and recovery

  • Criminal and regulatory compliance and investigations (FCPA, AFA)

  • Expert witness on French substantive and procedural law in U.S. courts

French and international law

Corporate and commercial law

  • Contracts

  • Joint ventures

  • Distribution

  • Intellectual Property licensing

  • Franchising



  • Data privacy (GDPR) compliance and disputes

  • Innovation IP development & licensing

  • Software and hardware licensing

  • Export/import controls (encryption)

  • Joint ventures

International law

  • Foreign sovereign immunity

  • Conflicts of law

Practice Areas


I am the founder of Polaris Law, a French law firm specialized in international litigation and arbitration of commercial disputes, and more generally helping clients do business in France.

I have devoted my career to facilitating and intermediating transatlantic business relations for corporate clients and sovereign entities, with a particular focus on technology, privacy, e-commerce, Intellectual property and international encryption régimes.

With more than 30 years of proven advocacy experience in the courts of France and the United States, and in arbitration tribunals around the world, I advise on all types of complex litigation and investigations, while interpreting for our foreign clients the law, procedure and culture of international litigation including:

  • Representing parties in litigation, including internal and regulatory investigations by foreign authorities

  • Appointments as sole or party-appointed arbitrator

  • Enforcement of foreign judgments and arbitral awards in France

  • Obtaining evidence through international judicial assistance treaties between France and the United States

  • Data protection compliance and monitoring (including in litigation and arbitration)

  • Expert consultations and testimony on French and US law and procedure in litigation and arbitration


Our attorneys and our extensive network of expert attorneys around the world (through the World Law Alliance) stand ready to assist our clients in their transatlantic business and litigation matters.


Alexander Blumrosen

Member of the Paris and New York Bars



The Team

The team led by Alexander Blumrosen is a diverse group of talented international attorneys that includes members of the Bars of Paris, Cameroon and Cairo


Alexander Blumrosen

Tel: +33 6 80 01 14 13

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Check out the latest contribution of Alexander Blumrosen and Polaris Law in the May-June edition no. 315 of Fusions & Acquisitions!

Check out the latest contribution of Alexander Blumrosen and Polaris Law in the May-June edition no. 315 of Fusions & Acquisitions, Éditions Dealflow-Data in collaboration with the ESCP Business School. This edition was under the governance of David Chekroun, Gilles Pillet, Marina Guérassimova.

Polaris Law is a member of the World Law Alliance

We are pleased to announce that Polaris Law is now member of World Law Alliance (WLA), representing Paris and WLA Europe.

Alexander Blumrosen recognised as a national leader in the 2021 Who's Who Legal

Alexander Blumrosen has been recognised as a National Thoughts Leader in this year's Who's Who Legal (WWL) in France in the Data chapter.
He has also been recognised as a Global Leader in the 2021 Data - Information Technology chapter.

Speaker at New York Arbitration Week

On 19 November 2020, Alexander Blumrosen took part in "Virtual Hot Tubbing - Panel-Appointed Experts: Arbitrators Debate, You Decide" hosted by Silicone Valley Arbitration and Mediation Center during New York Arbitration Week 2020, discussing the pros of tribunal appointed experts.

Creation of Polaris Law

We are pleased to announce the creation of Polaris Law, a French business law firm specialized in international arbitration, litigation and technology.

Alexander Blumrosen's chapter in GAR Guide to IP Arbitration, "Disclosure Issues in IP Arbitration"

Check out Alexander Blumrosen's chapter in the GAR Guide to IP Arbitration: "Disclosure Issues in IP Arbitration", out now!

Alexander Blumrosen tapped to join SVAMC Board of Directors

This February 2021, Alexander Blumrosen has been tapped to join the Silicon Valley Arbitration and Mediation Center (SVAMC) as a member of its Board of Directors.

Alexander Blumrosen renewed to SVAMC 2021 Tech List of Leading Neutrals

Alexander Blumrosen has been renewed to the highly renowned Silicon Valley Arbitration and Mediation Center 2021 "Tech List".

Launch of firm website

Polaris Law is now live!

News and Updates


4, avenue Hoche

75008 Paris


Office: +33 1 43 18 02 60


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