Arnaud de Barthès de Montfort



With more than 35 years experience, Arnaud is a renowned expert in business litigation.

Arnaud deals with complex litigation matters concerning corporate law (post-acquisition, shareholder’s disputes), financial law, commercial law and civil liability.

He also has an extensive knowledge of white-collar criminal law in the context of disputes relating to managers’ liability (misappropriation of company assets, breach of trust) and companies’ liability (market abuse, bribery, favoritism).

He represents French and foreign companies in various sectors, notably, investment funds, banks and financial institutions, industrial companies, companies operating in the media industry, transport, energy, as well as telecommunications and new technology.

Arnaud began his career at Bredin Prat law firm before setting up his own law firm located in Paris and Marseilles. He was then partner at De Gaulle Fleurance & Associés where he led the litigation and arbitration group. Following this, Arnaud was partner of a Parisian law firm before creating Artemont.


  • Sciences Po Paris (Institute of Political Science), Economy and Finance, (1976)
  • Master’s degree in business law, University Paris I Panthéon-Sorbonne (1976)
  • Master’s degree in civil law, University Paris I Panthéon-Sorbonne (1978)


  • French
  • English


  • Guide Legal 500 (éd. Paris et EMEA)
  • Option Droit & Affaires (Special Issue - Litigation)
  • Décideurs Magazine / Leaders League (Guide 2016 « Litigation & Arbitration »)
Relentless litigator with a vivid imagination whilst still being pragmatic and realistic
Recommended for his outstanding qualities as a litigator

(Revue Legal 500, éd. 2017/18)
A great litigation lawyer, very experienced, who can build an argument focused on key issues and look beyond the technical details

(Revue Legal 500, 2016/17 ed.)
An excellent knowledge of all aspects of civil and criminal proceedings

(Revue Legal 500, 2015/2016 ed.)
Formidable lawyer, and a tenacious and creative individual

(Revue Legal 500, 2014/15 ed.)