Mr Arthur Dethomas > Hogan Lovells (Paris) LLP > Paris, France > Lawyer Profile

Hogan Lovells (Paris) LLP
17 AVENUE MATIGNON
CS30027
75378 PARIS
France

Work Department

Litigation

Position

Partner

Career

Renowned for his experience in corporate, stock exchange, and financial litigation and in white-collar criminal law, Arthur Dethomas is a member of the Club des Juristes (a French legal think-tank). Arthur has developed a recognized competency in complex corporate cases before the French commercial courts and represents clients before courts as well as regulatory authorities. He has been involved on numerous internal investigations and has substantial experience representing clients in cross-border matters, including insider trading, financial fraud, and the Foreign Corrupt Practices Act.

Arthur is licensed in Paris and in New York. He began his career at an international commercial law firm, before joining an international business law firm where he was elected to the partnership in 2007. In 2013, he founded a highly renowned litigation boutique firm. He was appointed Premier Secrétaire de la Conférence of the Paris Bar in 2003.

Languages

English, French

Education

Master’s degree in Business Law, University of Paris X; LL.M., Washington College of Law (A.U.)

Lawyer Rankings

Paris > Résolution des litiges > Contentieux boursier

Hogan Lovells (Paris) LLP added Arthur Dethomas to the team in January 2020 when he joined from his own firm, now renamed Peltier Juvigny Marpeau & Associés, to launch the firm’s stock market litigation practice. He notably defends several investment funds facings AMF sanction proceedings in relation to insider dealing accusations.

Chez Hogan Lovells (Paris) LLP  ,  Arthur Dethomas possède une forte expérience des procédures AMF d’abus de marché. Il défend notamment des fonds d’investissement et des sociétés dans des enquêtes portant sur des délits d’initiés et des communications d’informations financières.

Paris > Résolution des litiges > Contentieux commercial et de droit des sociétés

Hogan Lovells (Paris) LLP a considérablement augmenté son volant d’affaires contentieuse en matière corporate et commerciale suite au recrutement d’  Arthur Dethomas à la fin 2019. Celui-ci est régulièrement mandaté par de grands fonds d’investissement pour traiter leurs litiges financiers à forts enjeux. Il s’est également vu confier la gestion d’un dossier très médiatique, faisant suite à la survenue d’un incendie dans un important centre de données. La pratique du cabinet est particulièrement reconnue dans les secteurs des nouvelles technologies et de la santé. L’équipe est notamment impliquée en défense dans la première class action intentée en France dans le domaine des data, et gère plusieurs litiges de place en matière de responsabilité des produits de santé.  Christine Gateau, Christelle Coslin et le counsel Charles-Henri Caron sont recommandés sur ces aspects.   Marine De Montecler et Pauline Faron ont été promues au rang de counsel en janvier 2022.

France > Dispute resolution: Stock market litigation

Hogan Lovells (Paris) LLP‘s Arthur Dethomas, the head of the practice, has extensive experience in stock market abuse AMF proceedings. He is notably defending investment funds and companies in insider dealing and financial information investigations and sanctions proceedings. Julien Martinet left the practice in February 2022.

France > Dispute resolution: Commercial litigation

Hogan Lovells (Paris) LLP has considerably strengthened its commercial and corporate caseload since Arthur Dethomas joined the firm at the end of 2019. Able to handle a mix of commercial, corporate and criminal law issues, Dethomas has notably been retained by leading investment funds to assist with high-stakes corporate disputes. He has also been entrusted with the management of a high-profile case following the occurring of a fire in a data center. Disputes in the IT and healthcare sectors are other areas of strength, with the practice handling France’s first data class action proof of its expertise in the former, while several high-stakes product liability disputes are a core part of the practice’s healthcare caseload. Christine Gateau, Christelle Coslin and counsel Charles-Henri Caron are the key contacts here. Marine De Montecler and Pauline Faron made counsel in January 2022.