Laurent Olléon

Zhen Huang is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation. Zhen, 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 Zhen is held by other top lawyers in the same geographic and legal practice area.

https://www.advant-altana.com/en/avocat/stephanie-negre

Elsa Rodrigues is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation. Elsa, 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 Elsa is held by other top lawyers in the same geographic and legal practice area.

Emmanuel Marsigny is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense. Emmanuel, who practices law in Paris, France, has been recognized since 2017. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Emmanuel is held by other top lawyers in the same geographic and legal practice area.

Yann Colin is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation and Litigation. Yann, who practices law in Paris, France, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Yann is held by other top lawyers in the same geographic and legal practice area.

Hélène Gelas advises on public law, environmental law, urban planning law and energy law, in the field of energy and real estate. She holds a doctorate in law and assists her clients, from large listed groups and investment funds to small and medium-sized French and international companies, with advice and litigation before the administrative courts and in all stages of projects, whether for major real estate development projects or for renewable energy projects (wind, photovolt...

With more than 15 years of experience appearing before U.S., E.U., and French regulators, Sara has consistently guided clients through the intricacies of domestic and cross-border regulatory matters. Her practice encompasses advisory services, implementation, investigations, and disputes—most notably in the financial services and banking, health care, technology and new media, and telecommunications sectors.

Marie Piot is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Marie, 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 Marie is held by other top lawyers in the same geographic and legal practice area.

French qualified lawyer specialised in Information Technology, Data Privacy and Intellectual Property. Fluent in English. Her career as a specialist intellectual property and information technology lawyer began in Paris in 2001, in a major international law firm. From there, she was subsequently posted to Shanghai, in the People's Republic of China, for 4 years.After this enriching international experience, she spent several years as a Partner in a French law firm specializing in IT, media an...

Mathieu LE TACON is co-head of the « Wealth law & taxation » department. He has developed recognized expertise in asset taxation and taxation of family-run companies : taxation of restructuring operations (mergers, transfers of all assets and liabilities, founding and activation of French and foreign holding companies, active or inactive) taxation of company transfers (LBOs, OBOs, etc.) organization and optimization of asset transfers (implementation of DUTREIL agreements, man...