Law Firm

Oyat avocats Paris
Oyat avocats Paris
Oyat avocats Paris

Oyat, your business partner that puts collective intelligence at the heart of your projects.

Oyat is not just another
law firm in Paris.

Thanks to our talent pool, we know how to anticipate difficulties and advise on the most strategic projects.

Knowledge & know-how

We have chosen our areas of expertise and our strength
is to master them to better assist you.

Oyat works alongside technical and financial experts as well as lawyers in France and abroad, mainly in labor law, tax law and competition law, to provide our clients with concrete and tailor-made solutions.

Skills & know-how

We are women and men of conviction, and we address
the challenges ahead by your side.
Legal counsels
Betty Baalouchi
Office Manager
Ouisse Weiss Akhonzada
Louis Grohard
Romain Chinchole
Anas Benlarbi
Legal Counsel
Romane Rage
Elsa Lob
Claire Manouvriez
Myriam Gal
Émilie de Boussiers
Sabrina Qureshi
Charles-Henri Laval
Legal Counsel
Arnaud Marroni
Camille Guyot
Clyde Coutellier
Laura Dufresne
Charlotte Barraco-David
Guillaume Ledoux
Laurent de la Brosse
Founding Partner
Romain Canot
Marie-Hélène Tonnelier
Founding Partner
Caroline Basdevant-Soulié
Founding Partner

From our side to yours

At Oyat, we share our understanding of the world to ensure your success.
Oyat newsletters
Press release
  • 29.06.2023 - Deals, Press release

    Oyat advises Nomios in the framework of the exclusive negotiations between IK Partners and Keensight Capital for the sale of Nomios

  • 22.06.2023 - Awards

    Marie-Hélène Tonnellier and Laurent de la Brosse are ranked in Best Lawyers 2024

  • 20.04.2023 - Awards

    Oyat has been recognized by the Palmarès des meilleurs cabinets d’avocats en France 2023, published by the magazine Le Point

  • 14.04.2023 - Awards

    Oyat is ranked in all its practices by the Legal 500 EMEA 2023

  • 06.04.2023 - Publications

    Cyber insurance: the French legal framework is changing

  • 01.04.2023

    Oyat advises Cenexi’s management on its acquisition by India’s Gland Pharma

  • 24.03.2023 - Awards

    Marie-Hélène Tonnellier is ranked in the 2023 Chambers Guide

  • 09.02.2023 - Publications

    The French doctrine on the use of the cloud

  • 24.01.2023 - Press release

    Oyat celebrates its first anniversary!

  • 27.12.2022 - Awards

    Oyat has been distinguished in the Leaders League 2022 rankings

  • 15.11.2022 - Press release

    Oyat appoints two Counsels: Laura Dufresne and Émilie de Boussiers

  • 20.10.2022 - Oyat newsletters

    Useful reminder to inventors

  • 01.10.2022 - Deals, Press release

    Oyat advised the managers of Activate Solutions Group Ltd on the sale of the group

  • 22.09.2022 - Awards

    Laurent de la Brosse has been recognised as a Notable Practitioner by IFLR 1000 2022 in «Project development, Real estate acquisitions»

  • Création Oyat avocats Paris
    21.09.2022 - Press release

    Oyat’s DNA in a few words, 9 months after the creation of the firm

  • 01.09.2022 - Deals, Press release

    Oyat advises Arcadis on its acquisition by DI Environnement

  • 23.06.2022 - Awards

    Marie-Hélène Tonnellier and Laurent de la Brosse are ranked in Best Lawyers 2023

  • 13.06.2022 - Events

    Marie-Hélène Tonnellier, speaker at the next IFCLA Conference, at Helsinki

  • 02.06.2022 - Oyat newsletters

    Carve out: a summary of the main objectives and interests attached to this transaction

  • 26.05.2022 - Events

    Marie-Hélène Tonnellier shall be speaker at the next Inifa conference in Paris

  • 22.04.2022 - Awards

    Oyat is ranked in the latest edition of Legal500 Paris in the “Firms to watch” category.

  • Création Oyat avocats Paris
    11.04.2022 - Press release

    Driven by an entrepreneurial passion, Oyat is an independent and pioneer law firm, and launches its visual identity and its website

  • Oyat avocats Paris - Marie-Hélène Tonnellier, Chambers 2022
    01.04.2022 - Awards

    Marie-Hélène Tonnellier is ranked in the TMT Information Technology Chambers Guide 2022

  • Oyat avocats - Cycle up
    10.03.2022 - Deals

    Oyat advises Cycle Up, Icade and Egis on the entry of 3 new shareholders : Banque des Territoires, Acorus and Groupe SMA

  • Oyat avocats - Isatis
    05.03.2022 - Deals

    OYAT advises Isatis Capital on the sale of its shares of Foederis to Group Septeo

  • Brève Oyat avocats Paris
    24.02.2022 - Oyat newsletters

    Focus on the new Guidelines on State aid for climate, environmental protection and energy

  • Brève Oyat avocats Paris
    10.02.2022 - Oyat newsletters

    Corporate Venture, what is it ?

  • Création Oyat avocats Paris
    25.01.2022 - Press release

    Creation of Oyat law firm

From your side to ours

You are convinced that “we” is stronger than “I”?
Your success will be at the center of our concerns


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