Marine Largant Collaboratrice
Avocate

Marine Largant

Collaboratrice
Avocate
+41 58 450 70 00
marine.largant@lenzstaehelin.com
Genève
Route de Chêne 30
CH-1211 Genève
www.lenzstaehelin.com
  • Expertise

    Marine Largant a rejoint Lenz & Staehelin en 2025 en tant que collaboratrice senior, après avoir travaillé pendant neuf ans au sein d’un Big Four et d’une étude d’avocats à Genève. Elle exerce au sein de notre bureau de Genève, où elle est spécialisée en droit commercial et des sociétés, ainsi qu’en protection des données. Elle conseille des associations et fondations, des entreprises, des PME ainsi que des banques dans ses domaines de compétence.

  • Domaines d’activité

  • Domaines de spécialisation

    Droit des contrats et droit commercial, Protection des données, Droit bancaire et financier
  • Expérience Professionnelle et Education

    et Education

    2025Collaboratrice, Lenz & Staehelin
    2019–25Collaboratrice, étude genevoise
    2016–19Juriste, département juridique d'une Big 4
    2012–15Avocate stagiaire et juriste, étude généraliste dans le canton de Fribourg
    2015Obtention du brevet d'avocat
    2012Université de Neuchâtel (Master en droit)
    2012Columbia Law School, New York (Programme d'échange)
    2010Université Toulouse I Capitole, France (Master droit de l'entreprise)
    2008–09Université de Wolverhampton, Angleterre (Erasmus)
  • Langues

    Français, Anglais, Espagnol
  • Affiliations

    Ordre des avocats de Genève (ODAGE)
  • Sélection de Publications

    • Largant M., Data Lakes: What are the key issues from a data protection perspective?, in: Jusletter, 24 Septembre 2024
    • Largant M., Fischer P., Comment obtenir une certification au Data Privacy Framework ?, in: Swissprivacy.law, 18 July 2023
    • Fischer P., Largant M., Health Data Hub, in: Jusletter 7 June 2021
    • Largant M., Fischer P., On Cloud Number Nine, un bref survol des enjeux juridiques et règlementaires du cloud banking, Swissprivacy.law 12 November 2020
  • Coordonnées

Analyses

Analyses 27.07.2026

Retrocessions in “execution only” relationships: the Swiss Supreme Court confirms its landmark ruling and applies it to remunerations related to in-house structured products

Retrocessions in “execution only” relationships: the Swiss Supreme Court…

<p class="MsoBodyText">In its rulings 4A_501/2025 and 4A_503/2025 of 17 June 2026, the Swiss Supreme Court confirmed and applied the principles established in its recent landmark ruling of 12 January 2026: Banks are not required to return to their clients retrocessions (or other forms of financial kick-backs) received in connection with “execution only” relationships, absent a concrete risk of a conflict of interest (which is generally absent in “execution only” relationships). This decision is of particular relevance for in-house structured products. The flows of remuneration linked to structured products are indeed expected to continue to be a focus point of the Swiss financial regulator FINMA going forward (see the recent FINMA Communication 03/2026). This Legal Insight refers principally to ruling 4A_501/2025, the two decisions being materially similar.</p>

Analyses 18.02.2026

Swiss Supreme Court clarifies the legal regime applicable to retrocessions in execution-only relationships

Swiss Supreme Court clarifies the legal regime applicable to retrocessions…

<p>In a landmark and long-awaited decision dated January 12, 2026 (4A_149/2025), the Swiss Supreme Court has ruled that banks <strong>are not</strong> required to credit to clients retrocessions received from third parties in execution-only relationships. This judgment brings to a close nearly two decades of legal uncertainty on the topic.</p>

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