Marine Largant Associate
Attorney at Law

Marine Largant
Associate
Attorney at Law
+41 58 450 70 00
marine.largant@lenzstaehelin.com 		Genf
Route de Chêne 30
CH-1211 Genf
www.lenzstaehelin.com

  • Expertise

    Marine Largant joined Lenz & Staehelin in 2025 as a senior associate after having worked at a Big 4 and a law firm in Geneva for 9 years. She is based in our Geneva office where she specialises in commercial and corporate matters, as well as data protection law. She advises associations and foundations, companies, small and medium size enterprises, as well as banks in her areas of expertise.

  • Fachgebiete

    Handels- und Vertragsrecht Datenschutz und Digitalisierung Banking and Finance Foundations and Philanthropy

  • Spezialgebiete

    Commercial and Contract, Data Protection and Privacy, Banking and Finance

  • Beruflicher Werdegang und Ausbildung

    und Ausbildung

    2025Associate, Lenz & Staehelin
    2019–25Associate, Geneva based law firm
    2016–19Assistant manager, legal department of a Big 4
    2012–15Trainee lawyer and legal officer, general practice law firm
    2015Swiss Bar admission
    2015University of Neuchâtel (Master in law)
    2012Columbia Law School, New York (Exchange Program)
    2010University of Toulouse I Capitole, France (Master in corporate law)
    2008–09University of Wolverhampton, England (Erasmus)

  • Sprachen

    Französisch, Englisch, Spanisch

  • Mitgliedschaften

    Geneva Bar Association (ODAGE)

  • Ausgewählte Publikationen

    • 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

  • Kontakt

    Genf marine.largant@lenzstaehelin.com
    V-Card Vollständiger CV

Publikationen

ALLE ANZEIGEN

Insights

Insights – 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>

Insights – 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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