Mr. K. Rutten


Managing Partner

Koen Rutten has worked for Wijn & Stael since 2006 and specialises in business law disputes. He is a persistent and passionate attorney with a wealth of experience as a business and financial litigator. He represents the interests of large businesses, shareholders and executive and supervisory directors in a range of disputes, including complex liability cases. Koen assists executive and supervisory directors in liability procedures, and he gives advice on issues surrounding corporate governance. He also acts in merger disputes, inquiry proceedings at the Enterprise Division of the Amsterdam Court of Appeal, and national and international arbitrations. As a financial litigator, Koen concentrates on the liability of financial institutions and supervisory authorities. In addition, he advises on and litigates cases concerning the Financial Supervision Act (Wft).

Looking after the interests of misled investors and conducting proceedings for class actions is one of Koen’s other focus areas. He is currently acting for a large number of investors who were duped by René van den Berg in proceedings against ABN AMRO. Koen is also representing a large group of shareholders of Ageas (formerly Fortis), together with the leading European consultancy firm Deminor, in proceedings before the Amsterdam Court of Appeal to declare a settlement of more than €1.2 billion binding, based on the Class Action (Financial Settlement) Act). In the past, Koen has successfully represented the accountholders of the bankrupt Van der Hoop Bankiers N.V., the subordinated deposit holders of DSB Bank, and, together with Deminor, the duped shareholders of Imtech.


  • Chambers 2020 - Up and Coming
    Dispute Resolution
    Cliënt feedback: "a real pleasure to work with," "highlighting his experience" and "very good strategic insight."
  • Chambers2019 - Up and Coming
    Dispute Resolution
    Cliënt feedback: "high technical knowledge." "good negotiator."
  • Chambers 2018 - Up and Coming
    Dispute Resolution
    Cliënt feedback: "effective and proactive throughout the entire process.' 'understands the commercial background of a case."
  • Legal 500 - 2020: Dispute resolution: Commercial Litigation
    Testamonial: "approachable and down to earth, open-minded while legally rigorous, and respected by his peers."


  • Permanent employee of the Tijdschrift voor de Ondernemingsrechtpraktijk (TOP) (magazine for corporate attorneys)
  • Active participant at Lawyers for Lawyers
  • Member of the Association of Corporate Litigation
  • Member of the Association of Securities Law
  • Member of the Association of Civil Law


  • Specialist course in Corporate Litigation, Grotius Academie
  • Dutch Law, University of Utrecht (2001)


Koen has registered the following principal (and secondary) legal practice areas in the Netherlands Bar’s register of legal practice areas (rechtsgebiedenregister):

  • Corporate law

Based on this registration, he is required to obtain ten training credits per calendar year in each registered principal legal practice area in accordance with the standards set by the Netherlands Bar.

Publications from Koen Rutten


On 1 January 2020, the Act on collective damages in class actions (Wet afwikkeling massaschade in collectieve actie) (Act) came into force. The Act makes it easier to litigate mass damages claims in t...

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Chronicle of class actions and settlements 2017

As was the case in previous years, in 2017 various aspects relating to the class action received considerable attention in the press, literature, and case law. The press not only remarked on “high p...

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