Department profile
KLEYR GRASSO

Dispute Resolution

Europe Guide 2026 : Luxembourg


KLEYR GRASSO

Rankings

About

Provided by KLEYR GRASSO

With over twenty-five years of experience, our Corporate and Finance Litigation team is a recognized leader in the field, renowned for its commitment to excellence.

Our litigation lawyers bring exceptional expertise to a range of complex local and cross-border matters, including corporate, finance, commercial law disputes, and investment funds litigation. We handle shareholders' disputes, share transfer litigation, audit negligence cases, directors' liabilities, and disputes between investment funds and their stakeholders. Additionally, we manage the enforcement of financial collateral and exequatur proceedings, as well as the recognition and enforcement of foreign court decisions and arbitration awards.

Our lawyers are skilled negotiators and procedural experts, adeptly guiding clients through all stages of litigation—from pre-litigation to court applications—ensuring high-quality legal representation. During enforcement, our team handles cross-border cases, including attachment and exequatur proceedings.

Frequently appointed as lead counsel or arbitrator in significant arbitrations, we are a trusted partner for resolving complex legal issues both in and out of court. We proudly represent a diverse clientele, including states, multinational companies, audit firms, banks, investment funds, and individual shareholders and directors, providing tailored strategic solutions for their litigation needs.

Clients (2)

  • Ikodomos Holding S.C.A. (IKO Real Estate Group)
  • Ernst & Young S.A.

Industries (2)

  • Corporates
  • Banking, Financial Institutions

Chambers Review

Provided by Chambers

Dispute Resolution - Luxembourg

Band 1

Band 1


What the Team is Known For

KLEYR GRASSO is a pre-eminent law firm, well known in the market for its focus on high profile dispute resolution, including arbitration proceedings and the enforcement of arbitral awards. It represents both public and private entities hailing from the energy, private equity and engineering sectors. The law firm is active in shareholder disputes, liquidation matters, post-transactional litigation and criminal cases. Furthermore, KLEYR GRASSO advises on professional negligence and product liability litigation.

Strengths

Provided by Chambers

  • At KLEYR GRASSO, I feel that I have the right people on my side. The team is very qualified and measured in its approach, guiding me wisely.

    Dispute Resolution respondentEurope
  • The KLEYR GRASSO team manages to be both proactive in anticipating procedural steps and reactive when sudden developments occur.

    Dispute Resolution respondentEurope

Notable Practitioners

Provided by Chambers

  • Eminent PractitionersMarc Kleyr
    Eminent PractitionersMarc Kleyr

    Marc Kleyr

    Managing partner Marc Kleyr has a strong focus on shareholder disputes and professional negligence actions. He is a popular choice among clients from the financial services and engineering industries.

    • Marc Kleyr combines deep experience with a bold, confident approach that inspires trust in complex litigation matters.

      Dispute Resolution respondentEurope
    • Marc Kleyr is a key member of our team. He has an outstanding command of our case and is fully committed to it.

      Dispute Resolution respondentEurope
  • Band 2Donata Grasso
    Band 2Donata Grasso

    Donata Grasso

    Donata Grasso's practice focuses on the financial industry, assisting clients with shareholder and investment fund disputes and liability claims. She is also active in the enforcement of arbitral awards.

    • It is always a pleasure to work with Donata Grasso. She has both strong expertise and a high level of technical skill.

      Dispute Resolution respondentEurope
    • Donata Grasso has very deep knowledge of Luxembourg national court proceedings and takes a very prudent approach.

      Dispute Resolution respondentEurope

Ranked Individuals at KLEYR GRASSO (2)

Luxembourg

Members

Provided by KLEYR GRASSO

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