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Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
Building bridges reaching new horizons
By your side, every step of the way. -
Leading expertise for 30 years
By your side, every step of the way.
Independent law firm
NEWS
ABOUT US
We have been an independent full-service business and litigation law firm serving international and domestic clients for 30 years in Luxembourg with the highest professional standards and entrepreneurial culture. Our teams of strongly committed partners and lawyers of different nationalities support local and international players throughout their projects from inception to implementation.
The multilingual lawyers advise local and multinational companies from all industry sectors, leading institutional investors, private equity houses, banks, investment funds, and numerous other businesses in corporate M&A, restructuring and insolvency, private equity, capital markets, banking and finance, investment funds, real estate and construction, social and employment, arbitration, litigation, insurance and reinsurance, and tax.
Our firm was founded in 1994. In our early years, we built substantial expertise in litigation and advisory services for local clients.
Over time, we expanded our focus to include international clients and cross-border businesses, providing comprehensive legal solutions across all areas of law.
We proudly advise a diverse clientele, including local and multinational companies across all industry sectors. Our client portfolio includes some of the world’s largest corporations, leading institutional investors, prestigious private equity houses, and various businesses and professionals.
We collaborate extensively with leading audit and tax firms, enhancing our ability to provide comprehensive solutions. Additionally, we regularly engage in cross-border cases with foreign magic circle and other firms, who recommend our legal services to their clients seeking expertise in the Luxembourg jurisdiction.
VALUES
We are often described by our clients as a friendly, proactive and responsive firm. At our core, we prioritize quality over quantity, ensuring that every interaction and service we provide meets the highest standards. We maintain a strong ambition to succeed, driven not only by our dedication to our clients but also by our own aspirations for excellence.
Quality
We uphold a steadfast commitment to quality in all our endeavors. This means delivering excellence in every service we provide, from legal advice and representation to client communication and satisfaction. Quality is embedded in our work ethic, ensuring that we consistently strive for the highest standards of professionalism, accuracy, and effectiveness. By prioritizing quality, we not only meet but exceed the expectations of our clients, fostering long-term trust and loyalty.
Ambition
We embrace ambition as a driving force behind our continued growth and success. Ambition fuels our pursuit of innovation, excellence, and continuous improvement, inspiring us to push boundaries, explore new opportunities, and overcome challenges. We are committed to ambitious goals that stretch our capabilities and propel us toward greater achievements. By cultivating a culture of ambition, we empower our team to reach new horizons of excellence and make a meaningful impact on the legal profession and beyond.
Independence
Independence is fundamental to our integrity and autonomy as a firm. We prioritize independence in decision-making, ensuring that our actions are guided by principles of impartiality, objectivity, and ethical conduct. We maintain independence from external influences to safeguard the interests of our clients and uphold the highest standards of professional integrity. By remaining independent, we preserve our freedom to act in the best interests of our clients, uphold the rule of law, and contribute positively to society.
In essence, these core values quality, ambition, and independence serve as the cornerstone of our firm's identity, guiding our actions, shaping our relationships, and driving our collective pursuit of excellence in the legal profession.
We take the time to thoroughly understand our clients' businesses and their specific needs. Our approach is characterized by providing legally sound and pragmatic solutions tailored to the unique requirements of each client.
Our commitment to client-centricity ensures that our solutions are not only comprehensive but also strategically aligned with the specific goals and circumstances of our clients.
While we maintain a strong international character, we have cultivated close working relationships with distinguished law firms worldwide that share our philosophy and standards of quality. Independence, in our context, also means the liberty to accept clients of all sizes and sectors, treating each with an equal level of commitment.
We deliberately chose to remain an independent, non-affiliated firm. Independence for us means the freedom to select the most competent law firm in each jurisdiction for complex cross-border transactions, ensuring the best outcomes for our clients.
EXPERTISE
KLEYR GRASSO is a leading independent Luxembourg law firm that is distinguished for offering a comprehensive range of services and extensive experience across diverse practice areas.
Our expertise and legal know-how have been meticulously cultivated over many years, encompassing proficiency in over 20 domains of expertise. We foster a collaborative environment across all areas, cultivating an ethic of client-first satisfaction in our team.
With our extensive and interconnected spread of industry and sectoral expertise, we are equipped to provide comprehensive legal advice and services to our clients.
At KLEYR GRASSO, we understand that the legal landscape is dynamic and industry-specific. We are certainly one of the Luxembourg law firms rendering the most full service.
Our dedicated team of legal professionals is committed to providing tailored solutions to meet the unique needs of clients across diverse sectors.
We achieve this through:
Industry Insight: Our team possesses in-depth knowledge of the intricacies of your sector, allowing us to anticipate challenges and proactively address your legal needs.
Customized Solutions: Recognizing that each industry has its nuances, our approach is to provide customized legal solutions that align with your business goals and industry regulations.
Collaborative Partnership: We believe in fostering a collaborative partnership with our clients. By understanding your industry context, we can better serve your legal requirements and contribute to your success.
Internationally, our strategic focus is to be an independent but leading Luxembourg law firm in the local legal market. We handle cross-border and multi-jurisdictional client matters in collaboration with high-profile correspondents and distinguished foreign law firms.
RECOGNITIONS
Recognition by top directories such as The Legal 500 and Chambers and Partners underscores our firm’s expertise and dedication to client satisfaction. These rankings, driven by valuable client feedback, reflect our unwavering commitment to service quality and market leadership.
For over two decades, we have proudly earned top-tier recognition, reinforcing our reputation as a trusted legal partner in Luxembourg. Client insights remain at the heart of these achievements, inspiring us to consistently deliver exceptional legal services across multiple practice areas.
Chambers and Partners_ Europe guide 2025 _ Rankings
KLEYR GRASSO is proud to be recognized once again by Chambers and Partners in its 2025 Europe guide for its exceptional legal expertise. Our ongoing position among the top law firms in Luxembourg across various practices underscores the quality of our work and the unwavering standards of excellence we uphold every day.
- Individual Recognitions:
Marc KLEYR – Eminent Practitioner in Dispute Resolution (18 years ranked)
Donata GRASSO – Band 2 in Dispute Resolution (14 years ranked)
Christian JUNGERS – Band 2 in Employment (18 years ranked)
Anissa BALI – Band 3 in Employment (1 year ranked)
Céline DEFAY – Band 3 in Employment (3 years ranked)
Yasmine POOS – Band 3 in Real Estate (11 years ranked)
Luc COURTOIS – Band 4 in Investment Funds (19 years ranked)
Pierre-Alexandre DEGEHET – Band 4 in Corporate/M&A (12 years ranked)
- Team Recognitions:
Dispute Resolution – Band 1 (18 years ranked)
Employment – Band 1 (14 years ranked)
Real Estate – Band 4 (16 years ranked)
Corporate/M&A – Band 4 (7 years ranked)
Chambers and Partners_ Global guide 2025 _ Rankings
KLEYR GRASSO is proud to be ranked in the Chambers Global Guide 2025 for our expertise in Corporate & M&A, Investment Funds, and our German Desk. This recognition underscores our strong international capabilities, deep industry knowledge, and commitment to delivering high-quality legal services across multiple practice areas.
KLEYR GRASSO has once again secured a Top-Tier ranking in the prestigious Legal500 EMEA 2025 for Luxembourg. This recognition underscores our firm’s dedication to excellence, client success, and legal expertise across our key practice areas.
Recognitions:
- Dispute resolution _ Tier 1
Leading partners: Marc KLEYR, Rosario GRASSO, Donata GRASSO
Recommended lawyers: Emilie WATY, Vincent ALLENO, Muriel Piquard
- Employment _ Tier 1
Leading partners: Christian Jungers
Next Generation Partners: Céline Defay
Recommended lawyers: Anissa Bali, Philippe Ney, Christophe Ney
- Real estate and construction _ Tier 1
Leading partners: François Collot, Yasmine Poos
Recommended lawyers: Henry De Ron, Fanny Mazeaud, Mélanie Trienbach
Recommended lawyers: Renata Jokubauskaite, Pierre-Alexandre Degehet, Delphine Tempe
- Commercial, corporate and M&A _ Tier 3
Leading partners: Pierre-Alexandre Degehet
Recommended lawyers: Jean-Paul Spang, Delphine Tempe, Renata Jokubauskaite, Jérôme Burel, Katia Bartholome
- Investment funds _ Tier 3
Recommended lawyers: Mevlüde-Aysun Tokbag, Luc Courtois, Garry Reuland, Fabian Frankus
- Private equity _ Tier 3
- Tax _ Tier 4
Recommended lawyers: Lionel Bonifazzi, Valeria Ercolini
We are deeply grateful for the outstanding feedback from our clients, recognizing the dedication and excellence of our legal team. Their appreciation highlights the exceptional work of our lawyers, many of whom have been individually recommended in the rankings.
RECOGNITIONS
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