Legal 500 EMEA 2022

In its 2022 edition, The Legal 500 Europe, Middle East and Africa (EMEA) recognised again our firm among the leading Luxembourg law firms for our achievements across the EMEA region. Our lawyers are also individually recommended in several practice areas.

This great achievement is the result of a team work and of the mutual efforts to provide our clients with a steadily high level of expertise across our practice areas.
We definitely share this success with our clients who praise us with a highly positive feedback.
Discover our rankings below:

KLEYR GRASSO > The Legal 500 Rankings

Luxembourg > Dispute resolution Tier 1

Litigation underpins much of KLEYR GRASSO’s work in Luxembourg, whether through formal proceedings or in a pre-litigation and risk management context. The size of the team, which includes four partners, ensures that it has the strength-in-depth to advise across a wide range of disputes, and to provide clients with a degree of individual partner specialisation. The ‘very strategic’ Marc Kleyr continues to handle a significant amount of high-profile litigation matters, alongside his duties as managing partner of the firm, and is appreciated for his ‘compassion’ and ‘outstanding perseverance’, including in complex shareholder disputes. ‘Fully aware of the procedural rules and recent Luxembourg case law’, in part due to her role as a member of the Luxembourg Bar Commission on civil procedure, Donata Grasso handles a range of complex domestic and cross-border disputes and is noted, in particular, for her ability ‘to analyse legal problems and to find practical solutions’ in relation to business disputes. Other recommended practitioners include Rosario Grasso, who combines ‘good judgement paired with professional aspiration’, for clients engaged in white-collar disputes; ‘top drawer litigatorPascal Sassel, ‘who really knows his stuff’ as it relates to financial services disputes; and François Collot, whose principal focus is on real estate and construction cases.

Leading individuals: Donata GrassoKLEYR GRASSO, Rosario GrassoKLEYR GRASSO, Marc KleyrKLEYR GRASSO, Pascal SasselKLEYR GRASSO

Next Generation Partners: François Collot – KLEYR GRASSO

Practice head(s): Marc Kleyr; Rosario Grasso; Donata Grasso; Pascal Sassel


‘The litigation team includes many talents who have an innovative approach to legal issues and who know how to offer its clients tailor-made solutions.’

‘Kleyr Grasso is an outstanding firm in Luxembourg. We have been using the firm for the last five years across a range of complex matters involving litigation and pre-litigation work. The firm delivered consistently great results for good value for money.’

Donata Grasso displays great attention to all the details of a case and has many years experience handling cross-border litigation. She is also able to analyse legal problems and to find practical solutions.’

Donata Grasso is fully aware of the procedural rules and recent Luxembourg case law.’

Rosario Grasso displays good judgement paired with professional aspiration.

Marc Kleyr thinks very strategically and understands the way the other party is thinking.’

Pascal Sassel is a top-drawer litigator who really knows his stuff.’

Key clients



SEO (Société Électrique de l’Our)

HITEC Luxembourg S.A.





Quantica Capital AG

BLRT Refonda Baltic


Luxembourg > Employment Tier 1

Headed by Christian Jungers,  KLEYR GRASSO‘s 17-strong team has the critical mass to be able to handle a tremendous volume and range of contentious and non-contentious matters for local and international employers, including advice on remuneration policies, as well as on large-scale redundancy procedures. Jungers has particular strength advising on collective bargaining/social plan negotiations and is also well-versed at advising on individual and collective terminations. Benefiting from ‘great knowledge of employment law, procedures and current litigation’, recently promoted partner Céline Defay is a popular choice among employers negotiating settlement agreements with outgoing employees, as well as defending claims of discrimination and unfair dismissal.

Leading individuals:  Christian JungersKLEYR GRASSO

Next Generation Partners : Céline Defay – KLEYR GRASSO

Practice head(s): Christian Jungers

Other key lawyers: Anissa Bali; Céline Defay; Philippe Ney; Sandra Rapp; Christophe Ney; Laura Woehrling; Daniel Nerl


‘A multilingual team, very reactive. We receive regular newsletters on what’s new in Luxembourg in terms of employment law.’

‘Very significant employment team which has a deep and practical knowledge of employment law.’

‘The team has a deep and practical knowledge of employment law. The lawyers provide practical legal advice and a commercial approach to employment law-related questions. Good market insights and always a good risk-based approach.’

Céline Defay knows and understands the business. Céline has a unique knowledge of the local laws and institutions. With her large experience, she’s an exceptional advisor.’

Céline Defay is very reactive, always available and has a great knowledge of employment law, procedures and current litigation. She always answers questions in a timely and precise manner.’

Daniel Nerl is responsive and provides high-quality advice.’

Sandra Rapp and Anissa Bali – very responsive and very proactive and always propose practical solutions.’

Key clients

G4S Luxembourg

Saint-Paul Luxembourg


Vodafone Procurement Company S.à r.l.



Luxembourg > Real estate and construction Tier 1

The ‘efficient and proactive‘ three-partner team at KLEYR GRASSO exhibits ‘flawless procedures‘ to private and public sector stakeholders across the full range of construction and real estate matters in a transactional setting, as well as in a standalone advisory and litigious context. François Collot has ‘deep knowledge‘ which manifests itself at the front end of transactional work, including on construction projects related to office space, as well as in construction/real estate disputes and in a public procurement context. As part of her broad contentious and non-contentious construction/real estate expertise, Yasmine Poos regularly provides advice on complex lease negotiation/drafting. Henry De Ron rounds out the team at a partner level and is particularly adept at handling construction disputes.

Leading individuals François Collot – KLEYR GRASSO, Yasmine PoosKLEYR GRASSO

Practice head(s): François Collot; Yasmine Poos; Henry De Ron

Other key lawyers: Fanny Mazeaud; Mélanie Trienbach


‘The team is extremely reactive! They work well together, the whole team has flawless procedures!’

‘The individuals are responsive, take time to listen, do an in-depth analysis of the cases and undertake detailed research.’

‘The team is efficient, proactive and qualified. We really appreciate the way they work and the way they deal with our cases.’

François Collot has deep knowledge and provides very appropriate advice on litigation and advisory matters.

Key clients

IKO Real Estate




LUX-Airport S.A.

Les jardins de Luxembourg

Thomas & Piron

Ministère de la Mobilité et des Travaux publics


Tracol Immobilier

Fonds de Kirchberg


CIT Blaton

Fonds du Logement

Luxembourg > Insurance Tier 2

KLEYR GRASSO provides ‘high levels of legal competence’ at handling insurance-related disputes and is noted for its willingness to seek out-of-court settlements for its clients, ‘if it is economically advisable to do so’. Henry De Ron heads the team alongside Rosario Grasso and is noted in particular for his aptitude at handling construction-related insurance disputes.

Practice head(s): Rosario Grasso; Henry De Ron


‘A very competent and multilingual team with high legal competence. They are also focused on finding an out-of-court solution if it is economically advisable for the client.’ 

Luxembourg > Commercial, corporate and M&A Tier 3

The ‘friendly, knowledgeable and responsive‘ team at KLEYR GRASSO receives referral work from international law firms, as well as instructions directly from regional funds and corporates to advise on both the buy and sell-side of transactions. The team continues to generate a significant flow of work for growth private equity firm TA Associates, including in the context of acquisitions in the IT sector. Delphine Tempé provides ‘an extremely diligent and thorough service’, in a transactional setting as well as in relation to corporate governance. Rina Breininger retired in June 2021.

Practice head(s): Jean-Paul Spang; Delphine Tempé; Jean-Philippe Drescher ; Renata Jokubauskaite

Other key lawyers: Jérôme Burel


‘The team is friendly, knowledgeable and responsive.’

Delphine Tempe is knowledgeable, always available, and does her best to serve her clients’ interests in a commonly acceptable manner.’

Delphine Tempe provides an extremely diligent and thorough service while also being practical. She cares about our business. In addition, she is very personable and great to work with on a personal level.’

Key clients

TA Associates

LuxProvide S.A.

Trois I, Investissements Industriels Internationaux S.A.

Samsonite International

IK Investment Partners

Luxembourg > Private equity Tier 3

Although it lacks the same degree of specialisation and focus as some of its peers in the market, KLEYR GRASSO handles a not inconsiderable volume of private equity and growth capital M&A-related work as a function of its broader corporate practice. The arrival from D.Law in March 2021 of corporate finance expert Jean-Philippe Drescher strengthens the team. Rina Breininger retired in July 2021.

Practice head(s): Jean-Paul Spang; Jean-Philippe Drescher; Delphine Tempé; Renata Jokubauskaite

Other key lawyers: Jeannette Vaude-Perrin; Jérôme Burel

Key clients

TA Associates

IK Investment Partners

Luxembourg > Banking, finance and capital markets Tier 4

Providing an ‘outstanding work’ product on both a legal as ‘well as a more strategic level’, KLEYR GRASSO provides a value added service to clients within the banking sector, from a pure finance perspective, as well as in relation to adjacent litigation, corporate and restructuring work. On the transactional side, particular areas of strength include asset, project and fund financing. Key practitioners include Jean-Paul Spang, who is appreciated for his ‘responsive work style’ and the ‘extremely ambitious’ Renata Jokubauskaite, whose wide-ranging finance knowledge includes niche expertise in the film and media sector.

Practice head(s): Renata Jokubauskaite; Jean-Paul Spang; Delphine Tempé; Pascal Sassel

Other key lawyers: Jérôme Burel


‘The team is a highly professional team that is responsive, transparent and more than a “simple” legal firm – they are a true partner supporting us in the long-term with hands-on practical advice on a legal level.’ 

‘The team is friendly, knowledgeable and responsive in order to assist clients on tight deadline.’

‘Kleyr Grasso has developed over the last few years quite a good expertise in the field of asset, project and fund finance and has built a loyal client base in this area.’

Jean-Paul Spang is Kleyr’s most visible finance lawyer with a wide-ranging expertise in project finance and responsive work style.’

Renata Jokubauskaite is extremely ambitious, organised, down-to-earth and really sound to work with.’

Delphine Tempe is very pleasant to work with. She is knowledgeable, always available, and does her best to serve her clients’ interests in a commonly acceptable manner.’

Key clients


TA Associates



Luxembourg > Investment funds Tier 4

KLEYR GRASSO is ‘exceptionally strong in being able to interpret, deliver and make comprehensible suggestions across investment fund requirements‘, particularly in the context of private equity and real estate-related strategies. Counsel Jeannette Vaude-Perrin exhibits ‘incisive knowledge and a solutions-based approach’ to clients across an array of regulated and unregulated structures and is a key member of the two-partner team that is headed by Jean-Paul Spang.

Next Generation Partners: Jeannette Vaude-Perrin – KLEYR GRASSO

Practice head(s):Jean-Paul Spang

Other key lawyers: Renata Jokubauskaite; Jeannette Vaude-Perrin


‘They are exceptionally strong in being able to interpret, deliver and make comprehensible suggestions across investment fund requirements, insights into the CSSF approach and AML.’

‘The team displays a high level of knowledge and a professional approach.’

Jeannette Vaude-Perrin has been exceptional. She has the strong combination of incisive knowledge and a solutions-based approach.’