Firm Profile > KLEYR GRASSO > Luxembourg, Luxembourg

7 rue des Primeurs
L-2361 Strassen

Luxembourg > Dispute resolution Tier 1

Recognised as a 'top litigation firm in Luxembourg', KLEYR GRASSO is able to direct significant resources to clients engaged across a wide range of litigation and arbitration, including as it relates to commercial, employment and real estate disputes. Clients appreciate the firm's 'deep knowledge of business litigation in Luxembourg with a cross-border aspect', as well as its 'knowledge of how the law is applied by the courts'. Managing partner Marc Kleyr is 'very reactive and professional' and remains central to the firm's litigation offering by virtue of the superb track record he has built up over the years handling complex corporate law and shareholder disputes, as well as in the defence of clients in audit negligence cases arising from cross-border insolvencies. Other recommended partners include the 'focused and proactiveDonata Grasso; white-collar crime defence expert Rosario Grasso, who has 'a lot of experience and knowledge of the local market'; Pascal Sassel, for financial services sector disputes; and François Collot, whose primary focus is on real estate and construction cases.

Practice head(s):

Marc Kleyr

Other key lawyers:

Rosario Grasso; Donata Grasso; Pascal Sassel; François Collot; Yasmine Poss; Henry De Ron


‘Very reactive and professional.’

‘Kleyr Grasso is a top litigation firm in Luxembourg. They are neither too small nor too large and are just the right size to be able to cover all relevant areas. You get a lot of partner time for your money, but there is also a highly capable team of associates. A great choice overall.’

‘The litigation team of Kleyr Grasso has a deep knowledge of business litigation in Luxembourg with a cross-border aspect.’

‘They know the law very well and how it is applied by the courts.’

‘They show a willingness to be close to the customer. Taking ownership of process to ease customer decision making.’

Marc Kleyr is very reactive and professional.’

‘Rosario Grasso is a top-rated practitioner with a lot of experience and knowledge of the local market.’

‘Donata Grasso is highly focused on the case and gives proactive advice.’

Key clients




Ernst & Young


Ikodomos Holding


Sources Rosport



Luxembourg > Employment Tier 1

The 'extremely knowledgeable' two-partner team at KLEYR GRASSO provides a 'solution-driven' service to local and international employers across a range of contentious and non-contentious matters, including advice on remuneration policies, as well as on large-scale redundancy procedures. 'Outstanding' team head Christian Jungers provides 'innovative and pragmatic solutions' that are tailored to the specific needs of the client, whether they be in the public or private sector, including on behalf of many financial services clients. Counsel Céline Defay provides 'useful and pragmatic advice' to clients seeking to negotiate settlement agreements with employees, as well as to respondents in unfair dismissal claims.

Practice head(s):

Christian Jungers

Other key lawyers:

Philippe Ney; Anissa Bali; Céline Defay; Sandra Rapp; Christophe Ney; Laure Woehrling


‘The team provides open-minded and solutions-focused advice.’

‘This practice is extremely knowledgeable, very good technically and at the same time is able to provide very practical advice which is adaptive of client needs.’

‘The team is very professional and responsive, the best employment lawyers in Luxembourg.’

‘The firm is very hands-on in the process and has provided good support and guidance. They are solution finders and try and avoid litigation as far as possible, as they understand the financial constraints of the client, although it is not afraid to approach the courts if need be.’

‘Christian Jungers is outstanding. I perceive him as someone who is able to put himself exactly in the shoes of the client and to understand what the important aspects are from a business perspective. Very efficient!’

‘Sandra Rapp is excellent, technically and commercially. She is also extremely responsive and committed to clients.’

Céline Defay provides useful and pragmatic advice.’

Key clients

Carmignac Gestion Luxembourg S.A.

Burger Brands Luxembourg S.A.

Adecco Luxembourg S.A.

Luxembourg > Real estate and construction Tier 1

The 'very knowledgeable' team at KLEYR GRASSO is well-versed at handling a broad range of transactional, advisory and litigation-related real estate and construction mandates. Praised for her 'in-depth technical knowledge of real estate law', Yasmine Poos is emblematic of the firm's balanced offering, and is as comfortable negotiating complex commercial property leases as she is representing clients in construction disputes. François Collot co-heads the team alongside Poos and is appreciated for his ability to provide 'pragmatic and precise advice' to local and international clients, including ArcelorMittal, which he recently assisted on the drafting of the construction contract relating to the construction of its new worldwide headquarters in Luxembourg-Kirchberg.

Practice head(s):

François Collot; Yasmine Poos

Other key lawyers:

Henry De Ron; Fanny Mazeaud; Mélanie Trienbach


The firm has an in-depth knowledge of construction law in Luxembourg.’

The team is very reactive and solutions-minded.’

We particularly appreciate Yasmine Poos’ sound advice, her pragmatic approach and her in-depth technical knowledge in real estate law.’

François Collot has a strong expertise in the Luxembourg real estate field and provides pragmatic and precise legal advice.’

Key clients

ArcelorMittal Luxembourg


Ministere des Finances



Lux Airport

Les Jardins de Luxembourg

Thomas & Piron

Ministère du Développement Durable et des Infrastructures


TRACOL Immobilier

C&A Luxembourg


Luxembourg > Commercial, corporate and M&A Tier 2

Praised for its 'excellent customer focus and business acumen', independent full-service firm 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 also provides counsel to listed and non-listed companies on general corporate and commercial matters, including corporate governance issues. Key team members include Rina Breininger, who continues to provide regular advice to leading growth private equity fund TA Associates on its downstream investment activity, and the 'assertive and creativeRenata Jokubauskaite, who is an 'an expert in finding simple solutions for complex matters'.

Practice head(s):

Rina Breininger; Jean-Paul Spang; Delphine Tempé; Renata Jokubauskaite

Other key lawyers:

Jérôme Burel


‘The team displays excellent customer focus and business acumen and provides a reliable service.’ 

The excellent Renata Jokubauskaite is assertive and very creative. She is an expert in financing transactions and M&A. She is also an expert in finding simple solutions for complex matters.’

Key clients

TA Associates

Lecta Group

JTC Group



Luxembourg > Insurance Tier 2

Although KLEYR GRASSO was undoubtedly weakened by the departure of its leading insurance practitioner Karine Vilret to Wildgen at the end of 2018, the firm remains reasonably active in the sector, on the litigation front in particular. Henry De Ron is the main contact.

Practice head(s):

Rina Breininger; Rosario Grasso; François Collot; Henry De Ron

Luxembourg > Private equity Tier 3

The 'knowledgeable and professional' team at KLEYR GRASSO has broad transactional expertise, which includes a not insignificant amount of financial sponsor-led work, often on behalf of core client, TA Associates. Rina Breininger is the primary contact.

Practice head(s):

Rina Breininger; Jean-Paul Spang; Delphine Tempe; Renata Jokubauskaite


Kleyr Grasso is knowledgeable and professional.’

Accessibility and personal on-hand involvement definitely sets Kleyr Grasso apart from the numerous other law firms we deal with.’

Key clients

TA Associates

Luxembourg > Banking, finance and capital markets Tier 4

Benefiting from a 'depth of experience across a range of transactions', KLEYR GRASSO handles work within the banking sector from a pure finance perspective, as well as in relation to adjacent litigation, corporate and restructuring work. The firm primarily acts for borrower clients and recently advised Samsonite on the provision of a $600m term loan facility to help shore up its balance sheet in the aftermath of the Covid-19 pandemic. The 'very friendly and open-mindedRenata Jokubauskaite and 'technical but practicalDelphine Tempé are pivotal members of the team and spearheaded the firm's work on behalf of Samsonite.

Practice head(s):

Rina Breininger; Jean-Paul Spang; Pascal Sassel; Renata Jokubauskaite

Other key lawyers:

Delphine Tempé


‘The firm has a depth of experience across a range of transactions and provides practical advice.’

‘The team has a client-oriented mindset and produces good work quality.’

‘Delphine Tempé and Renata Jokubauskaite provide technical but practical advice to legal issues.’

‘Renata Jokubauskaite is very friendly, open-minded and keen to discuss alternative strategies for all parties.’

Key clients

TA Associates


Luxembourg > Investment funds Tier 4

The 'experienced yet approachable' multi-disciplinary team at KLEYR GRASSO leverages the expertise of lawyers from within the firm's corporate, finance and regulatory departments to provide 'service-oriented advice' to alternative fund clients. 'Competent and professional' counsel Jeannette Vaude-Perrin is the main contact on the structuring front, and is well-versed at assisting clients on the establishment of the most appropriate regulated or unregulated investment vehicle to facilitate real estate, private equity, debt and infrastructure investment strategies.

Practice head(s):

Rina Breininger; Jean-Paul Spang; Jeannette Vaude-Perrin


The team is experienced yet approachable and provides service-oriented advice.’

Jeannette Vaude-Perrin is extremely competent and professional.’

KLEYR GRASSO is a long established independent law firm with high professional standards and entrepreneurial culture. Teams of strongly committed partners and lawyers of different nationalities, support local and international clients throughout their projects from inception to implementation. Our 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 management, real estate and construction, social and employment, dispute resolution and insurance and reinsurance.

Department Name Email Telephone
Banking and finance Rina Breininger
Banking and finance Jean-Paul Spang
Banking and finance Jean-Philippe Drescher
Banking and finance Renata Jokubauskaite
Capital markets Rina Breininger
Capital markets Jean-Paul Spang
Capital markets Delphine Tempé
Corporate M&A Rina Breininger
Corporate M&A Jean-Paul Spang
Corporate M&A Jean-Philippe Drescher
Corporate M&A Delphine Tempé
Corporate M&A Renata Jokubauskaite
Restructuring and insolvency Marc Kleyr
Restructuring and insolvency Pascal Sassel
Private equity Rina Breininger
Private equity Jean-Philippe Drescher
Private equity Delphine Tempé
Private equity Renata Jokubauskaite
Dispute resolution Marc Kleyr
Dispute resolution Pascal Sassel
Dispute resolution Donata Grasso
Insurance and reinsurance Rosario Grasso
Insurance and reinsurance Rina Breininger
Insurance and reinsurance Henry De Ron
Real estate and construction François Collot
Real estate and construction Yasmine Poos
Real estate and construction Henry De Ron
Social and employment Christian Jungers
Social and employment Anissa Bali
Social and employment Céline Defay
Social and employment Philippe Ney
Social and employment Sandra Rapp
Tort and criminal Rosario Grasso
Investment funds Rina Breininger
Investment funds Jeannette Vaude-Perrin
Photo Name Position Profile
Me Anissa Bali  photo Me Anissa Bali Partner – Employment and social law
Me Rina Breininger  photo Me Rina Breininger Partner – Corporate and M&A, Private Equity, Securities, Public Offerings, Capital Markets.
 François Collot  photo François Collot Partner – Real Estate & Construction, Leasing, Distribution law, Civil & Commercial…
Me Henry De Ron  photo Me Henry De Ron Partner – Real estate & construction, general commercial, insurance, dispute resolution with…
Me Céline Defay  photo Me Céline Defay Partner – Employment and social law
Me Jean-Philippe Drescher  photo Me Jean-Philippe Drescher Partner –  Corporate M&A, banking and finance, private equity.
Me Donata Grasso  photo Me Donata Grasso Partner – Banking and finance litigation, corporate litigation, shareholder and partnership disputes,…
Me Rosario Grasso  photo Me Rosario Grasso Co-founder and Senior Partner – Anti-Corruption & Anti Money Laundering legislation, White…
Me Renata Jokubauskaite  photo Me Renata Jokubauskaite Partner – Corporate, Mergers and Acquisitions, Capital Markets, Banking & Finance, Private…
Me Christian Jungers  photo Me Christian Jungers Partner – Employment and social law
Me Marc Kleyr  photo Me Marc Kleyr Managing Partner – Corporate finance and insolvency related litigation, restructuring and insolvency.
Me Philippe Ney  photo Me Philippe Ney Partner – Employment and social law
Me Yasmine Poos  photo Me Yasmine Poos Partner – Real estate and construction, public procurement procedures, civil and commercial…
Me Pascal Sassel  photo Me Pascal Sassel Partner – Dispute Resolution, Restructuring & Insolvency, Banking & Finance
Me Jean-Paul Spang  photo Me Jean-Paul Spang Partner – Corporate law, mergers and acquisitions, corporate restructurings and equity offerings.
 Delphine Tempé  photo Delphine Tempé Partner – Corporate and M&A, Private Equity, Capital Markets
Number of lawyers : 50
Contact : Marc Kleyr (managing partner)