Firm Profile > KLEYR GRASSO > Luxembourg, Luxembourg

7 rue des Primeurs
L-2361 Strassen

Dispute resolution Tier 1

Under the leadership of the 'outstanding and knowledgeableMarc KleyrKLEYR GRASSO provides 'precise and efficient' advice to local and international corporates, state entities and financial services clients on complex business and commercial disputes, including shareholder litigation. Benefiting from the expertise of six partners with a focus on litigation, the firm's work extends beyond corporate disputes, to also include a significant flow of real estate, administrative and employment litigation. Pascal Sassel provides 'insightful advice' to clients, particularly as it relates to corporate finance and insolvency disputes and is a key member of the team that also includes 'the very knowledgeableFrançois Collot, whose primary focus is on real estate and construction cases.

Practice head(s):


The team is very professional and empathetic.

The availability and experience of the team is a strength and very valuable for clients.

The sharp and experienced Marc Kleyr has a smart and pragmatic approach on complex cross-border issues.

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

Key clients


HITEC Luxembourg S.A.



Ministère du Développement Durable et des Infrastructures




Owenshill S.A.


Sources Rosport


Employment Tier 1

Jointly headed by Christian Jungers and Philippe NeyKLEYR GRASSO's two-partner team provides 'reactive and practical advice' to domestic and multinational corporates across the waterfront of contentious and non-contentious matters, including as it relates to terminations, social plans, immigration and restructuring. 'Brilliant' counsel Céline Defay  'always tries to find the best solution for the employer'; she is particularly strong advising on matters relating to dismissals and settlement agreements, harassment and discrimination issues.


The firm’s advice is always straight to the point and immediately applicable.

Sandra Rapp is always reachable and reactive; her advice is very practical and can be implemented very easily.

Céline Defay is very empathetic to the requirement of clients.

Key clients

Carmignac Gestion Luxembourg S.A.

Real estate and construction Tier 1

Jointly headed by the 'client-focusedFrançois Collot and 'extremely practicalYasmine PoosKLEYR GRASSO's three-partner team has 'excellent knowledge of the Luxembourg real estate rules'. Work includes advice to funds on their real estate investments, as well as for developers and corporates on major commercial real estate projects. The team also handles real estate and construction litigation and is noted for its 'great know-how of market practice and case law in Luxembourg'.

Practice head(s):


The team is extremely efficient, precise and to-the-point.

The firm is able to quickly provide you with a practical analysis and is also able to follow up with litigation in the Luxembourg courts when necessary.

François Collot is reliable and competent and provides very appropriate advice on litigation and contractual matters.

Yasmine Poos has a lot of expertise in the Luxembourg real estate and commercial property market.

Yasmine Poos and Mélanie Trienbach are very technical and have an excellent knowledge of the real estate Luxembourg rules. They are able to assist their clients in negotiation with the authorities.

Henry de Ron provides very good support.

Key clients


Thomas & Piron

Ministère du Développement Durable et des Infrastructures


BC Investors



Group Hochtief


Kalchesbrück S.A.

Commercial, corporate and M&A Tier 2

Benefiting from an 'in-depth knowledge of the Luxembourg market and its key stakeholders', KLEYR GRASSO's four-partner team is well placed to advise institutional investors and multinational companies across a range of corporate transactions (including M&A, takeovers and buyouts) and day-to-day commercial matters. The 'excellentRina Breininger has extensive M&A capability and takes the lead on behalf of core private equity client, TA Associates, on its downstream investments and disposals. Delphine Tempé is 'absolutely outstanding' and has enhanced the firm's capability on the private equity front following her arrival in July 2018 from Dentons.


The team is proactive in its efforts to deliver a higher quality work product than the standard practices you find on the market.’

Delphine Tempé is very focused, hardworking, diligent and fun to work with.

Renata Jokubauskaite is extremely reliable and is always available to support her clients.

Key clients

Héroux-Devtek Inc.

Samsonite International

Carl Kliem S.A.

Voyages Simon

Presto Interim S.A.


Lecta Group/CVC Capital Partners


LuxConnect S.A.

Insurance Tier 2

KLEYR GRASSO is active on both the corporate and disputes front for insurance. Recently promoted partner Henry de Ron handles insurance disputes, relating to inter alia coverage and liability, as part of his broader commercial litigation offering. Karine Vilret joined Wildgen,

Investment funds Tier 3

Considerably strengthened by the arrival in January 2019 of 'wise and seasoned professionalJeannette Vaude-Perrin from Bonn & SchmittKLEYR GRASSO provides 'very knowledgeable and helpful' advice to domestic and international clients across the spectrum of regulated and unregulated alternative investment fund structures. Leveraging its strong corporate and M&A offering, the team is also regularly engaged on significant downstream investment activity in the private equity space.


Any fund-related questions are answered swiftly and with great insights.

Rina Breininger and Jerome Burel have a wealth of experience across transactional and regulatory matters servicing top-tier private equity clients.

Jeannette Vaude-Perrin has a strong industry knowledge and is able to provide precise and adding value advice to her clients.

The very wise Jeannette Vaude-Perrin has deep investment funds expertise.

Jeannette Vaude-Perrin has a 360 degree knowledge of the investment funds industry.

Jeannette Vaude-Perrin possesses unsurpassed technical expertise and especially benefits from her long term relationship to the regulatory administration of the Luxembourg CSSF.

Key clients

TA Associates

Private equity Tier 3

KLEYR GRASSO is 'very knowledgeable of the Luxembourg private equity market'. Praised for its 'high-quality service', clients appreciate the firm's partner-led approach which enables it to handle complex and often bespoke mandates. The firm handles a significant amount of work for global growth private equity firm, TA Associates. Rina Breininger is noted for her private equity-related M&A work.


Fantastic quality, availability and intelligence.

Rina Breninger and Jerome Burel work well together and provide a proactive and solution-oriented service.

Key clients

TA Associates

Lecta/CVC Capital Partners

IK Investment Partners

CVC Capital Partners

Banking, finance and capital markets Tier 4

KLEYR GRASSO regularly acts for corporates and funds on their financing and regulatory requirements. Spearheaded by Pascal Sassel, the team also has strength in relation to restructuring and refinancing matters. Although she is primarily involved in corporate and M&A work, the 'knowledgeable and commercialDelphine Tempé regularly advises on capital markets matters. Rina Breininger is another key name for capital markets work.

Practice head(s):

Key clients

GSO Capital Partners

Samsonite International

Héroux-Devtek Inc

TA Associates

Imperial Logistics International B.V. & Co KG

Founded in 1994, the firm built up a strong reputation in litigation and advisory services to local clients. As of 2000, the firm turned towards international clients and cross-border business. Today, it advises local and multinational companies from all industry sectors, leading institutional investors, prestigious private equity houses and numerous other businesses in almost all practice areas, including key areas such as corporate M&A, restructuring and insolvency, private equity, banking and finance, real estate and construction, social and employment, dispute resolution and insurance and reinsurance.

Boasting some 50 lawyers of six different nationalities, the multilingual, flexible and accessible team is pro-active, responsive and offers personalised legal services of the highest quality. The firm has a total staff of approximately 70 persons, including 13 partners.

Department Name Email Telephone
Banking and finance Rina Breininger
Banking and finance Jean-Paul Spang
Capital markets Rina Breininger
Capital markets Jean-Paul Spang
Corporate M&A Rina Breininger
Corporate M&A Jean-Paul Spang
Restructuring and insolvency Marc Kleyr
Restructuring and insolvency Pascal Sassel
Private equity Rina Breininger
Dispute resolution Marc Kleyr
Dispute resolution Pascal Sassel
Dispute resolution Donata Grasso
Insurance and reinsurance Rosario Grasso
Insurance and reinsurance Rina Breininger
Real estate and construction François Collot
Real estate and construction Yasmine Poos
Social and employment Christian Jungers
Social and employment Philippe Ney
Social and employment Sandra Rapp
Tort and criminal Rosario Grasso
Investment funds Rina Breininger
Photo Name Position Profile
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 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
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)