In its 2016 edition, Chambers Europe is again ranking our firm in the leading firms. We are ranked in the 1st Tier in Dispute Resolution and in Employment with two lawyers also individually ranked in Tier 1.


Within Dispute Resolution, we are again ranked among the top 4 law firms (Tier 1) in the Luxembourg legal market.

What the team is known for First-class practice renowned for dealing with high-profile and complex disputes, both domestic and cross-border in nature. Recent experience includes high-value insurance and real estate disputes, alongside activity on banking cases, shareholder disputes, insolvency and employment-related matters.

Strengths (Quotes mainly from clients) “The team is very responsive and practical in its advice. It looks for solutions, and doesn’t just follow process.”
“The lawyers have a great talent for identifying the core legal issues and excluding irrelevant matters.”

Notable practitioners
Managing partner and co-founder Marc Kleyr is praised by clients as a “brilliant lawyer who thinks extremely quickly, makes connections, and has a brilliant mind for developing strategies.” Renowned for his commercial and corporate litigation expertise, he also assists with shareholder disputes, finance litigation and insolvency-related cases.
Donata Grasso has particular expertise in banking and corporate litigation, including bank liability, insolvency proceedings and shareholder and partnership disputes. She also has considerable experience of cross-border litigation matters.
Firm co-founder Rosario Grasso is a distinguished practitioner in the field of white-collar crime and other criminal lawcases.
Sources describe Pascal Sassel as a “very good litigator – he’s a tough lawyer and a good technician.” His increasingly renowned practice largely focuses on corporate, finance and insolvency-related litigation.


Within Employment, we are ranked in the Tier 1 among the top 4 law firms.

What the team is known for Highly reputed practice that advises clients on individual and collective, contentious and non-contentious, domestic and cross-border employment law issues. Recent experience includes restructurings, terminations and harassment claims.

Strengths (Quotes mainly from clients) “The adequacy and appropriateness of advice that the lawyers give is well aligned to what the client is looking for.”
“The team is experienced and able to promptly apprehend the issues raised by a transaction or a restructuring and its implications.”

Notable practitioners
Practice head Christian Jungers is a widely admired figure in the Luxembourg employment market. He regularly advises the Ministry of Finance and the Ministry of Infrastructure on labour law issues, as well as several international banks. Clients recognise him as “actively involved with a pragmatic approach.”


Real Estate – our firm continues to be ranked in the top 8 law firms in the Luxembourg legal market.

What the team is known for Offers extensive experience of real estate and construction matters, including advising clients on private, commercial and corporate real estate. Boasts expertise in co-ownership matters, lease and rent agreements, as well as contentious real estate and construction issues.

Strengths (Quotes mainly from clients) “KLEYR GRASSO is responsive, pragmatic and gets things done.”
“Availability, responsiveness – it’s a one-stop shop.”

Notable practitioners
François Collot co-heads the civil and commercial litigation department, and has expertise in a range of property, leasing and construction disputes. Clients say: “He’s definitely highly recommended. Real estate and construction law are his core business.”


In Corporate/Commercial, our firm is ranked in the top 11 law firms in the Luxembourg legal market.

What the team is known for Independent firm with a strong reputation for domestic and cross-border transactions, regularly winning referrals from foreign law firms for international mandates. Clients include private equity houses, institutional investors and multinational companies.

Strengths (Quotes mainly from clients) “KLEYR GRASSO is our firm of choice in Luxembourg. It is an impressive full-service firm with a large number of highly talented professionals.”
“The team is very effective, has a good approach to clients and is very responsive.”

Notable practitioners
The “very intelligent” Jean-Paul Spang acts on M&A, restructurings, equity capital markets and private equity. Sources say: “He is excellent, very pragmatic and dedicated to his clients.”
One interviewee describes Patrick Chantrain as “very calm, knowledgeable and respected.” He advised GSO Capital Opportunities Fund II on the financing of the acquisition of Helios Domžale by Ring International Holding.
Managing partner Marc Kleyr is described by sources as a “brilliant lawyer,” who is experienced in corporate restructurings and corporate litigation.


In Banking & Finance, our firm is ranked among the top 12 law firms in the Luxembourg legal market.

What the team is known for Advises on all aspects of banking law, with regular instructions from local and multinational clients in major asset, corporate, project and real estate finance matters. Offers further expertise in secured and unsecured bank lending transactions and investment-related regulatory matters.

Strengths (Quotes mainly from clients) “Very responsive and able to operate at high speed when required. Diligent and good to work with.”

Notable practitioners
Patrick Chantrain is co-head of the corporate and finance practice. Clients describe him as “a great guy who is knowledgeable and impressive, but also very discreet and humble.”


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