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Marc Custers

Counsel - Attorney at Law

Marc Custers, counsel, is a member of the Competition Team of the Expertise Group Corporate / M&A in our Amsterdam office.

+31 20 578 52 63
marc.custers@loyensloeff.com
Amsterdam
Dutch, English, French, German, Italian
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Marc specialises in EU law and competition law (merger control, anti-trust, state aid and public procurement). He has broad experience in proceedings before the European and Dutch courts, the European Commission and the Dutch Competition Authority. He has also assisted clients in complex cartel damages proceedings and has been involved in various important state aid matters. Marc is editor of the Tijdschrift voor Staatssteun (a State aid journal).
Marc is a member of the Loyens & Loeff Competition Litigation Team. He has published various articles on competition law and is a regular speaker at conferences.

Expertises
Competition & Regulatory Competition Litigation Corporate Crime & Compliance

Work highlights

Contributions

Memberships

Netherlands Association for European Law
Netherlands Association for competition Law
International Bar Association
American Bar Association

Qualifications

French language and literature, Radboud University Nijmegen, 1987
Studies in the field of international and EU law, LUISS University Rome, 1991/1992
Dutch law, Radboud University Nijmegen, 1992
Grotius Academy corporate law, 1996
Event
The proposal for an EU Public Procurement Act: key changes and practical implications
12-11-2026
12:00 - 13:30 CET
The proposal for an EU Public Procurement Act: key changes and practical implications
We are pleased to invite you to our lunch & learn sessions “The proposal for an EU Public Procurement Act: Key changes and practical insights”, organised in Belgium, Luxembourg and The Netherlands.
Read more

What others say

"Marc Custers combines partner-level experience and expertise with pragmatism"
Legal 500 - EMEA (2026)
"Very smart and experienced, excellent judgment, very approachable."
Legal 500 - EMEA (2026)
"Marc Custers stands by your side through any competition and regulatory process."
Legal 500 - EMEA (2025)
"Marc Custers delivers detailed and high-quality advice. He really understands our business and the challenges we face. His advice is always tailor-made and in clear language, so that our business fully understand the legal matters."
Chambers & Partners - Europe (2024)
"He always gives to-the-point advice."
Chambers & Partners - Europe (2024)
"He's good at translating the business case to where it's relevant for competition law."
Chambers & Partners - Europe (2024)
"Marc Custers is a super specialist who doesn"t lose sight of the practical applications of his knowledge. He is easy to work with, accessible and very hands on."
Legal 500 - EMEA (2024)
Marc Custers named "Practice head" in EU and Competition
Legal 500 - EMEA (2024)
Marc Custers named "Practice head" in EU and Competition
Legal 500 - EMEA (2023)
Marc Custers is recognised as "Recommended" in Competition
Who's Who Legal - Other (2024)
Marc Custers assists with merger clearances before the ACM and state aid issues. Clients endorse his user-friendly style, one saying that "it is always a pleasure to work with him," and adding: "He is a very amicable person." His client list encompasses municipalities, insurers and private equity firms.
Chambers & Partners - Europe (2021)
‘Marc Custers understands our business, advice is practical, concrete and to the point.’
Legal 500 - EMEA (2021)
Marc Custers is best known for representing clients in cartel cases. He also regularly advises clients on all aspects of merger control in the energy and healthcare sectors.
Chambers & Partners - Europe (2020)
"Marc Custers impresses clients with his commercial approach. One interviewee notes: "He understands our business and provides us with pragmatic advice. He is smart and quick and his advice is always very helpful." His scope of expertise includes merger control notifications and cartel investigations and litigation."
Chambers & Partners - Europe (2018)

Marc Custers

Counsel - Attorney at Law

+31 20 578 52 63

marc.custers@loyensloeff.com

Amsterdam

Dutch, English, French, German, Italian

Download vCard

<p>Marc Custers, counsel, is a member of the Competition Team of the Expertise Group Corporate / M&A in our Amsterdam office.</p>

Marc specialises in EU law and competition law (merger control, anti-trust, state aid and public procurement). He has broad experience in proceedings before the European and Dutch courts, the European Commission and the Dutch Competition Authority. He has also assisted clients in complex cartel damages proceedings and has been involved in various important state aid matters. Marc is editor of the Tijdschrift voor Staatssteun (a State aid journal).
Marc is a member of the Loyens & Loeff Competition Litigation Team. He has published various articles on competition law and is a regular speaker at conferences.