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Partner / Co-head of practice : Willem Leppink
Quick facts
Year of Establishment

1995

Partners

28

Other qualified practitioners

50

Total number of lawyers

90

Practitioners (worldwide)

90

Languages

English, Dutch, German, French

Network memberships

INTA, MARQUES, ECTA, BMM

Key practice areas
Intellectual property
Trade mark disputes
Trade mark
Patent
Trade mark prosecution - patent & trade mark attorney firms
Trade mark prosecution - law firms
Firm overview

Most companies want more from a law firm than straightforward legal advice. They want to hear the best solution to their issues in clear language. The entrepreneur’s solution. A solution that works and gives them confidence in the future of their company.

Ploum is a full-service law firm that prioritises giving personal attention to clients and building long-lasting relationships. With a practical approach that is energetic, no-nonsense and without frills, we strive to tackle your challenges promptly. Legal knowledge is the basis we start from and business instinct is our forte. This is Ploum. This is what makes us your partner in business.

Legal matters, business counts

Effective legal protection is essential if you wish to retain the IP rights to your product or creation. This applies to your trademarks, logos and domain names, as well as your designs. And you also want to ensure that your marketing and after-sales services are taken care of effectively.

Specialised IP team

Part of our full-service offering is our dedicated IP team with a strong focus on trademarks, copyright and designs. In addition, we are experts in domain name disputes and in marketing and advertising law.

Based in the heart of Europe’s largest port, we assist many IP owners not only in the Netherlands, but also in other countries in the European Union and beyond. We manage international trademark portfolios and have assisted brand owners in setting up and managing pan-European customs border detention orders in close cooperation with Customs and other law enforcement agencies and programmes to combat unauthorised parallel trade. We have set up programmes to stop general trademark infringements, stop trademark genericisation and stop phishing activities using domain names containing our clients’ trademarks.

We have a single integrated approach: overseeing not only trademark prosecution issues but also trademark litigation, copyright issues and knowing what marketing law issues may arise, which is possible thanks to the deep understanding that we have of our clients’ needs. Having the knowledge and the extensive expertise of what happens or could happen after, say, trademark clearance or filing an application not only in the European Union or the Benelux, but also other countries worldwide, enhances the quality of the work that we do and ensures that we are always one step ahead.

Key members of the IP team include Willem Leppink, Sabin Tigu, Yvonne Hamerling, Paul Trapman,Michelle Roosma, Sarith Jonker, Hidde van der Kaaij, and Anja Pazira.

We work closely together with our firm’s customs, trade and logistics team, which has a unique practice and solid track record in the area of customs and trade law.

Safeguarding your IP rights

At Ploum, our specialists can advise and assist you in protecting your IP rights. Our team includes certified Benelux and European trademark attorneys and we can assist you in managing your trademark and designs portfolio. It goes without saying that we can take care of your trademark registrations in the Benelux or the European Union. We can represent you before the Benelux Office for Intellectual Property and the EUIPO, as well as before their appeal bodies. We are known for our pragmatic analysis of trademark searches.

Tackling illegal practices

If you are troubled by unfair or illegal trade practices, marketing and advertising issues, unfair commercial practices, abuse of your trade secrets, promotional games of chance issues or a domain name dispute, or if you have discovered that others are trading imitations or parallel imports of your products or their packaging, Ploum will help you tackle this. Although we have a great track record for settling out of court, we will also represent you in court proceedings and before the Netherlands Authority for Consumers and Markets (ACM) or the Advertising Code Commission (RCC) should the need arise.  

International support

Since the challenges facing businesses do not respect national boundaries, Ploum maintains a wide and reliable network of law firms and agents, and we cooperate with other lawyers and service providers on a daily basis all over the world. We are also associated with a number of organisations such as MARQUES and INTA, and play an active role in the Benelux and international IP community.

Practice Areas & Sector Specialisations

Key IP Areas

Copyright, Copyright & related rights, Designs, Intellectual property, Intellectual property (contentious), Intellectual property (prosecution), IP transactions, Trade mark, Trade mark (contentious), Trade mark (prosecution)

Key Sector Expertise

Advertising, Aerospace, Automotive, Banking, Chemical, Computer technology & services, Construction and materials, Consumer goods and services, E-commerce, Electronics, Energy, Fashion & luxury goods, Food and beverage, Furniture, Gaming, Government and public policy, Healthcare, Hospitality & leisure, ICT & software, Industrials, Insurance, Investment management, Logistics, Mechanical, Media, Oil and gas, Professional services, Publishing, Real estate, Renewable energy, Retail, Shipping, Sports, Technology hardware, Tobacco, Tourism, Transport, Universities & research, Utilities

Address:
Blaak 28, Rotterdam
3011TA, Netherlands
Tel:+31104406440 Email:Contact Us Web Address:https://www.ploum.nl/en
2026 Edition
Trade mark disputes
Tier 3
23 firms ranked
View full list

Tier 1

Bird & Bird
9 practice areas
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Brinkhof
7 practice areas
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DLA Piper
7 practice areas
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De Brauw Blackstone Westbroek
9 practice areas
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HOYNG ROKH MONEGIER
6 practice areas
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Tier 2

Hogan Lovells Cadwalader
7 practice areas
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KLOS
5 practice areas
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Kennedy Van der Laan
5 practice areas
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Visser Schaap & Kreijger
7 practice areas
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Tier 3

AC&R
5 practice areas
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Hoogenraad & Haak
5 practice areas
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Leeway
7 practice areas
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Mount Law
3 practice areas
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NautaDutilh
6 practice areas
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Ploum
6 practice areas
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Winston Taylor
9 practice areas
View full profile

Other Notable Firms

&Co Advocaten
3 practice areas
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Arnold & Siedsma
7 practice areas
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BRIGHT ip lawyers
4 practice areas
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Dentons
6 practice areas
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Fieldfisher
4 practice areas
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Holla legal & tax
5 practice areas
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Porterfield
4 practice areas
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Trade mark prosecution - law firms
Tier 2
11 firms ranked
View full list

Tier 1

Bird & Bird
9 practice areas
View full profile
DLA Piper
7 practice areas
View profile
Leeway
7 practice areas
View profile

Tier 2

Brinkhof
7 practice areas
View profile
Ploum
6 practice areas
View full profile
Winston Taylor
9 practice areas
View full profile

Tier 3

HOYNG ROKH MONEGIER
6 practice areas
View full profile
Kennedy Van der Laan
5 practice areas
View profile

Other Notable Firms

Baker McKenzie
1 practice area
View profile
Louwers IP&Tech Advocaten
5 practice areas
View profile
Spiegeler Advocaten
4 practice areas
View full profile
Overview

Ploum is known for soft IP orientation in related copyright and database rights work. Anti-counterfeiting and unfair competition cases are specialities for differentiated Dutch and international clients. Trade mark prosecution before the EUIPO and Benelux Court is also provided 

Notable practitioners: Willem Leppink, Sabin Tigu and Yvonne Hamerling 

Testimonials

2026

"They are extremely service-oriented, responsive and provide service at reasonable costs."

"Ploum as a truly Dutch law firm, has an excellent local network with correspondingly outstanding market knowledge. Our cooperation with their Rotterdam office, which is existing for twenty years, is excellent, with the exceptionally fast and extremely expert handling of cases, the outstanding responsiveness as well as the profound knowledge of the entire IP team. The estimates and invoices are also clear and transparent. For us, clearly the number 1 for IP in the Netherlands."

"Ploum is the number one choice for the Netherlands."

"Professional and commercial, experts who deliver a client led service and that I know I can rely on to be responsive and deliver the excellence that my clients need."

"The whole team at Ploum are just excellent. Highly responsive and commercial."

"The individuals are approachable, commercial and deliver no-nonsense advice that is easily conveyed to clients."

Willem Leppink

"He is very service-oriented, has in-depth knowledge (even if these are very new trends) and is super responsive."

"For more than ten years, our main contact persons is  the extremely renowned senior partner Willem Leppink. We greatly appreciate this cooperation, in particular, his enormous commitment, his goal to always achieve more than the competitors, his enormous experience and his passion with which he practices his profession. We, and above all our clients, are always impressed by how rapidly he is able to present convincing solutions even in the most complex cases."

"Leads by example. Personable, responsive, considered and a true team player. Delivers excellence every time."

 

2025

"Great experience in handling opposition work."

"It is a small and efficient outfit.

"Ploum has a deep roster of excellent attorneys who deliver top-notch legal services."

"They are very user-friendly, provide a prompt and reliable service and provide commercial advice."

"Reliable law firm. One of the best in the Netherlands."

"[A] very pragmatic, business-oriented [law firm] with IP knowledge and reasonable pricing."

"The team are very close and consistent in handling cases. Very pragmatic and efficient. They almost feel part of our own in-house team."

"Ploum has an excellent local network with correspondingly outstanding market knowledge. The cooperation with their Rotterdam office is excellent, with exceptionally fast and expert handling of cases.

"The responsiveness is outstanding, as is the profound knowledge of the entire IP team. The estimates and invoices are also clear and transparent. For us, clearly the number 1 for IP in the Netherlands."

"[They are] good value for money."

"They consistently provide creative solutions to difficult issues and deliver great outcomes for our clients."

"Often trademark matters need actioning very quickly in order to meet non-extendable deadlines. We can rely on Ploum to be responsive and ensure that they meet our deadlines."

"[They have] experienced and knowledgeable lawyers."

Willem Leppink

"Willem keeps track of all developments and is overall a nice guy."

Linked Reviews
Trade mark

Assorted highlights include customs enforcement for international fashion houses against Easycosmetic in parallel import cases. It also acted for Western Digital Technologies in EUIPO opposition and Benelux trade mark portfolio management. Associates Evianne Roos and Linde Merkus joined in 2024.  

Intellectual property

Copyright  

The soft practice acted for Semantx in trade secret litigation culminating in a settlement agreement. It also represented Liptis in copyright infringement relating to infant formula.

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