Company lists · Data refreshed September 2026
Top 25 Trade secret law firms based in the Netherlands
RevenueBase identified 51 trade secret law firms headquartered in the Netherlands as of September 2026 and tracks 604 professional contacts across them, including 380 with verified work emails and 38 with mobile numbers. Amsterdam is the largest hub.
This list covers trade secret law firms headquartered in the Netherlands, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest trade secret law firms based in the Netherlands
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 136 contacts → | |||
“Arnold & Siedsma has a unique and broad expertise protecting intellectual property.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Partial evidence | 77 contacts → | |||
“EP & C is a law firm specialized in protecting your ideas and commercial assets by patents and designs.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 75 contacts → | |||
“For more than 55 years, we have been committed to innovation and the protection of intellectual property.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 63 contacts → | |||
“Knijff Trademark Attorneys is a company specialising in the protection of trademarks, designs and company names.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Partial evidence | 19 contacts → | |||
“Leeway is an Amsterdam-based law firm specialising in intellectual property, technology and media & entertainment and all related commercial issues and contracts.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Indirect evidence | 18 contacts → | |||
“BINGH Advocaten is een gespecialiseerd kantoor in het hart van Amsterdam.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 13 contacts → | |||
“Vriesendorp & Gaade is your expert for complete and personal services with respect to legally protecting your inventions, designs, trademarks and other intellectual legacy…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Partial evidence | 13 contacts → | |||
“We are an independent boutique law firm in Amsterdam, specialized in intellectual property law, advertising law and food law.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 11 contacts → | |||
“DOGIO stands for “De OctrooiGemachtigde bij Innovatie en Ontwikkeling”; the Patent Attorney for Innovation and Development.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Indirect evidence | 10 contacts → | |||
“BOLT Advocaten is een advocatenkantoor in het centrum van Utrecht gespecialiseerd in arbeidsrecht, ondernemingsrecht, vastgoedrecht, IT & IE-recht en verzekeringsrecht voor…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | Indirect evidence | 9 contacts → | |||
“A strong corporate identity makes that customers recognize your trademark.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Partial evidence | 9 contacts → | |||
“Ventoux is a Dutch niche law firm that focuses on the exploitation and protection of intellectual capital.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 8 contacts → | |||
“BRIGHT ip lawyers is een nichekantoor gespecialiseerd op het gebied van intellectueel eigendom (IP).” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Indirect evidence | 7 contacts → | |||
“LAWYERS OF CHANGE - Louwers IP & Tech Advocaten is a no nonsense niche firm specialised in the closely intertwined fields of intellectual property & innovation, IT & IT…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Partial evidence | 6 contacts → | |||
“Rise is a boutique law firm specialized in the protection of trademarks and designs.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Partial evidence | 5 contacts → | |||
“The law firm Visser Schaap & Kreijger specialises in intellectual property, media and competition law.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Indirect evidence | 5 contacts → | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Partial evidence | 5 contacts → | |||
“IPCO Law takes Intellectual Property (IP) protection to the next level.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Indirect evidence | 4 contacts → | |||
“KLOS c.s.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Partial evidence | 4 contacts → | |||
“We are Walden Law, a team of seasoned and meticulous legal advisors, negotiators and litigators, specialized in intellectual property, art, media and privacy.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Partial evidence | 4 contacts → | |||
“Specialized in Corporate Law, Commercial Contracts, Employment Law, and Intellectual Property Law.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | Indirect evidence | 3 contacts → | |||
“Markedly is a boutique firm specializing in the protection of intellectual property.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | Partial evidence | 3 contacts → | |||
“Octrooibureau NOVOPATENT is a privately held IP Law Firm based in the centre of The Netherlands.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | Indirect evidence | 3 contacts → | |||
“Los & Stigter is a well-known brand in the field of intellectual property and its protection.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Partial evidence | 3 contacts → | |||
“Good Law B.V.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: trade secret law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names trade secret law firms.
- Partial evidence
- Its own public description names part of trade secret law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name trade secret law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
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Trade secret law firms based in the Netherlands at a glance
As of Sep 6, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among trade secret law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the Netherlands whose own description of what they do matches “trade secret law firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names trade secret law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among trade secret law firms, and records with no verified work email. Companies headquartered outside Netherlands are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 380 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names trade secret law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many trade secret law firms are there based in the Netherlands?
RevenueBase identified 51 trade secret law firms headquartered in the Netherlands as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Arnold & Siedsma, headquartered in Den Haag, tops this list with the largest team on record.
Which city has the most trade secret law firms?
Amsterdam leads with 9 headquartered companies, followed by Den Haag (2) and Eindhoven (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 380 verified decision-maker contacts tracked across these 51 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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