"Tom Claassens is an excellent all-round lawyer with strong advocacy skills. He is also very client-friendly."
Chambers & Partners - High Net Worth (2025)
"Tom Claassens is a great lawyer to work with."
Chambers & Partners - High Net Worth (2025)
"Tom Claassens is a great advocate to listen to. He is quick on his feet and likes the fight. I always like crossing paths with him."
Chambers & Partners - High Net Worth (2025)
"Tom Claassens is a strong advocate with excellent client skills. He is smart, detail oriented and thinks strategically and outside the box. "
Chambers & Partners - High Net Worth (2025)
"Tom Claassens is very renowned and a joy to work with. He is solid."
Chambers & Partners - High Net Worth (2025)
"Tom Claassens is an excellent all-round lawyer with strong advocacy skills. He is also very client-friendly."
Chambers & Partners - Global (2025)
"Tom Claassens is a great lawyer to work with."
Chambers & Partners - Global (2025)
"Tom Claassens is a great advocate to listen to. He is quick on his feet and likes the fight. I always like crossing paths with him."
Chambers & Partners - Global (2025)
"Tom Claassens is a strong advocate with excellent client skills. He is smart, detail oriented and thinks strategically and outside the box. "
Chambers & Partners - Global (2025)
"Tom Claassens is very renowned and a joy to work with. He is solid."
Chambers & Partners - Global (2025)
"Tom Claassens is one of the most experienced arbitration partners in the Dutch market. Melle Boevink is very talented and composed - one to watch!"
Legal 500 - EMEA (2025)
"Tom Claassens is a leader in the field of litigation in the Netherlands with incredible depth of knowledge and experience. Tom is always there for the client providing personal advice and input and contributing his knowledge in every work-stream and at all stages of the proceedings. Tom is outstanding working on legally and factually complex cases, involving various jurisdictions and/or international arbitration angles. Melle Boevink is a brilliant and extremely talented lawyer. His advice is always efficient and spot-on."
Legal 500 - EMEA (2025)
"Tom Claassens is a very smooth advocate, articulate and personable."
Chambers & Partners - Global (2024)
"Tom is a very good strategic thinker."
Chambers & Partners - Global (2024)
"Tom Claassens is a very smooth advocate, articulate and personable."
Chambers & Partners - Europe (2024)
"Tom is a very good strategic thinker."
Chambers & Partners - Europe (2024)
Tom L Claassens is ranked Band 2 for Dispute Resolution: Arbitration Counsel
Chambers & Partners - Europe (2024)
"Tom Claassens is always a pleasure to work with – not only smart and eloquent but also a really nice guy."
Legal 500 - EMEA (2024)
"Tom Claassens and Melle Boevink are key. They are both excellent, responsive and pleasant to work with."
Legal 500 - EMEA (2024)
"Tom Claassens has broad experience of appearing before arbitral tribunals. Tom is a true leader, who at the same time offers a very personal approach to each client and every case. Tom is excellent both in his written submissions and on his feet before the court."
Legal 500 - EMEA (2024)
Tom Claassens named "Practice head" in Dispute Resolution: Arbitration
Legal 500 - EMEA (2024)
‘Tom Claassens has a sharp legal mind and excellent hearing presence, combined with a great sense of humor and the ability to make the most nervous client feel relaxed and confident.’
Legal 500 - EMEA (2023)
Tom Claassens named "Practice head" in Dispute Resolution: Arbitration
Legal 500 - EMEA (2023)
Tom Claassens particularly assists clients with the enforcement or annulment of arbitral awards. He also represents clients in shareholder disputes and damages claims under a variety of arbitral rules, including NAI and SIAC rules. A client appreciates that Tom Claassens has the "ability to really connect and get the best out of people," adding that "his approach to the people he works with is such that they feel really comfortable sharing everything, which strengthens the case."
Chambers & Partners - Global (2022)
‘Tom Claasens is experienced; and although originally and for a long time in his career a litigation lawyer, he has made a name for himself in arbitration in recent years’.
Legal 500 - EMEA (2022)
‘Tom Claassens is an excellent practitioner’.
Legal 500 - EMEA (2022)
‘Tom Claassens is very likeable, professional and with a good eye for what will be appreciated by the courts’.
Legal 500 - EMEA (2022)
"Tom Claassens has the ability to really connect and get the best out of people."
Chambers & Partners - Europe (2022)
Tom Claassens is recognised as Recommended in Commercial Litigation
Who's Who Legal - (2022)
Tom Claassens acts for a clientele of national states and domestic companies on arbitral matters covering commercial disputes, arbitral awards and bilateral investment treaties. Market commentators highlight his work in arbitration proceedings of an international scope.
Chambers & Partners - Global (2021)
‘Leading partner Tom Claassens is very smart and likeable. His team of associates work hard and are committed. The quality of the output is high. Tom Claassens is a great lawyer – smart, results-oriented, creative. He is the lead arbitration partner: experienced, smooth and well versed in the international arbitration practice. Being a very nice guy helps.'
Legal 500 - EMEA (2021)
According to sources, Tom Claassens is "first rate, intelligent and diligent." He acts for clients on arbitration proceedings following corporate transactions, joint ventures and arbitral award annulment procedures. His clients include multinational corporations and state governments.
Chambers & Partners - Global (2020)
"Tom Claassens has experience in commercial litigation and is increasingly focused on international arbitration. He is described as 'incredibly client-focused and smart' as well as a 'strategic thinker who comes up with creative arguments'."
Chambers & Partners - Europe (2019)
"Sources say: 'He is a fantastic lawyer: smart, effective, advises clients well, writes well and also speaks well in court'."
Chambers & Partners - Global (2018)
"According to clients, Loyens & Loeff’s team is ‘responsive, thorough, hardworking and a pleasure to work with’, and has significant experience representing international clients in International Chamber of Commerce proceedings. It is led by the ‘very detailed, thorough’ Tom Claassens, who is ‘an authority on Dutch civil procedure’ and 'a name to note'."
Mr Claassens is also listed in Who's Who Legal: Litigation 2018 among only 16 Dutch litigation peers.
Legal 500 - EMEA (2018)