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Testimonials
Collated independently by Legal 500 research team.
‘ALTIUS has an exceptional team. Their extensive knowledge and expertise are impressive.'
‘Kirian Claeyé stands out with his extensive knowledge of the industry and its regulations in the broad sense and approachability. He excels in providing clear and concise guidance, making complex concepts easily digestible. His communication skills enable him to articulate ideas effectively, while his ability to think outside the box brings innovative solutions to the table. ’
‘Fast and quality advice, applicable in reality.’
‘Highly dedicated and knowledgeable team working to achieve the best for their clients. Pleasure to work with - fast answers and advice!’
‘Kirian Claeyé is a trusted, engaged, subject matter expert. He is flexible and puts clients at the forefront, and is committed to finding timely solutions!’
‘The knowledge and experience of Belgian life sciences is as good as it gets.’
‘Kirian Claeyé has the ability to transform highly complex matters into practical advice. He has encyclopedic knowledge of Belgian life sciences law.’
Key clients
- Merck Sharp & Dohme
- Novartis
- Bayer Pharma
- Ferring
- Gilead
- Equine America
- Azelis
- Beiersdorf
- Organon
- Midmark
Work highlights
- Representing Novartis in ongoing proceedings before the Council of State and Belgian civil courts in relation to pricing and reimbursement decisions.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Next generation partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Christophe Ronse; Philippe de Jong; Kirian Claeyé
Other key lawyers
Bart Junior Bollen