Mr Kirian Claeyé > ALTIUS > Brussels, Belgium > Lawyer Profile

Kirian Claeyé photo

Work Department

Intellectual Property




The latest nominated Partner at ALTIUS (SEP 2023) Kirian specialises in intellectual property and regulatory affairs, with a particular focus on pharmaceuticals and life sciences.

His IP work focuses on complex patent litigation, often involving cross-border issues, parallel trade disputes, and support and advice regarding IP portfolio management. His regulatory work spans the fields of  launch and marketing strategies, pricing and reimbursement, tendering, advertising, and lifecycle management.

He regularly speaks at conferences and seminars, is host of ALTIUS’ annual Pharma Law Seminar, and organises ALTIUS’ two-monthly Life Sciences Sessions.


Kirian is fluent in Dutch, English and French


Kirian is a member of the Boalt Hall Alumni Association, (Young) EPLAW, Licensing Executives Society, Belgian American Educational Foundation and the International Association for the Protection of Intellectual Property.


Kirian graduated at the University of Ghent magna cum laude and acquired international experience through postgraduate studies (LL.M) at the University of California, Berkeley School of Law, where he also obtained the Law and Technology Certificate.

  • Master in Law (University of Ghent)
  • LL.M. (University of California, Berkeley School of Law)
  • Law and Technology Certificate (University of California)

Lawyer Rankings

Belgium > Intellectual property

(Next Generation Partners)

Kirian Claeyé  – ALTIUS

The intellectual property practice at ALTIUS runs the gamut of intellectual property and unfair competition mandates with patents, parallel trade matters and geographical indications among the team’s core areas of expertise. A trio of partners head up the team: Christophe Ronse is well versed in patent law and life sciences; Olivier Vrins frequently wins plaudits for his work on anti-counterfeiting cases; and Philippe de Jong handles a steady stream of litigation related to plant variety rights. Kirian Claeyé, who made partner in September 2023, has a notable focus on patents and is a key contact for pharmaceuticals clients. Trade mark and patent litigation are strong suits of Sophie Lens, while Alexander De Bleeckere is another name to note.

Belgium > Industry focus: Healthcare and life sciences

(Next Generation Partners)

Kirian Claeyé – ALTIUS

Housing a team which is praised by clients for its ‘unmatched‘ quality, ALTIUS dispenses expert advice to a varied client base of pharmaceutical, biotech, and software developers. The practice handles a broad range of issues, including pricing and reimbursement work, data related license agreements, and hospital tenders. Christophe Ronse leads the team alongside Philippe de Jong. Ronse is noted for his expertise in acting for domestic and international healthcare clients in both national and international patent disputes, while de Jong handles a broad range of IP issues concerning parallel imports and plant variety rights. Promoted to partner in September 2023, the ‘hands-onKirian Claeyé contributes his deep regulatory knowledge of marketing strategies, clinical trials, and life cycle management.