A&O Shearman
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A&O Shearman fields a diverse IP practice, encompassing enforcement, portfolio management, disputes, and transactional patent mandates. Heading the team is seasoned IP litigator Frits Gerritzen, who is predominantly focused on patent disputes in the fields of medical equipment, pharmaceuticals, and antibodies. Gerritzen also advises on R&D agreements, licensing agreements, and the structuring of IP portfolios. Sara Swinkels is a further key contact. Marleen van Putten departed from the firm in April 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘The strength lies in the quality of the individuals but also in the fact that, whether across IP, in legal affairs, litigation or any other discipline, it is all in-house.’
- ‘The individuals are all highly ambitious and are extremely dedicated.’
Key clients
- Prosus
- Waterland Private Equity
Work highlights
Advising NPM Capital on the merger of their portfolio company, Ultimaker and Stratasys’ subsidiary MakerBot.