Marleen van den Horst

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Marleen van den Horst is partner in the IP and Technology practice group and heads the industry group Healthcare and Life Sciences. Marleen has ample experience in conducting complex, cross-border proceedings on intellectual property. Specialised in patent law, she handles cases involving mechanical engineering, electrical engineering, chemistry and life sciences. These deal with topics ranging from hatch covers, electronic braille cells, sports field maintenance machines and flower bulb sorting machines to medical equipment and medicinal products. Marleen has achieved international recognition in the field of life sciences. She handles patent and regulatory proceedings regarding medicinal products with active ingredients such as ciclosporin, omeprazole, escitalopram, trastuzumab, zoledronate, imatinib, rituximab, ezetimibe/simvastatin and CRISPR-Cas9 technology. Aside from litigation, Marleen also assists clients in negotiating and drawing up licences, technology transfers and distribution and cooperation agreements.

Selected directory listings

Marleen van der Horst is highly skilled and highly experienced. She is deeply engaged in the cases handled by her team, stimulating excellence. Her team has a strong “can-do” approach.’ ‘Marleen van den Horst is incredibly well connected and respected, a skilful strategist and great person to work with’. – Legal 500, 2021

Marleen Van den Horst routinely assists a clientele drawn from the pharmaceutical industry with patent infringement and invalidity cases. Clients rate the direction she brings to projects, one suggesting that “she is well organised and able to strategise cases well.“- Chambers Global & Europe 2021

“She pushes forward energetically and is always ready to pursue unconventional approaches if they look promising.” – IAM Patent 1000, 2020

Practice head Marleen Van Den Horst has a well-established expertise in generic pharmaceuticals and is a ‘highly skilled litigator’ with ‘creative and commercially sound suggestions’Legal 500, 2020

Marleen Van den Horst is praised by clients for maintaining a “really good oversight” of cases. Her practice centres on contentious patent cases, where she frequently represents multinational pharmaceutical clients. – Chambers Global & Europe 2020

Marleen Van Den Horst heads the practice at BarentsKrans which has ‘respected lawyers with a broad network’ and who ‘go into depth in understanding technology and provide a strategy‘. Van den Horst has decades of experience in relation to litigation over blockbuster drugs and regulatory proceedings. – Legal 500, 2019

According to sources, Marleen van den Horst is ”a very good lawyer with excellent judicial skills.”Chambers Global 2019

Professional activities

  • Member of the Board of the NeoKidney Foundation
  • Member of various professional associations, including EPLAW, AIPPI, LES, HollandBio, VF&R and VIEPA.

She is a frequent speaker on international conferences.

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