
Praised by clients for its ‘perfect knowledge’, Dentons is noted for handling the full gamut of mandates across the life sciences and healthcare sectors. All jointly leading the group, Jean-Marc Grosperrin’s primary areas of expertise are private equity transactions and cross-border M&A within the pharmacy and biotech industries; Anne-Laure Marcerou is well versed in complex transactions, namely divestitures and strategic contractual matters; and Julien Le Guyader is recommended for his vast knowledge of market access and reorganisations within the medtech and pharma industries. Loïc Lemercier is a seasoned patent litigator who routinely acts in patent infringement and unfair competition cases, while Jessica Garestier stands out due to her regulatory specialism.
Testimonials
Collated independently by Legal 500 research team.
‘Very good knowledge of the health sector, very good networks, good cross-functional expertise ranging from corporate, to pharmaceutical regulations, to taxation.’
‘Julien Le Guyader and Jessica Garestier - great responsiveness, agility in dealing with transversal and complex subjects.’
‘The Dentons team showed its commitment by respecting deadlines as well as demonstrating professionalism. The collaboration with the Dentons team went very well and the quality of work was satisfactory.’
‘Very professional team with perfect knowledge of all sectors of life sciences, biotech, big pharma, CDMO, etc. Multidisciplinary team offering multi-sector expertise. The approach is innovative and always solution-oriented.’
‘Julien Le Guyander embodies dynamism and innovation. Julien is a reliable, accessible, available lawyer. An unwavering support.’
‘I have had the pleasure of working with Anne-Laure Marcerou and her team. They are not only extremely knowledgeable but also efficient, client focused, and prompt to turn around their work product which is always delivered to the highest standards. They are my go-to lawyers in France for life sciences matters.’
‘Anne-Laure Marcerou is excellent and her team is very good too.’
Key clients
- Pfizer
- Bpifrance Large Venture
- Verlinvest
- Lupin Pharmaceuticals Inc.
- Kyowa Kirin Pharma
- Laboratoires Coloplast
- Laboratoires Théa
- Septodont
- AL.CHI.MIA. S.R.L.
- Ophta France
Work highlights
- Advised Pfizer on the integration of Seagen France’s distribution activities of Tukysa® (a prescription medicine used to treat adults with breast cancer).
- Advised Bpifrance Large Ventures on its €39 million Series C financing of ENYO Pharma.
- Advised Verlinvest on its acquisition of a minority stake in French luxury cosmetics brand Cible Skin.
Lawyers

Practice head
The lawyer(s) leading their teams.
Jean-Marc Grosperrin, Julien Le Guyader, Anne-Laure Marcerou