
Dechert LLP is widely recognised for its prowess in complex, high-stakes antitrust investigations and litigation before the French and EU regulators and courts, recently representing blue-chip clients in some of the most high-profile challenges to fines imposed by the FCA. In addition, the firm frequently assists in dawn raids, follow-on damages claims and merger control cases. The team has a particularly strong presence in the life sciences sector, where practice head Mélanie Thill-Tayara (who also co-leads the global life sciences practice) is a leading reference for antitrust matters. Laurence Bary excels in cartel and abuse of dominance cases. Marion Provost is another key team member.
Testimonials
Collated independently by Legal 500 research team.
- "Great expertise and commitment."
- "A multidisciplinary team that perfectly integrates the local and European regulatory dimensions of our business. Great experience in the pharmaceutical market. A very female team, approachable, attentive, with a lot of experience."
- "Mélanie Thill-Tayara, experience, leadership. Over 25 years of collaboration together on litigation and advisory matters. Marion Provost, Laurence Bary, Sophie Pelé for their knowledge of the regulatory framework of our market."
- "Strong expertise in competition law, availability, responsiveness."
- "Laurence Bary: Very competent, advice perfectly suited to our business sectors. Available and always very responsive."
Key clients
- Apple
- Chiesi Farmaceutici S.p.A
- Cora and Supermarchés Match
- Crown Holdings
- Deutsche Bahn AG
- Havea
- Laboratoire X.O.
- Roche
- Virbac
Work highlights
- Representing Virbac in a complaint before the European Commission related to a potential “killer acquisition”, which led to the first dawn raid conducted by the Commission post-Covid and to the formal opening of an investigation on 26 March 2024.
- Represented Apple before the Paris Court of Appeal to challenge the highest ever fine imposed by the French Competition Authority, and succeeded in securing a partial annulment and significant decrease of Apple’s fine by 66%, from €1.1 billion to €371.6 million.
- Represented Crown Holdings in cartel investigations both before the European Commission and the French Competition Authority, involving in particular non-price cartel allegations in a context of regulatory changes.
Lawyers

Practice head
The lawyer(s) leading their teams.
Mélanie Thill-Tayara