Peltier Juvigny Marpeau & Associés combines strong advisory and contentious skills to handle high-profile and strategic competition matters at both French and European level. Merger control is a clear area of expertise for the team, which has recently represented a number of leading French-based multinationals before the FCA and EC in relation to complex transactions, while sensitive antitrust investigations and related litigation also make up a significant proportion of the firm’s caseload. Ning-Ly Seng, who particularly stands out for her strength in high-end merger control cases, leads the practice. Former practice co-head Thibault Reymond left the firm in May 2025.
Legal 500 Editorial commentary
Accolades
Client satisfaction
Testimonials
Collated independently by Legal 500 research team.
- "Ning-Ly Seng, partner, is my point of contact – always available and accessible, she provides concrete answers to the issues raised."
- "Ning-Ly Seng is an excellent leader in the competition field. She is knowledgeable, has great judgement, and outstanding client management skills. Simply put, she is among the best competition lawyers I have worked with.
- "Ning-Ly Seng: We greatly appreciate working with Ning-Ly Seng by our side."
- "A sharp and flexible team, which anticipates issues well and provides practical guidance."
- "Rodolphe Harasymczuk is a great up-and-comer and deserves special mention."
- "We appreciated, beyond the technical expertise of the team, their availability and flexibility. Great listening skills and adaptability to various client needs."
Key clients
- Casino, Guichard Perrachon (including Monoprix and C-Discount)
- Bolloré (including Bolloré Energy)
- VINCI (including VINCI Airports, VINCI Concessions, VINCI Energy)
- Vivendi
- Servier
- Boehringer Ingelhiem
- LVMH
- Orpéa
- Gerflor
- Snetor
- McDonald’s France
- Almaviva
Work highlights
Advised Bolloré SE on its strategic sale of Bolloré Logistics to CMA CGM.
Acted for Servier in its litigation against the European Commission.
Advised Vivendi in its strategic takeover bid over Lagardère.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Ning-Ly Seng
Other key lawyers
Rodolphe Harasymczuk