Firm Profile > Peltier Juvigny Marpeau & Associés > Paris, France

Peltier Juvigny Marpeau & Associés
75002 PARIS

EU, competition and distribution Tier 1

Peltier Juvigny Marpeau & Associés' eight-lawyer team's expertise is sought after for handling the most complex and high-profile antitrust and merger control work before the French Competition Authority, the EU Commission as well as national and EU courts. The practice recently advised on several highly significant merger control files, including key matters in the mass retailing and renewable sectors. It assisted Vinci Airports in dealing with merger control procedures before the European Commission in relation to its 50.01% acquisition of Gatwick Airport in the UK. In the antitrust area, the practice acts for Servier and its subsidiary Biogaran in three high-profile domestic and EU cases regarding cartel and abuse of dominant position issues. The group also acted in a series of recent and long-term domestic antitrust cases and recently obtained several significant fine reductions for its clients before courts. The practice is co-headed by Olivier de Juvigny, Thibault Reymond and Ning-Ly Seng.


 ‘The team demonstrates sound legal knowledge and is very dedicated.’

‘The team is excellent, very committed, very practical and perfectly understands business matters at stake.’

‘The team is very available and responsive. It has excellent knowledge in competition law.’

‘Olivier de Juvigny is exceptional, close to clients, perfectly understands matters at stake and is very habile.’

‘Thibault Reymond demonstrates remarkable responsiveness, availability and pragmatism.’

‘Ning-Ly Seng shows great creativity and a high level of professionalism. She is very dedicated and provides thoughtful analysis to complicated issues.’

Key clients





Groupe Canal Plus

BNP Paribas





Searchlight Capital Partners

Naxicap Partners

Baring Private Equity Asia

Dispute resolution: Commercial litigation Tier 2

Peltier Juvigny Marpeau & Associés' Frédéric Peltier is highly experienced in representing companies and leading investment funds in strategic financial, corporate governance, corporate, M&A and securities disputes. He is involved in several of the market's ongoing landmark shareholders' disputes. Co-founding partner Arthur Dethomas left the firm to join Hogan Lovells (Paris) LLP.

Practice head(s):


‘The firm provides high quality and appropriately aggressive advice’.

Key clients


Intermediate Capital Group (ICG)

Apax Partners


Newfund Capital

Milleis Bank

Dispute resolution: Stock market litigation Tier 2

At Peltier Juvigny Marpeau & Associés, Frédéric Peltier has notable expertise acting for companies, investment funds, accounting firms and individuals in claims relating to stock-market public tender offers and other securities litigation and market abuse investigations. Peltier recently handled several landmark cases including achieving a successful outcome for a client in a high-profile insider dealing lawsuit. Co-founding partner Arthur Dethomas left the firm to join Hogan Lovells (Paris) LLP.

Practice head(s):

Key clients


Intermediate Capital Group (ICG)


BPIfrance and European Investment Fund


CIC and Crédit Mutuel Insurance Group

Barclays Bank Plc

Milleis Bank


Insolvency Tier 3

Peltier Juvigny Marpeau & Associés' Nicolas Partouche regularly assists judicial liquidators, but also advises investors, banks and debtors. He is involved in several highlight insolvency and restructuring matters and handles a good volume of smaller cases. Clients also increasingly turn to him for high-stake related strategic litigation.

Practice head(s):


‘A very well-organised and efficient team which provides key support in dealing with emergencies and complex situations.’

‘Nicolas Partouche is extremely close to his clients and cares about providing the best solutions possible to best suit his clients’ needs. He shows great pedagogical skills and keeps his clients well informed. He is rigorous, resilient, astute and creative and thrives to obtain the best results for his clients.’

Key clients



SELAS MJS Partners


Mr. Bernard Gnecchi

Mr. Edouard Hubsch and related entities (MFG, LOLA CREATION …)

Polycor Inc.


Beate Uhse Group



Employment Tier 4

Peltier Juvigny Marpeau & Associés

Practice head(s):


‘A responsive law firm which provides good quality work’.

‘The team provides a strong support. Team members show strong listening skills and responsiveness’.

Key clients

BNP Paribas


BMW France

BMW Finance

Banco Santander


Santander Consumer


Mergers and acquisitions Tier 4

Peltier Juvigny Marpeau & Associés

Practice head(s):


‘Very good professionals that immediately understand our needs and are able to deliver complex deals.’

‘Some brilliant partners like Benoit Marpeau and his very sharp thinking and going straight to the point.’

‘Real collaborative work between the firm and the client.’

‘Benoit Marpeau is reactive and a top qualify adviser. He is a future star in the market.’

Key clients

Altarea Cogedim



Indigo New


Altran Technologies

Compagnie des Alpes


Bridgestone Europe

Apax Partners

The firm: Dethomas Peltier Juvigny & Associés is an independent law firm created in 2013 by Arthur Dethomas, Frédéric Peltier, Olivier de Juvigny and Thibault Reymond, experienced partners from the best French and international firms.

The firm is dedicated to M&A transactions and to the resolution of complex matters. We advise our clients in strategic matters, essentially related to M&A and joint-ventures, competition and merger control, governance, shareholders’ disputes, and equity financing.

In 2015, Benoit Marpeau joined Dethomas Peltier Juvigny & Associés to reinforce the M&A practice. End of 2016, Ning-Ly Seng, who started her career in 2004 at Bredin Prat and became Counsel in 2015, joined the firm to strengthen the Competition practice. She was elected to partnership in 2018.

Areas of practice: M&A/corporate finance: This practice is at the heart of our Corporate team¡¦s activities, including acquisitions or capital increases involving public or private companies, and private equity transactions. Our practice deals with all matters encountered by companies, whether they concern governance, disputes between shareholders or between companies and their managers. We advise issuers, shareholders and management on regulatory issues specific to listed companies, notably for the preparation of complex general shareholders meetings. Our practice also acts in matters before the French Financial Markets Authority (“Autorite des Marches Financiers”) or criminal courts.

Merger control and antitrust/competition: Competition law has become a cornerstone in the strategy of companies; our firm dedicates to merger control and antitrust/competition issues three partners who are involved on a regular basis in major or legally challenging cases. Our Antitrust/Competition partners have high-standard reputation in French and European merger control, they assist clients in antitrust/competition litigations before French and European competition authorities and jurisdictions. Our practice also includes private enforcement cases and restrictive and unfair competition practices.

Litigation and arbitration: Our lawyers defend their clients’ interests in strategic corporate disputes. Their expertise is well recognized in the practice of company law, shareholder and governance disputes, as well as in stock exchange, financial and anti-competitive behavior litigation.

White-collar criminal law and proceedings before regulatory authorities: With its combined understanding of criminal procedure and knowledge of the business and financial world, our firm provides counsel to clients in economic and financial criminal law matters, particularly in cases of violation of stock exchange and competition regulations. The lawyers of our firm have a highly regarded practice in defense before the French Financial Markets Authority and the French and European Competition Authorities.

Photo Name Position Profile
 Aurélie Fournier  photo Aurélie Fournier Partner
 Benoit Marpeau  photo Benoit Marpeau Partner
 Nicolas Partouche  photo Nicolas Partouche Partner
 Frédéric Peltier photo Frédéric Peltier Partner
 Thibault Reymond  photo Thibault Reymond Partner
 Ning-Ly Seng  photo Ning-Ly Seng Partner
 Olivier de Juvigny  photo Olivier de Juvigny Partner

Under the responsibility of our co-head of the Antitrust Department, Ning-Ly Seng, the firm is involved in many diversity programs.

For instance, the firm partners with ViensVoirMonTaf and welcomes each year between 2 and 3 high school students from underprivileged neighbourhoods to carry out their compulsory discovery internship.

Ning-Ly is also part of several mentoring programs:

· Revel@Her promoting women from diverse backgrounds;

· the mentoring program of W@CompetitionFR with 16 other antitrust professionals (including the President of the French Competition Authority), mentoring youngest competition practitioners,

· Passeport Avenir, supporting during one full year a young student from underprivileged backgrounds by means of professional tutoring,

· HEC Incubator, supporting women entrepreneurs from diverse background to enter into HEC Incubator program (a tailored and participative start-up support program, now in partnership with Station F, one of the biggest European start-up campus).

The firm fiercely encourages the associates to participate and/or benefit from similar mentoring programs.