Antitrust

Antitrust

Our expertise

Competition law is a key challenge for companies as it has a major impact on their operations:

  • Heightened powers for competition authorities (including investigative powers, injunctions and interim measures.
  • Increasingly high fines for breaches
  • Implementation of negotiated or alternative solutions to standard sanctions proceedings, such as leniency, settlement and commitments, requires sharp strategic analysis of the issues at stake.
  • Simplifying and increasing private enforcement action in response to the drive by EU legislation.

 

The task of evaluating the anti-competitive and consequently sanctionable nature of practices considered by companies or behaviour already in place on the given market is very sensitive, given the competition rules on cartels or abuse of dominant position and how they connect with other issues (regulatory, intellectual property, etc.). Similarly, litigation brought before the competition authorities is a strategic move, given the financial and reputational stakes involved.

 

Magenta provides bespoke support to companies facing issues involving competition law, via the following services:

  • Analysing the legality of some commercial practices implemented or considered in the development of clients’ operations, or carried out by competitors.
  • Assisting with competition investigations and litigation, whether as a claimant or defendant, before the competition authorities and/or European or national courts.
  • Setting up compliance programmes, training legal and commercial teams, as well as conducting audits and simulating dawn raids.

Our work

Assisting a group specialising in nuclear plant decommissioning in cartel proceedings before the French Competition Authority.
Assisting several companies in competition investigations, particularly in the electrical goods, and construction and civil engineering sectors.
Assisting a leading group in the premium tea sector in cartel proceedings before the French Competition Authority.
Assisting a leading group in the toy sector in commitment proceedings before the French Competition Authority.
Assisting and representing several companies in proceedings for abuse of a dominant position proceedings in the electronic communications sector.
Assisting and representing a maritime company in commitment proceedings before the French Competition Authority.
Obtaining the partial cancellation of a sanction imposed by the French Competition Authority.

State Aid

Issues relating to state aid may arise in various situations, such as the implementation of sector-specific emergency plans or safeguarding measures targeting one or more companies, or the financing of services of general economic interest, R&D projects or infrastructure development projects using public funds or preferential tax mechanisms.

To avoid being required to reimburse public funds if they prove to constitute unlawful state aid, companies must pay very careful attention to the mechanisms available to them to directly or indirectly benefit from public funds.

Conversely, companies that contribute to such measures or that are harmed competitively by the implemented mechanism may wish to challenge it (including to obtain reimbursement of the contributions charged to them).

Magenta has a comprehensive understanding of these rules and can assist clients to ensure that the mechanisms granted to them do not risk being classified as state aid. Magenta can also assist clients who wish to challenge the legality of a mechanism they consider to be unlawful.

Our work

Helping a public service company develop new commercial operations and comply with applicable state aid rules.
Assisting a central government department in assessing the compliance of various development initiatives with the right to state aid.
Assisting a consortium in concluding a public-private partnership with a French public institution which may include state aid.
Litigation before the administrative courts, enabling several companies to obtain reimbursement of taxes classified as state aid.
Assisting a leading air transport operator in filing a complaint with the European Commission for breach of the right to state aid under the French airport tax rebate mechanism provided by Article 1609 quatervicies of the French General Tax Code.

Private enforcement

Magenta is particularly active in private enforcement and supports clients, whether they are claimants or defendants, in this type of litigation. Economic consulting firms provide additional support.

Our work

Assisting and representing several companies as claimant or defendant in private enforcement proceedings (compensation claims ranging from €5 to €70 million) in the telecoms, rail transport and pharmaceutical sectors.
Assisting a telecoms operator in proceedings brought against a competitor for disparaging its offering and network quality.

Our rankings

Sylvain Justier is recognised for his expertise in handling investigations into alleged cartels and other anti-competitive practices, as well as merger control cases.
Chambers & Partners 2026
Competition / European Law

Rank : Band 4

Magenta Société d’Avocats is a boutique firm with a focus on contentious competition mandates, advising clients on both public and private enforcement cases. The firm frequently represents clients before the FCA and the commercial courts. The lawyers have experience handling anti-competitive behaviour and cartel matters, as well as distribution law issues. In addition, it assists with merger control filings and competition law compliance issues. The law firm is recognised for a particular know-how in the transportation sector, with further experience in the consumer goods industry.

Chambers & Partners 2026
Competition / European Law

Magenta, qui intervient sur l’ensemble du spectre du droit économique, de l’antitrust au droit de la distribution, en passant par le contrôle des concentrations et les aides d’État, accompagne ses clients devant les autorités administratives et judiciaires, y compris étrangères, dans le cadre de dossiers transfrontaliers.

Le cabinet peut se prévaloir d’être très actif dans les secteurs régulés, en particulier les télécoms, les transports, l’énergie et le pharmaceutique où il assiste une clientèle de renom à la fois en concurrence, en distribution et sur les questions réglementaires. Les membres de l’équipe sont également reconnus pour leur approche pragmatique des affaires qu’ils suivent.

2026 Rankings: 

Décideurs 2026
Economic law & European affairs

Sylvain Justier, Vincent Jaunet and Gaël Hichri lead the team at specialist competition, regulatory and public law boutique Magenta, which has an excellent reputation for representing clients in highly regulated sectors including telecoms, transportation, energy and pharmaceuticals. The firm houses a broad practice, with experience across the full range of merger control filings, cartel and abuse of dominance cases, follow-on damages claims, and state aid issues. Distribution law, including disputes between distributors and suppliers, is another area of expertise.

Legal500 2025
EU, competition and distribution

‘The Magenta team stands out due to knowing the regulated sectors extremely well. The firm has the enormous advantage of having very detailed technical knowledge of competition law and also of being able to give in-depth advice on economic subjects. Magenta also demonstrates great responsiveness to our requests which are sometimes made at the last minute.’

Legal500 2024
EU, competition and distribution

Magenta Société d’Avocats is a boutique firm with a focus on contentious competition mandates, advising clients on both public and private enforcement cases. The firm frequently represents clients before the FCA and the commercial courts. The lawyers have experience handling merger control, anti-competitive behaviour and cartel matters, and distribution law issues. The law firm is recognised for a particular know-how in the telecommunications sector, with further experience in the consumer goods industry.

Chambers & Partners 2024
Competition/European Law

Sylvain Justier is recognised for his expertise handling cartel investigations, follow-on damages litigation and merger control cases. He often leverages his skill for the benefit of companies in the telecoms sector.

Chambers & Partners 2023
Competition/European Law