Contact details

Jean-Julien Lemonnier

T: +33 1 44 15 80 78 M: +33 6 61 76 74 57 Email Jean-Julien | vCard Office: Paris

Jean-Julien Lemonnier Partner

Contact details

Jean-Julien Lemonnier

T: +33 1 44 15 80 78 M: +33 6 61 76 74 57 Email Jean-Julien | vCard Office: Paris

Jean-Julien Lemonnier is the partner in charge of the competition practice in Paris.
  • Profile
  • Services
  • Sectors

He has a broad competition practice. He regularly advises clients involved in investigations concerning alleged anti-competitive practices instigated by the French competition authority and the European Commission, as well as assisting clients involved in EU and multijurisdictional merger control filings.

He also advises on the implementation of compliance programs and on distribution law issues. He has developed an expertise on internal investigations not only in competition law but also beyond, in particular white collar.

He has extensive expertise in the financial sector, ports, luxury goods, consumer products, animal foods, food and beverage, and chemical sectors.

Jean-Julien regularly publishes articles and academic papers in the field of competition law. He is also often invited to speak at conferences and trainings.

Prior to joining Stephenson Harwood, Jean-Julien was Counsel in the competition practice of an international well-known law firm in Paris.

Jean-Julien speaks French and English and is a member of the Paris Bar.

  • Competition

Advising a client in the context of a cartel investigation by the French Competition Authority in the port handling sector.

Advising a leading animal nutrition company in the context of an investigation conducted by the French Competition Authority for alleged vertical restraints.

Advising a leading industrial group of cosmetics and perfumes products in the context of an investigation conducted by the French Competition Authority for alleged vertical restraints.

Advising a leading coffee company in the context of an investigation conducted by the French Competition Authority on alleged abuse of dominant position.

Advising one of the leading French banks in the context of an investigation conducted by various international competition authorities in the interest rate derivatives sector (notably Euribor).

Advising a leading French bank in the context of the market study of the European Commission in the banking syndication sector.

Advising a leading French bank in the context of internal investigations implemented for the need of an OFAC remediation plan.

Advising a client active in the equipment rental sector in the implementation of a compliance program comprising the setting up of a competition charter, an e-learning and trainings.

Assistance to an operator active in the spirits market in the context of a merger between two of its main competitors.

Advising a client in the context of an asset transfer and merger control in Asia.

Advising a client active in the DIY sector in the context of the notification of a merger operation in France.

Advising a sugar producer in the context of several merger operations in France and before the European Commission (including a Phase II operation and an operation giving rise to commitments).

Advising a packaging producer in the notification of a merger in France.

Advising a leading refrigerated transport client in the context of a notification of a merger before the French Competition Authority. 

Advising a client active in the rental of construction equipment sector in the context of the notification of a merger operation to the French Competition Authority.

Advising a client active in the trade fair business in the context of a merger operation having given rise to a in-depth analysis in France (phase II).

Advising an operator active in the chemicals sector in the context of the notification of a merger operation to the European Commission.

Intervention in the framework of a professional association: training and awareness-raising on competition law.

Advising a leading French bank in the context of a large-scale internal investigation following investigations conducted by authorities in the derivatives sector.

Advising a leading advertising company in the context of an internal investigation in connection with an investigation conducted by a foreign authority.  

  • Consumer
  • Banks and banking

Advising a leading industrial group of cosmetics and perfumes products in the context of an investigation conducted by the French Competition Authority for alleged vertical restraints.

Advising a leading coffee company in the context of an investigation conducted by the French Competition Authority on alleged abuse of dominant position.

Assistance to an operator active in the spirits market in the context of a merger between two of its main competitors.

Advising a client active in the equipment rental sector in the implementation of a compliance program comprising the setting up of a competition charter, an e-learning and trainings.

Advising a client active in the DIY sector in the context of the notification of a merger operation in France.

More: Consumer

Advising one of the leading French banks in the context of an investigation conducted by various international competition authorities in the interest rate derivatives sector (notably Euribor).

Advising a leading French bank in the context of the market study of the European Commission in the banking syndication sector.

Advising a leading French bank in the context of internal investigations implemented for the need of an OFAC remediation plan.

Advising a leading French bank in the context of a large-scale internal investigation following investigations conducted by authorities in the derivatives sector.

More: Banks and banking

Latest news & insights

29 Mar 2021

From News

Jean-Julien Lemonnier joins Stephenson Harwood as partner

Law firm Stephenson Harwood LLP has grown its competition capabilities with the arrival of partner Jean-Julien Lemonnier, who joins the firm in Paris.

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© Stephenson Harwood LLP 2016. Any reference to Stephenson Harwood in this document means Stephenson Harwood LLP and/or its affiliated undertakings. Any reference to a partner is used to refer to a member of Stephenson Harwood LLP.