Of Counsel

París +

With more than 10 years of experience, Eileen Lagathu has gained significant exposure in all aspects of EU and French competition law, from merger control to State aid and cartel investigations by the European Commission or the French Competition Authority. She has represented clients in numerous litigation proceedings before the General Court, the European Court of Justice, and the Paris Court of Appeal in landmark cases that have contributed to shaping the case law on fines.

She assists clients daily with their commercial agreements, including R&D and exclusivity arrangements, and, more generally, in structuring their distribution networks. She also assists clients in establishing compliance measures.

Eileen regularly advises global corporations on the merger control aspects of their transactions (asset or share deals, joint venture creations) as well. She regularly works on notifications to the European Commission or the French Competition Authority and coordinates multijurisdictional filings.

Eileen's experience representing clients in the energy, pharmaceutical, banking, and financial sectors has given her an in-depth understanding of these industries.

Eileen is particularly knowledgeable on the subject of fines and since 2013 has been coauthor of the yearly survey on the Law on Fines Imposed in EU Competition Proceedings, published by JECLAP (Oxford academic).


  • Sanofi acquires leading Colombia pharmaceuticals manufacturer GenfarJones Day advised Sanofi in the acquisition of Genfar S.A., a leading pharmaceuticals manufacturer headquartered in Bogota, Colombia.
  • French oil institute IFP wins favorable EU General Court ruling in State aid caseFor several years Jones Day's client Institut Français du Pétrole (IFP), the French oil institute, has defended claims by the European Commission that it has benefitted from illegal State aids.
  • GM sells Strasbourg plant to Punch Metals International N.V.Jones Day advised General Motors Company in connection with the sale of its Strasbourg plant to Punch Metals International N.V.
  • Five Arrows Managers and Luxempart acquire units of FCPR Acto and FCPR Acto Capital II from GroupamaJones Day advised Five Arrows Managers and Luxempart in connection with their acquisition of units of FCPR Acto and FCPR Acto Capital II from Groupama SA, a provider of insurance, banking, and financial services.
  • USG completes sale of European businesses to Gebr. Knauf Verwaltungsgesellschaft KGJones Day advised USG Corporation, a manufacturer and distributor of building materials, in connection with its sale of wholly-owned European business operations to Gebr. Knauf Verwaltungsgesellschaft KG, through its subsidiaries, a producer of building materials.
  • Total wins landmark victory against EC position on parent company liability in competition law caseAs lead European competition counsel for Total SA and its subsidiary Elf Aquitaine SA, Jones Day persuaded the Court of Justice of the European Union to overturn lower court judgments finding Elf Aquitaine liable in a cartel case.
  • Rhodia SA sells acetylsalicylic acid, salicylic acid and other esters activities to NovacapJones Day advised Rhodia SA in its sale of acetylsalicylic acid, salicylic acid, and other esters activities to Novacap.
  • GM purchases GM Strasbourg in the framework of conciliation proceedingsJones Day has advised General Motors Automotive Holdings, S.L. and General Motors Holdings LLC on the occasion of the purchase of the entirety of the share capital of their former facility, General Motors Strasbourg S.A.S (GM Strasbourg).
  • Procter & Gamble acquired Ambi Pur, the air care business of Sara Lee, for $470 millionJones Day advised The Procter & Gamble Co. ("P&G") in its purchase of Sara Lee's Ambi Pur Business for EU 320 million ($470 million).
  • Rhodia acquires specialty surfactants manufacturer McIntyre GroupJones Day advised Rhodia SA in its acquisition of McIntyre Group, Ltd., a global manufacturer of specialty surfactants.