Christophe Lemaire is a partner in our antitrust, regulatory and trade and EU law practice
Christophe heads the competition and EU law department of the Paris office.
His practice focuses on all aspects on EU and French competition law. He has recognised expertise in advising French and international companies on anti-competitive practices, merger control, state aid, damages claims and the control of subsidies and foreign investment. He regularly advises clients before national and European competition authorities and courts.. He also represents clients before the sector-specific regulatory authority, in particular in the energy, transport and media sectors.
Christophe was Rapporteur permanent and Counsel for European Affairs at the French Competition Council (2003 - 2006). He worked in the legal department of the French Ministry for Foreign Affairs (Community and international economic law division) where he was in charge of competition affairs and network industries, in particular representing the French government before the Court of Justice (2002 - 2003).
In 2003, Christophe published his thesis on the liberalisation of the energy sector in Europe. He is also Senior Lecturer in French and European competition law and regulatory law at the Sorbonne Law School (University of Paris I Panthéon Sorbonne). He is also co-chair of the Master 2 in Economic law of the European Union.
Christophe is a member of the Paris Bar.
Latest thinking
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Quickguides
Competition law investigations by the European Commission
This Quickguide summarises the procedure followed by the European Commission.
06 May 2026
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Quickguides
Overview of EU competition law
05 May 2026
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Quickguides
EU merger control
This Quickguide provides an overview of the EU merger control regime.
05 May 2026
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Quickguides
Dawn raids: dealing with inspections by European competition authorities
05 May 2026
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Legal development
A world of opportunity - Foreign investment in Europe
25 Mar 2026
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Legal development
The high price of luxury fashion: €157 million fines for RPM
17 Oct 2025
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Legal development
Simplified State aid rules to spur the Clean Industrial Deal
04 Jul 2025
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Legal development
4th Annual Report on the EU FDI Screening Regulation
31 Oct 2024
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Legal development
Financial Services SpeedRead: 1 November 2023 edition
01 Nov 2023
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Legal development
European Commission publishes FSR Implementing Regulation
13 Jul 2023
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Podcasts
Episode 3, Competition Law and Foreign Investment in 2023 – EU Foreign Subsidies Regulation
10 May 2023
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Legal development
Managing the impact of the new Foreign Subsidies Regulation
21 Feb 2023
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Latest news, deals and awards
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News Ashurst advised Octopus Energy Generation on the acquisition of a 49.9% stake in a 107 MW onshore wind farm portfolio in France
27 Apr 2026
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News Ashurst advises Enagás on its agreement to acquire a 31.5% stake in Teréga
23 Apr 2026
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News Ashurst advises senior lender pool in restructuring of Segula group
26 Feb 2026
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News Ashurst advises Investcorp on minority GP stake in Vauban IP
13 Nov 2025
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News Ashurst Advises a Banking Pool on the Financing of Helexia
30 Sep 2025
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News Ashurst advises Octopus Energy Generation in connection with the expansion of FFNEV's activities into France
17 Mar 2025
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News Ashurst advises Octopus Energy Generation on the acquisition of OX2 France
22 Jan 2025
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News Ashurst represented the bondholder's steerco on Onepoint consortium's successful bid over Atos
25 Nov 2024
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News Ashurst Advises LONGi Solar on Foreign Subsidies Regulation Investigation
14 May 2024
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News Ashurst advises Bpifrance and La Banque Postale on a c. 90 million refinancing of 350 rooftop solar PV located in 4 European countries
04 Jul 2023
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News Ashurst advises Balyo on SoftBank Group's proposed tender offer for 100% of Balyo's share capital
20 Jun 2023
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