Laurent Ayache is co-head of the Regulatory Practice in the Firm’s Paris office. He advises clients on public, administrative and regulatory law, including issues in connection with competition and public-sector matters. He focuses his practice on government contracts (public procurements, public service concessions, public-private partnerships and government property leases), public corporations (governance, privatization and changes in status) and on antitrust and industry regulation issues. His practice also includes litigation related to regulated industries such as energy (electricity and gas), electronic communications, airports, transportation (railway, road and sea), public housing, drinking water and sanitization.

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  • Advised a French multinational company in a billion-euro tender relating to ultimate backup diesel motors for the entire fleet of French nuclear power plants
  • Advised a leading French airport group on the public and regulatory aspects of the transfer of state shares to the company that manages a regional airport
  • Represented a leading engineering company in connection with a bidding process for liquefied natural gas (LNG) vessels in Korea

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  • Legal 500, Recommended Lawyer, 2019


University of Paris II Panthéon-Assas, LLM (DESS), European Business Law, 2004
University of Paris I Panthéon-Sorbonne, LLM (DESS), Public Economic Law, 2003



Laurent Ayache

Insights & Events / Media

Paris, France / Speaking Engagements / May 18, 2018

Special Report / January 2017

Special Report / January 20, 2016

La Revue Contrats Publics No. 155 / June 2015

The Allotment of Award Procedures and Competition Law

Revue Concurrences / June 8, 2015

Private Enforcement - Evaluation du Dommage Concurrentiel

Revue Concurrences / May 2015

Predatory Practices by the Organizer of a Tender Offer for a Target ...

Revue de l'Union Euriopéenne / March 2014

Annual Chronicle of the Jurisprudence relative to State Aids in 2013 (Full Article ...

Pubblicazioni / February 23, 2015

A Legal Guide to Investing in France for Foreign Investors

Les revues Jurisclasseur - Contrats, Concurrence, Consommation / December 2014

Competition, Regulatory and Public Sector (full article in French)

Les revues JurisClasseur - Contrats, Concurrence, Consommation / July 15, 2014

Competition, Regulatory and Public Sector (full article in French)

Revue Banque & Droit / March, 2014

Nominations - Le Carnet

Magazine des Affaires / February - March, 2014

McDermott Will & Emery consolide son pôle de droit économique