Grégoire Andrieux focuses on mergers and acquisitions, with a particular focus on leveraged buyouts (LBOs).

Grégoire has extensive experience representing private equity institutions, family shareholders and entrepreneurs on domestic and cross-border acquisitions, (re)financings, divestitures, build-ups and debt restructurings.

Grégoire has a particular expertise in transactions in the healthcare, FIG and TMT sectors.

Grégoire is particularly recognized for his dealmaking and constructive approach. His clients highlight his legal skills, business sense and availability.

Grégoire heads the Paris office.


  • Chambers Europe 2021, Band 3 in Private Equity: Mid-market
  • Legal 500 EMEA 2021, Leading Individual
  • Mergermarket M&A Deals, Highlighted Individual, 2020
  • The Best Lawyers in France 2022, Corporate Law


University of Texas at Austin, LLM, 2003
University of Paris I Panthéon-Sorbonne, LLM, Business Law, cum Laude, 2002
University of Nantes, Maîtrise en Droit, summa cum laude, 2001
University of Nantes, Licence en Droit, cum laude, 2000

New York

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Grégoire Andrieux

Insights & Events / Media

Two Day Virtual Event / McDermott Event / June 23-24, 2021

London, United Kingdom / McDermott Event / October 4, 2018

Paris, France / Speaking Engagements / May 17, 2018

Chicago, Illinois / McDermott Event / September 28, 2017

San Francisco, California / McDermott Event / January 10, 2017