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Guillaume Isautier



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Guillaume Isautier



Guillaume is a partner in the Mergers & Acquisitions practice in France. He advises domestic and international clients in a wide variety of M&A transactions, including purchases and sales of listed and non-listed companies, strategic mergers and joint ventures, as well as business carve-out acquisitions and divestitures.

His practice focuses on a broad range of industry sectors including banking, telecom, energy and consumer good & retail sectors. He also regularly represents private equity funds.

Legal 500 EMEA 2023 - France (Mergers & Acquisitions)

“What I really appreciate beyond his legal skills, which were excellent, is that he is someone who is very pragmatic and knows how to guide his clients.”

“Guillaume Isautier is one of my go-to lawyers. He knows us well, understands how we work and is always prepared for all situations.”
Chambers Global/Europe 2023 - France (Corporate/M&A)

Highly regarded 
IFLR 1000 2022 - France (Private Equity, Mergers & Acquisitions)

“Guillaume Isautier is a very good negotiator”
Chambers Europe 2022 - France (Corporate/M&A)

"Guillaume Isautier successfully manages to combine a remarkable work force, protection of the interests of his clients, a very appreciable relational mode in terms of interactions and availability, all at very competitive prices."
Legal 500 EMEA 2022 – France (Mergers & Acquisitions (M&A)

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Guillaume Isautier

News: 14 March 2023

Allen & Overy strengthens corporate practice in Paris with new partner hire

Paris – Allen & Overy (A&O) is pleased to announce the appointment of Guillaume Isautier on April 3rd as a partner in its Corporate practice in Paris.

Read more Allen & Overy strengthens corporate practice in Paris with new partner hire



32 rue François 1er

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Admitted to the Bar, Paris, - 2000


Post Graduate Degree, International Commercial Law – University Paris X, Nanterre – 1998

LL.M, Taxation – Golden Gate University, San Francisco – 1997