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Mathieu Vignon



Vignon Mathieu
Mathieu Vignon



Mathieu's practice focuses primarily on advising on the tax aspects of structuring and executing mergers and acquisitions, internal restructurings, cross-border financings, investment funds and debt restructurings.

He also has significant experience advising on tax aspects of financial instruments, derivatives, fund structures, real estate, asset finance and leveraged finance transactions.

Mathieu is a recognized practitioner by « Best Lawyers » since 2014 in Tax Law

"Mathieu Vignon regularly assists financial institutions and corporates with tax advice in connection to acquisitions and debt restructurings. "Mathieu Vignon is extremely knowledgeable in tax matters and is able to succinctly describe the issues to non-tax professionals," explains one source, adding further: "He is very commercial and proactive in identifying issues and finding solutions.""
Chambers Global/Europe 2022 - France (Tax)

"Allen & Overy LLP has a strong transactional practice and a team with leading expertise in financial tax law through Mathieu Vignon who assists leading banks and investment funds with debt fund formation, capital markets and other financial transactions."
Legal 500 EMEA 2021 - France (Tax)

"Mathieu Vignon has in-depth knowledge of the tax aspects relating to finance and capital markets operations, including derivatives transactions, refinancing and fund structuring. One interviewee comments: "His advice is practical - it's not just tax advice, he's able to look at the case from a broader perspective."" 

Chambers Europe 2018 – France: Tax 

Leading Individual (Transactional / Corporate Tax) 
Legal 500 2022 - France (Tax)

Band 3
Chambers Global/Europe 2022 - France (Tax)

Mathieu is a recognised practitioner in Legal 500 2018.

Related articles

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Publications: 12 January 2023

OECD Pillars: Full steam ahead

2023 is set to be a year of change for the global tax landscape. After many years of negotiation, development and consultation, implementation of the OECD’s Pillar One and Pillar Two reforms to…

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News: 18 November 2022

Allen & Overy advises Ubisoft on its EUR470 million OCEANEs issuance

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News: 13 October 2022

Allen & Overy Paris advises the banking syndicate on Coface SA’s debt management exercise

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News: 06 October 2022

Allen & Overy advises on the financing of Technicolor Creative Studios spin-off

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Private Equity

Real Estate



52 avenue Hoche
75008 Paris

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Admitted to the Bar, New York, 2000

Admitted to the Bar, Paris, 1998


LL.M, International Taxation, New York University, 1999

Post Graduate Degree, Business and Tax Law, University of Paris I, Panthéon Sorbonne, 1996

Published work

  • Restructuration financière des groupes en période de crise: quelques réflexions fiscales, Les Nouvelles Fiscales N°1049, 1 July 2010, co-authored with David Affejee
  • Islamic bonds (sukuks), vers une solution française?, Revue trimestrielle de droit financier, May 2009, co-authored with Romain Pichot
  • Régime fiscal des opérations de titrisation: doutes et certitudes du cédant, Nouvelles Fiscales, September 2008, co-authored with Romain Pichot et Viviane Carpentier
  • Les nouvelles perspectives des GIE fiscaux, RTDF, June 2008, co-authored with David Affejee
  • The introduction of the trust into French law, Butterworths Journal of International Banking and Financial Law, June 2007, co-authored with Fabrice Faure-Dauphin and Sabah Boughida
  • Bank of Scotland : Comment la fraude à la loi peut–elle corrompre les cessions d’usufruit, Revue Trimestrielle de Droit Financier, April 2007, co–authored with Siamak Mostafavi
  • Traitement fiscal des swaps : la fin d’une source d’incertitudes ?, RTDF n°4, 2007, co-authored with David Affejee
  • La fiducie : un régime fiscal dont l’efficacité est conditionnée à l’ intervention de l’administration fiscale, RTDF n°2, 2007, co-authored with Chloë Sebaoun