Mr Olivier Diaz > Gide Loyrette Nouel A.A.R.P.I. > Paris, France > Lawyer Profile

Gide Loyrette Nouel A.A.R.P.I.
15 rue de Laborde
Olivier Diaz photo

Work Department

Mergers & Acquisitions / Corporate


Admitted to the Paris Bar in 1990, partner Olivier Diaz has over 25 years’ experience in complex mergers and acquisitions, private equity operations, securities law and corporate law. His practice covers a wide variety of transactions, in particular public and private acquisitions, leveraged buyouts, joint ventures and corporate restructurings.

During his career, Olivier has worked with clients on the largest and most complex M&A transactions in France, particularly in industrial fields, such as telecoms, energy, financial institutions and the food industry. He also assists companies on complex governance issues and is regularly consulted by regulators on securities and corporate law issues.

Recognised unanimously as one of the most talented lawyers in the field of mergers and acquisitions, Olivier Diaz is regularly praised in the main international directories and by his peers as a great strategist, in particular as regards listed and non-listed operations.


Prior to joining Gide in which Olivier was previously partner from 1990 to 1998, he worked for two years at Linklaters (1998-2000), fourteen years at Darrois Villey Maillot Brochier (2000-2015) and three years at Skadden Arps Slate Meagher & Flom.


French, English


A graduate of Paris’ political sciences institute Sciences-Po (1985) and of HEC business school in Paris (1987), Olivier also holds a postgraduate degree (DESS) in international taxation from Paris XI University (1987).

Lawyer Rankings

France > Mergers and acquisitions

(Hall of Fame)

Olivier DiazGide Loyrette Nouel A.A.R.P.I.

Gide Loyrette Nouel A.A.R.P.I. is particularly active in the large and upper-mid cap market segments. The practice is well known for its work on cross-border transactions, leading on Total’s  acquisition of the Energías de Portugal’s portfolio of 2.5m customers and combined cycle power plants. Olivier Diaz, who is described as an ‘excellent technician‘ leads the department, specialising in acquisitions, leveraged buyouts, joint ventures and corporate restructurings. The team has deep bench strength, with key names including Charles de Reals, Julien David, Christophe Eck and Jean-Gabriel Flandrois. It was further strengthened by the arrival of Jean-François Louit  and Caroline Lan who joined from Mayer Brown in September 2019.

Paris > Fusions-acquisitions

Gide Loyrette Nouel A.A.R.P.I. s’illustre particulièrement dans des opérations de large et moyenne valorisations. Le cabinet dispose d’excellentes ressources pour le traitement des opérations internationales ; il est par exemple intervenu dans l’acquisition par Total du portefeuille de clients et de centrales à cycle combiné d’Energías de Portugal. La pratique est dirigée par  Olivier Diaz ;  un «excellent technicien» qui intervient dans des opérations d’acquisitions, de LBO, de partenariats et de restructuration d’entreprises. L’équipe dispose d’importants effectifs et compte pour principaux intervenants Charles de Reals, Julien David, Christophe Eck et Jean-Gabriel Flandrois , ainsi que Jean-François Louit  et Caroline Lan qui ont rejoint le cabinet en septembre 2019 en provenance de  Mayer Brown .

Paris > Private equity > LBO

Gide Loyrette Nouel A.A.R.P.I. assiste des fonds d’investissement, ainsi que des entreprises. Le cabinet intervient dans des opérations de LBO auprès de firmes de private equity. Les recrutements de Jean-François Louit  et de Caroline Lan   (ex Mayer Brown ) en août 2019 ont permis aussi au cabinet de s’adjoindre une nouvelle compétence dans l’accompagnement du management dans les opérations de private equity. Olivier Diaz  dirige la pratique.