Avocat inscrit au Barreau de Paris depuis 1990, Olivier Diaz intervient depuis plus de 25 ans sur les fusions-acquisitions complexes, les opérations de private equity, le droit boursier et le droit des sociétés. Sa pratique couvre une vaste diversité de transactions, notamment des acquisitions publiques ou privées, acquisitions avec effet de levier, joint-ventures et restructurations d’entreprises.
Au cours de sa carrière, Olivier a accompagné ses clients sur des opérations de fusions-acquisitions parmi les plus importantes et les plus complexes de France, notamment dans les secteurs industriels, tels que les télécoms, l’énergie, les institutions financières et l’alimentaire. Il conseille également les entreprises dans le cadre de problématiques complexes de gouvernance et est régulièrement consulté par les régulateurs sur des aspects boursiers et de droit des sociétés.
Avant de retrouver le cabinet Gide dans lequel Olivier Diaz était associé entre 1990 et 1998, il a travaillé pendant deux ans au sein du cabinet Linklaters (1998-2000), quatorze ans au cabinet Darrois Villey Maillot Brochier (2000-2015) et trois ans au cabinet Skadden Arps Slate Meagher & Flom.
Diplômé de Sciences-Po (1985) et d'HEC Paris (1987), Olivier est également titulaire d’un DESS Fiscalité Internationale de l'Université Paris XI (1987).
Unanimement reconnu comme l’un des avocats les plus talentueux dans le domaine des fusions-acquisitions, Olivier Diaz est régulièrement distingué par les principaux classements internationaux (Chambers et Legal 500) et par ses pairs (Best Lawyers) comme un grand stratège notamment sur le segment des opérations cotées et non cotées.
« Olivier Diaz maintains a leading corporate practice and frequently acts on public M&A transactions. He is called upon by significant French clients to advise on domestic and international matters. Strengths: “He has built a brilliant team around him.” “We have worked with him for many years with complete confidence in his judgement, professional skills and integrity.” “Olivier Diaz's support to the company is invaluable. We have worked with him for many years with complete confidence in his judgement, skills and integrity.” “Olivier Diaz is at ease with complex situations. If it is too easy, he is not interested. This is very reassuring for his clients. He can calm everyone down in a deal and focuses on the right thing. He is very experienced; you can feel that.” “I am always confident when I have Olivier Diaz on my team. What I like about him is that he commits and is able to take decisions and owns up to them, which is very valuable.”»
Chambers Europe & Global 2024 - Corporate / M&A : High-end Capability
« Practice head Olivier Diaz is one of the market’s star names for LBOs, public and private acquisitions, joint ventures and corporate restructurings. »
Legal 500 EMEA 2023 - Mergers & Acquisitions
« Olivier Diaz maintains a leading corporate practice and frequently acts on public M&A transactions. He is called upon by significant French clients to advise on domestic and international matters. Strengths: "Olivier Diaz is absolutely brilliant; he is a real strategist. I trust his judgement completely." "He is very experienced and smart." »
Chambers Europe & Global 2023 - Corporate / M&A: High-end capability
« The team led by Olivier Diaz, perfectly assisted by Charles de Réals, presents the best combination of technical excellence and experience. »
Leal 500 EMEA 2022 - Mergers & Acquisitions
« Its M&A department has been particularly busy in the retail, healthcare and life sciences, financial and retail industries of late and is helmed by Olivier Diaz, a lawyer with 25 years’ worth of experience in public and private acquisitions, joint ventures, leveraged buyouts and corporate restructurings. »
Leal 500 EMEA 2022 - Mergers & Acquisitions
« Olivier Diaz maintains a leading corporate practice and frequently acts on public M&A transactions. One satisfied client comments: "I am happy every day to work with Olivier Diaz. He is extremely brilliant, while being accessible and humble." »
Chambers Europe & Global 2022 - Corporate / M&A: High-end capability
« Olivier Diaz is an excellent technician, a very fine negotiator and appreciated by CEOs for his work combining both business and law. »
Legal 500 EMEA 2021
« Olivier Diaz maintains a leading corporate practice and frequently acts on public M&A transactions. Clients highlight his longstanding presence in the market, saying: 'He knows the French institutions and regulators very well,' and going on to add: 'He is very quick on his feet, he is business-oriented, pragmatic, he is a highly trusted adviser who brings more than technical expertise.' »
Chambers Europe & Global 2021