Firm Profile > Delsol Avocats > Lyon, France

Delsol Avocats
69001 LYON

The regions Tier 1

Founded in Lyon, Delsol Avocats has built itself a great reputation at national level. The firm fields a total of some 120 lawyers who are based in Lyon and Paris. The Paris office has grown significantly these past few years and now houses most of the workforce. The firm impresses with a large array of business law expertise, spanning corporate, tax, and employment law as well as litigation. It serves many small and medium-sized enterprises, investment funds, entrepreneurs and several large companies. In addition, the firm is one of the market’s stand-out advisors for non-profits and foundations, thanks to Xavier Delsol, founding partner and chairman of the firm.

Practice head(s):

Xavier Delsol 

Construction Tier 2

Delsol Avocats advises prestigious companies such as luxury goods and hotel brands. The practice offers full-service expertise, handling advisory work and disputes. In addition, the team also assists developers and offers commercial property lease expertise. Nathalie Peyron and Benoit Boussier lead the practice and of counsel Virginie Delannoy is also a notable team member.

Practice head(s):

Nathalie Peyron; Benoit Boussier 

Other key lawyers:


‘Benoit Boussier knows the construction industry very well’.

Data privacy and data protection Tier 3

At Delsol Avocats, practice head Jeanne Bossi Malafosse has a unique portfolio of experience, with eighteen years of experience at the French data protection authority and five years of experience at the French digital health agency ASIP, Bossi Malafosse is an expert in data protection law in the healthcare and life sciences sector. The practice's client roster attests to this specialism, with a number of domestic professional healthcare associations and international pharmaceutical companies on the client list. GDPR and data protection compliance programmes, data privacy assessments and the drafting of data protection policies account for the majority of the team's workload.

Practice head(s):

Jeanne Bossi Malafosse

Key clients

Conseil National de l’Ordre des Médecins

Conseil National de l’Ordre des Pharmaciens

Industry focus: Healthcare and life sciences Tier 3

Delsol Avocats' Jeanne Bossi Malafosse is particularly proficient in advising leading pharmaceutical and healthcare companies and professional bodies on data and e-healthcare issues. She is acting as data protection officer for several of her clients. The practice's second key member is Thomas Roche who has particular know-how in the field of regulatory and clinical research. He advises several leading industry players as well as smaller laboratories.

Practice head(s):

Jeanne Bossi Malafosse; Thomas Roche

Key clients





Private equity: venture/growth capital Tier 3

Delsol Avocats

Practice head(s):

Henri-Louis Delsol; Philippe Dumez; Pierre Gougé; Emmanuel Kaeppelin; Philippe Malikian; Amaury Nardone


‘This team gives us confidence and always treats our request on time.’

‘The Delsol team knows how to establish a climate of trust with its customer: high availability, high responsiveness. They know how to move the issues forward positively and find solutions, the partners are strongly involved throughout the mission. They know how to build a long-term relationship of trust. Listening to the customer, understanding the issues, high technical skills, ability to work in a network, perfect mastery of the Anglo-Saxon environment. Strong bargaining ability.’

Key clients



Quilvest Private


Romande Energie



Winerie Parisienne



Aster capital


Winerie Parisienne

Employment Tier 4

Delsol Avocats

Practice head(s):

Delphine Bretagnolle ; Philippe Pacotte ;Camille Rousset ; Elsa Lederlin


‘The team is available, skilled and dedicated’.

‘Philippe Pacotte is committed and provides high quality advice’.

Key clients






Mergers and acquisitions Tier 5

Delsol Avocats

Practice head(s):

Henri-Louis Delsol; Philippe Dumez; Pierre Gougé; Emmanuel Kaeppelin; Philippe Malikian; Amaury Nardone


‘Friendly mindset which helps a lot in negotiation.’

‘Value for money.’

Highly skilled.

Key clients





Domaine Henri



EDH et Quilvest

Private Equity



Inicea Holding







Tax Tier 5

Delsol Avocats

Practice head(s):

Mathieu Le Tacon; Frédéric Subra; Julien Monsenego


‘The team responds very quickly and provides tailored answers. They are proactive and give clients the feeling that they are in good hands’

‘Julien Monsenego is very considerate, has thorough knowledge of French tax law and is highly available’

Key clients

Capitem Partenaires





Olympique Lyonnais


Warner Music

The firm: Although created in 2003, DELSOL Avocats has been established in the French legal landscape for more than forty years. Forty years marked by constant growth. Since then, DELSOL Avocats, as a full service law firm, has developed new teams, which actively co-operate to form multidisciplinary practice groups in order to address complex transactions, bring them to success and, generally speaking, provide the most appropriate assistance to their clients.

Areas of practice: DELSOL Avocats is a firm of expert lawyers covering not only a number of specialist fields but also very diverse sectors. In the short, medium, and long term the firm offers support to economic and social players during their national and international operations – whatever the level of risk.

DELSOL Avocats helps managers and decision-makers develop potential courses of action in high-risk situations and optimize their decision-making. To achieve this, DELSOL Avocats shares its clients’ economic, sectorial, financial, and managerial culture and establishes high quality relationships.

Department Name Email Telephone
Employment law - Social welfare law Delphine BRETAGNOLLE +33 4 72 10 20 30
Not-profit organisations - social and solidarity-based entrepreneurship Laurent BUTSTRAEN +33 4 72 10 20 30
Dispute resolution Alexis CHABERT +33 4 72 10 20 30
Public law Renaud-Jean CHAUSSADE +33 4 72 10 20 30
Corporate - mergers and acquisitions Jean-Philippe DELSOL +33 4 72 10 20 30
Not-profit organisations - social and solidarity-based entrepreneurship Xavier DELSOL +33 4 72 10 20 30
Corporate - mergers and acquisitions Philippe DUMEZ +33 4 72 10 20 30
Dispute resolution Pierre-Marie DURADE-REPLAT +33 4 72 10 20 30
Corporate - mergers and acquisitions Emmanuel KAEPPELIN +33 4 72 10 20 30
Life sciences Thomas ROCHE +33 4 72 10 20 30
Employment law - Social welfare law Camille ROUSSET +33 4 72 10 20 30
Tax law Frédéric SUBRA +33 4 72 10 20 30
Tax law Paulette TRILLAT +33 4 72 10 20 30
Photo Name Position Profile
 Delphine Bretagnolle  photo Delphine Bretagnolle Delphine BRETAGNOLLE is a partner lawyer in the LYON office’s Employment –…
 Laurent Butstraën  photo Laurent Butstraën Laurent BUTSTRAËN is co-head of the “Non-Profit Organizations – Social and solidarity-based…
 Alexis Chabert  photo Alexis Chabert CHABERT is the co-head of the Litigation Department. A specialist in legal…
 Renaud-Jean Chaussade  photo Renaud-Jean Chaussade He has developed recognized expertise in: – property law and public-sector contracts…
 Jean-Philippe Delsol  photo Jean-Philippe Delsol Jean-Philippe DELSOL, a tax lawyer, is co-head of the Corporate Law –…
 Xavier Delsol  photo Xavier Delsol Xavier DELSOL is the founder and co-head of the Non-Profit Organizations Department.…
 Philippe Dumez  photo Philippe Dumez Philippe DUMEZ is co-head of the LYON office’s Corporate Law – Mergers…
 Pierre-Marie Durade-Replat  photo Pierre-Marie Durade-Replat Pierre-Marie DURADE-REPLAT is co-head of the LYON office’s Litigation Department. He manages…
 Emmanuel Kaeppelin  photo Emmanuel Kaeppelin Emmanuel KAEPPELIN is co-head of the Corporate Law – Mergers and Acquisitions…
 Thomas Roche  photo Thomas Roche Thomas ROCHE is co-head of the Life Sciences Department. He assists health…
 Camille Rousset  photo Camille Rousset Camille ROUSSET is co-head of the Lyon office’s Employment Law – Social…
 Frédéric Subra  photo Frédéric Subra Alongside standard services in tax law (repeat advisory work and litigation management),…
Ms Paulette Trillat photo Ms Paulette Trillat Paulette TRILLAT is co-leader of the “Tax Law” department in LYON. She…
Partners in the Lyon office : 13
Lawyers in the Lyon office : 50+
The Parlex Group



TESTIMONIAL: In February 2018, Proactis launched a public tender offer for shares in the company Hubwoo. DELSOL Avocats guided Proactis through the process and made it possible to complete the transaction successfully. The team was attentive to the problems likely to affect Proactis and advised us based on our interests whilst coordinating the other advisors involved, going beyond the cultural and language differences. I was struck by how easily DELSOL Avocats adapted, not hesitating to put in place innovative solutions when the context allowed. The key to success is, for me, good communication between and within the various teams involved. That’s what DELSOL Avocats brought, and with Brexit in the background that wasn’t an easy task! Technically and operationally, the services provided exceeded our expectations.



TESTIMONIAL: DELSOL Avocats assisted us when our investor acquired an equity stake, when we had to ensure that the terms of the shareholders’ agreement were right for our specific situation. We felt totally guided through managing the transaction.



TESTIMONIAL: Our company has formed a close, trust-based relationship with DELSOL Avocats, which has assisted us with many corporate/M&A, contractual and litigation issues for almost ten years. The cases are handled efficiently, accurately and responsively with a good understanding of business challenges.



TESTIMONIAL: The added value DELSOL Avocats provides over other law firms we have consulted is the overview they take of the case, not confining themselves to purely financial considerations. In such a context, while we may be defending the employer’s interests, we are also keen to learn lessons as regards risk prevention. We especially appreciate the continuity of our relations with the team members, thanks to their low turnover.



TESTIMONIAL: We see our working relationship with DELSOL Avocats as a true partnership, built up on both sides through regular reviews and weekly dialogue.

An information-sharing platform has been introduced to give us direct access to our data. This real-time dispute reporting tool is invaluable, making our work easier and giving us full transparency.

Fast responses from teams who have no hesitation in giving their opinion is yet another advantage of working with DELSOL Avocats.

DELSOL Avocats’ international strategy relies on :

  • qualified teams from top French and foreign universities and schools, operational in various languages and registered with foreign bars.
  • extensive experience in negotiating and drafting international contracts.
  • access to reliable networks representatives renowned in their fields of expertise and sectors.

DELSOL Avocats assists its clients facing international issues, either French clients with international projects or foreign clients involved in operations in France. We are able to :

  • coordinate their projects (multi-country due diligence or acquisition of targets operating in several countries)
  • help them understand international (for our French clients) and French (for our international clients) legal practices and assist them in negotiating and drafting investment contracts and industrial or business partnerships
  • settle litigation or pre-litigation issues
  • act as an intermediary for their own international advisors.

DELSOL Avocats is an active member of two international networks (TELFA and PARLEX) and has therefore made strong connections with their « best-friend » located in Europe, the USA, South America, Asia, Africa and the Middle East. There are now nearly 100 law firms, or about 7000 lawyers around the world.

DELSOL Avocats has built on the proximity of his Lyons office with Italia to create an « Italian desk » and thus inject dynamism into its transalpine activities relying on several bilingual partners and associates.

CLIENT: Jean-Sébastien DEGOUVE, Co-fondateur et Président
COMPANY/FIRM: Opéra Energie
TESTIMONIAL: Je savais que DELSOL Avocats connaissait bien le secteur de l’énergie pour avoir fait appel au cabinet lorsque j’exerçais des responsabilités au sein du groupe SUEZ (Engie). C’est donc tout naturellement que nous nous sommes à nouveau tournés vers Emmanuel KAEPPELIN lorsque nous avons eu des besoins en M&A.

CLIENT: Kal LADHA, Directeur Général
COMPANY/FIRM: MediaSchool Group
TESTIMONIAL: Dans le cadre de notre double activité, nous sommes fréquemment confrontés à des problématiques de droit du travail (collaborateurs permanents, intervenants occasionnels, journalistes …), de droit de l’immobilier (avec la nécessité de disposer pour nos écoles de locaux aux normes ERP – Etablissement Recevant du Public), de droit fiscal (notamment sur des questions d’exonération de TVA inhérentes à la formation) et de droit des sociétés (créations, fusions-acquisitions, transformations). Nous sommes très satisfaits, depuis plusieurs années déjà, de l’accompagnement de DELSOL Avocats et notamment d’Henri-Louis DELSOL, Séverine BRAVARD et Vincent GUEVENOUX dans nos opérations d’acquisitions successives, où la pertinence des conseils du cabinet dans des délais souvent très courts et la capacité des avocats à se glisser dans la peau du client entrepreneur nous furent précieuses tout au long desdites opérations et ce, pour le spectre complet des problématiques qui nous occupent

CLIENT: Nicolas POTEL, General Counsel, France & West Mediterranean Region
TESTIMONIAL: Nous travaillons avec DELSOL Avocats depuis plusieurs années et plus spécifiquement avec Stéphane PERRIN, qui connaît parfaitement notre entreprise, ses produits et ses problématiques juridiques depuis près de 30 ans. Nous avons établi avec lui un mode de fonctionnement sur mesure combinant réactivité et compétence. Cet
accompagnement est essentiel tant sur les contentieux du groupe en France que sur des problématiques contractuelles complexes.

CLIENT: Sophie DOSTERT, Directeur Général
COMPANY/FIRM: Hôpital Européen and Hôpital Saint Joseph de Marseille
TESTIMONIAL: Notre expérience récente confirme en tout point les grandes compétences de Xavier DELSOL et ses équipes, qui ont permis de rapidement mettre en place le cadre juridique du montage en passant en revue les différents scénarios possibles.