Winston & Strawn LLP > Paris, France > Firm Profile

Winston & Strawn LLP
75008 PARIS

France > Industry focus: Healthcare and life sciences Tier 2

Praised for its ‘exceptional quality’, the practice at Winston & Strawn LLP advises a varied client roster consisting of professional organisations, investors into the healthcare sector, and networks of healthcare practitioners. Exhibiting deep transactional expertise, the team regularly advises on private equity investments, corporate issues, and M&A. Practice co-head Gilles Bigot acts for a number of different players in French and European healthcare markets, including laboratories, medical equipment manufacturers, and health institutions in corporate matters. Co-head Julie Vern Cesano-Gouffrant has a great deal of experience in handling both regulatory and transactional matters, including recapitalisations and leveraged buyouts.

Practice head(s):

Gilles Bigot; Julie Vern Cesano-Gouffrant


‘Very attentive to estimating customer needs at all stages of the process.’

‘A relevant mix of knowledge of law, field practice and great creativity to bring new models to the surface.’

‘The Winston team has in-depth expertise in legal vendor due diligence, and in-depth knowledge of the aesthetic medicine sector. Their lawyers are very qualified and experienced in this type of operations. Their approach is both pragmatic and creative, finding tailor-made solutions.’

‘The team is of exceptional quality. Their expertise shines though in finding solutions to address all the issues. All demonstrated exemplary rigor and professionalism in conducting due diligence.’

‘Unique expertise in the health sector, strong links with all stakeholders, true insider partner. The team issues confident recommendations to navigate the regulations and proactively covers all possibilities.’

‘Gilles Bigot has unique expertise and participates in all discussions.’

Key clients






La Croix Rouge Française







Ramsay Générale de Santé

Sarah Santé Group

Abenex Capital SA

Telemos Capital / MedEuropa

Capital Croissance

CRF Jeanne d’Arc

MBO & Co.


Core Equity Holdings


Centres de Médecine Nucléaire


Work highlights

  • Advised the Imapôle group on the acquisition of a minority stake by Eurazeo and Bpifrance.
  • Advised Horadianse SAS on the sale of the majority of its share capital.
  • Assisted the Lazeo group on its partnership with Blackstone.

France > Capital markets: equity capital markets Tier 3

Led by Annie Maudouit-Ridde, Winston & Strawn LLP's team handles a large spectrum of deals on behalf on issuers, investors and financial advisers. The team advises on small to larger offerings including block trade sales and shareholder capital increase, and also regularly works on Euronext Growth and Access + IPOs as well as on major IPOs by SPACs.

Practice head(s):

Jérôme Herbet, Annie Maudouit-Ridde


‘Good responsiveness, skills and advice highlighting risk factors and opportunities. Innovative solutions.’

‘Deep knowledge and genuine care for clients. They don’t just offer standard solutions but think creatively and outside the box. Their relentless pursuit of results, combined with a strong ethical grounding, ensures clients’ legal concerns are handled expertly. Annie Maudouit-Ridde shows incredible skills in navigating complex legal landscapes, always ensuring clients’ needs are met with precision and timely responses. Their consistent communication and willingness to go the extra mile is especially valuable.’

‘Annie Maudouit-Ridde is very precise and summarizes key subjects perfectly.’

‘Annie Maudouit-Ridde is an outstanding lawyer. She is business savvy, commercial and understands what needs to be done for clients. From a technical point of view, she is highly skilled, but also approachable and great to work with.’

‘Particularly efficient and constructive team. Capable of delivering very high quality documents in record time.’

‘Friendly and customer-oriented team’.

‘Excellent team.’

‘Annie Maudouit-Ridde is a very talented lawyer, with whom it is easy to collaborate. She will seek innovative solutions with the aim of facilitating the completion of her clients’ operations. She has a perfect command of the regulations and knows how to make herself heard by the French securities regulator.’

Key clients

Auplata Mining Group

Aurel BGC

Cantor Fitzgerald Europe

Digital Virgo Group

Delta Drone

Drone Volt

GECI International

Groupe Airwell



Priveterra Acquisition Corp. II



Transition Evergreen

Yorkville Advisors

Smart Good Things

Work highlights

  • Advised Osmosun and the placing agents Portzamparc (Groupe BNP Paribas) and TP ICAP in connection with Osmosun’s initial public offering on Euronext Growth.
  • Advised Smart Good Things Holding in connection with its listing on Euronext Access + Paris followed a few months later by a strategic equity investment by group Casino.
  • Advised Digital Virgo Group, a French FinTech, on its contemplated business combination with Goal Acquisitions Corp., a US SPAC, and its reverse IPO on the Nasdaq stock exchange.

France > Banking and finance: transactional work Tier 4

Practice head(s):

Mounir Letayf

Other key lawyers:


‘Extremely available and dedicated team. ’

‘High availability, reliability, situation intelligence’

‘Ariane Berthoud: rigor, availability and knowledge of financing issues.’

Key clients

Ardian Private Equity


Muzinich & Co.

Andera Partners

Siparex Ingenierie et Finance

123 Investment Managers

H.I.G Capital

Pytheas Capital Advisors

Schelcher Prince Gestion

Compagnie de Phalsbourg

HPC Capital

Work highlights

  • Advised the Group Muzinich & Co in relation to a unitranche financing for the acquisition by HLD EUROPE SCA of Group INFODIS SAS.
  • Advised the Group Siparex in relation to a unitranche financing for the acquisition of Group HB Aesthetic, alongside Amethis Europe Expansion.
  • Advised ISAI Expension on the acquisition of a minority stake in Driiveme.

France > Dispute resolution: Commercial litigation Tier 4

Practice head(s):

Mathilde Lefranc-Barthe

Other key lawyers:


‘High quality of work provided.’

‘Mathilde Lefranc-Barthe shows great competence.’

‘Nice team.’

Key clients

Union Asset Management Holding (UAMH)

Singka International Pte. Ltd.

Niche Fused Alumina

Operateur de compétence des entreprises de proximité

Evergaz SA


Immobiliare Seta

IRIS Finance SA

Vert Marine

Digital Classifieds France SAS

Centre de Rééducation Fonctionnelle JEANNE D’ARC


Work highlights

  • Obtaining the release of goods seized by Singaporean shipping operator Austral Asia Line PTE LTD before French Courts (Rouen) for Double A and VPK Paper Normandie.
  • Represented a German pension fund Union Asset Management Holding (UAMH) regarding investment made in Vivendi based on false and fraudulent information.
  • Representing Niche Fused Alumina before French court (Mulhouse) in a commercial litigation, concerning the performance of an electricity supply contract with Vattenfall Energies.

France > Employment Tier 4

Winston & Strawn LLP

Practice head(s):

Virgile Puyau; Sophie Dechaumet

Other key lawyers:

Joël Fernandez; Karine Audouze


‘Sophie Dechaumet is a key player in social law, she highlights her team and gives them the means to succeed.’

‘The team led by Virgile Puyau stands out for its modern and pragmatic approach to the subject. Their high-quality work takes into account the operational needs and constraints of their clients. The team demonstrates great availability and responsiveness, particularly in the event of an emergency, while providing sound legal advice.’

‘Virgile Puyau clearly stands out for his understanding of operational but also strategic issues.’

‘Joël Fernandez, also stands out for his responsiveness and his ability to propose solutions adapted to our specific needs. He demonstrates great professional qualities: accessible and thoughtful. ’

‘Sophie Dechaumet: Responsive. She has a reassuring attitude and is very professional. She is a winner.’

‘The team is very professional and people are immediately available and attentive. There is a diversity of complementary skills within Winston. I particularly appreciate the mix of professionalism and proximity to the client, we feel supported and the teams are very concerned about the issues.’

‘Virgile Puyau has a perfect mastery of business knowledge and combines remarkable strategic experience in negotiations, he is always at the right level and maneuvers skillfully to achieve the objective.’

Key clients


Accueil Immobilier SAS

Act Beauty France

Adoc Talent Management


Association pour le Développement du Service Notarial (ADSN)

Cash Paris Tax Refund Sarl

Comcast Group

Davril Promotion SAS


Fimo France

Fondation Saint Francois

Generix Group

Groupe Accueil


Groupe OPALE SAS (ALSEI Group)

Groupe Sevetys

High Executives exits

Imalliance SA


Information et Diffusion ID Sarl (RTL)

Jaybeam Wireless



Metropole Television SA (M6)

Outpost 24

Polygon France SAS

Qair Group

Rouje SAS


TVH Consulting SAS

Venedim SAS

Work highlights

  • Advised Generix Group and its subsidiaries on all the labor & employment aspects of its external growth operations and intra-group reorganisations.
  • Assisted Comcast International France with the regrouping of all the employees of its various subsidiaries (Comcast International France and the NBCU entities).
  • Advised Sevetys in connection with the opening to new investors of the capital of the company and day-to-day assistance.

France > Private equity: LBO Tier 4

Winston & Strawn LLP

Practice head(s):

Grine Lahreche

Other key lawyers:

Audrey Szultz; Thomas Pulcini; Ariane Berthoud


‘Grine Lahreche stands out for his commitment to his clients, availability and ability to adapt to customer needs and innovate to meet them. He is also an excellent negotiator. Audrey Szultz – rigour, ability to deliver – very high quality service.’

‘Expertise, availability, quality of advice and support.’

‘The entire team I dealt with was excellent in their area of ​​expertise, monitoring and coordination: Grine Lahreche, Audrey Szultz, Thomas Pulcini.’

‘Proximity with customers, responsiveness, quality of relationship. Situational intelligence, market knowledge. Ability to find creative solutions and compromises.’

‘The team stood out for its technicality and professionalism. In particular, the team showed great availability throughout a difficult process.’

‘Grine Lahreche led the project with great professionalism. He showed a particularly keen understanding of the issues and forces involved. With great finesse, he knew how to defend the interests of our clients from start to finish.’

‘Very detailed knowledge of the French private equity market and great mastery of files.’

‘Professionalism and availability. Very good knowledge of the health sector.’

Key clients

123 Investment Managers

21 Invest France

Albarest Partners

Andera Partners

Apax Partners/Crystal Holding

Aqua Asset Management

Ardian Growth

Ardian Private Debt

Ardian Private Equity




Eurazeo Direct Lending

H.I.G. Capital Partners

IK Partners

Indigo Capital

Initiative & Finance


Keensight Capital

LBO France

MBO & Co

Muzinich French Private Debt

Omnes Capital (IdiCo)

Pléiade Investissement

Questel International

Quilvest Capital Partners

S2G Advisors llc


Syparex Intermezzo

Telemos Capital

Work highlights

  • Advised CAPZA on the sale of its entire stake in Coutot-Roehrig, the largest probate research company in Europe.
  • Advised Keensight Capital on the acquisition of a majority stake in BYG4lab, a leading data management software for medical laboratories.
  • Advised the management team of the Milexia Group on the acquisition of a majority stake by Crédit Mutuel Equity.

France > Tax Tier 5

France > Mergers and acquisitions Tier 6

Practice head(s):

Jérôme Herbet

Other key lawyers:


‘A high-performing team.’

‘Jérôme Herbet is very responsive, a very good M&A specialist, and provided support on transactions of relatively high complexity.’

‘High speed of execution. Systematic compliance with deadlines. High quality of deliverables. Precise recommendations. Always relevant advice to the issues linked to the asset management sector. ’

‘Pragmatic. Deal-makers. Respect for confidentiality. Reassuring in complex situations.’

Key clients

Amphenol Corporation

Apax Partners/Crystal Holding

Ardian & Mérieux Equity Partners

Biofutur and Omnes

bioMérieux SA

Chart Industries (NYSE: GTLS)

Colam Entreprendre


Definitive Media Corp. and THREAD

Digital Classifieds France SAS


Everimmune SAS


Financial Acquisitions Corp.


Groupe Crystal


Selig Group

Smart Good things

SmartTrade Technologies

Technology & Strategy

Transition Evergreen

TVH Consulting

Union Asset Management Holding AG

Work highlights

  • Represented Chart Industries in connection with its acquisition of UK-based fan manufacturer Howden from KPS Capital Partners.
  • Represented Crystal private banking group in the acquisition of several independent wealth management companies, with a view to creating the French leader in wealth management.
  • Represented IAD France, the leading network of real estate agents in France, on the acquisition of Homepilot, a rental management start-up.

France > Compliance

The team at Winston & Strawn LLP is led by Sara Susnjar, who covers a range of compliance mandates, from economic sanctions, anti-corruption and anti-money laundering to data protection and privacy.

Winston & Strawn LLP is an international law firm with more than 950 attorneys among 15 offices in Brussels; Charlotte; Chicago; Dallas; Houston; London; Los Angeles; Miami; New York; Paris; San Francisco; São Paulo; Shanghai; Silicon Valley; and Washington, DC.

Winston was founded in Chicago in 1853 by Frederick H Winston, who was joined by the firm’s other named partner, Silas H Strawn, in 1894. Winston has built its reputation on the quality and character of its lawyers, past and present, many of whom are recognized leaders in the American legal community. The firm’s history of more than 160 years is a chronicle of individuals and events that have helped shape the firm and create the strong foundation on which it continues to build. Today, Winston is one of the largest law firms in the United States through a series of mergers, office openings and lateral hires in the past two decades.

The firm serves the needs of enterprises of all types and sizes, in both the private and public sectors. The exceptional depth and geographic reach of its resources enable Winston to manage virtually every type of business-related legal issue.

Winston understands that clients look for value beyond just legal experience. With this in mind, the firm works hard to understand the level of involvement its clients require of it. The firm’s lawyers take time to learn about clients’ organizations and their business objectives. Significant emphasis is placed on technology and teamwork in an effort to respond quickly and effectively to clients’ needs.

Winston remains committed to the traditions of client service, professional development and community involvement instilled by its leaders of the past, while embracing the innovations driving the legal profession in the 21st century.

Main areas of practice: The firm’s main areas of practice include: litigation, corporate and finance, mergers and acquisitions and securities, labor and employment, intellectual property, international arbitration, real estate, tax, energy, environmental, employee benefits and executive compensation, financial services, healthcare, maritime and admiralty, antitrust/competition, restructuring, sports, white-collar, securities litigation, private equity, appellate and critical motions, REITs, restructuring, E-discovery and trusts and estates.

Established in 1995, the Paris office of Winston & Strawn is composed of lawyers who are well-versed in European and foreign business law, litigation and arbitration. All of the lawyers in the office are members of the Paris Bar and several have been admitted to Bars in the US and other countries.

Department Name Email Telephone
Paris Managing Partner Jérôme Herbet +33 1 53 64 82 04
Litigation/ Healthcare Life Science Gilles Bigot +33 1 53 64 82 27
Healthcare Life Science Julie Vern Cesano-Gouffrant +33 1 53 64 81 79
Litigation Mathilde Lefranc-Barthe +33 1 53 64 82 63
International Arbitration Maria Kostytska +33 1 53 64 82 44
Compliance Regulatory Sara Susnjar +33 1 53 64 81 33
Private Equity Grine Lahreche +33 1 53 64 82 28
Labour and Employment Virgile Puyau +33 1 53 64 81 93
Labour and Employment Sophie Dechaumet +33 1 53 64 82 75
Tax Edouard De Rancher +33 1 53 64 81 34
Banking & Finance Ariane Berthoud +33 1 53 64 82 77
Banking & Finance Adeline Roboam +33 1 53 64 81 49
Banking & Finance Mounir Letayf +33 1 53 64 81 98
Corporate/Capital Market Annie Maudouit-Ridde +33 1 53 64 82 80
Corporate Sophie Nguyen +33 1 53 64 82 61
Tax Thomas Pulcini +33 1 53 64 81 80
Corporate Alexis Terray +33 1 53 64 81 64
Corporate Edith Boucaya +33 1 53 64 82 48
Photo Name Position Profile
Ariane Berthoud photo Ariane Berthoud Partner –  Banking & Finance
Gilles Bigot photo Gilles Bigot Partner – Corporate / Healthcare
Edith Boucaya photo Edith Boucaya Partner – Private Equity
Sophie Dechaumet photo Sophie Dechaumet Partner – Labor & Employment
Jérôme Herbet photo Jérôme Herbet Managing Partner
Maria Kostytska photo Maria Kostytska Partner – International Arbitration
Grine Lahreche photo Grine Lahreche Partner – Private Equity
Mathilde Lefranc-Barthe photo Mathilde Lefranc-Barthe Partner – Complex Commercial Litigation
Mounir Letayf photo Mounir Letayf Partner – Banking & Finance
Annie Maudouit-Ridde photo Annie Maudouit-Ridde Partner – Capital Markets
Virgile Puyau photo Virgile Puyau Partner – Labor & Employment
Adeline Roboam photo Mme Adeline Roboam Adeline Roboam advises international and domestic clients on all aspects of banking…
Sara Susnjar photo Sara Susnjar Partner – Compliance / Corporate
Julie Vern Cesano-Gouffrant photo Julie Vern Cesano-Gouffrant Partner – Corporate / Healthcare  
Edouard de Rancher photo Edouard de Rancher Partner – Tax
Number of lawyers : 950+
at this office : 60+
Contact : Marine Trabon - Senior BD Specialist :

The firm: For more than 160 years, Winston & Strawn LLP has served as a trusted adviser and advocate to companies in a broad array of industries. The firm has built a law practice with tremendous breadth and a global presence across the US, Europe, Middle East and Asia. Winston & Strawn’s 15 offices are located in major business centres around the world, including Brussels, Charlotte, Chicago, Dallas, Houston, London, Los Angeles, Miami,  New York, Paris, San Francisco, São Paulo, Shanghai, Silicon Valley and Washington, DC.

Winston helps international and Chinese clients navigate the changing business and regulatory landscape in pursuing opportunities in China and assists private and public China-based clients conducting outbound business activities. Navigating through the country’s legal landscape requires a trusted advisor with proven experience, cross-border expertise, and industry-specific insight. Located in Lujiazui, the center of this major financial hub of China, the Shanghai office consists of foreign-qualified attorneys who have studied and practiced Chinese law and excel at bridging the gap between Western and Chinese legal concepts as well as cultural and commercial differences. They stay abreast of the fast-changing legal and regulatory environment across the region, and are adept at translating the local laws and regulations to actionable advice for international companies.

Chinese law capabilities: Winston’s China practice combines the firm’s global capabilities with our strategic alliance with Yuanda China Law Offices, one of China’s leading local law firms. Known as YuandaWinston, the team combines first-hand knowledge of China’s legal, political and regulatory environment and offers a strong bench of nearly 50 attorneys, many with prior experience in roles throughout China’s judiciary, prosecutor’s offices, government agencies, and in-house legal department of large corporations. The team’s knowledge of China’s complex legal environment helps clients navigate regulatory complexities, cross-border transactions and investigations, minimize risk and successfully engage with government agencies.

Department Name Email Telephone
Chairman Stephen D'Amore +1 312-558-5934
Co-Executive Chairman Jeffrey Kessler +1 212-294-4698
Co-Executive Chairman Dan Webb +1 312-558-5856
Managing Partner – Internal Affairs Cardelle Spangler +1 312-558-7541
Managing Partner – External Affairs Eva Davis +1 213-615-1719
Managing Partner – International Affairs Peter Crowther +44 20 7011 8750
Chief Strategic Officer Dominick DeChiara +1 212-294-2609
Co-Chair, Litigation Department Linda Coberly +1 312-558-8768
Co-Chair, Litigation Department Tom Melsheimer +1 214-453-6401
Co-Chair, Transactions Department Timothy Kincaid +1 312-558-5243
Co-Chair, Transactions Department Brad Vaiana +1 212-294-2610
Chinese (Mandarin)