Firm Profile > McDermott Will & Emery AARPI > Paris, France

McDermott Will & Emery AARPI
75007 PARIS

Industry focus: Healthcare and life sciences Tier 1

McDermott Will & Emery AARPI stands out for its 'deep technical understanding of the specific requirements in biotech' and its transactional expertise. The team has a strong track record for strategic M&A, often with an international slant, particularly across Europe, the US and Asia. Supported by highly capable regulatory and patent licensing practices, the department can also call on the wider offering at the firm to advise on IP, data privacy, employment, antitrust and tax matters. Team head Emmanuelle Trombe advises pharmaceutical, medical device and biopharmaceutical companies on corporate and commercial mandates, while Anthony Paronneau specialises in M&A, licensing and private equity transactions.

Practice head(s):

Other key lawyers:

Anthony Paronneau


Excellent competences and availability.

Great diversity within the team.

Emmanuelle Trombe and Anthony Paronneau are excellent professionals, always agreeable and available during a crisis.

In-depth knowledge of the biotech sector and clients’ business needs. Extremely reactive and approachable. Generally great people to work with.

Deep technical understanding of the specific requirements in biotech.

We appreciate the close proximity to partners, and their reactivity and pragmatism.

Key clients



MaaT Pharma

DBV Technologies


Alderaan Biotechnology



Yukin Therapeutics

Advent France Biotechnology



SkillCell (Alcen)



Médecins sans frontières (Doctors without Borders)

Private equity: LBO Tier 2

McDermott Will & Emery AARPI has become a well-known private equity practice, with the caseload mainly consisting of sponsor work and assistance for managers. As with the firm's US presence, the French team focuses on mid-market transactions for sponsors, while the management package practice revolves mainly around large-cap deals. The group demonstrates particular strength in the healthcare and life-science sectors, as well as in the energy, transport and telecoms industries, thanks to its Paris-based regulatory experts, and the office's banking and finance specialists also regularly join forces with their transactional colleagues. Grégoire Andrieux and Henri Pieyre de Mandiargues direct the practice. However, Carole Degonse moved to Jeausserand Audouard in December 2020.

Practice head(s):

Grégoire Andrieux; Henri Pieyre de Mandiargues

Other key lawyers:

Diana Hund; Fabrice Piollet

Key clients

Bridgepoint Development Capital

Ardian Growth


Azulis Capital


Amundi Private Equity

Activa Capital/Atlas for Men




Aryballe Technologies


Administrative and public law Tier 3

McDermott Will & Emery AARPI‘s team is recognised for its strong regulatory expertise. The firm notably acts for leading private and public operators in the energy, telecoms, airport and public transport sectors, assisting clients with their strategic issues, including litigation and public procurement work. In recent work, the practice advised Aéroports de Paris on major public procurement work, and acted for Engie and its subsidiaries in regulatory matters and the renewal of hydroelectric concessions issues in France. Other areas of strength are the setting up of funds and companies and in public law assistance in the context of M&A transactions. Sabine Naugès and Laurent Ayache co-head the practice.

Practice head(s):

Sabine Naugès; Laurent Ayache


The team  has very specialised competence in public law, an exceptional quality of writing, and a great ability to understand operational and financial issues.’

‘Perfect knowledge of the files, and highly responsive and proactive.’

‘The team has leading expertise in public law and regulatory law, particularly in the energy sector. Its skills in the areas of public contracts and concessions should be emphasised. The team also demonstrates excellent responsiveness and availability.’

‘Laurent Ayache is an excellent advisor on strategic issues affecting regulated sectors and public procurement law. His knowledge and experience, particularly in the hydropower sector, are extremely valuable.’

Key clients

Orange and its subsidiaries (Orange Marine, Orange RDC, …)

Engie and its galaxy (SHEM, Climespace, GRDF)

Groupe Action Logement

Aéroports de Paris (ADP)

Arriva Plc

Corsica Ferries

Ideal Industries

IPC Petroleum (ex-Lundin), Geopetrol and BridgeOil


Chambre de Commerce et d’Industrie du Var

Banking and finance: transactional work Tier 3

McDermott Will & Emery AARPI's finance team is particularly sought after for its work in the fund finance space and is particularly specialised in the European fund finance market. It also has capabilities in French acquisition and leveraged finance mid-cap transactions. Other specialist areas for the department include bridge financing and private equity mandates. Pierre-Arnoux Mayoly leads the team; he typically acts for borrowers and lenders on equity bridge transactions.

Practice head(s):


Excellent technical competence combined with a creative approach to finding solutions.

The team is pragmatic, fast and efficient. We can always count on them for fund finance work.

Pierre-Arnoux Mayoly is particularly remarkable for his speed and pragmatism. He knows exactly how to lead negotiations.

Key clients

Five Arrows Direct Lending

Tikehau Capital


Andera Partners

RBC (Royal Bank of Canada)


Montefiore Investment




Azulis Capital

Capital markets: equity capital markets Tier 3

McDermott Will & Emery AARPI

Practice head(s):

Bertrand Delafaye; David Revscolevschi

Key clients



DBV Technologies



Invest Securities

Mauna Kea Technologies


KBC Securities

Bryan Garnier

Gilbert Dupont

Data privacy and data protection Tier 3

McDermott Will & Emery AARPI offers a combined data protection and cybersecurity practice, with Romain Perray at the helm of the practice. The practice acts for a diverse client range, with in-depth knowledge of the automotive, life sciences, consumer goods, e-commerce and technology, public sector and industry sectors. Assistance with the development and implementation of GDPR and cybersecurity programmes, including the conduct of the necessary audits, is a core part of the caseload. Other strengths include negotiations of complex IT and commercial agreements that involve a heavy data protection component, cross-border data transfers and advising start-ups focusing on artificial intelligence, big data or medtech, often in cooperation with the firm's dedicated start-up hub.

Practice head(s):

Romain Perray

Other key lawyers:

Lorraine Maisnier-Boché


Romain Perray’s team at MWE is a very capable and professional team with excellent expertise in data protection laws, particularly in Europe. Romain as very good technical skills and is a pleasure to work with.

The team at McDermott has a pragmatic approach und offers a truly adapted legal solution to its clients.’

Romain Perray is an accomplished lawyer whose expertise in the field of data protection is outstanding. He stays abreast of developments in this constantly evolving area of law. He is supported by a team of able colleagues, including legal researcher Mai Matsubara whose expertise, professionalism and language skills have been invaluable.

Key clients

Nissan Motor Co & Nissan International

PSA (Peugeot)





Aptar Group



Dispute resolution: White-collar crime Tier 3

McDermott Will & Emery AARPI handles a diverse range of cases, including fraud, criminal employment law and international corruption accusations. The firm is regularly involved in matters connected to the public sector or involving high-level public servants. Experience includes acting for leading companies in sensitive international corruption matters, representing major international sports institutions, and financial and stock market-related cases. Alexis Werl is in charge.

Practice head(s):

Alexis Werl


Alexis Werl is a very good lawyer who is very involved in his cases and a remarkable speaker.’

Key clients

Crédit Immobilier de France (CIF-D)

Dispute resolution: Commercial litigation Tier 4

McDermott Will & Emery AARPI

Practice head(s):

Alexis Werl


‘The team is capable and reliable and it communicates in an effective manner.’

‘Alexis Werl is a good lawyer, insightful and very approachable.’


Insolvency Tier 4

Headed by Timothée Gagnepain, McDermott Will & Emery AARPI‘s practice handles a high volume of cases, often acting for shareholders, but also regularly assisting debtors. Lately, the practice was active for several companies particularly hit by the Covid-19 pandemic, for example from the transport sector. It is advising French State development bank Agence Française de Développement on several significant matters, including the financial restructuring of Air Austral, and assisted several companies with the negotiation of new additional financing. Associates Théophile Jomier  and Lucille Madariaga provide key support.

Practice head(s):

Timothée Gagnepain


‘Very good interaction between members of the team; fluid and efficient communication skills; high reactivity.’

‘Timothée Gagnepain shows excellent availability, is a very good negotiator; has in-depth knowledge of the various players and provides very good analysis of cases.’

Key clients

Agence Française de Développement

Armatis LC

LGT Private Debt


Bpifrance Financement

Prudentia Capital

Bpifrance Investissement

Paule Ka


Tax Tier 4

McDermott Will & Emery AARPI‘s team acts for a prominent client base of investment funds and corporations, especially on the structuring of mid-cap M&A and private equity transactions. The tax team also regularly joins forces with the corporate department for major M&A and private equity transactions in the healthcare sector. Cross-border matters involving the US or Italy are clear areas of expertise. Antoine Vergnat is in charge. Romain Desmonts, who made counsel in January 2021, is a key contributor to the practice.

Practice head(s):

Antoine Vergnat

Other key lawyers:

Romain Desmonts

Key clients

Campari Group/Lallier

Campari Group/Rothschild France Distribution




DBV Technologies

Eurazeo PME/UTAC





Bridgepoint Development Capital

The firm: McDermott Will & Emery partners with leaders around the world to fuel missions, knock down barriers and shape markets. Our team works seamlessly across practices, industries and more than 20 locations to deliver highly effective—and often unexpected—solutions that propel success. More than 1,200+ lawyers strong, we bring our personal passion and legal prowess to bear in every matter for our clients and the people they serve.

Areas of practice: The Paris office plays an important role for the firm internationally, helping French businesses strengthen their positions domestically, throughout Europe, the Middle East, Africa and around the world. The Paris lawyers also advise foreign and multinational investors, companies and financial institutions seeking to enter the marketplace in France. As part of an international network of collaborative lawyers, McDermott’s professionals share ideas on trends and key developments in law and on the numerous industries in which its clients operate, resulting in seamless, multidisciplinary service to its clients.

The team advises clients across numerous areas of law, including corporate, mergers and acquisitions, private equity, securities and listing transactions, corporate restructuring and bankruptcy law. The team represents clients in a wide range of industry sectors including, but not restricted to, energy (with an emphasis on projects in Africa), tour operating and telecommunications. The Paris energy practice is a dedicated team of lawyers with a strong sector focus on energy, oil and gas, and related areas such as natural resources and commodities. The team advises energy producers and traders in the US, Europe, Africa, the Middle East and Asia. The Paris lawyers also counsel clients on matters involving general commercial law, with a focus on the pharmaceutical, life sciences, medical device, biotech and healthcare industries. The dispute resolution lawyers advise on international arbitration and public law, and counsel on behalf of companies in civil, criminal and administrative matters. The employment practice advises businesses on issues such as termination, discrimination, harassment, restrictive covenant breaches, strikes and other collective conflicts, and counsels clients on the labour and employment aspects of domestic and transnational commercial matters. Furthermore, the Paris lawyers advise on the full range of EU competition issues, litigation and international tax issues. With a diversified business practice, the firm represents a wide range of commercial, industrial and financial enterprises, including publicly traded and privately held companies.

The Paris team and individual lawyers are recognised for the quality, consistency and creativity of their legal counsel. As part of a global, full-service law firm, the lawyers of the Paris office are prepared to help clients wherever their business interests take them.

Department Name Email Telephone
Corporate Jacques Buhart
Corporate Jonathan Wohl
Corporate Thibaud Forbin
Corporate Bertrand Delafaye
Corporate Nicolas Lafont
Mergers and acquisitions Thibaud Forbin
Mergers and acquisitions Bertrand Delafaye
Antitrust and competition Jacques Buhart
Tax Antoine Vergnat
Employment Jilali Maazouz
EU competition Jacques Buhart
Litigation Alexis Werl
Litigation Laurent Ayache
Public law, regulatory and government strategies Sabine Naugès
Energy, project finance, Africa Jean-Claude Petilon
Private equity Henri Pieyre de Mandiargues
Private equity Carole Degonse
Health, life sciences Emmanuelle Trombe
Health, life sciences Anthony Paronneau
Banking and finance Pierre-Arnoux Mayoly
Intellectual property Laura Morelli
Privacy & Cybersecurity Romain Perray
Capital Markets David Revcolevschi
Capital Markets Bertrand Delafaye
Photo Name Position Profile
Mr Grégoire Andrieux  photo Mr Grégoire Andrieux Grégoire Andrieux is a partner, he focuses on domestic and international mergers and…
Mr Laurent Ayache  photo Mr Laurent Ayache Laurent Ayache is a partner and co-head of the Regulatory Practice in…
Mr Jacques Buhart  photo Mr Jacques Buhart Jacques Buhart is a partner, he focuses his practice on cross-border mergers…
Ms Carole Degonse  photo Ms Carole Degonse Carole Degonse is a partner, she focuses her practice on leveraged buyout (LBO)…
Ms Shirin Deyhim  photo Ms Shirin Deyhim Associate Shirin Deyhim focuses her practice on structured finance transactions; in particular…
Mr Aymeric Discours photo Mr Aymeric Discours Partner Aymeric Discours represents clients in general mergers and acquisitions, and commercial…
Mr Timothée Gagnepain photo Mr Timothée Gagnepain Partner Timothée Gagnepain focuses his practice on complex restructurings and insolvencies, both…
Mr Lionel Lesur  photo Mr Lionel Lesur Lionel Lesur is a partner, he advises domestic and international companies from a…
Mr Jilali Maazouz  photo Mr Jilali Maazouz Jilali Maazouz is a partner, focusing his practice on labor and employment,…
Mr Pierre-Arnoux Mayoly  photo Mr Pierre-Arnoux Mayoly Partner Pierre-Arnoux Mayoly focuses on structured finance matters, in particular in the…
Ms Sabine Naugès photo Ms Sabine Naugès Sabine Naugès is a partner, her practice focuses on all aspects of…
Mr Anthony Paronneau  photo Mr Anthony Paronneau Anthony Paronneau is a partner, he advises clients on all aspects of corporate and…
Mr Henri Pieyre de Mandiargues  photo Mr Henri Pieyre de Mandiargues Henri Pieyre de Mandiargues is a partner, he focuses on private equity transactions,…
Ms Emmanuelle Trombe  photo Ms Emmanuelle Trombe Partner Emmanuelle Trombe represents pharmaceutical, medical device and bio-pharmaceutical companies globally in…
Mr Antoine Vergnat  photo Mr Antoine Vergnat Partner Antoine Vergnat focuses his practice on advice to French and non-French…
Mr Alexis Werl photo Mr Alexis Werl Partner Alexis Werl regularly represents local and international corporations, high-net-worth and politically…
Number of lawyers : 1200
at this office : 71
All main business languages
Strategic alliance with MWE China Law Offices
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