Jean-Marie Preel

Matthieu Grollemund is a Private Equity M&A partner and a member of the Firm’s Private Capital industry group. Triple-qualified in French, U.S., and U.K. law, Matthieu has over two decades of experience advising on complex cross-border transactions in highly regulated sectors, including technology and healthcare. Matthieu advises private equity sponsors, venture capital firms, public and private companies, as well as boards and special committees, on high-stakes investments, public ...

Olivier Binder is a top attorney recognized by Best Lawyers in the practice area(s) of Competition / Antitrust Law. Olivier, who practices law in Paris, France, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Olivier is held by other top lawyers in the same geographic and legal practice area.

Daouda Ba is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Daouda, who practices law in Paris, France, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daouda is held by other top lawyers in the same geographic and legal practice area.

Maria acts as lead counsel in investor-state and commercial arbitration and litigation across a variety of industrial sectors, including oil and gas, renewable energy, utilities, infrastructure, banking, aviation and manufacturing. She also serves as arbitrator.

Peter Sherwin is a partner in the Litigation Department, head of the International Arbitration Group, head of the Commercial Real Estate Litigation Group, and a member of the Latin America Practice. Peter counsels clients in complex cross-border commercial disputes, often involving a joint venture, a licensing or distribution relationship, or an acquisition, most of which are resolved in international arbitration and the rest in federal and state courts in the United States. He has significan...

Gaëlle MERLIER is co-head of the Life Sciences Department. Gaëlle’s expertise spans advisory work on regulatory and contractual matters as well as the management of complex, serial litigation in commercial matters and health product liability. She also assists her clients during criminal investigations and in their dealings with the health authorities (particularly in the context of ANSM, DGCCRF, DDPP inspections, etc.). Furthermore, Gaëlle advises her clients on mergers-...

Guillaume Kellner is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Mergers and Acquisitions Law and Private Equity Law. Guillaume, who practices law in Paris, France, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Guillaume is held by other top lawyers in the same geographic and legal practice area.

Founding partner of HBC AVOCATS (2008 to present) General Counsel of Genset, Paris and Gencell/Centelion, Paris (1998-2004) Shearman & Sterling, Associate, New York, London and Paris (1994-1997) Member of the Paris Bar (since 2004) and New York Bar (since 1995)

Diego Romero is a top attorney recognized by Best Lawyers in the practice area(s) of International Arbitration. Diego, who practices law in Paris, France, has been recognized since 2027. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Diego is held by other top lawyers in the same geographic and legal practice area.

Known for his expertise in international taxation and transfer pricing, Cyril Maucour advises and represents a French and international client base comprising entrepreneurs, growing companies, startups, SMEs and large groups operating in various sectors such as industry, technology, fashion, pharmaceuticals, and renewable energy. He provides guidance and support to French companies in their international expansion, offering specific expertise on foreign tax regimes. He assists foreign groups ...