The Board of directors

Thierry Le Hénaff 

Chairman and Chief Executive Officer

Born in 1963, Thierry Le Hénaff is a graduate of France’s École Polytechnique and École Nationale des Ponts et Chaussées and holds a Master’s degree in Industrial Management from Stanford University in the United States. He is a Chevalier de l’Ordre National du Mérite, as well as a Chevalier de l’Ordre National de la Légion d’Honneur (French order of merit awards). He is lead independent member of the Supervisory Board and a member of the Compensation and Appointments committee of Michelin. He has also been a member of the Board of Directors of the École Polytechnique Foundation since 2016, and of France Industrie since 2021.

After starting his career with Peat Marwick Consultants, in 1992 he joined Bostik, Total’s Adhesives division, where he held a number of operational positions in France and worldwide. In July 2001, he was appointed Chairman and Chief Executive Officer of Bostik Findley, the new entity resulting from the merger of Total’s and Elf Atochem’s Adhesives divisions. In January 2003, he joined Atofina’s Executive Committee and then Total’s management committee in 2004. He has been Chairman and Chief Executive Officer of Arkema since the Company’s stock market listing in 2006.

Date of first appointment: 2006
Date appointment expires: 2028

Bpifrance Investissement

Non-Executive Director, represented by Sébastien Moynot

Bpifrance assists businesses - at every stage of their development - providing loans, guarantees and equity. Bpifrance supports them in their innovation and international expansion projects. Bpifrance now also provides export insurance services with a wide range of products. In addition, consulting, academic, networking and acceleration programs for start-ups, SMEs and mid-caps are also part of its services to entrepreneurs. Thanks to Bpifrance and its 50 regional offices, entrepreneurs benefit from a local, single and efficient point of contact to help them meet their challenges effectively.

The Lac1 fund acquires long-term stakes in French listed multinationals and plays an active role in their governance. It has an investment capacity of €5.2 billion after its first round of funding alongside Bpifrance, involving around thirty subscribers, amongst which French and international institutional investors, large corporations and family offices. Lac1 is managed by Bpifrance Investissement, and draws on Bpifrance’s position within its ecosystem, its knowledge of technological and environmental transitions, as well as its expertise in the governance of listed companies. Bpifrance Investissement is Bpifrance’s equity financing arm.

Sébastien Moynot, born in 1972, is a former student of Ecole Normale Supérieure de Paris, holds a Master of Advanced Studies in probability from Université Pierre et Marie Curie, and is a graduate of Ecole Nationale de la Statistique et de l’Administration Economique with an agrégation in mathematics. He started his career in the economic forecasting department of the French Ministry of Finance. From 2000 to 2004, he was responsible for the strategy and then the debt issuance operations of Agence France Trésor, managing the French government’s debt. He was then in charge of companies in the transportation sector on behalf of the French State Holdings Agency and, in this role, oversaw the IPO of several investees. He joined Fonds Stratégique d’Investissement at its creation in 2009, and then Bpifrance where, since 2013, he has been a member of the management team of the Development Capital business, for which he has made a large number of equity investments in companies across all sectors.

Over the last 15 years, Sébastien Moynot served on the Board of Directors of about 20 companies in particular in various industrial sectors or in the field of renewable energies.

Date of first appointment: 2021
Date appointment expires: 2029

Marie-Ange Debon

Non-Executive Independent Director

Born in 1965, Marie-Ange Debon is a graduate of the France's École des hautes études commerciales (HEC) and École nationale d'administration (ENA), and holds a master’s degree in law. She serves as independent director of TotalEnergies and, since October 2025, as Chairwoman and Chief Executive Officer of La Poste.

Before joining La Poste in 2025, Marie-Ange Debon held several positions in both the public and private sectors, including as auditor and then as magistrate at the Cour des comptes (national audit office) from 1990 to 1994. She served as Deputy Chief Executive Officer at France 3 from 1994 to 1998. In 1998, she began working with the Thomson Group as Deputy Chief Financial Officer, and in July 2003 became General Secretary. In 2008, she joined Suez as General Secretary and member of the Executive Committee. In 2013, she was appointed Head of the international division (North America, Asia, Pacific, Africa, India) and between March 2018 and December 2019 served as Deputy CEO in charge of France, Italy, Central and Eastern Europe. In August 2020, she became Chairwoman and Group Chief Executive Officer, Keolis, the public transport group, until October 2025.

She is Vice-President of Medef International and Chairwoman of Union des Transports Publics et Ferroviaires.

Date of first appointment: 2018
Date appointment expires: 2030

Ilse Henne

Non-Executive Independent Director

Ilse Henne, born in 1972 in Ghent, Belgium, holds several advanced business management degrees from the Universities of Ghent and Leuven, Belgium, as well as a master’s degree in linguistics and literature, also from the University of Ghent. She has been a member of the Executive Board of thyssenkrupp AG since 1 January 2024. She is also Chairwoman of the Executive Board of thyssenkrupp Materials Services GmbH, Chairwoman of the Board of Directors of thyssenkrupp Steel Europe AG, the Group’s steel division, and Chairwoman of the Supervisory Board of thyssenkrupp Decarbon Technologies, the branch of the group specialized in decarbonation technologies. Ilse Henne speaks five languages fluently, including French, and has been living in Germany since 2012.

Ilse Henne began her career in 1995 at Sadel NV, a Belgian group specializing in stainless steel products, where she worked in various positions in business development, sales and supply chain management until 2002. Since 2002, she joined the Materials division of thyssenkrupp Group, which is specialized in the distribution of steel and non-ferrous metals in Belgium. Between 2012 and 2018, she held various management positions in Germany: first as head of the Materials Western Europe/Asia-Pacific operating unit, and from 2016 to 2018 as CEO of thyssenkrupp Schulte. From 2019 to 2023, she served on the Executive Board of the thyssenkrupp Materials Services segment in her capacity as Chief Transformation Officer. She was responsible for the Group’s operating performance and strategic transformation.

Date of first appointment: 2021
Date appointment expires: 2029

Florence Lambert

Non-Executive Independent Director

Born in 1972, Mrs. Florence Lambert is a graduate of the Institut National Polytechnique de Grenoble and holds a PhD in electrochemistry on renewable energy storage. She is an Officier de l’Ordre National du Mérite, as well as an Officier de l’Ordre National de la Légion d’Honneur (French order of merit awards). Since 2021, she has been President and Chief Executive Officer of Genvia, a company whose aim is to develop and deploy industrial technology for the production of decarbonized hydrogen.
 
Mrs. Florence Lambert began her career in 2000 at the French Atomic Energy and Alternative Energies Commission (CEA) where she held various positions. She was first in charge of a laboratory, particularly in the field of renewable energy storage, and then participated in the creation of the French National Institute for Solar Energy (INES) of the CEA, before joining it in 2006. In 2009, she became Head of the Electricity and Hydrogen for the Transportation Department where she developed the integration of two key components: lithium-ion batteries and fuel cells. From 2012 to 2020, she was head of the CEA-LITEN (Innovation Laboratory for New Energy Technologies and Nanomaterials), bringing together more than a thousand researchers working on the energy transition, and filing more than 200 patents per year.
 
Mrs. Florence Lambert is also Chairwoman of the Flexibility Commission of the Renewable Energy Union (since 2019), a member of the Academy of Technologies (since 2021) and a member of the Board of Directors of France Hydrogène (since 2025).

Date of first appointment: 2023
Date appointment expires: 2027

Nicolas Patalano

Director representing Shareholder Employees

Born in 1971, Nicolas Patalano holds a degree in process engineering from the Institut de Génie Chimique in Toulouse. He is currently Medium Term Project Technician in Arkema's High Performance Polymers Business Line. Since joining the Group in 1998, Nicolas Patalano has held various positions within Arkema, including Process Technician, Industrial Hygiene Manager and Site Contract Manager in the HSE department, as well as Medium Term Correspondent in the Orgasol^® manufacturing line.

In addition, he has held several positions within employee representative bodies for the CFE-CGC trade union, including Union Delegate, Central Union Representative and Group Coordinator. He is Chairman of the regional union body Syndicat Régional Chimie Pyrénées Garonne.

Date of first appointment: 2022
Date appointment expires: 2030

Susan Rimmer

Director representing employees

Born in 1975, of British and French nationality, Susan Rimmer is a graduate of the University of York in the United Kingdom and of the École Centrale de Marseille in France. 

She started her career at Cray Valley Ltd. in Wales as a Technical Service Chemist then became Demand Manager. Expatriated to Cray Valley SA in 1999, first at the Villers-Saint-Paul site then at the “ Centre de Recherche de l’Oise” R&D Centre, she held several positions in technical services, sales and product regulation.

She joined Arkema in 2011. In 2013 she became EMEA Product Stewardship and Sales Administration Manager for the Fluorochemicals Business Unit, before taking on the position of Global Product Stewardship Manager within Arkema Coating Resins in 2019.

In 2021, she became Product Stewardship Manager for Sartomer and Crayvallac activities within the Coating Solutions segment.

Since December 2025, she has held the position of Product Stewardship Advocacy Manager in the Sustainable Development Department.

Date of first appointment: 2020
Date appointment expires: 2028