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Arkema participates in the creation of a recyclable speed board to set new records. At JEC World 2026, Arkema and Zephir Project introduced a prototype of an eco-designed speed board made with Elium(R) resin, the first recyclable liquid thermoplastic resin. This board incorporates materials that promote circularity right from the design stage, paving the way for a new generation of composite parts that combine performance, precision, and recyclability. The board will be used by Antoine Albeau and the Zephir Project for their upcoming competitions, marking a new milestone in this collaboration: * Windsurfing Speed World Championships from April 27 to May 6, 2026, in La Palme (Aude) * World record attempts from June 1 to 30, 2026 (Aude) Elite sports supporting the recycling of composite materials. By joining the Zephir Project, Arkema is once again using extreme sports environments as testing grounds to unlock the potential of its materials. Exposed to particularly high stress levels in terms of acceleration, stability, and rigidity during the pursuit of sailing speed records, Elium(R) resin enables the design of high-performance structural components while remaining fully chemically recyclable: through a depolymerization process, the fibers and resin can be separated and then recycled, with the resin subsequently reused to produce recycled resin, thereby reinforcing the complete circularity of the composites industry. As used in the speed board prototype presented at JEC World 2026, Elium(R) resin plays a pivotal role in a circularity demonstrator that is unique within the composites industry. Eco-designed using recycled carbon fibers and a core foam with the same chemical composition as Elium(R) resin - thus eliminating any separation step during recycling - the board combines high mechanical performance, manufacturing precision, and complete recyclability. Its liquid form allows Elium(R) resin to produce high-precision parts suited to the complex geometries of speed boards, while delivering performance comparable to that of thermosetting materials used in the most demanding sports environments. By incorporating Elium(R) resin into a project as ambitious as the Zephir Project, Arkema demonstrates its ability to accelerate the development of fully circular composites while supporting manufacturers in their transition to low-carbon solutions. This demonstrator thus illustrates the potential of Arkema's specialty materials in delivering extreme performance, innovation, and sustainability. This project brings together leading players in their respective fields: * Zephir Project: Co-founded by Marc Amerigo and world champion sailor Antoine Albeau, the project aims to push the boundaries of sailing speed records through a cutting-edge scientific approach that combines advanced simulations, material innovations, and testing under extreme conditions. * ALTEN: A global leader in engineering and IT services, contributing its expertise in modeling, simulation, and optimization of ultra-high-performance composite structures to the Zephir project. * Arkema: A global leader in Specialty Materials that develops Elium(R) resin, the first recyclable liquid thermoplastic acrylic resin, enabling the manufacture of high-performance structural parts while enhancing the circularity of composites. * Alpha Recyclage Composite: A major player in the emergence of a sector dedicated to the recycling of composite materials, particularly through the recovery and upcycling of recycled carbon fibers. * Evonik: An international chemical company specializing in high-performance materials, notably a supplier of Rohacryl(R) foam, a technical acrylic foam used for lightweight and rigid composite structures. * Neo Sailing Technologies: A pioneer in shipbuilding using advanced materials and the first company to build racing boats entirely from Elium(R) resin, demonstrating the potential of this recyclable technology at a very early stage. About the Zephir project. The Zephir Project, co-founded by Marc Amerigo, a renowned engineer in the world of record-breaking, and Antoine Albeau, France's most decorated athlete with 27 world titles in windsurfing, centers on a program of technological and athletic exploration aimed at combining high performance with environmental responsibility. Driven by a methodical approach, it moves forward through successive stages to unlock the secrets of absolute gliding and set new sailing speed records: research, testing, and concept validation. The project begins with a phase of advanced analysis and simulation, utilizing 3D modeling, big data, and artificial intelligence to understand the parameters that influence the stability, energy, lift, and safety of very high-speed craft. This digital work is followed by a second phase of experiments under controlled conditions, including wind tunnel tests and onboard measurements to validate the dynamic behavior of the prototypes. By leveraging data analysis and AI algorithms, these tests are a crucial step in refining geometries, optimizing structures, and preparing configurations for record-breaking attempts. The third phase, conducted on the water with Antoine Albeau, transforms these technical advances into athletic performance. The champion's board then becomes a veritable laboratory for exploration, allowing for real-world testing of material choices, structural designs, and all aerodynamic and hydrodynamic parameters. This approach led, in particular, to the setting of a new world record of 53.49 knots over 500 meters in late 2024, confirming the validity of the step-by-step approach adopted by the Zephir Project. Press contacts. Slide 1 of 2 Gilles GALINIER VP Communication Anne PLAISANCE Corporate Press relations manager

Arkema extends key three corporate philanthropy partnerships to 2028. Committed for more than a decade to education, inclusion, and diversity, Arkema has renewed its partnerships with Sport dans la Ville, the CGénial Foundation, and the Théâtre des Champs-Élysées for another three years. Through these corporate philanthropy initiatives, the Group is strengthening its efforts to support career guidance for young people, facilitate their professional integration, and expand their access to culture. By renewing these partnerships through 2028, Arkema is reaffirming its commitment to taking concrete action in support of equal opportunity. Through sports, exposure to scientific careers, and access to culture, we aim to help young people envision their futures, build confidence, and shape their own paths." Thierry Parmentier, Group Executive Vice President of Human Resources and Communications Sport dans la ville: sports as a powerful driver of inclusion. A partner of Sport dans la Ville since 2019, Arkema has already helped support the development of more than 4,700 young people. Of these, 500 have taken part in initiatives organized with the Group, including professional immersion experiences, site visits, career-preparation workshops, and mentoring. Over the next three years, Arkema is deepening its commitment by contributing to the construction and renovation of nine sports fields. At the same time, the Group will continue supporting the Job dans la Ville program, which focuses on the social and professional integration of young people. CGénial foundation: encouraging scientific and technical careers. Since 2016, Arkema has worked with the CGénial Foundation to introduce young people to scientific and industrial professions and to encourage diverse career pathways for both girls and boys. Over nearly a decade, this partnership has enabled close to 21,000 students to meet an Arkema employee and more than 700 teachers to explore industrial careers through visits to the Group's production sites. Théâtre des Champs-Élysées: expanding access to culture. A partner of the Théâtre des Champs-Élysées since 2017, the Group contributes to the institution's initiatives to raise awareness of classical music, particularly through its Jeune Public opera series. Each year, more than 12,000 children from elementary and middle schools in Paris and the surrounding region are introduced to the world of opera through interactive performances designed specifically for young audiences. In addition, Arkema enables young girls supported by Sport dans la Ville, and their families, to attend these performances, reflecting the Group's commitment to building bridges between its various initiatives. Go further: Press contacts. Slide 1 of 2 Gilles GALINIER VP Communication Anne PLAISANCE Corporate Press relations manager

Arkema expands its Kynar(R) PVDF production capacity in China to support strong market growth. Arkema announces a 20% expansion of production capacity at its Changshu Kynar(R) PVDF manufacturing site in China scheduled to start up in 2028. This significant investment reflects the Group's strategy to increase its Kynar(R) PVDF footprint at a pace and with capabilities that match the strong and accelerating demand across the Asia-Pacific region and beyond. PARIS LA DÉFENSE-(BUSINESS WIRE)-Regulatory News: Arkema (Paris:AKE) unveils a 20% expansion of its Kynar(R) PVDF production capacity at its Changshu site in China, with the new unit expected to start up in 2028. This additional capacity is designed to support the strong and sustained growth in demand for Kynar(R) PVDF across all key markets, including lithium-ion batteries for electric vehicles (EV) and energy storage systems (ESS), high-performance coatings, chemical processing industries, semiconductor manufacturing, water filtration, and wire and cable. This project will meet the highest standards of operational excellence reflecting Arkema's commitment to continuously improving its manufacturing operations at all sites worldwide. "This expansion marks an exciting milestone for Arkema, as we are investing once again with confidence to increase and strengthen our capabilities in Changshu", said Laurent Tellier, Senior Vice-President of Arkema's High Performance Polymers and Fluorogases. "This investment will allow us to continue to support our customers' growth with even more agile and reliable supply, while addressing the market's need for constant and rapid innovation." The project is supported by Arkema's robust global R&D ecosystem, which ensures the Group's innovation leadership in PVDF advanced applications and technologies. This ecosystem includes the Changshu R&D center in China, as well as R&D centers in France, Japan, South Korea and in the United States. Together, these laboratories enable Arkema to collaborate closely with customers and accelerate development of high-performance solutions for the energy transition and advanced manufacturing industries. Arkema is a global leader in PVDF production, with the Changshu platform as its largest manufacturing site worldwide. The Group also produces PVDF in Calvert City, Kentucky in the United States, where a new capacity increase was announced last year and will start up in the second quarter of 2026, as well as in its Pierre-Benite site in France. Contacts. Investor relations contacts: Béatrice Zilm +33 (0)1 49 00 75 58 [email protected] James Poutier +33 (0)1 49 00 73 12 [email protected] Colombe Boiteux +33 (0)1 49 00 72 07 [email protected] Alexis Noël +33 (0)1 49 00 74 37 [email protected] Media Contact: Anne Plaisance +33 (0)6 81 87 48 77 [email protected] More News From Arkema COLOMBES, France-( BUSINESS WIRE )-Regulatory News: Arkema (Paris:AKE): Date Total number of shares Total number of Voting Right (including shares held by the Company) Total number of Voting Right (excluding shares held by the Company) February 28, 2026 76,060,831 95,362,268 94,964,128... PARIS-( BUSINESS WIRE )-Regulatory News: Arkema (PARIS:AKE): EBITDA at €1,251 million, within the guidance range, and EBITDA margin at 13.8%, in a weak demand environment in the US and Europe, while Asia remained more dynamic Additional EBITDA contribution from major projects at around €60 million vs 2024 Good resilience of Specialty Materials, overshadowed by the cyclical impact of acrylics and the decline of old-generation refrigerants Strict cost discipline offsetting fixed cost inflation wh... COLOMBES, France-( BUSINESS WIRE )-Regulatory News: Arkema (Paris:AKE): Date Total number of shares Total number of Voting Right (including shares held by the Company) Total number of Voting Right (excluding shares held by the Company) January 31, 2026 76,060,831 95,365,065 94,952,297...