Accsys Technologies PLC develops and commercialises proprietary wood modification technologies through acetylation processes to produce high-performance, sustainable building materials; it manufactures and sells Accoya solid wood for applications including cladding, decking, windows, doors and structural elements, licenses Tricoya wood elements technology for panels and engineered wood products, and provides related services such as technical support and licensing to global partners. Founded in 2005 and headquartered in London, United Kingdom, the company operates production facilities in Arnhem, Netherlands, and through its 60%-owned joint venture Accoya USA LLC with Eastman Chemical Company in Kingsport, Tennessee, USA, which launched commercial operations in September 2024 to serve North American markets; it maintains sales and distribution networks across Europe, North America, Asia-Pacific and other regions, targeting architects, manufacturers, developers and governments focused on sustainable construction. Recent developments include the completion of major capital investments with the successful ramp-up of Accoya USA production capacity, discontinuation of the Tricoya plant in Hull, UK, to streamline operations, agreement in October 2025 on new €55 million debt financing facilities from ABN AMRO Bank N.V. and HSBC UK Bank PLC, a strategic distribution partnership with Hardwoods Specialty Products USLP to expand Accoya sales in the United States, and reporting strong first-half 2026 results with 160% adjusted EBITDA growth driven by global Accoya volume increases.