Avantium NV Formerly known as Avantium Holding BV. Avantium NV, formerly Avantium Holding BV, is a company based in the Netherlands engaged in environmental research and development (R&D). The Company develops chemical technologies and production processes to convert bio-based feedstock into sustainable products. The Company's business comprises three segments: Catalysis, Renewable Chemistries, and YXY. Catalysis segment provides catalysis R&D services and systems to chemical, refinery and energy companies, utilizing its Flowrence Technology Platform to devise the appropriate catalyst testing solutions. Renewable Chemistries is the development division with a portfolio of projects focusing on the conversion of biomass to chemical building blocks and plastic materials. The YXY segment comprises the activities of Syviana, the joint venture with BASF SE. The YXY technology is used to convert plant-based sugars into chemical building blocks for plastics, such as polymer polyethylenefuranoate (PEF), and other applications.