Polymethyl methacrylate (PMMA) is a transparent and rigid plastic produced from the polymerisation of methyl methacrylate (the monomer). It is often used as an alternative to glass in applications including skylights, sanitary products (bathtubs, shower trays), advertisement, interiors, automotive lighting, electronics and more. Currently, only about 10 % of annual PMMA production is recycled to recover the monomer. The EU-funded MMAtwo project is developing a novel PMMA recycling value chain and technologies from collection to depolymerization to re-use in optical and non-optical applications. There is focus on recycling end-of-life PMMA waste and contaminated PMMA waste.