BASF plc maintains operations in the UK and Ireland for its Germany-based parent group BASF SE, the world's largest chemical company. The company operates through three main units, Construction Solutions, Crop Protection, and Pest Control Solutions. It manufactures a variety of chemicals and products, including concrete additives, insulation foams, polyurethane systems, industrial coatings and pigments, fungicides, and biocides. The company has built up its operations in the UK and Ireland through acquisitions from Ciba, Cognis, and Sorex. The former Cognis site in Cork is operated by BASF Ireland. BASF plc has operated since 1989.