Lanxess Aktiengesellschaft (styled as LANXESS) is a specialty chemicals group based in Cologne, Germany. The group was founded in 2004 with the spin-off of the chemicals division and parts of the polymers segment from Bayer AG. Lanxess' core business is the development, manufacturing and marketing of plastics, rubber, intermediates and specialty chemicals. The company is listed in the Dow Jones Sustainability Index and FTSE4Good Index. Lanxess is the ninth largest chemicals group in Germany in terms of sales. Shares in Lanxess AG were listed in Germany’s DAX from September 24, 2012 to September 21, 2015 and currently form part of MDAX, a midcap index.