PSA Peugeot Citroën (officially Peugeot S.A., informally PSA) is a French multinational manufacturer of automobiles and motorcycles sold under the Peugeot, Citroën and DS brands. PSA is listed on the Euronext Paris stock exchange and is once again a constituent of the CAC 40 index (2015) after having been removed in 2012. Headquartered in the 16th arrondissement of Paris, PSA (with 2.9 million units) is in 2012 the second-largest Europe-based automaker, and the ninth largest in the world, measured by unit production (sixth in 2009)