Citroën is a French automobile brand. The "Automobiles Citroën" manufacturing company was founded in 4 June 1919 by André Citroën. Citroën has been owned by Stellantis since 2021 and previously was part of the PSA Group after Peugeot acquired 89.95% share in 1976. Citroën's head office is located in the Stellantis Poissy Plant in Saint-Ouen-sur-Seine since 2021 and its offices studies and research in Vélizy-Villacoublay, Poissy (CEMR), Carrières-sous-Poissy and Sochaux-Montbéliard.

Peugeot is a French brand of automobiles owned by Stellantis. The family business that preceded the current Peugeot companies was founded in 1810, and it is regarded as the oldest car company in the world. On 20 November 1858, Émile Peugeot applied for the lion trademark. Armand Peugeot (1849–1915) built the company's first car steam tricycle. They joined forces with Léon Serpollet in 1886; this was followed in 1890 by an internal combustion car with a Panhard-Daimler engine.