The Stellantis Poissy plant is a car plant belonging to Stellantis located in Poissy, Yvelines, France. It is dedicated to the manufacturer's Platform 1 cars, which are cars in the subcompact class, with an annual output of approximately 200,000 cars. Together with the R&D Centres at Carrières-sous-Poissy and at Vélizy, it is one of three major establishments that the company runs in the department.

Stellantis N.V. is a multinational automotive manufacturing corporation formed from the merger in 2021 of the Italian–American conglomerate Fiat Chrysler Automobiles (FCA) and the French PSA Group. The company is headquartered in Amsterdam.