In our capacity as Statutory Auditor of Constellium SE (hereinafter the ”entity”), appointed as an independent third party and accredited by Cofrac (Cofrac Inspection Accreditation n°available at www.cofrac.fr), we conducted our work in order to provide a report expressing a limited assurance conclusion on the historical information (observed and extrapolated) of the consolidated non-financial information statement (hereinafter respectively the “Information” and the “Statement”), prepared in accordance with the Entity’s procedures (hereinafter the “Guidelines”), for year ended on the 31st of December 2021, included in the management report pursuant to the legal and regulatory provisions of articles L. 225 102-1, R. 225-105 and R. 225105-1 of the French Commercial Code (Code de commerce).