144 0002093449 XXXXXXXX LIVE 0001563411 Constellium SE 001-35931 300 E Lombard Street suite 1710 Baltimore MD 21202 4124033233 Philippe Hoffmann affiliate Common Stock J.P. Morgan Securities LLC 270 Park Ave 10th Floor New York NY 10017 50000 1595990.4 135069771 05/01/2026 NYSE Common Stock 03/09/2026 PSU Issuance Constellium SE (issuer) N 32818 03/09/2026 Equity Compensation Common Stock 03/09/2026 RSU Issuance Constellium SE (issuer) N 17182 03/09/2026 Equity Compensation N Philippe Hoffmann corniche du Soleil 17 Sierre V8 3960 Class A Shares 03/04/2026 80000 2115512.55 Philippe Hoffmann corniche du Soleil 17 Sierre V8 3960 Class A Shares 03/10/2026 4728 122328.17 05/01/2026 J.P. Morgan Securities LLC, Workplace Solutions, as Agent and Attorney in Fact for Philippe Hoffmann, Constellium SE