144 0001581835 XXXXXXXX LIVE 0001563411 CONSTELLIUM SE 001-35931 300 East Lombard Street Suite 1710 Baltimore MD 21202 443-420-7861 Bpifrance Participations SA May be deemed an affiliate Ordinary Shares BNP Paribas Securities Corp.

787 7th Avenue New York NY 10019

2095000 69637800.00 136150450 05/26/2026 NYSE Ordinary Shares J.P. Morgan Securities LLC

270 Park Avenue New York NY 10017

2095000 69637800.00 136150450 05/26/2026 NYSE Ordinary Shares 05/29/2013 Purchased in initial public offering IPO Underwriters N 645488 05/29/2013 Cash Ordinary Shares 11/03/2017 Underwritten Offering Underwriter N 2447578 11/03/2017 Cash Ordinary Shares 06/05/2017 Open Market Purchases Open Market Purchases N 1096934 06/05/2017 Cash Y Aggregate market value is as of May 22, 2026. The 1,096,934 shares acquired in open market purchases were acquired and paid for between 6/5/2017 and 9/8/2017 05/26/2026 /s/ Emmanuel Blot, as Investment Director