UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 __________________________________________________________________________ FORM 20-F __________________________________________________________________________ ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35931 __________________________________________________________________________ Constellium SE (Exact Name of Registrant as Specified in its Charter) __________________________________________________________________________ Constellium SE (Translation of Registrant’s name into English) __________________________________________________________________________ France (Jurisdiction of incorporation or organization) __________________________________________________________________________ Washington Plaza, 300 East Lombard Street 40-44 rue Washington Suite 1710 75008 Paris Baltimore, MD, 21202 France United States (Head Office) (Address of principal executive offices) Rina E. Teran Chief Securities Counsel 300 East Lombard Street, Suite 1710, Baltimore, MD, 21202 United States Tel: (443) 420-7861 E-mail:
[email protected] (Name, telephone, e-mail and/or facsimile