Form 8-K Filing Summary

Constellium SE held its Annual General Meeting of Shareholders on May 21, 2026. Key proposals included the appointment of Ingrid Joerg and re-appointment of John Ormerod to the Board of Directors, both of which passed for a three-year term. Shareholders also approved, on an advisory basis, an annual vote on executive compensation. Several other proposals concerning financial statements, director fees, share repurchases, and capital reduction were also voted on and approved. The company will hold its advisory vote on executive compensation annually. Exhibits include the Form 8-K cover page in Inline XBRL.