EX-23.1 12 exhibit231_pwcxcstmxcons.htm EX-23.1 exhibit231_pwcxcstmxcons
1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-279450, 333-256148, 333-191905, 333-201141, 333-225926) of Constellium SE of our report dated February 25, 2026 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K. /s/ PricewaterhouseCoopers Audit Neuilly Sur Seine, France February 25, 2026